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From: Luyuan Fang <lufang@microsoft.com>
To: "thomas.morin@orange.com" <thomas.morin@orange.com>, "bess@ietfa.amsl.com" <bess@ietfa.amsl.com>
Thread-Topic: Re: [bess] Poll for adoption: draft-hao-bess-inter-nvo3-vpn-optionc
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Date: Sun, 1 Nov 2015 13:30:52 +0000
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Cc: Osama Zia <osamaz@microsoft.com>
Subject: Re: [bess] Poll for adoption: draft-hao-bess-inter-nvo3-vpn-optionc
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Support.

Luyuan



-----Original Message-----

From: Thomas Morin [mailto:thomas.morin@orange.com]

Sent: Thursday, October 22, 2015 8:31 AM

To: bess@ietf.org

Cc: draft-hao-bess-inter-nvo3-vpn-optionc@tools.ietf.org

Subject: Poll for adoption: draft-hao-bess-inter-nvo3-vpn-optionc



Hello working group,



This email starts a two-week poll on adopting

draft-hao-bess-inter-nvo3-vpn-optionc-03 [1] as a working group item.



Please send comments to the list and state if you support adoption or not (=
in the later case, please also state the reasons).



This poll runs until **November 13th**.

(3 weeks to account for the busy IETF week)





*Coincidentally*, we are also polling for knowledge of any IPR that applies=
 to this draft, to ensure that IPR has been disclosed in compliance with IE=
TF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).



=3D=3D> *If* you are listed as a document author or contributor please resp=
ond to this email and indicate whether or not you are aware of any relevant=
 IPR.



The draft will not be adopted until a response has been received from each =
author and contributor.



If you are not listed as an author or contributor, then please explicitly r=
espond only if you are aware of any IPR that has not yet been disclosed in =
conformance with IETF rules.



Thank you,



Martin & Thomas

bess chairs




















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<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">Support.<o:p></o:p></span><=
/pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">Luyuan<o:p></o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">-----Original Message-----<=
o:p></o:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">From: Thomas Morin [mailto:=
thomas.morin@orange.com] <o:p></o:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">Sent: Thursday, October 22,=
 2015 8:31 AM<o:p></o:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">To: bess@ietf.org<o:p></o:p=
></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">Cc: draft-hao-bess-inter-nv=
o3-vpn-optionc@tools.ietf.org<o:p></o:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">Subject: Poll for adoption:=
 draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">Hello working group,<o:p></=
o:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">This email starts a two-wee=
k poll on adopting<o:p></o:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">draft-hao-bess-inter-nvo3-v=
pn-optionc-03 [1] as a working group item.<o:p></o:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">Please send comments to the=
 list and state if you support adoption or not (in the later case, please a=
lso state the reasons).<o:p></o:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">This poll runs until **Nove=
mber 13th**.<o:p></o:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">(3 weeks to account for the=
 busy IETF week)<o:p></o:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">*Coincidentally*, we are al=
so polling for knowledge of any IPR that applies to this draft, to ensure t=
hat IPR has been disclosed in compliance with IETF IPR rules (see RFCs 3979=
, 4879, 3669 and 5378 for more details).<o:p></o:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">=3D=3D&gt; *If* you are lis=
ted as a document author or contributor please respond to this email and in=
dicate whether or not you are aware of any relevant IPR.<o:p></o:p></span><=
/pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">The draft will not be adopt=
ed until a response has been received from each author and contributor.<o:p=
></o:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">If you are not listed as an=
 author or contributor, then please explicitly respond only if you are awar=
e of any IPR that has not yet been disclosed in conformance with IETF rules=
.<o:p></o:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">Thank you,<o:p></o:p></span=
></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">Martin &amp; Thomas<o:p></o=
:p></span></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black">bess chairs<o:p></o:p></spa=
n></pre>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
<span style=3D"font-family:Courier;color:black"><o:p>&nbsp;</o:p></span></p=
re>
<pre style=3D"line-height:13.5pt;background:white;vertical-align:baseline">=
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From nobody Sun Nov  1 08:58:08 2015
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From: Lizhenbin <lizhenbin@huawei.com>
To: "thomas.morin@orange.com" <thomas.morin@orange.com>, "bess@ietfa.amsl.com" <bess@ietfa.amsl.com>
Thread-Topic: Re: [bess] Poll for adoption: draft-hao-bess-inter-nvo3-vpn-optionc
Thread-Index: AdEUqPrjPZPulUYXQRu34sQ6DuKGEQAHMUvq
Date: Sun, 1 Nov 2015 16:55:59 +0000
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<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">
<p><span style=3D"FONT-FAMILY: Courier; COLOR: black">Support WG adoption. =
This is truly the useful work and well accepted.</span></p>
<div style=3D"FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px=
">
<div style=3D"DIRECTION: ltr"><span style=3D"FONT-FAMILY: Courier; COLOR: b=
lack"></span>&nbsp;</div>
<div style=3D"DIRECTION: ltr"><span style=3D"FONT-FAMILY: Courier; COLOR: b=
lack">Best Regards,</span></div>
<div style=3D"DIRECTION: ltr"><span style=3D"FONT-FAMILY: Courier; COLOR: b=
lack">Zhenbin(Robin)</span></div>
<div style=3D"DIRECTION: ltr"><span style=3D"FONT-FAMILY: Courier; COLOR: b=
lack"></span>&nbsp;</div>
<div style=3D"DIRECTION: ltr"><span style=3D"FONT-FAMILY: Courier; COLOR: b=
lack"></span>&nbsp;</div>
<div>
<div class=3D"WordSection1">
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">-----Original Messa=
ge-----</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">From: Thomas Morin =
[mailto:thomas.morin@orange.com] </span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">Sent: Thursday, Oct=
ober 22, 2015 8:31 AM</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">To: bess@ietf.org</=
span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">Cc: draft-hao-bess-=
inter-nvo3-vpn-optionc@tools.ietf.org</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">Subject: Poll for a=
doption: draft-hao-bess-inter-nvo3-vpn-optionc</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">Hello working group=
,</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">This email starts a=
 two-week poll on adopting</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">draft-hao-bess-inte=
r-nvo3-vpn-optionc-03 [1] as a working group item.</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">Please send comment=
s to the list and state if you support adoption or not (in the later case, =
please also state the reasons).</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">This poll runs unti=
l **November 13th**.</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">(3 weeks to account=
 for the busy IETF week)</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">*Coincidentally*, w=
e are also polling for knowledge of any IPR that applies to this draft, to =
ensure that IPR has been disclosed in compliance with IETF IPR rules (see R=
FCs 3979, 4879, 3669 and 5378 for more details).</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">=3D=3D&gt; *If* you=
 are listed as a document author or contributor please respond to this emai=
l and indicate whether or not you are aware of any relevant IPR.</span></pr=
e>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">The draft will not =
be adopted until a response has been received from each author and contribu=
tor.</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">If you are not list=
ed as an author or contributor, then please explicitly respond only if you =
are aware of any IPR that has not yet been disclosed in conformance with IE=
TF rules.</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">Thank you,</span></=
pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">Martin &amp; Thomas=
</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">bess chairs</span><=
/pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"LINE-HEIGHT: 13.5pt; BACKGROUND: white; VERTICAL-ALIGN: basel=
ine"><span style=3D"FONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
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From: Xuxiaohu <xuxiaohu@huawei.com>
To: Quintin zhao <quintin.zhao@huawei.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] Poll for adoption: draft-hao-bess-inter-nvo3-vpn-optionc
Thread-Index: AQHREWRbF06gR8C56UO49qZRkcsQnZ6CDjWagAODvWGAAMMEkP//hTUAgAJYASk=
Date: Mon, 2 Nov 2015 04:57:29 +0000
Message-ID: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0CB41774@NKGEML512-MBS.china.huawei.com>
References: <SNT148-W54A816FFFF7C8070DB375C8B210@phx.gbl>, <DD5FC8DE455C3348B94340C0AB5517334F8D51D2@nkgeml501-mbs.china.huawei.com> <DD5FC8DE455C3348B94340C0AB5517334F8D51E5@nkgeml501-mbs.china.huawei.com> <4A95BA014132FF49AE685FAB4B9F17F657D78428@dfweml701-chm>, <11208E03C9803E4CB4C3D898F153D6C03910EA03@SJCEML701-CHM.china.huawei.com>
In-Reply-To: <11208E03C9803E4CB4C3D898F153D6C03910EA03@SJCEML701-CHM.china.huawei.com>
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Subject: Re: [bess] Poll for adoption: draft-hao-bess-inter-nvo3-vpn-optionc
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">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">
<p>How to interconnect DC VPNs with WAN VPNs in a much scalable way is very=
 important in the hybrid cloud scenario, especially for those SPs who opera=
te both DC&nbsp;VPNs and WAN VPNs.&nbsp;Therefore, it support the WG adopti=
on of this draft.</p>
<p>&nbsp;</p>
<p>Best regards,</p>
<p>Xiaohu</p>
<p>&nbsp;</p>
<div style=3D"FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px=
">
<hr tabindex=3D"-1">
<div style=3D"DIRECTION: ltr" id=3D"divRpF946540"><font color=3D"#000000" s=
ize=3D"2" face=3D"Tahoma"><b>=B7=A2=BC=FE=C8=CB:</b> BESS [bess-bounces@iet=
f.org] =B4=FA=B1=ED Quintin zhao [quintin.zhao@huawei.com]<br>
<b>=B7=A2=CB=CD=CA=B1=BC=E4:</b> 2015=C4=EA11=D4=C21=C8=D5 9:06<br>
<b>=CA=D5=BC=FE=C8=CB:</b> bess@ietf.org<br>
<b>=D6=F7=CC=E2:</b> Re: [bess] Poll for adoption: draft-hao-bess-inter-nvo=
3-vpn-optionc<br>
</font><br>
</div>
<div></div>
<div>
<div class=3D"WordSection1">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Tahoma','sans-serif'; F=
ONT-SIZE: 10pt">Support. &nbsp;This draft is a practical solution for VPN n=
etwork and NVO3 inter-connection.</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Tahoma','sans-serif'; F=
ONT-SIZE: 10pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Tahoma','sans-serif'; F=
ONT-SIZE: 10pt">Quintin Zhao</span><span style=3D"FONT-FAMILY: 'Calibri','s=
ans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"></span></p>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Times New Roman','serif=
'; COLOR: black; FONT-SIZE: 9.5pt"></span>&nbsp;</p>
</div>
<div>
<h1 style=3D"MARGIN: 0in 0in 0pt; BACKGROUND: white; VERTICAL-ALIGN: baseli=
ne"><span style=3D"FONT-FAMILY: 'Tahoma','sans-serif'; COLOR: black; FONT-S=
IZE: 14.5pt; FONT-WEIGHT: normal">-----------------------------------------=
--------------------------------------------</span></h1>
<p style=3D"LINE-HEIGHT: 10.8pt; BACKGROUND: white; VERTICAL-ALIGN: baselin=
e" id=3D"msg-info" class=3D"MsoNormal">
<span class=3D"pipe"><span style=3D"BORDER-BOTTOM: windowtext 1pt; BORDER-L=
EFT: windowtext 1pt; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT:=
 0in; FONT-FAMILY: inherit; COLOR: #666666; FONT-SIZE: 7pt; BORDER-TOP: win=
dowtext 1pt; BORDER-RIGHT: windowtext 1pt; PADDING-TOP: 0in">&quot;Susan
 Hares&quot; &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_blank">share=
s@ndzh.com</a>&gt;</span></span><span style=3D"FONT-FAMILY: 'Tahoma','sans-=
serif'; COLOR: #666666; FONT-SIZE: 7pt">&nbsp;</span><span class=3D"pipe"><=
span style=3D"BORDER-BOTTOM: windowtext 1pt; BORDER-LEFT: windowtext 1pt; P=
ADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; FONT-FAMILY: inh=
erit; COLOR: #666666; FONT-SIZE: 7pt; BORDER-TOP: windowtext 1pt; BORDER-RI=
GHT: windowtext 1pt; PADDING-TOP: 0in">Tue,
 27 October 2015 15:59 UTC</span></span><span style=3D"FONT-FAMILY: 'Tahoma=
','sans-serif'; COLOR: #666666; FONT-SIZE: 7pt"><a id=3D"toggle" href=3D"ht=
tps://mailarchive.ietf.org/arch/search/?email_list=3Dbess" target=3D"_blank=
"><span style=3D"BORDER-BOTTOM: windowtext 1pt; BORDER-LEFT: windowtext 1pt=
; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; FONT-FAMILY: =
inherit; COLOR: #5b80b2; BORDER-TOP: windowtext 1pt; BORDER-RIGHT: windowte=
xt 1pt; TEXT-DECORATION: none; PADDING-TOP: 0in">Show
 header</span></a></span></p>
<div style=3D"MARGIN-TOP: 0.25in" id=3D"msg-payload">
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">Support as a co-author.&nbsp;&nbsp; I am=
 not aware of any IPR relating to this draft. </span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">This option provides a highly scalable o=
ption&nbsp; for stitching NV03 networks and MPLS/IP VPN for those devices w=
hich can provide transport-layer stitching. </span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">Sue Hares</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">-----Original Message-----</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">From: Thomas Morin [<a href=3D"mailto:th=
omas.morin@orange.com" target=3D"_blank">mailto:thomas.morin@orange.com</a>=
] </span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">Sent: Thursday, October 22, 2015 11:31 A=
M</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">To: <a href=3D"mailto:bess@ietf.org" tar=
get=3D"_blank">bess@ietf.org</a></span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">Cc: <a href=3D"mailto:draft-hao-bess-int=
er-nvo3-vpn-optionc@tools.ietf.org" target=3D"_blank">draft-hao-bess-inter-=
nvo3-vpn-optionc@tools.ietf.org</a></span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">Subject: Poll for adoption: draft-hao-be=
ss-inter-nvo3-vpn-optionc</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">Hello working group,</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">This email starts a two-week poll on ado=
pting</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">draft-hao-bess-inter-nvo3-vpn-optionc-03=
 [1] as a working group item.</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">Please send comments to the list and sta=
te if you support adoption or not (in the later case, please also state the=
 reasons).</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">This poll runs until **November 13th**.<=
/span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">(3 weeks to account for the busy IETF we=
ek)</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">*Coincidentally*, we are also polling fo=
r knowledge of any IPR that applies to this draft, to ensure that IPR has b=
een disclosed in compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 =
and 5378 for more details).</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">=3D=3D&gt; *If* you are listed as a docu=
ment author or contributor please respond to this email and indicate whethe=
r or not you are aware of any relevant IPR.</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">The draft will not be adopted until a re=
sponse has been received from each author and contributor.</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">If you are not listed as an author or co=
ntributor, then please explicitly respond only if you are aware of any IPR =
that has not yet been disclosed in conformance with IETF rules.</span></pre=
>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">Thank you,</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">Martin &amp; Thomas</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">bess chairs</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">&nbsp;</span></pre>
<pre style=3D"BACKGROUND: white; VERTICAL-ALIGN: baseline"><span style=3D"F=
ONT-FAMILY: Courier; COLOR: black">[1] <a href=3D"https://tools.ietf.org/ht=
ml/draft-hao-bess-inter-nvo3-vpn-optionc-03" target=3D"_blank">https://tool=
s.ietf.org/html/draft-hao-bess-inter-nvo3-vpn-optionc-03</a></span></pre>
</div>
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</div>
</div>
</div>
</div>
</div>
</div>
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10pt;">
<p>Hi Alvaro,</p>
<p>&nbsp;</p>
<p>Thanks for your detailed AD review. We will update the draft according t=
o your comments soon.</p>
<p>&nbsp;</p>
<p>Best regards,</p>
<p>Xiaohu (on behalf of all co-authors)</p>
<div style=3D"FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px=
">
<hr tabindex=3D"-1">
<div style=3D"DIRECTION: ltr" id=3D"divRpF791949"><font color=3D"#000000" s=
ize=3D"2" face=3D"Tahoma"><b>=B7=A2=BC=FE=C8=CB:</b> Alvaro Retana (aretana=
) [aretana@cisco.com]<br>
<b>=B7=A2=CB=CD=CA=B1=BC=E4:</b> 2015=C4=EA10=D4=C228=C8=D5 5:38<br>
<b>=CA=D5=BC=FE=C8=CB:</b> draft-ietf-bess-virtual-subnet@ietf.org<br>
<b>=B3=AD=CB=CD:</b> VIGOUREUX, MARTIN (MARTIN); bess-chairs@ietf.org; bess=
@ietf.org<br>
<b>=D6=F7=CC=E2:</b> AD Review of draft-ietf-bess-virtual-subnet-02<br>
</font><br>
</div>
<div></div>
<div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
Dear authors:</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
<br>
</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
I just finished reading this document. &nbsp;</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
<br>
</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
All of what is described in this document is straight forward, so much so t=
hat it requires no change to existing technology, which makes me think that=
 users/operators have been able to do this all along. &nbsp;Is that correct=
? &nbsp;Is there anything special that was
 missing that this document brings to light? &nbsp;</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
<br>
</div>
<div><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FON=
T-SIZE: 14px">Being one of several possible solutions for &quot;</span><fon=
t face=3D"Calibri,sans-serif">network virtualization overlays within and/or=
 between&nbsp;</font><font face=3D"Calibri,sans-serif">data
 centers&quot;</font><span style=3D"FONT-FAMILY: Calibri,sans-serif; FONT-S=
IZE: 14px">, I'm wondering about the value of publishing what amounts to a =
set of use cases without even discussing when their use would be suitable (=
declared out of scope). &nbsp;I reviewed the
 discussions on the lists (l3vpn/bess) and can clearly see why the Shepherd=
 characterized the document as &quot;could have been considered controversi=
al&quot;. &nbsp;Had I reviewed the document at adoption time I probably wou=
ld have ended up in the rough side of the consensus.
 &nbsp;There's obviously no need to revisit the topic of what do to with th=
is document since clearly the WG Chairs believe there is consensus to publi=
sh.</span></div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
<br>
</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
I do have some other comments (below). In general some of the text could be=
 made easier to read (see some nits below). &nbsp;I would like to see my co=
mment about rfc2119 language addressed (and an update published) before sta=
rting the IETF Last Call.</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
<br>
</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
Thanks!</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
<br>
</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
Alvaro.</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
<br>
</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
<br>
</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
<span style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZ=
E: 14px">Major:</span></div>
<ol>
<li style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE:=
 14px"><span style=3D"FONT-FAMILY: Calibri,sans-serif; FONT-SIZE: 14px">The=
 use of rfc2119 keywords is not required. &nbsp;Note that in general these =
keywords &quot;</span><font face=3D"Calibri,sans-serif">MUST
 only be used where it is&nbsp;</font><font face=3D"Calibri,sans-serif">act=
ually required for interoperation&quot;, but you're using them to apparentl=
y express requirements w/out specific guidance or to restate what is normal=
 network operation . &nbsp;For example:</font>
<ul>
<li style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE:=
 14px"><font face=3D"Calibri,sans-serif">In Section&nbsp;</font><font face=
=3D"Calibri,sans-serif">3.3. (CE Host Discovery) the text reads: &quot;</fo=
nt>PE routers SHOULD be able to discover their local
 CE hosts=A1=AD PE routers could accomplish local CE host discovery by=A1=
=ADARP or ND=A1=ADLLDP=A1=ADVDP), or even interaction with the data center =
orchestration system=A1=AD&quot; &nbsp;There is no specific mechanism manda=
ted that supports the use of &quot;SHOULD&quot;.
</li><li style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-=
SIZE: 14px">In Section&nbsp;3.4. (ARP/ND Proxy): &quot;PE routers SHOULD on=
ly respond to an ARP request or Neighbor Solicitation (NS) message for a ta=
rget host when it has a best route for that target
 host in the associated VRF and the outgoing interface of that best route i=
s different from the one over which the ARP request or NS message is receiv=
ed.&quot; &nbsp;Isn't this how proxy ARP already works? &nbsp;Am I missing =
something that requires the use of &quot;SHOULD&quot; in
 this document? </li><li><font style=3D"FONT-FAMILY: Calibri,sans-serif; CO=
LOR: rgb(0,0,0); FONT-SIZE: 14px" face=3D"Calibri,sans-serif">Section&nbsp;=
4.3. (TTL and Traceroute) describes a limitation and then says &quot;=A1=AD=
</font><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); F=
ONT-SIZE: 14px">unless
 special TTL processing&nbsp;</span><span style=3D"FONT-FAMILY: Calibri,san=
s-serif; COLOR: rgb(0,0,0); FONT-SIZE: 14px">for such case has been impleme=
nted (e.g., if the source and&nbsp;</span><font face=3D"Calibri,sans-serif"=
>destination addresses=A1=ADbelong to the&nbsp;</font><span style=3D"FONT-F=
AMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE: 14px">same
 extended subnet, neither ingress nor egress PE routers SHOULD&nbsp;</span>=
<font face=3D"Calibri,sans-serif">decrement the TTL=A1=ADTTL of such&nbsp;<=
/font><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FO=
NT-SIZE: 14px">packet SHOULD NOT be copied into the
 TTL of the transport</span><font face=3D"Calibri,sans-serif">=A1=AD&quot; =
&nbsp;In this case the rfc2119 keywords are used as part of an example (e.g=
.)..which doesn't really support the use of &quot;SHOULD/SHOULD NOT&quot;. =
&nbsp;Is the intent to specify this &quot;special processing&quot; in this
 document? &nbsp;If so, why &quot;SHOULD&quot; and not &quot;MUST&quot;? &n=
bsp;Algo, given that the text appears in the Limitations section, if you're=
 mandating the &quot;special processing&quot; then it wouldn't be a limitat=
ion anymore..</font></li></ul>
</li></ol>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
Minor:</div>
<ol style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE:=
 14px">
<li style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE:=
 14px">I think that RFC4761, 4762, 4659, 5798 and 6513 should be Informatio=
nal references.
</li><li style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-=
SIZE: 14px">You first use &quot;VS&quot; in Section 3.6. &nbsp;I'm assuming=
 this is related to &quot;virtual subnet&quot;, but there's no explicit ass=
ociation.
</li><li><font face=3D"Calibri,sans-serif">Multicast. &nbsp;Section&nbsp;3.=
2. (Multicast) says that for &quot;</font><span style=3D"FONT-FAMILY: Calib=
ri,sans-serif">IP multicast between CE hosts of the same virtual subnet,&nb=
sp;</span><span style=3D"FONT-FAMILY: Calibri,sans-serif">MVPN
 technologies [RFC6513] could be directly used without any&nbsp;</span><fon=
t face=3D"Calibri,sans-serif">change&quot;. &nbsp;I'm assuming that you're =
not referring to link-local multicast (between hosts on the same subnet) be=
cause later (Section 4.2) you say that &quot;</font><span style=3D"FONT-FAM=
ILY: Calibri,sans-serif">link-local&nbsp;</span><span style=3D"FONT-FAMILY:=
 Calibri,sans-serif">multicast
 traffic cannot be supported&quot;. &nbsp;Please clarify in 3.2 what type o=
f multicast you're talking about, and/or which you're not.</span>
</li><li><span style=3D"FONT-STYLE: normal; FONT-FAMILY: Calibri,sans-serif=
; COLOR: rgb(0,0,0); FONT-SIZE: 14px; FONT-WEIGHT: normal; TEXT-DECORATION:=
 none">Section&nbsp;</span><font face=3D"Calibri,sans-serif">4.3. (TTL and =
Traceroute). &nbsp;What does this mean: &quot;</font><span style=3D"FONT-FA=
MILY: Calibri,sans-serif">traceroute
 output would reflect the fact that&nbsp;</span><span style=3D"FONT-FAMILY:=
 Calibri,sans-serif">these two hosts belonging to the same subnet are actua=
lly connected&nbsp;</span><span style=3D"FONT-FAMILY: Calibri,sans-serif">v=
ia an virtual subnet emulated by ARP proxy, rather
 than a normal&nbsp;</span><span style=3D"FONT-FAMILY: Calibri,sans-serif">=
LAN&quot;? &nbsp;I think&nbsp;I know, but please be specific in the text.</=
span></li></ol>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
<br>
</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
Nits:</div>
<ol style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE:=
 14px">
<li style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE:=
 14px">Section&nbsp;1. (Introduction)
<ul style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE:=
 14px">
<li style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE:=
 14px">s/commonly used in those situations/commonly used in situations
</li><li style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-=
SIZE: 14px">There are a couple of very long sentences that could be simplif=
ied =A1=AA they make sense, but other reviewers may not capture the essence=
. &nbsp;Just a suggestion
<ul>
<li style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE:=
 14px">OLD&gt;</li></ul>
<ul>
<li></li><li><font face=3D"Calibri,sans-serif">As&nbsp;</font><span style=
=3D"FONT-FAMILY: Calibri,sans-serif">a result, the traffic from a cloud use=
r (i.e., a VPN user) which</span>
</li><li><font face=3D"Calibri,sans-serif">is destined for a given server l=
ocated at one data center</font>
</li><li><font face=3D"Calibri,sans-serif">location of such extended subnet=
 may arrive at another data</font>
</li><li><font face=3D"Calibri,sans-serif">center location firstly accordin=
g to the subnet route, and then</font>
</li><li><font face=3D"Calibri,sans-serif">be forwarded to the location whe=
re the service is actually</font>
</li><li><font face=3D"Calibri,sans-serif">located. &nbsp;This suboptimal r=
outing would obviously result in an</font>
</li><li><font face=3D"Calibri,sans-serif">unnecessary consumption of the b=
andwidth resource between data</font>
</li><li><font face=3D"Calibri,sans-serif">centers. &nbsp;Furthermore, in t=
he case where the traditional VPLS</font>
</li><li><span style=3D"FONT-FAMILY: Calibri,sans-serif">technology [RFC476=
1] [RFC4762] is used for data center</span>
</li><li><font face=3D"Calibri,sans-serif">interconnect and default gateway=
s of different data center</font>
</li><li><font face=3D"Calibri,sans-serif">locations are configured within =
the same virtual router</font>
</li><li><font face=3D"Calibri,sans-serif">redundancy group, the returning =
traffic from that server to the</font>
</li><li><font face=3D"Calibri,sans-serif">cloud user may be forwarded at l=
ayer2 to a default gateway</font>
</li><li><font face=3D"Calibri,sans-serif">located at one of the remote dat=
a center premises, rather than</font>
</li><li><font face=3D"Calibri,sans-serif">the one placed at the local data=
 center location. &nbsp;This</font>
</li><li><font face=3D"Calibri,sans-serif">suboptimal routing would also un=
necessarily consume the bandwidth</font>
</li><li><font face=3D"Calibri,sans-serif">resource between data centers</f=
ont> </li><li><font face=3D"Calibri,sans-serif">NEW&gt;</font> </li><li><fo=
nt face=3D"Calibri,sans-serif"></li><li>As a result, the traffic between a =
specific user and server, in different&nbsp; </li><li>data centers, may fir=
st be routed through a third data center. </li><li>This suboptimal routing =
would obviously result in an </li><li>unnecessary consumption of the bandwi=
dth resource between data </li><li>centers. &nbsp;Furthermore, in the case =
where traditional VPLS </li><li>technology [RFC4761] [RFC4762] is used for =
data center </li><li>interconnect, return traffic from a server may be forw=
arded to a </li><li>default gateway located in a different data center due =
to the configuration </li><li>in a virtual router redundancy group. &nbsp;T=
his </li><li>suboptimal routing would also unnecessarily consume the bandwi=
dth </li><li>resource between data centers.</font></li></ul>
</li></ul>
</li><li style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-=
SIZE: 14px">Please be consistent on how &quot;Layer 2&quot; and &quot;Layer=
 3&quot; is used..it is not consistent now. &nbsp;My personal preference is=
 &quot;Layer x&quot;.
</li><li style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-=
SIZE: 14px">s/CE hosts/hosts
</li><li style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-=
SIZE: 14px">s/ARP proxy/an&nbsp;ARP proxy
</li><li><font face=3D"Calibri,sans-serif">Missing references: &nbsp;&quot;=
</font><span style=3D"FONT-FAMILY: Calibri,sans-serif">Link Layer Discovery=
 Protocol (LLDP)&quot;, &quot;</span><span style=3D"FONT-FAMILY: Calibri,sa=
ns-serif">VSI Discovery and Configuration Protocol (VDP)&quot;</span></li><=
/ol>
</div>
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Subject: [bess] The BESS WG has adopted draft-hao-bess-inter-nvo3-vpn-optionc
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The BESS WG has adopted draft-hao-bess-inter-nvo3-vpn-optionc (entered by
Thomas Morin)

The document is available at
https://datatracker.ietf.org/doc/draft-hao-bess-inter-nvo3-vpn-optionc/


Comment:
This poll runs until **November 13th**.


From nobody Mon Nov  2 01:03:56 2015
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From: <thomas.morin@orange.com>
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Subject: Re: [bess] The BESS WG has adopted draft-hao-bess-inter-nvo3-vpn-optionc (*not yet*, in fact)
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Please ignore this bogus automated email: the document is just being 
called for adoption, and no decision will be taken before the call for 
adoption is over.

-Thomas

2015-11-02, IETF Secretariat:
>
> The BESS WG has adopted draft-hao-bess-inter-nvo3-vpn-optionc (entered by
> Thomas Morin)
>
> The document is available at
> https://datatracker.ietf.org/doc/draft-hao-bess-inter-nvo3-vpn-optionc/
>
>
> Comment:
> This poll runs until **November 13th**.
>


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From nobody Mon Nov  2 06:28:08 2015
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Subject: Re: [bess] Poll for adoption: draft-hao-bess-inter-nvo3-vpn-option3
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Content-Type: text/plain; charset="US-ASCII"

Support.

Ran Chen


-----Original Message-----

From: Thomas Morin [mailto:thomas.morin@orange.com]

Sent: Thursday, October 22, 2015 8:31 AM

To: bess@ietf.org

Cc: draft-hao-bess-inter-nvo3-vpn-optionc@tools.ietf.org

Subject: Poll for adoption: draft-hao-bess-inter-nvo3-vpn-optionc



Hello working group,



This email starts a two-week poll on adopting

draft-hao-bess-inter-nvo3-vpn-optionc-03 [1] as a working group item.



Please send comments to the list and state if you support adoption or not 
(in the later case, please also state the reasons).



This poll runs until **November 13th**.

(3 weeks to account for the busy IETF week)





*Coincidentally*, we are also polling for knowledge of any IPR that 
applies to this draft, to ensure that IPR has been disclosed in compliance 
with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).



==> *If* you are listed as a document author or contributor please respond 
to this email and indicate whether or not you are aware of any relevant 
IPR.



The draft will not be adopted until a response has been received from each 
author and contributor.



If you are not listed as an author or contributor, then please explicitly 
respond only if you are aware of any IPR that has not yet been disclosed 
in conformance with IETF rules.



Thank you,



Martin & Thomas

bess chairs


--=_alternative 004F73D748257EF1_=
Content-Type: text/html; charset="US-ASCII"

<font size=2 face="sans-serif">Support.</font>
<br>
<br><font size=2 face="sans-serif">Ran Chen</font>
<br>
<br><font size=2 face="sans-serif"><br>
</font><tt><font size=3>-----Original Message-----<br>
<br>
From: Thomas Morin [</font></tt><a href=mailto:thomas.morin@orange.com><tt><font size=3>mailto:thomas.morin@orange.com</font></tt></a><tt><font size=3>]<br>
<br>
Sent: Thursday, October 22, 2015 8:31 AM<br>
<br>
To: bess@ietf.org<br>
<br>
Cc: draft-hao-bess-inter-nvo3-vpn-optionc@tools.ietf.org<br>
<br>
Subject: Poll for adoption: draft-hao-bess-inter-nvo3-vpn-optionc<br>
<br>
<br>
<br>
Hello working group,<br>
<br>
<br>
<br>
This email starts a two-week poll on adopting<br>
<br>
draft-hao-bess-inter-nvo3-vpn-optionc-03 [1] as a working group item.<br>
<br>
<br>
<br>
Please send comments to the list and state if you support adoption or not
(in the later case, please also state the reasons).<br>
<br>
<br>
<br>
This poll runs until **November 13th**.<br>
<br>
(3 weeks to account for the busy IETF week)<br>
<br>
<br>
<br>
<br>
<br>
*Coincidentally*, we are also polling for knowledge of any IPR that applies
to this draft, to ensure that IPR has been disclosed in compliance with
IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for more details).<br>
<br>
<br>
<br>
==&gt; *If* you are listed as a document author or contributor please respond
to this email and indicate whether or not you are aware of any relevant
IPR.<br>
<br>
<br>
<br>
The draft will not be adopted until a response has been received from each
author and contributor.<br>
<br>
<br>
<br>
If you are not listed as an author or contributor, then please explicitly
respond only if you are aware of any IPR that has not yet been disclosed
in conformance with IETF rules.<br>
<br>
<br>
<br>
Thank you,<br>
<br>
<br>
<br>
Martin &amp; Thomas<br>
<br>
bess chairs<br>
<br>
</font></tt>
--=_alternative 004F73D748257EF1_=--


From nobody Wed Nov  4 14:19:44 2015
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From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>
To: "Ali Sajassi (sajassi)" <sajassi@cisco.com>, "ssalam@cisco.com" <ssalam@cisco.com>, "dcai@cisco.com" <dcai@cisco.com>
Thread-Topic: Questions on draft-sajassi-bess-evpn-l3vpn-multihoming
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Cc: "bess@ietf.org" <bess@ietf.org>
Subject: [bess] Questions on draft-sajassi-bess-evpn-l3vpn-multihoming
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Hi,

I have a few questions:

   On the S-PEs, the pseudowires from the Access PEs are terminated onto
   VRFs, such that all pseudowires within a given redundancy set
   terminate on a single IP endpoint on the S-PEs. To achieve this, the
   S-PEs in a given Redundancy Group are configured with the same
   Anycast IP and MAC addresses on the virtual (sub)interface
   corresponding to the VRF termination point.

Is the virtual interface (like) an IRB interface?

   Since the S-PEs are running in EVPN single-active redundancy mode,
   the S-PEs would advertise an Ethernet AD route per vES with the
   single-active flag set per [RFC7432]. Since only the DF S-PE has its
   access pseudowire in Active state, only that device would establish
   an eBGP session with the CE and receive control and data traffic.

Will the IRB/virtual interface on a non-DF PE be up? I assume it is - even =
though the PW is not active. Would the non-DF PE keeps trying to establish =
the eBGP session with the CE? Would that cause issue to the session between=
 CE and the DF PE?

   The
   DF S-PE advertises host prefixes that it receives, from the CE over
   the eBGP session, to other PEs in the EVI using EVPN route type-5,
   with the proper ESI set. Remote PEs learn the host prefixes and
   associate them with the ESI, using the advertising PE as the next-hop
   for forwarding.

Would he DF S-PE advertise other prefixes received on the eBGP session? I a=
ssume so but the text only says host prefixes.

   Other S-PEs in the same Redundancy Group as the advertising PE will
   receive the same EVPN route type-5 advertisement, and will recognize
   the associated ESI as a locally attached vES.

What is the RT that limits the routes to be imported only the PEs in the sa=
me redundancy group? Is it that all PEs in the same EVPN instance will impo=
rt the routes? Or is it that different redundancy groups will have differen=
t EVPN instances? I assume it's latter (since we need one IRB interface for=
 each redundancy group?).

   The withdrawal of the Ethernet
   Segment route serves as an indication to the backup S-PE to go active
   (i.e. act as a backup DF), and activate its pseudowires to the Access
   PE. The withdrawal of the Ethernet A-D route triggers a "mass
   withdraw" on the remote PEs: these PEs adjust their next-hop
   associated with the prefixes that were originally advertised by the
   failed PE to point to the "backup path" per [RFC7432].

Can you elaborate the procedure for the PEs to adjust their next-hop?

I don't see reference to draft-ietf-bess-evpn-vpws. Is that used at all?

Thanks.
Jeffrey


From nobody Wed Nov  4 18:16:21 2015
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From: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
To: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "Samer Salam (ssalam)" <ssalam@cisco.com>, "Dennis Cai (dcai)" <dcai@cisco.com>
Thread-Topic: Questions on draft-sajassi-bess-evpn-l3vpn-multihoming
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Subject: Re: [bess] Questions on draft-sajassi-bess-evpn-l3vpn-multihoming
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Hi Jeffrey,


On 11/5/15, 7:19 AM, "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net> wrote:

>Hi,
>
>I have a few questions:
>
>   On the S-PEs, the pseudowires from the Access PEs are terminated onto
>   VRFs, such that all pseudowires within a given redundancy set
>   terminate on a single IP endpoint on the S-PEs. To achieve this, the
>   S-PEs in a given Redundancy Group are configured with the same
>   Anycast IP and MAC addresses on the virtual (sub)interface
>   corresponding to the VRF termination point.
>
>Is the virtual interface (like) an IRB interface?

No IRB interface in this case. This is the virtual interface/sub-interface
address.

>
>   Since the S-PEs are running in EVPN single-active redundancy mode,
>   the S-PEs would advertise an Ethernet AD route per vES with the
>   single-active flag set per [RFC7432]. Since only the DF S-PE has its
>   access pseudowire in Active state, only that device would establish
>   an eBGP session with the CE and receive control and data traffic.
>
>Will the IRB/virtual interface on a non-DF PE be up? I assume it is -
>even though the PW is not active. Would the non-DF PE keeps trying to
>establish the eBGP session with the CE? Would that cause issue to the
>session between CE and the DF PE?

The backup PW will be in stand-by mode (not up) and thus there won=B9t be a
eBGP session established between non-DF and the CE. Only when the non-DF
becomes DF, then eBGP session gets established.

>
>   The
>   DF S-PE advertises host prefixes that it receives, from the CE over
>   the eBGP session, to other PEs in the EVI using EVPN route type-5,
>   with the proper ESI set. Remote PEs learn the host prefixes and
>   associate them with the ESI, using the advertising PE as the next-hop
>   for forwarding.
>
>Would he DF S-PE advertise other prefixes received on the eBGP session? I
>assume so but the text only says host prefixes.

That=B9s Correct. There will be other prefixes. We=B9ll take care of it in =
the
next rev.

>
>   Other S-PEs in the same Redundancy Group as the advertising PE will
>   receive the same EVPN route type-5 advertisement, and will recognize
>   the associated ESI as a locally attached vES.
>
>What is the RT that limits the routes to be imported only the PEs in the
>same redundancy group? Is it that all PEs in the same EVPN instance will
>import the routes? Or is it that different redundancy groups will have
>different EVPN instances? I assume it's latter (since we need one IRB
>interface for each redundancy group?).

The RT will be the RT associated with the vES/ES.

>
>   The withdrawal of the Ethernet
>   Segment route serves as an indication to the backup S-PE to go active
>   (i.e. act as a backup DF), and activate its pseudowires to the Access
>   PE. The withdrawal of the Ethernet A-D route triggers a "mass
>   withdraw" on the remote PEs: these PEs adjust their next-hop
>   associated with the prefixes that were originally advertised by the
>   failed PE to point to the "backup path" per [RFC7432].
>
>Can you elaborate the procedure for the PEs to adjust their next-hop?

Please refer to sections 8.4 and 14.1.1.

>
>I don't see reference to draft-ietf-bess-evpn-vpws. Is that used at all?

Evpn-vpws is not used but it can be used to reduce the PW provisioning to
only single-side.

Cheers,
Ali

>
>Thanks.
>Jeffrey


From nobody Wed Nov  4 18:32:07 2015
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From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>
To: "Ali Sajassi (sajassi)" <sajassi@cisco.com>, "Samer Salam (ssalam)" <ssalam@cisco.com>, "Dennis Cai (dcai)" <dcai@cisco.com>
Thread-Topic: Questions on draft-sajassi-bess-evpn-l3vpn-multihoming
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Subject: Re: [bess] Questions on draft-sajassi-bess-evpn-l3vpn-multihoming
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Hi Ali,

> -----Original Message-----
> From: Ali Sajassi (sajassi) [mailto:sajassi@cisco.com]
> Sent: Thursday, November 05, 2015 11:16 AM
> To: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net>; Samer Salam (ssalam)
> <ssalam@cisco.com>; Dennis Cai (dcai) <dcai@cisco.com>
> Cc: bess@ietf.org
> Subject: Re: Questions on draft-sajassi-bess-evpn-l3vpn-multihoming
>=20
>=20
> Hi Jeffrey,
>=20
>=20
> On 11/5/15, 7:19 AM, "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net> wrote=
:
>=20
> >Hi,
> >
> >I have a few questions:
> >
> >   On the S-PEs, the pseudowires from the Access PEs are terminated onto
> >   VRFs, such that all pseudowires within a given redundancy set
> >   terminate on a single IP endpoint on the S-PEs. To achieve this, the
> >   S-PEs in a given Redundancy Group are configured with the same
> >   Anycast IP and MAC addresses on the virtual (sub)interface
> >   corresponding to the VRF termination point.
> >
> >Is the virtual interface (like) an IRB interface?
>=20
> No IRB interface in this case. This is the virtual interface/sub-interfac=
e
> address.
>=20
> >
> >   Since the S-PEs are running in EVPN single-active redundancy mode,
> >   the S-PEs would advertise an Ethernet AD route per vES with the
> >   single-active flag set per [RFC7432]. Since only the DF S-PE has its
> >   access pseudowire in Active state, only that device would establish
> >   an eBGP session with the CE and receive control and data traffic.
> >
> >Will the IRB/virtual interface on a non-DF PE be up? I assume it is -
> >even though the PW is not active. Would the non-DF PE keeps trying to
> >establish the eBGP session with the CE? Would that cause issue to the
> >session between CE and the DF PE?
>=20
> The backup PW will be in stand-by mode (not up) and thus there won=B9t be=
 a
> eBGP session established between non-DF and the CE. Only when the non-DF
> becomes DF, then eBGP session gets established.

Whether it is an IRB interface or not, is the interface considered up (at l=
ayer 3) when the PW is in the stand-by mode?
I understand that the EBGP session won't be established, but will the stand=
by PE try to establish it? Would that attempt cause trouble to the establis=
hed session (assuming the CE will get messages from the standby PE via the =
primary PE)?

>=20
> >
> >   The
> >   DF S-PE advertises host prefixes that it receives, from the CE over
> >   the eBGP session, to other PEs in the EVI using EVPN route type-5,
> >   with the proper ESI set. Remote PEs learn the host prefixes and
> >   associate them with the ESI, using the advertising PE as the next-hop
> >   for forwarding.
> >
> >Would he DF S-PE advertise other prefixes received on the eBGP session? =
I
> >assume so but the text only says host prefixes.
>=20
> That=B9s Correct. There will be other prefixes. We=B9ll take care of it i=
n the
> next rev.
>=20
> >
> >   Other S-PEs in the same Redundancy Group as the advertising PE will
> >   receive the same EVPN route type-5 advertisement, and will recognize
> >   the associated ESI as a locally attached vES.
> >
> >What is the RT that limits the routes to be imported only the PEs in the
> >same redundancy group? Is it that all PEs in the same EVPN instance will
> >import the routes? Or is it that different redundancy groups will have
> >different EVPN instances? I assume it's latter (since we need one IRB
> >interface for each redundancy group?).
>=20
> The RT will be the RT associated with the vES/ES.

Will the vES/ES belong to a single EVPN instance only?

>=20
> >
> >   The withdrawal of the Ethernet
> >   Segment route serves as an indication to the backup S-PE to go active
> >   (i.e. act as a backup DF), and activate its pseudowires to the Access
> >   PE. The withdrawal of the Ethernet A-D route triggers a "mass
> >   withdraw" on the remote PEs: these PEs adjust their next-hop
> >   associated with the prefixes that were originally advertised by the
> >   failed PE to point to the "backup path" per [RFC7432].
> >
> >Can you elaborate the procedure for the PEs to adjust their next-hop?
>=20
> Please refer to sections 8.4 and 14.1.1.

Part of my confusion came from the (wrong impression) that EVPN procedure i=
s also used between the APE and SPE (for vpws). Now that it is not the case=
, would the same concept in this draft apply even if the CE is connected vi=
a regular ACs?

Thanks.
Jeffrey

>=20
> >
> >I don't see reference to draft-ietf-bess-evpn-vpws. Is that used at all?
>=20
> Evpn-vpws is not used but it can be used to reduce the PW provisioning to
> only single-side.
>=20
> Cheers,
> Ali
>=20
> >
> >Thanks.
> >Jeffrey


From nobody Wed Nov  4 18:33:44 2015
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From: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
To: Haoweiguo <haoweiguo@huawei.com>
Thread-Topic: Comments on "draft-sajassi-bess-evpn-igmp-mld-proxy-00"
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Hi Weiguo,


From: Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>
Date: Thursday, October 22, 2015 at 2:17 AM
To: Cisco Employee <sajassi@cisco.com<mailto:sajassi@cisco.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: Comments on "draft-sajassi-bess-evpn-igmp-mld-proxy-00"


Hi Ali,

I have read through the draft, i think the procedures is fine for IGMP/MLD =
proxy. However, this draft doesn't consider multicast router scenario, bett=
er to be added.

Scenario 1:

         An EVPN PE acts as multicast router and runs PIM protocol with the=
 outside multicast routers.

Scenario 2:

         An EVPN PE connects to a multicast router on port1, no IGMP receiv=
er on the port.  The PE sends IGMP/MLD to the multicast router.



We have covered both scenarios. The first one is referred to as "distribute=
d anycast router"


In both scenarios, the EVPN PE should announce its role through the extende=
d route type6 to indicate it connects to a multicast router or acts as mult=
icast router itself.

Other EVPN PEs having local multicast source should forward the multicast t=
raffic to the PE announcing multicast router role, the PE announcing multic=
ast router role should not be pruned for all multicast traffic.

For the PE connecting to a multicast router, it should translate  EVPN rout=
e type-6 message to IGMP/MLD message, it's already described in your draft.=
 For the PE acting as multicast router, it should translate EVPN route type=
-6 message to PIM protocol, this part has not been covered in your draft, b=
etter to be added.

Correct, the mcast traffic treatment for inter-subnet is not described yet =
but we'll mention it in the next rev.

Cheers,
Ali



Thanks,

weiguo

--_000_D260ED5D15F560sajassiciscocom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space;">
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; color: rgb=
(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px;"><font col=
or=3D"#ff0000">Hi Weiguo,</font></div>
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; color: rgb=
(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; color: rgb=
(0, 0, 0);">
<br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"font-family: Calibri, sans-serif=
; font-size: 14px; color: rgb(0, 0, 0);">
<div style=3D"font-family:Lucida Grande; font-size:11pt; text-align:left; c=
olor:black; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-B=
OTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt =
solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>Haoweiguo &lt;<a href=3D"mail=
to:haoweiguo@huawei.com">haoweiguo@huawei.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Thursday, October 22, 2015 at=
 2:17 AM<br>
<span style=3D"font-weight:bold">To: </span>Cisco Employee &lt;<a href=3D"m=
ailto:sajassi@cisco.com">sajassi@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>&quot;<a href=3D"mailto:bess@ie=
tf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org">bess@i=
etf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Comments on &quot;draft-sa=
jassi-bess-evpn-igmp-mld-proxy-00&quot;<br>
</div>
<div><br>
</div>
<div dir=3D"ltr"><style id=3D"owaParaStyle">P {
	MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
</style>
<div fpstyle=3D"1" ocsi=3D"0">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">
<p><font size=3D"3" face=3D"Calibri">Hi Ali,</font></p>
<p><font size=3D"3" face=3D"Calibri">I have read through the draft, i think=
 the procedures is fine for IGMP/MLD proxy. However, this draft doesn't con=
sider multicast router scenario, better to be added.
</font></p>
<p><font size=3D"3" face=3D"Calibri">Scenario 1:</font></p>
<p><font size=3D"3" face=3D"Calibri">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; An EVPN PE acts as multicast router and runs PIM protocol with t=
he outside multicast routers.
</font></p>
<p><font size=3D"3" face=3D"Calibri">Scenario 2:</font></p>
<p><font size=3D"3" face=3D"Calibri">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; An EVPN PE connects to a multicast router on port1, no IGMP rece=
iver on the port.&nbsp;&nbsp;The PE sends IGMP/MLD to the multicast router.=
</font></p>
<p><font size=3D"3" face=3D"Calibri"></font>&nbsp;</p>
</div>
</div>
</div>
</span>
<div><font color=3D"#ff0000"><font face=3D"Calibri,sans-serif">We have cove=
red both scenarios. The first one is referred to as&nbsp;&#8220;distributed=
 anycast router&quot;</font></font></div>
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; color: rgb=
(0, 0, 0);">
<br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"font-family: Calibri, sans-serif=
; font-size: 14px; color: rgb(0, 0, 0);">
<div dir=3D"ltr">
<div fpstyle=3D"1" ocsi=3D"0">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">
<p><font size=3D"3"><font face=3D"Calibri">In both scenarios,&nbsp;the EVPN=
 PE should announce its role through the extended route type6 to indicate i=
t connects to a&nbsp;multicast router or acts as multicast router itself.</=
font></font></p>
</div>
</div>
</div>
</span>
<div>Other EVPN PEs having local multicast source should forward the multic=
ast traffic to the PE announcing multicast router role, the PE announcing m=
ulticast router role should not be pruned for all multicast traffic.</div>
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"font-family: Calibri, sans-serif=
; font-size: 14px; color: rgb(0, 0, 0);">
<div dir=3D"ltr">
<div fpstyle=3D"1" ocsi=3D"0">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;"><font size=3D"3">
<p><font face=3D"Calibri">For the PE connecting to a multicast router, it s=
hould translate&nbsp; EVPN route type-6 message to IGMP/MLD message, it's a=
lready described in your draft.
<font size=3D"3">For the PE acting as multicast router, it should translate=
 EVPN route type-6 message to PIM protocol, this part has not been covered =
in your draft, better to be added.</font></font></p>
</font></div>
</div>
</div>
</span>
<div><br>
</div>
<div><font color=3D"#ff0000">Correct, the mcast traffic treatment for inter=
-subnet is not described yet but we&#8217;ll mention it in the next rev.</f=
ont></div>
<div><font color=3D"#ff0000"><br>
</font></div>
<div><font color=3D"#ff0000">Cheers,</font></div>
<div><font color=3D"#ff0000">Ali</font></div>
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"font-family: Calibri, sans-serif=
; font-size: 14px; color: rgb(0, 0, 0);">
<div dir=3D"ltr">
<div fpstyle=3D"1" ocsi=3D"0">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;"><font size=3D"3">
<p><font face=3D"Calibri"></font>&nbsp;</p>
<p><font face=3D"Calibri">Thanks,</font></p>
<p><font face=3D"Calibri">weiguo</font></p>
</font></div>
</div>
</div>
</span>
</body>
</html>

--_000_D260ED5D15F560sajassiciscocom_--


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Subject: Re: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt
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From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt
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Subject: Re: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt
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From: Haoweiguo <haoweiguo@huawei.com>
To: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
Thread-Topic: Comments on "draft-sajassi-bess-evpn-igmp-mld-proxy-00"
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Date: Thu, 5 Nov 2015 05:54:09 +0000
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References: <DD5FC8DE455C3348B94340C0AB5517334F8D2D28@nkgeml501-mbs.china.huawei.com>,  <D260ED5D.15F560%sajassi@cisco.com>
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Subject: Re: [bess] Comments on "draft-sajassi-bess-evpn-igmp-mld-proxy-00"
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--_000_DD5FC8DE455C3348B94340C0AB5517334F8D61EAnkgeml501mbschi_
Content-Type: text/plain; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

Hi Ali,

Thanks for your reply. I think the 'distributd anycast multicast router' ma=
y not satisfy my requirements. In my discriptions, one multicast router is =
attached behind a EVPN PE or the multicast router also acts as an EVPN PE a=
t the same time,  the multicat router is centralized deployed. In this scen=
ario, one bit Flag as multicast router indicator is needed. The PE acting a=
s multicast router or with multicast router behind should announce the rout=
e type 6 message with the indicator flag marked. When other PEs with multic=
ast source behind receives the message,  when they inject local multicast t=
raffic to EVPN network, they will always send the traffic to the multicast =
router PE, the multicast traffic will never be pruned. If no this Flag, if =
the multicast router PE has no local IGMP/MLG receivers, the multicast traf=
fic from other PEs will never come to the multicast router PE.


I think your whole solution is good, it's easy to add this multicast router=
 Flag bit in route type-6 TLV.

Thanks,
weiguo
________________________________
From: Ali Sajassi (sajassi) [sajassi@cisco.com]
Sent: Thursday, November 05, 2015 10:33
To: Haoweiguo
Cc: bess@ietf.org
Subject: Re: Comments on "draft-sajassi-bess-evpn-igmp-mld-proxy-00"


Hi Weiguo,


From: Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>
Date: Thursday, October 22, 2015 at 2:17 AM
To: Cisco Employee <sajassi@cisco.com<mailto:sajassi@cisco.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: Comments on "draft-sajassi-bess-evpn-igmp-mld-proxy-00"


Hi Ali,

I have read through the draft, i think the procedures is fine for IGMP/MLD =
proxy. However, this draft doesn't consider multicast router scenario, bett=
er to be added.

Scenario 1:

         An EVPN PE acts as multicast router and runs PIM protocol with the=
 outside multicast routers.

Scenario 2:

         An EVPN PE connects to a multicast router on port1, no IGMP receiv=
er on the port.  The PE sends IGMP/MLD to the multicast router.



We have covered both scenarios. The first one is referred to as =93distribu=
ted anycast router"


In both scenarios, the EVPN PE should announce its role through the extende=
d route type6 to indicate it connects to a multicast router or acts as mult=
icast router itself.

Other EVPN PEs having local multicast source should forward the multicast t=
raffic to the PE announcing multicast router role, the PE announcing multic=
ast router role should not be pruned for all multicast traffic.

For the PE connecting to a multicast router, it should translate  EVPN rout=
e type-6 message to IGMP/MLD message, it's already described in your draft.=
 For the PE acting as multicast router, it should translate EVPN route type=
-6 message to PIM protocol, this part has not been covered in your draft, b=
etter to be added.

Correct, the mcast traffic treatment for inter-subnet is not described yet =
but we=92ll mention it in the next rev.

Cheers,
Ali



Thanks,

weiguo

--_000_DD5FC8DE455C3348B94340C0AB5517334F8D61EAnkgeml501mbschi_
Content-Type: text/html; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

<html dir=3D"ltr">
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
</head>
<body style=3D"WORD-WRAP: break-word" fPStyle=3D"1" ocsi=3D"0">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">
<p><font size=3D"3" face=3D"Calibri">Hi Ali,</font></p>
<p><font face=3D"Calibri"><font size=3D"3">Thanks for your reply. I think t=
he 'distributd anycast multicast router' may not satisfy my requirements. I=
n my discriptions, one multicast router is attached behind a EVPN PE or the=
 multicast router also acts as an EVPN
 PE at the same time,&nbsp; the multicat router is centralized deployed.&nb=
sp;In this scenario, one bit Flag as multicast router indicator is needed. =
T</font><span style=3D"FONT-SIZE: 14pt" lang=3D"EN-US"><font size=3D"3">he =
PE acting as multicast router or with multicast
 router behind should announce the route type 6 message with the indicator =
flag marked. When other PEs with multicast source behind receives the messa=
ge,&nbsp; when they inject local multicast traffic to EVPN network, they wi=
ll always send the traffic to the multicast
 router PE, the multicast traffic will never be pruned. If no this Flag, if=
 the multicast router PE has no local IGMP/MLG receivers, the multicast tra=
ffic from other PEs will never come to the multicast router PE.</font></spa=
n></font></p>
<p><font face=3D"Calibri"><span style=3D"FONT-SIZE: 14pt" lang=3D"EN-US"></=
span>&nbsp;</p>
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span style=3D"FONT-SI=
ZE: 14pt" lang=3D"EN-US"><font size=3D"3">I think your whole solution is go=
od, it's easy to add this multicast router Flag bit in route type-6 TLV.</f=
ont></span></p>
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span style=3D"FONT-SI=
ZE: 14pt" lang=3D"EN-US"><font size=3D"3"></font></span>&nbsp;</p>
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span style=3D"FONT-SI=
ZE: 14pt" lang=3D"EN-US"><font size=3D"3">Thanks,</font></span></p>
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span style=3D"FONT-SI=
ZE: 14pt" lang=3D"EN-US"><font size=3D"3">weiguo</font></span></p>
</font>
<div style=3D"FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px=
">
<hr tabindex=3D"-1">
<div style=3D"DIRECTION: ltr" id=3D"divRpF611075"><font color=3D"#000000" s=
ize=3D"2" face=3D"Tahoma"><b>From:</b> Ali Sajassi (sajassi) [sajassi@cisco=
.com]<br>
<b>Sent:</b> Thursday, November 05, 2015 10:33<br>
<b>To:</b> Haoweiguo<br>
<b>Cc:</b> bess@ietf.org<br>
<b>Subject:</b> Re: Comments on &quot;draft-sajassi-bess-evpn-igmp-mld-prox=
y-00&quot;<br>
</font><br>
</div>
<div></div>
<div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
<br>
</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; FONT-SIZE: 14px"><font color=
=3D"#ff0000">Hi Weiguo,</font></div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
<br>
</div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
<br>
</div>
<span style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZ=
E: 14px" id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"BORDER-BOTTOM: medium none; TEXT-ALIGN: left; BORDER-LEFT: me=
dium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; FONT=
-FAMILY: Lucida Grande; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #b5c4df =
1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"FONT-WEIGHT: bold">From: </span>Haoweiguo &lt;<a href=3D"mai=
lto:haoweiguo@huawei.com" target=3D"_blank">haoweiguo@huawei.com</a>&gt;<br=
>
<span style=3D"FONT-WEIGHT: bold">Date: </span>Thursday, October 22, 2015 a=
t 2:17 AM<br>
<span style=3D"FONT-WEIGHT: bold">To: </span>Cisco Employee &lt;<a href=3D"=
mailto:sajassi@cisco.com" target=3D"_blank">sajassi@cisco.com</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Cc: </span>&quot;<a href=3D"mailto:bess@i=
etf.org" target=3D"_blank">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:be=
ss@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Subject: </span>Comments on &quot;draft-s=
ajassi-bess-evpn-igmp-mld-proxy-00&quot;<br>
</div>
<div><br>
</div>
<div dir=3D"ltr"><style id=3D"owaParaStyle">P {
	MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
P {
	MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
</style>
<div>
<div style=3D"FONT-FAMILY: Tahoma; DIRECTION: ltr; COLOR: #000000; FONT-SIZ=
E: 10pt">
<p><font size=3D"3" face=3D"Calibri">Hi Ali,</font></p>
<p><font size=3D"3" face=3D"Calibri">I have read through the draft, i think=
 the procedures is fine for IGMP/MLD proxy. However, this draft doesn't con=
sider multicast router scenario, better to be added.
</font></p>
<p><font size=3D"3" face=3D"Calibri">Scenario 1:</font></p>
<p><font size=3D"3" face=3D"Calibri">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; An EVPN PE acts as multicast router and runs PIM protocol with t=
he outside multicast routers.
</font></p>
<p><font size=3D"3" face=3D"Calibri">Scenario 2:</font></p>
<p><font size=3D"3" face=3D"Calibri">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; An EVPN PE connects to a multicast router on port1, no IGMP rece=
iver on the port.&nbsp;&nbsp;The PE sends IGMP/MLD to the multicast router.=
</font></p>
<p><font size=3D"3" face=3D"Calibri"></font>&nbsp;</p>
</div>
</div>
</div>
</span>
<div><font color=3D"#ff0000"><font face=3D"Calibri,sans-serif">We have cove=
red both scenarios. The first one is referred to as&nbsp;=93distributed any=
cast router&quot;</font></font></div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZE=
: 14px">
<br>
</div>
<span style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZ=
E: 14px" id=3D"OLK_SRC_BODY_SECTION">
<div dir=3D"ltr">
<div>
<div style=3D"FONT-FAMILY: Tahoma; DIRECTION: ltr; COLOR: #000000; FONT-SIZ=
E: 10pt">
<p><font size=3D"3"><font face=3D"Calibri">In both scenarios,&nbsp;the EVPN=
 PE should announce its role through the extended route type6 to indicate i=
t connects to a&nbsp;multicast router or acts as multicast router itself.</=
font></font></p>
</div>
</div>
</div>
</span>
<div>Other EVPN PEs having local multicast source should forward the multic=
ast traffic to the PE announcing multicast router role, the PE announcing m=
ulticast router role should not be pruned for all multicast traffic.</div>
<span style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZ=
E: 14px" id=3D"OLK_SRC_BODY_SECTION">
<div dir=3D"ltr">
<div>
<div style=3D"FONT-FAMILY: Tahoma; DIRECTION: ltr; COLOR: #000000; FONT-SIZ=
E: 10pt">
<font size=3D"3">
<p><font face=3D"Calibri">For the PE connecting to a multicast router, it s=
hould translate&nbsp; EVPN route type-6 message to IGMP/MLD message, it's a=
lready described in your draft.
<font size=3D"3">For the PE acting as multicast router, it should translate=
 EVPN route type-6 message to PIM protocol, this part has not been covered =
in your draft, better to be added.</font></font></p>
</font></div>
</div>
</div>
</span>
<div><br>
</div>
<div><font color=3D"#ff0000">Correct, the mcast traffic treatment for inter=
-subnet is not described yet but we=92ll mention it in the next rev.</font>=
</div>
<div><font color=3D"#ff0000"><br>
</font></div>
<div><font color=3D"#ff0000">Cheers,</font></div>
<div><font color=3D"#ff0000">Ali</font></div>
<span style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: rgb(0,0,0); FONT-SIZ=
E: 14px" id=3D"OLK_SRC_BODY_SECTION">
<div dir=3D"ltr">
<div>
<div style=3D"FONT-FAMILY: Tahoma; DIRECTION: ltr; COLOR: #000000; FONT-SIZ=
E: 10pt">
<font size=3D"3">
<p><font face=3D"Calibri"></font>&nbsp;</p>
<p><font face=3D"Calibri">Thanks,</font></p>
<p><font face=3D"Calibri">weiguo</font></p>
</font></div>
</div>
</div>
</span></div>
</div>
</div>
</body>
</html>

--_000_DD5FC8DE455C3348B94340C0AB5517334F8D61EAnkgeml501mbschi_--


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Date: Thu, 05 Nov 2015 14:58:03 +0900
From: Wim Henderickx <wim.henderickx@gmail.com>
To: <bess@ietf.org>
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After clarification in the meeting I learned it is a requirement to select the same PE for upstream/downstream traffic.
My question is how is this done? Or better which mechanisms are used to achieve this?


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 in the meeting I learned it is a requirement to select the same PE for upst=
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "bess@ietf.org" <bess@ietf.org>
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From: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
To: Wim Henderickx <wim.henderickx@gmail.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt
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Subject: Re: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt
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Hi Wim,

If you can tell me what part of the draft is not clear, I will explain it h=
ere and if any further clarification in the draft needed, I will take care =
of it.

Cheers,
Ali

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of Wim Henderickx <wim.henderickx@gmail.com<mailto:wim.henderickx@gmail.com=
>>
Date: Wednesday, November 4, 2015 at 10:58 PM
To: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt

After clarification in the meeting I learned it is a requirement to select =
the same PE for upstream/downstream traffic.
My question is how is this done? Or better which mechanisms are used to ach=
ieve this?

--_000_D262E41315FD2Csajassiciscocom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div><br>
</div>
<div>Hi Wim,</div>
<div><br>
</div>
<div>If you can tell me what part of the draft is not clear, I will explain=
 it here and if any further clarification in the draft needed, I will take =
care of it.</div>
<div><br>
</div>
<div>Cheers,</div>
<div>Ali</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Lucida Grande; font-size:11pt; text-align:left; c=
olor:black; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-B=
OTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt =
solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>BESS &lt;<a href=3D"mailto:be=
ss-bounces@ietf.org">bess-bounces@ietf.org</a>&gt; on behalf of Wim Henderi=
ckx &lt;<a href=3D"mailto:wim.henderickx@gmail.com">wim.henderickx@gmail.co=
m</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Wednesday, November 4, 2015 a=
t 10:58 PM<br>
<span style=3D"font-weight:bold">To: </span>&quot;<a href=3D"mailto:bess@ie=
tf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org">bess@i=
etf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>[bess] draft-sajassi-bess-=
pbb-evpn-anycast-ip- tunnels-00.txt<br>
</div>
<div><br>
</div>
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<div>
<div>
<div>After clarification in the meeting I learned it is a requirement to se=
lect the same PE for upstream/downstream traffic.</div>
<div>My question is how is this done? Or better which mechanisms are used t=
o achieve this?</div>
<div>
<div id=3D"MAC_OUTLOOK_SIGNATURE"></div>
</div>
</div>
</div>
</div>
</div>
</span>
</body>
</html>

--_000_D262E41315FD2Csajassiciscocom_--


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From: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "Jakob Heitz (jheitz)" <jheitz@cisco.com>, "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt
Thread-Index: AQHRGKHvsn7Nr7mXNE68X02/uRPdZA==
Date: Fri, 6 Nov 2015 14:46:35 +0000
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Subject: Re: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt
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--_000_D262E78015FD83sajassiciscocom_
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Wim,
The draft currently assumes that all the S-PEs are EVPN PEs. However, the r=
emote S-PEs really don't have to be EVPN PEs. They can be IP-VPN PEs and we=
 can use evpn-ipvpn-interop draft for the interoperability between the two =
types. On the other hand, the S-PEs in the redundancy group have to be EVPN=
 PEs.

Now, regarding using local edge PIC on the SPEs, it doesn't give you the sy=
ch-up of prefixes for VRFs and ARP cache tables. We are talking about a sin=
gle BGP session between the CE and S-PEs. And upon failure, we are talking =
about non-stop forwarding with min. traffic disruption.

-Ali

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com<mailto:wim.he=
nderickx@alcatel-lucent.com>>
Date: Thursday, November 5, 2015 at 1:17 AM
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com<mailto:jheitz@cisco.com>>, "Je=
ffrey (Zhaohui) Zhang" <zzhang@juniper.net<mailto:zzhang@juniper.net>>, "be=
ss@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.org>>
Subject: Re: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

Jakob, thx this is clear.
What I see is that the benefits of ESI and Mass withdraw indication are als=
o solved based on implementation. By using PW/tunnel indications and local =
Edge PIC on the SPE connected to the access network can enable the same beh=
aviour with similar convergence results.


From: "Jakob Heitz (jheitz)" <jheitz@cisco.com<mailto:jheitz@cisco.com>>
Date: Thursday 5 November 2015 at 15:44
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net<mailto=
:zzhang@juniper.net>>, "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org=
<mailto:bess@ietf.org>>
Subject: RE: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

The point is that the CE does not realize that it is multihomed.
The access node implements the multihoming, but the CE has only one BGP ses=
sion and one interface.
The APE-SPE connections is an ethernet with the same ESI towards SPE1 and S=
PE2
The SPEs talk EVPN, using route type 5 to implement an L3VPN service.
This provides the ESI and mass withdrawal that RFC4364 routes do not.

--Jakob

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Wednesday, November 04, 2015 9:46 PM
To: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net<mailto:zzhang@juniper.net>>=
; bess@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

IF you do Edge-PIC this is optional afais.

From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net<mailto:zzhang@juniper.n=
et>>
Date: Thursday 5 November 2015 at 14:44
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org=
<mailto:bess@ietf.org>>
Subject: RE: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

My understanding is that an IP-VPN PE would not be able take advantage of "=
mass-withdraw"?

From: Henderickx, Wim (Wim) [mailto:wim.henderickx@alcatel-lucent.com]
Sent: Thursday, November 05, 2015 2:42 PM
To: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net<mailto:zzhang@juniper.net>>=
; bess@ietf.org<mailto:bess@ietf.org>
Subject: Re: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

Is the draft assuming also IP-VPN in the core or only EVPN?
I don't see a reason for excluding one or another

From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net<mailto:zzhang@juniper.n=
et>>
Date: Thursday 5 November 2015 at 14:40
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org=
<mailto:bess@ietf.org>>
Subject: RE: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

I did not get that either until Ali confirmed that in the meeting.

I had thought that SPEs were running regular L3VPN (not EVPN) but the ones =
that a CE multi-home to would also use EVPN procedures. Now it looks like t=
here is no "regular" L3VPN - everything is EVPN.

Jeffrey

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Thursday, November 05, 2015 2:25 PM
To: bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

Maybe good to clarify in this draft which nodes are involved in EVPN from t=
he drawing on p3 in https://www.ietf.org/proceedings/94/slides/slides-94-be=
ss-11.pdf?
Did I understood correctly in the meeting that this is required between all=
 SPE(s), if so why?


--_000_D262E78015FD83sajassiciscocom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div><br>
</div>
<div>Wim, &nbsp;</div>
<div>The draft currently assumes that all the S-PEs are EVPN PEs. However, =
the remote S-PEs really don&#8217;t have to be EVPN PEs. They can be IP-VPN=
 PEs and we can use evpn-ipvpn-interop draft for the interoperability betwe=
en the two types. On the other hand, the
 S-PEs in the redundancy group have to be EVPN PEs.&nbsp;</div>
<div><br>
</div>
<div>Now, regarding using local edge PIC on the SPEs, it doesn&#8217;t give=
 you the sych-up of prefixes for VRFs and ARP cache tables. We are talking =
about a single BGP session between the CE and S-PEs. And upon failure, we a=
re talking about non-stop forwarding with
 min. traffic disruption.&nbsp;</div>
<div><br>
</div>
<div>-Ali</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Lucida Grande; font-size:11pt; text-align:left; c=
olor:black; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-B=
OTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt =
solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>BESS &lt;<a href=3D"mailto:be=
ss-bounces@ietf.org">bess-bounces@ietf.org</a>&gt; on behalf of &quot;Hende=
rickx, Wim (Wim)&quot; &lt;<a href=3D"mailto:wim.henderickx@alcatel-lucent.=
com">wim.henderickx@alcatel-lucent.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Thursday, November 5, 2015 at=
 1:17 AM<br>
<span style=3D"font-weight:bold">To: </span>&quot;Jakob Heitz (jheitz)&quot=
; &lt;<a href=3D"mailto:jheitz@cisco.com">jheitz@cisco.com</a>&gt;, &quot;J=
effrey (Zhaohui) Zhang&quot; &lt;<a href=3D"mailto:zzhang@juniper.net">zzha=
ng@juniper.net</a>&gt;, &quot;<a href=3D"mailto:bess@ietf.org">bess@ietf.or=
g</a>&quot;
 &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [bess] draft-sajassi-b=
ess-evpn-l3vpn- multihoming-00.txt<br>
</div>
<div><br>
</div>
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<div>
<div>Jakob, thx this is clear.</div>
<div>What I see is that the benefits of ESI and Mass withdraw indication ar=
e also solved based on implementation. By using PW/tunnel indications and l=
ocal Edge PIC on the SPE connected to the access network can enable the sam=
e behaviour with similar convergence
 results.</div>
<div><br>
</div>
<div>
<div id=3D"MAC_OUTLOOK_SIGNATURE"></div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:12pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>&quot;Jakob Heitz (jheitz)&qu=
ot; &lt;<a href=3D"mailto:jheitz@cisco.com">jheitz@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Thursday 5 November 2015 at 1=
5:44<br>
<span style=3D"font-weight:bold">To: </span>Wim Henderickx &lt;<a href=3D"m=
ailto:wim.henderickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com<=
/a>&gt;, &quot;Jeffrey (Zhaohui) Zhang&quot; &lt;<a href=3D"mailto:zzhang@j=
uniper.net">zzhang@juniper.net</a>&gt;, &quot;<a href=3D"mailto:bess@ietf.o=
rg">bess@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>RE: draft-sajassi-bess-evp=
n-l3vpn- multihoming-00.txt<br>
</div>
<div><br>
</div>
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size: 8pt; font-family: 'Lucida =
Console'; color: rgb(112, 48, 160);">The point is that the CE does not real=
ize that it is multihomed.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 8pt; font-family: 'Lucida =
Console'; color: rgb(112, 48, 160);">The access node implements the multiho=
ming, but the CE has only one BGP session and one interface.<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 8pt; font-family: 'Lucida =
Console'; color: rgb(112, 48, 160);">The APE-SPE connections is an ethernet=
 with the same ESI towards SPE1 and SPE2<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 8pt; font-family: 'Lucida =
Console'; color: rgb(112, 48, 160);">The SPEs talk EVPN, using route type 5=
 to implement an L3VPN service.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 8pt; font-family: 'Lucida =
Console'; color: rgb(112, 48, 160);">This provides the ESI and mass withdra=
wal that RFC4364 routes do not.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 8pt; font-family: 'Lucida =
Console'; color: rgb(112, 48, 160);"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(112, 48, 160);">--Jakob<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size: 8pt; font-family: 'Lucida =
Console'; color: rgb(112, 48, 160);"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size: 11pt; font-family: Cali=
bri, sans-serif;">From:</span></b><span style=3D"font-size: 11pt; font-fami=
ly: Calibri, sans-serif;"> BESS [<a href=3D"mailto:bess-bounces@ietf.org">m=
ailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
<b>Sent:</b> Wednesday, November 04, 2015 9:46 PM<br>
<b>To:</b> Jeffrey (Zhaohui) Zhang &lt;<a href=3D"mailto:zzhang@juniper.net=
">zzhang@juniper.net</a>&gt;;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.tx=
t<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">IF you do Edge-PIC this is optional afais.<o=
:p></o:p></span></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family: Calibri, sans-serif; =
color: black;">From:
</span></b><span style=3D"font-family: Calibri, sans-serif; color: black;">=
&quot;Jeffrey (Zhaohui) Zhang&quot; &lt;<a href=3D"mailto:zzhang@juniper.ne=
t">zzhang@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday 5 November 2015 at 14:44<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com">wim.henderickx@alcatel-lucent.com</a>&gt;, &quot;<a href=3D"mailto:=
bess@ietf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org"=
>bess@ietf.org</a>&gt;<br>
<b>Subject: </b>RE: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt<o:p><=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">My understanding is that an IP-VPN =
PE would not be able take advantage of &#8220;mass-withdraw&#8221;?</span><=
span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"font-size=
: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">&nbsp;<=
/span></a><span style=3D"color:black"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size: 11pt; font-family: Cali=
bri, sans-serif; color: black;">From:</span></b><span style=3D"font-size: 1=
1pt; font-family: Calibri, sans-serif; color: black;"> Henderickx, Wim (Wim=
) [<a href=3D"mailto:wim.henderickx@alcatel-lucent.com">mailto:wim.henderic=
kx@alcatel-lucent.com</a>]
<br>
<b>Sent:</b> Thursday, November 05, 2015 2:42 PM<br>
<b>To:</b> Jeffrey (Zhaohui) Zhang &lt;<a href=3D"mailto:zzhang@juniper.net=
">zzhang@juniper.net</a>&gt;;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt</span=
><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">Is the draft assuming also IP-VPN in the cor=
e or only EVPN?</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">I don&#8217;t see a reason for excluding one=
 or another</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">&nbsp;</span><span style=3D"color:black"><o:=
p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family: Calibri, sans-serif; =
color: black;">From:
</span></b><span style=3D"font-family: Calibri, sans-serif; color: black;">=
&quot;Jeffrey (Zhaohui) Zhang&quot; &lt;<a href=3D"mailto:zzhang@juniper.ne=
t">zzhang@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday 5 November 2015 at 14:40<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com">wim.henderickx@alcatel-lucent.com</a>&gt;, &quot;<a href=3D"mailto:=
bess@ietf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org"=
>bess@ietf.org</a>&gt;<br>
<b>Subject: </b>RE: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt</span=
><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">&nbsp;</span><span style=3D"color:black"><o:=
p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">I did not get that either until Ali=
 confirmed that in the meeting.</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">I had thought that SPEs were runnin=
g regular L3VPN (not EVPN) but the ones that a CE multi-home to would also =
use EVPN procedures. Now it looks like
 there is no &#8220;regular&#8221; L3VPN &#8211; everything is EVPN.</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">Jeffrey</span><span style=3D"color:=
black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size: 11pt; font-family: Cali=
bri, sans-serif; color: black;">From:</span></b><span style=3D"font-size: 1=
1pt; font-family: Calibri, sans-serif; color: black;"> BESS [<a href=3D"mai=
lto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
<b>Sent:</b> Thursday, November 05, 2015 2:25 PM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">Maybe good to clarify in this draft which no=
des are involved in EVPN from the drawing on p3 in
<a href=3D"https://www.ietf.org/proceedings/94/slides/slides-94-bess-11.pdf=
">https://www.ietf.org/proceedings/94/slides/slides-94-bess-11.pdf</a>?</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">Did I understood correctly in the meeting th=
at this is required between all SPE(s), if so why?</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">&nbsp;</span><span style=3D"color:black"><o:=
p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</span></div>
</div>
</span>
</body>
</html>

--_000_D262E78015FD83sajassiciscocom_--


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From: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>
To: "Ali Sajassi (sajassi)" <sajassi@cisco.com>, "Jakob Heitz (jheitz)" <jheitz@cisco.com>, "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt
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From: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "Jakob Heitz (jheitz)" <jheitz@cisco.com>, "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt
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We=92ll do.

From: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com<mailto:wim=
.henderickx@alcatel-lucent.com>>
Date: Friday, November 6, 2015 at 8:43 AM
To: Cisco Employee <sajassi@cisco.com<mailto:sajassi@cisco.com>>, "Jakob He=
itz (jheitz)" <jheitz@cisco.com<mailto:jheitz@cisco.com>>, "Jeffrey (Zhaohu=
i) Zhang" <zzhang@juniper.net<mailto:zzhang@juniper.net>>, "bess@ietf.org<m=
ailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.org>>
Subject: Re: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

Ali, ok I see the ARP cache sync and customer route sync is a benefit. Mayb=
e we should make this clearer in the draft.

From: Ali Sajassi <sajassi@cisco.com<mailto:sajassi@cisco.com>>
Date: Friday 6 November 2015 at 15:46
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, "Jakob Heitz (jheitz)" <jheitz@cisco.com<mailto:jhei=
tz@cisco.com>>, "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net<mailto:zzhang=
@juniper.net>>, "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto=
:bess@ietf.org>>
Subject: Re: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt


Wim,
The draft currently assumes that all the S-PEs are EVPN PEs. However, the r=
emote S-PEs really don=92t have to be EVPN PEs. They can be IP-VPN PEs and =
we can use evpn-ipvpn-interop draft for the interoperability between the tw=
o types. On the other hand, the S-PEs in the redundancy group have to be EV=
PN PEs.

Now, regarding using local edge PIC on the SPEs, it doesn=92t give you the =
sych-up of prefixes for VRFs and ARP cache tables. We are talking about a s=
ingle BGP session between the CE and S-PEs. And upon failure, we are talkin=
g about non-stop forwarding with min. traffic disruption.

-Ali

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com<mailto:wim.he=
nderickx@alcatel-lucent.com>>
Date: Thursday, November 5, 2015 at 1:17 AM
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com<mailto:jheitz@cisco.com>>, "Je=
ffrey (Zhaohui) Zhang" <zzhang@juniper.net<mailto:zzhang@juniper.net>>, "be=
ss@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.org>>
Subject: Re: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

Jakob, thx this is clear.
What I see is that the benefits of ESI and Mass withdraw indication are als=
o solved based on implementation. By using PW/tunnel indications and local =
Edge PIC on the SPE connected to the access network can enable the same beh=
aviour with similar convergence results.


From: "Jakob Heitz (jheitz)" <jheitz@cisco.com<mailto:jheitz@cisco.com>>
Date: Thursday 5 November 2015 at 15:44
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net<mailto=
:zzhang@juniper.net>>, "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org=
<mailto:bess@ietf.org>>
Subject: RE: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

The point is that the CE does not realize that it is multihomed.
The access node implements the multihoming, but the CE has only one BGP ses=
sion and one interface.
The APE-SPE connections is an ethernet with the same ESI towards SPE1 and S=
PE2
The SPEs talk EVPN, using route type 5 to implement an L3VPN service.
This provides the ESI and mass withdrawal that RFC4364 routes do not.

--Jakob

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Wednesday, November 04, 2015 9:46 PM
To: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net<mailto:zzhang@juniper.net>>=
; bess@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

IF you do Edge-PIC this is optional afais.

From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net<mailto:zzhang@juniper.n=
et>>
Date: Thursday 5 November 2015 at 14:44
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org=
<mailto:bess@ietf.org>>
Subject: RE: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

My understanding is that an IP-VPN PE would not be able take advantage of =
=93mass-withdraw=94?

From: Henderickx, Wim (Wim) [mailto:wim.henderickx@alcatel-lucent.com]
Sent: Thursday, November 05, 2015 2:42 PM
To: Jeffrey (Zhaohui) Zhang <zzhang@juniper.net<mailto:zzhang@juniper.net>>=
; bess@ietf.org<mailto:bess@ietf.org>
Subject: Re: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

Is the draft assuming also IP-VPN in the core or only EVPN?
I don=92t see a reason for excluding one or another

From: "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net<mailto:zzhang@juniper.n=
et>>
Date: Thursday 5 November 2015 at 14:40
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org=
<mailto:bess@ietf.org>>
Subject: RE: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

I did not get that either until Ali confirmed that in the meeting.

I had thought that SPEs were running regular L3VPN (not EVPN) but the ones =
that a CE multi-home to would also use EVPN procedures. Now it looks like t=
here is no =93regular=94 L3VPN =96 everything is EVPN.

Jeffrey

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Thursday, November 05, 2015 2:25 PM
To: bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt

Maybe good to clarify in this draft which nodes are involved in EVPN from t=
he drawing on p3 in https://www.ietf.org/proceedings/94/slides/slides-94-be=
ss-11.pdf?
Did I understood correctly in the meeting that this is required between all=
 SPE(s), if so why?


--_000_D2636E72160084sajassiciscocom_
Content-Type: text/html; charset="Windows-1252"
Content-ID: <704EB74F67ACB6459525A64C6C2791FE@emea.cisco.com>
Content-Transfer-Encoding: quoted-printable

<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div><br>
</div>
<div>We=92ll do.</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Lucida Grande; font-size:11pt; text-align:left; c=
olor:black; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-B=
OTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt =
solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>&quot;Henderickx, Wim (Wim)&q=
uot; &lt;<a href=3D"mailto:wim.henderickx@alcatel-lucent.com">wim.henderick=
x@alcatel-lucent.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Friday, November 6, 2015 at 8=
:43 AM<br>
<span style=3D"font-weight:bold">To: </span>Cisco Employee &lt;<a href=3D"m=
ailto:sajassi@cisco.com">sajassi@cisco.com</a>&gt;, &quot;Jakob Heitz (jhei=
tz)&quot; &lt;<a href=3D"mailto:jheitz@cisco.com">jheitz@cisco.com</a>&gt;,=
 &quot;Jeffrey (Zhaohui) Zhang&quot; &lt;<a href=3D"mailto:zzhang@juniper.n=
et">zzhang@juniper.net</a>&gt;,
 &quot;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [bess] draft-sajassi-b=
ess-evpn-l3vpn- multihoming-00.txt<br>
</div>
<div><br>
</div>
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<div>
<div>
<div>Ali, ok I see the ARP cache sync and customer route sync is a benefit.=
 Maybe we should make this clearer in the draft.</div>
<div>
<div id=3D"MAC_OUTLOOK_SIGNATURE"></div>
</div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:12pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>Ali Sajassi &lt;<a href=3D"ma=
ilto:sajassi@cisco.com">sajassi@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Friday 6 November 2015 at 15:=
46<br>
<span style=3D"font-weight:bold">To: </span>Wim Henderickx &lt;<a href=3D"m=
ailto:wim.henderickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com<=
/a>&gt;, &quot;Jakob Heitz (jheitz)&quot; &lt;<a href=3D"mailto:jheitz@cisc=
o.com">jheitz@cisco.com</a>&gt;, &quot;Jeffrey (Zhaohui) Zhang&quot; &lt;<a=
 href=3D"mailto:zzhang@juniper.net">zzhang@juniper.net</a>&gt;,
 &quot;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [bess] draft-sajassi-b=
ess-evpn-l3vpn- multihoming-00.txt<br>
</div>
<div><br>
</div>
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<div><br>
</div>
<div>Wim, &nbsp;</div>
<div>The draft currently assumes that all the S-PEs are EVPN PEs. However, =
the remote S-PEs really don=92t have to be EVPN PEs. They can be IP-VPN PEs=
 and we can use evpn-ipvpn-interop draft for the interoperability between t=
he two types. On the other hand, the
 S-PEs in the redundancy group have to be EVPN PEs.&nbsp;</div>
<div><br>
</div>
<div>Now, regarding using local edge PIC on the SPEs, it doesn=92t give you=
 the sych-up of prefixes for VRFs and ARP cache tables. We are talking abou=
t a single BGP session between the CE and S-PEs. And upon failure, we are t=
alking about non-stop forwarding with
 min. traffic disruption.&nbsp;</div>
<div><br>
</div>
<div>-Ali</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Lucida Grande; font-size:11pt; text-align:left; c=
olor:black; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-B=
OTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt =
solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>BESS &lt;<a href=3D"mailto:be=
ss-bounces@ietf.org">bess-bounces@ietf.org</a>&gt; on behalf of &quot;Hende=
rickx, Wim (Wim)&quot; &lt;<a href=3D"mailto:wim.henderickx@alcatel-lucent.=
com">wim.henderickx@alcatel-lucent.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Thursday, November 5, 2015 at=
 1:17 AM<br>
<span style=3D"font-weight:bold">To: </span>&quot;Jakob Heitz (jheitz)&quot=
; &lt;<a href=3D"mailto:jheitz@cisco.com">jheitz@cisco.com</a>&gt;, &quot;J=
effrey (Zhaohui) Zhang&quot; &lt;<a href=3D"mailto:zzhang@juniper.net">zzha=
ng@juniper.net</a>&gt;, &quot;<a href=3D"mailto:bess@ietf.org">bess@ietf.or=
g</a>&quot;
 &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [bess] draft-sajassi-b=
ess-evpn-l3vpn- multihoming-00.txt<br>
</div>
<div><br>
</div>
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<div>
<div>Jakob, thx this is clear.</div>
<div>What I see is that the benefits of ESI and Mass withdraw indication ar=
e also solved based on implementation. By using PW/tunnel indications and l=
ocal Edge PIC on the SPE connected to the access network can enable the sam=
e behaviour with similar convergence
 results.</div>
<div><br>
</div>
<div>
<div id=3D""></div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:12pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>&quot;Jakob Heitz (jheitz)&qu=
ot; &lt;<a href=3D"mailto:jheitz@cisco.com">jheitz@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Thursday 5 November 2015 at 1=
5:44<br>
<span style=3D"font-weight:bold">To: </span>Wim Henderickx &lt;<a href=3D"m=
ailto:wim.henderickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com<=
/a>&gt;, &quot;Jeffrey (Zhaohui) Zhang&quot; &lt;<a href=3D"mailto:zzhang@j=
uniper.net">zzhang@juniper.net</a>&gt;, &quot;<a href=3D"mailto:bess@ietf.o=
rg">bess@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>RE: draft-sajassi-bess-evp=
n-l3vpn- multihoming-00.txt<br>
</div>
<div><br>
</div>
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<div lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size: 8pt; font-family: 'Lucida =
Console'; color: rgb(112, 48, 160);">The point is that the CE does not real=
ize that it is multihomed.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 8pt; font-family: 'Lucida =
Console'; color: rgb(112, 48, 160);">The access node implements the multiho=
ming, but the CE has only one BGP session and one interface.<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 8pt; font-family: 'Lucida =
Console'; color: rgb(112, 48, 160);">The APE-SPE connections is an ethernet=
 with the same ESI towards SPE1 and SPE2<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 8pt; font-family: 'Lucida =
Console'; color: rgb(112, 48, 160);">The SPEs talk EVPN, using route type 5=
 to implement an L3VPN service.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 8pt; font-family: 'Lucida =
Console'; color: rgb(112, 48, 160);">This provides the ESI and mass withdra=
wal that RFC4364 routes do not.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 8pt; font-family: 'Lucida =
Console'; color: rgb(112, 48, 160);"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(112, 48, 160);">--Jakob<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size: 8pt; font-family: 'Lucida =
Console'; color: rgb(112, 48, 160);"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size: 11pt; font-family: Cali=
bri, sans-serif;">From:</span></b><span style=3D"font-size: 11pt; font-fami=
ly: Calibri, sans-serif;"> BESS [<a href=3D"mailto:bess-bounces@ietf.org">m=
ailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
<b>Sent:</b> Wednesday, November 04, 2015 9:46 PM<br>
<b>To:</b> Jeffrey (Zhaohui) Zhang &lt;<a href=3D"mailto:zzhang@juniper.net=
">zzhang@juniper.net</a>&gt;;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.tx=
t<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">IF you do Edge-PIC this is optional afais.<o=
:p></o:p></span></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family: Calibri, sans-serif; =
color: black;">From:
</span></b><span style=3D"font-family: Calibri, sans-serif; color: black;">=
&quot;Jeffrey (Zhaohui) Zhang&quot; &lt;<a href=3D"mailto:zzhang@juniper.ne=
t">zzhang@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday 5 November 2015 at 14:44<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com">wim.henderickx@alcatel-lucent.com</a>&gt;, &quot;<a href=3D"mailto:=
bess@ietf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org"=
>bess@ietf.org</a>&gt;<br>
<b>Subject: </b>RE: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt<o:p><=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">My understanding is that an IP-VPN =
PE would not be able take advantage of =93mass-withdraw=94?</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"font-size=
: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">&nbsp;<=
/span></a><span style=3D"color:black"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size: 11pt; font-family: Cali=
bri, sans-serif; color: black;">From:</span></b><span style=3D"font-size: 1=
1pt; font-family: Calibri, sans-serif; color: black;"> Henderickx, Wim (Wim=
) [<a href=3D"mailto:wim.henderickx@alcatel-lucent.com">mailto:wim.henderic=
kx@alcatel-lucent.com</a>]
<br>
<b>Sent:</b> Thursday, November 05, 2015 2:42 PM<br>
<b>To:</b> Jeffrey (Zhaohui) Zhang &lt;<a href=3D"mailto:zzhang@juniper.net=
">zzhang@juniper.net</a>&gt;;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt</span=
><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">Is the draft assuming also IP-VPN in the cor=
e or only EVPN?</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">I don=92t see a reason for excluding one or =
another</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">&nbsp;</span><span style=3D"color:black"><o:=
p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family: Calibri, sans-serif; =
color: black;">From:
</span></b><span style=3D"font-family: Calibri, sans-serif; color: black;">=
&quot;Jeffrey (Zhaohui) Zhang&quot; &lt;<a href=3D"mailto:zzhang@juniper.ne=
t">zzhang@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday 5 November 2015 at 14:40<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com">wim.henderickx@alcatel-lucent.com</a>&gt;, &quot;<a href=3D"mailto:=
bess@ietf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org"=
>bess@ietf.org</a>&gt;<br>
<b>Subject: </b>RE: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt</span=
><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">&nbsp;</span><span style=3D"color:black"><o:=
p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">I did not get that either until Ali=
 confirmed that in the meeting.</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">I had thought that SPEs were runnin=
g regular L3VPN (not EVPN) but the ones that a CE multi-home to would also =
use EVPN procedures. Now it looks like
 there is no =93regular=94 L3VPN =96 everything is EVPN.</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">Jeffrey</span><span style=3D"color:=
black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt; font-family: Calibri=
, sans-serif; color: rgb(31, 73, 125);">&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size: 11pt; font-family: Cali=
bri, sans-serif; color: black;">From:</span></b><span style=3D"font-size: 1=
1pt; font-family: Calibri, sans-serif; color: black;"> BESS [<a href=3D"mai=
lto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
<b>Sent:</b> Thursday, November 05, 2015 2:25 PM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">Maybe good to clarify in this draft which no=
des are involved in EVPN from the drawing on p3 in
<a href=3D"https://www.ietf.org/proceedings/94/slides/slides-94-bess-11.pdf=
">https://www.ietf.org/proceedings/94/slides/slides-94-bess-11.pdf</a>?</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">Did I understood correctly in the meeting th=
at this is required between all SPE(s), if so why?</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: Calib=
ri, sans-serif; color: black;">&nbsp;</span><span style=3D"color:black"><o:=
p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</span></div>
</div>
</span></div>
</div>
</span></div>
</div>
</span>
</body>
</html>

--_000_D2636E72160084sajassiciscocom_--


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Date: Sat, 07 Nov 2015 11:10:06 +0100
From: Wim Henderickx <wim.henderickx@gmail.com>
To: "Ali Sajassi (sajassi)" <sajassi@cisco.com>, "bess@ietf.org" <bess@ietf.org>
Message-ID: <E4C8E983-FF6B-4EB4-AA51-F7C6D9A4A115@gmail.com>
Thread-Topic: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt
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Subject: Re: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt
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First if this is a  requirement it should be listed in section 2.

For known unicast traffic the document describes a upstream hash function i=
n section 4.2.1.
For BUM traffic It describes the SHG/DF procedures but there is no guarante=
e described that the downstream DF is similar to the upstream hash or IGP di=
stance in case of unequal cost. As such I don=E2=80=99t see how for BUM traffic th=
e consistency between upstream and downstream is guaranteed? (section 4.2.2.=
)

From:  Ali Sajassi <sajassi@cisco.com>
Date:  Friday 6 November 2015 at 15:14
To:  Wim Henderickx <wim.henderickx@gmail.com>, "bess@ietf.org" <bess@ietf.=
org>
Subject:  Re: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt


Hi Wim,

If you can tell me what part of the draft is not clear, I will explain it h=
ere and if any further clarification in the draft needed, I will take care o=
f it.

Cheers,
Ali

From: BESS <bess-bounces@ietf.org> on behalf of Wim Henderickx <wim.henderi=
ckx@gmail.com>
Date: Wednesday, November 4, 2015 at 10:58 PM
To: "bess@ietf.org" <bess@ietf.org>
Subject: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt

After clarification in the meeting I learned it is a requirement to select =
the same PE for upstream/downstream traffic.
My question is how is this done? Or better which mechanisms are used to ach=
ieve this?


--B_3529739407_265376338
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	charset="UTF-8"
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<html><head></head><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: s=
pace; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size:=
 14px; font-family: Calibri, sans-serif;"><div><div>First if this is a &nbsp=
;requirement it should be listed in section 2.</div><div><br></div><div>For =
known unicast traffic the document describes a upstream hash function in sec=
tion 4.2.1.</div><div>For BUM traffic It describes the SHG/DF procedures but=
 there is no guarantee described that the downstream DF is similar to the up=
stream hash or IGP distance in case of unequal cost. As such I don&#8217;t s=
ee how for BUM traffic the consistency between upstream and downstream is gu=
aranteed? (section 4.2.2.)</div><div><div id=3D"MAC_OUTLOOK_SIGNATURE"></div><=
/div></div><div><br></div><span id=3D"OLK_SRC_BODY_SECTION"><div style=3D"font-f=
amily:Calibri; font-size:12pt; text-align:left; color:black; BORDER-BOTTOM: =
medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0i=
n; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium n=
one; PADDING-TOP: 3pt"><span style=3D"font-weight:bold">From: </span> Ali Saja=
ssi &lt;<a href=3D"mailto:sajassi@cisco.com">sajassi@cisco.com</a>&gt;<br><spa=
n style=3D"font-weight:bold">Date: </span> Friday 6 November 2015 at 15:14<br>=
<span style=3D"font-weight:bold">To: </span> Wim Henderickx &lt;<a href=3D"mailt=
o:wim.henderickx@gmail.com">wim.henderickx@gmail.com</a>&gt;, "<a href=3D"mail=
to:bess@ietf.org">bess@ietf.org</a>" &lt;<a href=3D"mailto:bess@ietf.org">bess=
@ietf.org</a>&gt;<br><span style=3D"font-weight:bold">Subject: </span> Re: [be=
ss] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt<br></div><div><br=
></div><div><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-a=
scii"><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-l=
ine-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fam=
ily: Calibri, sans-serif;"><div><br></div><div>Hi Wim,</div><div><br></div><=
div>If you can tell me what part of the draft is not clear, I will explain i=
t here and if any further clarification in the draft needed, I will take car=
e of it.</div><div><br></div><div>Cheers,</div><div>Ali</div><div><br></div>=
<span id=3D"OLK_SRC_BODY_SECTION"><div style=3D"font-family:Lucida Grande; font-=
size:11pt; text-align:left; color:black; BORDER-BOTTOM: medium none; BORDER-=
LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0i=
n; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3p=
t"><span style=3D"font-weight:bold">From: </span>BESS &lt;<a href=3D"mailto:bess=
-bounces@ietf.org">bess-bounces@ietf.org</a>&gt; on behalf of Wim Henderickx=
 &lt;<a href=3D"mailto:wim.henderickx@gmail.com">wim.henderickx@gmail.com</a>&=
gt;<br><span style=3D"font-weight:bold">Date: </span>Wednesday, November 4, 20=
15 at 10:58 PM<br><span style=3D"font-weight:bold">To: </span>"<a href=3D"mailto=
:bess@ietf.org">bess@ietf.org</a>" &lt;<a href=3D"mailto:bess@ietf.org">bess@i=
etf.org</a>&gt;<br><span style=3D"font-weight:bold">Subject: </span>[bess] dra=
ft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt<br></div><div><br></div>=
<div><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-li=
ne-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;"><div><div><div>After clarification in the meeting =
I learned it is a requirement to select the same PE for upstream/downstream =
traffic.</div><div>My question is how is this done? Or better which mechanis=
ms are used to achieve this?</div><div><div id=3D""></div></div></div></div></=
div></div></span></div></div></span></body></html>

--B_3529739407_265376338--



From nobody Sun Nov  8 01:06:38 2015
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From: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
To: Wim Henderickx <wim.henderickx@gmail.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt
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Subject: Re: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt
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It is not a hard requirement. I will add it as a soft requirement (e.g., ei=
ther SHOULD or MAY) and it would only be for known unicast traffic - i.e., =
upstream and downstream traffic per VNI can be guaranteed to go through the=
 same PE for known unicast if the operator chooses so.

Cheers,
Ali

From: Wim Henderickx <wim.henderickx@gmail.com<mailto:wim.henderickx@gmail.=
com>>
Date: Saturday, November 7, 2015 at 7:10 PM
To: Cisco Employee <sajassi@cisco.com<mailto:sajassi@cisco.com>>, "bess@iet=
f.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.org>>
Subject: Re: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt

First if this is a  requirement it should be listed in section 2.

For known unicast traffic the document describes a upstream hash function i=
n section 4.2.1.
For BUM traffic It describes the SHG/DF procedures but there is no guarante=
e described that the downstream DF is similar to the upstream hash or IGP d=
istance in case of unequal cost. As such I don't see how for BUM traffic th=
e consistency between upstream and downstream is guaranteed? (section 4.2.2=
.)

From: Ali Sajassi <sajassi@cisco.com<mailto:sajassi@cisco.com>>
Date: Friday 6 November 2015 at 15:14
To: Wim Henderickx <wim.henderickx@gmail.com<mailto:wim.henderickx@gmail.co=
m>>, "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.=
org>>
Subject: Re: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt


Hi Wim,

If you can tell me what part of the draft is not clear, I will explain it h=
ere and if any further clarification in the draft needed, I will take care =
of it.

Cheers,
Ali

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of Wim Henderickx <wim.henderickx@gmail.com<mailto:wim.henderickx@gmail.com=
>>
Date: Wednesday, November 4, 2015 at 10:58 PM
To: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt

After clarification in the meeting I learned it is a requirement to select =
the same PE for upstream/downstream traffic.
My question is how is this done? Or better which mechanisms are used to ach=
ieve this?

--_000_D26533AD16062Asajassiciscocom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div><br>
</div>
<div>It is not a hard requirement. I will add it as a soft requirement (e.g=
., either SHOULD or MAY) and it would only be for known unicast traffic - i=
.e., upstream and downstream traffic per VNI can be guaranteed to go throug=
h the same PE for known unicast
 if the operator chooses so.</div>
<div><br>
</div>
<div>Cheers,</div>
<div>Ali</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Lucida Grande; font-size:11pt; text-align:left; c=
olor:black; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-B=
OTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt =
solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>Wim Henderickx &lt;<a href=3D=
"mailto:wim.henderickx@gmail.com">wim.henderickx@gmail.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Saturday, November 7, 2015 at=
 7:10 PM<br>
<span style=3D"font-weight:bold">To: </span>Cisco Employee &lt;<a href=3D"m=
ailto:sajassi@cisco.com">sajassi@cisco.com</a>&gt;, &quot;<a href=3D"mailto=
:bess@ietf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org=
">bess@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [bess] draft-sajassi-b=
ess-pbb-evpn-anycast-ip- tunnels-00.txt<br>
</div>
<div><br>
</div>
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<div>
<div>First if this is a &nbsp;requirement it should be listed in section 2.=
</div>
<div><br>
</div>
<div>For known unicast traffic the document describes a upstream hash funct=
ion in section 4.2.1.</div>
<div>For BUM traffic It describes the SHG/DF procedures but there is no gua=
rantee described that the downstream DF is similar to the upstream hash or =
IGP distance in case of unequal cost. As such I don&#8217;t see how for BUM=
 traffic the consistency between upstream
 and downstream is guaranteed? (section 4.2.2.)</div>
<div>
<div id=3D"MAC_OUTLOOK_SIGNATURE"></div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:12pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>Ali Sajassi &lt;<a href=3D"ma=
ilto:sajassi@cisco.com">sajassi@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Friday 6 November 2015 at 15:=
14<br>
<span style=3D"font-weight:bold">To: </span>Wim Henderickx &lt;<a href=3D"m=
ailto:wim.henderickx@gmail.com">wim.henderickx@gmail.com</a>&gt;, &quot;<a =
href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto=
:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [bess] draft-sajassi-b=
ess-pbb-evpn-anycast-ip- tunnels-00.txt<br>
</div>
<div><br>
</div>
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<div><br>
</div>
<div>Hi Wim,</div>
<div><br>
</div>
<div>If you can tell me what part of the draft is not clear, I will explain=
 it here and if any further clarification in the draft needed, I will take =
care of it.</div>
<div><br>
</div>
<div>Cheers,</div>
<div>Ali</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Lucida Grande; font-size:11pt; text-align:left; c=
olor:black; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-B=
OTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt =
solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>BESS &lt;<a href=3D"mailto:be=
ss-bounces@ietf.org">bess-bounces@ietf.org</a>&gt; on behalf of Wim Henderi=
ckx &lt;<a href=3D"mailto:wim.henderickx@gmail.com">wim.henderickx@gmail.co=
m</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Wednesday, November 4, 2015 a=
t 10:58 PM<br>
<span style=3D"font-weight:bold">To: </span>&quot;<a href=3D"mailto:bess@ie=
tf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org">bess@i=
etf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>[bess] draft-sajassi-bess-=
pbb-evpn-anycast-ip- tunnels-00.txt<br>
</div>
<div><br>
</div>
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<div>
<div>
<div>After clarification in the meeting I learned it is a requirement to se=
lect the same PE for upstream/downstream traffic.</div>
<div>My question is how is this done? Or better which mechanisms are used t=
o achieve this?</div>
<div>
<div id=3D""></div>
</div>
</div>
</div>
</div>
</div>
</span></div>
</div>
</span></div>
</div>
</span>
</body>
</html>

--_000_D26533AD16062Asajassiciscocom_--


From nobody Sun Nov  8 02:18:50 2015
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User-Agent: Microsoft-MacOutlook/0.0.0.151008
Date: Sun, 08 Nov 2015 11:18:42 +0100
From: Wim Henderickx <wim.henderickx@gmail.com>
To: "Ali Sajassi (sajassi)" <sajassi@cisco.com>, "bess@ietf.org" <bess@ietf.org>
Message-ID: <FE9966CB-FC79-4ADF-B014-F5904EF171AF@gmail.com>
Thread-Topic: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt
References: <D262E413.15FD2C%sajassi@cisco.com> <E4C8E983-FF6B-4EB4-AA51-F7C6D9A4A115@gmail.com> <D26533AD.16062A%sajassi@cisco.com>
In-Reply-To: <D26533AD.16062A%sajassi@cisco.com>
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Subject: Re: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt
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--B_3529826324_1016515943
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	charset="UTF-8"
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How will you do QoS guarantees if the BUM traffic is not accommodated in th=
is scheme ?

From:  Ali Sajassi <sajassi@cisco.com>
Date:  Sunday 8 November 2015 at 10:06
To:  Wim Henderickx <wim.henderickx@gmail.com>, "bess@ietf.org" <bess@ietf.=
org>
Subject:  Re: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt


It is not a hard requirement. I will add it as a soft requirement (e.g., ei=
ther SHOULD or MAY) and it would only be for known unicast traffic - i.e., u=
pstream and downstream traffic per VNI can be guaranteed to go through the s=
ame PE for known unicast if the operator chooses so.

Cheers,
Ali

From: Wim Henderickx <wim.henderickx@gmail.com>
Date: Saturday, November 7, 2015 at 7:10 PM
To: Cisco Employee <sajassi@cisco.com>, "bess@ietf.org" <bess@ietf.org>
Subject: Re: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt

First if this is a  requirement it should be listed in section 2.

For known unicast traffic the document describes a upstream hash function i=
n section 4.2.1.
For BUM traffic It describes the SHG/DF procedures but there is no guarante=
e described that the downstream DF is similar to the upstream hash or IGP di=
stance in case of unequal cost. As such I don=E2=80=99t see how for BUM traffic th=
e consistency between upstream and downstream is guaranteed? (section 4.2.2.=
)

From: Ali Sajassi <sajassi@cisco.com>
Date: Friday 6 November 2015 at 15:14
To: Wim Henderickx <wim.henderickx@gmail.com>, "bess@ietf.org" <bess@ietf.o=
rg>
Subject: Re: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt


Hi Wim,

If you can tell me what part of the draft is not clear, I will explain it h=
ere and if any further clarification in the draft needed, I will take care o=
f it.

Cheers,
Ali

From: BESS <bess-bounces@ietf.org> on behalf of Wim Henderickx <wim.henderi=
ckx@gmail.com>
Date: Wednesday, November 4, 2015 at 10:58 PM
To: "bess@ietf.org" <bess@ietf.org>
Subject: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt

After clarification in the meeting I learned it is a requirement to select =
the same PE for upstream/downstream traffic.
My question is how is this done? Or better which mechanisms are used to ach=
ieve this?


--B_3529826324_1016515943
Content-type: text/html;
	charset="UTF-8"
Content-transfer-encoding: quoted-printable

<html><head></head><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: s=
pace; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size:=
 14px; font-family: Calibri, sans-serif;"><div><div><div>How will you do QoS=
 guarantees if the BUM traffic is not accommodated in this scheme ?</div><di=
v><div id=3D"MAC_OUTLOOK_SIGNATURE"></div></div></div></div><div><br></div><sp=
an id=3D"OLK_SRC_BODY_SECTION"><div style=3D"font-family:Calibri; font-size:12pt=
; text-align:left; color:black; BORDER-BOTTOM: medium none; BORDER-LEFT: med=
ium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER=
-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt"><span =
style=3D"font-weight:bold">From: </span> Ali Sajassi &lt;<a href=3D"mailto:sajas=
si@cisco.com">sajassi@cisco.com</a>&gt;<br><span style=3D"font-weight:bold">Da=
te: </span> Sunday 8 November 2015 at 10:06<br><span style=3D"font-weight:bold=
">To: </span> Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@gmail.com">w=
im.henderickx@gmail.com</a>&gt;, "<a href=3D"mailto:bess@ietf.org">bess@ietf.o=
rg</a>" &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br><span st=
yle=3D"font-weight:bold">Subject: </span> Re: [bess] draft-sajassi-bess-pbb-ev=
pn-anycast-ip- tunnels-00.txt<br></div><div><br></div><div><meta http-equiv=3D=
"Content-Type" content=3D"text/html; charset=3Diso-8859-1"><div style=3D"word-wrap=
: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-spac=
e; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif;">=
<div><br></div><div>It is not a hard requirement. I will add it as a soft re=
quirement (e.g., either SHOULD or MAY) and it would only be for known unicas=
t traffic - i.e., upstream and downstream traffic per VNI can be guaranteed =
to go through the same PE for known unicast
 if the operator chooses so.</div><div><br></div><div>Cheers,</div><div>Ali=
</div><div><br></div><span id=3D"OLK_SRC_BODY_SECTION"><div style=3D"font-family=
:Lucida Grande; font-size:11pt; text-align:left; color:black; BORDER-BOTTOM:=
 medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0=
in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium =
none; PADDING-TOP: 3pt"><span style=3D"font-weight:bold">From: </span>Wim Hend=
erickx &lt;<a href=3D"mailto:wim.henderickx@gmail.com">wim.henderickx@gmail.co=
m</a>&gt;<br><span style=3D"font-weight:bold">Date: </span>Saturday, November =
7, 2015 at 7:10 PM<br><span style=3D"font-weight:bold">To: </span>Cisco Employ=
ee &lt;<a href=3D"mailto:sajassi@cisco.com">sajassi@cisco.com</a>&gt;, "<a hre=
f=3D"mailto:bess@ietf.org">bess@ietf.org</a>" &lt;<a href=3D"mailto:bess@ietf.or=
g">bess@ietf.org</a>&gt;<br><span style=3D"font-weight:bold">Subject: </span>R=
e: [bess] draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt<br></div><d=
iv><br></div><div><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: spac=
e; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14=
px; font-family: Calibri, sans-serif;"><div><div>First if this is a &nbsp;re=
quirement it should be listed in section 2.</div><div><br></div><div>For kno=
wn unicast traffic the document describes a upstream hash function in sectio=
n 4.2.1.</div><div>For BUM traffic It describes the SHG/DF procedures but th=
ere is no guarantee described that the downstream DF is similar to the upstr=
eam hash or IGP distance in case of unequal cost. As such I don&#8217;t see =
how for BUM traffic the consistency between upstream
 and downstream is guaranteed? (section 4.2.2.)</div><div><div id=3D""></div>=
</div></div><div><br></div><span id=3D"OLK_SRC_BODY_SECTION"><div style=3D"font-=
family:Calibri; font-size:12pt; text-align:left; color:black; BORDER-BOTTOM:=
 medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0=
in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium =
none; PADDING-TOP: 3pt"><span style=3D"font-weight:bold">From: </span>Ali Saja=
ssi &lt;<a href=3D"mailto:sajassi@cisco.com">sajassi@cisco.com</a>&gt;<br><spa=
n style=3D"font-weight:bold">Date: </span>Friday 6 November 2015 at 15:14<br><=
span style=3D"font-weight:bold">To: </span>Wim Henderickx &lt;<a href=3D"mailto:=
wim.henderickx@gmail.com">wim.henderickx@gmail.com</a>&gt;, "<a href=3D"mailto=
:bess@ietf.org">bess@ietf.org</a>" &lt;<a href=3D"mailto:bess@ietf.org">bess@i=
etf.org</a>&gt;<br><span style=3D"font-weight:bold">Subject: </span>Re: [bess]=
 draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt<br></div><div><br></=
div><div><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webki=
t-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-=
family: Calibri, sans-serif;"><div><br></div><div>Hi Wim,</div><div><br></di=
v><div>If you can tell me what part of the draft is not clear, I will explai=
n it here and if any further clarification in the draft needed, I will take =
care of it.</div><div><br></div><div>Cheers,</div><div>Ali</div><div><br></d=
iv><span id=3D"OLK_SRC_BODY_SECTION"><div style=3D"font-family:Lucida Grande; fo=
nt-size:11pt; text-align:left; color:black; BORDER-BOTTOM: medium none; BORD=
ER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT:=
 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP:=
 3pt"><span style=3D"font-weight:bold">From: </span>BESS &lt;<a href=3D"mailto:b=
ess-bounces@ietf.org">bess-bounces@ietf.org</a>&gt; on behalf of Wim Henderi=
ckx &lt;<a href=3D"mailto:wim.henderickx@gmail.com">wim.henderickx@gmail.com</=
a>&gt;<br><span style=3D"font-weight:bold">Date: </span>Wednesday, November 4,=
 2015 at 10:58 PM<br><span style=3D"font-weight:bold">To: </span>"<a href=3D"mai=
lto:bess@ietf.org">bess@ietf.org</a>" &lt;<a href=3D"mailto:bess@ietf.org">bes=
s@ietf.org</a>&gt;<br><span style=3D"font-weight:bold">Subject: </span>[bess] =
draft-sajassi-bess-pbb-evpn-anycast-ip- tunnels-00.txt<br></div><div><br></d=
iv><div><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit=
-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-f=
amily: Calibri, sans-serif;"><div><div><div>After clarification in the meeti=
ng I learned it is a requirement to select the same PE for upstream/downstre=
am traffic.</div><div>My question is how is this done? Or better which mecha=
nisms are used to achieve this?</div><div><div id=3D""></div></div></div></div=
></div></div></span></div></div></span></div></div></span></div></div></span=
></body></html>

--B_3529826324_1016515943--



From nobody Mon Nov  9 18:45:15 2015
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Date: Tue, 10 Nov 2015 10:45:10 +0800
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From: Dapeng Liu <maxpassion@gmail.com>
To: thomas.morin@orange.com
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Subject: Re: [bess] The BESS WG has adopted draft-hao-bess-inter-nvo3-vpn-optionc (*not yet*, in fact)
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--001a11441b74c5a1ed052426b2b8
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Hello all,

I think this draft is in good shape, I personally support the adoption.

One comments is that the security consideration section could be improved.

Thanks,
Dapeng Liu

2015-11-02 17:03 GMT+08:00 <thomas.morin@orange.com>:

> Please ignore this bogus automated email: the document is just being
> called for adoption, and no decision will be taken before the call for
> adoption is over.
>
> -Thomas
>
> 2015-11-02, IETF Secretariat:
>
>>
>> The BESS WG has adopted draft-hao-bess-inter-nvo3-vpn-optionc (entered by
>> Thomas Morin)
>>
>> The document is available at
>> https://datatracker.ietf.org/doc/draft-hao-bess-inter-nvo3-vpn-optionc/
>>
>>
>> Comment:
>> This poll runs until **November 13th**.
>>
>>
>
>
> _________________________________________________________________________________________________________________________
>
> Ce message et ses pieces jointes peuvent contenir des informations
> confidentielles ou privilegiees et ne doivent donc
> pas etre diffuses, exploites ou copies sans autorisation. Si vous avez
> recu ce message par erreur, veuillez le signaler
> a l'expediteur et le detruire ainsi que les pieces jointes. Les messages
> electroniques etant susceptibles d'alteration,
> Orange decline toute responsabilite si ce message a ete altere, deforme ou
> falsifie. Merci.
>
> This message and its attachments may contain confidential or privileged
> information that may be protected by law;
> they should not be distributed, used or copied without authorisation.
> If you have received this email in error, please notify the sender and
> delete this message and its attachments.
> As emails may be altered, Orange is not liable for messages that have been
> modified, changed or falsified.
> Thank you.
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> _______________________________________________
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> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
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-- 

------
Best Regards,
Dapeng Liu

--001a11441b74c5a1ed052426b2b8
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<div dir=3D"ltr">Hello all,<div><br></div><div>I think this draft is in goo=
d shape, I personally support the adoption.</div><div><br></div><div>One co=
mments is that the security consideration section could be improved.</div><=
div><br></div><div>Thanks,</div><div>Dapeng Liu<br><div class=3D"gmail_extr=
a"><br><div class=3D"gmail_quote">2015-11-02 17:03 GMT+08:00  <span dir=3D"=
ltr">&lt;<a href=3D"mailto:thomas.morin@orange.com" target=3D"_blank">thoma=
s.morin@orange.com</a>&gt;</span>:<br><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Please=
 ignore this bogus automated email: the document is just being called for a=
doption, and no decision will be taken before the call for adoption is over=
.<br>
<br>
-Thomas<br>
<br>
2015-11-02, IETF Secretariat:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<br>
The BESS WG has adopted draft-hao-bess-inter-nvo3-vpn-optionc (entered by<b=
r>
Thomas Morin)<br>
<br>
The document is available at<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-hao-bess-inter-nvo3-vpn-o=
ptionc/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/=
doc/draft-hao-bess-inter-nvo3-vpn-optionc/</a><br>
<br>
<br>
Comment:<br>
This poll runs until **November 13th**.<br>
<br>
</blockquote>
<br>
<br>
___________________________________________________________________________=
______________________________________________<br>
<br>
Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc<br>
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler<br>
a l&#39;expediteur et le detruire ainsi que les pieces jointes. Les message=
s electroniques etant susceptibles d&#39;alteration,<br>
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.<br>
<br>
This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;<br>
they should not be distributed, used or copied without authorisation.<br>
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.<br>
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.<br>
Thank you.<br>
<br>
_______________________________________________<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org" target=3D"_blank">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
</blockquote></div><br><br clear=3D"all"><div><br></div>-- <br><div class=
=3D"gmail_signature"><br>------<br>Best Regards,<br>Dapeng Liu</div>
</div></div></div>

--001a11441b74c5a1ed052426b2b8--


From nobody Mon Nov  9 23:11:17 2015
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Subject: [bess] I-D Action: draft-ietf-bess-virtual-subnet-03.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
 This draft is a work item of the BGP Enabled Services Working Group of the IETF.

        Title           : Virtual Subnet: A BGP/MPLS IP VPN-based Subnet Extension Solution
        Authors         : Xiaohu Xu
                          Robert Raszuk
                          Christian Jacquenet
                          Truman Boyes
                          Brendan Fee
	Filename        : draft-ietf-bess-virtual-subnet-03.txt
	Pages           : 14
	Date            : 2015-11-09

Abstract:
   This document describes a BGP/MPLS IP VPN-based subnet extension
   solution referred to as Virtual Subnet, which can be used for
   building Layer 3 network virtualization overlays within and/or
   between data centers.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-virtual-subnet/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-bess-virtual-subnet-03

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-virtual-subnet-03


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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<body lang=3D"ZH-CN" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Hi Alvaro,=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp=
;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">We have up=
dated the draft according to your comments and suggestions. Thanks again fo=
r your AD review of this document.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp=
;</o:p></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">The IETF datatracker status =
page for this draft is:<o:p></o:p></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US"><a href=3D"https://datatrack=
er.ietf.org/doc/draft-ietf-bess-virtual-subnet/">https://datatracker.ietf.o=
rg/doc/draft-ietf-bess-virtual-subnet/</a><o:p></o:p></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">There's also a htmlized vers=
ion available at:<o:p></o:p></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US"><a href=3D"https://tools.iet=
f.org/html/draft-ietf-bess-virtual-subnet-03">https://tools.ietf.org/html/d=
raft-ietf-bess-virtual-subnet-03</a><o:p></o:p></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">A diff from the previous ver=
sion is available at:<o:p></o:p></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US"><a href=3D"https://www.ietf.=
org/rfcdiff?url2=3Ddraft-ietf-bess-virtual-subnet-03">https://www.ietf.org/=
rfcdiff?url2=3Ddraft-ietf-bess-virtual-subnet-03</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp=
;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Best regar=
ds,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Xiaohu<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp=
;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span =
lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&qu=
ot;sans-serif&quot;"> Xuxiaohu
<br>
<b>Sent:</b> Monday, November 02, 2015 1:04 PM<br>
<b>To:</b> Alvaro Retana (aretana); draft-ietf-bess-virtual-subnet@ietf.org=
<br>
<b>Cc:</b> VIGOUREUX, MARTIN (MARTIN); bess-chairs@ietf.org; bess@ietf.org<=
br>
<b>Subject:</b> Re: AD Review of draft-ietf-bess-virtual-subnet-02<o:p></o:=
p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<div>
<p><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&=
quot;,&quot;sans-serif&quot;;color:black">Hi Alvaro,<o:p></o:p></span></p>
<p><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&=
quot;,&quot;sans-serif&quot;;color:black">&nbsp;<o:p></o:p></span></p>
<p><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&=
quot;,&quot;sans-serif&quot;;color:black">Thanks for your detailed AD revie=
w. We will update the draft according to your comments soon.<o:p></o:p></sp=
an></p>
<p><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&=
quot;,&quot;sans-serif&quot;;color:black">&nbsp;<o:p></o:p></span></p>
<p><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&=
quot;,&quot;sans-serif&quot;;color:black">Best regards,<o:p></o:p></span></=
p>
<p><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&=
quot;,&quot;sans-serif&quot;;color:black">Xiaohu (on behalf of all co-autho=
rs)<o:p></o:p></span></p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 lang=3D"EN-US" style=3D"font-family:&quot;Times New Roman&quot;,&quot;seri=
f&quot;;color:black">
<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
<div id=3D"divRpF791949">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;color:black">=B7=A2=BC=FE=C8=CB</span></b><b><span lang=3D"EN=
-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-se=
rif&quot;;color:black">:</span></b><span lang=3D"EN-US" style=3D"font-size:=
10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:black">
 Alvaro Retana (aretana) [aretana@cisco.com]<br>
</span><b><span style=3D"font-size:10.0pt;color:black">=B7=A2=CB=CD=CA=B1=
=BC=E4</span></b><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-fam=
ily:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:black">:</span></b><spa=
n lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&=
quot;sans-serif&quot;;color:black">
 2015</span><span style=3D"font-size:10.0pt;color:black">=C4=EA</span><span=
 lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&q=
uot;sans-serif&quot;;color:black">10</span><span style=3D"font-size:10.0pt;=
color:black">=D4=C2</span><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:black">28</span><=
span style=3D"font-size:10.0pt;color:black">=C8=D5</span><span lang=3D"EN-U=
S" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-seri=
f&quot;;color:black">
 5:38<br>
</span><b><span style=3D"font-size:10.0pt;color:black">=CA=D5=BC=FE=C8=CB</=
span></b><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quo=
t;Tahoma&quot;,&quot;sans-serif&quot;;color:black">:</span></b><span lang=
=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;s=
ans-serif&quot;;color:black">
<a href=3D"mailto:draft-ietf-bess-virtual-subnet@ietf.org">draft-ietf-bess-=
virtual-subnet@ietf.org</a><br>
</span><b><span style=3D"font-size:10.0pt;color:black">=B3=AD=CB=CD</span><=
/b><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Taho=
ma&quot;,&quot;sans-serif&quot;;color:black">:</span></b><span lang=3D"EN-U=
S" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-seri=
f&quot;;color:black">
 VIGOUREUX, MARTIN (MARTIN); <a href=3D"mailto:bess-chairs@ietf.org">bess-c=
hairs@ietf.org</a>;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
</span><b><span style=3D"font-size:10.0pt;color:black">=D6=F7=CC=E2</span><=
/b><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Taho=
ma&quot;,&quot;sans-serif&quot;;color:black">:</span></b><span lang=3D"EN-U=
S" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-seri=
f&quot;;color:black">
 AD Review of draft-ietf-bess-virtual-subnet-02</span><span lang=3D"EN-US" =
style=3D"font-family:&quot;Times New Roman&quot;,&quot;serif&quot;;color:bl=
ack"><o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Dear authors=
:<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;<=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">I just finis=
hed reading this document. &nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;<=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">All of what =
is described in this document is straight forward, so much so that it requi=
res no change to existing technology, which makes me think
 that users/operators have been able to do this all along. &nbsp;Is that co=
rrect? &nbsp;Is there anything special that was missing that this document =
brings to light? &nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;<=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Being one of=
 several possible solutions for &quot;</span><span lang=3D"EN-US" style=3D"=
font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">network=
 virtualization
 overlays within and/or between&nbsp;data centers&quot;</span><span lang=3D=
"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;san=
s-serif&quot;;color:black">, I'm wondering about the value of publishing wh=
at amounts to a set of use cases without even discussing when their
 use would be suitable (declared out of scope). &nbsp;I reviewed the discus=
sions on the lists (l3vpn/bess) and can clearly see why the Shepherd charac=
terized the document as &quot;could have been considered controversial&quot=
;. &nbsp;Had I reviewed the document at adoption time
 I probably would have ended up in the rough side of the consensus. &nbsp;T=
here's obviously no need to revisit the topic of what do to with this docum=
ent since clearly the WG Chairs believe there is consensus to publish.</spa=
n><span lang=3D"EN-US" style=3D"font-family:&quot;Times New Roman&quot;,&qu=
ot;serif&quot;;color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;<=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">I do have so=
me other comments (below). In general some of the text could be made easier=
 to read (see some nits below). &nbsp;I would like to see my comment
 about rfc2119 language addressed (and an update published) before starting=
 the IETF Last Call.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;<=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Thanks!<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;<=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Alvaro.<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;<=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;<=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Major:<o:p><=
/o:p></span></p>
</div>
<ol start=3D"1" type=3D"1">
<li class=3D"MsoNormal" style=3D"color:black;mso-margin-top-alt:auto;mso-ma=
rgin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">The use of rfc2119 keywords is not required. &n=
bsp;Note that in general these keywords &quot;MUST only be used where it is=
&nbsp;actually required for interoperation&quot;, but you're using them to =
apparently
 express requirements w/out specific guidance or to restate what is normal =
network operation . &nbsp;For example:
<o:p></o:p></span></li></ol>
<ol start=3D"1" type=3D"1">
<ul type=3D"circle">
<li class=3D"MsoNormal" style=3D"color:black;mso-margin-top-alt:auto;mso-ma=
rgin-bottom-alt:auto;mso-list:l0 level2 lfo1">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">In Section&nbsp;3.3. (CE Host Discovery) the te=
xt reads: &quot;PE routers SHOULD be able to discover their local CE hosts=
=A1=AD PE routers could accomplish local CE host discovery by=A1=ADARP or N=
D=A1=ADLLDP=A1=ADVDP),
 or even interaction with the data center orchestration system=A1=AD&quot; =
&nbsp;There is no specific mechanism mandated that supports the use of &quo=
t;SHOULD&quot;.
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level2 lfo1">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">In Section&nbsp;3.4. (ARP/ND Proxy): &quot;PE r=
outers SHOULD only respond to an ARP request or Neighbor Solicitation (NS) =
message for a target host when it has a best route for that target
 host in the associated VRF and the outgoing interface of that best route i=
s different from the one over which the ARP request or NS message is receiv=
ed.&quot; &nbsp;Isn't this how proxy ARP already works? &nbsp;Am I missing =
something that requires the use of &quot;SHOULD&quot; in
 this document? <o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"col=
or:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 lev=
el2 lfo1">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">Section&nbsp;4.3. (TTL and Traceroute) describe=
s a limitation and then says &quot;=A1=ADunless special TTL processing&nbsp=
;for such case has been implemented (e.g., if the source and&nbsp;destinati=
on addresses=A1=ADbelong
 to the&nbsp;same extended subnet, neither ingress nor egress PE routers SH=
OULD&nbsp;decrement the TTL=A1=ADTTL of such&nbsp;packet SHOULD NOT be copi=
ed into the TTL of the transport=A1=AD&quot; &nbsp;In this case the rfc2119=
 keywords are used as part of an example (e.g.)..which doesn't really
 support the use of &quot;SHOULD/SHOULD NOT&quot;. &nbsp;Is the intent to s=
pecify this &quot;special processing&quot; in this document? &nbsp;If so, w=
hy &quot;SHOULD&quot; and not &quot;MUST&quot;? &nbsp;Algo, given that the =
text appears in the Limitations section, if you're mandating the &quot;spec=
ial processing&quot; then
 it wouldn't be a limitation anymore..<o:p></o:p></span></li></ul>
</ol>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Minor:<o:p><=
/o:p></span></p>
</div>
<ol start=3D"1" type=3D"1">
<li class=3D"MsoNormal" style=3D"color:black;mso-margin-top-alt:auto;mso-ma=
rgin-bottom-alt:auto;mso-list:l2 level1 lfo2">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">I think that RFC4761, 4762, 4659, 5798 and 6513=
 should be Informational references.
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l2 level1 lfo2">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">You first use &quot;VS&quot; in Section 3.6. &n=
bsp;I'm assuming this is related to &quot;virtual subnet&quot;, but there's=
 no explicit association.
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l2 level1 lfo2">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">Multicast. &nbsp;Section&nbsp;3.2. (Multicast) =
says that for &quot;IP multicast between CE hosts of the same virtual subne=
t,&nbsp;MVPN technologies [RFC6513] could be directly used without any&nbsp=
;change&quot;.
 &nbsp;I'm assuming that you're not referring to link-local multicast (betw=
een hosts on the same subnet) because later (Section 4.2) you say that &quo=
t;link-local&nbsp;multicast traffic cannot be supported&quot;. &nbsp;Please=
 clarify in 3.2 what type of multicast you're talking about,
 and/or which you're not. <o:p></o:p></span></li><li class=3D"MsoNormal" st=
yle=3D"color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-l=
ist:l2 level1 lfo2">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">Section&nbsp;4.3. (TTL and Traceroute). &nbsp;W=
hat does this mean: &quot;traceroute output would reflect the fact that&nbs=
p;these two hosts belonging to the same subnet are actually connected&nbsp;=
via an
 virtual subnet emulated by ARP proxy, rather than a normal&nbsp;LAN&quot;?=
 &nbsp;I think&nbsp;I know, but please be specific in the text.<o:p></o:p><=
/span></li></ol>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;<=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Nits:<o:p></=
o:p></span></p>
</div>
<ol start=3D"1" type=3D"1">
<li class=3D"MsoNormal" style=3D"color:black;mso-margin-top-alt:auto;mso-ma=
rgin-bottom-alt:auto;mso-list:l1 level1 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">Section&nbsp;1. (Introduction)
<o:p></o:p></span></li></ol>
<ol start=3D"1" type=3D"1">
<ul type=3D"circle">
<li class=3D"MsoNormal" style=3D"color:black;mso-margin-top-alt:auto;mso-ma=
rgin-bottom-alt:auto;mso-list:l1 level2 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">s/commonly used in those situations/commonly us=
ed in situations
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level2 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">There are a couple of very long sentences that =
could be simplified =A1=AA they make sense, but other reviewers may not cap=
ture the essence. &nbsp;Just a suggestion
<o:p></o:p></span></li></ul>
</ol>
<ol start=3D"1" type=3D"1">
<ul type=3D"circle">
<ul type=3D"square">
<li class=3D"MsoNormal" style=3D"color:black;mso-margin-top-alt:auto;mso-ma=
rgin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">OLD&gt;<o:p></o:p></span></li><li class=3D"MsoN=
ormal" style=3D"color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:a=
uto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;"><o:p>&nbsp;</o:p></span></li><li class=3D"MsoNo=
rmal" style=3D"color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:au=
to;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">As&nbsp;a result, the traffic from a cloud user=
 (i.e., a VPN user) which
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">is destined for a given server located at one d=
ata center
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">location of such extended subnet may arrive at =
another data
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">center location firstly according to the subnet=
 route, and then
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">be forwarded to the location where the service =
is actually
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">located. &nbsp;This suboptimal routing would ob=
viously result in an
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">unnecessary consumption of the bandwidth resour=
ce between data
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">centers. &nbsp;Furthermore, in the case where t=
he traditional VPLS
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">technology [RFC4761] [RFC4762] is used for data=
 center
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">interconnect and default gateways of different =
data center
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">locations are configured within the same virtua=
l router
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">redundancy group, the returning traffic from th=
at server to the
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">cloud user may be forwarded at layer2 to a defa=
ult gateway
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">located at one of the remote data center premis=
es, rather than
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">the one placed at the local data center locatio=
n. &nbsp;This
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">suboptimal routing would also unnecessarily con=
sume the bandwidth
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">resource between data centers
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">NEW&gt;
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;"><o:p>&nbsp;</o:p></span></li><li class=3D"MsoNo=
rmal" style=3D"color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:au=
to;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">As a result, the traffic between a specific use=
r and server, in different&nbsp;
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">data centers, may first be routed through a thi=
rd data center.
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">This suboptimal routing would obviously result =
in an
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">unnecessary consumption of the bandwidth resour=
ce between data
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">centers. &nbsp;Furthermore, in the case where t=
raditional VPLS
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">technology [RFC4761] [RFC4762] is used for data=
 center
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">interconnect, return traffic from a server may =
be forwarded to a
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">default gateway located in a different data cen=
ter due to the configuration
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">in a virtual router redundancy group. &nbsp;Thi=
s
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">suboptimal routing would also unnecessarily con=
sume the bandwidth
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level3 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">resource between data centers.<o:p></o:p></span=
></li></ul>
</ul>
</ol>
<ol start=3D"2" type=3D"1">
<li class=3D"MsoNormal" style=3D"color:black;mso-margin-top-alt:auto;mso-ma=
rgin-bottom-alt:auto;mso-list:l1 level1 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">Please be consistent on how &quot;Layer 2&quot;=
 and &quot;Layer 3&quot; is used..it is not consistent now. &nbsp;My person=
al preference is &quot;Layer x&quot;.
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">s/CE hosts/hosts
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">s/ARP proxy/an&nbsp;ARP proxy
<o:p></o:p></span></li><li class=3D"MsoNormal" style=3D"color:black;mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">Missing references: &nbsp;&quot;Link Layer Disc=
overy Protocol (LLDP)&quot;, &quot;VSI Discovery and Configuration Protocol=
 (VDP)&quot;<o:p></o:p></span></li></ol>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

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From: Haoweiguo <haoweiguo@huawei.com>
To: "sajassi@cisco.com" <sajassi@cisco.com>, "jdrake@juniper.net" <jdrake@juniper.net>
Thread-Topic: One question about 'draft-ietf-bess-evpn-overlay-02'
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Subject: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
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Hi Ali & John,

The draft of 'draft-ietf-bess-evpn-overlay-02' describes how EVPN can be us=
ed for Overlay network, the overlay network includes VXLAN, NVGRE and MPLS =
Over GRE.

In section 13 IANA considerations, several overlay tunnel types are request=
ed as follows:

8    VXLAN Encapsulation
9    NVGRE Encapsulation
10   MPLS Encapsulation   (?)
11   MPLS in GRE Encapsulation
12   VXLAN GPE Encapsulation



IMO, 8,9,11 and 12 are all overlay encapsulations, 10 is an exception. Woul=
d you like to explain what's the purpose of tunnel type 10?



Thanks,

weiguo


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<html dir=3D"ltr">
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
<style id=3D"owaParaStyle">P {
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<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">
<p><font size=3D"3" face=3D"Calibri">Hi Ali &amp; John,</font></p>
<p><font size=3D"3" face=3D"Calibri">The draft of 'draft-ietf-bess-evpn-ove=
rlay-02' describes how EVPN can be used for Overlay network, the overlay ne=
twork includes VXLAN, NVGRE and MPLS Over GRE.</font></p>
<p><font size=3D"3" face=3D"Calibri">In section 13 IANA considerations, sev=
eral overlay tunnel types are requested as follows:</font></p>
<p><font size=3D"3" face=3D"Calibri">8&nbsp;&nbsp;&nbsp; VXLAN Encapsulatio=
n<br>
9&nbsp;&nbsp;&nbsp; NVGRE Encapsulation<br>
10&nbsp;&nbsp; MPLS Encapsulation&nbsp;&nbsp; (?)<br>
11&nbsp;&nbsp; MPLS in GRE Encapsulation<br>
12&nbsp;&nbsp; VXLAN GPE Encapsulation</font></p>
<p><font size=3D"3" face=3D"Calibri"></font>&nbsp;</p>
<p><font size=3D"3" face=3D"Calibri">IMO, 8,9,11 and 12 are all overlay enc=
apsulations, 10 is an exception. Would you like to explain what's the purpo=
se of tunnel type 10?</font></p>
<p><font size=3D"3" face=3D"Calibri"></font>&nbsp;</p>
<p><font size=3D"3" face=3D"Calibri">Thanks,</font></p>
<p><font size=3D"3" face=3D"Calibri">weiguo<br>
<br>
</font></p>
</div>
</body>
</html>

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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: Xuxiaohu <xuxiaohu@huawei.com>, "draft-ietf-bess-virtual-subnet@ietf.org" <draft-ietf-bess-virtual-subnet@ietf.org>
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Subject: Re: [bess] AD Review of draft-ietf-bess-virtual-subnet-02
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On 11/10/15, 2:18 AM, "Xuxiaohu" <xuxiaohu@huawei.com<mailto:xuxiaohu@huawe=
i.com>> wrote:

Xiaohu:

Hi!

We have updated the draft according to your comments and suggestions.

I just have a couple of small items.  Please see my comments below..

I'm going to start the IETF Last Call and put this document up for the IESG=
 Telechat on Dec/3.  Please post an update based on the comments below by t=
he end of the week.

Thanks!

Alvaro.

. . .
Major:

  1.  The use of rfc2119 keywords is not required.

You left in the rfc2119 boilerplate and reference, please take them off.

...

  1.  You first use "VS" in Section 3.6.  I'm assuming this is related to "=
virtual subnet", but there's no explicit association.

I see that you expanded in 3.6, but now VS is used for the first time in 3.=
8 w/out explicitly expanding.

Solution: in 3.6  s/Virtual Subnet/Virtual Subnet (VS)


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ize: 14px;">
On 11/10/15, 2:18 AM, &quot;Xuxiaohu&quot; &lt;<a href=3D"mailto:xuxiaohu@h=
uawei.com">xuxiaohu@huawei.com</a>&gt; wrote:</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
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<br>
</div>
<div><font face=3D"Calibri,sans-serif">Xiaohu:</font></div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">Hi!</font></div>
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"color: rgb(0, 0, 0); font-family=
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color: rgb(31, 73, 125); font-family:=
 Calibri, sans-serif; font-size: 16pt;">We have updated the draft according=
 to your comments and suggestions.&nbsp;</span></p>
</div>
</div>
</div>
</blockquote>
</span>
<div><br>
</div>
<div>I just have a couple of small items. &nbsp;Please see my comments belo=
w..</div>
<div><br>
</div>
<div>I'm going to start the IETF Last Call and put this document up for the=
 IESG Telechat on Dec/3. &nbsp;Please post an update based on the comments =
below by the end of the week.</div>
<div><br>
</div>
<div>Thanks!</div>
<div><br>
</div>
<div>Alvaro.</div>
<div><br>
</div>
<div>. . .</div>
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mlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:/=
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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size: 10.5pt; fon=
t-family: Calibri, sans-serif; color: black;">Major:<o:p></o:p></span></p>
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rgin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span lang=3D"EN-US" style=3D"font-size: 10.5pt; font-family: Calibri, sans=
-serif;">The use of rfc2119 keywords is not required.</span></li></ol>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</span>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<span style=3D"font-family: Calibri; font-size: medium;">You left in the rf=
c2119 boilerplate and reference, please take them off.</span></div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
&#8230;</div>
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mlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:/=
/www.w3.org/TR/REC-html40">
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<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
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<ol start=3D"1" type=3D"1">
<li class=3D"MsoNormal" style=3D"color:black;mso-margin-top-alt:auto;mso-ma=
rgin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style=3D"font-family: Calibri, sans-serif; font-size: 10.5pt;">You fi=
rst use &quot;VS&quot; in Section 3.6. &nbsp;I'm assuming this is related t=
o &quot;virtual subnet&quot;, but there's no explicit association.</span></=
li></ol>
</div>
</div>
</div>
</div>
</blockquote>
</span>
<div><br>
</div>
<div>I see that you expanded in 3.6, but now VS is used for the first time =
in 3.8 w/out explicitly expanding.</div>
<div><br>
</div>
<div>Solution: in 3.6 &nbsp;s/Virtual Subnet/Virtual Subnet (VS)</div>
<div><br>
</div>
</body>
</html>

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Subject: [bess] Last Call: <draft-ietf-bess-virtual-subnet-03.txt> (Virtual Subnet: A BGP/MPLS IP VPN-based Subnet Extension Solution) to Informational RFC
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The IESG has received a request from the BGP Enabled Services WG (bess)
to consider the following document:
- 'Virtual Subnet: A BGP/MPLS IP VPN-based Subnet Extension Solution'
  <draft-ietf-bess-virtual-subnet-03.txt> as Informational RFC

The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action. Please send substantive comments to the
ietf@ietf.org mailing lists by 2015-11-24. Exceptionally, comments may be
sent to iesg@ietf.org instead. In either case, please retain the
beginning of the Subject line to allow automated sorting.

Abstract


   This document describes a BGP/MPLS IP VPN-based subnet extension
   solution referred to as Virtual Subnet, which can be used for
   building Layer 3 network virtualization overlays within and/or
   between data centers.




The file can be obtained via
https://datatracker.ietf.org/doc/draft-ietf-bess-virtual-subnet/

IESG discussion can be tracked via
https://datatracker.ietf.org/doc/draft-ietf-bess-virtual-subnet/ballot/


No IPR declarations have been submitted directly on this I-D.



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To: "Alvaro Retana (aretana)" <aretana@cisco.com>, "draft-ietf-bess-virtual-subnet@ietf.org" <draft-ietf-bess-virtual-subnet@ietf.org>
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Subject: Re: [bess] AD Review of draft-ietf-bess-virtual-subnet-02
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Alvaro,

I will update it ASAP.

Best regards,
Xiaohu

From: Alvaro Retana (aretana) [mailto:aretana@cisco.com]
Sent: Wednesday, November 11, 2015 2:27 AM
To: Xuxiaohu; draft-ietf-bess-virtual-subnet@ietf.org
Cc: VIGOUREUX, MARTIN (MARTIN); bess-chairs@ietf.org; bess@ietf.org
Subject: Re: AD Review of draft-ietf-bess-virtual-subnet-02

On 11/10/15, 2:18 AM, "Xuxiaohu" <xuxiaohu@huawei.com<mailto:xuxiaohu@huawe=
i.com>> wrote:

Xiaohu:

Hi!

We have updated the draft according to your comments and suggestions.

I just have a couple of small items.  Please see my comments below..

I'm going to start the IETF Last Call and put this document up for the IESG=
 Telechat on Dec/3.  Please post an update based on the comments below by t=
he end of the week.

Thanks!

Alvaro.

. . .
Major:

  1.  The use of rfc2119 keywords is not required.

You left in the rfc2119 boilerplate and reference, please take them off.

...

  1.  You first use "VS" in Section 3.6.  I'm assuming this is related to "=
virtual subnet", but there's no explicit association.

I see that you expanded in 3.6, but now VS is used for the first time in 3.=
8 w/out explicitly expanding.

Solution: in 3.6  s/Virtual Subnet/Virtual Subnet (VS)


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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Alvaro,<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp=
;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">I will upd=
ate it ASAP.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp=
;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Best regar=
ds,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Xiaohu<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp=
;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
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<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span =
lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&qu=
ot;sans-serif&quot;"> Alvaro Retana (aretana) [mailto:aretana@cisco.com]
<br>
<b>Sent:</b> Wednesday, November 11, 2015 2:27 AM<br>
<b>To:</b> Xuxiaohu; draft-ietf-bess-virtual-subnet@ietf.org<br>
<b>Cc:</b> VIGOUREUX, MARTIN (MARTIN); bess-chairs@ietf.org; bess@ietf.org<=
br>
<b>Subject:</b> Re: AD Review of draft-ietf-bess-virtual-subnet-02<o:p></o:=
p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">On 11/10/15,=
 2:18 AM, &quot;Xuxiaohu&quot; &lt;<a href=3D"mailto:xuxiaohu@huawei.com">x=
uxiaohu@huawei.com</a>&gt; wrote:<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;<=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cali=
bri&quot;,&quot;sans-serif&quot;">Xiaohu:</span><span lang=3D"EN-US" style=
=3D"font-family:&quot;Times New Roman&quot;,&quot;serif&quot;"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cali=
bri&quot;,&quot;sans-serif&quot;">Hi!</span><span lang=3D"EN-US"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;<=
/o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-right:0cm" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:16.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">We have up=
dated the draft according to your comments and suggestions.&nbsp;</span><sp=
an lang=3D"EN-US" style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;">I just have a couple of small items. &=
nbsp;Please see my comments below..<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;">I'm going to start the IETF Last Call =
and put this document up for the IESG Telechat on Dec/3. &nbsp;Please post =
an update based on the comments below by the end of the week.<o:p></o:p></s=
pan></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;">Thanks!<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;">Alvaro.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;">. . .<o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-right:0cm" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Major:</span=
><span lang=3D"EN-US" style=3D"color:black"><o:p></o:p></span></p>
</div>
<ol start=3D"1" type=3D"1">
<li class=3D"MsoNormal" style=3D"color:black;mso-margin-top-alt:auto;mso-ma=
rgin-bottom-alt:auto;mso-list:l0 level1 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">The use of rfc2119 keywords is not required.</s=
pan><span lang=3D"EN-US"><o:p></o:p></span></li></ol>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;<=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:13.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">You left in =
the rfc2119 boilerplate and reference, please take them off.</span><span la=
ng=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quo=
t;sans-serif&quot;;color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;<=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">&#8230;<o:p>=
</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-right:0cm" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<ol start=3D"2" type=3D"1">
<li class=3D"MsoNormal" style=3D"color:black;mso-margin-top-alt:auto;mso-ma=
rgin-bottom-alt:auto;mso-list:l0 level1 lfo3">
<span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;">You first use &quot;VS&quot; in Section 3.6. &n=
bsp;I'm assuming this is related to &quot;virtual subnet&quot;, but there's=
 no explicit association.</span><span lang=3D"EN-US"><o:p></o:p></span></li=
></ol>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;">I see that you expanded in 3.6, but no=
w VS is used for the first time in 3.8 w/out explicitly expanding.<o:p></o:=
p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;">Solution: in 3.6 &nbsp;s/Virtual Subne=
t/Virtual Subnet (VS)<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;"><o:p>&nbsp;</o:p></span></p>
</div>
</div>
</div>
</body>
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Subject: [bess] I-D Action: draft-ietf-bess-virtual-subnet-04.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
 This draft is a work item of the BGP Enabled Services Working Group of the IETF.

        Title           : Virtual Subnet: A BGP/MPLS IP VPN-based Subnet Extension Solution
        Authors         : Xiaohu Xu
                          Robert Raszuk
                          Christian Jacquenet
                          Truman Boyes
                          Brendan Fee
	Filename        : draft-ietf-bess-virtual-subnet-04.txt
	Pages           : 14
	Date            : 2015-11-10

Abstract:
   This document describes a BGP/MPLS IP VPN-based subnet extension
   solution referred to as Virtual Subnet, which can be used for
   building Layer 3 network virtualization overlays within and/or
   between data centers.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-virtual-subnet/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-bess-virtual-subnet-04

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-virtual-subnet-04


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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From: Haoweiguo <haoweiguo@huawei.com>
To: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>, "sajassi@cisco.com" <sajassi@cisco.com>, "jdrake@juniper.net" <jdrake@juniper.net>
Thread-Topic: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
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Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
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Jorge,

Thanks for your explanations. However, i still can't understand, i'm sorry.

RFC 5512 only defines IP tunnel type and encapsulation attribute, like L2TP=
v3,GRE and IP in IP.  For RFC 5512, MPLS tunnel doesn't need to be defined =
specifically, it is default case. In RFC 7432, the tunnel type 10 also hasn=
't been defined. Later, when the EVPN for overlay network solution was prop=
osed, the tunnel type 10 was introduced to differentiate MPLS tunnel and VX=
LAN/NVGRE/MPLS Over GRE tunnel, because same route type 1,2,3,4 and 5 are u=
sed in both RFC 7432 and the draft 'draft-ietf-bess-evpn-overlay-02'. We ne=
ed the tunnel type to clearly notify peer EVPN PE which tunnel(including MP=
LS tunnel type) should be used.  So it introduced updates on RFC 7432 and w=
ill incur some interoperbility issue for RFC 7432. Am i right?

Thanks,

weiguo



________________________________

From: BESS [bess-bounces@ietf.org] on behalf of Rabadan, Jorge (Jorge) [jor=
ge.rabadan@alcatel-lucent.com]
Sent: Wednesday, November 11, 2015 0:01
To: Haoweiguo; sajassi@cisco.com; jdrake@juniper.net
Cc: bess@ietf.org
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'

Weiguo,

There are already implementations using value 10 in the RFC5512 BGP encap e=
xt community.
That is the value you would have in RFC7432 compliant networks where you ca=
n also have overlay tunnels. Value 10 would indicate to the ingress PE that=
 the route needs an MPLS tunnel to be resolved.

Thx
Jorge

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>
Date: Tuesday, November 10, 2015 at 1:05 AM
To: "sajassi@cisco.com<mailto:sajassi@cisco.com>" <sajassi@cisco.com<mailto=
:sajassi@cisco.com>>, "jdrake@juniper.net<mailto:jdrake@juniper.net>" <jdra=
ke@juniper.net<mailto:jdrake@juniper.net>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'


Hi Ali & John,

The draft of 'draft-ietf-bess-evpn-overlay-02' describes how EVPN can be us=
ed for Overlay network, the overlay network includes VXLAN, NVGRE and MPLS =
Over GRE.

In section 13 IANA considerations, several overlay tunnel types are request=
ed as follows:

8    VXLAN Encapsulation
9    NVGRE Encapsulation
10   MPLS Encapsulation   (?)
11   MPLS in GRE Encapsulation
12   VXLAN GPE Encapsulation



IMO, 8,9,11 and 12 are all overlay encapsulations, 10 is an exception. Woul=
d you like to explain what's the purpose of tunnel type 10?



Thanks,

weiguo


--_000_DD5FC8DE455C3348B94340C0AB5517334F8D6C1Bnkgeml501mbschi_
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<html dir=3D"ltr">
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"FONT-FAMILY: Avenir,sans-serif; WORD-WRAP: break-word; COLOR=
: rgb(0,0,0); FONT-SIZE: 15px" fPStyle=3D"1" ocsi=3D"0">
<div style=3D"FONT-FAMILY: Tahoma; DIRECTION: ltr; COLOR: #000000; FONT-SIZ=
E: 10pt">
<font size=3D"3" face=3D"Calibri">
<p><font size=3D"3" face=3D"Calibri">Jorge,</font></p>
<p><font size=3D"3" face=3D"Calibri">Thanks for your explanations. However,=
 i still can't understand, i'm sorry.</font></p>
<p><font size=3D"3" face=3D"Calibri">RFC 5512 only defines IP tunnel type a=
nd encapsulation attribute, like L2TPv3,GRE and IP in IP.&nbsp; For RFC 551=
2, MPLS tunnel doesn't need to be defined specifically, it is default case.=
 In RFC 7432, the tunnel type 10 also hasn't
 been defined. Later, when the EVPN for overlay network solution was propos=
ed, the tunnel type 10 was introduced to differentiate MPLS tunnel and VXLA=
N/NVGRE/MPLS Over GRE tunnel, because&nbsp;same route type 1,2,3,4 and 5 ar=
e used in both RFC 7432 and the draft
 'draft-ietf-bess-evpn-overlay-02'. We need the tunnel type to clearly noti=
fy peer EVPN PE which tunnel(including MPLS tunnel type) should be used.&nb=
sp; So it introduced updates on RFC 7432 and will incur some interoperbilit=
y issue for RFC 7432. Am i right?</font></p>
<p><font size=3D"3" face=3D"Calibri">Thanks,</font></p>
<p><font size=3D"3" face=3D"Calibri">weiguo</font></p>
<p></font>&nbsp;</p>
<hr tabindex=3D"-1">
<p></p>
<div style=3D"FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px=
">
<div style=3D"DIRECTION: ltr" id=3D"divRpF357510"><font color=3D"#000000" s=
ize=3D"2" face=3D"Tahoma"><b>From:</b> BESS [bess-bounces@ietf.org] on beha=
lf of Rabadan, Jorge (Jorge) [jorge.rabadan@alcatel-lucent.com]<br>
<b>Sent:</b> Wednesday, November 11, 2015 0:01<br>
<b>To:</b> Haoweiguo; sajassi@cisco.com; jdrake@juniper.net<br>
<b>Cc:</b> bess@ietf.org<br>
<b>Subject:</b> Re: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'<br>
</font><br>
</div>
<div></div>
<div>
<div>
<div>
<div>Weiguo,&nbsp;</div>
<div><br>
</div>
<div>There are already implementations using value 10 in the RFC5512 BGP en=
cap ext community.</div>
<div>That is the value you would have in RFC7432 compliant networks where y=
ou can also have overlay tunnels. Value 10 would indicate to the ingress PE=
 that the route needs an MPLS tunnel to be resolved.</div>
<div><br>
</div>
<div>Thx</div>
<div>Jorge</div>
<div>
<div id=3D"MAC_OUTLOOK_SIGNATURE"></div>
</div>
</div>
</div>
<div><br>
</div>
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-FAMILY: Calibri; COLOR: black; FONT-SIZE: 12pt; BORDER-TOP: #b5c4df 1pt so=
lid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"FONT-WEIGHT: bold">From: </span>BESS &lt;<a href=3D"mailto:b=
ess-bounces@ietf.org" target=3D"_blank">bess-bounces@ietf.org</a>&gt; on be=
half of Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com" target=3D"_bl=
ank">haoweiguo@huawei.com</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Date: </span>Tuesday, November 10, 2015 a=
t 1:05 AM<br>
<span style=3D"FONT-WEIGHT: bold">To: </span>&quot;<a href=3D"mailto:sajass=
i@cisco.com" target=3D"_blank">sajassi@cisco.com</a>&quot; &lt;<a href=3D"m=
ailto:sajassi@cisco.com" target=3D"_blank">sajassi@cisco.com</a>&gt;, &quot=
;<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@juniper.net=
</a>&quot;
 &lt;<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@juniper=
.net</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Cc: </span>&quot;<a href=3D"mailto:bess@i=
etf.org" target=3D"_blank">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:be=
ss@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Subject: </span>[bess] One question about=
 'draft-ietf-bess-evpn-overlay-02'<br>
</div>
<div><br>
</div>
<blockquote style=3D"BORDER-LEFT: #b5c4df 5px solid; PADDING-BOTTOM: 0px; M=
ARGIN: 0px 0px 0px 5px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; PADDING-TOP:=
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<div dir=3D"ltr"><style id=3D"owaParaStyle">P {
	MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
P {
	MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
</style>
<div>
<div style=3D"FONT-FAMILY: Tahoma; DIRECTION: ltr; COLOR: #000000; FONT-SIZ=
E: 10pt">
<p><font size=3D"3" face=3D"Calibri">Hi Ali &amp; John,</font></p>
<p><font size=3D"3" face=3D"Calibri">The draft of 'draft-ietf-bess-evpn-ove=
rlay-02' describes how EVPN can be used for Overlay network, the overlay ne=
twork includes VXLAN, NVGRE and MPLS Over GRE.</font></p>
<p><font size=3D"3" face=3D"Calibri">In section 13 IANA considerations, sev=
eral overlay tunnel types are requested as follows:</font></p>
<p><font size=3D"3" face=3D"Calibri">8&nbsp;&nbsp;&nbsp; VXLAN Encapsulatio=
n<br>
9&nbsp;&nbsp;&nbsp; NVGRE Encapsulation<br>
10&nbsp;&nbsp; MPLS Encapsulation&nbsp;&nbsp; (?)<br>
11&nbsp;&nbsp; MPLS in GRE Encapsulation<br>
12&nbsp;&nbsp; VXLAN GPE Encapsulation</font></p>
<p><font size=3D"3" face=3D"Calibri"></font>&nbsp;</p>
<p><font size=3D"3" face=3D"Calibri">IMO, 8,9,11 and 12 are all overlay enc=
apsulations, 10 is an exception. Would you like to explain what's the purpo=
se of tunnel type 10?</font></p>
<p><font size=3D"3" face=3D"Calibri"></font>&nbsp;</p>
<p><font size=3D"3" face=3D"Calibri">Thanks,</font></p>
<p><font size=3D"3" face=3D"Calibri">weiguo<br>
<br>
</font></p>
</div>
</div>
</div>
</blockquote>
</span></div>
</div>
</div>
</body>
</html>

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From: Haoweiguo <haoweiguo@huawei.com>
To: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>, "sajassi@cisco.com" <sajassi@cisco.com>, "jdrake@juniper.net" <jdrake@juniper.net>
Thread-Topic: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
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Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
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--_000_DD5FC8DE455C3348B94340C0AB5517334F8D6C5Bnkgeml501mbschi_
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Jorge,

Understood, many thanks. Now that the default tunnel encapsulation is MPLS =
encapsulation, the tunnel type 10 seems to be unneccessary. So is the intro=
duction of tunnel type 10 just for further removing ambiguity? If i don't u=
se the tunnel type 10 in MPLS based EVPN implementation(RFC 7432), it will =
also never incur any issue. Am i right?



Thanks,

weiguo

________________________________
From: BESS [bess-bounces@ietf.org] on behalf of Rabadan, Jorge (Jorge) [jor=
ge.rabadan@alcatel-lucent.com]
Sent: Wednesday, November 11, 2015 11:47
To: Haoweiguo; sajassi@cisco.com; jdrake@juniper.net
Cc: bess@ietf.org
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'

Weiguo,

Well, if an RFC7432 implementation does not use the RFC5512 ext community, =
the following sentence in the evan-overlay draft should help interoperabili=
ty. I personally don=92t see any issues.


If the BGP Encapsulation extended community is not present, then the
   default MPLS encapsulation or a statically configured encapsulation
   is assumed.

Thanks.
Jorge

From: Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>
Date: Tuesday, November 10, 2015 at 7:03 PM
To: Jorge Rabadan <jorge.rabadan@alcatel-lucent.com<mailto:jorge.rabadan@al=
catel-lucent.com>>, "sajassi@cisco.com<mailto:sajassi@cisco.com>" <sajassi@=
cisco.com<mailto:sajassi@cisco.com>>, "jdrake@juniper.net<mailto:jdrake@jun=
iper.net>" <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: RE: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'


Jorge,

Thanks for your explanations. However, i still can't understand, i'm sorry.

RFC 5512 only defines IP tunnel type and encapsulation attribute, like L2TP=
v3,GRE and IP in IP.  For RFC 5512, MPLS tunnel doesn't need to be defined =
specifically, it is default case. In RFC 7432, the tunnel type 10 also hasn=
't been defined. Later, when the EVPN for overlay network solution was prop=
osed, the tunnel type 10 was introduced to differentiate MPLS tunnel and VX=
LAN/NVGRE/MPLS Over GRE tunnel, because same route type 1,2,3,4 and 5 are u=
sed in both RFC 7432 and the draft 'draft-ietf-bess-evpn-overlay-02'. We ne=
ed the tunnel type to clearly notify peer EVPN PE which tunnel(including MP=
LS tunnel type) should be used.  So it introduced updates on RFC 7432 and w=
ill incur some interoperbility issue for RFC 7432. Am i right?

Thanks,

weiguo



________________________________

From: BESS [bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>] on behalf =
of Rabadan, Jorge (Jorge) [jorge.rabadan@alcatel-lucent.com<mailto:jorge.ra=
badan@alcatel-lucent.com>]
Sent: Wednesday, November 11, 2015 0:01
To: Haoweiguo; sajassi@cisco.com<mailto:sajassi@cisco.com>; jdrake@juniper.=
net<mailto:jdrake@juniper.net>
Cc: bess@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'

Weiguo,

There are already implementations using value 10 in the RFC5512 BGP encap e=
xt community.
That is the value you would have in RFC7432 compliant networks where you ca=
n also have overlay tunnels. Value 10 would indicate to the ingress PE that=
 the route needs an MPLS tunnel to be resolved.

Thx
Jorge

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>
Date: Tuesday, November 10, 2015 at 1:05 AM
To: "sajassi@cisco.com<mailto:sajassi@cisco.com>" <sajassi@cisco.com<mailto=
:sajassi@cisco.com>>, "jdrake@juniper.net<mailto:jdrake@juniper.net>" <jdra=
ke@juniper.net<mailto:jdrake@juniper.net>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'


Hi Ali & John,

The draft of 'draft-ietf-bess-evpn-overlay-02' describes how EVPN can be us=
ed for Overlay network, the overlay network includes VXLAN, NVGRE and MPLS =
Over GRE.

In section 13 IANA considerations, several overlay tunnel types are request=
ed as follows:

8    VXLAN Encapsulation
9    NVGRE Encapsulation
10   MPLS Encapsulation   (?)
11   MPLS in GRE Encapsulation
12   VXLAN GPE Encapsulation



IMO, 8,9,11 and 12 are all overlay encapsulations, 10 is an exception. Woul=
d you like to explain what's the purpose of tunnel type 10?



Thanks,

weiguo


--_000_DD5FC8DE455C3348B94340C0AB5517334F8D6C5Bnkgeml501mbschi_
Content-Type: text/html; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

<html dir=3D"ltr">
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
</head>
<body style=3D"FONT-FAMILY: Avenir,sans-serif; WORD-WRAP: break-word; COLOR=
: rgb(0,0,0); FONT-SIZE: 15px" fPStyle=3D"1" ocsi=3D"0">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">
<p><font size=3D"3" face=3D"Calibri">Jorge,</font></p>
<p><font size=3D"3" face=3D"Calibri">Understood, many thanks. Now that the =
default tunnel encapsulation is MPLS encapsulation, the tunnel type 10 seem=
s to be unneccessary. So is the introduction of tunnel type 10 just for fur=
ther removing ambiguity? If i don't
 use the tunnel type 10 in MPLS based EVPN implementation(RFC 7432), it wil=
l also never incur any issue. Am i right?</font></p>
<p><font size=3D"3" face=3D"Calibri"></font>&nbsp;</p>
<p><font size=3D"3" face=3D"Calibri">Thanks,</font></p>
<p><font size=3D"3" face=3D"Calibri">weiguo</font></p>
<div style=3D"FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px=
">
<hr tabindex=3D"-1">
<div style=3D"DIRECTION: ltr" id=3D"divRpF728179"><font color=3D"#000000" s=
ize=3D"2" face=3D"Tahoma"><b>From:</b> BESS [bess-bounces@ietf.org] on beha=
lf of Rabadan, Jorge (Jorge) [jorge.rabadan@alcatel-lucent.com]<br>
<b>Sent:</b> Wednesday, November 11, 2015 11:47<br>
<b>To:</b> Haoweiguo; sajassi@cisco.com; jdrake@juniper.net<br>
<b>Cc:</b> bess@ietf.org<br>
<b>Subject:</b> Re: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'<br>
</font><br>
</div>
<div></div>
<div>
<div>
<div>
<div>Weiguo,</div>
<div><br>
</div>
<div>Well, if an RFC7432 implementation does not use the RFC5512 ext commun=
ity, the following sentence in the evan-overlay draft should help interoper=
ability. I personally don=92t see any issues.</div>
</div>
</div>
<div><br>
</div>
<div>
<pre style=3D"PAGE-BREAK-BEFORE: always; MARGIN-TOP: 0px; MARGIN-BOTTOM: 0p=
x; FONT-SIZE: 13px" class=3D"newpage">If the BGP Encapsulation extended com=
munity is not present, then the
   default MPLS encapsulation or a statically configured encapsulation
   is assumed.</pre>
</div>
<div><br>
</div>
<div>Thanks.</div>
<div>Jorge</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"BORDER-BOTTOM: medium none; TEXT-ALIGN: left; BORDER-LEFT: me=
dium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; FONT=
-FAMILY: Calibri; COLOR: black; FONT-SIZE: 12pt; BORDER-TOP: #b5c4df 1pt so=
lid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"FONT-WEIGHT: bold">From: </span>Haoweiguo &lt;<a href=3D"mai=
lto:haoweiguo@huawei.com" target=3D"_blank">haoweiguo@huawei.com</a>&gt;<br=
>
<span style=3D"FONT-WEIGHT: bold">Date: </span>Tuesday, November 10, 2015 a=
t 7:03 PM<br>
<span style=3D"FONT-WEIGHT: bold">To: </span>Jorge Rabadan &lt;<a href=3D"m=
ailto:jorge.rabadan@alcatel-lucent.com" target=3D"_blank">jorge.rabadan@alc=
atel-lucent.com</a>&gt;, &quot;<a href=3D"mailto:sajassi@cisco.com" target=
=3D"_blank">sajassi@cisco.com</a>&quot; &lt;<a href=3D"mailto:sajassi@cisco=
.com" target=3D"_blank">sajassi@cisco.com</a>&gt;,
 &quot;<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@junip=
er.net</a>&quot; &lt;<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank=
">jdrake@juniper.net</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Cc: </span>&quot;<a href=3D"mailto:bess@i=
etf.org" target=3D"_blank">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:be=
ss@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Subject: </span>RE: [bess] One question a=
bout 'draft-ietf-bess-evpn-overlay-02'<br>
</div>
<div><br>
</div>
<blockquote style=3D"BORDER-LEFT: #b5c4df 5px solid; PADDING-BOTTOM: 0px; M=
ARGIN: 0px 0px 0px 5px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; PADDING-TOP:=
 0px" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div dir=3D"ltr">
<div style=3D"FONT-FAMILY: Avenir,sans-serif; WORD-WRAP: break-word; COLOR:=
 rgb(0,0,0); FONT-SIZE: 15px">
<div style=3D"FONT-FAMILY: Tahoma; DIRECTION: ltr; COLOR: #000000; FONT-SIZ=
E: 10pt">
<font size=3D"3" face=3D"Calibri">
<p><font size=3D"3" face=3D"Calibri">Jorge,</font></p>
<p><font size=3D"3" face=3D"Calibri">Thanks for your explanations. However,=
 i still can't understand, i'm sorry.</font></p>
<p><font size=3D"3" face=3D"Calibri">RFC 5512 only defines IP tunnel type a=
nd encapsulation attribute, like L2TPv3,GRE and IP in IP.&nbsp; For RFC 551=
2, MPLS tunnel doesn't need to be defined specifically, it is default case.=
 In RFC 7432, the tunnel type 10 also hasn't
 been defined. Later, when the EVPN for overlay network solution was propos=
ed, the tunnel type 10 was introduced to differentiate MPLS tunnel and VXLA=
N/NVGRE/MPLS Over GRE tunnel, because&nbsp;same route type 1,2,3,4 and 5 ar=
e used in both RFC 7432 and the draft
 'draft-ietf-bess-evpn-overlay-02'. We need the tunnel type to clearly noti=
fy peer EVPN PE which tunnel(including MPLS tunnel type) should be used.&nb=
sp; So it introduced updates on RFC 7432 and will incur some interoperbilit=
y issue for RFC 7432. Am i right?</font></p>
<p><font size=3D"3" face=3D"Calibri">Thanks,</font></p>
<p><font size=3D"3" face=3D"Calibri">weiguo</font></p>
</font>
<p><font size=3D"3" face=3D"Calibri"></font>&nbsp;</p>
<hr tabindex=3D"-1">
<p></p>
<div style=3D"FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px=
">
<div style=3D"DIRECTION: ltr" id=3D"divRpF357510"><font color=3D"#000000" s=
ize=3D"2" face=3D"Tahoma"><b>From:</b> BESS [<a href=3D"mailto:bess-bounces=
@ietf.org" target=3D"_blank">bess-bounces@ietf.org</a>] on behalf of Rabada=
n, Jorge (Jorge) [<a href=3D"mailto:jorge.rabadan@alcatel-lucent.com" targe=
t=3D"_blank">jorge.rabadan@alcatel-lucent.com</a>]<br>
<b>Sent:</b> Wednesday, November 11, 2015 0:01<br>
<b>To:</b> Haoweiguo; <a href=3D"mailto:sajassi@cisco.com" target=3D"_blank=
">sajassi@cisco.com</a>;
<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@juniper.net<=
/a><br>
<b>Cc:</b> <a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org=
</a><br>
<b>Subject:</b> Re: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'<br>
</font><br>
</div>
<div></div>
<div>
<div>
<div>
<div>Weiguo,&nbsp;</div>
<div><br>
</div>
<div>There are already implementations using value 10 in the RFC5512 BGP en=
cap ext community.</div>
<div>That is the value you would have in RFC7432 compliant networks where y=
ou can also have overlay tunnels. Value 10 would indicate to the ingress PE=
 that the route needs an MPLS tunnel to be resolved.</div>
<div><br>
</div>
<div>Thx</div>
<div>Jorge</div>
<div>
<div></div>
</div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"BORDER-BOTTOM: medium none; TEXT-ALIGN: left; BORDER-LEFT: me=
dium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; FONT=
-FAMILY: Calibri; COLOR: black; FONT-SIZE: 12pt; BORDER-TOP: #b5c4df 1pt so=
lid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"FONT-WEIGHT: bold">From: </span>BESS &lt;<a href=3D"mailto:b=
ess-bounces@ietf.org" target=3D"_blank">bess-bounces@ietf.org</a>&gt; on be=
half of Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com" target=3D"_bl=
ank">haoweiguo@huawei.com</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Date: </span>Tuesday, November 10, 2015 a=
t 1:05 AM<br>
<span style=3D"FONT-WEIGHT: bold">To: </span>&quot;<a href=3D"mailto:sajass=
i@cisco.com" target=3D"_blank">sajassi@cisco.com</a>&quot; &lt;<a href=3D"m=
ailto:sajassi@cisco.com" target=3D"_blank">sajassi@cisco.com</a>&gt;, &quot=
;<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@juniper.net=
</a>&quot;
 &lt;<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@juniper=
.net</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Cc: </span>&quot;<a href=3D"mailto:bess@i=
etf.org" target=3D"_blank">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:be=
ss@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Subject: </span>[bess] One question about=
 'draft-ietf-bess-evpn-overlay-02'<br>
</div>
<div><br>
</div>
<blockquote style=3D"BORDER-LEFT: #b5c4df 5px solid; PADDING-BOTTOM: 0px; M=
ARGIN: 0px 0px 0px 5px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; PADDING-TOP:=
 0px" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div dir=3D"ltr"><style id=3D"owaParaStyle">P {
	MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
P {
	MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
</style>
<div>
<div style=3D"FONT-FAMILY: Tahoma; DIRECTION: ltr; COLOR: #000000; FONT-SIZ=
E: 10pt">
<p><font size=3D"3" face=3D"Calibri">Hi Ali &amp; John,</font></p>
<p><font size=3D"3" face=3D"Calibri">The draft of 'draft-ietf-bess-evpn-ove=
rlay-02' describes how EVPN can be used for Overlay network, the overlay ne=
twork includes VXLAN, NVGRE and MPLS Over GRE.</font></p>
<p><font size=3D"3" face=3D"Calibri">In section 13 IANA considerations, sev=
eral overlay tunnel types are requested as follows:</font></p>
<p><font size=3D"3" face=3D"Calibri">8&nbsp;&nbsp;&nbsp; VXLAN Encapsulatio=
n<br>
9&nbsp;&nbsp;&nbsp; NVGRE Encapsulation<br>
10&nbsp;&nbsp; MPLS Encapsulation&nbsp;&nbsp; (?)<br>
11&nbsp;&nbsp; MPLS in GRE Encapsulation<br>
12&nbsp;&nbsp; VXLAN GPE Encapsulation</font></p>
<p><font size=3D"3" face=3D"Calibri"></font>&nbsp;</p>
<p><font size=3D"3" face=3D"Calibri">IMO, 8,9,11 and 12 are all overlay enc=
apsulations, 10 is an exception. Would you like to explain what's the purpo=
se of tunnel type 10?</font></p>
<p><font size=3D"3" face=3D"Calibri"></font>&nbsp;</p>
<p><font size=3D"3" face=3D"Calibri">Thanks,</font></p>
<p><font size=3D"3" face=3D"Calibri">weiguo<br>
<br>
</font></p>
</div>
</div>
</div>
</blockquote>
</span></div>
</div>
</div>
</div>
</div>
</blockquote>
</span></div>
</div>
</div>
</body>
</html>

--_000_DD5FC8DE455C3348B94340C0AB5517334F8D6C5Bnkgeml501mbschi_--


From nobody Wed Nov 11 00:35:39 2015
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Subject: [bess] I-D Action: draft-ietf-bess-virtual-subnet-05.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
 This draft is a work item of the BGP Enabled Services Working Group of the IETF.

        Title           : Virtual Subnet: A BGP/MPLS IP VPN-based Subnet Extension Solution
        Authors         : Xiaohu Xu
                          Robert Raszuk
                          Christian Jacquenet
                          Truman Boyes
                          Brendan Fee
	Filename        : draft-ietf-bess-virtual-subnet-05.txt
	Pages           : 14
	Date            : 2015-11-11

Abstract:
   This document describes a BGP/MPLS IP VPN-based subnet extension
   solution referred to as Virtual Subnet, which can be used for
   building Layer 3 network virtualization overlays within and/or
   between data centers.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-virtual-subnet/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-bess-virtual-subnet-05

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-virtual-subnet-05


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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From: John E Drake <jdrake@juniper.net>
To: Haoweiguo <haoweiguo@huawei.com>, "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>, "sajassi@cisco.com" <sajassi@cisco.com>
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Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
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Weiguo,

It is needed in order to distinguish between an advertising node that only =
supports non-MPLS encapsulations and one that supports MPLS and non-MPLS en=
capsulations.  An advertising node that only supports MPLS encapsulation do=
es not need to advertise anything.

Yours Irrespectively,

John

From: Haoweiguo [mailto:haoweiguo@huawei.com]
Sent: Wednesday, November 11, 2015 1:08 AM
To: Rabadan, Jorge (Jorge); sajassi@cisco.com; John E Drake
Cc: bess@ietf.org
Subject: RE: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'


Jorge,

Understood, many thanks. Now that the default tunnel encapsulation is MPLS =
encapsulation, the tunnel type 10 seems to be unneccessary. So is the intro=
duction of tunnel type 10 just for further removing ambiguity? If i don't u=
se the tunnel type 10 in MPLS based EVPN implementation(RFC 7432), it will =
also never incur any issue. Am i right?



Thanks,

weiguo

________________________________
From: BESS [bess-bounces@ietf.org] on behalf of Rabadan, Jorge (Jorge) [jor=
ge.rabadan@alcatel-lucent.com]
Sent: Wednesday, November 11, 2015 11:47
To: Haoweiguo; sajassi@cisco.com<mailto:sajassi@cisco.com>; jdrake@juniper.=
net<mailto:jdrake@juniper.net>
Cc: bess@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
Weiguo,

Well, if an RFC7432 implementation does not use the RFC5512 ext community, =
the following sentence in the evan-overlay draft should help interoperabili=
ty. I personally don't see any issues.


If the BGP Encapsulation extended community is not present, then the

   default MPLS encapsulation or a statically configured encapsulation

   is assumed.

Thanks.
Jorge

From: Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>
Date: Tuesday, November 10, 2015 at 7:03 PM
To: Jorge Rabadan <jorge.rabadan@alcatel-lucent.com<mailto:jorge.rabadan@al=
catel-lucent.com>>, "sajassi@cisco.com<mailto:sajassi@cisco.com>" <sajassi@=
cisco.com<mailto:sajassi@cisco.com>>, "jdrake@juniper.net<mailto:jdrake@jun=
iper.net>" <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: RE: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'


Jorge,

Thanks for your explanations. However, i still can't understand, i'm sorry.

RFC 5512 only defines IP tunnel type and encapsulation attribute, like L2TP=
v3,GRE and IP in IP.  For RFC 5512, MPLS tunnel doesn't need to be defined =
specifically, it is default case. In RFC 7432, the tunnel type 10 also hasn=
't been defined. Later, when the EVPN for overlay network solution was prop=
osed, the tunnel type 10 was introduced to differentiate MPLS tunnel and VX=
LAN/NVGRE/MPLS Over GRE tunnel, because same route type 1,2,3,4 and 5 are u=
sed in both RFC 7432 and the draft 'draft-ietf-bess-evpn-overlay-02'. We ne=
ed the tunnel type to clearly notify peer EVPN PE which tunnel(including MP=
LS tunnel type) should be used.  So it introduced updates on RFC 7432 and w=
ill incur some interoperbility issue for RFC 7432. Am i right?

Thanks,

weiguo



________________________________
From: BESS [bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>] on behalf =
of Rabadan, Jorge (Jorge) [jorge.rabadan@alcatel-lucent.com<mailto:jorge.ra=
badan@alcatel-lucent.com>]
Sent: Wednesday, November 11, 2015 0:01
To: Haoweiguo; sajassi@cisco.com<mailto:sajassi@cisco.com>; jdrake@juniper.=
net<mailto:jdrake@juniper.net>
Cc: bess@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
Weiguo,

There are already implementations using value 10 in the RFC5512 BGP encap e=
xt community.
That is the value you would have in RFC7432 compliant networks where you ca=
n also have overlay tunnels. Value 10 would indicate to the ingress PE that=
 the route needs an MPLS tunnel to be resolved.

Thx
Jorge

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>
Date: Tuesday, November 10, 2015 at 1:05 AM
To: "sajassi@cisco.com<mailto:sajassi@cisco.com>" <sajassi@cisco.com<mailto=
:sajassi@cisco.com>>, "jdrake@juniper.net<mailto:jdrake@juniper.net>" <jdra=
ke@juniper.net<mailto:jdrake@juniper.net>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'


Hi Ali & John,

The draft of 'draft-ietf-bess-evpn-overlay-02' describes how EVPN can be us=
ed for Overlay network, the overlay network includes VXLAN, NVGRE and MPLS =
Over GRE.

In section 13 IANA considerations, several overlay tunnel types are request=
ed as follows:

8    VXLAN Encapsulation
9    NVGRE Encapsulation
10   MPLS Encapsulation   (?)
11   MPLS in GRE Encapsulation
12   VXLAN GPE Encapsulation



IMO, 8,9,11 and 12 are all overlay encapsulations, 10 is an exception. Woul=
d you like to explain what's the purpose of tunnel type 10?



Thanks,

weiguo

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</head>
<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Weiguo,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">It is needed in order to distinguish =
between an advertising node that only supports non-MPLS encapsulations and =
one that supports MPLS and non-MPLS encapsulations.&nbsp;
 An advertising node that only supports MPLS encapsulation does not need to=
 advertise anything.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Haoweiguo [mailto:haoweiguo@hu=
awei.com]
<br>
<b>Sent:</b> Wednesday, November 11, 2015 1:08 AM<br>
<b>To:</b> Rabadan, Jorge (Jorge); sajassi@cisco.com; John E Drake<br>
<b>Cc:</b> bess@ietf.org<br>
<b>Subject:</b> RE: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">J=
orge,</span><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">U=
nderstood, many thanks. Now that the default tunnel encapsulation is MPLS e=
ncapsulation, the tunnel type 10 seems to be unneccessary. So is the introd=
uction of tunnel type 10 just for further removing
 ambiguity? If i don't use the tunnel type 10 in MPLS based EVPN implementa=
tion(RFC 7432), it will also never incur any issue. Am i right?</span><span=
 style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:=
black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-seri=
f;color:black">&nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
hanks,</span><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;=
,sans-serif;color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">w=
eiguo</span><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black"><o:p></o:p></span></p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"color:black">
<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
<div id=3D"divRpF728179">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">From:<=
/span></b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sa=
ns-serif;color:black"> BESS [bess-bounces@ietf.org] on behalf
 of Rabadan, Jorge (Jorge) [jorge.rabadan@alcatel-lucent.com]<br>
<b>Sent:</b> Wednesday, November 11, 2015 11:47<br>
<b>To:</b> Haoweiguo; <a href=3D"mailto:sajassi@cisco.com">sajassi@cisco.co=
m</a>; <a href=3D"mailto:jdrake@juniper.net">
jdrake@juniper.net</a><br>
<b>Cc:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> Re: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Weiguo,<o:p></o:p></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Well, if an RFC7432 impl=
ementation does not use the RFC5512 ext community, the following sentence i=
n the evan-overlay draft should help interoperability. I personally don&#82=
17;t see any issues.<o:p></o:p></span></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
</div>
<div>
<pre style=3D"page-break-before:always"><span style=3D"color:black">If the =
BGP Encapsulation extended community is not present, then the<o:p></o:p></s=
pan></pre>
<pre style=3D"page-break-before:always"><span style=3D"color:black">&nbsp;&=
nbsp; default MPLS encapsulation or a statically configured encapsulation<o=
:p></o:p></span></pre>
<pre style=3D"page-break-before:always"><span style=3D"color:black">&nbsp;&=
nbsp; is assumed.<o:p></o:p></span></pre>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Thanks.<o:p></o:p></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Jorge<o:p></o:p></span><=
/p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:=
black">Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com" target=3D"_bla=
nk">haoweiguo@huawei.com</a>&gt;<br>
<b>Date: </b>Tuesday, November 10, 2015 at 7:03 PM<br>
<b>To: </b>Jorge Rabadan &lt;<a href=3D"mailto:jorge.rabadan@alcatel-lucent=
.com" target=3D"_blank">jorge.rabadan@alcatel-lucent.com</a>&gt;, &quot;<a =
href=3D"mailto:sajassi@cisco.com" target=3D"_blank">sajassi@cisco.com</a>&q=
uot; &lt;<a href=3D"mailto:sajassi@cisco.com" target=3D"_blank">sajassi@cis=
co.com</a>&gt;,
 &quot;<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@junip=
er.net</a>&quot; &lt;<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank=
">jdrake@juniper.net</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>RE: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">J=
orge,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
hanks for your explanations. However, i still can't understand, i'm sorry.<=
o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">R=
FC 5512 only defines IP tunnel type and encapsulation attribute, like L2TPv=
3,GRE and IP in IP.&nbsp; For RFC 5512, MPLS tunnel doesn't need to be defi=
ned specifically, it is default case. In RFC 7432,
 the tunnel type 10 also hasn't been defined. Later, when the EVPN for over=
lay network solution was proposed, the tunnel type 10 was introduced to dif=
ferentiate MPLS tunnel and VXLAN/NVGRE/MPLS Over GRE tunnel, because&nbsp;s=
ame route type 1,2,3,4 and 5 are used
 in both RFC 7432 and the draft 'draft-ietf-bess-evpn-overlay-02'. We need =
the tunnel type to clearly notify peer EVPN PE which tunnel(including MPLS =
tunnel type) should be used.&nbsp; So it introduced updates on RFC 7432 and=
 will incur some interoperbility issue
 for RFC 7432. Am i right?<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
hanks,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">w=
eiguo<o:p></o:p></span></p>
<p><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-seri=
f;color:black">&nbsp;<o:p></o:p></span></p>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:=
black">
<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
<div>
<div id=3D"divRpF357510">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">From:<=
/span></b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sa=
ns-serif;color:black"> BESS [<a href=3D"mailto:bess-bounces@ietf.org" targe=
t=3D"_blank">bess-bounces@ietf.org</a>]
 on behalf of Rabadan, Jorge (Jorge) [<a href=3D"mailto:jorge.rabadan@alcat=
el-lucent.com" target=3D"_blank">jorge.rabadan@alcatel-lucent.com</a>]<br>
<b>Sent:</b> Wednesday, November 11, 2015 0:01<br>
<b>To:</b> Haoweiguo; <a href=3D"mailto:sajassi@cisco.com" target=3D"_blank=
">sajassi@cisco.com</a>;
<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@juniper.net<=
/a><br>
<b>Cc:</b> <a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org=
</a><br>
<b>Subject:</b> Re: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Weiguo,&nbsp;<o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">There are already implem=
entations using value 10 in the RFC5512 BGP encap ext community.<o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">That is the value you wo=
uld have in RFC7432 compliant networks where you can also have overlay tunn=
els. Value 10 would indicate to the ingress PE that the route needs an MPLS=
 tunnel to be resolved.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Thx<o:p></o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Jorge<o:p></o:p></span><=
/p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:=
black">BESS &lt;<a href=3D"mailto:bess-bounces@ietf.org" target=3D"_blank">=
bess-bounces@ietf.org</a>&gt; on behalf of Haoweiguo &lt;<a href=3D"mailto:=
haoweiguo@huawei.com" target=3D"_blank">haoweiguo@huawei.com</a>&gt;<br>
<b>Date: </b>Tuesday, November 10, 2015 at 1:05 AM<br>
<b>To: </b>&quot;<a href=3D"mailto:sajassi@cisco.com" target=3D"_blank">saj=
assi@cisco.com</a>&quot; &lt;<a href=3D"mailto:sajassi@cisco.com" target=3D=
"_blank">sajassi@cisco.com</a>&gt;, &quot;<a href=3D"mailto:jdrake@juniper.=
net" target=3D"_blank">jdrake@juniper.net</a>&quot; &lt;<a href=3D"mailto:j=
drake@juniper.net" target=3D"_blank">jdrake@juniper.net</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>[bess] One question about 'draft-ietf-bess-evpn-overlay-02'=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">H=
i Ali &amp; John,</span><span style=3D"font-size:10.0pt;font-family:&quot;T=
ahoma&quot;,sans-serif;color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
he draft of 'draft-ietf-bess-evpn-overlay-02' describes how EVPN can be use=
d for Overlay network, the overlay network includes VXLAN, NVGRE and MPLS O=
ver GRE.</span><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quo=
t;,sans-serif;color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">I=
n section 13 IANA considerations, several overlay tunnel types are requeste=
d as follows:</span><span style=3D"font-size:10.0pt;font-family:&quot;Tahom=
a&quot;,sans-serif;color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">8=
&nbsp;&nbsp;&nbsp; VXLAN Encapsulation<br>
9&nbsp;&nbsp;&nbsp; NVGRE Encapsulation<br>
10&nbsp;&nbsp; MPLS Encapsulation&nbsp;&nbsp; (?)<br>
11&nbsp;&nbsp; MPLS in GRE Encapsulation<br>
12&nbsp;&nbsp; VXLAN GPE Encapsulation</span><span style=3D"font-size:10.0p=
t;font-family:&quot;Tahoma&quot;,sans-serif;color:black"><o:p></o:p></span>=
</p>
<p><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-seri=
f;color:black">&nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">I=
MO, 8,9,11 and 12 are all overlay encapsulations, 10 is an exception. Would=
 you like to explain what's the purpose of tunnel type 10?</span><span styl=
e=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black=
"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-seri=
f;color:black">&nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
hanks,</span><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;=
,sans-serif;color:black"><o:p></o:p></span></p>
<p style=3D"margin-bottom:12.0pt"><span style=3D"font-family:&quot;Calibri&=
quot;,sans-serif;color:black">weiguo</span><span style=3D"font-size:10.0pt;=
font-family:&quot;Tahoma&quot;,sans-serif;color:black"><o:p></o:p></span></=
p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

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From: Tapraj Singh <tsingh@juniper.net>
To: Sami Boutros <boutros.sami@gmail.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] Seeking Feedback on evpn-auto-provisoning
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Date: Wed, 11 Nov 2015 18:27:58 +0000
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Subject: Re: [bess] Seeking Feedback on evpn-auto-provisoning
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--_000_D268C27F2FB1Etsinghjunipernet_
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

Hi Sami,
  I have gone through the draft. It looks good to me. I have few comments t=
hat we should incorporate in the next version of the draft.

  1.  Currently in the draft we have First Sign of life(FSOL) that is detec=
ted from access side only. In future we can have First sign of Life that mi=
ght come from core side as well. Below I am putting different FSOL

 A) Access side L2 First Sign of Life (FSOL)

  1. Unclassified Mac

     1.1 IPoE

     1.2 PPPoE

     1.3 Mac Session

  2. Unclassified Vlan

  3. Control Protocols (i.e. ELMI, MVRP, DHCP)

B) First Sign Life that is detected from Core Side

  1.  This can be detected whenever the IM route is detected for a given EV=
I and VLAN in BGP IM Route for a given EVI.

   2. Currently in the draft we are putting that there is a default bridge =
domain which take of sending FSOL to Controller and based on the identifica=
tion(Router, port, vlan, mac etc) received in the FSOL corresponding servic=
e profile is pushed to the EVPN enable switch or router.  Here I would like=
 to suggest that we should put a concept of L2 Context that is configured o=
n port and Based on the L2 Context policies,  If first sign of LIFE packet =
is classified into L2 context then router or switch will send the FSOL to c=
ontroller for downloading the service profile to router or switches from Co=
ntroller.
       Example:
    Interface ge-1/0/0
Logical-port l2-context
l2-context type {mac, vlan, pppoe, ipoe, elmi, mvrp etc)
Encapsulation dot1q <vlan with other combinations>  <------configured if l2=
 context type vlan>
Service-policies  -----> This is need for check if service template is conf=
igured on the box itself and need to be either downloaded from controller.
3.  We should provide the template for service definition for provisioning =
service end to end based on the First sign of life packet.
 <nasport>:<mac-address> {
                  Customer ABC:
                 matching  criteria

        Re-Write

        Forwarding Service "EVPN-EVI-100"

                 Qos Profile "BRONZE"
                 CFM: MIPS/MEPs
 }
     Will work with you and will send information offline so that we can ma=
ke this draft complete for handling auto-provisioning of EVPN enabled servi=
ces for different type of FSOL and provision the service end-to-end.

Thanks
Tapraj

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of Sami Boutros <boutros.sami@gmail.com<mailto:boutros.sami@gmail.com>>
Date: Wednesday, October 7, 2015 at 1:10 PM
To: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: [bess] Seeking Feedback on evpn-auto-provisoning

Hi,

The draft propose an EVPN route based on the FSOL packets to be sent to a c=
ontroller in a data center network, to trigger a push of the related L2/L3 =
service configuration to be provisioned on the PE/NVE and on the switch por=
ts.

https://tools.ietf.org/html/draft-boutros-bess-evpn-auto-provisoning-00

Thanks,

Sami

--_000_D268C27F2FB1Etsinghjunipernet_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
<meta name=3D"ProgId" content=3D"PowerPoint.Slide">
<meta name=3D"Generator" content=3D"Microsoft PowerPoint 14">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space;">
<div style=3D"color: rgb(0, 0, 0); font-size: 16px; font-family: Calibri, s=
ans-serif;">
Hi Sami,</div>
<div style=3D"color: rgb(0, 0, 0); font-size: 16px; font-family: Calibri, s=
ans-serif;">
&nbsp; I have gone through the draft. It looks good to me. I have few comme=
nts that we should incorporate in the next version of the draft.</div>
<ol style=3D"color: rgb(0, 0, 0); font-size: 16px; font-family: Calibri, sa=
ns-serif;">
<li>Currently in the draft we have First Sign of life(FSOL) that is detecte=
d from access side only. In future we can have First sign of Life that migh=
t come from core side as well. Below I am putting different FSOL</li></ol>
<div><!--StartFragment-->
<div style=3D"color: rgb(0, 0, 0);">
<blockquote style=3D"margin:0 0 0 40px; border:none; padding:0px;">
<p style=3D"margin-top: 8pt; margin-bottom: 4pt; margin-left: 0.5in; text-i=
ndent: -0.5in; direction: ltr; unicode-bidi: embed; vertical-align: baselin=
e;">
<span style=3D"color: rgb(51, 51, 51);">&nbsp;A) Access side L2 First Sign =
of Life (FSOL)</span></p>
</blockquote>
</div>
<blockquote style=3D"color: rgb(0, 0, 0); margin: 0px 0px 0px 40px; border:=
 none; padding: 0px;">
<blockquote style=3D"margin: 0px 0px 0px 40px; border: none; padding: 0px;"=
>
<p style=3D"margin-top: 8pt; margin-bottom: 4pt; margin-left: 0.5in; text-i=
ndent: -0.5in; direction: ltr; unicode-bidi: embed; vertical-align: baselin=
e;">
<span style=3D"color: rgb(51, 51, 51);">&nbsp; 1. Unclassified Mac</span></=
p>
<p style=3D"margin-top: 8pt; margin-bottom: 4pt; margin-left: 0.5in; text-i=
ndent: -0.5in; direction: ltr; unicode-bidi: embed; vertical-align: baselin=
e;">
<span style=3D"color: rgb(51, 51, 51);">&nbsp;&nbsp;&nbsp;&nbsp; 1.1 </span=
><span style=3D"color: rgb(51, 51, 51);">IPoE</span></p>
<p style=3D"margin-top: 8pt; margin-bottom: 4pt; margin-left: 0.5in; text-i=
ndent: -0.5in; direction: ltr; unicode-bidi: embed; vertical-align: baselin=
e;">
<span style=3D"color: rgb(51, 51, 51);">&nbsp;&nbsp;&nbsp;&nbsp; 1.2 </span=
><span style=3D"color: rgb(51, 51, 51);">PPPoE</span></p>
<p style=3D"margin-top: 8pt; margin-bottom: 4pt; margin-left: 0.5in; text-i=
ndent: -0.5in; direction: ltr; unicode-bidi: embed; vertical-align: baselin=
e;">
<span style=3D"color: rgb(51, 51, 51);">&nbsp;&nbsp;&nbsp;&nbsp; 1.3 Mac Se=
ssion</span></p>
<p style=3D"margin-top: 8pt; margin-bottom: 4pt; margin-left: 0.5in; text-i=
ndent: -0.5in; direction: ltr; unicode-bidi: embed; vertical-align: baselin=
e;">
<span style=3D"color: rgb(51, 51, 51);">&nbsp; 2. Unclassified </span><span=
 style=3D"color: rgb(51, 51, 51);">Vlan</span></p>
<p style=3D"margin-top: 8pt; margin-bottom: 4pt; margin-left: 0.5in; text-i=
ndent: -0.5in; direction: ltr; unicode-bidi: embed; vertical-align: baselin=
e;">
<span style=3D"color: rgb(51, 51, 51);">&nbsp; 3. Control Protocols (i.e. E=
LMI, MVRP, DHCP)</span></p>
</blockquote>
</blockquote>
<div>
<blockquote style=3D"color: rgb(0, 0, 0); margin: 0px 0px 0px 40px; border:=
 none; padding: 0px;">
<p style=3D"margin-top: 8pt; margin-bottom: 4pt; margin-left: 0.5in; text-i=
ndent: -0.5in; direction: ltr; unicode-bidi: embed; vertical-align: baselin=
e;">
<span style=3D"color: rgb(51, 51, 51); text-indent: -0.12in;">B) First Sign=
 Life that is detected from Core Side</span></p>
<blockquote style=3D"margin:0 0 0 40px; border:none; padding:0px;">
<ol>
<li><span style=3D"color: rgb(51, 51, 51); text-indent: -0.12in;">This can =
be detected whenever the IM route is detected for a given EVI and VLAN in B=
GP IM Route for a given EVI.</span></li></ol>
<div><span style=3D"color: rgb(51, 51, 51); font-family: Calibri; font-size=
: 16px; font-style: normal; font-weight: normal; text-decoration: none;"><b=
r>
</span></div>
</blockquote>
</blockquote>
<div><font color=3D"#333333">&nbsp; &nbsp;2. Currently in the draft we are =
putting that there is a default bridge domain which take of sending FSOL to=
 Controller and based on the identification(Router, port, vlan, mac etc) re=
ceived in the FSOL corresponding service profile
 is pushed to the EVPN enable switch or router. &nbsp;Here&nbsp;I would lik=
e to suggest that we should put a concept of L2 Context that is configured =
on port and Based on the L2 Context policies, &nbsp;If first sign of LIFE p=
acket is classified into L2 context then router
 or switch will send the FSOL to controller for downloading the service pro=
file to router or switches from Controller.</font></div>
</div>
<div><font color=3D"#333333">&nbsp; &nbsp; &nbsp; &nbsp;Example:</font></di=
v>
<div><font color=3D"#333333"><span class=3D"Apple-tab-span" style=3D"white-=
space:pre"></span>&nbsp; &nbsp;&nbsp;Interface ge-1/0/0</font></div>
<div><font color=3D"#333333"><span class=3D"Apple-tab-span" style=3D"white-=
space:pre"></span>Logical-port l2-context</font></div>
<div><font color=3D"#333333"><span class=3D"Apple-tab-span" style=3D"white-=
space:pre"></span>l2-context type {mac, vlan, pppoe, ipoe, elmi, mvrp etc)<=
/font></div>
<div><font color=3D"#333333"><span class=3D"Apple-tab-span" style=3D"white-=
space:pre"></span>Encapsulation dot1q &lt;vlan with other combinations&gt; =
&nbsp;&lt;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;configured if l2 contex=
t type vlan&gt;</font></div>
</div>
<div><font color=3D"#333333"><span class=3D"Apple-tab-span" style=3D"white-=
space:pre"></span>Service-policies&nbsp;<span class=3D"Apple-tab-span" styl=
e=3D"white-space:pre">
</span>&#8212;&#8212;&#8212;&#8212;&#8212;&gt;&nbsp;This is need for check =
if service template is configured on the box itself and need to be either d=
ownloaded from controller.</font></div>
<div><font color=3D"#333333"><span class=3D"Apple-tab-span" style=3D"white-=
space:pre"></span></font></div>
<div>3. &nbsp;We should provide the template for service definition for pro=
visioning service end to end based on the First sign of life packet.</div>
<div><!--StartFragment-->
<blockquote style=3D"margin:0 0 0 40px; border:none; padding:0px;">
<blockquote style=3D"margin:0 0 0 40px; border:none; padding:0px;">
<div style=3D"margin-top: 8pt; margin-bottom: 4pt; margin-left: 0.12in; tex=
t-indent: -0.12in; direction: ltr; unicode-bidi: embed; vertical-align: bas=
eline;">
<span style=3D"font-size:24.0pt"><span style=3D"mso-special-format:bullet;c=
olor:#333333;
mso-color-index:1;font-family:Arial;font-size:25%">&nbsp;</span></span>&lt;=
nasport&gt;:&lt;mac-address&gt; {</div>
<div style=3D"margin-top: 8pt; margin-bottom: 4pt; margin-left: 0.12in; tex=
t-indent: -0.12in; direction: ltr; unicode-bidi: embed; vertical-align: bas=
eline;">
&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;Cu=
stomer ABC:&nbsp; </div>
<div style=3D"margin-top: 8pt; margin-bottom: 4pt; margin-left: 0.12in; tex=
t-indent: -0.12in; direction: ltr; unicode-bidi: embed; vertical-align: bas=
eline;">
&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;matching=
&nbsp; criteria</div>
<p style=3D"margin-top: 0pt; margin-bottom: 5pt; margin-left: 0.62in; text-=
indent: -0.25in; direction: ltr; unicode-bidi: embed; vertical-align: basel=
ine;">
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;Re-Write </p>
<p style=3D"margin-top: 0pt; margin-bottom: 5pt; margin-left: 0.62in; text-=
indent: -0.25in; direction: ltr; unicode-bidi: embed; vertical-align: basel=
ine;">
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;Forwarding Service &#8220;EVPN-EVI-100&#82=
21;</p>
<div style=3D"margin-top: 8pt; margin-bottom: 4pt; margin-left: 0.12in; tex=
t-indent: -0.12in; direction: ltr; unicode-bidi: embed; vertical-align: bas=
eline;">
&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;Qos Prof=
ile &#8220;BRONZE&#8221;</div>
<div style=3D"margin-top: 8pt; margin-bottom: 4pt; margin-left: 0.12in; tex=
t-indent: -0.12in; direction: ltr; unicode-bidi: embed; vertical-align: bas=
eline;">
&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;CFM: MIP=
S/MEPs</div>
<div style=3D"margin-top: 8pt; margin-bottom: 4pt; margin-left: 0.12in; tex=
t-indent: -0.12in; direction: ltr; unicode-bidi: embed; vertical-align: bas=
eline;">
&nbsp;}</div>
</blockquote>
</blockquote>
<!--EndFragment--></div>
<div>&nbsp; &nbsp; &nbsp;Will work with you and will send information offli=
ne so that we can make this draft complete for handling auto-provisioning o=
f EVPN enabled services for different type of FSOL and provision the servic=
e end-to-end.</div>
<div><br>
</div>
<div>Thanks</div>
<div>Tapraj</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"color: rgb(0, 0, 0); font-size: =
16px; font-family: Calibri, sans-serif;">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>BESS &lt;<a href=3D"mailto:be=
ss-bounces@ietf.org">bess-bounces@ietf.org</a>&gt; on behalf of Sami Boutro=
s &lt;<a href=3D"mailto:boutros.sami@gmail.com">boutros.sami@gmail.com</a>&=
gt;<br>
<span style=3D"font-weight:bold">Date: </span>Wednesday, October 7, 2015 at=
 1:10 PM<br>
<span style=3D"font-weight:bold">To: </span>&quot;<a href=3D"mailto:bess@ie=
tf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org">bess@i=
etf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>[bess] Seeking Feedback on=
 evpn-auto-provisoning<br>
</div>
<div><br>
</div>
<div>
<div>
<div dir=3D"ltr">
<div>Hi,<br>
<br>
</div>
The draft propose an EVPN route based on the FSOL packets to be sent to a c=
ontroller in a data center network, to trigger a push of the related L2/L3 =
service configuration to be provisioned on the PE/NVE and on the switch por=
ts.
<div><br>
<a href=3D"https://tools.ietf.org/html/draft-boutros-bess-evpn-auto-proviso=
ning-00">https://tools.ietf.org/html/draft-boutros-bess-evpn-auto-provisoni=
ng-00</a><br>
<br>
</div>
<div>Thanks,<br>
<br>
</div>
<div>Sami<br>
</div>
</div>
</div>
</div>
</span>
</body>
</html>

--_000_D268C27F2FB1Etsinghjunipernet_--


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From: Haoweiguo <haoweiguo@huawei.com>
To: John E Drake <jdrake@juniper.net>, "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>, "sajassi@cisco.com" <sajassi@cisco.com>
Thread-Topic: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
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Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
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John,

It's clear, great thanks. Yes, it's needed in order to distinguish between =
an advertising node that only support non-MPLS encapsulations and one that =
supports MPLS and non-MPLS encapsulations. If has no this MPLS encapsulatio=
n type, the node that supports MPLS and non-MPLS encapsulations will deemed=
 to be the node that only support non-MPLS encapsulations by remote EVPN PE=
s.

Thanks,

weiguo

________________________________

From: John E Drake [jdrake@juniper.net]
Sent: Wednesday, November 11, 2015 22:39
To: Haoweiguo; Rabadan, Jorge (Jorge); sajassi@cisco.com
Cc: bess@ietf.org
Subject: RE: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'

Weiguo,

It is needed in order to distinguish between an advertising node that only =
supports non-MPLS encapsulations and one that supports MPLS and non-MPLS en=
capsulations.  An advertising node that only supports MPLS encapsulation do=
es not need to advertise anything.

Yours Irrespectively,

John

From: Haoweiguo [mailto:haoweiguo@huawei.com]
Sent: Wednesday, November 11, 2015 1:08 AM
To: Rabadan, Jorge (Jorge); sajassi@cisco.com; John E Drake
Cc: bess@ietf.org
Subject: RE: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'


Jorge,

Understood, many thanks. Now that the default tunnel encapsulation is MPLS =
encapsulation, the tunnel type 10 seems to be unneccessary. So is the intro=
duction of tunnel type 10 just for further removing ambiguity? If i don't u=
se the tunnel type 10 in MPLS based EVPN implementation(RFC 7432), it will =
also never incur any issue. Am i right?



Thanks,

weiguo

________________________________
From: BESS [bess-bounces@ietf.org] on behalf of Rabadan, Jorge (Jorge) [jor=
ge.rabadan@alcatel-lucent.com]
Sent: Wednesday, November 11, 2015 11:47
To: Haoweiguo; sajassi@cisco.com<mailto:sajassi@cisco.com>; jdrake@juniper.=
net<mailto:jdrake@juniper.net>
Cc: bess@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
Weiguo,

Well, if an RFC7432 implementation does not use the RFC5512 ext community, =
the following sentence in the evan-overlay draft should help interoperabili=
ty. I personally don=92t see any issues.


If the BGP Encapsulation extended community is not present, then the

   default MPLS encapsulation or a statically configured encapsulation

   is assumed.

Thanks.
Jorge

From: Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>
Date: Tuesday, November 10, 2015 at 7:03 PM
To: Jorge Rabadan <jorge.rabadan@alcatel-lucent.com<mailto:jorge.rabadan@al=
catel-lucent.com>>, "sajassi@cisco.com<mailto:sajassi@cisco.com>" <sajassi@=
cisco.com<mailto:sajassi@cisco.com>>, "jdrake@juniper.net<mailto:jdrake@jun=
iper.net>" <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: RE: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'


Jorge,

Thanks for your explanations. However, i still can't understand, i'm sorry.

RFC 5512 only defines IP tunnel type and encapsulation attribute, like L2TP=
v3,GRE and IP in IP.  For RFC 5512, MPLS tunnel doesn't need to be defined =
specifically, it is default case. In RFC 7432, the tunnel type 10 also hasn=
't been defined. Later, when the EVPN for overlay network solution was prop=
osed, the tunnel type 10 was introduced to differentiate MPLS tunnel and VX=
LAN/NVGRE/MPLS Over GRE tunnel, because same route type 1,2,3,4 and 5 are u=
sed in both RFC 7432 and the draft 'draft-ietf-bess-evpn-overlay-02'. We ne=
ed the tunnel type to clearly notify peer EVPN PE which tunnel(including MP=
LS tunnel type) should be used.  So it introduced updates on RFC 7432 and w=
ill incur some interoperbility issue for RFC 7432. Am i right?

Thanks,

weiguo



________________________________
From: BESS [bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>] on behalf =
of Rabadan, Jorge (Jorge) [jorge.rabadan@alcatel-lucent.com<mailto:jorge.ra=
badan@alcatel-lucent.com>]
Sent: Wednesday, November 11, 2015 0:01
To: Haoweiguo; sajassi@cisco.com<mailto:sajassi@cisco.com>; jdrake@juniper.=
net<mailto:jdrake@juniper.net>
Cc: bess@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
Weiguo,

There are already implementations using value 10 in the RFC5512 BGP encap e=
xt community.
That is the value you would have in RFC7432 compliant networks where you ca=
n also have overlay tunnels. Value 10 would indicate to the ingress PE that=
 the route needs an MPLS tunnel to be resolved.

Thx
Jorge

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>
Date: Tuesday, November 10, 2015 at 1:05 AM
To: "sajassi@cisco.com<mailto:sajassi@cisco.com>" <sajassi@cisco.com<mailto=
:sajassi@cisco.com>>, "jdrake@juniper.net<mailto:jdrake@juniper.net>" <jdra=
ke@juniper.net<mailto:jdrake@juniper.net>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'


Hi Ali & John,

The draft of 'draft-ietf-bess-evpn-overlay-02' describes how EVPN can be us=
ed for Overlay network, the overlay network includes VXLAN, NVGRE and MPLS =
Over GRE.

In section 13 IANA considerations, several overlay tunnel types are request=
ed as follows:

8    VXLAN Encapsulation
9    NVGRE Encapsulation
10   MPLS Encapsulation   (?)
11   MPLS in GRE Encapsulation
12   VXLAN GPE Encapsulation



IMO, 8,9,11 and 12 are all overlay encapsulations, 10 is an exception. Woul=
d you like to explain what's the purpose of tunnel type 10?



Thanks,

weiguo

--_000_DD5FC8DE455C3348B94340C0AB5517334F8D6DF8nkgeml501mbschi_
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<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple" fPStyle=3D"1" ocsi=3D"0=
">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">
<p><font size=3D"3" face=3D"Calibri">John,</font></p>
<p><font face=3D"Calibri"><font size=3D"3">It's clear, great thanks. Yes, i=
t's needed in order to distinguish between an advertising node that only su=
pport non-MPLS encapsulations and one that supports MPLS and non-MPLS encap=
sulations. If has no this MPLS encapsulation
 type, the node that supports MPLS and non-MPLS encapsulations will deemed =
to be the node that only support non-MPLS encapsulations by remote EVPN PEs=
.</font></font></p>
<p><font size=3D"3" face=3D"Calibri">Thanks,</font></p>
<p><font size=3D"3" face=3D"Calibri">weiguo</font></p>
<p></p>
<hr tabindex=3D"-1">
<p></p>
<div style=3D"FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px=
">
<div style=3D"DIRECTION: ltr" id=3D"divRpF391323"><font size=3D"2" face=3D"=
Tahoma"><b>From:</b> John E Drake [jdrake@juniper.net]<br>
<b>Sent:</b> Wednesday, November 11, 2015 22:39<br>
<b>To:</b> Haoweiguo; Rabadan, Jorge (Jorge); sajassi@cisco.com<br>
<b>Cc:</b> bess@ietf.org<br>
<b>Subject:</b> RE: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'<br>
</font><br>
</div>
<div></div>
<div>
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt">Weiguo,</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt">It is needed in order to distinguish between=
 an advertising node that only supports non-MPLS encapsulations and one tha=
t supports MPLS and non-MPLS encapsulations.&nbsp;
 An advertising node that only supports MPLS encapsulation does not need to=
 advertise anything.</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt"></span>&nbsp;</p>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt">Yours Irrespectively,</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt">John</span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt"></span>&nbsp;</p>
<div style=3D"BORDER-BOTTOM: medium none; BORDER-LEFT: blue 1.5pt solid; PA=
DDING-BOTTOM: 0in; PADDING-LEFT: 4pt; PADDING-RIGHT: 0in; BORDER-TOP: mediu=
m none; BORDER-RIGHT: medium none; PADDING-TOP: 0in">
<div>
<div style=3D"BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING=
-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #e1e1e1 1p=
t solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<p class=3D"MsoNormal"><b><span style=3D"FONT-FAMILY: 'Calibri',sans-serif;=
 FONT-SIZE: 11pt">From:</span></b><span style=3D"FONT-FAMILY: 'Calibri',san=
s-serif; FONT-SIZE: 11pt"> Haoweiguo [mailto:haoweiguo@huawei.com]
<br>
<b>Sent:</b> Wednesday, November 11, 2015 1:08 AM<br>
<b>To:</b> Rabadan, Jorge (Jorge); sajassi@cisco.com; John E Drake<br>
<b>Cc:</b> bess@ietf.org<br>
<b>Subject:</b> RE: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<div>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">Jorge,</=
span><span style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-SI=
ZE: 10pt"></span></p>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">Understo=
od, many thanks. Now that the default tunnel encapsulation is MPLS encapsul=
ation, the tunnel type 10 seems to be unneccessary. So is the introduction =
of tunnel type 10 just for further
 removing ambiguity? If i don't use the tunnel type 10 in MPLS based EVPN i=
mplementation(RFC 7432), it will also never incur any issue. Am i right?</s=
pan><span style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-SIZ=
E: 10pt"></span></p>
<p><span style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-SIZE=
: 10pt"></span>&nbsp;</p>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">Thanks,<=
/span><span style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-S=
IZE: 10pt"></span></p>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">weiguo</=
span><span style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-SI=
ZE: 10pt"></span></p>
<div>
<div style=3D"TEXT-ALIGN: center" class=3D"MsoNormal" align=3D"center"><spa=
n style=3D"COLOR: black">
<hr align=3D"center" size=3D"2" width=3D"100%">
</span></div>
<div id=3D"divRpF728179">
<p style=3D"MARGIN-BOTTOM: 12pt" class=3D"MsoNormal"><b><span style=3D"FONT=
-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-SIZE: 10pt">From:</span></=
b><span style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-SIZE:=
 10pt"> BESS [bess-bounces@ietf.org] on
 behalf of Rabadan, Jorge (Jorge) [jorge.rabadan@alcatel-lucent.com]<br>
<b>Sent:</b> Wednesday, November 11, 2015 11:47<br>
<b>To:</b> Haoweiguo; <a href=3D"mailto:sajassi@cisco.com" target=3D"_blank=
">sajassi@cisco.com</a>;
<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@juniper.net<=
/a><br>
<b>Cc:</b> <a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org=
</a><br>
<b>Subject:</b> Re: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'</span><span style=3D"COLOR: black"></span></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black">Weiguo,</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black">Well, if an RFC7432 imp=
lementation does not use the RFC5512 ext community, the following sentence =
in the evan-overlay draft should help interoperability. I personally don=92=
t see any issues.</span></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black"></span>&nbsp;</p>
</div>
<div>
<pre style=3D"PAGE-BREAK-BEFORE: always"><span style=3D"COLOR: black">If th=
e BGP Encapsulation extended community is not present, then the</span></pre=
>
<pre style=3D"PAGE-BREAK-BEFORE: always"><span style=3D"COLOR: black">&nbsp=
;&nbsp; default MPLS encapsulation or a statically configured encapsulation=
</span></pre>
<pre style=3D"PAGE-BREAK-BEFORE: always"><span style=3D"COLOR: black">&nbsp=
;&nbsp; is assumed.</span></pre>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black">Thanks.</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black">Jorge</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black"></span>&nbsp;</p>
</div>
<div style=3D"BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING=
-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1p=
t solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<p class=3D"MsoNormal"><b><span style=3D"FONT-FAMILY: 'Calibri',sans-serif;=
 COLOR: black">From:
</span></b><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">=
Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com" target=3D"_blank">hao=
weiguo@huawei.com</a>&gt;<br>
<b>Date: </b>Tuesday, November 10, 2015 at 7:03 PM<br>
<b>To: </b>Jorge Rabadan &lt;<a href=3D"mailto:jorge.rabadan@alcatel-lucent=
.com" target=3D"_blank">jorge.rabadan@alcatel-lucent.com</a>&gt;, &quot;<a =
href=3D"mailto:sajassi@cisco.com" target=3D"_blank">sajassi@cisco.com</a>&q=
uot; &lt;<a href=3D"mailto:sajassi@cisco.com" target=3D"_blank">sajassi@cis=
co.com</a>&gt;,
 &quot;<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@junip=
er.net</a>&quot; &lt;<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank=
">jdrake@juniper.net</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>RE: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black"></span>&nbsp;</p>
</div>
<blockquote style=3D"BORDER-BOTTOM: medium none; BORDER-LEFT: #b5c4df 4.5pt=
 solid; PADDING-BOTTOM: 0in; PADDING-LEFT: 4pt; PADDING-RIGHT: 0in; MARGIN-=
LEFT: 3.75pt; BORDER-TOP: medium none; MARGIN-RIGHT: 0in; BORDER-RIGHT: med=
ium none; PADDING-TOP: 0in" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">Jorge,</=
span></p>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">Thanks f=
or your explanations. However, i still can't understand, i'm sorry.</span><=
/p>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">RFC 5512=
 only defines IP tunnel type and encapsulation attribute, like L2TPv3,GRE a=
nd IP in IP.&nbsp; For RFC 5512, MPLS tunnel doesn't need to be defined spe=
cifically, it is default case. In RFC 7432,
 the tunnel type 10 also hasn't been defined. Later, when the EVPN for over=
lay network solution was proposed, the tunnel type 10 was introduced to dif=
ferentiate MPLS tunnel and VXLAN/NVGRE/MPLS Over GRE tunnel, because&nbsp;s=
ame route type 1,2,3,4 and 5 are used
 in both RFC 7432 and the draft 'draft-ietf-bess-evpn-overlay-02'. We need =
the tunnel type to clearly notify peer EVPN PE which tunnel(including MPLS =
tunnel type) should be used.&nbsp; So it introduced updates on RFC 7432 and=
 will incur some interoperbility issue
 for RFC 7432. Am i right?</span></p>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">Thanks,<=
/span></p>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">weiguo</=
span></p>
<p><span style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-SIZE=
: 10pt"></span>&nbsp;</p>
<div style=3D"TEXT-ALIGN: center" class=3D"MsoNormal" align=3D"center"><spa=
n style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-SIZE: 10pt"=
>
<hr align=3D"center" size=3D"2" width=3D"100%">
</span></div>
<div>
<div id=3D"divRpF357510">
<p style=3D"MARGIN-BOTTOM: 12pt" class=3D"MsoNormal"><b><span style=3D"FONT=
-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-SIZE: 10pt">From:</span></=
b><span style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-SIZE:=
 10pt"> BESS [<a href=3D"mailto:bess-bounces@ietf.org" target=3D"_blank">be=
ss-bounces@ietf.org</a>]
 on behalf of Rabadan, Jorge (Jorge) [<a href=3D"mailto:jorge.rabadan@alcat=
el-lucent.com" target=3D"_blank">jorge.rabadan@alcatel-lucent.com</a>]<br>
<b>Sent:</b> Wednesday, November 11, 2015 0:01<br>
<b>To:</b> Haoweiguo; <a href=3D"mailto:sajassi@cisco.com" target=3D"_blank=
">sajassi@cisco.com</a>;
<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@juniper.net<=
/a><br>
<b>Cc:</b> <a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org=
</a><br>
<b>Subject:</b> Re: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'</span><span style=3D"COLOR: black"></span></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black">Weiguo,&nbsp;</span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black">There are already imple=
mentations using value 10 in the RFC5512 BGP encap ext community.</span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black">That is the value you w=
ould have in RFC7432 compliant networks where you can also have overlay tun=
nels. Value 10 would indicate to the ingress PE that the route needs an MPL=
S tunnel to be resolved.</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black">Thx</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black">Jorge</span></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black"></span>&nbsp;</p>
</div>
<div style=3D"BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING=
-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1p=
t solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<p class=3D"MsoNormal"><b><span style=3D"FONT-FAMILY: 'Calibri',sans-serif;=
 COLOR: black">From:
</span></b><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">=
BESS &lt;<a href=3D"mailto:bess-bounces@ietf.org" target=3D"_blank">bess-bo=
unces@ietf.org</a>&gt; on behalf of Haoweiguo &lt;<a href=3D"mailto:haoweig=
uo@huawei.com" target=3D"_blank">haoweiguo@huawei.com</a>&gt;<br>
<b>Date: </b>Tuesday, November 10, 2015 at 1:05 AM<br>
<b>To: </b>&quot;<a href=3D"mailto:sajassi@cisco.com" target=3D"_blank">saj=
assi@cisco.com</a>&quot; &lt;<a href=3D"mailto:sajassi@cisco.com" target=3D=
"_blank">sajassi@cisco.com</a>&gt;, &quot;<a href=3D"mailto:jdrake@juniper.=
net" target=3D"_blank">jdrake@juniper.net</a>&quot; &lt;<a href=3D"mailto:j=
drake@juniper.net" target=3D"_blank">jdrake@juniper.net</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>[bess] One question about 'draft-ietf-bess-evpn-overlay-02'=
</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"COLOR: black"></span>&nbsp;</p>
</div>
<blockquote style=3D"BORDER-BOTTOM: medium none; BORDER-LEFT: #b5c4df 4.5pt=
 solid; PADDING-BOTTOM: 0in; PADDING-LEFT: 4pt; PADDING-RIGHT: 0in; MARGIN-=
LEFT: 3.75pt; BORDER-TOP: medium none; MARGIN-RIGHT: 0in; BORDER-RIGHT: med=
ium none; PADDING-TOP: 0in" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">Hi Ali &=
amp; John,</span><span style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: bl=
ack; FONT-SIZE: 10pt"></span></p>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">The draf=
t of 'draft-ietf-bess-evpn-overlay-02' describes how EVPN can be used for O=
verlay network, the overlay network includes VXLAN, NVGRE and MPLS Over GRE=
.</span><span style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT=
-SIZE: 10pt"></span></p>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">In secti=
on 13 IANA considerations, several overlay tunnel types are requested as fo=
llows:</span><span style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: black;=
 FONT-SIZE: 10pt"></span></p>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">8&nbsp;&=
nbsp;&nbsp; VXLAN Encapsulation<br>
9&nbsp;&nbsp;&nbsp; NVGRE Encapsulation<br>
10&nbsp;&nbsp; MPLS Encapsulation&nbsp;&nbsp; (?)<br>
11&nbsp;&nbsp; MPLS in GRE Encapsulation<br>
12&nbsp;&nbsp; VXLAN GPE Encapsulation</span><span style=3D"FONT-FAMILY: 'T=
ahoma',sans-serif; COLOR: black; FONT-SIZE: 10pt"></span></p>
<p><span style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-SIZE=
: 10pt"></span>&nbsp;</p>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">IMO, 8,9=
,11 and 12 are all overlay encapsulations, 10 is an exception. Would you li=
ke to explain what's the purpose of tunnel type 10?</span><span style=3D"FO=
NT-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-SIZE: 10pt"></span></p>
<p><span style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-SIZE=
: 10pt"></span>&nbsp;</p>
<p><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">Thanks,<=
/span><span style=3D"FONT-FAMILY: 'Tahoma',sans-serif; COLOR: black; FONT-S=
IZE: 10pt"></span></p>
<p style=3D"MARGIN-BOTTOM: 12pt"><span style=3D"FONT-FAMILY: 'Calibri',sans=
-serif; COLOR: black">weiguo</span><span style=3D"FONT-FAMILY: 'Tahoma',san=
s-serif; COLOR: black; FONT-SIZE: 10pt"></span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

--_000_DD5FC8DE455C3348B94340C0AB5517334F8D6DF8nkgeml501mbschi_--


From nobody Thu Nov 12 00:39:36 2015
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Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
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HI John, Weiguo,

John E Drake :
>
> It is needed in order to distinguish between an advertising node that 
> only supports non-MPLS encapsulations and one that supports MPLS and 
> non-MPLS encapsulations.  An advertising node that only supports MPLS 
> encapsulation does not need to advertise anything.
>

By the way, I suggested this to be documented in 
draft-rosen-idr-tunnel-encaps [1].

Best,

-Thomas

[1] http://www.ietf.org/mail-archive/web/idr/current/msg14732.html


> *From:*Haoweiguo [mailto:haoweiguo@huawei.com]
> *Sent:* Wednesday, November 11, 2015 1:08 AM
> *To:* Rabadan, Jorge (Jorge); sajassi@cisco.com; John E Drake
> *Cc:* bess@ietf.org
> *Subject:* RE: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>
> Jorge,
>
> Understood, many thanks. Now that the default tunnel encapsulation is 
> MPLS encapsulation, the tunnel type 10 seems to be unneccessary. So is 
> the introduction of tunnel type 10 just for further removing 
> ambiguity? If i don't use the tunnel type 10 in MPLS based EVPN 
> implementation(RFC 7432), it will also never incur any issue. Am i right?
>
> Thanks,
>
> weiguo
>
> ------------------------------------------------------------------------
>
> *From:*BESS [bess-bounces@ietf.org] on behalf of Rabadan, Jorge 
> (Jorge) [jorge.rabadan@alcatel-lucent.com]
> *Sent:* Wednesday, November 11, 2015 11:47
> *To:* Haoweiguo; sajassi@cisco.com <mailto:sajassi@cisco.com>; 
> jdrake@juniper.net <mailto:jdrake@juniper.net>
> *Cc:* bess@ietf.org <mailto:bess@ietf.org>
> *Subject:* Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>
> Weiguo,
>
> Well, if an RFC7432 implementation does not use the RFC5512 ext 
> community, the following sentence in the evan-overlay draft should 
> help interoperability. I personally don’t see any issues.
>
> If the BGP Encapsulation extended community is not present, then the
>    default MPLS encapsulation or a statically configured encapsulation
>    is assumed.
>
> Thanks.
>
> Jorge
>
> *From: *Haoweiguo <haoweiguo@huawei.com <mailto:haoweiguo@huawei.com>>
> *Date: *Tuesday, November 10, 2015 at 7:03 PM
> *To: *Jorge Rabadan <jorge.rabadan@alcatel-lucent.com 
> <mailto:jorge.rabadan@alcatel-lucent.com>>, "sajassi@cisco.com 
> <mailto:sajassi@cisco.com>" <sajassi@cisco.com 
> <mailto:sajassi@cisco.com>>, "jdrake@juniper.net 
> <mailto:jdrake@juniper.net>" <jdrake@juniper.net 
> <mailto:jdrake@juniper.net>>
> *Cc: *"bess@ietf.org <mailto:bess@ietf.org>" <bess@ietf.org 
> <mailto:bess@ietf.org>>
> *Subject: *RE: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>
>     Jorge,
>
>     Thanks for your explanations. However, i still can't understand,
>     i'm sorry.
>
>     RFC 5512 only defines IP tunnel type and encapsulation attribute,
>     like L2TPv3,GRE and IP in IP.  For RFC 5512, MPLS tunnel doesn't
>     need to be defined specifically, it is default case. In RFC 7432,
>     the tunnel type 10 also hasn't been defined. Later, when the EVPN
>     for overlay network solution was proposed, the tunnel type 10 was
>     introduced to differentiate MPLS tunnel and VXLAN/NVGRE/MPLS Over
>     GRE tunnel, because same route type 1,2,3,4 and 5 are used in both
>     RFC 7432 and the draft 'draft-ietf-bess-evpn-overlay-02'. We need
>     the tunnel type to clearly notify peer EVPN PE which
>     tunnel(including MPLS tunnel type) should be used.  So it
>     introduced updates on RFC 7432 and will incur some interoperbility
>     issue for RFC 7432. Am i right?
>
>     Thanks,
>
>     weiguo
>
>     ------------------------------------------------------------------------
>
>     *From:*BESS [bess-bounces@ietf.org <mailto:bess-bounces@ietf.org>]
>     on behalf of Rabadan, Jorge (Jorge)
>     [jorge.rabadan@alcatel-lucent.com
>     <mailto:jorge.rabadan@alcatel-lucent.com>]
>     *Sent:* Wednesday, November 11, 2015 0:01
>     *To:* Haoweiguo; sajassi@cisco.com <mailto:sajassi@cisco.com>;
>     jdrake@juniper.net <mailto:jdrake@juniper.net>
>     *Cc:* bess@ietf.org <mailto:bess@ietf.org>
>     *Subject:* Re: [bess] One question about
>     'draft-ietf-bess-evpn-overlay-02'
>
>     Weiguo,
>
>     There are already implementations using value 10 in the RFC5512
>     BGP encap ext community.
>
>     That is the value you would have in RFC7432 compliant networks
>     where you can also have overlay tunnels. Value 10 would indicate
>     to the ingress PE that the route needs an MPLS tunnel to be resolved.
>
>     Thx
>
>     Jorge
>
>     *From: *BESS <bess-bounces@ietf.org
>     <mailto:bess-bounces@ietf.org>> on behalf of Haoweiguo
>     <haoweiguo@huawei.com <mailto:haoweiguo@huawei.com>>
>     *Date: *Tuesday, November 10, 2015 at 1:05 AM
>     *To: *"sajassi@cisco.com <mailto:sajassi@cisco.com>"
>     <sajassi@cisco.com <mailto:sajassi@cisco.com>>,
>     "jdrake@juniper.net <mailto:jdrake@juniper.net>"
>     <jdrake@juniper.net <mailto:jdrake@juniper.net>>
>     *Cc: *"bess@ietf.org <mailto:bess@ietf.org>" <bess@ietf.org
>     <mailto:bess@ietf.org>>
>     *Subject: *[bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>
>         Hi Ali & John,
>
>         The draft of 'draft-ietf-bess-evpn-overlay-02' describes how
>         EVPN can be used for Overlay network, the overlay network
>         includes VXLAN, NVGRE and MPLS Over GRE.
>
>         In section 13 IANA considerations, several overlay tunnel
>         types are requested as follows:
>
>         8 VXLAN Encapsulation
>         9    NVGRE Encapsulation
>         10   MPLS Encapsulation   (?)
>         11   MPLS in GRE Encapsulation
>         12   VXLAN GPE Encapsulation
>
>         IMO, 8,9,11 and 12 are all overlay encapsulations, 10 is an
>         exception. Would you like to explain what's the purpose of
>         tunnel type 10?
>
>         Thanks,
>
>         weiguo
>
>
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess


_________________________________________________________________________________________________________________________

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From nobody Thu Nov 12 00:50:28 2015
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Subject: [bess] IPR issue resulting in an *Extended* Poll for adoption: draft-hao-bess-inter-nvo3-vpn-option
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Hi working group,

IPR [1] has been disclosed on draft-hao-bess-inter-nvo3-vpn-optionc 
during the call for adoption (2015-10-26).

We regret that this disclosure came this late in the process, and we 
have to let the working group comment on this call with full awareness 
of existing IPR.

This call for adoption is thus extended to **November 26th**.

In parallel, we will work to understand whether this disclosure is late 
compared to expectations raised in RFC3979 (we haven't yet determined 
how the set of authors intersect with the set of inventors on the patent).

Best,

-Thomas

[1] https://datatracker.ietf.org/ipr/2700/



22/10/2015, Thomas Morin :
> Hello working group,
>
> This email starts a two-week poll on adopting
> draft-hao-bess-inter-nvo3-vpn-optionc-03 [1] as a working group item.
>
> Please send comments to the list and state if you support adoption or
> not (in the later case, please also state the reasons).
>
> This poll runs until **November 13th**.
> (3 weeks to account for the busy IETF week)
>
>
> *Coincidentally*, we are also polling for knowledge of any IPR that
> applies to this draft, to ensure that IPR has been disclosed in
> compliance with IETF IPR rules (see RFCs 3979, 4879, 3669
> and 5378 for more details).
>
> ==> *If* you are listed as a document author or contributor please
> respond to this email and indicate whether or not you are aware of any 
> relevant IPR.
>
> The draft will not be adopted until a response has been received from
> each author and contributor.
>
> If you are not listed as an author or contributor, then please 
> explicitly respond only if you are aware of any IPR that has not yet 
> been disclosed in conformance with IETF rules.
>
> Thank you,
>
> Martin & Thomas
> bess chairs
>
> [1] https://tools.ietf.org/html/draft-hao-bess-inter-nvo3-vpn-optionc-03
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess


_________________________________________________________________________________________________________________________

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From nobody Thu Nov 12 06:13:04 2015
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To: Haoweiguo <haoweiguo@huawei.com>, "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>, "sajassi@cisco.com" <sajassi@cisco.com>
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Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
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Weiguo,

You're welcome.

Yours Irrespectively,

John

From: Haoweiguo [mailto:haoweiguo@huawei.com]
Sent: Wednesday, November 11, 2015 8:17 PM
To: John E Drake; Rabadan, Jorge (Jorge); sajassi@cisco.com
Cc: bess@ietf.org
Subject: RE: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'


John,

It's clear, great thanks. Yes, it's needed in order to distinguish between =
an advertising node that only support non-MPLS encapsulations and one that =
supports MPLS and non-MPLS encapsulations. If has no this MPLS encapsulatio=
n type, the node that supports MPLS and non-MPLS encapsulations will deemed=
 to be the node that only support non-MPLS encapsulations by remote EVPN PE=
s.

Thanks,

weiguo

________________________________
From: John E Drake [jdrake@juniper.net]
Sent: Wednesday, November 11, 2015 22:39
To: Haoweiguo; Rabadan, Jorge (Jorge); sajassi@cisco.com<mailto:sajassi@cis=
co.com>
Cc: bess@ietf.org<mailto:bess@ietf.org>
Subject: RE: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
Weiguo,

It is needed in order to distinguish between an advertising node that only =
supports non-MPLS encapsulations and one that supports MPLS and non-MPLS en=
capsulations.  An advertising node that only supports MPLS encapsulation do=
es not need to advertise anything.

Yours Irrespectively,

John

From: Haoweiguo [mailto:haoweiguo@huawei.com]
Sent: Wednesday, November 11, 2015 1:08 AM
To: Rabadan, Jorge (Jorge); sajassi@cisco.com<mailto:sajassi@cisco.com>; Jo=
hn E Drake
Cc: bess@ietf.org<mailto:bess@ietf.org>
Subject: RE: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'


Jorge,

Understood, many thanks. Now that the default tunnel encapsulation is MPLS =
encapsulation, the tunnel type 10 seems to be unneccessary. So is the intro=
duction of tunnel type 10 just for further removing ambiguity? If i don't u=
se the tunnel type 10 in MPLS based EVPN implementation(RFC 7432), it will =
also never incur any issue. Am i right?



Thanks,

weiguo

________________________________
From: BESS [bess-bounces@ietf.org] on behalf of Rabadan, Jorge (Jorge) [jor=
ge.rabadan@alcatel-lucent.com]
Sent: Wednesday, November 11, 2015 11:47
To: Haoweiguo; sajassi@cisco.com<mailto:sajassi@cisco.com>; jdrake@juniper.=
net<mailto:jdrake@juniper.net>
Cc: bess@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
Weiguo,

Well, if an RFC7432 implementation does not use the RFC5512 ext community, =
the following sentence in the evan-overlay draft should help interoperabili=
ty. I personally don't see any issues.


If the BGP Encapsulation extended community is not present, then the

   default MPLS encapsulation or a statically configured encapsulation

   is assumed.

Thanks.
Jorge

From: Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>
Date: Tuesday, November 10, 2015 at 7:03 PM
To: Jorge Rabadan <jorge.rabadan@alcatel-lucent.com<mailto:jorge.rabadan@al=
catel-lucent.com>>, "sajassi@cisco.com<mailto:sajassi@cisco.com>" <sajassi@=
cisco.com<mailto:sajassi@cisco.com>>, "jdrake@juniper.net<mailto:jdrake@jun=
iper.net>" <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: RE: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'


Jorge,

Thanks for your explanations. However, i still can't understand, i'm sorry.

RFC 5512 only defines IP tunnel type and encapsulation attribute, like L2TP=
v3,GRE and IP in IP.  For RFC 5512, MPLS tunnel doesn't need to be defined =
specifically, it is default case. In RFC 7432, the tunnel type 10 also hasn=
't been defined. Later, when the EVPN for overlay network solution was prop=
osed, the tunnel type 10 was introduced to differentiate MPLS tunnel and VX=
LAN/NVGRE/MPLS Over GRE tunnel, because same route type 1,2,3,4 and 5 are u=
sed in both RFC 7432 and the draft 'draft-ietf-bess-evpn-overlay-02'. We ne=
ed the tunnel type to clearly notify peer EVPN PE which tunnel(including MP=
LS tunnel type) should be used.  So it introduced updates on RFC 7432 and w=
ill incur some interoperbility issue for RFC 7432. Am i right?

Thanks,

weiguo



________________________________
From: BESS [bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>] on behalf =
of Rabadan, Jorge (Jorge) [jorge.rabadan@alcatel-lucent.com<mailto:jorge.ra=
badan@alcatel-lucent.com>]
Sent: Wednesday, November 11, 2015 0:01
To: Haoweiguo; sajassi@cisco.com<mailto:sajassi@cisco.com>; jdrake@juniper.=
net<mailto:jdrake@juniper.net>
Cc: bess@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
Weiguo,

There are already implementations using value 10 in the RFC5512 BGP encap e=
xt community.
That is the value you would have in RFC7432 compliant networks where you ca=
n also have overlay tunnels. Value 10 would indicate to the ingress PE that=
 the route needs an MPLS tunnel to be resolved.

Thx
Jorge

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>
Date: Tuesday, November 10, 2015 at 1:05 AM
To: "sajassi@cisco.com<mailto:sajassi@cisco.com>" <sajassi@cisco.com<mailto=
:sajassi@cisco.com>>, "jdrake@juniper.net<mailto:jdrake@juniper.net>" <jdra=
ke@juniper.net<mailto:jdrake@juniper.net>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'


Hi Ali & John,

The draft of 'draft-ietf-bess-evpn-overlay-02' describes how EVPN can be us=
ed for Overlay network, the overlay network includes VXLAN, NVGRE and MPLS =
Over GRE.

In section 13 IANA considerations, several overlay tunnel types are request=
ed as follows:

8    VXLAN Encapsulation
9    NVGRE Encapsulation
10   MPLS Encapsulation   (?)
11   MPLS in GRE Encapsulation
12   VXLAN GPE Encapsulation



IMO, 8,9,11 and 12 are all overlay encapsulations, 10 is an exception. Woul=
d you like to explain what's the purpose of tunnel type 10?



Thanks,

weiguo

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Weiguo,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">You&#8217;re welcome.<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Haoweiguo [mailto:haoweiguo@hu=
awei.com]
<br>
<b>Sent:</b> Wednesday, November 11, 2015 8:17 PM<br>
<b>To:</b> John E Drake; Rabadan, Jorge (Jorge); sajassi@cisco.com<br>
<b>Cc:</b> bess@ietf.org<br>
<b>Subject:</b> RE: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">J=
ohn,</span><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,s=
ans-serif;color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">I=
t's clear, great thanks. Yes, it's needed in order to distinguish between a=
n advertising node that only support non-MPLS encapsulations and one that s=
upports MPLS and non-MPLS encapsulations. If
 has no this MPLS encapsulation type, the node that supports MPLS and non-M=
PLS encapsulations will deemed to be the node that only support non-MPLS en=
capsulations by remote EVPN PEs.</span><span style=3D"font-size:10.0pt;font=
-family:&quot;Tahoma&quot;,sans-serif;color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
hanks,</span><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;=
,sans-serif;color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">w=
eiguo</span><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black"><o:p></o:p></span></p>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:=
black">
<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
<div>
<div id=3D"divRpF391323">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">From:<=
/span></b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sa=
ns-serif;color:black"> John E Drake [jdrake@juniper.net]<br>
<b>Sent:</b> Wednesday, November 11, 2015 22:39<br>
<b>To:</b> Haoweiguo; Rabadan, Jorge (Jorge); <a href=3D"mailto:sajassi@cis=
co.com">
sajassi@cisco.com</a><br>
<b>Cc:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Weiguo,</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">It is needed in order to distinguish =
between an advertising node that only supports non-MPLS encapsulations and =
one that supports MPLS and non-MPLS encapsulations.&nbsp;
 An advertising node that only supports MPLS encapsulation does not need to=
 advertise anything.</span><span style=3D"color:black"><o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Haowei=
guo [<a href=3D"mailto:haoweiguo@huawei.com">mailto:haoweiguo@huawei.com</a=
>]
<br>
<b>Sent:</b> Wednesday, November 11, 2015 1:08 AM<br>
<b>To:</b> Rabadan, Jorge (Jorge); <a href=3D"mailto:sajassi@cisco.com">saj=
assi@cisco.com</a>; John E Drake<br>
<b>Cc:</b> <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
<b>Subject:</b> RE: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">J=
orge,</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">U=
nderstood, many thanks. Now that the default tunnel encapsulation is MPLS e=
ncapsulation, the tunnel type 10 seems to be unneccessary. So is the introd=
uction of tunnel type 10 just for further removing
 ambiguity? If i don't use the tunnel type 10 in MPLS based EVPN implementa=
tion(RFC 7432), it will also never incur any issue. Am i right?</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
hanks,</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">w=
eiguo</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"color:black">
<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
<div id=3D"divRpF728179">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">From:<=
/span></b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sa=
ns-serif;color:black"> BESS [bess-bounces@ietf.org] on behalf
 of Rabadan, Jorge (Jorge) [jorge.rabadan@alcatel-lucent.com]<br>
<b>Sent:</b> Wednesday, November 11, 2015 11:47<br>
<b>To:</b> Haoweiguo; <a href=3D"mailto:sajassi@cisco.com" target=3D"_blank=
">sajassi@cisco.com</a>;
<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@juniper.net<=
/a><br>
<b>Cc:</b> <a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org=
</a><br>
<b>Subject:</b> Re: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Weiguo,<o:p></o:p></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Well, if an RFC7432 impl=
ementation does not use the RFC5512 ext community, the following sentence i=
n the evan-overlay draft should help interoperability. I personally don&#82=
17;t see any issues.<o:p></o:p></span></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<pre style=3D"page-break-before:always"><span style=3D"color:black">If the =
BGP Encapsulation extended community is not present, then the<o:p></o:p></s=
pan></pre>
<pre style=3D"page-break-before:always"><span style=3D"color:black">&nbsp;&=
nbsp; default MPLS encapsulation or a statically configured encapsulation<o=
:p></o:p></span></pre>
<pre style=3D"page-break-before:always"><span style=3D"color:black">&nbsp;&=
nbsp; is assumed.<o:p></o:p></span></pre>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Thanks.<o:p></o:p></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Jorge<o:p></o:p></span><=
/p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:=
black">Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com" target=3D"_bla=
nk">haoweiguo@huawei.com</a>&gt;<br>
<b>Date: </b>Tuesday, November 10, 2015 at 7:03 PM<br>
<b>To: </b>Jorge Rabadan &lt;<a href=3D"mailto:jorge.rabadan@alcatel-lucent=
.com" target=3D"_blank">jorge.rabadan@alcatel-lucent.com</a>&gt;, &quot;<a =
href=3D"mailto:sajassi@cisco.com" target=3D"_blank">sajassi@cisco.com</a>&q=
uot; &lt;<a href=3D"mailto:sajassi@cisco.com" target=3D"_blank">sajassi@cis=
co.com</a>&gt;,
 &quot;<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@junip=
er.net</a>&quot; &lt;<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank=
">jdrake@juniper.net</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>RE: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">J=
orge,</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
hanks for your explanations. However, i still can't understand, i'm sorry.<=
/span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">R=
FC 5512 only defines IP tunnel type and encapsulation attribute, like L2TPv=
3,GRE and IP in IP.&nbsp; For RFC 5512, MPLS tunnel doesn't need to be defi=
ned specifically, it is default case. In RFC 7432,
 the tunnel type 10 also hasn't been defined. Later, when the EVPN for over=
lay network solution was proposed, the tunnel type 10 was introduced to dif=
ferentiate MPLS tunnel and VXLAN/NVGRE/MPLS Over GRE tunnel, because&nbsp;s=
ame route type 1,2,3,4 and 5 are used
 in both RFC 7432 and the draft 'draft-ietf-bess-evpn-overlay-02'. We need =
the tunnel type to clearly notify peer EVPN PE which tunnel(including MPLS =
tunnel type) should be used.&nbsp; So it introduced updates on RFC 7432 and=
 will incur some interoperbility issue
 for RFC 7432. Am i right?</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
hanks,</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">w=
eiguo</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:=
black">
<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
<div>
<div id=3D"divRpF357510">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">From:<=
/span></b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sa=
ns-serif;color:black"> BESS [<a href=3D"mailto:bess-bounces@ietf.org" targe=
t=3D"_blank">bess-bounces@ietf.org</a>]
 on behalf of Rabadan, Jorge (Jorge) [<a href=3D"mailto:jorge.rabadan@alcat=
el-lucent.com" target=3D"_blank">jorge.rabadan@alcatel-lucent.com</a>]<br>
<b>Sent:</b> Wednesday, November 11, 2015 0:01<br>
<b>To:</b> Haoweiguo; <a href=3D"mailto:sajassi@cisco.com" target=3D"_blank=
">sajassi@cisco.com</a>;
<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@juniper.net<=
/a><br>
<b>Cc:</b> <a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org=
</a><br>
<b>Subject:</b> Re: [bess] One question about 'draft-ietf-bess-evpn-overlay=
-02'</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Weiguo,&nbsp;<o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">There are already implem=
entations using value 10 in the RFC5512 BGP encap ext community.<o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">That is the value you wo=
uld have in RFC7432 compliant networks where you can also have overlay tunn=
els. Value 10 would indicate to the ingress PE that the route needs an MPLS=
 tunnel to be resolved.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Thx<o:p></o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Jorge<o:p></o:p></span><=
/p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:=
black">BESS &lt;<a href=3D"mailto:bess-bounces@ietf.org" target=3D"_blank">=
bess-bounces@ietf.org</a>&gt; on behalf of Haoweiguo &lt;<a href=3D"mailto:=
haoweiguo@huawei.com" target=3D"_blank">haoweiguo@huawei.com</a>&gt;<br>
<b>Date: </b>Tuesday, November 10, 2015 at 1:05 AM<br>
<b>To: </b>&quot;<a href=3D"mailto:sajassi@cisco.com" target=3D"_blank">saj=
assi@cisco.com</a>&quot; &lt;<a href=3D"mailto:sajassi@cisco.com" target=3D=
"_blank">sajassi@cisco.com</a>&gt;, &quot;<a href=3D"mailto:jdrake@juniper.=
net" target=3D"_blank">jdrake@juniper.net</a>&quot; &lt;<a href=3D"mailto:j=
drake@juniper.net" target=3D"_blank">jdrake@juniper.net</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>[bess] One question about 'draft-ietf-bess-evpn-overlay-02'=
</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">H=
i Ali &amp; John,</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
he draft of 'draft-ietf-bess-evpn-overlay-02' describes how EVPN can be use=
d for Overlay network, the overlay network includes VXLAN, NVGRE and MPLS O=
ver GRE.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">I=
n section 13 IANA considerations, several overlay tunnel types are requeste=
d as follows:</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">8=
&nbsp;&nbsp;&nbsp; VXLAN Encapsulation<br>
9&nbsp;&nbsp;&nbsp; NVGRE Encapsulation<br>
10&nbsp;&nbsp; MPLS Encapsulation&nbsp;&nbsp; (?)<br>
11&nbsp;&nbsp; MPLS in GRE Encapsulation<br>
12&nbsp;&nbsp; VXLAN GPE Encapsulation</span><span style=3D"color:black"><o=
:p></o:p></span></p>
<p><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">I=
MO, 8,9,11 and 12 are all overlay encapsulations, 10 is an exception. Would=
 you like to explain what's the purpose of tunnel type 10?</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
hanks,</span><span style=3D"color:black"><o:p></o:p></span></p>
<p style=3D"margin-bottom:12.0pt"><span style=3D"font-family:&quot;Calibri&=
quot;,sans-serif;color:black">weiguo</span><span style=3D"color:black"><o:p=
></o:p></span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
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To: John E Drake <jdrake@juniper.net>, "bess@ietf.org" <bess@ietf.org>
References: <486973F4-725A-4510-969F-AD9BC3D34B54@alcatel-lucent.com> <DD5FC8DE455C3348B94340C0AB5517334F8D6C1B@nkgeml501-mbs.china.huawei.com> <1F70DC8A-2BB5-40C7-89CA-03F6E0784B8B@alcatel-lucent.com> <DD5FC8DE455C3348B94340C0AB5517334F8D6C5B@nkgeml501-mbs.china.huawei.com> <SN1PR0501MB17092E0A7F8A69AD96A8C903C7130@SN1PR0501MB1709.namprd05.prod.outlook.com> <4550_1447317570_56445042_4550_858_1_56445041.3030507@orange.com> <SN1PR0501MB1709275548E6E98C1E5A7A60C7120@SN1PR0501MB1709.namprd05.prod.outlook.com>
From: Thomas Morin <thomas.morin@orange.com>
Organization: Orange
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Date: Thu, 12 Nov 2015 16:07:59 +0100
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Cc: Eric Rosen <erosen@juniper.net>
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
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Hi John,

2015-11-12, John E Drake:
>
> Why do you think it should be documented in Eric's draft rather than in the EVPN Overlay draft?

The issue applies beyond the context of E-VPN overlay specs, and exist 
in any context where different kinds of MPLS(/x) encaps can be mixed 
(E-VPN non-overlay, IP VPNs), which is addressed by Eric's draft.

Best,

-Thomas



>
>> -----Original Message-----
>> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of
>> thomas.morin@orange.com
>> Sent: Thursday, November 12, 2015 3:39 AM
>> To: bess@ietf.org
>> Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>>
>> HI John, Weiguo,
>>
>> John E Drake :
>>>
>>> It is needed in order to distinguish between an advertising node that
>>> only supports non-MPLS encapsulations and one that supports MPLS and
>>> non-MPLS encapsulations.  An advertising node that only supports MPLS
>>> encapsulation does not need to advertise anything.
>>>
>>
>> By the way, I suggested this to be documented in draft-rosen-idr-tunnel-
>> encaps [1].
>>
>> Best,
>>
>> -Thomas
>>
>> [1] http://www.ietf.org/mail-archive/web/idr/current/msg14732.html
>>
>>
>>> *From:*Haoweiguo [mailto:haoweiguo@huawei.com]
>>> *Sent:* Wednesday, November 11, 2015 1:08 AM
>>> *To:* Rabadan, Jorge (Jorge); sajassi@cisco.com; John E Drake
>>> *Cc:* bess@ietf.org
>>> *Subject:* RE: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>>>
>>> Jorge,
>>>
>>> Understood, many thanks. Now that the default tunnel encapsulation is
>>> MPLS encapsulation, the tunnel type 10 seems to be unneccessary. So is
>>> the introduction of tunnel type 10 just for further removing
>>> ambiguity? If i don't use the tunnel type 10 in MPLS based EVPN
>>> implementation(RFC 7432), it will also never incur any issue. Am i right?
>>>
>>> Thanks,
>>>
>>> weiguo
>>>
>>> ----------------------------------------------------------------------
>>> --
>>>
>>> *From:*BESS [bess-bounces@ietf.org] on behalf of Rabadan, Jorge
>>> (Jorge) [jorge.rabadan@alcatel-lucent.com]
>>> *Sent:* Wednesday, November 11, 2015 11:47
>>> *To:* Haoweiguo; sajassi@cisco.com <mailto:sajassi@cisco.com>;
>>> jdrake@juniper.net <mailto:jdrake@juniper.net>
>>> *Cc:* bess@ietf.org <mailto:bess@ietf.org>
>>> *Subject:* Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>>>
>>> Weiguo,
>>>
>>> Well, if an RFC7432 implementation does not use the RFC5512 ext
>>> community, the following sentence in the evan-overlay draft should
>>> help interoperability. I personally don’t see any issues.
>>>
>>> If the BGP Encapsulation extended community is not present, then the
>>>     default MPLS encapsulation or a statically configured encapsulation
>>>     is assumed.
>>>
>>> Thanks.
>>>
>>> Jorge
>>>
>>> *From: *Haoweiguo <haoweiguo@huawei.com
>> <mailto:haoweiguo@huawei.com>>
>>> *Date: *Tuesday, November 10, 2015 at 7:03 PM
>>> *To: *Jorge Rabadan <jorge.rabadan@alcatel-lucent.com
>>> <mailto:jorge.rabadan@alcatel-lucent.com>>, "sajassi@cisco.com
>>> <mailto:sajassi@cisco.com>" <sajassi@cisco.com
>>> <mailto:sajassi@cisco.com>>, "jdrake@juniper.net
>>> <mailto:jdrake@juniper.net>" <jdrake@juniper.net
>>> <mailto:jdrake@juniper.net>>
>>> *Cc: *"bess@ietf.org <mailto:bess@ietf.org>" <bess@ietf.org
>>> <mailto:bess@ietf.org>>
>>> *Subject: *RE: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>>>
>>>      Jorge,
>>>
>>>      Thanks for your explanations. However, i still can't understand,
>>>      i'm sorry.
>>>
>>>      RFC 5512 only defines IP tunnel type and encapsulation attribute,
>>>      like L2TPv3,GRE and IP in IP.  For RFC 5512, MPLS tunnel doesn't
>>>      need to be defined specifically, it is default case. In RFC 7432,
>>>      the tunnel type 10 also hasn't been defined. Later, when the EVPN
>>>      for overlay network solution was proposed, the tunnel type 10 was
>>>      introduced to differentiate MPLS tunnel and VXLAN/NVGRE/MPLS Over
>>>      GRE tunnel, because same route type 1,2,3,4 and 5 are used in both
>>>      RFC 7432 and the draft 'draft-ietf-bess-evpn-overlay-02'. We need
>>>      the tunnel type to clearly notify peer EVPN PE which
>>>      tunnel(including MPLS tunnel type) should be used.  So it
>>>      introduced updates on RFC 7432 and will incur some interoperbility
>>>      issue for RFC 7432. Am i right?
>>>
>>>      Thanks,
>>>
>>>      weiguo
>>>
>>>
>>> ----------------------------------------------------------------------
>>> --
>>>
>>>      *From:*BESS [bess-bounces@ietf.org <mailto:bess-bounces@ietf.org>]
>>>      on behalf of Rabadan, Jorge (Jorge)
>>>      [jorge.rabadan@alcatel-lucent.com
>>>      <mailto:jorge.rabadan@alcatel-lucent.com>]
>>>      *Sent:* Wednesday, November 11, 2015 0:01
>>>      *To:* Haoweiguo; sajassi@cisco.com <mailto:sajassi@cisco.com>;
>>>      jdrake@juniper.net <mailto:jdrake@juniper.net>
>>>      *Cc:* bess@ietf.org <mailto:bess@ietf.org>
>>>      *Subject:* Re: [bess] One question about
>>>      'draft-ietf-bess-evpn-overlay-02'
>>>
>>>      Weiguo,
>>>
>>>      There are already implementations using value 10 in the RFC5512
>>>      BGP encap ext community.
>>>
>>>      That is the value you would have in RFC7432 compliant networks
>>>      where you can also have overlay tunnels. Value 10 would indicate
>>>      to the ingress PE that the route needs an MPLS tunnel to be resolved.
>>>
>>>      Thx
>>>
>>>      Jorge
>>>
>>>      *From: *BESS <bess-bounces@ietf.org
>>>      <mailto:bess-bounces@ietf.org>> on behalf of Haoweiguo
>>>      <haoweiguo@huawei.com <mailto:haoweiguo@huawei.com>>
>>>      *Date: *Tuesday, November 10, 2015 at 1:05 AM
>>>      *To: *"sajassi@cisco.com <mailto:sajassi@cisco.com>"
>>>      <sajassi@cisco.com <mailto:sajassi@cisco.com>>,
>>>      "jdrake@juniper.net <mailto:jdrake@juniper.net>"
>>>      <jdrake@juniper.net <mailto:jdrake@juniper.net>>
>>>      *Cc: *"bess@ietf.org <mailto:bess@ietf.org>" <bess@ietf.org
>>>      <mailto:bess@ietf.org>>
>>>      *Subject: *[bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>>>
>>>          Hi Ali & John,
>>>
>>>          The draft of 'draft-ietf-bess-evpn-overlay-02' describes how
>>>          EVPN can be used for Overlay network, the overlay network
>>>          includes VXLAN, NVGRE and MPLS Over GRE.
>>>
>>>          In section 13 IANA considerations, several overlay tunnel
>>>          types are requested as follows:
>>>
>>>          8 VXLAN Encapsulation
>>>          9    NVGRE Encapsulation
>>>          10   MPLS Encapsulation   (?)
>>>          11   MPLS in GRE Encapsulation
>>>          12   VXLAN GPE Encapsulation
>>>
>>>          IMO, 8,9,11 and 12 are all overlay encapsulations, 10 is an
>>>          exception. Would you like to explain what's the purpose of
>>>          tunnel type 10?
>>>
>>>          Thanks,
>>>
>>>          weiguo
>>>
>>>
>>>
>>> _______________________________________________
>>> BESS mailing list
>>> BESS@ietf.org
>>> https://www.ietf.org/mailman/listinfo/bess
>>
>>


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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Hi Wim,

Thanks for your feedback.

With my co-chair hat, let met ask a few questions for the sake of well 
understanding the issue you raise.

Henderickx, Wim (Wim):
> I don’t support the adoption of this draft as a WG. There is a major 
> flaw in this proposal:
> Basically the encapsulation of VXLAN/NVGRE is incompatible with MPLS 
> IP-VPNs. VXLAN/NVGRE contains a MAC address and IP-VPNs don’t.

This comment only relates to a subset of the encaps proposed in the 
solution, right ?
(e.g. does not apply to MPLS/GRE and MPLS/UDP)

On VXLAN/NVGRE, do you challenge the fact that they would be used with a 
dummy MAC address that would be replaced by the right MAC by a sender 
based on an ARP request when needed ?

> The draft [...] introduces a lot of complexity for nothing.

Can you detail what you consider is a lot of complexity ?

>
> If we want to describe a model C VPN interconnect with a IP fabric in 
> a DC I recommend to do an informational RFC that describes this using 
> VXLAN-GPE, MPLSoGRE or MPLSoUDP encapsulation and retain the E2E MPLS 
> label we defined in RFC4364.

My understanding of this draft's value is the fact that it avoids having 
service-label related state (forwarding and BGP state) on the routers at 
the DC-WAN border.  This is one of the typical property of 4364 option 
C.    It is not obvious at all to me, based on existing spec, how to get 
the same benefit on the DC-side router in an architecture where the 
DC-side router also terminates the overlay tunnels.

Do you challenge the goal itself (not having service-label related state 
on the overlay tunnels router) or suggest that the same benefit can be 
achieved with less complexity ?

-Thomas

_________________________________________________________________________________________________________________________

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<html>
  <head>
    <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    <div class="moz-cite-prefix">Hi Wim,<br>
      <br>
      Thanks for your feedback.<br>
      <br>
      With my co-chair hat, let met ask a few questions for the sake of
      well understanding the issue you raise.<br>
      <br>
      Henderickx, Wim (Wim):<br>
    </div>
    <blockquote
      cite="mid:1214F6D7-7E00-4C95-82C4-349393828A92@alcatel-lucent.com"
      type="cite">
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      <div>
        <div style="font-family: Consolas, monospace; font-size: 12px;">I
          don’t support the adoption of this draft as a WG. There is a
          major flaw in this proposal:</div>
        <div style="font-family: Consolas, monospace; font-size: 12px;">Basically
          the encapsulation of VXLAN/NVGRE is incompatible with MPLS
          IP-VPNs. VXLAN/NVGRE contains a MAC address and IP-VPNs don’t.
          <br>
        </div>
      </div>
    </blockquote>
    <br>
    This comment only relates to a subset of the encaps proposed in the
    solution, right ?<br>
    (e.g. does not apply to MPLS/GRE and MPLS/UDP)<br>
    <br>
    On VXLAN/NVGRE, do you challenge the fact that they would be used
    with a dummy MAC address that would be replaced by the right MAC by
    a sender based on an ARP request when needed ?<br>
    <br>
    <blockquote type="cite">The draft [...] introduces a lot of
      complexity for nothing.</blockquote>
    <br>
    Can you detail what you consider is a lot of complexity ?<br>
    <br>
    <blockquote
      cite="mid:1214F6D7-7E00-4C95-82C4-349393828A92@alcatel-lucent.com"
      type="cite">
      <div>
        <div style="font-family: Consolas, monospace; font-size: 12px;"><br>
        </div>
        <div style="font-family: Consolas, monospace; font-size: 12px;">If
          we want to describe a model C VPN interconnect with a IP
          fabric in a DC I recommend to do an informational RFC that
          describes this using VXLAN-GPE, MPLSoGRE or MPLSoUDP
          encapsulation and retain the E2E MPLS label we defined in
          RFC4364.</div>
      </div>
      <div>
      </div>
    </blockquote>
    <br>
    My understanding of this draft's value is the fact that it avoids
    having service-label related state (forwarding and BGP state) on the
    routers at the DC-WAN border.  This is one of the typical property
    of 4364 option C.    It is not obvious at all to me, based on
    existing spec, how to get the same benefit on the DC-side router in
    an architecture where the DC-side router also terminates the overlay
    tunnels.<br>
    <br>
    Do you challenge the goal itself (not having service-label related
    state on the overlay tunnels router) or suggest that the same
    benefit can be achieved with less complexity ?<br>
    <br>
    -Thomas<br>
  <PRE>_________________________________________________________________________________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler
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they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and delete this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified.
Thank you.
</PRE></body>
</html>

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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Wim,

(below)

2015-11-12, Henderickx, Wim (Wim):
>
> Henderickx, Wim (Wim):
>> I don’t support the adoption of this draft as a WG. There is a major 
>> flaw in this proposal:
>> Basically the encapsulation of VXLAN/NVGRE is incompatible with MPLS 
>> IP-VPNs. VXLAN/NVGRE contains a MAC address and IP-VPNs don’t.
>
> This comment only relates to a subset of the encaps proposed in the 
> solution, right ?
> (e.g. does not apply to MPLS/GRE and MPLS/UDP)
>
> WH> even for the encapsulations that don’t have this issue, 1 the UDP 
> port proposal breaks some of the protocols so we should never do this,

Sorry to insist, but where do some protocol break when used with a 
non-standard port as dstport ?

> 2 for the IP addressing it is way to complex to configure and maintain.

I agree with that.

> As such the proposal for me would be to do the 3 label stack as we 
> have in standard MPLS option C which you can do with the 
> encapsulations I mentioned.
>
>
> On VXLAN/NVGRE, do you challenge the fact that they would be used with 
> a dummy MAC address that would be replaced by the right MAC by a 
> sender based on an ARP request when needed ?

Is the above the issue you had in mind about VXLAN and NVGRE ?


>
>> The draft [...] introduces a lot of complexity for nothing.
>
> Can you detail what you consider is a lot of complexity ?
> WH> UDP ports and IP address prefix maintenance

I agree for the alternative in which multiple IPs are used.
But I don't think using multiple port would be complex, the 
configuration on the box can simply consist of a range of ports to use 
and the rest would be (quite simply) automated.


>
>>
>> If we want to describe a model C VPN interconnect with a IP fabric in 
>> a DC I recommend to do an informational RFC that describes this using 
>> VXLAN-GPE, MPLSoGRE or MPLSoUDP encapsulation and retain the E2E MPLS 
>> label we defined in RFC4364.
>
> My understanding of this draft's value is the fact that it avoids 
> having service-label related state (forwarding and BGP state) on the 
> routers at the DC-WAN border.  This is one of the typical property of 
> 4364 option C.    It is not obvious at all to me, based on existing 
> spec, how to get the same benefit on the DC-side router in an 
> architecture where the DC-side router also terminates the overlay tunnels.
>
> Do you challenge the goal itself (not having service-label related 
> state on the overlay tunnels router) or suggest that the same benefit 
> can be achieved with less complexity ?
>
> WH> the proposal I mentioned is achieving the same goal w/o the 
> complexity in the DC GW and using already standardised mechanisms to 
> do so.

Let me try to recap.

For traffic going from the DC to the WAN, the DC/WAN router terminating 
the overlay will have to translate from for instance an MPLS/UDP/IP 
encap into an MPLS/MPLS(/MPLS) encap ; assuming that the bottom label 
isn't changed the information to determine the other label(s) has to be 
derived from the UDP or IP header.  The draft we discuss relies on the 
UDP port (or IP address).

You mention a 3-label option C, are you suggesting the use of 
MPLS/MPLS/UDP where the top MPLS label would play the role of the middle 
label in an typical 3-label option-C stack, and would be used to 
determine the destination-PE label between ASBRs ?

Best,

-Thomas


_________________________________________________________________________________________________________________________

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--------------020808050202090800040307
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<html>
  <head>
    <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    <div class="moz-cite-prefix">Wim,<br>
      <br>
      (below)<br>
      <br>
      2015-11-12, Henderickx, Wim (Wim):<br>
    </div>
    <blockquote
      cite="mid:31144DC0-E53C-4890-AD51-29A49C45F6DB@alcatel-lucent.com"
      type="cite">
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      <span id="OLK_SRC_BODY_SECTION">
        <div style="font-family:Calibri; font-size:12pt;
          text-align:left; color:black; BORDER-BOTTOM: medium none;
          BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT:
          0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;
          BORDER-RIGHT: medium none; PADDING-TOP: 3pt"><br>
        </div>
        <div>
          <div text="#000000" bgcolor="#FFFFFF">
            <div class="moz-cite-prefix">Henderickx, Wim (Wim):<br>
            </div>
            <blockquote
              cite="mid:1214F6D7-7E00-4C95-82C4-349393828A92@alcatel-lucent.com"
              type="cite">
              <div>
                <div style="font-family: Consolas, monospace; font-size:
                  12px;">I don’t support the adoption of this draft as a
                  WG. There is a major flaw in this proposal:</div>
                <div style="font-family: Consolas, monospace; font-size:
                  12px;">Basically the encapsulation of VXLAN/NVGRE is
                  incompatible with MPLS IP-VPNs. VXLAN/NVGRE contains a
                  MAC address and IP-VPNs don’t.
                  <br>
                </div>
              </div>
            </blockquote>
            <br>
            This comment only relates to a subset of the encaps proposed
            in the solution, right ?<br>
            (e.g. does not apply to MPLS/GRE and MPLS/UDP)</div>
        </div>
      </span>
      <div><br>
      </div>
      <div>WH&gt; even for the encapsulations that don’t have this
        issue, 1 the UDP port proposal breaks some of the protocols so
        we should never do this,</div>
    </blockquote>
    <br>
    Sorry to insist, but where do some protocol break when used with a
    non-standard port as dstport ?<br>
    <br>
    <blockquote
      cite="mid:31144DC0-E53C-4890-AD51-29A49C45F6DB@alcatel-lucent.com"
      type="cite">
      <div> 2 for the IP addressing it is way to complex to configure
        and maintain.</div>
    </blockquote>
    <br>
    I agree with that.<br>
    <br>
    <blockquote
      cite="mid:31144DC0-E53C-4890-AD51-29A49C45F6DB@alcatel-lucent.com"
      type="cite">
      <div> As such the proposal for me would be to do the 3 label stack
        as we have in standard MPLS option C which you can do with the
        encapsulations I mentioned.</div>
      <span id="OLK_SRC_BODY_SECTION">
        <div>
          <div text="#000000" bgcolor="#FFFFFF"><br>
            <br>
            On VXLAN/NVGRE, do you challenge the fact that they would be
            used with a dummy MAC address that would be replaced by the
            right MAC by a sender based on an ARP request when needed ?<br>
          </div>
        </div>
      </span></blockquote>
    <br>
    Is the above the issue you had in mind about VXLAN and NVGRE ?<br>
    <br>
    <br>
    <blockquote
      cite="mid:31144DC0-E53C-4890-AD51-29A49C45F6DB@alcatel-lucent.com"
      type="cite"><span id="OLK_SRC_BODY_SECTION">
        <div>
          <div text="#000000" bgcolor="#FFFFFF">
            <br>
            <blockquote type="cite">The draft [...] introduces a lot of
              complexity for nothing.</blockquote>
            <br>
            Can you detail what you consider is a lot of complexity ?<br>
          </div>
        </div>
      </span>
      <div>WH&gt; UDP ports and IP address prefix maintenance</div>
    </blockquote>
    <br>
    I agree for the alternative in which multiple IPs are used.<br>
    But I don't think using multiple port would be complex, the
    configuration on the box can simply consist of a range of ports to
    use and the rest would be (quite simply) automated.<br>
    <br>
    <br>
    <blockquote
      cite="mid:31144DC0-E53C-4890-AD51-29A49C45F6DB@alcatel-lucent.com"
      type="cite">
      <span id="OLK_SRC_BODY_SECTION">
        <div>
          <div text="#000000" bgcolor="#FFFFFF"><br>
            <blockquote
              cite="mid:1214F6D7-7E00-4C95-82C4-349393828A92@alcatel-lucent.com"
              type="cite">
              <div>
                <div style="font-family: Consolas, monospace; font-size:
                  12px;"><br>
                </div>
                <div style="font-family: Consolas, monospace; font-size:
                  12px;">If we want to describe a model C VPN
                  interconnect with a IP fabric in a DC I recommend to
                  do an informational RFC that describes this using
                  VXLAN-GPE, MPLSoGRE or MPLSoUDP encapsulation and
                  retain the E2E MPLS label we defined in RFC4364.</div>
              </div>
            </blockquote>
            <br>
            My understanding of this draft's value is the fact that it
            avoids having service-label related state (forwarding and
            BGP state) on the routers at the DC-WAN border.  This is one
            of the typical property of 4364 option C.    It is not
            obvious at all to me, based on existing spec, how to get the
            same benefit on the DC-side router in an architecture where
            the DC-side router also terminates the overlay tunnels.<br>
            <br>
            Do you challenge the goal itself (not having service-label
            related state on the overlay tunnels router) or suggest that
            the same benefit can be achieved with less complexity ?</div>
        </div>
      </span>
      <div><br>
      </div>
      <div>WH&gt; the proposal I mentioned is achieving the same goal
        w/o the complexity in the DC GW and using already standardised
        mechanisms to do so.<br>
      </div>
    </blockquote>
    <br>
    Let me try to recap.<br>
    <br>
    For traffic going from the DC to the WAN, the DC/WAN router
    terminating the overlay will have to translate from for instance an
    MPLS/UDP/IP encap into an MPLS/MPLS(/MPLS) encap ; assuming that the
    bottom label isn't changed the information to determine the other
    label(s) has to be derived from the UDP or IP header.  The draft we
    discuss relies on the UDP port (or IP address).<br>
    <br>
    You mention a 3-label option C, are you suggesting the use of
    MPLS/MPLS/UDP where the top MPLS label would play the role of the
    middle label in an typical 3-label option-C stack, and would be used
    to determine the destination-PE label between ASBRs ?<br>
    <br>
    Best,<br>
    <br>
    -Thomas<br>
    <br>
  <PRE>_________________________________________________________________________________________________________________________

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</PRE></body>
</html>

--------------020808050202090800040307--


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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: "draft-ietf-bess-mvpn-extranet@ietf.org" <draft-ietf-bess-mvpn-extranet@ietf.org>
Thread-Topic: AD Review of draft-ietf-bess-mvpn-extranet-03
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Subject: [bess] AD Review of draft-ietf-bess-mvpn-extranet-03
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Hi!

I just finished reading this document.

As mentioned by the WG chairs at the meeting in Yokohama, the technology in=
 bess can be complex and hard to penetrate for the average (or novice) read=
er.  While the target of documents like this one is not always the average =
(or novice) reader, it is important that those readers (including the IESG =
and other review directorates) are able to at least understand what's going=
 on.  Most of my comments (below) are around readability/clarity.

In general I found the document (relatively) not hard to follow, if you rea=
d it end-to-end =97 it may be harder for someone to jump in and read/review=
 a specific section without the benefit of building up to it.    Because of=
 the length of the document, it would be nice to include a "road map" to gu=
ide the reader (in general: "Section x talks about X, Section y covers Y, e=
tc.").  It might be easier to include references to the specific sections i=
n 1.4 (Overview).

This is a long standards track document, so it is bound to have a lot of no=
rmative language.  On one hand I don't want to go overboard with explicitly=
 mandating every little step..but at the same time we want to be clear as t=
o what is "actually required for interoperation or to limit behavior which =
has potential for causing harm" [RFC2119].  Due to the potential of bad con=
figurations resulting in incomplete/illdefined extranets, I can see why the=
 behavior around RTs would require normative language.  However, there are =
some places where the use of rfc2119 keywords may be lacking, not needed or=
 inconsistent.  An example of inconsistency is this paragraph from Section =
7.2.3.1. (When Inter-Site Shared Trees Are Used):

   If VRF-S exports a Source Active A-D route that contains C-S in the
   Multicast Source field of its NLRI, and if that VRF also exports a
   UMH-eligible route matching C-S, the Source Active A-D route MUST
   carry at least one RT in common with the UMH-eligible route.  The RT
   must be chosen such that the following condition holds: if VRF-R
   contains an extranet C-receiver allowed by policy to receive extranet
   traffic from C-S, then VRF-R imports both the UMH-eligible route and
   the Source Active A-D route.

.. If the "route MUST carry at least one RT", why isn't the condition to be=
 met also normative?  I don't want to belabor on this specific case, it is =
just an example.  However, I would appreciate it if the authors would scan =
the document for required or unneeded normative language.  I pointed at som=
e cases in my comments below.

I do have a couple of items that I think are Major (see below) that I would=
 like to see addressed before starting the IETF Last Call.






Major:

  1.  Section 1.3. (Clarification on Use of Route Distinguishers) uses the =
word "REQUIREs" in a couple of places.  In a strict manner, the rfc2119 key=
 words is "REQUIRED".  While I think that the meaning of using "REQUIREs" s=
hould be obvious, please rephrase the text to strictly use the rfc2119 lang=
uage.
  2.  Section 10 (Security Considerations)
     *   What is a "VPN security violation"?  It is mentioned in several pl=
aces, but it is not explicitly defined.  Please either add a reference or b=
e clear in what it is.
     *   Misconfiguration is a significant risk, for example assigning the =
wrong RTs to the wrong routes.  I think that risk should be mentioned.

Minor:

  1.  Section 1.1. (Terminology): "We will sometimes say that a route "matc=
hes" a particular host if the route matches an IP address of the host."  Gi=
ven the previous definition (in the same paragraph) of "match" ("the addres=
s prefix of the given route is the longest match in that VRF for the given =
IP address") and the use of match there makes it unclear whether you're tal=
king about a host route or just the longest match.
  2.  Section 1.3. (Clarification on Use of Route Distinguishers)
     *   This section explains the "unique VRF per RD" condition a couple o=
f times =97 even though the explanation seems to be the same, it would be n=
ice if it was explained only once.
     *   ""default RD" (discussed above)"  Where this text appears is in fa=
ct the first time that a "default RD" is mentioned.  I'm guessing that this=
 refers to the RD in the "unique VRF per RD" condition, but please don't ma=
ke the reader guess.
  3.  Section 4.1. (UMH-Eligible Routes)  The "MAY" in the second paragraph=
 appears to be part of the example.  Suggested new text:
     *   The UMH-eligible extranet C-source routes do not necessarily have =
to   be unicast routes, they MAY be SAFI-129 routes (see Section 5.1.1 of  =
 [RFC6513]).  If one wants, e.g., a VPN-R C-receiver to be able   to receiv=
e extranet C-flows from C-sources in VPN-S, but one does not   want any VPN=
-R system to be able to send unicast traffic to those   C-sources, then the=
 UMH-eligible routes exported from VPN-S and   imported by VPN-R may be SAF=
I-129 routes.  The SAFI-129 routes are    used only for UMH determination, =
but not for unicast routing.
  4.  Section 4.2. (Distribution of Unicast Routes Matching C-RPs and DRs) =
 "It follows that if a VRF contains C-S, but does not contain a C-RP for C-=
G, then the VRF must import a unicast route matching a C-RP for C-G." and "=
Similarly, if a VRF contains a C-RP for C-G, but does not contain C-S, the =
VRF must import a unicast route matching the DR for C-S."  Should those "mu=
st" be a "MUST"?
  5.  Section 4.4.1. (The Extranet Source Extended Community)  "=85only use=
ful when all the extranet routes from a given VRF are exported with exactly=
 the same set of RTs.  (Cf.  Section 4.3.1 of [RFC4364], which does provide=
 a mechanism=85"   Is there any inference that should be made from this tex=
t?  Should the Extranet Source Extended Community not be used when the mech=
anism in rfc4364 is used?  Any downsides if both are used?
  6.  Section 5.2. (Considerations for Particular Inclusive Tunnel Types)
     *   Please include a reference (or definition) for "inclusive tunnel" =
(maybe in the Terminology).  I couldn't find one in rfc6513, but did in rfc=
7582.
     *   The third paragraph ("In order for VRF-S to set up the P2MP=85") s=
eems to explain what is needed for the setup, which is something that I ass=
ume is standardized in a different document.  If so, then the "MUST" should=
n't be normative in this document.  s/MUST/must
  7.  Section 7.2.1. (Intra-AS I-PMSI A-D Routes)  "As specified in [RFC651=
4]=85the RTs carried by that route MUST be chosen=85"  That "MUST" is reall=
y in reference to rfc6514, so it shouldn't be normative in this document.  =
If you want to stress the "MUST", then one solution could be to quote the r=
elevant text; otherwise s/MUST/must
  8.  It would be nice if section names were used in addition to section nu=
mbers when referring to them in the text =97 that would make it easier to r=
ecall (or look forward to) the text w/out having to go look at the TOC over=
 and over.  [This point may be able to be addressed by the RFC Editor.]  It=
 looks like you started doing this in some places in Section 7, but it is n=
ot consistent.
  9.  In several places the text reads: "This document provides procedures=
=85"  Please include a reference to the section where those procedures are.
  10. Please expand on first use:
     *   s/S-PMSI/Selective Provider Multicast Service Interface (S-PMSI)
     *    s/SSM/source-specific multicast (SSM)
     *    s/I-PMSI/Inclusive-PMSI (I-PMSI)
     *    s/MI-PMSI/Multidirectional I-PMSI (MI-PMSI)
  11. References: Update the reference to rfc4601 to draft-ietf-pim-rfc4601=
bis.

Nits:

  1.  Some replacements:
     *   s/misdelivery of data in those scenarios are outlined in those Sec=
tion 2.3/misdelivery of data in those scenarios are outlined in Section 2.3
     *   (6.3.1) s/and Each such/and each such
     *   (7.1) s/"corresponds to" to/"corresponds" to

--_000_D2688C8AE97D0aretanaciscocom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space;">
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
Hi!</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
I just finished reading this document.</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
As mentioned by the WG chairs at the meeting in Yokohama, the technology in=
 bess can be complex and hard to penetrate for the average (or novice) read=
er.&nbsp;&nbsp;While the target of documents like this one is not always th=
e average (or novice) reader, it is important
 that those readers (including the IESG and other review directorates) are =
able to at least understand what's going on. &nbsp;Most of my comments (bel=
ow) are around readability/clarity. &nbsp;</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
In general I found the document (relatively) not hard to follow, if you rea=
d it end-to-end =97 it may be harder for someone to jump in and read/review=
 a specific section without the benefit of building up to it. &nbsp; &nbsp;=
Because of the length of the document, it would
 be nice to include a &quot;road map&quot; to guide the reader (in general:=
 &quot;Section x talks about X, Section y covers Y, etc.&quot;).&nbsp;&nbsp=
;It might be easier to include references to the specific sections in 1.4 (=
Overview).</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
This is a long standards track document, so it is bound to have a lot of no=
rmative language.&nbsp;&nbsp;On one hand I don't want to go overboard with =
explicitly mandating every little step..but at the same time we want to be =
clear as to what is &quot;actually required for
 interoperation or to limit behavior which has potential for causing harm&q=
uot; [RFC2119].&nbsp;&nbsp;Due to the potential of bad configurations resul=
ting in incomplete/illdefined extranets, I can see why the behavior around =
RTs would require normative language.&nbsp;&nbsp;However,
 there are some places where the use of rfc2119 keywords may be lacking, no=
t needed or inconsistent.&nbsp;&nbsp;An example of inconsistency is this pa=
ragraph from Section 7.2.3.1. (When Inter-Site Shared Trees Are Used):</div=
>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-size: 14px;"><font face=3D"Consolas=
">&nbsp;&nbsp; If VRF-S exports a Source Active A-D route that contains C-S=
 in the</font></div>
<div style=3D"color: rgb(0, 0, 0); font-size: 14px;"><font face=3D"Consolas=
">&nbsp;&nbsp; Multicast Source field of its NLRI, and if that VRF also exp=
orts a</font></div>
<div style=3D"color: rgb(0, 0, 0); font-size: 14px;"><font face=3D"Consolas=
">&nbsp;&nbsp; UMH-eligible route matching C-S, the Source Active A-D route=
 MUST</font></div>
<div style=3D"color: rgb(0, 0, 0); font-size: 14px;"><font face=3D"Consolas=
">&nbsp;&nbsp; carry at least one RT in common with the UMH-eligible route.=
&nbsp;&nbsp;The RT</font></div>
<div style=3D"color: rgb(0, 0, 0); font-size: 14px;"><font face=3D"Consolas=
">&nbsp;&nbsp; must be chosen such that the following condition holds: if V=
RF-R</font></div>
<div style=3D"color: rgb(0, 0, 0); font-size: 14px;"><font face=3D"Consolas=
">&nbsp;&nbsp; contains an extranet C-receiver allowed by policy to receive=
 extranet</font></div>
<div style=3D"color: rgb(0, 0, 0); font-size: 14px;"><font face=3D"Consolas=
">&nbsp;&nbsp; traffic from C-S, then VRF-R imports both the UMH-eligible r=
oute and</font></div>
<div style=3D"color: rgb(0, 0, 0); font-size: 14px;"><font face=3D"Consolas=
">&nbsp;&nbsp; the Source Active A-D route.</font></div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
.. If the &quot;route MUST carry at least one RT&quot;, why isn't the condi=
tion to be met also normative?&nbsp;&nbsp;I don't want to belabor on this s=
pecific case, it is just an example. &nbsp;However, I would appreciate it i=
f the authors would scan the document for required or unneeded
 normative language. &nbsp;I pointed at some cases in my comments below.</d=
iv>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
I do have a couple of items that I think are Major (see below) that I would=
 like to see addressed before starting the IETF Last Call.</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
Major:</div>
<ol style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-si=
ze: 14px;">
<li>Section 1.3. (Clarification on Use of Route Distinguishers) uses the wo=
rd &quot;REQUIREs&quot; in a couple of places.&nbsp;&nbsp;In a strict manne=
r, the rfc2119 key words is &quot;REQUIRED&quot;.&nbsp;&nbsp;While I think =
that the meaning of using &quot;REQUIREs&quot; should be obvious, please re=
phrase
 the text to strictly use the rfc2119 language.</li><li>Section 10 (Securit=
y Considerations)
<ul>
<li>What is a &quot;VPN security violation&quot;? &nbsp;It is mentioned in =
several places, but it is not explicitly defined. &nbsp;Please either add a=
 reference or be clear in what it is.</li><li>Misconfiguration is a signifi=
cant risk, for example assigning the wrong RTs to the wrong routes. &nbsp;I=
 think that risk should be mentioned.</li></ul>
</li></ol>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
<br>
</div>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
Minor:</div>
<ol>
<li style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-si=
ze: 14px;">
Section 1.1. (Terminology): &quot;We will sometimes say that a route &quot;=
matches&quot; a particular host if the route matches an IP address of the h=
ost.&quot; &nbsp;Given the previous definition (in the same paragraph) of &=
quot;match&quot; (&quot;the address prefix of the given route is the longes=
t
 match in that VRF for the given IP address&quot;) and the use of match the=
re makes it unclear whether you're talking about a host route or just the l=
ongest match.</li><li style=3D"color: rgb(0, 0, 0); font-family: Calibri, s=
ans-serif; font-size: 14px;">
Section 1.3. (Clarification on Use of Route Distinguishers)
<ul style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-si=
ze: 14px;">
<li>This section explains the &quot;unique VRF per RD&quot; condition a cou=
ple of times =97 even though the explanation seems to be the same, it would=
 be nice if it was explained only once.</li><li>&quot;&quot;default RD&quot=
; (discussed above)&quot;&nbsp;&nbsp;Where this text appears is in fact the=
 first time that a &quot;default RD&quot; is mentioned.&nbsp;&nbsp;I'm gues=
sing that this refers to the RD in the &quot;unique VRF per RD&quot; condit=
ion, but please don't make the reader guess.</li></ul>
</li><li style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; fo=
nt-size: 14px;">
Section 4.1. (UMH-Eligible Routes)&nbsp;&nbsp;The &quot;MAY&quot; in the se=
cond paragraph appears to be part of the example.&nbsp;&nbsp;Suggested new =
text:
<ul style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-si=
ze: 14px;">
<li>The UMH-eligible extranet C-source routes do not necessarily have to&nb=
sp;&nbsp; be unicast routes, they MAY be SAFI-129 routes (see Section 5.1.1=
 of&nbsp;&nbsp; [RFC6513]).&nbsp;&nbsp;If one wants, e.g., a VPN-R C-receiv=
er to be able&nbsp;&nbsp; to receive extranet C-flows from C-sources in
 VPN-S, but one does not&nbsp;&nbsp; want any VPN-R system to be able to se=
nd unicast traffic to those&nbsp;&nbsp; C-sources, then the UMH-eligible ro=
utes exported from VPN-S and&nbsp;&nbsp; imported by VPN-R may be SAFI-129 =
routes.&nbsp;&nbsp;The SAFI-129 routes are&nbsp;&nbsp;&nbsp;&nbsp;used only=
 for UMH determination,
 but not for unicast routing.</li></ul>
</li><li style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; fo=
nt-size: 14px;">
Section 4.2. (Distribution of Unicast Routes Matching C-RPs and DRs)&nbsp;&=
nbsp;&quot;It follows that if a VRF contains C-S, but does not contain a C-=
RP for C-G, then the VRF must import a unicast route matching a C-RP for C-=
G.&quot; and &quot;Similarly, if a VRF contains a C-RP for
 C-G, but does not contain C-S, the VRF must import a unicast route matchin=
g the DR for C-S.&quot;&nbsp;&nbsp;Should those &quot;must&quot; be a &quot=
;MUST&quot;?</li><li style=3D"color: rgb(0, 0, 0); font-family: Calibri, sa=
ns-serif; font-size: 14px;">
Section 4.4.1. (The Extranet Source Extended Community)&nbsp;&nbsp;&quot;=
=85only useful when all the extranet routes from a given VRF are exported w=
ith exactly the same set of RTs.&nbsp;&nbsp;(Cf.&nbsp;&nbsp;Section 4.3.1 o=
f [RFC4364], which does provide a mechanism=85&quot;&nbsp;&nbsp; Is there a=
ny inference
 that should be made from this text?&nbsp;&nbsp;Should the Extranet Source =
Extended Community not be used when the mechanism in rfc4364 is used?&nbsp;=
&nbsp;Any downsides if both are used?</li><li style=3D"color: rgb(0, 0, 0);=
 font-family: Calibri, sans-serif; font-size: 14px;">
Section 5.2. (Considerations for Particular Inclusive Tunnel Types) &nbsp;
<ul style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-si=
ze: 14px;">
<li>Please include a reference (or definition) for &quot;inclusive tunnel&q=
uot; (maybe in the Terminology).&nbsp;&nbsp;I couldn't find one in rfc6513,=
 but did in rfc7582.</li><li>The third paragraph (&quot;In order for VRF-S =
to set up the P2MP=85&quot;) seems to explain what is needed for the setup,=
 which is something that I assume is standardized in a different document.&=
nbsp;&nbsp;If so, then the &quot;MUST&quot; shouldn't be normative in this =
document.&nbsp;&nbsp;s/MUST/must</li></ul>
</li><li style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; fo=
nt-size: 14px;">
Section 7.2.1. (Intra-AS I-PMSI A-D Routes)&nbsp;&nbsp;&quot;As specified i=
n [RFC6514]=85the RTs carried by that route MUST be chosen=85&quot;&nbsp;&n=
bsp;That &quot;MUST&quot; is really in reference to rfc6514, so it shouldn'=
t be normative in this document.&nbsp;&nbsp;If you want to stress the &quot=
;MUST&quot;, then one
 solution could be to quote the relevant text; otherwise s/MUST/must</li><l=
i style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-size=
: 14px;">
It would be nice if section names were used in addition to section numbers =
when referring to them in the text =97 that would make it easier to recall =
(or look forward to) the text w/out having to go look at the TOC over and o=
ver. &nbsp;[This point may be able to be
 addressed by the RFC Editor.] &nbsp;It looks like you started doing this i=
n some places in Section 7, but it is not consistent.</li><li style=3D"colo=
r: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-size: 14px;">
In several places the text reads: &quot;This document provides procedures=
=85&quot;&nbsp;&nbsp;Please include a reference to the section where those =
procedures are.</li><li style=3D"color: rgb(0, 0, 0); font-family: Calibri,=
 sans-serif; font-size: 14px;">
Please expand on first use:
<ul style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-si=
ze: 14px;">
<li>s/S-PMSI/Selective Provider Multicast Service Interface (S-PMSI)</li><l=
i>&nbsp;s/SSM/source-specific multicast (SSM)</li><li>&nbsp;s/I-PMSI/Inclus=
ive-PMSI (I-PMSI)</li><li>&nbsp;s/MI-PMSI/Multidirectional I-PMSI (MI-PMSI)=
</li></ul>
</li><li style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; fo=
nt-size: 14px;">
References: Update the reference to rfc4601 to draft-ietf-pim-rfc4601bis.</=
li></ol>
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-s=
ize: 14px;">
Nits:</div>
<ol>
<li>Some replacements:
<ul>
<li>s/misdelivery of data in those scenarios are outlined in those Section =
2.3/misdelivery of data in those scenarios are outlined in Section 2.3</li>=
<li>(6.3.1) s/and Each such/and each such</li><li>(7.1) s/&quot;corresponds=
 to&quot; to/&quot;corresponds&quot; to</li></ul>
</li></ol>
</body>
</html>

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From: Haoweiguo <haoweiguo@huawei.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>
Thread-Topic: draft-hao-bess-inter-nvo3-vpn-optionc
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Date: Fri, 13 Nov 2015 01:44:07 +0000
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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--_000_DD5FC8DE455C3348B94340C0AB5517334F8D8127nkgeml501mbschi_
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Hi Wim,

It is used for layer 3 VPN CE device to visit IP based overlay data center =
network. For layer 3 traffic forwarding, the MAC address in VXLAN/NVGRE is =
restricted only in data center inside domain. For the traffic from data cen=
ter inside to outside,  the inner MAC address(destination MAC is ASBR-d's M=
AC, src MAC is NVE's MAC) in VXLAN/NVGRE will be dropped at ASBR-d, only IP=
 payload will continue to be carried into MPLS network. I can emphasize thi=
s point in my later version, it doesn't have much impact on the whole solut=
ion.

This draft also is suitable for VXLAN-GPE and MPLSoGRE/MPLSoUDP network to =
interconnect with MPLS VPN network. In VXLAN-GPE, it supports IP in IP enca=
psulation, so no inner MAC concerns.



Thanks,

weiguo

________________________________

From: BESS [bess-bounces@ietf.org] on behalf of Henderickx, Wim (Wim) [wim.=
henderickx@alcatel-lucent.com]
Sent: Thursday, November 12, 2015 22:33
To: bess@ietf.org
Subject: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

I don=92t support the adoption of this draft as a WG. There is a major flaw=
 in this proposal:
Basically the encapsulation of VXLAN/NVGRE is incompatible with MPLS IP-VPN=
s. VXLAN/NVGRE contains a MAC address and IP-VPNs don=92t. The draft does n=
ot talk about any of this and introduces a lot of complexity for nothing.

If we want to describe a model C VPN interconnect with a IP fabric in a DC =
I recommend to do an informational RFC that describes this using VXLAN-GPE,=
 MPLSoGRE or MPLSoUDP encapsulation and retain the E2E MPLS label we define=
d in RFC4364.

--_000_DD5FC8DE455C3348B94340C0AB5517334F8D8127nkgeml501mbschi_
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Content-Transfer-Encoding: quoted-printable

<html dir=3D"ltr">
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
<style id=3D"owaParaStyle">P {
	MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
</style>
</head>
<body style=3D"FONT-FAMILY: Calibri,sans-serif; WORD-WRAP: break-word; COLO=
R: rgb(0,0,0); FONT-SIZE: 14px" fPStyle=3D"1" ocsi=3D"0">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">
<p><font size=3D"3">Hi Wim,</font></p>
<p><font size=3D"3">It is used for layer 3 VPN CE device to visit IP based =
overlay data center network. For layer 3 traffic forwarding, the MAC addres=
s in VXLAN/NVGRE is restricted only in data center inside domain. For the t=
raffic from data center inside to
 outside,&nbsp; the inner MAC address(destination MAC is ASBR-d's MAC, src =
MAC is NVE's MAC) in VXLAN/NVGRE will be dropped at ASBR-d, only IP payload=
 will continue to be carried into MPLS network. I can emphasize this point =
in my later version, it doesn't have
 much impact on the whole solution.</font></p>
<p><font size=3D"3">This draft also is suitable for VXLAN-GPE and MPLSoGRE/=
MPLSoUDP network to interconnect with MPLS VPN network. In VXLAN-GPE, it su=
pports IP in IP encapsulation, so no inner MAC concerns.</font></p>
<p><font size=3D"3"></font>&nbsp;</p>
<p><font size=3D"3">Thanks,</font></p>
<p><font size=3D"3">weiguo</font></p>
<p></p>
<hr tabindex=3D"-1">
<p></p>
<div style=3D"FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px=
">
<div style=3D"DIRECTION: ltr" id=3D"divRpF838565"><font color=3D"#000000" s=
ize=3D"2" face=3D"Tahoma"><b>From:</b> BESS [bess-bounces@ietf.org] on beha=
lf of Henderickx, Wim (Wim) [wim.henderickx@alcatel-lucent.com]<br>
<b>Sent:</b> Thursday, November 12, 2015 22:33<br>
<b>To:</b> bess@ietf.org<br>
<b>Subject:</b> [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br>
</font><br>
</div>
<div></div>
<div>
<div>
<div style=3D"FONT-FAMILY: Consolas,monospace; FONT-SIZE: 12px">I don=92t s=
upport the adoption of this draft as a WG. There is a major flaw in this pr=
oposal:</div>
<div style=3D"FONT-FAMILY: Consolas,monospace; FONT-SIZE: 12px">Basically t=
he encapsulation of VXLAN/NVGRE is incompatible with MPLS IP-VPNs. VXLAN/NV=
GRE contains a MAC address and IP-VPNs don=92t. The draft does not talk abo=
ut any of this and introduces a lot
 of complexity for nothing.</div>
<div style=3D"FONT-FAMILY: Consolas,monospace; FONT-SIZE: 12px"><br>
</div>
<div style=3D"FONT-FAMILY: Consolas,monospace; FONT-SIZE: 12px">If we want =
to describe a model C VPN interconnect with a IP fabric in a DC I recommend=
 to do an informational RFC that describes this using VXLAN-GPE, MPLSoGRE o=
r MPLSoUDP encapsulation and retain
 the E2E MPLS label we defined in RFC4364.</div>
</div>
<div>
<div id=3D"MAC_OUTLOOK_SIGNATURE"></div>
</div>
</div>
</div>
</div>
</body>
</html>

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From: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>
To: Haoweiguo <haoweiguo@huawei.com>
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From nobody Fri Nov 13 00:58:01 2015
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To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>
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From: Thomas Morin <thomas.morin@orange.com>
Organization: Orange
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Date: Fri, 13 Nov 2015 09:57:56 +0100
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Hi Wim,

I agree on the analysis that this proposal is restricted to 
implementations that supports the chosen encap with non-IANA ports 
(which may be hard to achieve for instance on hardware implementations, 
as you suggest), or to context where managing multiple IPs would be 
operationally viable.

However, it does not seem obvious to me how the alternative you propose 
[relying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] 
addresses the issue of whether the encap behavior is supported or not 
(e.g. your typical ToR chipset possibly may not support this kind of 
encap,  and even software-based switches may not be ready to support 
that today).

My take is that having different options to adapt to various 
implementations constraints we may have would have value.

(+ one question below on VXLAN...)

-Thomas


2015-11-12, Henderickx, Wim (Wim):
>> On VXLAN/NVGRE, do you challenge the fact that they would be used 
>> with a dummy MAC address that would be replaced by the right MAC by a 
>> sender based on an ARP request when needed ?
>
> Is the above the issue you had in mind about VXLAN and NVGRE ?
>
> WH> yes

I you don't mind me asking : why do you challenge that ?



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<html>
  <head>
    <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    <div class="moz-cite-prefix">Hi Wim,<br>
      <br>
      I agree on the analysis that this proposal is restricted to
      implementations that supports the chosen encap with non-IANA ports
      (which may be hard to achieve for instance on hardware
      implementations, as you suggest), or to context where managing
      multiple IPs would be operationally viable.   <br>
      <br>
      However, it does not seem obvious to me how the alternative you
      propose [relying on 3-label option C with an MPLS/MPLS/(UDP|GRE)
      encap] addresses the issue of whether the encap behavior is
      supported or not (e.g. your typical ToR chipset possibly may not
      support this kind of encap,  and even software-based switches may
      not be ready to support that today).<br>
      <br>
      My take is that having different options to adapt to various
      implementations constraints we may have would have value.<br>
      <br>
      (+ one question below on VXLAN...)<br>
      <br>
      -Thomas<br>
      <br>
      <br>
      2015-11-12, Henderickx, Wim (Wim):<br>
    </div>
    <blockquote
      cite="mid:94504E5E-B0D8-41DC-8967-E860E46F4C92@alcatel-lucent.com"
      type="cite">
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      <span id="OLK_SRC_BODY_SECTION">
        <div>
          <div text="#000000" bgcolor="#FFFFFF">
            <blockquote
              cite="mid:31144DC0-E53C-4890-AD51-29A49C45F6DB@alcatel-lucent.com"
              type="cite">On VXLAN/NVGRE, do you challenge the fact that
              they would be used with a dummy MAC address that would be
              replaced by the right MAC by a sender based on an ARP
              request when needed ?<br>
              <span id="OLK_SRC_BODY_SECTION">
                <div>
                </div>
              </span></blockquote>
            <br>
            Is the above the issue you had in mind about VXLAN and NVGRE
            ?</div>
        </div>
      </span>
      <div><br>
      </div>
      <div>WH&gt; yes</div>
    </blockquote>
    <br>
    I you don't mind me asking : why do you challenge that ?<br>
    <br>
    <br>
  </body>
</html>

--------------080608030700020000060607--


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From: John E Drake <jdrake@juniper.net>
To: "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
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From: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>
To: Thomas Morin <thomas.morin@orange.com>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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From nobody Fri Nov 13 07:31:34 2015
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From: Thomas Morin <thomas.morin@orange.com>
Organization: Orange
To: BESS <bess@ietf.org>
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Date: Fri, 13 Nov 2015 16:31:15 +0100
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Cc: IDR Chairs <idr-chairs@tools.ietf.org>, BESS Chairs <bess-chairs@ietf.org>
Subject: [bess] IDR accepting post-WGLC comments on draft-ietf-idr-rtc-no-rt
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Hi working group,

draft-ietf-idr-rtc-no-rt has passed working group last call in IDR on 
June 22th and the shepherd noticed that considering that specs being 
worked on in BESS are the primary use case, comments from BESS working 
group could have been solicited.

Hence, IDR chairs have proposed to accept comments on these specs until 
November 27th to let BESS contributors the opportunity to comment.

Please send any comment you have on the idr mailing list.

Best,

-Thomas/Martin


From nobody Fri Nov 13 08:10:42 2015
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From: Lucy yong <lucy.yong@huawei.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, Haoweiguo <haoweiguo@huawei.com>
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From: <thomas.morin@orange.com>
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Hi Wim,

2015-11-13, Henderickx, Wim (Wim):
> Thomas, we need a solution that is implementable and will scale in 
> control/data-plane. As such the solution I outline is standardised 
> today and does not need new extensions in control/data-plane. Hence 
> informational draft and can be implemented if there is market demand.

The above argument would fully make sense to me if support 
MPLS/MPLS/(UDP or GRE) was common place in ToRs or vswitches.

> With respect to MAC you need to address both directions and does not 
> make sense to manage this if it is not required/doe snot add value.

On VXLAN and the Ethernet header: it looks to me that addressing both 
direction is just a matter of documenting in the draft (if not already 
there) what is the expected behavior for VXLAN/NVGRE. But VXLAN and 
NVGRE are not the only encaps proposed in the specs anyway.

Compared to 3-label option C, my understanding is that the added-value 
is to not require the support of an MPLS/MPLS/(UDP or GRE) encap in ToRs 
and vswitches.

The right trade-off to make may in fact depend on whether you prefer:
(a) a new dataplane stitching behavior on DC ASBRs (the behavior 
specified in this draft)
or (b) an evolution of the encaps on the vswitches and ToRs to support 
MPLS/MPLS/(UDP or GRE)

Note that the 3-label option C approach with an MPLS/MPLS/(UDP or GRE) 
encap also requires the introduction of a control plane in the DC 
(possibly in an 'SDN' controller) to learn and advertise the middle MPLS 
label.  Whether one consider that the best path to a working solution 
may also depend on the context.

Best,

-Thomas


>
> From: Thomas Morin <thomas.morin@orange.com 
> <mailto:thomas.morin@orange.com>>
> Organization: Orange
> Date: Friday 13 November 2015 at 09:57
> To: Wim Henderickx <wim.henderickx@alcatel-lucent.com 
> <mailto:wim.henderickx@alcatel-lucent.com>>
> Cc: "bess@ietf.org <mailto:bess@ietf.org>" <bess@ietf.org 
> <mailto:bess@ietf.org>>
> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>
> Hi Wim,
>
> I agree on the analysis that this proposal is restricted to 
> implementations that supports the chosen encap with non-IANA ports 
> (which may be hard to achieve for instance on hardware 
> implementations, as you suggest), or to context where managing 
> multiple IPs would be operationally viable.
>
> However, it does not seem obvious to me how the alternative you 
> propose [relying on 3-label option C with an MPLS/MPLS/(UDP|GRE) 
> encap] addresses the issue of whether the encap behavior is supported 
> or not (e.g. your typical ToR chipset possibly may not support this 
> kind of encap,  and even software-based switches may not be ready to 
> support that today).
>
> My take is that having different options to adapt to various 
> implementations constraints we may have would have value.
>
> (+ one question below on VXLAN...)
>
> -Thomas
>
>
> 2015-11-12, Henderickx, Wim (Wim):
>>> On VXLAN/NVGRE, do you challenge the fact that they would be used 
>>> with a dummy MAC address that would be replaced by the right MAC by 
>>> a sender based on an ARP request when needed ?
>>
>> Is the above the issue you had in mind about VXLAN and NVGRE ?
>>
>> WH> yes
>
> I you don't mind me asking : why do you challenge that ?
>
>


_________________________________________________________________________________________________________________________

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--------------060001000403050704000802
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<html>
  <head>
    <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    <div class="moz-cite-prefix">Hi Wim,<br>
      <br>
      2015-11-13, Henderickx, Wim (Wim):<br>
    </div>
    <blockquote
      cite="mid:E3917F57-B9F4-417D-9E9B-8D1330CC2506@alcatel-lucent.com"
      type="cite">
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      <div>
        <div>
          <div>Thomas, we need a solution that is implementable and will
            scale in control/data-plane. As such the solution I outline
            is standardised today and does not need new extensions in
            control/data-plane. Hence informational draft and can be
            implemented if there is market demand.</div>
        </div>
      </div>
    </blockquote>
    <br>
    The above argument would fully make sense to me if support
    MPLS/MPLS/(UDP or GRE) was common place in ToRs or vswitches.<br>
    <br>
    <blockquote
      cite="mid:E3917F57-B9F4-417D-9E9B-8D1330CC2506@alcatel-lucent.com"
      type="cite">
      <div>
        <div>
          <div>With respect to MAC you need to address both directions
            and does not make sense to manage this if it is not
            required/doe snot add value.</div>
        </div>
      </div>
    </blockquote>
    <br>
    On VXLAN and the Ethernet header: it looks to me that addressing
    both direction is just a matter of documenting in the draft (if not
    already there) what is the expected behavior for VXLAN/NVGRE. But
    VXLAN and NVGRE are not the only encaps proposed in the specs
    anyway.<br>
    <br>
    Compared to 3-label option C, my understanding is that the
    added-value is to not require the support of an MPLS/MPLS/(UDP or
    GRE) encap in ToRs and vswitches.    <br>
    <br>
    The right trade-off to make may in fact depend on whether you
    prefer:<br>
    (a) a new dataplane stitching behavior on DC ASBRs (the behavior
    specified in this draft)<br>
    or (b) an evolution of the encaps on the vswitches and ToRs to
    support MPLS/MPLS/(UDP or GRE)<br>
    <br>
    Note that the 3-label option C approach with an MPLS/MPLS/(UDP or
    GRE) encap also requires the introduction of a control plane in the
    DC (possibly in an 'SDN' controller) to learn and advertise the
    middle MPLS label.  Whether one consider that the best path to a
    working solution may also depend on the context.<br>
    <br>
    Best,<br>
     
    <br>
    -Thomas<br>
    <br>
    <br>
    <blockquote
      cite="mid:E3917F57-B9F4-417D-9E9B-8D1330CC2506@alcatel-lucent.com"
      type="cite">
      <div>
        <div>
          <div>
          </div>
        </div>
      </div>
      <div><br>
      </div>
      <span id="OLK_SRC_BODY_SECTION">
        <div style="font-family:Calibri; font-size:12pt;
          text-align:left; color:black; BORDER-BOTTOM: medium none;
          BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT:
          0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;
          BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
          <span style="font-weight:bold">From: </span>Thomas Morin &lt;<a
            moz-do-not-send="true" href="mailto:thomas.morin@orange.com"><a class="moz-txt-link-abbreviated" href="mailto:thomas.morin@orange.com">thomas.morin@orange.com</a></a>&gt;<br>
          <span style="font-weight:bold">Organization: </span>Orange<br>
          <span style="font-weight:bold">Date: </span>Friday 13
          November 2015 at 09:57<br>
          <span style="font-weight:bold">To: </span>Wim Henderickx &lt;<a
            moz-do-not-send="true"
            href="mailto:wim.henderickx@alcatel-lucent.com"><a class="moz-txt-link-abbreviated" href="mailto:wim.henderickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a></a>&gt;<br>
          <span style="font-weight:bold">Cc: </span>"<a
            moz-do-not-send="true" href="mailto:bess@ietf.org"><a class="moz-txt-link-abbreviated" href="mailto:bess@ietf.org">bess@ietf.org</a></a>"
          &lt;<a moz-do-not-send="true" href="mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
          <span style="font-weight:bold">Subject: </span>Re: [bess]
          draft-hao-bess-inter-nvo3-vpn-optionc<br>
        </div>
        <div><br>
        </div>
        <div>
          <div bgcolor="#FFFFFF" text="#000000">
            <div class="moz-cite-prefix">Hi Wim,<br>
              <br>
              I agree on the analysis that this proposal is restricted
              to implementations that supports the chosen encap with
              non-IANA ports (which may be hard to achieve for instance
              on hardware implementations, as you suggest), or to
              context where managing multiple IPs would be operationally
              viable.   <br>
              <br>
              However, it does not seem obvious to me how the
              alternative you propose [relying on 3-label option C with
              an MPLS/MPLS/(UDP|GRE) encap] addresses the issue of
              whether the encap behavior is supported or not (e.g. your
              typical ToR chipset possibly may not support this kind of
              encap,  and even software-based switches may not be ready
              to support that today).<br>
              <br>
              My take is that having different options to adapt to
              various implementations constraints we may have would have
              value.<br>
              <br>
              (+ one question below on VXLAN...)<br>
              <br>
              -Thomas<br>
              <br>
              <br>
              2015-11-12, Henderickx, Wim (Wim):<br>
            </div>
            <blockquote
              cite="mid:94504E5E-B0D8-41DC-8967-E860E46F4C92@alcatel-lucent.com"
              type="cite">
              <span id="OLK_SRC_BODY_SECTION">
                <div>
                  <div text="#000000" bgcolor="#FFFFFF">
                    <blockquote
                      cite="mid:31144DC0-E53C-4890-AD51-29A49C45F6DB@alcatel-lucent.com"
                      type="cite">
                      On VXLAN/NVGRE, do you challenge the fact that
                      they would be used with a dummy MAC address that
                      would be replaced by the right MAC by a sender
                      based on an ARP request when needed ?<br>
                      <span id="OLK_SRC_BODY_SECTION">
                      </span></blockquote>
                    <br>
                    Is the above the issue you had in mind about VXLAN
                    and NVGRE ?</div>
                </div>
              </span>
              <div><br>
              </div>
              <div>WH&gt; yes</div>
            </blockquote>
            <br>
            I you don't mind me asking : why do you challenge that ?<br>
            <br>
            <br>
          </div>
        </div>
      </span>
    </blockquote>
    <br>
  <PRE>_________________________________________________________________________________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration,
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they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and delete this message and its attachments.
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Thank you.
</PRE></body>
</html>

--------------060001000403050704000802--


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From: <thomas.morin@orange.com>
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Cc: IDR <idr@ietf.org>, "Ali Sajassi \(sajassi\)" <sajassi@cisco.com>, Eric Rosen <erosen@juniper.net>
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02' and draft-ietf-idr-tunnel-encaps-00
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John,

(Cc'ing IDR.)

2015-11-13, John E Drake:
>
> I spoke with Eric and Ali and we would like to change both the
> overlay  draft and the tunnel encaps drafts as follows.
>
> For the overlay draft, replace this text in section 5.1.3:
>
> "If the BGP Encapsulation extended community is not present, then
> thedefault MPLS encapsulation or a statically configured encapsulation is
 > assumed."
>
> With the following:
>
> "Note that the MPLS encapsulation tunnel type is needed in order to
> distinguish between an advertising node that only supports non-MPLS
> encapsulations and one that supports MPLS and non-MPLS
> encapsulations. An advertising node that only supports MPLS
> encapsulation does not need to advertise any encapsulation tunnel
> types; i.e., if the BGP Encapsulation extended community is not
> present, then either MPLS encapsulation or a statically configured
> encapsulation is assumed."

Having more text to explain things in the overlay draft does not hurt.


>
> For the tunnel encaps draft, replace this text in section 5:
>
> "If the Tunnel Encapsulation attribute contains several TLVs (i.e.,
> ifit specifies several tunnels), router R may choose any one of those
 > tunnels, based upon local policy. If any of tunnels' TLVs contain the
 > Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512], the
> choice of tunnel may be influenced by these sub-TLVs."
>
> With the following:
>
> "If the Tunnel Encapsulation attribute contains several TLVs (i.e.,
> ifit specifies several tunnels), router R may choose any one of those
> tunnels, based upon local policy. If any of tunnels' TLVs contain the
> Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512], the
> choice of tunnel may be influenced by these sub-TLVs. Note that if none
> of the TLVs specifies the MPLS tunnel type, a Label Switched Path SHOULD
> NOT be used unless none of the TLVs specifies a feasible tunnel."

I think that the above will technically work.

*However* it would be a pity to *not* have the very useful clear-text 
explanation of the reason for the 'MPLS' type (what you propose to add 
above in the overlay draft) in  draft-ietf-idr-tunnel-encaps-00... why 
provide the smooth explanation for only one of the specs to which this 
'MPLS' type applies ?

>
> We hope this is satisfactory.

Close, but not quite there yet :)

Best,

-Thomas




>
>> -----Original Message-----
>> From: Thomas Morin [mailto:thomas.morin@orange.com]
>> Sent: Thursday, November 12, 2015 10:08 AM
>> To: John E Drake; bess@ietf.org
>> Cc: Eric Rosen
>> Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>>
>> Hi John,
>>
>> 2015-11-12, John E Drake:
>>>
>>> Why do you think it should be documented in Eric's draft rather than in the
>> EVPN Overlay draft?
>>
>> The issue applies beyond the context of E-VPN overlay specs, and exist in
>> any context where different kinds of MPLS(/x) encaps can be mixed (E-VPN
>> non-overlay, IP VPNs), which is addressed by Eric's draft.
>>
>> Best,
>>
>> -Thomas
>


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From: Lucy yong <lucy.yong@huawei.com>
To: "thomas.morin@orange.com" <thomas.morin@orange.com>, John E Drake <jdrake@juniper.net>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] One question about 'draft-ietf-bess-evpn-overlay-02' and draft-ietf-idr-tunnel-encaps-00
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Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02' and draft-ietf-idr-tunnel-encaps-00
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Hi John,

Since the tunnel encap draft goes with encap tunnel attribute and there was=
 no deployment of RFC5512, IMO, we should deprecate encapsulation extended =
community to keep a consistent method.=20

Thus, should the overlay draft states if BGP tunnel encapsulate attribute i=
s not present, ....

Regards,
Lucy=20

-----Original Message-----
From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of thomas.morin@orange.=
com
Sent: Friday, November 13, 2015 10:46 AM
To: John E Drake; bess@ietf.org
Cc: IDR; Ali Sajassi (sajassi); Eric Rosen
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02' an=
d draft-ietf-idr-tunnel-encaps-00

John,

(Cc'ing IDR.)

2015-11-13, John E Drake:
>
> I spoke with Eric and Ali and we would like to change both the overlay =20
> draft and the tunnel encaps drafts as follows.
>
> For the overlay draft, replace this text in section 5.1.3:
>
> "If the BGP Encapsulation extended community is not present, then=20
> thedefault MPLS encapsulation or a statically configured encapsulation=20
> is
 > assumed."
>
> With the following:
>
> "Note that the MPLS encapsulation tunnel type is needed in order to=20
> distinguish between an advertising node that only supports non-MPLS=20
> encapsulations and one that supports MPLS and non-MPLS encapsulations.=20
> An advertising node that only supports MPLS encapsulation does not=20
> need to advertise any encapsulation tunnel types; i.e., if the BGP=20
> Encapsulation extended community is not present, then either MPLS=20
> encapsulation or a statically configured encapsulation is assumed."

Having more text to explain things in the overlay draft does not hurt.


>
> For the tunnel encaps draft, replace this text in section 5:
>
> "If the Tunnel Encapsulation attribute contains several TLVs (i.e.,=20
> ifit specifies several tunnels), router R may choose any one of those
 > tunnels, based upon local policy. If any of tunnels' TLVs contain the  >=
 Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512], the
> choice of tunnel may be influenced by these sub-TLVs."
>
> With the following:
>
> "If the Tunnel Encapsulation attribute contains several TLVs (i.e.,=20
> ifit specifies several tunnels), router R may choose any one of those=20
> tunnels, based upon local policy. If any of tunnels' TLVs contain the=20
> Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512],=20
> the choice of tunnel may be influenced by these sub-TLVs. Note that if=20
> none of the TLVs specifies the MPLS tunnel type, a Label Switched Path=20
> SHOULD NOT be used unless none of the TLVs specifies a feasible tunnel."

I think that the above will technically work.

*However* it would be a pity to *not* have the very useful clear-text expla=
nation of the reason for the 'MPLS' type (what you propose to add above in =
the overlay draft) in  draft-ietf-idr-tunnel-encaps-00... why provide the s=
mooth explanation for only one of the specs to which this 'MPLS' type appli=
es ?

>
> We hope this is satisfactory.

Close, but not quite there yet :)

Best,

-Thomas




>
>> -----Original Message-----
>> From: Thomas Morin [mailto:thomas.morin@orange.com]
>> Sent: Thursday, November 12, 2015 10:08 AM
>> To: John E Drake; bess@ietf.org
>> Cc: Eric Rosen
>> Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>>
>> Hi John,
>>
>> 2015-11-12, John E Drake:
>>>
>>> Why do you think it should be documented in Eric's draft rather than=20
>>> in the
>> EVPN Overlay draft?
>>
>> The issue applies beyond the context of E-VPN overlay specs, and=20
>> exist in any context where different kinds of MPLS(/x) encaps can be=20
>> mixed (E-VPN non-overlay, IP VPNs), which is addressed by Eric's draft.
>>
>> Best,
>>
>> -Thomas
>


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From: Lucy yong <lucy.yong@huawei.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, Haoweiguo <haoweiguo@huawei.com>
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From: Lucy yong <lucy.yong@huawei.com>
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To: Lucy yong <lucy.yong@huawei.com>, Haoweiguo <haoweiguo@huawei.com>
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From: Gunter Van De Velde <guntervandeveldecc@icloud.com>
To: Lucy yong <lucy.yong@huawei.com>
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Date: Fri, 13 Nov 2015 20:46:00 +0100
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Cc: John E Drake <jdrake@juniper.net>, thomas.morin@orange.com, "Ali Sajassi \(sajassi\)" <sajassi@cisco.com>, bess@ietf.org, IDR <idr@ietf.org>
Subject: Re: [bess] [Idr] One question about 'draft-ietf-bess-evpn-overlay-02' and draft-ietf-idr-tunnel-encaps-00
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Hi Lucy,

Did you take time to read
https://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-02

Its used pretty intense by DC orchestration platforms nowadays. Section 5.1
provides more insight.
Brgds, G/

Sent using CloudMagic Email
[https://cloudmagic.com/k/d/mailapp?ct=pa&cv=8.0.55&pv=6.0&source=email_footer_2] 
On Fri, Nov 13, 2015 at 7:12 PM, Lucy yong < lucy.yong@huawei.com 
[lucy.yong@huawei.com] > wrote:
Hi John,

Since the tunnel encap draft goes with encap tunnel attribute and there was 
no
deployment of RFC5512, IMO, we should deprecate encapsulation extended 
community
to keep a consistent method.

Thus, should the overlay draft states if BGP tunnel encapsulate attribute 
is not
present, ....

Regards,
Lucy

-----Original Message-----
 From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of 
thomas.morin@orange.com
Sent: Friday, November 13, 2015 10:46 AM
To: John E Drake; bess@ietf.org
Cc: IDR; Ali Sajassi (sajassi); Eric Rosen
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02' 
and
draft-ietf-idr-tunnel-encaps-00

John,

(Cc'ing IDR.)

2015-11-13, John E Drake:
 >
 > I spoke with Eric and Ali and we would like to change both the overlay
 > draft and the tunnel encaps drafts as follows.
 >
 > For the overlay draft, replace this text in section 5.1.3:
 >
 > "If the BGP Encapsulation extended community is not present, then
 > thedefault MPLS encapsulation or a statically configured encapsulation
 > is
 > assumed."
 >
 > With the following:
 >
 > "Note that the MPLS encapsulation tunnel type is needed in order to
 > distinguish between an advertising node that only supports non-MPLS
 > encapsulations and one that supports MPLS and non-MPLS encapsulations.
 > An advertising node that only supports MPLS encapsulation does not
 > need to advertise any encapsulation tunnel types; i.e., if the BGP
 > Encapsulation extended community is not present, then either MPLS
 > encapsulation or a statically configured encapsulation is assumed."

Having more text to explain things in the overlay draft does not hurt.


 >
 > For the tunnel encaps draft, replace this text in section 5:
 >
 > "If the Tunnel Encapsulation attribute contains several TLVs (i.e.,
 > ifit specifies several tunnels), router R may choose any one of those
 > tunnels, based upon local policy. If any of tunnels' TLVs contain the > 
Color
sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512], the
 > choice of tunnel may be influenced by these sub-TLVs."
 >
 > With the following:
 >
 > "If the Tunnel Encapsulation attribute contains several TLVs (i.e.,
 > ifit specifies several tunnels), router R may choose any one of those
 > tunnels, based upon local policy. If any of tunnels' TLVs contain the
 > Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512],
 > the choice of tunnel may be influenced by these sub-TLVs. Note that if
 > none of the TLVs specifies the MPLS tunnel type, a Label Switched Path
 > SHOULD NOT be used unless none of the TLVs specifies a feasible tunnel."

I think that the above will technically work.

*However* it would be a pity to *not* have the very useful clear-text
explanation of the reason for the 'MPLS' type (what you propose to add 
above in
the overlay draft) in draft-ietf-idr-tunnel-encaps-00... why provide the 
smooth
explanation for only one of the specs to which this 'MPLS' type applies ?

 >
 > We hope this is satisfactory.

Close, but not quite there yet :)

Best,

-Thomas




 >
 >> -----Original Message-----
 >> From: Thomas Morin [mailto:thomas.morin@orange.com]
 >> Sent: Thursday, November 12, 2015 10:08 AM
 >> To: John E Drake; bess@ietf.org
 >> Cc: Eric Rosen
 >> Subject: Re: [bess] One question about 
'draft-ietf-bess-evpn-overlay-02'
 >>
 >> Hi John,
 >>
 >> 2015-11-12, John E Drake:
 >>>
 >>> Why do you think it should be documented in Eric's draft rather than
 >>> in the
 >> EVPN Overlay draft?
 >>
 >> The issue applies beyond the context of E-VPN overlay specs, and
 >> exist in any context where different kinds of MPLS(/x) encaps can be
 >> mixed (E-VPN non-overlay, IP VPNs), which is addressed by Eric's draft.
 >>
 >> Best,
 >>
 >> -Thomas
 >



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------sinikael-?=_1-14474445522690.24223728221841156
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<p dir="ltr">Hi Lucy,</p>
<p dir="ltr">Did you take time to read <br>
https://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-02</p>
<div id='cm_signature'> Its used pretty intense by DC orchestration 
platforms nowadays. Section 5.1 provides more 
insight.<div><br></div><div>Brgds,<div>G/<br><br>Sent using <a 
href="https://cloudmagic.com/k/d/mailapp?ct=pa&amp;cv=8.0.55&amp;pv=6.0&amp;source=email_footer_2">CloudMagic 
Email</a> </div></div></div><div class="cm_quote" style=" color: 
#787878">On Fri, Nov 13, 2015 at 7:12 PM, Lucy yong &lt;<a 
href="mailto:lucy.yong@huawei.com">lucy.yong@huawei.com</a>&gt; 
wrote:</div><br><div id="oldcontent" style="background: rgb(255, 255, 
255);"><blockquote style=""><p dir="ltr">Hi John,<br>
<br>
Since the tunnel encap draft goes with encap tunnel attribute and there was 
no deployment of RFC5512, IMO, we should deprecate encapsulation extended 
community to keep a consistent method. <br>
<br>
Thus, should the overlay draft states if BGP tunnel encapsulate attribute 
is not present, ....<br>
<br>
Regards,<br>
Lucy <br>
<br>
-----Original Message-----<br>
 From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of 
thomas.morin@orange.com<br>
Sent: Friday, November 13, 2015 10:46 AM<br>
To: John E Drake; bess@ietf.org<br>
Cc: IDR; Ali Sajassi (sajassi); Eric Rosen<br>
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02' 
and draft-ietf-idr-tunnel-encaps-00<br>
<br>
John,<br>
<br>
(Cc'ing IDR.)<br>
<br>
2015-11-13, John E Drake:<br>
&gt;<br>
&gt; I spoke with Eric and Ali and we would like to change both the 
overlay&nbsp; <br>
&gt; draft and the tunnel encaps drafts as follows.<br>
&gt;<br>
&gt; For the overlay draft, replace this text in section 5.1.3:<br>
&gt;<br>
&gt; "If the BGP Encapsulation extended community is not present, then <br>
&gt; thedefault MPLS encapsulation or a statically configured encapsulation 
<br>
&gt; is<br>
  &gt; assumed."<br>
&gt;<br>
&gt; With the following:<br>
&gt;<br>
&gt; "Note that the MPLS encapsulation tunnel type is needed in order to <br>
&gt; distinguish between an advertising node that only supports non-MPLS <br>
&gt; encapsulations and one that supports MPLS and non-MPLS encapsulations. 
<br>
&gt; An advertising node that only supports MPLS encapsulation does not <br>
&gt; need to advertise any encapsulation tunnel types; i.e., if the BGP <br>
&gt; Encapsulation extended community is not present, then either MPLS <br>
&gt; encapsulation or a statically configured encapsulation is assumed."<br>
<br>
Having more text to explain things in the overlay draft does not hurt.<br>
<br>
<br>
&gt;<br>
&gt; For the tunnel encaps draft, replace this text in section 5:<br>
&gt;<br>
&gt; "If the Tunnel Encapsulation attribute contains several TLVs (i.e., <br>
&gt; ifit specifies several tunnels), router R may choose any one of those<br>
  &gt; tunnels, based upon local policy. If any of tunnels' TLVs contain 
the&nbsp; &gt; Color sub-TLV and/or the Protocol Type sub-TLV defined in 
[RFC5512], the<br>
&gt; choice of tunnel may be influenced by these sub-TLVs."<br>
&gt;<br>
&gt; With the following:<br>
&gt;<br>
&gt; "If the Tunnel Encapsulation attribute contains several TLVs (i.e., <br>
&gt; ifit specifies several tunnels), router R may choose any one of those <br>
&gt; tunnels, based upon local policy. If any of tunnels' TLVs contain the <br>
&gt; Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512], <br>
&gt; the choice of tunnel may be influenced by these sub-TLVs. Note that if 
<br>
&gt; none of the TLVs specifies the MPLS tunnel type, a Label Switched Path 
<br>
&gt; SHOULD NOT be used unless none of the TLVs specifies a feasible 
tunnel."<br>
<br>
I think that the above will technically work.<br>
<br>
*However* it would be a pity to *not* have the very useful clear-text 
explanation of the reason for the 'MPLS' type (what you propose to add 
above in the overlay draft) in&nbsp; draft-ietf-idr-tunnel-encaps-00... why 
provide the smooth explanation for only one of the specs to which this 
'MPLS' type applies ?<br>
<br>
&gt;<br>
&gt; We hope this is satisfactory.<br>
<br>
Close, but not quite there yet :)<br>
<br>
Best,<br>
<br>
-Thomas<br>
<br>
<br>
<br>
<br>
&gt;<br>
&gt;&gt; -----Original Message-----<br>
&gt;&gt; From: Thomas Morin [mailto:thomas.morin@orange.com]<br>
&gt;&gt; Sent: Thursday, November 12, 2015 10:08 AM<br>
&gt;&gt; To: John E Drake; bess@ietf.org<br>
&gt;&gt; Cc: Eric Rosen<br>
&gt;&gt; Subject: Re: [bess] One question about 
'draft-ietf-bess-evpn-overlay-02'<br>
&gt;&gt;<br>
&gt;&gt; Hi John,<br>
&gt;&gt;<br>
&gt;&gt; 2015-11-12, John E Drake:<br>
&gt;&gt;&gt;<br>
&gt;&gt;&gt; Why do you think it should be documented in Eric's draft 
rather than <br>
&gt;&gt;&gt; in the<br>
&gt;&gt; EVPN Overlay draft?<br>
&gt;&gt;<br>
&gt;&gt; The issue applies beyond the context of E-VPN overlay specs, and <br>
&gt;&gt; exist in any context where different kinds of MPLS(/x) encaps can 
be <br>
&gt;&gt; mixed (E-VPN non-overlay, IP VPNs), which is addressed by Eric's 
draft.<br>
&gt;&gt;<br>
&gt;&gt; Best,<br>
&gt;&gt;<br>
&gt;&gt; -Thomas<br>
&gt;<br>
<br>
<br>
_________________________________________________________________________________________________________________________
<br>
<br>
Ce message et ses pieces jointes peuvent contenir des informations 
confidentielles ou privilegiees et ne doivent donc pas etre diffuses, 
exploites ou copies sans autorisation. Si vous avez recu ce message par 
erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les 
pieces jointes. Les messages electroniques etant susceptibles d'alteration, 
Orange decline toute responsabilite si ce message a ete altere, deforme ou 
falsifie. Merci.<br>
<br>
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information that may be protected by law; they should not be distributed, 
used or copied without authorisation.<br>
If you have received this email in error, please notify the sender and 
delete this message and its attachments.<br>
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modified, changed or falsified.<br>
Thank you.<br>
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_______________________________________________<br>
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</p>
</blockquote></div>
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From: Lucy yong <lucy.yong@huawei.com>
To: Gunter Van De Velde <guntervandeveldecc@icloud.com>
Thread-Topic: [Idr] [bess] One question about 'draft-ietf-bess-evpn-overlay-02' and draft-ietf-idr-tunnel-encaps-00
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Subject: Re: [bess] [Idr] One question about 'draft-ietf-bess-evpn-overlay-02' and draft-ietf-idr-tunnel-encaps-00
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Hi Gunter,

Thank you to point to the right section. This overlay draft suggests to use=
 Encapsulation extended community to indicate the type of data plane encaps=
ulation to be used for all EVC routes. But the tunnel encap draft proposes =
to use tunnel encapsulation attribute + sub-TLVs to indicate the type of da=
ta plane encapsulation to be used for a prefix. Why do we want to have two =
solutions for the same space?

Since this overlay draft is not RFC yet, it is good for the community to ma=
ke a decision on it, which keeps simple for the implementation. It is not h=
ard to modify the draft to use tunnel encapsulation attribute indicating th=
e type of data plane encapsulation for all EVC routes.

Regards,
Lucy

From: Gunter Van De Velde [mailto:guntervandeveldecc@icloud.com]
Sent: Friday, November 13, 2015 1:46 PM
To: Lucy yong
Cc: thomas.morin@orange.com; John E Drake; bess@ietf.org; IDR; Ali Sajassi =
(sajassi)
Subject: Re: [Idr] [bess] One question about 'draft-ietf-bess-evpn-overlay-=
02' and draft-ietf-idr-tunnel-encaps-00


Hi Lucy,

Did you take time to read
https://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-02
Its used pretty intense by DC orchestration platforms nowadays. Section 5.1=
 provides more insight.

Brgds,
G/

Sent using CloudMagic Email<https://cloudmagic.com/k/d/mailapp?ct=3Dpa&cv=
=3D8.0.55&pv=3D6.0&source=3Demail_footer_2>
On Fri, Nov 13, 2015 at 7:12 PM, Lucy yong <lucy.yong@huawei.com<mailto:luc=
y.yong@huawei.com>> wrote:


Hi John,

Since the tunnel encap draft goes with encap tunnel attribute and there was=
 no deployment of RFC5512, IMO, we should deprecate encapsulation extended =
community to keep a consistent method.

Thus, should the overlay draft states if BGP tunnel encapsulate attribute i=
s not present, ....

Regards,
Lucy

-----Original Message-----
From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of thomas.morin@orange.=
com<mailto:thomas.morin@orange.com>
Sent: Friday, November 13, 2015 10:46 AM
To: John E Drake; bess@ietf.org<mailto:bess@ietf.org>
Cc: IDR; Ali Sajassi (sajassi); Eric Rosen
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02' an=
d draft-ietf-idr-tunnel-encaps-00

John,

(Cc'ing IDR.)

2015-11-13, John E Drake:
>
> I spoke with Eric and Ali and we would like to change both the overlay
> draft and the tunnel encaps drafts as follows.
>
> For the overlay draft, replace this text in section 5.1.3:
>
> "If the BGP Encapsulation extended community is not present, then
> thedefault MPLS encapsulation or a statically configured encapsulation
> is
> assumed."
>
> With the following:
>
> "Note that the MPLS encapsulation tunnel type is needed in order to
> distinguish between an advertising node that only supports non-MPLS
> encapsulations and one that supports MPLS and non-MPLS encapsulations.
> An advertising node that only supports MPLS encapsulation does not
> need to advertise any encapsulation tunnel types; i.e., if the BGP
> Encapsulation extended community is not present, then either MPLS
> encapsulation or a statically configured encapsulation is assumed."

Having more text to explain things in the overlay draft does not hurt.


>
> For the tunnel encaps draft, replace this text in section 5:
>
> "If the Tunnel Encapsulation attribute contains several TLVs (i.e.,
> ifit specifies several tunnels), router R may choose any one of those
> tunnels, based upon local policy. If any of tunnels' TLVs contain the  > =
Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512], the
> choice of tunnel may be influenced by these sub-TLVs."
>
> With the following:
>
> "If the Tunnel Encapsulation attribute contains several TLVs (i.e.,
> ifit specifies several tunnels), router R may choose any one of those
> tunnels, based upon local policy. If any of tunnels' TLVs contain the
> Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512],
> the choice of tunnel may be influenced by these sub-TLVs. Note that if
> none of the TLVs specifies the MPLS tunnel type, a Label Switched Path
> SHOULD NOT be used unless none of the TLVs specifies a feasible tunnel."

I think that the above will technically work.

*However* it would be a pity to *not* have the very useful clear-text expla=
nation of the reason for the 'MPLS' type (what you propose to add above in =
the overlay draft) in  draft-ietf-idr-tunnel-encaps-00... why provide the s=
mooth explanation for only one of the specs to which this 'MPLS' type appli=
es ?

>
> We hope this is satisfactory.

Close, but not quite there yet :)

Best,

-Thomas




>
>> -----Original Message-----
>> From: Thomas Morin [mailto:thomas.morin@orange.com]
>> Sent: Thursday, November 12, 2015 10:08 AM
>> To: John E Drake; bess@ietf.org<mailto:bess@ietf.org>
>> Cc: Eric Rosen
>> Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>>
>> Hi John,
>>
>> 2015-11-12, John E Drake:
>>>
>>> Why do you think it should be documented in Eric's draft rather than
>>> in the
>> EVPN Overlay draft?
>>
>> The issue applies beyond the context of E-VPN overlay specs, and
>> exist in any context where different kinds of MPLS(/x) encaps can be
>> mixed (E-VPN non-overlay, IP VPNs), which is addressed by Eric's draft.
>>
>> Best,
>>
>> -Thomas
>


___________________________________________________________________________=
______________________________________________

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ute responsabilite si ce message a ete altere, deforme ou falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Hi Gunter,<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Thank you to point to the=
 right section. This overlay draft suggests to use Encapsulation extended c=
ommunity to indicate the type of data plane encapsulation
 to be used for all EVC routes. But the tunnel encap draft proposes to use =
tunnel encapsulation attribute &#43; sub-TLVs to indicate the type of data =
plane encapsulation to be used for a prefix. Why do we want to have two sol=
utions for the same space?
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Since this overlay draft =
is not RFC yet, it is good for the community to make a decision on it, whic=
h keeps simple for the implementation. It is not hard to
 modify the draft to use tunnel encapsulation attribute indicating the type=
 of data plane encapsulation for all EVC routes.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Regards,<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Lucy<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Gunter V=
an De Velde [mailto:guntervandeveldecc@icloud.com]
<br>
<b>Sent:</b> Friday, November 13, 2015 1:46 PM<br>
<b>To:</b> Lucy yong<br>
<b>Cc:</b> thomas.morin@orange.com; John E Drake; bess@ietf.org; IDR; Ali S=
ajassi (sajassi)<br>
<b>Subject:</b> Re: [Idr] [bess] One question about 'draft-ietf-bess-evpn-o=
verlay-02' and draft-ietf-idr-tunnel-encaps-00<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p>Hi Lucy,<o:p></o:p></p>
<p>Did you take time to read <br>
<a href=3D"https://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-02">htt=
ps://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-02</a><o:p></o:p></p>
<div id=3D"cm_signature">
<p class=3D"MsoNormal">Its used pretty intense by DC orchestration platform=
s nowadays. Section 5.1 provides more insight.<o:p></o:p></p>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Brgds,<o:p></o:p></p>
<div>
<p class=3D"MsoNormal">G/<br>
<br>
Sent using <a href=3D"https://cloudmagic.com/k/d/mailapp?ct=3Dpa&amp;cv=3D8=
.0.55&amp;pv=3D6.0&amp;source=3Demail_footer_2">
CloudMagic Email</a> <o:p></o:p></p>
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<div>
<p class=3D"MsoNormal"><span style=3D"color:#787878">On Fri, Nov 13, 2015 a=
t 7:12 PM, Lucy yong &lt;<a href=3D"mailto:lucy.yong@huawei.com">lucy.yong@=
huawei.com</a>&gt; wrote:<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div id=3D"oldcontent">
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p>Hi John,<br>
<br>
Since the tunnel encap draft goes with encap tunnel attribute and there was=
 no deployment of RFC5512, IMO, we should deprecate encapsulation extended =
community to keep a consistent method.
<br>
<br>
Thus, should the overlay draft states if BGP tunnel encapsulate attribute i=
s not present, ....<br>
<br>
Regards,<br>
Lucy <br>
<br>
-----Original Message-----<br>
From: BESS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ie=
tf.org</a>] On Behalf Of
<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</a><br>
Sent: Friday, November 13, 2015 10:46 AM<br>
To: John E Drake; <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
Cc: IDR; Ali Sajassi (sajassi); Eric Rosen<br>
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02' an=
d draft-ietf-idr-tunnel-encaps-00<br>
<br>
John,<br>
<br>
(Cc'ing IDR.)<br>
<br>
2015-11-13, John E Drake:<br>
&gt;<br>
&gt; I spoke with Eric and Ali and we would like to change both the overlay=
&nbsp; <br>
&gt; draft and the tunnel encaps drafts as follows.<br>
&gt;<br>
&gt; For the overlay draft, replace this text in section 5.1.3:<br>
&gt;<br>
&gt; &quot;If the BGP Encapsulation extended community is not present, then=
 <br>
&gt; thedefault MPLS encapsulation or a statically configured encapsulation=
 <br>
&gt; is<br>
&gt; assumed.&quot;<br>
&gt;<br>
&gt; With the following:<br>
&gt;<br>
&gt; &quot;Note that the MPLS encapsulation tunnel type is needed in order =
to <br>
&gt; distinguish between an advertising node that only supports non-MPLS <b=
r>
&gt; encapsulations and one that supports MPLS and non-MPLS encapsulations.=
 <br>
&gt; An advertising node that only supports MPLS encapsulation does not <br=
>
&gt; need to advertise any encapsulation tunnel types; i.e., if the BGP <br=
>
&gt; Encapsulation extended community is not present, then either MPLS <br>
&gt; encapsulation or a statically configured encapsulation is assumed.&quo=
t;<br>
<br>
Having more text to explain things in the overlay draft does not hurt.<br>
<br>
<br>
&gt;<br>
&gt; For the tunnel encaps draft, replace this text in section 5:<br>
&gt;<br>
&gt; &quot;If the Tunnel Encapsulation attribute contains several TLVs (i.e=
., <br>
&gt; ifit specifies several tunnels), router R may choose any one of those<=
br>
&gt; tunnels, based upon local policy. If any of tunnels' TLVs contain the&=
nbsp; &gt; Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC55=
12], the<br>
&gt; choice of tunnel may be influenced by these sub-TLVs.&quot;<br>
&gt;<br>
&gt; With the following:<br>
&gt;<br>
&gt; &quot;If the Tunnel Encapsulation attribute contains several TLVs (i.e=
., <br>
&gt; ifit specifies several tunnels), router R may choose any one of those =
<br>
&gt; tunnels, based upon local policy. If any of tunnels' TLVs contain the =
<br>
&gt; Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512], <=
br>
&gt; the choice of tunnel may be influenced by these sub-TLVs. Note that if=
 <br>
&gt; none of the TLVs specifies the MPLS tunnel type, a Label Switched Path=
 <br>
&gt; SHOULD NOT be used unless none of the TLVs specifies a feasible tunnel=
.&quot;<br>
<br>
I think that the above will technically work.<br>
<br>
*However* it would be a pity to *not* have the very useful clear-text expla=
nation of the reason for the 'MPLS' type (what you propose to add above in =
the overlay draft) in&nbsp; draft-ietf-idr-tunnel-encaps-00... why provide =
the smooth explanation for only one of
 the specs to which this 'MPLS' type applies ?<br>
<br>
&gt;<br>
&gt; We hope this is satisfactory.<br>
<br>
Close, but not quite there yet :)<br>
<br>
Best,<br>
<br>
-Thomas<br>
<br>
<br>
<br>
<br>
&gt;<br>
&gt;&gt; -----Original Message-----<br>
&gt;&gt; From: Thomas Morin [<a href=3D"mailto:thomas.morin@orange.com">mai=
lto:thomas.morin@orange.com</a>]<br>
&gt;&gt; Sent: Thursday, November 12, 2015 10:08 AM<br>
&gt;&gt; To: John E Drake; <a href=3D"mailto:bess@ietf.org">bess@ietf.org</=
a><br>
&gt;&gt; Cc: Eric Rosen<br>
&gt;&gt; Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overl=
ay-02'<br>
&gt;&gt;<br>
&gt;&gt; Hi John,<br>
&gt;&gt;<br>
&gt;&gt; 2015-11-12, John E Drake:<br>
&gt;&gt;&gt;<br>
&gt;&gt;&gt; Why do you think it should be documented in Eric's draft rathe=
r than <br>
&gt;&gt;&gt; in the<br>
&gt;&gt; EVPN Overlay draft?<br>
&gt;&gt;<br>
&gt;&gt; The issue applies beyond the context of E-VPN overlay specs, and <=
br>
&gt;&gt; exist in any context where different kinds of MPLS(/x) encaps can =
be <br>
&gt;&gt; mixed (E-VPN non-overlay, IP VPNs), which is addressed by Eric's d=
raft.<br>
&gt;&gt;<br>
&gt;&gt; Best,<br>
&gt;&gt;<br>
&gt;&gt; -Thomas<br>
&gt;<br>
<br>
<br>
___________________________________________________________________________=
______________________________________________
<br>
<br>
Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou =
copies sans autorisation. Si vous avez recu ce message par erreur, veuillez=
 le signaler a l'expediteur et le
 detruire ainsi que les pieces jointes. Les messages electroniques etant su=
sceptibles d'alteration, Orange decline toute responsabilite si ce message =
a ete altere, deforme ou falsifie. Merci.<br>
<br>
This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law; they should not be distributed, used=
 or copied without authorisation.<br>
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.<br>
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.<br>
Thank you.<br>
<br>
_______________________________________________<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess">https://www.ietf.org=
/mailman/listinfo/bess</a><br>
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_______________________________________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr">https://www.ietf.org/=
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From: <thomas.morin@orange.com>
To: Gunter Van De Velde <guntervandeveldecc@icloud.com>, Lucy yong <lucy.yong@huawei.com>
Thread-Topic: [Idr] [bess] One question about 'draft-ietf-bess-evpn-overlay-02' and draft-ietf-idr-tunnel-encaps-00
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Lucy,

The tunnel encap also describe how to use the extended community, in sectio=
n 6.

Best,

-Thomas


---- Lucy yong a =E9crit ----

Hi Gunter,

Thank you to point to the right section. This overlay draft suggests to use=
 Encapsulation extended community to indicate the type of data plane encaps=
ulation to be used for all EVC routes. But the tunnel encap draft proposes =
to use tunnel encapsulation attribute + sub-TLVs to indicate the type of da=
ta plane encapsulation to be used for a prefix. Why do we want to have two =
solutions for the same space?

Since this overlay draft is not RFC yet, it is good for the community to ma=
ke a decision on it, which keeps simple for the implementation. It is not h=
ard to modify the draft to use tunnel encapsulation attribute indicating th=
e type of data plane encapsulation for all EVC routes.

Regards,
Lucy

From: Gunter Van De Velde [mailto:guntervandeveldecc@icloud.com]
Sent: Friday, November 13, 2015 1:46 PM
To: Lucy yong
Cc: thomas.morin@orange.com; John E Drake; bess@ietf.org; IDR; Ali Sajassi =
(sajassi)
Subject: Re: [Idr] [bess] One question about 'draft-ietf-bess-evpn-overlay-=
02' and draft-ietf-idr-tunnel-encaps-00


Hi Lucy,

Did you take time to read
https://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-02
Its used pretty intense by DC orchestration platforms nowadays. Section 5.1=
 provides more insight.

Brgds,
G/

Sent using CloudMagic Email<https://cloudmagic.com/k/d/mailapp?ct=3Dpa&cv=
=3D8.0.55&pv=3D6.0&source=3Demail_footer_2>
On Fri, Nov 13, 2015 at 7:12 PM, Lucy yong <lucy.yong@huawei.com<mailto:luc=
y.yong@huawei.com>> wrote:


Hi John,

Since the tunnel encap draft goes with encap tunnel attribute and there was=
 no deployment of RFC5512, IMO, we should deprecate encapsulation extended =
community to keep a consistent method.

Thus, should the overlay draft states if BGP tunnel encapsulate attribute i=
s not present, ....

Regards,
Lucy

-----Original Message-----
From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of thomas.morin@orange.=
com<mailto:thomas.morin@orange.com>
Sent: Friday, November 13, 2015 10:46 AM
To: John E Drake; bess@ietf.org<mailto:bess@ietf.org>
Cc: IDR; Ali Sajassi (sajassi); Eric Rosen
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02' an=
d draft-ietf-idr-tunnel-encaps-00

John,

(Cc'ing IDR.)

2015-11-13, John E Drake:
>
> I spoke with Eric and Ali and we would like to change both the overlay
> draft and the tunnel encaps drafts as follows.
>
> For the overlay draft, replace this text in section 5.1.3:
>
> "If the BGP Encapsulation extended community is not present, then
> thedefault MPLS encapsulation or a statically configured encapsulation
> is
> assumed."
>
> With the following:
>
> "Note that the MPLS encapsulation tunnel type is needed in order to
> distinguish between an advertising node that only supports non-MPLS
> encapsulations and one that supports MPLS and non-MPLS encapsulations.
> An advertising node that only supports MPLS encapsulation does not
> need to advertise any encapsulation tunnel types; i.e., if the BGP
> Encapsulation extended community is not present, then either MPLS
> encapsulation or a statically configured encapsulation is assumed."

Having more text to explain things in the overlay draft does not hurt.


>
> For the tunnel encaps draft, replace this text in section 5:
>
> "If the Tunnel Encapsulation attribute contains several TLVs (i.e.,
> ifit specifies several tunnels), router R may choose any one of those
> tunnels, based upon local policy. If any of tunnels' TLVs contain the  > =
Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512], the
> choice of tunnel may be influenced by these sub-TLVs."
>
> With the following:
>
> "If the Tunnel Encapsulation attribute contains several TLVs (i.e.,
> ifit specifies several tunnels), router R may choose any one of those
> tunnels, based upon local policy. If any of tunnels' TLVs contain the
> Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512],
> the choice of tunnel may be influenced by these sub-TLVs. Note that if
> none of the TLVs specifies the MPLS tunnel type, a Label Switched Path
> SHOULD NOT be used unless none of the TLVs specifies a feasible tunnel."

I think that the above will technically work.

*However* it would be a pity to *not* have the very useful clear-text expla=
nation of the reason for the 'MPLS' type (what you propose to add above in =
the overlay draft) in  draft-ietf-idr-tunnel-encaps-00... why provide the s=
mooth explanation for only one of the specs to which this 'MPLS' type appli=
es ?

>
> We hope this is satisfactory.

Close, but not quite there yet :)

Best,

-Thomas




>
>> -----Original Message-----
>> From: Thomas Morin [mailto:thomas.morin@orange.com]
>> Sent: Thursday, November 12, 2015 10:08 AM
>> To: John E Drake; bess@ietf.org<mailto:bess@ietf.org>
>> Cc: Eric Rosen
>> Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>>
>> Hi John,
>>
>> 2015-11-12, John E Drake:
>>>
>>> Why do you think it should be documented in Eric's draft rather than
>>> in the
>> EVPN Overlay draft?
>>
>> The issue applies beyond the context of E-VPN overlay specs, and
>> exist in any context where different kinds of MPLS(/x) encaps can be
>> mixed (E-VPN non-overlay, IP VPNs), which is addressed by Eric's draft.
>>
>> Best,
>>
>> -Thomas
>


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<p dir=3D"ltr">Lucy, </p>
<p dir=3D"ltr">The tunnel encap also describe how to use the extended commu=
nity, in section 6.</p>
<p dir=3D"ltr">Best,</p>
<p dir=3D"ltr">-Thomas<br>
</p>
<br>
<br>
---- Lucy yong a =E9crit ----<br>
<br>
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">Hi Gunter,</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">Thank you to point to t=
he right section. This overlay draft suggests to use Encapsulation extended=
 community to indicate the type of data plane encapsulation
 to be used for all EVC routes. But the tunnel encap draft proposes to use =
tunnel encapsulation attribute &#43; sub-TLVs to indicate the type of data =
plane encapsulation to be used for a prefix. Why do we want to have two sol=
utions for the same space?
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">Since this overlay draf=
t is not RFC yet, it is good for the community to make a decision on it, wh=
ich keeps simple for the implementation. It is not hard
 to modify the draft to use tunnel encapsulation attribute indicating the t=
ype of data plane encapsulation for all EVC routes.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">Regards,</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">Lucy</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">&nbsp;</span></p>
<div style=3D"border:none; border-top:solid #B5C4DF 1.0pt; padding:3.0pt 0i=
n 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt; font-family:&quo=
t;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:10.0pt; font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Gunter=
 Van De Velde [mailto:guntervandeveldecc@icloud.com]
<br>
<b>Sent:</b> Friday, November 13, 2015 1:46 PM<br>
<b>To:</b> Lucy yong<br>
<b>Cc:</b> thomas.morin@orange.com; John E Drake; bess@ietf.org; IDR; Ali S=
ajassi (sajassi)<br>
<b>Subject:</b> Re: [Idr] [bess] One question about 'draft-ietf-bess-evpn-o=
verlay-02' and draft-ietf-idr-tunnel-encaps-00</span></p>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<p>Hi Lucy,</p>
<p>Did you take time to read <br>
<a href=3D"https://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-02">htt=
ps://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-02</a></p>
<div id=3D"cm_signature">
<p class=3D"MsoNormal">Its used pretty intense by DC orchestration platform=
s nowadays. Section 5.1 provides more insight.</p>
<div>
<p class=3D"MsoNormal">&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal">Brgds,</p>
<div>
<p class=3D"MsoNormal">G/<br>
<br>
Sent using <a href=3D"https://cloudmagic.com/k/d/mailapp?ct=3Dpa&amp;cv=3D8=
.0.55&amp;pv=3D6.0&amp;source=3Demail_footer_2">
CloudMagic Email</a> </p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:#787878">On Fri, Nov 13, 2015 a=
t 7:12 PM, Lucy yong &lt;<a href=3D"mailto:lucy.yong@huawei.com">lucy.yong@=
huawei.com</a>&gt; wrote:</span></p>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<div id=3D"oldcontent">
<blockquote style=3D"margin-top:5.0pt; margin-bottom:5.0pt">
<p>Hi John,<br>
<br>
Since the tunnel encap draft goes with encap tunnel attribute and there was=
 no deployment of RFC5512, IMO, we should deprecate encapsulation extended =
community to keep a consistent method.
<br>
<br>
Thus, should the overlay draft states if BGP tunnel encapsulate attribute i=
s not present, ....<br>
<br>
Regards,<br>
Lucy <br>
<br>
-----Original Message-----<br>
From: BESS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ie=
tf.org</a>] On Behalf Of
<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</a><br>
Sent: Friday, November 13, 2015 10:46 AM<br>
To: John E Drake; <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
Cc: IDR; Ali Sajassi (sajassi); Eric Rosen<br>
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02' an=
d draft-ietf-idr-tunnel-encaps-00<br>
<br>
John,<br>
<br>
(Cc'ing IDR.)<br>
<br>
2015-11-13, John E Drake:<br>
&gt;<br>
&gt; I spoke with Eric and Ali and we would like to change both the overlay=
&nbsp; <br>
&gt; draft and the tunnel encaps drafts as follows.<br>
&gt;<br>
&gt; For the overlay draft, replace this text in section 5.1.3:<br>
&gt;<br>
&gt; &quot;If the BGP Encapsulation extended community is not present, then=
 <br>
&gt; thedefault MPLS encapsulation or a statically configured encapsulation=
 <br>
&gt; is<br>
&gt; assumed.&quot;<br>
&gt;<br>
&gt; With the following:<br>
&gt;<br>
&gt; &quot;Note that the MPLS encapsulation tunnel type is needed in order =
to <br>
&gt; distinguish between an advertising node that only supports non-MPLS <b=
r>
&gt; encapsulations and one that supports MPLS and non-MPLS encapsulations.=
 <br>
&gt; An advertising node that only supports MPLS encapsulation does not <br>
&gt; need to advertise any encapsulation tunnel types; i.e., if the BGP <br>
&gt; Encapsulation extended community is not present, then either MPLS <br>
&gt; encapsulation or a statically configured encapsulation is assumed.&quo=
t;<br>
<br>
Having more text to explain things in the overlay draft does not hurt.<br>
<br>
<br>
&gt;<br>
&gt; For the tunnel encaps draft, replace this text in section 5:<br>
&gt;<br>
&gt; &quot;If the Tunnel Encapsulation attribute contains several TLVs (i.e=
., <br>
&gt; ifit specifies several tunnels), router R may choose any one of those<=
br>
&gt; tunnels, based upon local policy. If any of tunnels' TLVs contain the&=
nbsp; &gt; Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC55=
12], the<br>
&gt; choice of tunnel may be influenced by these sub-TLVs.&quot;<br>
&gt;<br>
&gt; With the following:<br>
&gt;<br>
&gt; &quot;If the Tunnel Encapsulation attribute contains several TLVs (i.e=
., <br>
&gt; ifit specifies several tunnels), router R may choose any one of those =
<br>
&gt; tunnels, based upon local policy. If any of tunnels' TLVs contain the =
<br>
&gt; Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512], <=
br>
&gt; the choice of tunnel may be influenced by these sub-TLVs. Note that if=
 <br>
&gt; none of the TLVs specifies the MPLS tunnel type, a Label Switched Path=
 <br>
&gt; SHOULD NOT be used unless none of the TLVs specifies a feasible tunnel=
.&quot;<br>
<br>
I think that the above will technically work.<br>
<br>
*However* it would be a pity to *not* have the very useful clear-text expla=
nation of the reason for the 'MPLS' type (what you propose to add above in =
the overlay draft) in&nbsp; draft-ietf-idr-tunnel-encaps-00... why provide =
the smooth explanation for only one of
 the specs to which this 'MPLS' type applies ?<br>
<br>
&gt;<br>
&gt; We hope this is satisfactory.<br>
<br>
Close, but not quite there yet :)<br>
<br>
Best,<br>
<br>
-Thomas<br>
<br>
<br>
<br>
<br>
&gt;<br>
&gt;&gt; -----Original Message-----<br>
&gt;&gt; From: Thomas Morin [<a href=3D"mailto:thomas.morin@orange.com">mai=
lto:thomas.morin@orange.com</a>]<br>
&gt;&gt; Sent: Thursday, November 12, 2015 10:08 AM<br>
&gt;&gt; To: John E Drake; <a href=3D"mailto:bess@ietf.org">bess@ietf.org</=
a><br>
&gt;&gt; Cc: Eric Rosen<br>
&gt;&gt; Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overl=
ay-02'<br>
&gt;&gt;<br>
&gt;&gt; Hi John,<br>
&gt;&gt;<br>
&gt;&gt; 2015-11-12, John E Drake:<br>
&gt;&gt;&gt;<br>
&gt;&gt;&gt; Why do you think it should be documented in Eric's draft rathe=
r than <br>
&gt;&gt;&gt; in the<br>
&gt;&gt; EVPN Overlay draft?<br>
&gt;&gt;<br>
&gt;&gt; The issue applies beyond the context of E-VPN overlay specs, and <=
br>
&gt;&gt; exist in any context where different kinds of MPLS(/x) encaps can =
be <br>
&gt;&gt; mixed (E-VPN non-overlay, IP VPNs), which is addressed by Eric's d=
raft.<br>
&gt;&gt;<br>
&gt;&gt; Best,<br>
&gt;&gt;<br>
&gt;&gt; -Thomas<br>
&gt;<br>
<br>
<br>
___________________________________________________________________________=
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From: Lucy yong <lucy.yong@huawei.com>
To: "thomas.morin@orange.com" <thomas.morin@orange.com>, Gunter Van De Velde <guntervandeveldecc@icloud.com>
Thread-Topic: [Idr] [bess] One question about 'draft-ietf-bess-evpn-overlay-02' and draft-ietf-idr-tunnel-encaps-00
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Yes, kindly for backward compatibility. Having two ways to do it is a pain =
for the implementation.
Lucy

From: thomas.morin@orange.com [mailto:thomas.morin@orange.com]
Sent: Friday, November 13, 2015 2:19 PM
To: Gunter Van De Velde; Lucy yong
Cc: John E Drake; bess@ietf.org; IDR; Ali Sajassi (sajassi)
Subject: RE: [Idr] [bess] One question about 'draft-ietf-bess-evpn-overlay-=
02' and draft-ietf-idr-tunnel-encaps-00


Lucy,

The tunnel encap also describe how to use the extended community, in sectio=
n 6.

Best,

-Thomas


---- Lucy yong a =E9crit ----
Hi Gunter,

Thank you to point to the right section. This overlay draft suggests to use=
 Encapsulation extended community to indicate the type of data plane encaps=
ulation to be used for all EVC routes. But the tunnel encap draft proposes =
to use tunnel encapsulation attribute + sub-TLVs to indicate the type of da=
ta plane encapsulation to be used for a prefix. Why do we want to have two =
solutions for the same space?

Since this overlay draft is not RFC yet, it is good for the community to ma=
ke a decision on it, which keeps simple for the implementation. It is not h=
ard to modify the draft to use tunnel encapsulation attribute indicating th=
e type of data plane encapsulation for all EVC routes.

Regards,
Lucy

From: Gunter Van De Velde [mailto:guntervandeveldecc@icloud.com]
Sent: Friday, November 13, 2015 1:46 PM
To: Lucy yong
Cc: thomas.morin@orange.com<mailto:thomas.morin@orange.com>; John E Drake; =
bess@ietf.org<mailto:bess@ietf.org>; IDR; Ali Sajassi (sajassi)
Subject: Re: [Idr] [bess] One question about 'draft-ietf-bess-evpn-overlay-=
02' and draft-ietf-idr-tunnel-encaps-00


Hi Lucy,

Did you take time to read
https://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-02
Its used pretty intense by DC orchestration platforms nowadays. Section 5.1=
 provides more insight.

Brgds,
G/

Sent using CloudMagic Email<https://cloudmagic.com/k/d/mailapp?ct=3Dpa&cv=
=3D8.0.55&pv=3D6.0&source=3Demail_footer_2>
On Fri, Nov 13, 2015 at 7:12 PM, Lucy yong <lucy.yong@huawei.com<mailto:luc=
y.yong@huawei.com>> wrote:


Hi John,

Since the tunnel encap draft goes with encap tunnel attribute and there was=
 no deployment of RFC5512, IMO, we should deprecate encapsulation extended =
community to keep a consistent method.

Thus, should the overlay draft states if BGP tunnel encapsulate attribute i=
s not present, ....

Regards,
Lucy

-----Original Message-----
From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of thomas.morin@orange.=
com<mailto:thomas.morin@orange.com>
Sent: Friday, November 13, 2015 10:46 AM
To: John E Drake; bess@ietf.org<mailto:bess@ietf.org>
Cc: IDR; Ali Sajassi (sajassi); Eric Rosen
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02' an=
d draft-ietf-idr-tunnel-encaps-00

John,

(Cc'ing IDR.)

2015-11-13, John E Drake:
>
> I spoke with Eric and Ali and we would like to change both the overlay
> draft and the tunnel encaps drafts as follows.
>
> For the overlay draft, replace this text in section 5.1.3:
>
> "If the BGP Encapsulation extended community is not present, then
> thedefault MPLS encapsulation or a statically configured encapsulation
> is
> assumed."
>
> With the following:
>
> "Note that the MPLS encapsulation tunnel type is needed in order to
> distinguish between an advertising node that only supports non-MPLS
> encapsulations and one that supports MPLS and non-MPLS encapsulations.
> An advertising node that only supports MPLS encapsulation does not
> need to advertise any encapsulation tunnel types; i.e., if the BGP
> Encapsulation extended community is not present, then either MPLS
> encapsulation or a statically configured encapsulation is assumed."

Having more text to explain things in the overlay draft does not hurt.


>
> For the tunnel encaps draft, replace this text in section 5:
>
> "If the Tunnel Encapsulation attribute contains several TLVs (i.e.,
> ifit specifies several tunnels), router R may choose any one of those
> tunnels, based upon local policy. If any of tunnels' TLVs contain the  > =
Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512], the
> choice of tunnel may be influenced by these sub-TLVs."
>
> With the following:
>
> "If the Tunnel Encapsulation attribute contains several TLVs (i.e.,
> ifit specifies several tunnels), router R may choose any one of those
> tunnels, based upon local policy. If any of tunnels' TLVs contain the
> Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512],
> the choice of tunnel may be influenced by these sub-TLVs. Note that if
> none of the TLVs specifies the MPLS tunnel type, a Label Switched Path
> SHOULD NOT be used unless none of the TLVs specifies a feasible tunnel."

I think that the above will technically work.

*However* it would be a pity to *not* have the very useful clear-text expla=
nation of the reason for the 'MPLS' type (what you propose to add above in =
the overlay draft) in  draft-ietf-idr-tunnel-encaps-00... why provide the s=
mooth explanation for only one of the specs to which this 'MPLS' type appli=
es ?

>
> We hope this is satisfactory.

Close, but not quite there yet :)

Best,

-Thomas




>
>> -----Original Message-----
>> From: Thomas Morin [mailto:thomas.morin@orange.com]
>> Sent: Thursday, November 12, 2015 10:08 AM
>> To: John E Drake; bess@ietf.org<mailto:bess@ietf.org>
>> Cc: Eric Rosen
>> Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>>
>> Hi John,
>>
>> 2015-11-12, John E Drake:
>>>
>>> Why do you think it should be documented in Eric's draft rather than
>>> in the
>> EVPN Overlay draft?
>>
>> The issue applies beyond the context of E-VPN overlay specs, and
>> exist in any context where different kinds of MPLS(/x) encaps can be
>> mixed (E-VPN non-overlay, IP VPNs), which is addressed by Eric's draft.
>>
>> Best,
>>
>> -Thomas
>


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yes, kindly for backward =
compatibility. Having two ways to do it is a pain for the implementation.<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Lucy<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> thomas.m=
orin@orange.com [mailto:thomas.morin@orange.com]
<br>
<b>Sent:</b> Friday, November 13, 2015 2:19 PM<br>
<b>To:</b> Gunter Van De Velde; Lucy yong<br>
<b>Cc:</b> John E Drake; bess@ietf.org; IDR; Ali Sajassi (sajassi)<br>
<b>Subject:</b> RE: [Idr] [bess] One question about 'draft-ietf-bess-evpn-o=
verlay-02' and draft-ietf-idr-tunnel-encaps-00<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p>Lucy, <o:p></o:p></p>
<p>The tunnel encap also describe how to use the extended community, in sec=
tion 6.<o:p></o:p></p>
<p>Best,<o:p></o:p></p>
<p>-Thomas<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-f=
amily:&quot;Times New Roman&quot;,&quot;serif&quot;"><br>
<br>
---- Lucy yong a =E9crit ----<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Hi Gunter,</span><o:p></o=
:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><o:p></o:p><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Thank you to point to the=
 right section. This overlay draft suggests to use Encapsulation extended c=
ommunity to indicate the type of data plane encapsulation
 to be used for all EVC routes. But the tunnel encap draft proposes to use =
tunnel encapsulation attribute &#43; sub-TLVs to indicate the type of data =
plane encapsulation to be used for a prefix. Why do we want to have two sol=
utions for the same space?
</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><o:p></o:p><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Since this overlay draft =
is not RFC yet, it is good for the community to make a decision on it, whic=
h keeps simple for the implementation. It is not hard to
 modify the draft to use tunnel encapsulation attribute indicating the type=
 of data plane encapsulation for all EVC routes.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><o:p></o:p><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Regards,</span><o:p></o:p=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Lucy</span><o:p></o:p></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><o:p></o:p><=
/p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Gunter V=
an De Velde [<a href=3D"mailto:guntervandeveldecc@icloud.com">mailto:gunter=
vandeveldecc@icloud.com</a>]
<br>
<b>Sent:</b> Friday, November 13, 2015 1:46 PM<br>
<b>To:</b> Lucy yong<br>
<b>Cc:</b> <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.c=
om</a>; John E Drake;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>; IDR; Ali Sajassi (sajas=
si)<br>
<b>Subject:</b> Re: [Idr] [bess] One question about 'draft-ietf-bess-evpn-o=
verlay-02' and draft-ietf-idr-tunnel-encaps-00</span><o:p></o:p></p>
</div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p>Hi Lucy,<o:p></o:p></p>
<p>Did you take time to read <br>
<a href=3D"https://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-02">htt=
ps://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-02</a><o:p></o:p></p>
<div id=3D"cm_signature">
<p class=3D"MsoNormal">Its used pretty intense by DC orchestration platform=
s nowadays. Section 5.1 provides more insight.<o:p></o:p></p>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Brgds,<o:p></o:p></p>
<div>
<p class=3D"MsoNormal">G/<br>
<br>
Sent using <a href=3D"https://cloudmagic.com/k/d/mailapp?ct=3Dpa&amp;cv=3D8=
.0.55&amp;pv=3D6.0&amp;source=3Demail_footer_2">
CloudMagic Email</a> <o:p></o:p></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:#787878">On Fri, Nov 13, 2015 a=
t 7:12 PM, Lucy yong &lt;<a href=3D"mailto:lucy.yong@huawei.com">lucy.yong@=
huawei.com</a>&gt; wrote:</span><o:p></o:p></p>
</div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<div id=3D"oldcontent">
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p>Hi John,<br>
<br>
Since the tunnel encap draft goes with encap tunnel attribute and there was=
 no deployment of RFC5512, IMO, we should deprecate encapsulation extended =
community to keep a consistent method.
<br>
<br>
Thus, should the overlay draft states if BGP tunnel encapsulate attribute i=
s not present, ....<br>
<br>
Regards,<br>
Lucy <br>
<br>
-----Original Message-----<br>
From: BESS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ie=
tf.org</a>] On Behalf Of
<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</a><br>
Sent: Friday, November 13, 2015 10:46 AM<br>
To: John E Drake; <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
Cc: IDR; Ali Sajassi (sajassi); Eric Rosen<br>
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02' an=
d draft-ietf-idr-tunnel-encaps-00<br>
<br>
John,<br>
<br>
(Cc'ing IDR.)<br>
<br>
2015-11-13, John E Drake:<br>
&gt;<br>
&gt; I spoke with Eric and Ali and we would like to change both the overlay=
&nbsp; <br>
&gt; draft and the tunnel encaps drafts as follows.<br>
&gt;<br>
&gt; For the overlay draft, replace this text in section 5.1.3:<br>
&gt;<br>
&gt; &quot;If the BGP Encapsulation extended community is not present, then=
 <br>
&gt; thedefault MPLS encapsulation or a statically configured encapsulation=
 <br>
&gt; is<br>
&gt; assumed.&quot;<br>
&gt;<br>
&gt; With the following:<br>
&gt;<br>
&gt; &quot;Note that the MPLS encapsulation tunnel type is needed in order =
to <br>
&gt; distinguish between an advertising node that only supports non-MPLS <b=
r>
&gt; encapsulations and one that supports MPLS and non-MPLS encapsulations.=
 <br>
&gt; An advertising node that only supports MPLS encapsulation does not <br=
>
&gt; need to advertise any encapsulation tunnel types; i.e., if the BGP <br=
>
&gt; Encapsulation extended community is not present, then either MPLS <br>
&gt; encapsulation or a statically configured encapsulation is assumed.&quo=
t;<br>
<br>
Having more text to explain things in the overlay draft does not hurt.<br>
<br>
<br>
&gt;<br>
&gt; For the tunnel encaps draft, replace this text in section 5:<br>
&gt;<br>
&gt; &quot;If the Tunnel Encapsulation attribute contains several TLVs (i.e=
., <br>
&gt; ifit specifies several tunnels), router R may choose any one of those<=
br>
&gt; tunnels, based upon local policy. If any of tunnels' TLVs contain the&=
nbsp; &gt; Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC55=
12], the<br>
&gt; choice of tunnel may be influenced by these sub-TLVs.&quot;<br>
&gt;<br>
&gt; With the following:<br>
&gt;<br>
&gt; &quot;If the Tunnel Encapsulation attribute contains several TLVs (i.e=
., <br>
&gt; ifit specifies several tunnels), router R may choose any one of those =
<br>
&gt; tunnels, based upon local policy. If any of tunnels' TLVs contain the =
<br>
&gt; Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512], <=
br>
&gt; the choice of tunnel may be influenced by these sub-TLVs. Note that if=
 <br>
&gt; none of the TLVs specifies the MPLS tunnel type, a Label Switched Path=
 <br>
&gt; SHOULD NOT be used unless none of the TLVs specifies a feasible tunnel=
.&quot;<br>
<br>
I think that the above will technically work.<br>
<br>
*However* it would be a pity to *not* have the very useful clear-text expla=
nation of the reason for the 'MPLS' type (what you propose to add above in =
the overlay draft) in&nbsp; draft-ietf-idr-tunnel-encaps-00... why provide =
the smooth explanation for only one of
 the specs to which this 'MPLS' type applies ?<br>
<br>
&gt;<br>
&gt; We hope this is satisfactory.<br>
<br>
Close, but not quite there yet :)<br>
<br>
Best,<br>
<br>
-Thomas<br>
<br>
<br>
<br>
<br>
&gt;<br>
&gt;&gt; -----Original Message-----<br>
&gt;&gt; From: Thomas Morin [<a href=3D"mailto:thomas.morin@orange.com">mai=
lto:thomas.morin@orange.com</a>]<br>
&gt;&gt; Sent: Thursday, November 12, 2015 10:08 AM<br>
&gt;&gt; To: John E Drake; <a href=3D"mailto:bess@ietf.org">bess@ietf.org</=
a><br>
&gt;&gt; Cc: Eric Rosen<br>
&gt;&gt; Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overl=
ay-02'<br>
&gt;&gt;<br>
&gt;&gt; Hi John,<br>
&gt;&gt;<br>
&gt;&gt; 2015-11-12, John E Drake:<br>
&gt;&gt;&gt;<br>
&gt;&gt;&gt; Why do you think it should be documented in Eric's draft rathe=
r than <br>
&gt;&gt;&gt; in the<br>
&gt;&gt; EVPN Overlay draft?<br>
&gt;&gt;<br>
&gt;&gt; The issue applies beyond the context of E-VPN overlay specs, and <=
br>
&gt;&gt; exist in any context where different kinds of MPLS(/x) encaps can =
be <br>
&gt;&gt; mixed (E-VPN non-overlay, IP VPNs), which is addressed by Eric's d=
raft.<br>
&gt;&gt;<br>
&gt;&gt; Best,<br>
&gt;&gt;<br>
&gt;&gt; -Thomas<br>
&gt;<br>
<br>
<br>
___________________________________________________________________________=
______________________________________________
<br>
<br>
Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou =
copies sans autorisation. Si vous avez recu ce message par erreur, veuillez=
 le signaler a l'expediteur et le
 detruire ainsi que les pieces jointes. Les messages electroniques etant su=
sceptibles d'alteration, Orange decline toute responsabilite si ce message =
a ete altere, deforme ou falsifie. Merci.<br>
<br>
This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law; they should not be distributed, used=
 or copied without authorisation.<br>
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.<br>
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.<br>
Thank you.<br>
<br>
_______________________________________________<br>
BESS mailing list<br>
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/mailman/listinfo/bess</a><br>
<br>
_______________________________________________<br>
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mailman/listinfo/idr</a><o:p></o:p></p>
</blockquote>
</div>
</div>
</div>
<pre>______________________________________________________________________=
___________________________________________________<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>Ce message et ses pieces jointes peuvent contenir des informations con=
fidentielles ou privilegiees et ne doivent donc<o:p></o:p></pre>
<pre>pas etre diffuses, exploites ou copies sans autorisation. Si vous avez=
 recu ce message par erreur, veuillez le signaler<o:p></o:p></pre>
<pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messag=
es electroniques etant susceptibles d'alteration,<o:p></o:p></pre>
<pre>France Telecom - Orange decline toute responsabilite si ce message a e=
te altere, deforme ou falsifie. Merci<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>This message and its attachments may contain confidential or privilege=
d information that may be protected by law;<o:p></o:p></pre>
<pre>they should not be distributed, used or copied without authorization.<=
o:p></o:p></pre>
<pre>If you have received this email in error, please notify the sender and=
 delete this message and its attachments.<o:p></o:p></pre>
<pre>As emails may be altered, France Telecom - Orange shall not be liable =
if this message was modified, changed or falsified.<o:p></o:p></pre>
<pre>Thank you.<o:p></o:p></pre>
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From: Lucy yong <lucy.yong@huawei.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, Haoweiguo <haoweiguo@huawei.com>
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To: Lucy yong <lucy.yong@huawei.com>, Haoweiguo <haoweiguo@huawei.com>
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From: Lucy yong <lucy.yong@huawei.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, Haoweiguo <haoweiguo@huawei.com>
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From: Lucy yong <lucy.yong@huawei.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, Haoweiguo <haoweiguo@huawei.com>
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From: Lucy yong <lucy.yong@huawei.com>
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To: Lucy yong <lucy.yong@huawei.com>, Haoweiguo <haoweiguo@huawei.com>
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From: Lucy yong <lucy.yong@huawei.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, Haoweiguo <haoweiguo@huawei.com>
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--_000_2691CE0099834E4A9C5044EEC662BB9D5720C9DEdfweml701chm_--



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From: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>
To: Lucy yong <lucy.yong@huawei.com>, Haoweiguo <haoweiguo@huawei.com>
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From: Lucy yong <lucy.yong@huawei.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, Haoweiguo <haoweiguo@huawei.com>
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To: Lucy yong <lucy.yong@huawei.com>, Haoweiguo <haoweiguo@huawei.com>
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From: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>
To: Lucy yong <lucy.yong@huawei.com>, "thomas.morin@orange.com" <thomas.morin@orange.com>, Gunter Van De Velde <guntervandeveldecc@icloud.com>
Thread-Topic: [Idr] [bess] One question about 'draft-ietf-bess-evpn-overlay-02' and draft-ietf-idr-tunnel-encaps-00
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Cc: IDR <idr@ietf.org>, "Ali Sajassi \(sajassi\)" <sajassi@cisco.com>, "bess@ietf.org" <bess@ietf.org>
Subject: Re: [bess] [Idr] One question about 'draft-ietf-bess-evpn-overlay-02' and draft-ietf-idr-tunnel-encaps-00
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From nobody Fri Nov 13 13:25:24 2015
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From: Lucy yong <lucy.yong@huawei.com>
To: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>, "thomas.morin@orange.com" <thomas.morin@orange.com>, Gunter Van De Velde <guntervandeveldecc@icloud.com>
Thread-Topic: [Idr] [bess] One question about 'draft-ietf-bess-evpn-overlay-02' and draft-ietf-idr-tunnel-encaps-00
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Date: Fri, 13 Nov 2015 21:25:05 +0000
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Cc: IDR <idr@ietf.org>, "Ali Sajassi \(sajassi\)" <sajassi@cisco.com>, "bess@ietf.org" <bess@ietf.org>
Subject: Re: [bess] [Idr] One question about 'draft-ietf-bess-evpn-overlay-02' and draft-ietf-idr-tunnel-encaps-00
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Thread-Topic: [Idr] [bess] One question about 'draft-ietf-bess-evpn-overlay-02' and draft-ietf-idr-tunnel-encaps-00
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Archived-At: <http://mailarchive.ietf.org/arch/msg/bess/C6PHPLNOJiDy86c52mAVkU9Pf0Q>
Cc: Gunter Van De Velde <guntervandeveldecc@icloud.com>, "Ali Sajassi \(sajassi\)" <sajassi@cisco.com>, IDR <idr@ietf.org>, "Rabadan, Jorge \(Jorge\)" <jorge.rabadan@alcatel-lucent.com>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, "bess@ietf.org" <bess@ietf.org>
Subject: Re: [bess] [Idr] One question about 'draft-ietf-bess-evpn-overlay-02' and draft-ietf-idr-tunnel-encaps-00
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--_000_97FC12B2CE7643F4BC90537E9514D06Fjunipernet_
Content-Type: text/plain; charset="iso-8859-1"
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Actually, no we don't.  As I indicated the last time you raised this issue,=
 we are only going to use the extended community.

Sent from my iPhone

On Nov 13, 2015, at 4:25 PM, Lucy yong <lucy.yong@huawei.com<mailto:lucy.yo=
ng@huawei.com>> wrote:

Jorge,

Thank you let me know. Too bad, we have to live with it.

Reagrds,
Lucy

From: Rabadan, Jorge (Jorge) [mailto:jorge.rabadan@alcatel-lucent.com]
Sent: Friday, November 13, 2015 3:23 PM
To: Lucy yong; thomas.morin@orange.com<mailto:thomas.morin@orange.com>; Gun=
ter Van De Velde
Cc: Ali Sajassi (sajassi); bess@ietf.org<mailto:bess@ietf.org>; IDR
Subject: Re: [Idr] [bess] One question about 'draft-ietf-bess-evpn-overlay-=
02' and draft-ietf-idr-tunnel-encaps-00

Lucy,

There are several implementations with shipping code using the RFC5512 bgp =
tunnel extended community. It cannot be deprecated.
Thanks.
Jorge

From: Idr <idr-bounces@ietf.org<mailto:idr-bounces@ietf.org>> on behalf of =
Lucy yong <lucy.yong@huawei.com<mailto:lucy.yong@huawei.com>>
Date: Friday, November 13, 2015 at 12:21 PM
To: "thomas.morin@orange.com<mailto:thomas.morin@orange.com>" <thomas.morin=
@orange.com<mailto:thomas.morin@orange.com>>, Gunter Van De Velde <gunterva=
ndeveldecc@icloud.com<mailto:guntervandeveldecc@icloud.com>>
Cc: "Ali Sajassi (sajassi)" <sajassi@cisco.com<mailto:sajassi@cisco.com>>, =
"bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.org>>=
, IDR <idr@ietf.org<mailto:idr@ietf.org>>
Subject: Re: [Idr] [bess] One question about 'draft-ietf-bess-evpn-overlay-=
02' and draft-ietf-idr-tunnel-encaps-00

Yes, kindly for backward compatibility. Having two ways to do it is a pain =
for the implementation.
Lucy

From: thomas.morin@orange.com<mailto:thomas.morin@orange.com> [mailto:thoma=
s.morin@orange.com]
Sent: Friday, November 13, 2015 2:19 PM
To: Gunter Van De Velde; Lucy yong
Cc: John E Drake; bess@ietf.org<mailto:bess@ietf.org>; IDR; Ali Sajassi (sa=
jassi)
Subject: RE: [Idr] [bess] One question about 'draft-ietf-bess-evpn-overlay-=
02' and draft-ietf-idr-tunnel-encaps-00


Lucy,

The tunnel encap also describe how to use the extended community, in sectio=
n 6.

Best,

-Thomas


---- Lucy yong a =E9crit ----
Hi Gunter,

Thank you to point to the right section. This overlay draft suggests to use=
 Encapsulation extended community to indicate the type of data plane encaps=
ulation to be used for all EVC routes. But the tunnel encap draft proposes =
to use tunnel encapsulation attribute + sub-TLVs to indicate the type of da=
ta plane encapsulation to be used for a prefix. Why do we want to have two =
solutions for the same space?

Since this overlay draft is not RFC yet, it is good for the community to ma=
ke a decision on it, which keeps simple for the implementation. It is not h=
ard to modify the draft to use tunnel encapsulation attribute indicating th=
e type of data plane encapsulation for all EVC routes.

Regards,
Lucy

From: Gunter Van De Velde [mailto:guntervandeveldecc@icloud.com]
Sent: Friday, November 13, 2015 1:46 PM
To: Lucy yong
Cc: thomas.morin@orange.com<mailto:thomas.morin@orange.com>; John E Drake; =
bess@ietf.org<mailto:bess@ietf.org>; IDR; Ali Sajassi (sajassi)
Subject: Re: [Idr] [bess] One question about 'draft-ietf-bess-evpn-overlay-=
02' and draft-ietf-idr-tunnel-encaps-00


Hi Lucy,

Did you take time to read
https://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-02
Its used pretty intense by DC orchestration platforms nowadays. Section 5.1=
 provides more insight.

Brgds,
G/

Sent using CloudMagic Email<https://cloudmagic.com/k/d/mailapp?ct=3Dpa&cv=
=3D8.0.55&pv=3D6.0&source=3Demail_footer_2>
On Fri, Nov 13, 2015 at 7:12 PM, Lucy yong <lucy.yong@huawei.com<mailto:luc=
y.yong@huawei.com>> wrote:


Hi John,

Since the tunnel encap draft goes with encap tunnel attribute and there was=
 no deployment of RFC5512, IMO, we should deprecate encapsulation extended =
community to keep a consistent method.

Thus, should the overlay draft states if BGP tunnel encapsulate attribute i=
s not present, ....

Regards,
Lucy

-----Original Message-----
From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of thomas.morin@orange.=
com<mailto:thomas.morin@orange.com>
Sent: Friday, November 13, 2015 10:46 AM
To: John E Drake; bess@ietf.org<mailto:bess@ietf.org>
Cc: IDR; Ali Sajassi (sajassi); Eric Rosen
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02' an=
d draft-ietf-idr-tunnel-encaps-00

John,

(Cc'ing IDR.)

2015-11-13, John E Drake:
>
> I spoke with Eric and Ali and we would like to change both the overlay
> draft and the tunnel encaps drafts as follows.
>
> For the overlay draft, replace this text in section 5.1.3:
>
> "If the BGP Encapsulation extended community is not present, then
> thedefault MPLS encapsulation or a statically configured encapsulation
> is
> assumed."
>
> With the following:
>
> "Note that the MPLS encapsulation tunnel type is needed in order to
> distinguish between an advertising node that only supports non-MPLS
> encapsulations and one that supports MPLS and non-MPLS encapsulations.
> An advertising node that only supports MPLS encapsulation does not
> need to advertise any encapsulation tunnel types; i.e., if the BGP
> Encapsulation extended community is not present, then either MPLS
> encapsulation or a statically configured encapsulation is assumed."

Having more text to explain things in the overlay draft does not hurt.


>
> For the tunnel encaps draft, replace this text in section 5:
>
> "If the Tunnel Encapsulation attribute contains several TLVs (i.e.,
> ifit specifies several tunnels), router R may choose any one of those
> tunnels, based upon local policy. If any of tunnels' TLVs contain the  > =
Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512], the
> choice of tunnel may be influenced by these sub-TLVs."
>
> With the following:
>
> "If the Tunnel Encapsulation attribute contains several TLVs (i.e.,
> ifit specifies several tunnels), router R may choose any one of those
> tunnels, based upon local policy. If any of tunnels' TLVs contain the
> Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512],
> the choice of tunnel may be influenced by these sub-TLVs. Note that if
> none of the TLVs specifies the MPLS tunnel type, a Label Switched Path
> SHOULD NOT be used unless none of the TLVs specifies a feasible tunnel."

I think that the above will technically work.

*However* it would be a pity to *not* have the very useful clear-text expla=
nation of the reason for the 'MPLS' type (what you propose to add above in =
the overlay draft) in  draft-ietf-idr-tunnel-encaps-00... why provide the s=
mooth explanation for only one of the specs to which this 'MPLS' type appli=
es ?

>
> We hope this is satisfactory.

Close, but not quite there yet :)

Best,

-Thomas




>
>> -----Original Message-----
>> From: Thomas Morin [mailto:thomas.morin@orange.com]
>> Sent: Thursday, November 12, 2015 10:08 AM
>> To: John E Drake; bess@ietf.org<mailto:bess@ietf.org>
>> Cc: Eric Rosen
>> Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02'
>>
>> Hi John,
>>
>> 2015-11-12, John E Drake:
>>>
>>> Why do you think it should be documented in Eric's draft rather than
>>> in the
>> EVPN Overlay draft?
>>
>> The issue applies beyond the context of E-VPN overlay specs, and
>> exist in any context where different kinds of MPLS(/x) encaps can be
>> mixed (E-VPN non-overlay, IP VPNs), which is addressed by Eric's draft.
>>
>> Best,
>>
>> -Thomas
>


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--_000_97FC12B2CE7643F4BC90537E9514D06Fjunipernet_
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<div>Actually, no we don't. &nbsp;As I indicated the last time you raised t=
his issue, we are only going to use the extended community.<br>
<br>
Sent from my iPhone</div>
<div><br>
On Nov 13, 2015, at 4:25 PM, Lucy yong &lt;<a href=3D"mailto:lucy.yong@huaw=
ei.com">lucy.yong@huawei.com</a>&gt; wrote:<br>
<br>
</div>
<blockquote type=3D"cite">
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Jorge,<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Thank you let me know. To=
o bad, we have to live with it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Reagrds,<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Lucy<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Rabadan,=
 Jorge (Jorge) [<a href=3D"mailto:jorge.rabadan@alcatel-lucent.com">mailto:=
jorge.rabadan@alcatel-lucent.com</a>]
<br>
<b>Sent:</b> Friday, November 13, 2015 3:23 PM<br>
<b>To:</b> Lucy yong; <a href=3D"mailto:thomas.morin@orange.com">thomas.mor=
in@orange.com</a>; Gunter Van De Velde<br>
<b>Cc:</b> Ali Sajassi (sajassi); <a href=3D"mailto:bess@ietf.org">bess@iet=
f.org</a>; IDR<br>
<b>Subject:</b> Re: [Idr] [bess] One question about 'draft-ietf-bess-evpn-o=
verlay-02' and draft-ietf-idr-tunnel-encaps-00<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;;color:black">Lucy,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;;color:black">There are several implementat=
ions with shipping code using the RFC5512 bgp tunnel extended community. It=
 cannot be deprecated.&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;;color:black">Thanks.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;;color:black">Jorge<o:p></o:p></span></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&=
quot;;color:black">Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org">idr-boun=
ces@ietf.org</a>&gt; on behalf of Lucy yong &lt;<a href=3D"mailto:lucy.yong=
@huawei.com">lucy.yong@huawei.com</a>&gt;<br>
<b>Date: </b>Friday, November 13, 2015 at 12:21 PM<br>
<b>To: </b>&quot;<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@or=
ange.com</a>&quot; &lt;<a href=3D"mailto:thomas.morin@orange.com">thomas.mo=
rin@orange.com</a>&gt;, Gunter Van De Velde &lt;<a href=3D"mailto:guntervan=
develdecc@icloud.com">guntervandeveldecc@icloud.com</a>&gt;<br>
<b>Cc: </b>&quot;Ali Sajassi (sajassi)&quot; &lt;<a href=3D"mailto:sajassi@=
cisco.com">sajassi@cisco.com</a>&gt;, &quot;<a href=3D"mailto:bess@ietf.org=
">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.or=
g</a>&gt;, IDR &lt;<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [Idr] [bess] One question about 'draft-ietf-bess-evpn-o=
verlay-02' and draft-ietf-idr-tunnel-encaps-00<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.5pt;font-family:&quot;Ar=
ial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yes, kindly for backward =
compatibility. Having two ways to do it is a pain for the implementation.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Lucy</span><span style=3D=
"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span sty=
le=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot=
;;color:black">
<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</a> [<a =
href=3D"mailto:thomas.morin@orange.com">mailto:thomas.morin@orange.com</a>]
<br>
<b>Sent:</b> Friday, November 13, 2015 2:19 PM<br>
<b>To:</b> Gunter Van De Velde; Lucy yong<br>
<b>Cc:</b> John E Drake; <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>=
; IDR; Ali Sajassi (sajassi)<br>
<b>Subject:</b> RE: [Idr] [bess] One question about 'draft-ietf-bess-evpn-o=
verlay-02' and draft-ietf-idr-tunnel-encaps-00</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p><span style=3D"color:black">Lucy, <o:p></o:p></span></p>
<p><span style=3D"color:black">The tunnel encap also describe how to use th=
e extended community, in section 6.<o:p></o:p></span></p>
<p><span style=3D"color:black">Best,<o:p></o:p></span></p>
<p><span style=3D"color:black">-Thomas<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-f=
amily:&quot;Times New Roman&quot;,&quot;serif&quot;;color:black"><br>
<br>
---- Lucy yong a =E9crit ----</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Hi Gunter,</span><span st=
yle=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Thank you to point to the=
 right section. This overlay draft suggests to use Encapsulation extended c=
ommunity to indicate the type of data plane encapsulation
 to be used for all EVC routes. But the tunnel encap draft proposes to use =
tunnel encapsulation attribute &#43; sub-TLVs to indicate the type of data =
plane encapsulation to be used for a prefix. Why do we want to have two sol=
utions for the same space?
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Since this overlay draft =
is not RFC yet, it is good for the community to make a decision on it, whic=
h keeps simple for the implementation. It is not hard to
 modify the draft to use tunnel encapsulation attribute indicating the type=
 of data plane encapsulation for all EVC routes.</span><span style=3D"color=
:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Regards,</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Lucy</span><span style=3D=
"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span sty=
le=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot=
;;color:black"> Gunter Van De Velde [<a href=3D"mailto:guntervandeveldecc@i=
cloud.com">mailto:guntervandeveldecc@icloud.com</a>]
<br>
<b>Sent:</b> Friday, November 13, 2015 1:46 PM<br>
<b>To:</b> Lucy yong<br>
<b>Cc:</b> <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.c=
om</a>; John E Drake;
<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>; IDR; Ali Sajassi (sajas=
si)<br>
<b>Subject:</b> Re: [Idr] [bess] One question about 'draft-ietf-bess-evpn-o=
verlay-02' and draft-ietf-idr-tunnel-encaps-00</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p><span style=3D"color:black">Hi Lucy,<o:p></o:p></span></p>
<p><span style=3D"color:black">Did you take time to read <br>
<a href=3D"https://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-02">htt=
ps://tools.ietf.org/html/draft-ietf-bess-evpn-overlay-02</a><o:p></o:p></sp=
an></p>
<div id=3D"cm_signature">
<p class=3D"MsoNormal"><span style=3D"color:black">Its used pretty intense =
by DC orchestration platforms nowadays. Section 5.1 provides more insight.<=
o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Brgds,<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">G/<br>
<br>
Sent using <a href=3D"https://cloudmagic.com/k/d/mailapp?ct=3Dpa&amp;cv=3D8=
.0.55&amp;pv=3D6.0&amp;source=3Demail_footer_2">
CloudMagic Email</a> <o:p></o:p></span></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:#787878">On Fri, Nov 13, 2015 a=
t 7:12 PM, Lucy yong &lt;<a href=3D"mailto:lucy.yong@huawei.com">lucy.yong@=
huawei.com</a>&gt; wrote:</span><span style=3D"color:black"><o:p></o:p></sp=
an></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div id=3D"oldcontent">
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p><span style=3D"color:black">Hi John,<br>
<br>
Since the tunnel encap draft goes with encap tunnel attribute and there was=
 no deployment of RFC5512, IMO, we should deprecate encapsulation extended =
community to keep a consistent method.
<br>
<br>
Thus, should the overlay draft states if BGP tunnel encapsulate attribute i=
s not present, ....<br>
<br>
Regards,<br>
Lucy <br>
<br>
-----Original Message-----<br>
From: BESS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ie=
tf.org</a>] On Behalf Of
<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</a><br>
Sent: Friday, November 13, 2015 10:46 AM<br>
To: John E Drake; <a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
Cc: IDR; Ali Sajassi (sajassi); Eric Rosen<br>
Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overlay-02' an=
d draft-ietf-idr-tunnel-encaps-00<br>
<br>
John,<br>
<br>
(Cc'ing IDR.)<br>
<br>
2015-11-13, John E Drake:<br>
&gt;<br>
&gt; I spoke with Eric and Ali and we would like to change both the overlay=
&nbsp; <br>
&gt; draft and the tunnel encaps drafts as follows.<br>
&gt;<br>
&gt; For the overlay draft, replace this text in section 5.1.3:<br>
&gt;<br>
&gt; &quot;If the BGP Encapsulation extended community is not present, then=
 <br>
&gt; thedefault MPLS encapsulation or a statically configured encapsulation=
 <br>
&gt; is<br>
&gt; assumed.&quot;<br>
&gt;<br>
&gt; With the following:<br>
&gt;<br>
&gt; &quot;Note that the MPLS encapsulation tunnel type is needed in order =
to <br>
&gt; distinguish between an advertising node that only supports non-MPLS <b=
r>
&gt; encapsulations and one that supports MPLS and non-MPLS encapsulations.=
 <br>
&gt; An advertising node that only supports MPLS encapsulation does not <br=
>
&gt; need to advertise any encapsulation tunnel types; i.e., if the BGP <br=
>
&gt; Encapsulation extended community is not present, then either MPLS <br>
&gt; encapsulation or a statically configured encapsulation is assumed.&quo=
t;<br>
<br>
Having more text to explain things in the overlay draft does not hurt.<br>
<br>
<br>
&gt;<br>
&gt; For the tunnel encaps draft, replace this text in section 5:<br>
&gt;<br>
&gt; &quot;If the Tunnel Encapsulation attribute contains several TLVs (i.e=
., <br>
&gt; ifit specifies several tunnels), router R may choose any one of those<=
br>
&gt; tunnels, based upon local policy. If any of tunnels' TLVs contain the&=
nbsp; &gt; Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC55=
12], the<br>
&gt; choice of tunnel may be influenced by these sub-TLVs.&quot;<br>
&gt;<br>
&gt; With the following:<br>
&gt;<br>
&gt; &quot;If the Tunnel Encapsulation attribute contains several TLVs (i.e=
., <br>
&gt; ifit specifies several tunnels), router R may choose any one of those =
<br>
&gt; tunnels, based upon local policy. If any of tunnels' TLVs contain the =
<br>
&gt; Color sub-TLV and/or the Protocol Type sub-TLV defined in [RFC5512], <=
br>
&gt; the choice of tunnel may be influenced by these sub-TLVs. Note that if=
 <br>
&gt; none of the TLVs specifies the MPLS tunnel type, a Label Switched Path=
 <br>
&gt; SHOULD NOT be used unless none of the TLVs specifies a feasible tunnel=
.&quot;<br>
<br>
I think that the above will technically work.<br>
<br>
*However* it would be a pity to *not* have the very useful clear-text expla=
nation of the reason for the 'MPLS' type (what you propose to add above in =
the overlay draft) in&nbsp; draft-ietf-idr-tunnel-encaps-00... why provide =
the smooth explanation for only one of
 the specs to which this 'MPLS' type applies ?<br>
<br>
&gt;<br>
&gt; We hope this is satisfactory.<br>
<br>
Close, but not quite there yet :)<br>
<br>
Best,<br>
<br>
-Thomas<br>
<br>
<br>
<br>
<br>
&gt;<br>
&gt;&gt; -----Original Message-----<br>
&gt;&gt; From: Thomas Morin [<a href=3D"mailto:thomas.morin@orange.com">mai=
lto:thomas.morin@orange.com</a>]<br>
&gt;&gt; Sent: Thursday, November 12, 2015 10:08 AM<br>
&gt;&gt; To: John E Drake; <a href=3D"mailto:bess@ietf.org">bess@ietf.org</=
a><br>
&gt;&gt; Cc: Eric Rosen<br>
&gt;&gt; Subject: Re: [bess] One question about 'draft-ietf-bess-evpn-overl=
ay-02'<br>
&gt;&gt;<br>
&gt;&gt; Hi John,<br>
&gt;&gt;<br>
&gt;&gt; 2015-11-12, John E Drake:<br>
&gt;&gt;&gt;<br>
&gt;&gt;&gt; Why do you think it should be documented in Eric's draft rathe=
r than <br>
&gt;&gt;&gt; in the<br>
&gt;&gt; EVPN Overlay draft?<br>
&gt;&gt;<br>
&gt;&gt; The issue applies beyond the context of E-VPN overlay specs, and <=
br>
&gt;&gt; exist in any context where different kinds of MPLS(/x) encaps can =
be <br>
&gt;&gt; mixed (E-VPN non-overlay, IP VPNs), which is addressed by Eric's d=
raft.<br>
&gt;&gt;<br>
&gt;&gt; Best,<br>
&gt;&gt;<br>
&gt;&gt; -Thomas<br>
&gt;<br>
<br>
<br>
___________________________________________________________________________=
______________________________________________
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sceptibles d'alteration, Orange decline toute responsabilite si ce message =
a ete altere, deforme ou falsifie. Merci.<br>
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This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law; they should not be distributed, used=
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If you have received this email in error, please notify the sender and dele=
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</blockquote>
</div>
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</div>
<pre><span style=3D"color:black">__________________________________________=
___________________________________________________________________________=
____<o:p></o:p></span></pre>
<pre><span style=3D"color:black">&nbsp;<o:p></o:p></span></pre>
<pre><span style=3D"color:black">Ce message et ses pieces jointes peuvent c=
ontenir des informations confidentielles ou privilegiees et ne doivent donc=
<o:p></o:p></span></pre>
<pre><span style=3D"color:black">pas etre diffuses, exploites ou copies san=
s autorisation. Si vous avez recu ce message par erreur, veuillez le signal=
er<o:p></o:p></span></pre>
<pre><span style=3D"color:black">a l'expediteur et le detruire ainsi que le=
s pieces jointes. Les messages electroniques etant susceptibles d'alteratio=
n,<o:p></o:p></span></pre>
<pre><span style=3D"color:black">France Telecom - Orange decline toute resp=
onsabilite si ce message a ete altere, deforme ou falsifie. Merci<o:p></o:p=
></span></pre>
<pre><span style=3D"color:black">&nbsp;<o:p></o:p></span></pre>
<pre><span style=3D"color:black">This message and its attachments may conta=
in confidential or privileged information that may be protected by law;<o:p=
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<pre><span style=3D"color:black">they should not be distributed, used or co=
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<pre><span style=3D"color:black">If you have received this email in error, =
please notify the sender and delete this message and its attachments.<o:p><=
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 Orange shall not be liable if this message was modified, changed or falsif=
ied.<o:p></o:p></span></pre>
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</div>
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</blockquote>
</div>
</div>
</blockquote>
<blockquote type=3D"cite">
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From: Haoweiguo <haoweiguo@huawei.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, Linda Dunbar <linda.dunbar@huawei.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: draft-hao-bess-inter-nvo3-vpn-optionc
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Date: Sun, 15 Nov 2015 12:51:20 +0000
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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--_000_DD5FC8DE455C3348B94340C0AB5517334F8E0A46nkgeml501mbschi_
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Hi Wim,

Thanks for your detail explanation.

In your solution, MPLSoGRE/oUDP needs to be supported in data center networ=
k. To support option-c interconnection with WAN network, TORs/NVEs need to =
add one BGP LSP Label in middle layer, so TORs/NVEs need to perform MPLS(VP=
N Layer) + MPLS (BGP LSP Label) + GRE/UDP encapsulation for the traffic fro=
m local connecting end systems to WAN network. In your solution, GRE/UDP la=
yer is not used for transport layer stitching at ASBR-d, traditonal end to =
end BGP LSP is still used for transport layer.

In our solution, VXLAN/NVGRE are two of the focuses, and for VXLAN/NVGRE an=
d MPLS VPN network option-c mode interconnection, our solution seems to be =
the only choice. For MPLS Over GRE/UDP, it's the debating point.We propose =
the same interconnecting solution for MPLSoGRE/oUDP, your proposal provides=
 another optional solution, i think it works and is good. However, i think =
an independent informational draft only for this point maybe not necessary,=
 we can describe it in same single draft which includes all possible soluti=
ons for IP overlay network(VXLAN/NVGRE/VXLAN-GPE/MPLSoGRE/MPLSoUDP) and MPL=
S VPN network interworking using option-c mode.

In summary, Option-c mode interconnecting solution between IP overlay netwo=
rk and MPLS VPN network is needed for BESS working group, and we should cov=
er all possible solutions for all possible mainstream IP overlay encapsulat=
ions in single draft.

Thanks,

weiguo

________________________________
From: BESS [bess-bounces@ietf.org] on behalf of Henderickx, Wim (Wim) [wim.=
henderickx@alcatel-lucent.com]
Sent: Saturday, November 14, 2015 15:12
To: Linda Dunbar; bess@ietf.org
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Linda, first of all the draft does not say anything about this and 2nd I am=
 not confused and 3rd I explained the reasons why this does not fly. So rea=
d them

From: Linda Dunbar <linda.dunbar@huawei.com<mailto:linda.dunbar@huawei.com>=
>
Date: Friday 13 November 2015 at 23:18
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org=
<mailto:bess@ietf.org>>
Subject: RE: draft-hao-bess-inter-nvo3-vpn-optionc

Wim,

If the draft adds some description to say that the VxLAN header is decapsul=
ated, and the MAC header is terminated. It is the inner IP data frames to b=
e passed to the MPLS IP-VPNs.

Will it clear out the confusion?

Linda

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Thursday, November 12, 2015 8:34 AM
To: bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

I don=92t support the adoption of this draft as a WG. There is a major flaw=
 in this proposal:
Basically the encapsulation of VXLAN/NVGRE is incompatible with MPLS IP-VPN=
s. VXLAN/NVGRE contains a MAC address and IP-VPNs don=92t. The draft does n=
ot talk about any of this and introduces a lot of complexity for nothing.

If we want to describe a model C VPN interconnect with a IP fabric in a DC =
I recommend to do an informational RFC that describes this using VXLAN-GPE,=
 MPLSoGRE or MPLSoUDP encapsulation and retain the E2E MPLS label we define=
d in RFC4364.

--_000_DD5FC8DE455C3348B94340C0AB5517334F8E0A46nkgeml501mbschi_
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Content-Transfer-Encoding: quoted-printable

<html dir=3D"ltr">
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
<style id=3D"owaParaStyle">P {
	MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
P {
	MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
</style>
</head>
<body style=3D"FONT-FAMILY: Calibri,sans-serif; WORD-WRAP: break-word; COLO=
R: rgb(0,0,0); FONT-SIZE: 14px" fPStyle=3D"1" ocsi=3D"0">
<div style=3D"FONT-FAMILY: Tahoma; DIRECTION: ltr; COLOR: #000000; FONT-SIZ=
E: 10pt">
<font size=3D"3" face=3D"Times New Roman">
<p><font size=3D"3" face=3D"Times New Roman">Hi Wim,</font></p>
<p><font size=3D"3" face=3D"Times New Roman">Thanks for your detail explana=
tion.</font></p>
<p><font size=3D"3" face=3D"Times New Roman">In your solution, MPLSoGRE/oUD=
P needs to be supported in data center network. To support option-c interco=
nnection with WAN network, TORs/NVEs need to add one BGP LSP Label in middl=
e layer, so TORs/NVEs need to perform
 MPLS(VPN Layer) &#43; MPLS (BGP LSP Label) &#43; GRE/UDP encapsulation for=
 the traffic from local connecting end systems to WAN network. In your solu=
tion, GRE/UDP layer is not used for transport layer stitching at ASBR-d, tr=
aditonal end to end BGP LSP is still used
 for transport layer.</font></p>
<p><font size=3D"3" face=3D"Times New Roman">In our solution, VXLAN/NVGRE a=
re two of the focuses, and for VXLAN/NVGRE and MPLS VPN network option-c mo=
de interconnection, our solution seems to be the only choice. For MPLS Over=
 GRE/UDP, it's the debating point.We
 propose the same interconnecting solution for MPLSoGRE/oUDP, your proposal=
 provides another optional solution, i think it works and is good. However,=
 i think an independent informational draft only for&nbsp;this point maybe =
not necessary, we can describe it in
 same single draft which includes&nbsp;all possible solutions for IP overla=
y network(VXLAN/NVGRE/VXLAN-GPE/MPLSoGRE/MPLSoUDP) and MPLS VPN network int=
erworking using option-c mode.</font></p>
<p><font size=3D"3" face=3D"Times New Roman">In summary, Option-c mode inte=
rconnecting solution between IP overlay network and MPLS VPN network is nee=
ded for BESS working group, and we should cover all possible solutions for =
all possible mainstream IP overlay encapsulations
 in single draft.</font></p>
<p><font size=3D"3" face=3D"Times New Roman">Thanks,</font></p>
<p><font size=3D"3" face=3D"Times New Roman">weiguo</font></p>
</font>
<div style=3D"FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px=
">
<hr tabindex=3D"-1">
<div style=3D"DIRECTION: ltr" id=3D"divRpF187865"><font color=3D"#000000" s=
ize=3D"2" face=3D"Tahoma"><b>From:</b> BESS [bess-bounces@ietf.org] on beha=
lf of Henderickx, Wim (Wim) [wim.henderickx@alcatel-lucent.com]<br>
<b>Sent:</b> Saturday, November 14, 2015 15:12<br>
<b>To:</b> Linda Dunbar; bess@ietf.org<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br>
</font><br>
</div>
<div></div>
<div>
<div>
<div>
<div>Linda, first of all the draft does not say anything about this and 2nd=
 I am not confused and 3rd I explained the reasons why this does not fly. S=
o read them</div>
<div>
<div id=3D"MAC_OUTLOOK_SIGNATURE"></div>
</div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"BORDER-BOTTOM: medium none; TEXT-ALIGN: left; BORDER-LEFT: me=
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-FAMILY: Calibri; COLOR: black; FONT-SIZE: 12pt; BORDER-TOP: #b5c4df 1pt so=
lid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"FONT-WEIGHT: bold">From: </span>Linda Dunbar &lt;<a href=3D"=
mailto:linda.dunbar@huawei.com" target=3D"_blank">linda.dunbar@huawei.com</=
a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Date: </span>Friday 13 November 2015 at 2=
3:18<br>
<span style=3D"FONT-WEIGHT: bold">To: </span>Wim Henderickx &lt;<a href=3D"=
mailto:wim.henderickx@alcatel-lucent.com" target=3D"_blank">wim.henderickx@=
alcatel-lucent.com</a>&gt;, &quot;<a href=3D"mailto:bess@ietf.org" target=
=3D"_blank">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" ta=
rget=3D"_blank">bess@ietf.org</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Subject: </span>RE: draft-hao-bess-inter-=
nvo3-vpn-optionc<br>
</div>
<div><br>
</div>
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<div lang=3D"EN-US">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt">Wim,
</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt">If the draft adds some description to s=
ay that the VxLAN header is decapsulated, and the MAC header is terminated.=
 It is the inner IP data frames to be
 passed to the MPLS IP-VPNs. </span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt">Will it clear out the confusion?
</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt">Linda</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt"></span>&nbsp;</p>
<div>
<div style=3D"BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING=
-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1p=
t solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<p class=3D"MsoNormal"><b><span style=3D"FONT-FAMILY: Tahoma,sans-serif; FO=
NT-SIZE: 10pt">From:</span></b><span style=3D"FONT-FAMILY: Tahoma,sans-seri=
f; FONT-SIZE: 10pt"> BESS [<a href=3D"mailto:bess-bounces@ietf.org" target=
=3D"_blank">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
<b>Sent:</b> Thursday, November 12, 2015 8:34 AM<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org=
</a><br>
<b>Subject:</b> [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Consolas; COLOR: black; =
FONT-SIZE: 7pt">I don=92t support the adoption of this draft as a WG. There=
 is a major flaw in this proposal:</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Consolas; COLOR: black; =
FONT-SIZE: 7pt">Basically the encapsulation of VXLAN/NVGRE is incompatible =
with MPLS IP-VPNs. VXLAN/NVGRE contains a MAC address and IP-VPNs don=92t. =
The draft does not talk about any of this
 and introduces a lot of complexity for nothing.</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Consolas; COLOR: black; =
FONT-SIZE: 7pt"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Consolas; COLOR: black; =
FONT-SIZE: 7pt">If we want to describe a model C VPN interconnect with a IP=
 fabric in a DC I recommend to do an informational RFC that describes this =
using VXLAN-GPE, MPLSoGRE or MPLSoUDP
 encapsulation and retain the E2E MPLS label we defined in RFC4364.</span><=
/p>
</div>
</div>
</div>
</div>
</div>
</span></div>
</div>
</div>
</body>
</html>

--_000_DD5FC8DE455C3348B94340C0AB5517334F8E0A46nkgeml501mbschi_--


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Hi Folks,
A new version of this draft was posted.  Vlan action part was updated, comp=
licated VLAN action such as SwapPush, PushSwap can be represented in single=
 extended community.
Your comments and suggestions are welcomed.
Thanks,
weiguo

________________________________________
From: internet-drafts@ietf.org [internet-drafts@ietf.org]
Sent: Monday, November 16, 2015 14:16
To: Liangqiandeng; Liangqiandeng; Haoweiguo; Stephane Litkowski; Zhuangshun=
wan; Haoweiguo
Subject: New Version Notification for draft-ietf-idr-flowspec-l2vpn-03.txt

A new version of I-D, draft-ietf-idr-flowspec-l2vpn-03.txt
has been successfully submitted by Weiguo Hao and posted to the
IETF repository.

Name:           draft-ietf-idr-flowspec-l2vpn
Revision:       03
Title:          Dissemination of Flow Specification Rules for L2 VPN
Document date:  2015-11-16
Group:          idr
Pages:          13
URL:            https://www.ietf.org/internet-drafts/draft-ietf-idr-flowspe=
c-l2vpn-03.txt
Status:         https://datatracker.ietf.org/doc/draft-ietf-idr-flowspec-l2=
vpn/
Htmlized:       https://tools.ietf.org/html/draft-ietf-idr-flowspec-l2vpn-0=
3
Diff:           https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-idr-flowspec=
-l2vpn-03

Abstract:
   This document defines BGP flow-spec extension for Ethernet traffic
   filtering in L2 VPN network. SAFI=3D134 in [RFC5575] is redefined for
   dissemination traffic filtering information in an L2VPN environment.
   A new subset of component types and extended community also are
   defined.




Please note that it may take a couple of minutes from the time of submissio=
n
until the htmlized version and diff are available at tools.ietf.org.

The IETF Secretariat=


From nobody Mon Nov 16 07:38:49 2015
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To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>
References: <1214F6D7-7E00-4C95-82C4-349393828A92@alcatel-lucent.com> <11888_1447341897_5644AF49_11888_5397_1_5644AF48.6000407@orange.com> <31144DC0-E53C-4890-AD51-29A49C45F6DB@alcatel-lucent.com> <26952_1447346782_5644C25E_26952_9119_1_5644C25D.8070806@orange.com> <94504E5E-B0D8-41DC-8967-E860E46F4C92@alcatel-lucent.com> <5645A614.4010806@orange.com> <E3917F57-B9F4-417D-9E9B-8D1330CC2506@alcatel-lucent.com> <28696_1447432615_564611A7_28696_1036_1_564611A6.2010509@orange.com> <61AE87C2-D215-4135-94A3-6C648FAA614E@alcatel-lucent.com>
From: Thomas Morin <thomas.morin@orange.com>
Organization: Orange
Message-ID: <5649F84E.8050605@orange.com>
Date: Mon, 16 Nov 2015 16:37:50 +0100
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Hi Wim,

2015-11-13, Henderickx, Wim (Wim):
> Thomas, we can discuss forever and someone need to describe 
> requirements, but the current proposal I cannot agree to for the 
> reasons explained.

Well, although discussing forever is certainly not the goal, the reasons 
for rejecting a proposal need to be thoroughly understood.

(more below)


>
> 2015-11-13, Henderickx, Wim (Wim):
>> Thomas, we need a solution that is implementable and will scale in 
>> control/data-plane. As such the solution I outline is standardised 
>> today and does not need new extensions in control/data-plane. Hence 
>> informational draft and can be implemented if there is market demand.
>
> The above argument would fully make sense to me if support 
> MPLS/MPLS/(UDP or GRE) was common place in ToRs or vswitches.
>
>> With respect to MAC you need to address both directions and does not 
>> make sense to manage this if it is not required/doe snot add value.
>
> On VXLAN and the Ethernet header: it looks to me that addressing both 
> direction is just a matter of documenting in the draft (if not already 
> there) what is the expected behavior for VXLAN/NVGRE. But VXLAN and 
> NVGRE are not the only encaps proposed in the specs anyway.
>
> Compared to 3-label option C, my understanding is that the added-value 
> is to not require the support of an MPLS/MPLS/(UDP or GRE) encap in 
> ToRs and vswitches.
>
> The right trade-off to make may in fact depend on whether you prefer:
> (a) a new dataplane stitching behavior on DC ASBRs (the behavior 
> specified in this draft)
> or (b) an evolution of the encaps on the vswitches and ToRs to support 
> MPLS/MPLS/(UDP or GRE)
>
> WH> b depends on the use case

I don't get what you mean by "b depends on the use case".
I wrote the above based on the idea that the encap used in 
MPLS/MPLS/(UDP or GRE), which hence has to be supported on the ToRs and 
vswitches.
Another possibility would be service-label/middle-label/Ethernet 
assuming an L2 adjacency between vswitches/ToRs and ASBRs, but this 
certainly does not match your typical DC architecture. Or perhaps had 
you something else in mind ?

> WH> and depending on implementation you don’t need to change any of 
> the TOR/vswitches.

Does this mean that for some implementations you may not need to change 
any of the TOR/vswitches, but that for some others you may ?

Let me take a practical example : while I can quite easily see how to 
implement the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based 
on current vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, 
GRE) support in commonplace vswitches seems to me as making that 
alternate solution you suggest harder to implement.

-Thomas





>
>>
>> From: Thomas Morin <thomas.morin@orange.com>
>> Organization: Orange
>> Date: Friday 13 November 2015 at 09:57
>> To: Wim Henderickx <wim.henderickx@alcatel-lucent.com>
>> Cc: "bess@ietf.org" <bess@ietf.org <mailto:bess@ietf.org>>
>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>
>> Hi Wim,
>>
>> I agree on the analysis that this proposal is restricted to 
>> implementations that supports the chosen encap with non-IANA ports 
>> (which may be hard to achieve for instance on hardware 
>> implementations, as you suggest), or to context where managing 
>> multiple IPs would be operationally viable.
>>
>> However, it does not seem obvious to me how the alternative you 
>> propose [relying on 3-label option C with an MPLS/MPLS/(UDP|GRE) 
>> encap] addresses the issue of whether the encap behavior is supported 
>> or not (e.g. your typical ToR chipset possibly may not support this 
>> kind of encap,  and even software-based switches may not be ready to 
>> support that today).
>>
>> My take is that having different options to adapt to various 
>> implementations constraints we may have would have value.
>>
>> (+ one question below on VXLAN...)
>>
>> -Thomas
>>
>>
>> 2015-11-12, Henderickx, Wim (Wim):
>>>> On VXLAN/NVGRE, do you challenge the fact that they would be used 
>>>> with a dummy MAC address that would be replaced by the right MAC by 
>>>> a sender based on an ARP request when needed ?
>>>
>>> Is the above the issue you had in mind about VXLAN and NVGRE ?
>>>
>>> WH> yes
>>
>> I you don't mind me asking : why do you challenge that ?
>>
>>
>


--------------020806020801060309080706
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Content-Transfer-Encoding: 8bit

<html>
  <head>
    <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    <div class="moz-cite-prefix">Hi Wim,<br>
      <br>
      2015-11-13, Henderickx, Wim (Wim):<br>
    </div>
    <blockquote
      cite="mid:61AE87C2-D215-4135-94A3-6C648FAA614E@alcatel-lucent.com"
      type="cite">
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      <div>
        <div>Thomas, we can discuss forever and someone need to describe
          requirements, but the current proposal I cannot agree to for
          the reasons explained.</div>
      </div>
    </blockquote>
    <br>
    Well, although discussing forever is certainly not the goal, the
    reasons for rejecting a proposal need to be thoroughly understood.<br>
    <br>
    (more below)<br>
    <br>
    <br>
    <blockquote
      cite="mid:61AE87C2-D215-4135-94A3-6C648FAA614E@alcatel-lucent.com"
      type="cite">
      <div>
        <div>
        </div>
      </div>
      <br>
      <span id="OLK_SRC_BODY_SECTION">
        <div>
          <div bgcolor="#FFFFFF" text="#000000">
            <div class="moz-cite-prefix">
              2015-11-13, Henderickx, Wim (Wim):<br>
            </div>
            <blockquote
              cite="mid:E3917F57-B9F4-417D-9E9B-8D1330CC2506@alcatel-lucent.com"
              type="cite">
              <div>
                <div>
                  <div>Thomas, we need a solution that is implementable
                    and will scale in control/data-plane. As such the
                    solution I outline is standardised today and does
                    not need new extensions in control/data-plane. Hence
                    informational draft and can be implemented if there
                    is market demand.</div>
                </div>
              </div>
            </blockquote>
            <br>
            The above argument would fully make sense to me if support
            MPLS/MPLS/(UDP or GRE) was common place in ToRs or
            vswitches.<br>
            <br>
            <blockquote
              cite="mid:E3917F57-B9F4-417D-9E9B-8D1330CC2506@alcatel-lucent.com"
              type="cite">
              <div>
                <div>
                  <div>With respect to MAC you need to address both
                    directions and does not make sense to manage this if
                    it is not required/doe snot add value.</div>
                </div>
              </div>
            </blockquote>
            <br>
            On VXLAN and the Ethernet header: it looks to me that
            addressing both direction is just a matter of documenting in
            the draft (if not already there) what is the expected
            behavior for VXLAN/NVGRE. But VXLAN and NVGRE are not the
            only encaps proposed in the specs anyway.<br>
            <br>
            Compared to 3-label option C, my understanding is that the
            added-value is to not require the support of an
            MPLS/MPLS/(UDP or GRE) encap in ToRs and vswitches.   
            <br>
            <br>
            The right trade-off to make may in fact depend on whether
            you prefer:<br>
            (a) a new dataplane stitching behavior on DC ASBRs (the
            behavior specified in this draft)<br>
            or (b) an evolution of the encaps on the vswitches and ToRs
            to support MPLS/MPLS/(UDP or GRE)</div>
        </div>
      </span>
      <div><br>
      </div>
      <div>WH&gt; b depends on the use case </div>
    </blockquote>
    <br>
    I don't get what you mean by "b depends on the use case". <br>
    I wrote the above based on the idea that the encap used in
    MPLS/MPLS/(UDP or GRE), which hence has to be supported on the ToRs
    and vswitches.<br>
    Another possibility would be service-label/middle-label/Ethernet
    assuming an L2 adjacency between vswitches/ToRs and ASBRs, but this
    certainly does not match your typical DC architecture. Or perhaps
    had you something else in mind ?<br>
    <br>
    <blockquote
      cite="mid:61AE87C2-D215-4135-94A3-6C648FAA614E@alcatel-lucent.com"
      type="cite">
      <div>WH&gt; and depending on implementation you don’t need to
        change any of the TOR/vswitches.</div>
    </blockquote>
    <br>
    Does this mean that for some implementations you may not need to
    change any of the TOR/vswitches, but that for some others you may ?<br>
    <br>
    Let me take a practical example : while I can quite easily see how
    to implement the procedures in draft-hao-bess-inter-nvo3-vpn-optionc
    based on current vswitch implementations of VXLAN, the lack of
    MPLS/MPLS/(UDP, GRE) support in commonplace vswitches seems to me as
    making that alternate solution you suggest harder to implement.<br>
    <br>
    -Thomas<br>
    <br>
    <br>
    <br>
    <br>
    <br>
    <blockquote
      cite="mid:61AE87C2-D215-4135-94A3-6C648FAA614E@alcatel-lucent.com"
      type="cite"><span id="OLK_SRC_BODY_SECTION">
        <div>
          <div bgcolor="#FFFFFF" text="#000000">
            <br>
            <blockquote
              cite="mid:E3917F57-B9F4-417D-9E9B-8D1330CC2506@alcatel-lucent.com"
              type="cite">
              <div>
                <div>
                </div>
              </div>
              <div><br>
              </div>
              <span id="OLK_SRC_BODY_SECTION">
                <div style="font-family:Calibri; font-size:12pt;
                  text-align:left; color:black; BORDER-BOTTOM: medium
                  none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in;
                  PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP:
                  #b5c4df 1pt solid; BORDER-RIGHT: medium none;
                  PADDING-TOP: 3pt">
                  <span style="font-weight:bold">From: </span>Thomas
                  Morin &lt;<a moz-do-not-send="true"
                    class="moz-txt-link-abbreviated"
                    href="mailto:thomas.morin@orange.com">thomas.morin@orange.com</a>&gt;<br>
                  <span style="font-weight:bold">Organization: </span>Orange<br>
                  <span style="font-weight:bold">Date: </span>Friday 13
                  November 2015 at 09:57<br>
                  <span style="font-weight:bold">To: </span>Wim
                  Henderickx &lt;<a moz-do-not-send="true"
                    class="moz-txt-link-abbreviated"
                    href="mailto:wim.henderickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a>&gt;<br>
                  <span style="font-weight:bold">Cc: </span>"<a
                    moz-do-not-send="true"
                    class="moz-txt-link-abbreviated"
                    href="mailto:bess@ietf.org"><a class="moz-txt-link-abbreviated" href="mailto:bess@ietf.org">bess@ietf.org</a></a>" &lt;<a
                    moz-do-not-send="true" href="mailto:bess@ietf.org"><a class="moz-txt-link-abbreviated" href="mailto:bess@ietf.org">bess@ietf.org</a></a>&gt;<br>
                  <span style="font-weight:bold">Subject: </span>Re:
                  [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br>
                </div>
                <div><br>
                </div>
                <div>
                  <div bgcolor="#FFFFFF" text="#000000">
                    <div class="moz-cite-prefix">Hi Wim,<br>
                      <br>
                      I agree on the analysis that this proposal is
                      restricted to implementations that supports the
                      chosen encap with non-IANA ports (which may be
                      hard to achieve for instance on hardware
                      implementations, as you suggest), or to context
                      where managing multiple IPs would be operationally
                      viable.   <br>
                      <br>
                      However, it does not seem obvious to me how the
                      alternative you propose [relying on 3-label option
                      C with an MPLS/MPLS/(UDP|GRE) encap] addresses the
                      issue of whether the encap behavior is supported
                      or not (e.g. your typical ToR chipset possibly may
                      not support this kind of encap,  and even
                      software-based switches may not be ready to
                      support that today).<br>
                      <br>
                      My take is that having different options to adapt
                      to various implementations constraints we may have
                      would have value.<br>
                      <br>
                      (+ one question below on VXLAN...)<br>
                      <br>
                      -Thomas<br>
                      <br>
                      <br>
                      2015-11-12, Henderickx, Wim (Wim):<br>
                    </div>
                    <blockquote
                      cite="mid:94504E5E-B0D8-41DC-8967-E860E46F4C92@alcatel-lucent.com"
                      type="cite">
                      <span id="OLK_SRC_BODY_SECTION">
                        <div>
                          <div text="#000000" bgcolor="#FFFFFF">
                            <blockquote
                              cite="mid:31144DC0-E53C-4890-AD51-29A49C45F6DB@alcatel-lucent.com"
                              type="cite">
                              On VXLAN/NVGRE, do you challenge the fact
                              that they would be used with a dummy MAC
                              address that would be replaced by the
                              right MAC by a sender based on an ARP
                              request when needed ?<br>
                              <span id="OLK_SRC_BODY_SECTION"></span></blockquote>
                            <br>
                            Is the above the issue you had in mind about
                            VXLAN and NVGRE ?</div>
                        </div>
                      </span>
                      <div><br>
                      </div>
                      <div>WH&gt; yes</div>
                    </blockquote>
                    <br>
                    I you don't mind me asking : why do you challenge
                    that ?<br>
                    <br>
                    <br>
                  </div>
                </div>
              </span></blockquote>
            <br>
          </div>
        </div>
      </span></blockquote>
    <br>
  </body>
</html>

--------------020806020801060309080706--


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To: <bess@ietf.org>, Wim Henderickx <wim.henderickx@alcatel-lucent.com>
References: <1214F6D7-7E00-4C95-82C4-349393828A92@alcatel-lucent.com> <DD5FC8DE455C3348B94340C0AB5517334F8D8127@nkgeml501-mbs.china.huawei.com> <EFCC769D-6A4B-4EAB-9282-A31CCDD0FDB5@alcatel-lucent.com> <2691CE0099834E4A9C5044EEC662BB9D5720C748@dfweml701-chm> <A6AC72A0-FA16-4AA6-A1DA-35FA475B85C0@alcatel-lucent.com>
From: Thomas Morin <thomas.morin@orange.com>
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Wim,

Henderickx, Wim (Wim) :
> VXLAN has a dedicated UDP port and is very clear in the RFC7348

Well, having a port reserved for this use that won't be the default for 
another protocol is one thing, but that does not prevent in itself the 
same protocol to be applied on another range of ports. (Because HTTP 
specs says port 80 does not prevent the URI scheme to allow specifying 
the port in the URL)

Even reading the VXLAN (Informational) specs, we see room for 
flexibility wrt ports:

       -  Destination Port: IANA has assigned the value 4789 for the
          VXLAN UDP port, and this value SHOULD be used by default as the
          destination UDP port.  Some early implementations of VXLAN have
          used other values for the destination port.  To enable
          interoperability with these implementations, the destination
          port SHOULD be configurable.

I read "4789 SHOULD be used by default" and "SHOULD be configurable".


>
> Will write something on what I proposed when I get some time, not soon

The co-chair in me needs to ask the following question: should this call 
for adoption be kept on hold until an outline of an alternative solution 
is provided ?

-Thomas





>
> From: Lucy yong <lucy.yong@huawei.com <mailto:lucy.yong@huawei.com>>
> Date: Friday 13 November 2015 at 17:10
> To: Wim Henderickx <wim.henderickx@alcatel-lucent.com 
> <mailto:wim.henderickx@alcatel-lucent.com>>, Haoweiguo 
> <haoweiguo@huawei.com <mailto:haoweiguo@huawei.com>>
> Cc: "bess@ietf.org <mailto:bess@ietf.org>" <bess@ietf.org 
> <mailto:bess@ietf.org>>
> Subject: RE: draft-hao-bess-inter-nvo3-vpn-optionc
>
> Hi Wim,
>
> OptionC is very useful for DCI use case. In this case, multi-hop EBGP 
> redistributes VN routes between the end NVEs in source and destination 
> Ass, ASBRs do not maintain and distribute the VN routes; a tunnel is 
> built between the end NVEs in source and destination Ass for traffic 
> transport. Due to the different data planes in DC and WAN, the tunnel 
> is stitched by several segments, IP tunnels are used in DCs, and MPLS 
> tunnels are used in WAN.
>
> Traditional OptionC requires end-to-end MPLS, which may fit to some 
> DCI cases. However, there are many DCs that do not support MPLS data 
> plane. This draft is to provide the solution for this use case.
>
> Although VXLAN has UDP port number, if tunnel ingress and egress can 
> negotiate to use another UDP port for the VXLAN encapsulation, I don’t 
> see it breaks anything. Not sure if hw has this restriction either. 
> Even yes, we can consider using UDP source port for this purpose. UDP 
> source port is used for transit ECMP and filled by flow entropy, 
> tunnel egress can determine the flow entropy value and inform tunnel 
> ingress. Thus, tunnel egress (i.e. DC ASBR) can maintain UDP source 
> port and MPLS label table; when DC ASBR receives a packet from NVE, by 
> lookup the table, it gets the label for the packet, push the label on 
> the packet before sending toward WAN.
>
> Hope we together work out the solution for this valid use case and 
> like to hear any better alternative.
>
> Regards,
>
> Lucy
>
> *From:*BESS [mailto:bess-bounces@ietf.org] *On Behalf Of *Henderickx, 
> Wim (Wim)
> *Sent:* Thursday, November 12, 2015 11:00 PM
> *To:* Haoweiguo
> *Cc:* bess@ietf.org <mailto:bess@ietf.org>
> *Subject:* Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>
> The whole draft complicates any data plane we defined so far and since 
> there is simpler solutions I don’t support this proposal.
>
> Arguments have been given as to why.
>
> *From: *Haoweiguo <haoweiguo@huawei.com <mailto:haoweiguo@huawei.com>>
> *Date: *Friday 13 November 2015 at 02:44
> *To: *Wim Henderickx <wim.henderickx@alcatel-lucent.com 
> <mailto:wim.henderickx@alcatel-lucent.com>>
> *Cc: *"bess@ietf.org <mailto:bess@ietf.org>" <bess@ietf.org 
> <mailto:bess@ietf.org>>
> *Subject: *RE: draft-hao-bess-inter-nvo3-vpn-optionc
>
> Hi Wim,
>
> It is used for layer 3 VPN CE device to visit IP based overlay data 
> center network. For layer 3 traffic forwarding, the MAC address in 
> VXLAN/NVGRE is restricted only in data center inside domain. For the 
> traffic from data center inside to outside,  the inner MAC 
> address(destination MAC is ASBR-d's MAC, src MAC is NVE's MAC) in 
> VXLAN/NVGRE will be dropped at ASBR-d, only IP payload will continue 
> to be carried into MPLS network. I can emphasize this point in my 
> later version, it doesn't have much impact on the whole solution.
>
> This draft also is suitable for VXLAN-GPE and MPLSoGRE/MPLSoUDP 
> network to interconnect with MPLS VPN network. In VXLAN-GPE, it 
> supports IP in IP encapsulation, so no inner MAC concerns.
>
> Thanks,
>
> weiguo
>
> ------------------------------------------------------------------------
>
> *From:*BESS [bess-bounces@ietf.org <mailto:bess-bounces@ietf.org>] on 
> behalf of Henderickx, Wim (Wim) [wim.henderickx@alcatel-lucent.com 
> <mailto:wim.henderickx@alcatel-lucent.com>]
> *Sent:* Thursday, November 12, 2015 22:33
> *To:* bess@ietf.org <mailto:bess@ietf.org>
> *Subject:* [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>
> I don’t support the adoption of this draft as a WG. There is a major 
> flaw in this proposal:
>
> Basically the encapsulation of VXLAN/NVGRE is incompatible with MPLS 
> IP-VPNs. VXLAN/NVGRE contains a MAC address and IP-VPNs don’t. The 
> draft does not talk about any of this and introduces a lot of 
> complexity for nothing.
>
> If we want to describe a model C VPN interconnect with a IP fabric in 
> a DC I recommend to do an informational RFC that describes this using 
> VXLAN-GPE, MPLSoGRE or MPLSoUDP encapsulation and retain the E2E MPLS 
> label we defined in RFC4364.
>
>
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess


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    <div class="moz-cite-prefix">Wim,<br>
      <br>
      Henderickx, Wim (Wim) :<br>
    </div>
    <blockquote
      cite="mid:A6AC72A0-FA16-4AA6-A1DA-35FA475B85C0@alcatel-lucent.com"
      type="cite">
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      <div>
        <div>
          <div>VXLAN has a dedicated UDP port and is very clear in the
            RFC7348</div>
        </div>
      </div>
    </blockquote>
    <br>
    Well, having a port reserved for this use that won't be the default
    for another protocol is one thing, but that does not prevent in
    itself the same protocol to be applied on another range of ports.
    (Because HTTP specs says port 80 does not prevent the URI scheme to
    allow specifying the port in the URL)<br>
    <br>
    Even reading the VXLAN (Informational) specs, we see room for
    flexibility wrt ports:<br>
    <pre class="newpage">      -  Destination Port: IANA has assigned the value 4789 for the
         VXLAN UDP port, and this value SHOULD be used by default as the
         destination UDP port.  Some early implementations of VXLAN have
         used other values for the destination port.  To enable
         interoperability with these implementations, the destination
         port SHOULD be configurable.</pre>
    I read "4789 SHOULD be used by default" and "SHOULD be
    configurable".<br>
    <br>
    <br>
    <blockquote
      cite="mid:A6AC72A0-FA16-4AA6-A1DA-35FA475B85C0@alcatel-lucent.com"
      type="cite">
      <div>
        <div>
          <div><br>
          </div>
          <div>Will write something on what I proposed when I get some
            time, not soon</div>
        </div>
      </div>
    </blockquote>
    <br>
    The co-chair in me needs to ask the following question: should this
    call for adoption be kept on hold until an outline of an alternative
    solution is provided ?<br>
    <br>
    -Thomas<br>
    <br>
    <br>
    <br>
    <br>
    <br>
    <blockquote
      cite="mid:A6AC72A0-FA16-4AA6-A1DA-35FA475B85C0@alcatel-lucent.com"
      type="cite">
      <div>
        <div>
          <div>
          </div>
        </div>
      </div>
      <div><br>
      </div>
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          <span style="font-weight:bold">From: </span>Lucy yong &lt;<a
            moz-do-not-send="true" href="mailto:lucy.yong@huawei.com"><a class="moz-txt-link-abbreviated" href="mailto:lucy.yong@huawei.com">lucy.yong@huawei.com</a></a>&gt;<br>
          <span style="font-weight:bold">Date: </span>Friday 13
          November 2015 at 17:10<br>
          <span style="font-weight:bold">To: </span>Wim Henderickx &lt;<a
            moz-do-not-send="true"
            href="mailto:wim.henderickx@alcatel-lucent.com"><a class="moz-txt-link-abbreviated" href="mailto:wim.henderickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a></a>&gt;,
          Haoweiguo &lt;<a moz-do-not-send="true"
            href="mailto:haoweiguo@huawei.com">haoweiguo@huawei.com</a>&gt;<br>
          <span style="font-weight:bold">Cc: </span>"<a
            moz-do-not-send="true" href="mailto:bess@ietf.org"><a class="moz-txt-link-abbreviated" href="mailto:bess@ietf.org">bess@ietf.org</a></a>"
          &lt;<a moz-do-not-send="true" href="mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
          <span style="font-weight:bold">Subject: </span>RE:
          draft-hao-bess-inter-nvo3-vpn-optionc<br>
        </div>
        <div><br>
        </div>
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              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);">Hi Wim,<o:p></o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);">OptionC is very useful for DCI use case. In
                  this case, multi-hop EBGP redistributes VN routes
                  between the end NVEs in source and destination Ass,
                  ASBRs do not maintain and distribute the VN routes; a
                  tunnel is built between the end NVEs in source and
                  destination Ass for traffic transport. Due to the
                  different data planes in DC and WAN, the tunnel is
                  stitched by several segments, IP tunnels are used in
                  DCs, and MPLS tunnels are used in WAN.<o:p></o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);">Traditional OptionC requires end-to-end MPLS,
                  which may fit to some DCI cases. However, there are
                  many DCs that do not support MPLS data plane. This
                  draft is to provide the solution for this use case.<o:p></o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);">Although VXLAN has UDP port number, if tunnel
                  ingress and egress can negotiate to use another UDP
                  port for the VXLAN encapsulation, I don’t see it
                  breaks anything. Not sure if hw has this restriction
                  either. Even yes, we can consider using UDP source
                  port for this purpose. UDP source port is used for
                  transit ECMP and filled by flow entropy, tunnel egress
                  can determine the flow entropy value and inform tunnel
                  ingress. Thus, tunnel egress (i.e. DC ASBR) can
                  maintain UDP source port and MPLS label table; when DC
                  ASBR receives a packet from NVE, by lookup the table,
                  it gets the label for the packet, push the label on
                  the packet before sending toward WAN.
                  <o:p></o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);">Hope we together work out the solution for this
                  valid use case and like to hear any better
                  alternative.<o:p></o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);">Regards,<o:p></o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);">Lucy  <o:p></o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span style="font-size: 11pt;
                  font-family: Calibri, sans-serif; color: rgb(31, 73,
                  125);"><o:p> </o:p></span></p>
              <div>
                <div style="border:none;border-top:solid #B5C4DF
                  1.0pt;padding:3.0pt 0in 0in 0in">
                  <p class="MsoNormal"><b><span style="font-size: 10pt;
                        font-family: Tahoma, sans-serif;">From:</span></b><span
                      style="font-size: 10pt; font-family: Tahoma,
                      sans-serif;"> BESS [<a moz-do-not-send="true"
                        href="mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
                      <b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
                      <b>Sent:</b> Thursday, November 12, 2015 11:00 PM<br>
                      <b>To:</b> Haoweiguo<br>
                      <b>Cc:</b> <a moz-do-not-send="true"
                        href="mailto:bess@ietf.org">bess@ietf.org</a><br>
                      <b>Subject:</b> Re: [bess]
                      draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p></span></p>
                </div>
              </div>
              <p class="MsoNormal"><o:p> </o:p></p>
              <div>
                <div>
                  <div>
                    <p class="MsoNormal"><span style="font-size: 10.5pt;
                        font-family: Calibri, sans-serif; color: black;">The
                        whole draft complicates any data plane we
                        defined so far and since there is simpler
                        solutions I don’t support this proposal.<o:p></o:p></span></p>
                  </div>
                  <div>
                    <p class="MsoNormal"><span style="font-size: 10.5pt;
                        font-family: Calibri, sans-serif; color: black;">Arguments
                        have been given as to why.<o:p></o:p></span></p>
                  </div>
                </div>
              </div>
              <div>
                <p class="MsoNormal"><span style="font-size: 10.5pt;
                    font-family: Calibri, sans-serif; color: black;"><o:p> </o:p></span></p>
              </div>
              <div style="border:none;border-top:solid #B5C4DF
                1.0pt;padding:3.0pt 0in 0in 0in">
                <p class="MsoNormal"><b><span style="font-family:
                      Calibri, sans-serif; color: black;">From:
                    </span></b><span style="font-family: Calibri,
                    sans-serif; color: black;">Haoweiguo &lt;<a
                      moz-do-not-send="true"
                      href="mailto:haoweiguo@huawei.com"><a class="moz-txt-link-abbreviated" href="mailto:haoweiguo@huawei.com">haoweiguo@huawei.com</a></a>&gt;<br>
                    <b>Date: </b>Friday 13 November 2015 at 02:44<br>
                    <b>To: </b>Wim Henderickx &lt;<a
                      moz-do-not-send="true"
                      href="mailto:wim.henderickx@alcatel-lucent.com"><a class="moz-txt-link-abbreviated" href="mailto:wim.henderickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a></a>&gt;<br>
                    <b>Cc: </b>"<a moz-do-not-send="true"
                      href="mailto:bess@ietf.org">bess@ietf.org</a>"
                    &lt;<a moz-do-not-send="true"
                      href="mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
                    <b>Subject: </b>RE:
                    draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p></span></p>
              </div>
              <div>
                <p class="MsoNormal"><span style="font-size: 10.5pt;
                    font-family: Calibri, sans-serif; color: black;"><o:p> </o:p></span></p>
              </div>
              <div>
                <div>
                  <div>
                    <p><span style="font-family: Tahoma, sans-serif;
                        color: black;">Hi Wim,</span><span
                        style="font-size: 10pt; font-family: Tahoma,
                        sans-serif; color: black;"><o:p></o:p></span></p>
                    <p><span style="font-family: Tahoma, sans-serif;
                        color: black;">It is used for layer 3 VPN CE
                        device to visit IP based overlay data center
                        network. For layer 3 traffic forwarding, the MAC
                        address in VXLAN/NVGRE is restricted only in
                        data center inside domain. For the traffic from
                        data center inside to outside,  the inner MAC
                        address(destination MAC is ASBR-d's MAC, src MAC
                        is NVE's MAC) in VXLAN/NVGRE will be dropped at
                        ASBR-d, only IP payload will continue to be
                        carried into MPLS network. I can emphasize this
                        point in my later version, it doesn't have much
                        impact on the whole solution.</span><span
                        style="font-size: 10pt; font-family: Tahoma,
                        sans-serif; color: black;"><o:p></o:p></span></p>
                    <p><span style="font-family: Tahoma, sans-serif;
                        color: black;">This draft also is suitable for
                        VXLAN-GPE and MPLSoGRE/MPLSoUDP network to
                        interconnect with MPLS VPN network. In
                        VXLAN-GPE, it supports IP in IP encapsulation,
                        so no inner MAC concerns.</span><span
                        style="font-size: 10pt; font-family: Tahoma,
                        sans-serif; color: black;"><o:p></o:p></span></p>
                    <p><span style="font-size: 10pt; font-family:
                        Tahoma, sans-serif; color: black;"> <o:p></o:p></span></p>
                    <p><span style="font-family: Tahoma, sans-serif;
                        color: black;">Thanks,</span><span
                        style="font-size: 10pt; font-family: Tahoma,
                        sans-serif; color: black;"><o:p></o:p></span></p>
                    <p><span style="font-family: Tahoma, sans-serif;
                        color: black;">weiguo</span><span
                        style="font-size: 10pt; font-family: Tahoma,
                        sans-serif; color: black;"><o:p></o:p></span></p>
                    <div class="MsoNormal" style="text-align:center"
                      align="center"><span style="font-size: 10pt;
                        font-family: Tahoma, sans-serif; color: black;">
                        <hr size="2" width="100%" align="center">
                      </span></div>
                    <div>
                      <div id="divRpF838565">
                        <p class="MsoNormal"
                          style="margin-bottom:12.0pt"><b><span
                              style="font-size: 10pt; font-family:
                              Tahoma, sans-serif; color: black;">From:</span></b><span
                            style="font-size: 10pt; font-family: Tahoma,
                            sans-serif; color: black;"> BESS [<a
                              moz-do-not-send="true"
                              href="mailto:bess-bounces@ietf.org"><a class="moz-txt-link-abbreviated" href="mailto:bess-bounces@ietf.org">bess-bounces@ietf.org</a></a>]
                            on behalf of Henderickx, Wim (Wim) [<a
                              moz-do-not-send="true"
                              href="mailto:wim.henderickx@alcatel-lucent.com"><a class="moz-txt-link-abbreviated" href="mailto:wim.henderickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a></a>]<br>
                            <b>Sent:</b> Thursday, November 12, 2015
                            22:33<br>
                            <b>To:</b> <a moz-do-not-send="true"
                              href="mailto:bess@ietf.org">bess@ietf.org</a><br>
                            <b>Subject:</b> [bess]
                            draft-hao-bess-inter-nvo3-vpn-optionc</span><span
                            style="color:black"><o:p></o:p></span></p>
                      </div>
                      <div>
                        <div>
                          <div>
                            <p class="MsoNormal"><span
                                style="font-size:9.0pt;font-family:Consolas;color:black">I
                                don’t support the adoption of this draft
                                as a WG. There is a major flaw in this
                                proposal:<o:p></o:p></span></p>
                          </div>
                          <div>
                            <p class="MsoNormal"><span
                                style="font-size:9.0pt;font-family:Consolas;color:black">Basically
                                the encapsulation of VXLAN/NVGRE is
                                incompatible with MPLS IP-VPNs.
                                VXLAN/NVGRE contains a MAC address and
                                IP-VPNs don’t. The draft does not talk
                                about any of this and introduces a lot
                                of complexity for nothing.<o:p></o:p></span></p>
                          </div>
                          <div>
                            <p class="MsoNormal"><span
                                style="font-size:9.0pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
                          </div>
                          <div>
                            <p class="MsoNormal"><span
                                style="font-size:9.0pt;font-family:Consolas;color:black">If
                                we want to describe a model C VPN
                                interconnect with a IP fabric in a DC I
                                recommend to do an informational RFC
                                that describes this using VXLAN-GPE,
                                MPLSoGRE or MPLSoUDP encapsulation and
                                retain the E2E MPLS label we defined in
                                RFC4364.<o:p></o:p></span></p>
                          </div>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>
      </span>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
BESS mailing list
<a class="moz-txt-link-abbreviated" href="mailto:BESS@ietf.org">BESS@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/bess">https://www.ietf.org/mailman/listinfo/bess</a>
</pre>
    </blockquote>
    <br>
  </body>
</html>

--------------010303000101040104060701--


From nobody Mon Nov 16 07:54:48 2015
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From: Thomas Morin <thomas.morin@orange.com>
Organization: Orange
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Date: Mon, 16 Nov 2015 16:54:44 +0100
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Lucy Yong :
> [Lucy1] Is this one?  “If we want to describe a model C VPN 
> interconnect with a IP fabric in a DC I recommend to do an 
> informational RFC that describes this using VXLAN-GPE, MPLSoGRE or 
> MPLSoUDP encapsulation and retain the E2E MPLS label we defined in 
> RFC4364.”
>
> If yes, you suggest NVE to implement MPLSoGRE or MPLSoUDP, to support 
> VXLAN-GPE for L3 payload. First of all, using MPLSoGRE or MPLSoUDP for 
> this case, requires three labels + GRE/UDP tunnel, huge overhead is 
> introduced here. This is very complex in my opinion. Our solution can 
> apply VXLAN-GRE encap. and also support MPLSoX encap (5.1.1 and 
> 5.1.2). BTW, this may be not what you suggested.

I don't think Wim mentioned 3-labels over UDP or GRE.
Wim proposal works with 2-labels over an IP encap (the topmost label of 
the typical 3-label option C being replaced by an IP transport).

> WH> it is less bits then you proposal and no changes in any CP/DP that 
> is standardised today. Where is the complexity? Works today and is 
> deployed in many networks
>
> [Lucy2] This is not compliant with many DCs’ architecture as Thomas 
> pointed out.

( Note that I merely mentioned the problem of vswitch/ToR support for 
MPLS/MPLS/(UDP or GRE), but had mentioned nothing about overall DC 
architecture.  )

-Thomas



> *From: *Lucy yong <lucy.yong@huawei.com <mailto:lucy.yong@huawei.com>>
> *Date: *Friday 13 November 2015 at 17:10
> *To: *Wim Henderickx <wim.henderickx@alcatel-lucent.com 
> <mailto:wim.henderickx@alcatel-lucent.com>>, Haoweiguo 
> <haoweiguo@huawei.com <mailto:haoweiguo@huawei.com>>
> *Cc: *"bess@ietf.org <mailto:bess@ietf.org>" <bess@ietf.org 
> <mailto:bess@ietf.org>>
> *Subject: *RE: draft-hao-bess-inter-nvo3-vpn-optionc
>
> Hi Wim,
>
> OptionC is very useful for DCI use case. In this case, multi-hop EBGP 
> redistributes VN routes between the end NVEs in source and destination 
> Ass, ASBRs do not maintain and distribute the VN routes; a tunnel is 
> built between the end NVEs in source and destination Ass for traffic 
> transport. Due to the different data planes in DC and WAN, the tunnel 
> is stitched by several segments, IP tunnels are used in DCs, and MPLS 
> tunnels are used in WAN.
>
> Traditional OptionC requires end-to-end MPLS, which may fit to some 
> DCI cases. However, there are many DCs that do not support MPLS data 
> plane. This draft is to provide the solution for this use case.
>
> Although VXLAN has UDP port number, if tunnel ingress and egress can 
> negotiate to use another UDP port for the VXLAN encapsulation, I don’t 
> see it breaks anything. Not sure if hw has this restriction either. 
> Even yes, we can consider using UDP source port for this purpose. UDP 
> source port is used for transit ECMP and filled by flow entropy, 
> tunnel egress can determine the flow entropy value and inform tunnel 
> ingress. Thus, tunnel egress (i.e. DC ASBR) can maintain UDP source 
> port and MPLS label table; when DC ASBR receives a packet from NVE, by 
> lookup the table, it gets the label for the packet, push the label on 
> the packet before sending toward WAN.
>
> Hope we together work out the solution for this valid use case and 
> like to hear any better alternative.
>
> Regards,
>
> Lucy
>
> *From:*BESS [mailto:bess-bounces@ietf.org] *On Behalf Of *Henderickx, 
> Wim (Wim)
> *Sent:* Thursday, November 12, 2015 11:00 PM
> *To:* Haoweiguo
> *Cc:* bess@ietf.org <mailto:bess@ietf.org>
> *Subject:* Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>
> The whole draft complicates any data plane we defined so far and since 
> there is simpler solutions I don’t support this proposal.
>
> Arguments have been given as to why.
>
> *From: *Haoweiguo <haoweiguo@huawei.com <mailto:haoweiguo@huawei.com>>
> *Date: *Friday 13 November 2015 at 02:44
> *To: *Wim Henderickx <wim.henderickx@alcatel-lucent.com 
> <mailto:wim.henderickx@alcatel-lucent.com>>
> *Cc: *"bess@ietf.org <mailto:bess@ietf.org>" <bess@ietf.org 
> <mailto:bess@ietf.org>>
> *Subject: *RE: draft-hao-bess-inter-nvo3-vpn-optionc
>
> Hi Wim,
>
> It is used for layer 3 VPN CE device to visit IP based overlay data 
> center network. For layer 3 traffic forwarding, the MAC address in 
> VXLAN/NVGRE is restricted only in data center inside domain. For the 
> traffic from data center inside to outside,  the inner MAC 
> address(destination MAC is ASBR-d's MAC, src MAC is NVE's MAC) in 
> VXLAN/NVGRE will be dropped at ASBR-d, only IP payload will continue 
> to be carried into MPLS network. I can emphasize this point in my 
> later version, it doesn't have much impact on the whole solution.
>
> This draft also is suitable for VXLAN-GPE and MPLSoGRE/MPLSoUDP 
> network to interconnect with MPLS VPN network. In VXLAN-GPE, it 
> supports IP in IP encapsulation, so no inner MAC concerns.
>
> Thanks,
>
> weiguo
>
> ------------------------------------------------------------------------
>
> *From:*BESS [bess-bounces@ietf.org <mailto:bess-bounces@ietf.org>] on 
> behalf of Henderickx, Wim (Wim) [wim.henderickx@alcatel-lucent.com 
> <mailto:wim.henderickx@alcatel-lucent.com>]
> *Sent:* Thursday, November 12, 2015 22:33
> *To:* bess@ietf.org <mailto:bess@ietf.org>
> *Subject:* [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>
> I don’t support the adoption of this draft as a WG. There is a major 
> flaw in this proposal:
>
> Basically the encapsulation of VXLAN/NVGRE is incompatible with MPLS 
> IP-VPNs. VXLAN/NVGRE contains a MAC address and IP-VPNs don’t. The 
> draft does not talk about any of this and introduces a lot of 
> complexity for nothing.
>
> If we want to describe a model C VPN interconnect with a IP fabric in 
> a DC I recommend to do an informational RFC that describes this using 
> VXLAN-GPE, MPLSoGRE or MPLSoUDP encapsulation and retain the E2E MPLS 
> label we defined in RFC4364.
>
>
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess


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From: Haoweiguo <haoweiguo@huawei.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, Thomas Morin <thomas.morin@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Date: Tue, 17 Nov 2015 08:12:12 +0000
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Hi Wim,

WH> I first want to understand the requirements for this use case and I don=
=92t agree to adoption since there are major DP implications in this.
[weiguo]: You proposed MPLS over GRE/UDP encapsulation for the traffic betw=
een data center inside and outside MPLS VPN network. However, for some TOR =
switches, they don't support MPLS Over GRE/UDP. Even if they support, they =
rely on internal loop and the forwarding performance will be reduced half. =
 For option-c scenario, TOR switches need to realize MPLS+MPLS+GRE/UDP, it'=
s more complicated for TOR switches. Current most of the TOR switches suppo=
rt VXLAN encapsulation and have no half forwarding performance issue.  For =
ASBR-d, it is router device in most case, it has capability to realize more=
 comlicated forwarding behavior.

Thanks,
weiguo
________________________________
From: BESS [bess-bounces@ietf.org] on behalf of Henderickx, Wim (Wim) [wim.=
henderickx@alcatel-lucent.com]
Sent: Tuesday, November 17, 2015 0:52
To: Thomas Morin; bess@ietf.org
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

In-line

From: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderic=
kx@alcatel-lucent.com>>
Date: Monday 16 November 2015 at 08:29
To: Thomas Morin <thomas.morin@orange.com<mailto:thomas.morin@orange.com>>,=
 "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.org>=
>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc



From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of Thomas Morin <thomas.morin@orange.com<mailto:thomas.morin@orange.com>>
Organization: Orange
Date: Monday 16 November 2015 at 07:47
To: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>, Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderic=
kx@alcatel-lucent.com>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Wim,

Henderickx, Wim (Wim) :
VXLAN has a dedicated UDP port and is very clear in the RFC7348

Well, having a port reserved for this use that won't be the default for ano=
ther protocol is one thing, but that does not prevent in itself the same pr=
otocol to be applied on another range of ports. (Because HTTP specs says po=
rt 80 does not prevent the URI scheme to allow specifying the port in the U=
RL)

Even reading the VXLAN (Informational) specs, we see room for flexibility w=
rt ports:

      -  Destination Port: IANA has assigned the value 4789 for the
         VXLAN UDP port, and this value SHOULD be used by default as the
         destination UDP port.  Some early implementations of VXLAN have
         used other values for the destination port.  To enable
         interoperability with these implementations, the destination
         port SHOULD be configurable.

I read "4789 SHOULD be used by default" and "SHOULD be configurable".

WH> true but it does not say to use multiple at the same time. My read on t=
his is that it allows a non standard port to be used, but not multiple at t=
he same time.




Will write something on what I proposed when I get some time, not soon

The co-chair in me needs to ask the following question: should this call fo=
r adoption be kept on hold until an outline of an alternative solution is p=
rovided ?

WH> I first want to understand the requirements for this use case and I don=
=92t agree to adoption since there are major DP implications in this.


-Thomas






From: Lucy yong <<mailto:lucy.yong@huawei.com>lucy.yong@huawei.com<mailto:l=
ucy.yong@huawei.com>>
Date: Friday 13 November 2015 at 17:10
To: Wim Henderickx <<mailto:wim.henderickx@alcatel-lucent.com>wim.henderick=
x@alcatel-lucent.com<mailto:wim.henderickx@alcatel-lucent.com>>, Haoweiguo =
<haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>
Cc: "<mailto:bess@ietf.org>bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.=
org<mailto:bess@ietf.org>>
Subject: RE: draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim,

OptionC is very useful for DCI use case. In this case, multi-hop EBGP redis=
tributes VN routes between the end NVEs in source and destination Ass, ASBR=
s do not maintain and distribute the VN routes; a tunnel is built between t=
he end NVEs in source and destination Ass for traffic transport. Due to the=
 different data planes in DC and WAN, the tunnel is stitched by several seg=
ments, IP tunnels are used in DCs, and MPLS tunnels are used in WAN.

Traditional OptionC requires end-to-end MPLS, which may fit to some DCI cas=
es. However, there are many DCs that do not support MPLS data plane. This d=
raft is to provide the solution for this use case.

Although VXLAN has UDP port number, if tunnel ingress and egress can negoti=
ate to use another UDP port for the VXLAN encapsulation, I don=92t see it b=
reaks anything. Not sure if hw has this restriction either. Even yes, we ca=
n consider using UDP source port for this purpose. UDP source port is used =
for transit ECMP and filled by flow entropy, tunnel egress can determine th=
e flow entropy value and inform tunnel ingress. Thus, tunnel egress (i.e. D=
C ASBR) can maintain UDP source port and MPLS label table; when DC ASBR rec=
eives a packet from NVE, by lookup the table, it gets the label for the pac=
ket, push the label on the packet before sending toward WAN.

Hope we together work out the solution for this valid use case and like to =
hear any better alternative.

Regards,
Lucy





From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Thursday, November 12, 2015 11:00 PM
To: Haoweiguo
Cc: bess@ietf.org<mailto:bess@ietf.org>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

The whole draft complicates any data plane we defined so far and since ther=
e is simpler solutions I don=92t support this proposal.
Arguments have been given as to why.

From: Haoweiguo <<mailto:haoweiguo@huawei.com>haoweiguo@huawei.com<mailto:h=
aoweiguo@huawei.com>>
Date: Friday 13 November 2015 at 02:44
To: Wim Henderickx <<mailto:wim.henderickx@alcatel-lucent.com>wim.henderick=
x@alcatel-lucent.com<mailto:wim.henderickx@alcatel-lucent.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: RE: draft-hao-bess-inter-nvo3-vpn-optionc


Hi Wim,

It is used for layer 3 VPN CE device to visit IP based overlay data center =
network. For layer 3 traffic forwarding, the MAC address in VXLAN/NVGRE is =
restricted only in data center inside domain. For the traffic from data cen=
ter inside to outside,  the inner MAC address(destination MAC is ASBR-d's M=
AC, src MAC is NVE's MAC) in VXLAN/NVGRE will be dropped at ASBR-d, only IP=
 payload will continue to be carried into MPLS network. I can emphasize thi=
s point in my later version, it doesn't have much impact on the whole solut=
ion.

This draft also is suitable for VXLAN-GPE and MPLSoGRE/MPLSoUDP network to =
interconnect with MPLS VPN network. In VXLAN-GPE, it supports IP in IP enca=
psulation, so no inner MAC concerns.



Thanks,

weiguo

________________________________
From: BESS [<mailto:bess-bounces@ietf.org>bess-bounces@ietf.org<mailto:bess=
-bounces@ietf.org>] on behalf of Henderickx, Wim (Wim) [<mailto:wim.henderi=
ckx@alcatel-lucent.com>wim.henderickx@alcatel-lucent.com<mailto:wim.henderi=
ckx@alcatel-lucent.com>]
Sent: Thursday, November 12, 2015 22:33
To: bess@ietf.org<mailto:bess@ietf.org>
Subject: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
I don=92t support the adoption of this draft as a WG. There is a major flaw=
 in this proposal:
Basically the encapsulation of VXLAN/NVGRE is incompatible with MPLS IP-VPN=
s. VXLAN/NVGRE contains a MAC address and IP-VPNs don=92t. The draft does n=
ot talk about any of this and introduces a lot of complexity for nothing.

If we want to describe a model C VPN interconnect with a IP fabric in a DC =
I recommend to do an informational RFC that describes this using VXLAN-GPE,=
 MPLSoGRE or MPLSoUDP encapsulation and retain the E2E MPLS label we define=
d in RFC4364.



_______________________________________________
BESS mailing list
BESS@ietf.org<mailto:BESS@ietf.org>https://www.ietf.org/mailman/listinfo/be=
ss


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<p><font size=3D"3">Hi Wim,</font></p>
<font size=3D"3">
<div>WH&gt; I first want to understand the requirements for this use case a=
nd I don=92t agree to adoption since there are major DP implications in thi=
s.&nbsp;</div>
<div>[weiguo]: You proposed MPLS over GRE/UDP encapsulation for the traffic=
 between data center inside and outside MPLS VPN network. However, for some=
 TOR switches, they don't support MPLS Over GRE/UDP. Even if they support, =
they rely on internal loop and the
 forwarding performance will be reduced half.&nbsp; For option-c scenario, =
TOR switches need to realize MPLS&#43;MPLS&#43;GRE/UDP, it's more complicat=
ed for TOR switches. Current most of the TOR switches support VXLAN encapsu=
lation and have no half forwarding performance
 issue.&nbsp; For ASBR-d, it is router device in most case, it has capabili=
ty to realize more comlicated forwarding behavior.</div>
<div>&nbsp;</div>
<div>Thanks,</div>
<div>weiguo</div>
</font>
<div style=3D"FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px=
">
<hr tabindex=3D"-1">
<div style=3D"DIRECTION: ltr" id=3D"divRpF483179"><font color=3D"#000000" s=
ize=3D"2" face=3D"Tahoma"><b>From:</b> BESS [bess-bounces@ietf.org] on beha=
lf of Henderickx, Wim (Wim) [wim.henderickx@alcatel-lucent.com]<br>
<b>Sent:</b> Tuesday, November 17, 2015 0:52<br>
<b>To:</b> Thomas Morin; bess@ietf.org<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br>
</font><br>
</div>
<div></div>
<div>
<div>
<div>
<div>In-line</div>
<div>
<div id=3D"MAC_OUTLOOK_SIGNATURE"></div>
</div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"BORDER-BOTTOM: medium none; TEXT-ALIGN: left; BORDER-LEFT: me=
dium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; FONT=
-FAMILY: Calibri; COLOR: black; FONT-SIZE: 12pt; BORDER-TOP: #b5c4df 1pt so=
lid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"FONT-WEIGHT: bold">From: </span>Wim Henderickx &lt;<a href=
=3D"mailto:wim.henderickx@alcatel-lucent.com" target=3D"_blank">wim.henderi=
ckx@alcatel-lucent.com</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Date: </span>Monday 16 November 2015 at 0=
8:29<br>
<span style=3D"FONT-WEIGHT: bold">To: </span>Thomas Morin &lt;<a href=3D"ma=
ilto:thomas.morin@orange.com" target=3D"_blank">thomas.morin@orange.com</a>=
&gt;, &quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@iet=
f.org</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Subject: </span>Re: [bess] draft-hao-bess=
-inter-nvo3-vpn-optionc<br>
</div>
<div><br>
</div>
<div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; WORD-WRAP: break-word; COLOR=
: rgb(0,0,0); FONT-SIZE: 14px">
<div>
<div>
<div><br>
</div>
<div>
<div></div>
</div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"BORDER-BOTTOM: medium none; TEXT-ALIGN: left; BORDER-LEFT: me=
dium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; FONT=
-FAMILY: Calibri; COLOR: black; FONT-SIZE: 12pt; BORDER-TOP: #b5c4df 1pt so=
lid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"FONT-WEIGHT: bold">From: </span>BESS &lt;<a href=3D"mailto:b=
ess-bounces@ietf.org" target=3D"_blank">bess-bounces@ietf.org</a>&gt; on be=
half of Thomas Morin &lt;<a href=3D"mailto:thomas.morin@orange.com" target=
=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Organization: </span>Orange<br>
<span style=3D"FONT-WEIGHT: bold">Date: </span>Monday 16 November 2015 at 0=
7:47<br>
<span style=3D"FONT-WEIGHT: bold">To: </span>&quot;<a href=3D"mailto:bess@i=
etf.org" target=3D"_blank">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:be=
ss@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;, Wim Henderickx &lt;<a=
 href=3D"mailto:wim.henderickx@alcatel-lucent.com" target=3D"_blank">wim.he=
nderickx@alcatel-lucent.com</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Subject: </span>Re: [bess] draft-hao-bess=
-inter-nvo3-vpn-optionc<br>
</div>
<div><br>
</div>
<div>
<div bgcolor=3D"#FFFFFF">
<div class=3D"moz-cite-prefix">Wim,<br>
<br>
Henderickx, Wim (Wim) :<br>
</div>
<blockquote type=3D"cite">
<div>
<div>
<div>VXLAN has a dedicated UDP port and is very clear in the RFC7348</div>
</div>
</div>
</blockquote>
<br>
Well, having a port reserved for this use that won't be the default for ano=
ther protocol is one thing, but that does not prevent in itself the same pr=
otocol to be applied on another range of ports. (Because HTTP specs says po=
rt 80 does not prevent the URI scheme
 to allow specifying the port in the URL)<br>
<br>
Even reading the VXLAN (Informational) specs, we see room for flexibility w=
rt ports:<br>
<pre class=3D"newpage">      -  Destination Port: IANA has assigned the val=
ue 4789 for the
         VXLAN UDP port, and this value SHOULD be used by default as the
         destination UDP port.  Some early implementations of VXLAN have
         used other values for the destination port.  To enable
         interoperability with these implementations, the destination
         port SHOULD be configurable.</pre>
I read &quot;4789 SHOULD be used by default&quot; and &quot;SHOULD be confi=
gurable&quot;.</div>
</div>
</span></div>
</div>
</span>
<div><br>
</div>
<div>WH&gt; true but it does not say to use multiple at the same time. My r=
ead on this is that it allows a non standard port to be used, but not multi=
ple at the same time.</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; WORD-WRAP: break-word; COLOR=
: rgb(0,0,0); FONT-SIZE: 14px">
<span id=3D"OLK_SRC_BODY_SECTION">
<div>
<div bgcolor=3D"#FFFFFF"><br>
<br>
<br>
<blockquote type=3D"cite">
<div>
<div>
<div><br>
</div>
<div>Will write something on what I proposed when I get some time, not soon=
</div>
</div>
</div>
</blockquote>
<br>
The co-chair in me needs to ask the following question: should this call fo=
r adoption be kept on hold until an outline of an alternative solution is p=
rovided ?</div>
</div>
</span></div>
</div>
</span>
<div><br>
</div>
<div>WH&gt; I first want to understand the requirements for this use case a=
nd I don=92t agree to adoption since there are major DP implications in thi=
s.&nbsp;</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div>
<div style=3D"FONT-FAMILY: Calibri,sans-serif; WORD-WRAP: break-word; COLOR=
: rgb(0,0,0); FONT-SIZE: 14px">
<span id=3D"OLK_SRC_BODY_SECTION">
<div>
<div bgcolor=3D"#FFFFFF"><br>
<br>
-Thomas<br>
<br>
<br>
<br>
<br>
<br>
<blockquote type=3D"cite">
<div>
<div>
<div></div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"BORDER-BOTTOM: medium none; TEXT-ALIGN: left; BORDER-LEFT: me=
dium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; FONT=
-FAMILY: Calibri; COLOR: black; FONT-SIZE: 12pt; BORDER-TOP: #b5c4df 1pt so=
lid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"FONT-WEIGHT: bold">From: </span>Lucy yong &lt;<a href=3D"mai=
lto:lucy.yong@huawei.com" target=3D"_blank"></a><a class=3D"moz-txt-link-ab=
breviated" href=3D"mailto:lucy.yong@huawei.com" target=3D"_blank">lucy.yong=
@huawei.com</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Date: </span>Friday 13 November 2015 at 1=
7:10<br>
<span style=3D"FONT-WEIGHT: bold">To: </span>Wim Henderickx &lt;<a href=3D"=
mailto:wim.henderickx@alcatel-lucent.com" target=3D"_blank"></a><a class=3D=
"moz-txt-link-abbreviated" href=3D"mailto:wim.henderickx@alcatel-lucent.com=
" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;,
 Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com" target=3D"_blank">ha=
oweiguo@huawei.com</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Cc: </span>&quot;<a href=3D"mailto:bess@i=
etf.org" target=3D"_blank"></a><a class=3D"moz-txt-link-abbreviated" href=
=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org</a>&quot; &lt;<a =
href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Subject: </span>RE: draft-hao-bess-inter-=
nvo3-vpn-optionc<br>
</div>
<div><br>
</div>
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt">Hi Wim,</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt">OptionC is very useful for DCI use case=
. In this case, multi-hop EBGP redistributes VN routes between the end NVEs=
 in source and destination Ass, ASBRs
 do not maintain and distribute the VN routes; a tunnel is built between th=
e end NVEs in source and destination Ass for traffic transport. Due to the =
different data planes in DC and WAN, the tunnel is stitched by several segm=
ents, IP tunnels are used in DCs,
 and MPLS tunnels are used in WAN.</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt">Traditional OptionC requires end-to-end=
 MPLS, which may fit to some DCI cases. However, there are many DCs that do=
 not support MPLS data plane. This draft
 is to provide the solution for this use case.</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt">Although VXLAN has UDP port number, if =
tunnel ingress and egress can negotiate to use another UDP port for the VXL=
AN encapsulation, I don=92t see it breaks
 anything. Not sure if hw has this restriction either. Even yes, we can con=
sider using UDP source port for this purpose. UDP source port is used for t=
ransit ECMP and filled by flow entropy, tunnel egress can determine the flo=
w entropy value and inform tunnel
 ingress. Thus, tunnel egress (i.e. DC ASBR) can maintain UDP source port a=
nd MPLS label table; when DC ASBR receives a packet from NVE, by lookup the=
 table, it gets the label for the packet, push the label on the packet befo=
re sending toward WAN.
</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt">Hope we together work out the solution =
for this valid use case and like to hear any better alternative.</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt">Regards,</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt">Lucy &nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: rgb(31,73,125); FONT-SIZE: 11pt"></span>&nbsp;</p>
<div>
<div style=3D"BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING=
-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1p=
t solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<p class=3D"MsoNormal"><b><span style=3D"FONT-FAMILY: Tahoma,sans-serif; FO=
NT-SIZE: 10pt">From:</span></b><span style=3D"FONT-FAMILY: Tahoma,sans-seri=
f; FONT-SIZE: 10pt"> BESS [<a href=3D"mailto:bess-bounces@ietf.org" target=
=3D"_blank">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
<b>Sent:</b> Thursday, November 12, 2015 11:00 PM<br>
<b>To:</b> Haoweiguo<br>
<b>Cc:</b> <a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org=
</a><br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: black; FONT-SIZE: 10.5pt">The whole draft complicates any data plane we =
defined so far and since there is simpler solutions I don=92t support this =
proposal.</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: black; FONT-SIZE: 10.5pt">Arguments have been given as to why.</span></p=
>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div style=3D"BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING=
-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1p=
t solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<p class=3D"MsoNormal"><b><span style=3D"FONT-FAMILY: Calibri,sans-serif; C=
OLOR: black">From:
</span></b><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLOR: black">Ha=
oweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com" target=3D"_blank"></a><=
a class=3D"moz-txt-link-abbreviated" href=3D"mailto:haoweiguo@huawei.com" t=
arget=3D"_blank">haoweiguo@huawei.com</a>&gt;<br>
<b>Date: </b>Friday 13 November 2015 at 02:44<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank"></a><a class=3D"moz-txt-link-abbreviated" href=3D=
"mailto:wim.henderickx@alcatel-lucent.com" target=3D"_blank">wim.henderickx=
@alcatel-lucent.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>RE: draft-hao-bess-inter-nvo3-vpn-optionc</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Calibri,sans-serif; COLO=
R: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div>
<div>
<div>
<p><span style=3D"FONT-FAMILY: Tahoma,sans-serif; COLOR: black">Hi Wim,</sp=
an><span style=3D"FONT-FAMILY: Tahoma,sans-serif; COLOR: black; FONT-SIZE: =
10pt"></span></p>
<p><span style=3D"FONT-FAMILY: Tahoma,sans-serif; COLOR: black">It is used =
for layer 3 VPN CE device to visit IP based overlay data center network. Fo=
r layer 3 traffic forwarding, the MAC address in VXLAN/NVGRE is restricted =
only in data center inside domain.
 For the traffic from data center inside to outside,&nbsp; the inner MAC ad=
dress(destination MAC is ASBR-d's MAC, src MAC is NVE's MAC) in VXLAN/NVGRE=
 will be dropped at ASBR-d, only IP payload will continue to be carried int=
o MPLS network. I can emphasize this
 point in my later version, it doesn't have much impact on the whole soluti=
on.</span><span style=3D"FONT-FAMILY: Tahoma,sans-serif; COLOR: black; FONT=
-SIZE: 10pt"></span></p>
<p><span style=3D"FONT-FAMILY: Tahoma,sans-serif; COLOR: black">This draft =
also is suitable for VXLAN-GPE and MPLSoGRE/MPLSoUDP network to interconnec=
t with MPLS VPN network. In VXLAN-GPE, it supports IP in IP encapsulation, =
so no inner MAC concerns.</span><span style=3D"FONT-FAMILY: Tahoma,sans-ser=
if; COLOR: black; FONT-SIZE: 10pt"></span></p>
<p><span style=3D"FONT-FAMILY: Tahoma,sans-serif; COLOR: black; FONT-SIZE: =
10pt"></span>&nbsp;</p>
<p><span style=3D"FONT-FAMILY: Tahoma,sans-serif; COLOR: black">Thanks,</sp=
an><span style=3D"FONT-FAMILY: Tahoma,sans-serif; COLOR: black; FONT-SIZE: =
10pt"></span></p>
<p><span style=3D"FONT-FAMILY: Tahoma,sans-serif; COLOR: black">weiguo</spa=
n><span style=3D"FONT-FAMILY: Tahoma,sans-serif; COLOR: black; FONT-SIZE: 1=
0pt"></span></p>
<div style=3D"TEXT-ALIGN: center" class=3D"MsoNormal" align=3D"center"><spa=
n style=3D"FONT-FAMILY: Tahoma,sans-serif; COLOR: black; FONT-SIZE: 10pt">
<hr align=3D"center" size=3D"2" width=3D"100%">
</span></div>
<div>
<div id=3D"divRpF838565">
<p style=3D"MARGIN-BOTTOM: 12pt" class=3D"MsoNormal"><b><span style=3D"FONT=
-FAMILY: Tahoma,sans-serif; COLOR: black; FONT-SIZE: 10pt">From:</span></b>=
<span style=3D"FONT-FAMILY: Tahoma,sans-serif; COLOR: black; FONT-SIZE: 10p=
t"> BESS [<a href=3D"mailto:bess-bounces@ietf.org" target=3D"_blank"></a><a=
 class=3D"moz-txt-link-abbreviated" href=3D"mailto:bess-bounces@ietf.org" t=
arget=3D"_blank">bess-bounces@ietf.org</a>]
 on behalf of Henderickx, Wim (Wim) [<a href=3D"mailto:wim.henderickx@alcat=
el-lucent.com" target=3D"_blank"></a><a class=3D"moz-txt-link-abbreviated" =
href=3D"mailto:wim.henderickx@alcatel-lucent.com" target=3D"_blank">wim.hen=
derickx@alcatel-lucent.com</a>]<br>
<b>Sent:</b> Thursday, November 12, 2015 22:33<br>
<b>To:</b> <a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org=
</a><br>
<b>Subject:</b> [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><span st=
yle=3D"COLOR: black"></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Consolas; COLOR: black; =
FONT-SIZE: 9pt">I don=92t support the adoption of this draft as a WG. There=
 is a major flaw in this proposal:</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Consolas; COLOR: black; =
FONT-SIZE: 9pt">Basically the encapsulation of VXLAN/NVGRE is incompatible =
with MPLS IP-VPNs. VXLAN/NVGRE contains a MAC address and IP-VPNs don=92t. =
The draft does not talk about any of this
 and introduces a lot of complexity for nothing.</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Consolas; COLOR: black; =
FONT-SIZE: 9pt"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: Consolas; COLOR: black; =
FONT-SIZE: 9pt">If we want to describe a model C VPN interconnect with a IP=
 fabric in a DC I recommend to do an informational RFC that describes this =
using VXLAN-GPE, MPLSoGRE or MPLSoUDP
 encapsulation and retain the E2E MPLS label we defined in RFC4364.</span><=
/p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</span><br>
<fieldset class=3D"mimeAttachmentHeader" target=3D"_blank"></fieldset> <br>
<pre>_______________________________________________
BESS mailing list
<a class=3D"moz-txt-link-abbreviated" href=3D"mailto:BESS@ietf.org" target=
=3D"_blank">BESS@ietf.org</a><a class=3D"moz-txt-link-freetext" href=3D"htt=
ps://www.ietf.org/mailman/listinfo/bess" target=3D"_blank">https://www.ietf=
.org/mailman/listinfo/bess</a></pre>
</blockquote>
<br>
</div>
</div>
</span></div>
</div>
</span></div>
</div>
</div>
</body>
</html>

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From: <thomas.morin@orange.com>
Organization: Orange
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com>, BESS <bess@ietf.org>
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Hi Wim, WG,

2015-11-16, Henderickx, Wim (Wim):
>
> 2015-11-13, Henderickx, Wim (Wim):
>> Thomas, we can discuss forever and someone need to describe 
>> requirements, but the current proposal I cannot agree to for the 
>> reasons explained.
>
> TM> Well, although discussing forever is certainly not the goal, the 
> reasons for rejecting a proposal need to be thoroughly understood.
> WH> my point is what is the real driver for supporting a plain VXLAN 
> data-plane here, the use cases I have seen in this txt is always where 
> an application behind a NVE/TOR is demanding option c, but none of the 
> NVE/TOR elements.
>

My understanding is that the applications  are contexts where overlays 
are present is when workloads (VMs or baremetal) need to be 
interconnected with VPNs. In these contexts, there can be reasons to 
want Option C to reduce the state on ASBRs.

In these context, its not the workload (VM or baremetal) that would 
typically handle VRFs, but really the vswitch or ToR.


>> 2015-11-13, Henderickx, Wim (Wim):
>>
>> TM> The right trade-off to make may in fact depend on whether you prefer:
>> (a) a new dataplane stitching behavior on DC ASBRs (the behavior 
>> specified in this draft)
>> or (b) an evolution of the encaps on the vswitches and ToRs to 
>> support MPLS/MPLS/(UDP or GRE)
>>
>> WH> b depends on the use case
>
> I don't get what you mean by "b depends on the use case".
> WH> see my above comment. If the real use case is an application 
> behind NVE/TOR requiring model C, than all the discussion on impact on 
> NVE/TOR is void. As such I want to have a discussion on the real 
> driver/requirement for option c interworking with an IP based Fabric.

Although I can agree than detailing requirements can always help, I 
don't think one can assume a certain application to dismiss the proposal.


>
> I wrote the above based on the idea that the encap used in 
> MPLS/MPLS/(UDP or GRE), which hence has to be supported on the ToRs 
> and vswitches.
> Another possibility would be service-label/middle-label/Ethernet 
> assuming an L2 adjacency between vswitches/ToRs and ASBRs, but this 
> certainly does not match your typical DC architecture. Or perhaps had 
> you something else in mind ?
>
> WH> see above. The draft right now also requires changes in existing 
> TOR/NVE so for me all this discussion/debate is void.

No, the spec as it is can be implemented in its VXLAN variant with 
existing vswitches (e.g. OVS allows to choose the VXLAN destination 
port, ditto for the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible 
enough VXLAN dataplane nor support for any MPLS-over-IP.)

>
>> WH> and depending on implementation you don’t need to change any of 
>> the TOR/vswitches.
>
> Does this mean that for some implementations you may not need to 
> change any of the TOR/vswitches, but that for some others you may ?
>
> WH> any proposal on the table requires changes, so for me this is not 
> a valid discussion

See above, the proposal in the draft does not necessarily need changes 
in vswitches.

>
> Let me take a practical example : while I can quite easily see how to 
> implement the procedures in draft-hao-bess-inter-nvo3-vpn-optionc 
> based on current vswitch implementations of VXLAN, the lack of 
> MPLS/MPLS/(UDP, GRE) support in commonplace vswitches seems to me as 
> making that alternate solution you suggest harder to implement.
>
> WH> I would disagree to this. Tell me which switch/TOR handles 
> multiple UDP ports for VXLAN ?

I mentioned _v_switches, and many do support a variable destination port 
for VXLAN, which is sufficient to implement what the draft proposes.

-Thomas




>
>
>
>
>>
>>>
>>> From: Thomas Morin <thomas.morin@orange.com>
>>> Organization: Orange
>>> Date: Friday 13 November 2015 at 09:57
>>> To: Wim Henderickx <wim.henderickx@alcatel-lucent.com>
>>> Cc: "bess@ietf.org" <bess@ietf.org>
>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>>
>>> Hi Wim,
>>>
>>> I agree on the analysis that this proposal is restricted to 
>>> implementations that supports the chosen encap with non-IANA ports 
>>> (which may be hard to achieve for instance on hardware 
>>> implementations, as you suggest), or to context where managing 
>>> multiple IPs would be operationally viable.
>>>
>>> However, it does not seem obvious to me how the alternative you 
>>> propose [relying on 3-label option C with an MPLS/MPLS/(UDP|GRE) 
>>> encap] addresses the issue of whether the encap behavior is 
>>> supported or not (e.g. your typical ToR chipset possibly may not 
>>> support this kind of encap, and even software-based switches may not 
>>> be ready to support that today).
>>>
>>> My take is that having different options to adapt to various 
>>> implementations constraints we may have would have value.
>>>
>>> (+ one question below on VXLAN...)
>>>
>>> -Thomas
>>>
>>>
>>> 2015-11-12, Henderickx, Wim (Wim):
>>>>> On VXLAN/NVGRE, do you challenge the fact that they would be used 
>>>>> with a dummy MAC address that would be replaced by the right MAC 
>>>>> by a sender based on an ARP request when needed ?
>>>>
>>>> Is the above the issue you had in mind about VXLAN and NVGRE ?
>>>>
>>>> WH> yes
>>>
>>> I you don't mind me asking : why do you challenge that ?
>>>
>>>
>>
>


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--------------070004070300070203010805
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<html>
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    <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    <div class="moz-cite-prefix">Hi Wim, WG,<br>
      <br>
      2015-11-16, Henderickx, Wim (Wim):<br>
    </div>
    <blockquote
      cite="mid:09C99D22-AE4B-4BF1-8010-18CD93CF5478@alcatel-lucent.com"
      type="cite"><span id="OLK_SRC_BODY_SECTION">
        <div>
          <div style="word-wrap: break-word; -webkit-nbsp-mode: space;
            -webkit-line-break: after-white-space; color: rgb(0, 0, 0);
            font-size: 14px; font-family: Calibri, sans-serif;"><span
              id="OLK_SRC_BODY_SECTION">
              <div>
                <div text="#000000" bgcolor="#FFFFFF">
                  <div class="moz-cite-prefix">
                    <br>
                    2015-11-13, Henderickx, Wim (Wim):<br>
                  </div>
                  <blockquote
                    cite="mid:61AE87C2-D215-4135-94A3-6C648FAA614E@alcatel-lucent.com"
                    type="cite">
                    <div>
                      <div>Thomas, we can discuss forever and someone
                        need to describe requirements, but the current
                        proposal I cannot agree to for the reasons
                        explained.</div>
                    </div>
                  </blockquote>
                  <br>
                  TM&gt; Well, although discussing forever is certainly
                  not the goal, the reasons for rejecting a proposal
                  need to be thoroughly understood.</div>
              </div>
            </span></div>
        </div>
      </span>
      <div>WH&gt; my point is what is the real driver for supporting a
        plain VXLAN data-plane here, the use cases I have seen in this
        txt is always where an application behind a NVE/TOR is demanding
        option c, but none of the NVE/TOR elements.</div>
      <span id="OLK_SRC_BODY_SECTION">
        <div>
          <div style="word-wrap: break-word; -webkit-nbsp-mode: space;
            -webkit-line-break: after-white-space; color: rgb(0, 0, 0);
            font-size: 14px; font-family: Calibri, sans-serif;">
            <span id="OLK_SRC_BODY_SECTION">
              <div>
                <div text="#000000" bgcolor="#FFFFFF"><br>
                </div>
              </div>
            </span></div>
        </div>
      </span></blockquote>
    <br>
    My understanding is that the applications  are contexts where
    overlays are present is when workloads (VMs or baremetal) need to be
    interconnected with VPNs. In these contexts, there can be reasons to
    want Option C to reduce the state on ASBRs.<br>
    <br>
    In these context, its not the workload (VM or baremetal) that would
    typically handle VRFs, but really the vswitch or ToR.<br>
    <br>
    <br>
    <blockquote
      cite="mid:09C99D22-AE4B-4BF1-8010-18CD93CF5478@alcatel-lucent.com"
      type="cite"><span id="OLK_SRC_BODY_SECTION">
        <div>
          <div style="word-wrap: break-word; -webkit-nbsp-mode: space;
            -webkit-line-break: after-white-space; color: rgb(0, 0, 0);
            font-size: 14px; font-family: Calibri, sans-serif;"><span
              id="OLK_SRC_BODY_SECTION">
              <div>
                <div text="#000000" bgcolor="#FFFFFF">
                  <blockquote
                    cite="mid:61AE87C2-D215-4135-94A3-6C648FAA614E@alcatel-lucent.com"
                    type="cite"><span id="OLK_SRC_BODY_SECTION">
                      <div>
                        <div bgcolor="#FFFFFF" text="#000000">
                          <div class="moz-cite-prefix">2015-11-13,
                            Henderickx, Wim (Wim):<br>
                          </div>
                          <br>
                          TM&gt; The right trade-off to make may in fact
                          depend on whether you prefer:<br>
                          (a) a new dataplane stitching behavior on DC
                          ASBRs (the behavior specified in this draft)<br>
                          or (b) an evolution of the encaps on the
                          vswitches and ToRs to support MPLS/MPLS/(UDP
                          or GRE)</div>
                      </div>
                    </span>
                    <div><br>
                    </div>
                    <div>WH&gt; b depends on the use case </div>
                  </blockquote>
                  <br>
                  I don't get what you mean by "b depends on the use
                  case". </div>
              </div>
            </span></div>
        </div>
      </span>
      <div>WH&gt; see my above comment. If the real use case is an
        application behind NVE/TOR requiring model C, than all the
        discussion on impact on NVE/TOR is void. As such I want to have
        a discussion on the real driver/requirement for option c
        interworking with an IP based Fabric.</div>
    </blockquote>
    <br>
    Although I can agree than detailing requirements can always help, I
    don't think one can assume a certain application to dismiss the
    proposal.<br>
    <br>
    <br>
    <blockquote
      cite="mid:09C99D22-AE4B-4BF1-8010-18CD93CF5478@alcatel-lucent.com"
      type="cite">
      <span id="OLK_SRC_BODY_SECTION">
        <div>
          <div style="word-wrap: break-word; -webkit-nbsp-mode: space;
            -webkit-line-break: after-white-space; color: rgb(0, 0, 0);
            font-size: 14px; font-family: Calibri, sans-serif;">
            <span id="OLK_SRC_BODY_SECTION">
              <div>
                <div text="#000000" bgcolor="#FFFFFF"><br>
                  I wrote the above based on the idea that the encap
                  used in MPLS/MPLS/(UDP or GRE), which hence has to be
                  supported on the ToRs and vswitches.<br>
                  Another possibility would be
                  service-label/middle-label/Ethernet assuming an L2
                  adjacency between vswitches/ToRs and ASBRs, but this
                  certainly does not match your typical DC architecture.
                  Or perhaps had you something else in mind ?</div>
              </div>
            </span></div>
        </div>
      </span>
      <div><br>
      </div>
      <div>WH&gt; see above. The draft right now also requires changes
        in existing TOR/NVE so for me all this discussion/debate is
        void.</div>
    </blockquote>
    <br>
    No, the spec as it is can be implemented in its VXLAN variant with
    existing vswitches (e.g. OVS allows to choose the VXLAN destination
    port, ditto for the linux kernel stack).<br>
    <br>
    (ToR is certainly another story, most of them not having a flexible
    enough VXLAN dataplane nor support for any MPLS-over-IP.)<br>
    <br>
    <blockquote
      cite="mid:09C99D22-AE4B-4BF1-8010-18CD93CF5478@alcatel-lucent.com"
      type="cite"><span id="OLK_SRC_BODY_SECTION">
        <div>
          <div style="word-wrap: break-word; -webkit-nbsp-mode: space;
            -webkit-line-break: after-white-space; color: rgb(0, 0, 0);
            font-size: 14px; font-family: Calibri, sans-serif;"><span
              id="OLK_SRC_BODY_SECTION">
              <div>
                <div text="#000000" bgcolor="#FFFFFF">
                  <br>
                  <blockquote
                    cite="mid:61AE87C2-D215-4135-94A3-6C648FAA614E@alcatel-lucent.com"
                    type="cite">
                    <div>WH&gt; and depending on implementation you
                      don’t need to change any of the TOR/vswitches.</div>
                  </blockquote>
                  <br>
                  Does this mean that for some implementations you may
                  not need to change any of the TOR/vswitches, but that
                  for some others you may ?</div>
              </div>
            </span></div>
        </div>
      </span>
      <div><br>
      </div>
      <div>WH&gt; any proposal on the table requires changes, so for me
        this is not a valid discussion</div>
    </blockquote>
    <br>
    See above, the proposal in the draft does not necessarily need
    changes in vswitches.<br>
    <br>
    <blockquote
      cite="mid:09C99D22-AE4B-4BF1-8010-18CD93CF5478@alcatel-lucent.com"
      type="cite">
      <span id="OLK_SRC_BODY_SECTION">
        <div>
          <div style="word-wrap: break-word; -webkit-nbsp-mode: space;
            -webkit-line-break: after-white-space; color: rgb(0, 0, 0);
            font-size: 14px; font-family: Calibri, sans-serif;">
            <span id="OLK_SRC_BODY_SECTION">
              <div>
                <div text="#000000" bgcolor="#FFFFFF"><br>
                  Let me take a practical example : while I can quite
                  easily see how to implement the procedures in
                  draft-hao-bess-inter-nvo3-vpn-optionc based on current
                  vswitch implementations of VXLAN, the lack of
                  MPLS/MPLS/(UDP, GRE) support in commonplace vswitches
                  seems to me as making that alternate solution you
                  suggest harder to implement.</div>
              </div>
            </span></div>
        </div>
      </span>
      <div><br>
      </div>
      <div>WH&gt; I would disagree to this. Tell me which switch/TOR
        handles multiple UDP ports for VXLAN ?</div>
    </blockquote>
    <br>
    I mentioned _v_switches, and many do support a variable destination
    port for VXLAN, which is sufficient to implement what the draft
    proposes.<br>
    <br>
    -Thomas<br>
    <br>
    <br>
    <br>
    <br>
    <blockquote
      cite="mid:09C99D22-AE4B-4BF1-8010-18CD93CF5478@alcatel-lucent.com"
      type="cite"><span id="OLK_SRC_BODY_SECTION">
        <div>
          <div style="word-wrap: break-word; -webkit-nbsp-mode: space;
            -webkit-line-break: after-white-space; color: rgb(0, 0, 0);
            font-size: 14px; font-family: Calibri, sans-serif;"><span
              id="OLK_SRC_BODY_SECTION">
              <div>
                <div text="#000000" bgcolor="#FFFFFF">
                  <br>
                  <br>
                  <br>
                  <br>
                  <blockquote
                    cite="mid:61AE87C2-D215-4135-94A3-6C648FAA614E@alcatel-lucent.com"
                    type="cite">
                    <span id="OLK_SRC_BODY_SECTION">
                      <div>
                        <div bgcolor="#FFFFFF" text="#000000"><br>
                          <blockquote
                            cite="mid:E3917F57-B9F4-417D-9E9B-8D1330CC2506@alcatel-lucent.com"
                            type="cite">
                            <div>
                            </div>
                            <div><br>
                            </div>
                            <span id="OLK_SRC_BODY_SECTION">
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                                PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df
                                1pt solid; BORDER-RIGHT: medium none;
                                PADDING-TOP: 3pt">
                                <span style="font-weight:bold">From: </span>Thomas
                                Morin &lt;<a moz-do-not-send="true"
                                  class="moz-txt-link-abbreviated"
                                  href="mailto:thomas.morin@orange.com">thomas.morin@orange.com</a>&gt;<br>
                                <span style="font-weight:bold">Organization:
                                </span>Orange<br>
                                <span style="font-weight:bold">Date: </span>Friday
                                13 November 2015 at 09:57<br>
                                <span style="font-weight:bold">To: </span>Wim
                                Henderickx &lt;<a moz-do-not-send="true"
                                  class="moz-txt-link-abbreviated"
                                  href="mailto:wim.henderickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a>&gt;<br>
                                <span style="font-weight:bold">Cc: </span>"<a
                                  moz-do-not-send="true"
                                  class="moz-txt-link-abbreviated"
                                  href="mailto:bess@ietf.org"><a class="moz-txt-link-abbreviated" href="mailto:bess@ietf.org">bess@ietf.org</a></a>"
                                &lt;<a moz-do-not-send="true"
                                  class="moz-txt-link-abbreviated"
                                  href="mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
                                <span style="font-weight:bold">Subject:
                                </span>Re: [bess]
                                draft-hao-bess-inter-nvo3-vpn-optionc<br>
                              </div>
                              <div><br>
                              </div>
                              <div>
                                <div bgcolor="#FFFFFF" text="#000000">
                                  <div class="moz-cite-prefix">Hi Wim,<br>
                                    <br>
                                    I agree on the analysis that this
                                    proposal is restricted to
                                    implementations that supports the
                                    chosen encap with non-IANA ports
                                    (which may be hard to achieve for
                                    instance on hardware
                                    implementations, as you suggest), or
                                    to context where managing multiple
                                    IPs would be operationally viable.  
                                    <br>
                                    <br>
                                    However, it does not seem obvious to
                                    me how the alternative you propose
                                    [relying on 3-label option C with an
                                    MPLS/MPLS/(UDP|GRE) encap] addresses
                                    the issue of whether the encap
                                    behavior is supported or not (e.g.
                                    your typical ToR chipset possibly
                                    may not support this kind of encap, 
                                    and even software-based switches may
                                    not be ready to support that today).<br>
                                    <br>
                                    My take is that having different
                                    options to adapt to various
                                    implementations constraints we may
                                    have would have value.<br>
                                    <br>
                                    (+ one question below on VXLAN...)<br>
                                    <br>
                                    -Thomas<br>
                                    <br>
                                    <br>
                                    2015-11-12, Henderickx, Wim (Wim):<br>
                                  </div>
                                  <blockquote
                                    cite="mid:94504E5E-B0D8-41DC-8967-E860E46F4C92@alcatel-lucent.com"
                                    type="cite">
                                    <span id="OLK_SRC_BODY_SECTION">
                                      <div>
                                        <div text="#000000"
                                          bgcolor="#FFFFFF">
                                          <blockquote
                                            cite="mid:31144DC0-E53C-4890-AD51-29A49C45F6DB@alcatel-lucent.com"
                                            type="cite">
                                            On VXLAN/NVGRE, do you
                                            challenge the fact that they
                                            would be used with a dummy
                                            MAC address that would be
                                            replaced by the right MAC by
                                            a sender based on an ARP
                                            request when needed ?<br>
                                            <span
                                              id="OLK_SRC_BODY_SECTION"></span></blockquote>
                                          <br>
                                          Is the above the issue you had
                                          in mind about VXLAN and NVGRE
                                          ?</div>
                                      </div>
                                    </span>
                                    <div><br>
                                    </div>
                                    <div>WH&gt; yes</div>
                                  </blockquote>
                                  <br>
                                  I you don't mind me asking : why do
                                  you challenge that ?<br>
                                  <br>
                                  <br>
                                </div>
                              </div>
                            </span></blockquote>
                          <br>
                        </div>
                      </div>
                    </span></blockquote>
                  <br>
                </div>
              </div>
            </span></div>
        </div>
      </span>
    </blockquote>
    <br>
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From: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>
To: "thomas.morin@orange.com" <thomas.morin@orange.com>, BESS <bess@ietf.org>
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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From: Lucy yong <lucy.yong@huawei.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "thomas.morin@orange.com" <thomas.morin@orange.com>, BESS <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Date: Tue, 17 Nov 2015 19:54:34 +0000
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From: Lucy yong <lucy.yong@huawei.com>
To: John E Drake <jdrake@juniper.net>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, BESS <bess@ietf.org>
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Subject: [bess] I-D Action: draft-ietf-bess-mvpn-extranet-04.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
 This draft is a work item of the BGP Enabled Services Working Group of the IETF.

        Title           : Extranet Multicast in BGP/IP MPLS VPNs
        Authors         : Yakov Rekhter
                          Eric C. Rosen
                          Rahul Aggarwal
                          Yiqun Cai
                          Thomas Morin
	Filename        : draft-ietf-bess-mvpn-extranet-04.txt
	Pages           : 61
	Date            : 2015-11-17

Abstract:
   Previous RFCs specify the procedures necessary to allow IP multicast
   traffic to travel from one site to another within a BGP/MPLS IP VPN
   (Virtual Private Network).  However, it is sometimes desirable to
   allow multicast traffic whose source is in one VPN to be received by
   systems that are in another VPN.  This is known as a "Multicast VPN
   (MVPN) extranet".  This document updates RFCs 6513, 6514, and 6625 by
   specifying the procedures that are necessary in order to provide MVPN
   extranet service.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-extranet/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-bess-mvpn-extranet-04

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-mvpn-extranet-04


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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Subject: Re: [bess] AD Review of draft-ietf-bess-mvpn-extranet-03
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On 11/12/2015 2:50 PM, Alvaro Retana (aretana) wrote:
> Hi!
>
> I just finished reading this document.

[Eric]  Alvaro, thanks for your review.  I just posted revision -04, 
with a number of edits made in response to your comments.

> As mentioned by the WG chairs at the meeting in Yokohama, the technology
> in bess can be complex and hard to penetrate for the average (or novice)
> reader.  While the target of documents like this one is not always the
> average (or novice) reader, it is important that those readers
> (including the IESG and other review directorates) are able to at least
> understand what's going on.

[Eric] Often, reviewers from various directorates are assigned documents
that they are not qualified to review.  This is certainly a problem, but 
not a problem with the documents.  There is also a problem with certain 
ADs (NOT routing area ADs of course) who don't know nearly as much as 
they think they do.  Well, luckily for them, bidirectional multicast is 
not discussed in this document, as it really seems to freak them out!

> Because of the length of the document, it would be nice to include a
> "road map" to guide the reader (in general: "Section x talks about X,
> Section y covers Y, etc.").  It might be easier to include references to
> the specific sections in 1.4 (Overview).

[Eric]  I think the table of contents is as good a road map as we are 
going to get.  Adding additional pointers to the overview doesn't 
provide additional value, and most likely would just introduce errors.
>
> This is a long standards track document, so it is bound to have a lot of
> normative language.  On one hand I don't want to go overboard with
> explicitly mandating every little step..but at the same time we want to
> be clear as to what is "actually required for interoperation or to limit
> behavior which has potential for causing harm" [RFC2119].  Due to the
> potential of bad configurations resulting in incomplete/illdefined
> extranets, I can see why the behavior around RTs would require normative
> language.  However, there are some places where the use of rfc2119
> keywords may be lacking, not needed or inconsistent.  An example of
> inconsistency is this paragraph from Section 7.2.3.1. (When Inter-Site
> Shared Trees Are Used):
>
>     If VRF-S exports a Source Active A-D route that contains C-S in the
>     Multicast Source field of its NLRI, and if that VRF also exports a
>     UMH-eligible route matching C-S, the Source Active A-D route MUST
>     carry at least one RT in common with the UMH-eligible route.  The RT
>     must be chosen such that the following condition holds: if VRF-R
>     contains an extranet C-receiver allowed by policy to receive extranet
>     traffic from C-S, then VRF-R imports both the UMH-eligible route and
>     the Source Active A-D route.
>
> .. If the "route MUST carry at least one RT", why isn't the condition to
> be met also normative?  I don't want to belabor on this specific case,
> it is just an example.

[Eric] I think you are right about this case; I've fixed the text.

> However, I would appreciate it if the authors
> would scan the document for required or unneeded normative language.  I
> pointed at some cases in my comments below.

[Eric] I looked at each of the 200 or so occurrences of "must", 
"should", etc., and made some changes.  I think it's more consistent 
now, but the criteria for when to say "MUST" and when to say "must" have 
never been very clear.

> I do have a couple of items that I think are Major (see below) that I
> would like to see addressed before starting the IETF Last Call.

> Major:
>
>  1. Section 1.3. (Clarification on Use of Route Distinguishers) uses the
>     word "REQUIREs" in a couple of places.  In a strict manner, the
>     rfc2119 key words is "REQUIRED".  While I think that the meaning of
>     using "REQUIREs" should be obvious, please rephrase the text to
>     strictly use the rfc2119 language.

[Eric]  I changed "this document REQUIREs" to "it is REQUIRED by this
document".  Hopefully, the RFC editor won't ding me for unnecessary use
of the passive voice ;-)

>  2. Section 10 (Security Considerations)
>       * What is a "VPN security violation"?  It is mentioned in several
>         places, but it is not explicitly defined.  Please either add a
>         reference or be clear in what it is.

[Eric] A "VPN security violation" is just any situation in which a
packet gets delivered to a VPN where it isn't supposed to go.  I added a
definition in the terminology section, and also in the Security
Considerations section.

>       * Misconfiguration is a significant risk, for example assigning
>         the wrong RTs to the wrong routes.  I think that risk should be
>         mentioned.

[Eric] This is generally true of any technology based upon RFC4364.  I
added a sentence about this to the Security Considerations.

> Minor:
>
>  1. Section 1.1. (Terminology): "We will sometimes say that a route
>     "matches" a particular host if the route matches an IP address of
>     the host."  Given the previous definition (in the same paragraph) of
>     "match" ("the address prefix of the given route is the longest match
>     in that VRF for the given IP address") and the use of match there
>     makes it unclear whether you're talking about a host route or just
>     the longest match.

[Eric] I don't see the ambiguity here.  A given IP address matches a 
given route in the context of a given VRF if the route's address prefix 
is the longest match in that VRF for that address.  A host matches a 
route if the host's IP address matches the route.

>  2. Section 1.3. (Clarification on Use of Route Distinguishers)
>       * This section explains the "unique VRF per RD" condition a couple
>         of times — even though the explanation seems to be the same, it
>         would be nice if it was explained only once.

[Eric]  I think it is explained only once.  There is also an explanation
of the "unique RD per VRF" condition, which is different than the 
"unique VRF per RD" condition.

>       * ""default RD" (discussed above)"  Where this text appears is in
>         fact the first time that a "default RD" is mentioned.  I'm
>         guessing that this refers to the RD in the "unique VRF per RD"
>         condition, but please don't make the reader guess.

[Eric] You're right, the term "default RD" should not have been
introduced without explanation.  When a VRF is configured with only one
RD, we call that the "default RD" for that VRF.  When a VRF is
configured with two RDs, one is configured to be the "default RD", and
one is configured to be the "extranet RD".  I've tried to clear this up
in the text.

>  3. Section 4.1. (UMH-Eligible Routes)  The "MAY" in the second
>     paragraph appears to be part of the example.  Suggested new text:
>       * The UMH-eligible extranet C-source routes do not necessarily
>         have to be unicast routes, they MAY be SAFI-129 routes (see
>         Section 5.1.1 of   [RFC6513]).  If one wants, e.g., a VPN-R
>         C-receiver to be able to receive extranet C-flows from
>         C-sources in VPN-S, but one does not want any VPN-R system to
>         be able to send unicast traffic to those C-sources, then the
>         UMH-eligible routes exported from VPN-S and imported by VPN-R
>         may be SAFI-129 routes.  The SAFI-129 routes are used only
>         for UMH determination, but not for unicast routing.

[Eric] I've modified the text in Section 4.1 to fix this problem.  (The
new text is based on your suggestion, but is slightly different.)

>  4. Section 4.2. (Distribution of Unicast Routes Matching C-RPs and
>     DRs)  "It follows that if a VRF contains C-S, but does not contain a
>     C-RP for C-G, then the VRF must import a unicast route matching a
>     C-RP for C-G." and "Similarly, if a VRF contains a C-RP for C-G, but
>     does not contain C-S, the VRF must import a unicast route matching
>     the DR for C-S."  Should those "must" be a "MUST"?

[Eric] Yes, fixed.

>  5. Section 4.4.1. (The Extranet Source Extended Community)  "…only
>     useful when all the extranet routes from a given VRF are exported
>     with exactly the same set of RTs.  (Cf.  Section 4.3.1 of [RFC4364],
>     which does provide a mechanism…"   Is there any inference that
>     should be made from this text?  Should the Extranet Source Extended
>     Community not be used when the mechanism in rfc4364 is used?  Any
>     downsides if both are used?

[Eric] The CE puts the Extranet Source EC on a given IP route in order
to tell the PE that when the route is propagated as a VPN-IP route, it
should carry the set of RTs that have been provisioned for extranet
sources.  If the CE is using a different mechanism (such as described in
section 4.3.1 of RFC4364) to tell the PE exactly which RTs the route
should carry, there is no point in using the Extranet Source EC.  So it
doesn't make sense to use both mechanisms.  I've put in some explanatory
text saying characterizing the circumstances under which the CE SHOULD
NOT put on the EC, and saying that the PE SHOULD ignore the EC in those
circumstances.

>  6. Section 5.2. (Considerations for Particular Inclusive Tunnel Types)
>       * Please include a reference (or definition) for "inclusive
>         tunnel" (maybe in the Terminology).  I couldn't find one in
>         rfc6513, but did in rfc7582.

[Eric] I put in some text defining "Inclusive Tunnel", and making it 
clear that it is the same thing that is called "Inclusive Tree" in 
RFC6513. (Unfortunately, terminology is not entirely consistent across 
the entire set of MVPN documents.  RFC6625, e.g., uses "Inclusive 
P-tunnel".)

>       * The third paragraph ("In order for VRF-S to set up the P2MP…")
>         seems to explain what is needed for the setup, which is
>         something that I assume is standardized in a different
>         document.  If so, then the "MUST" shouldn't be normative in this
>         document.  s/MUST/must

[Eric] Okay, fixed.

>  7. Section 7.2.1. (Intra-AS I-PMSI A-D Routes)  "As specified in
>     [RFC6514]…the RTs carried by that route MUST be chosen…"  That
>     "MUST" is really in reference to rfc6514, so it shouldn't be
>     normative in this document.  If you want to stress the "MUST", then
>     one solution could be to quote the relevant text; otherwise s/MUST/must

[Eric] Okay, fixed.

>  8. It would be nice if section names were used in addition to section
>     numbers when referring to them in the text — that would make it
>     easier to recall (or look forward to) the text w/out having to go
>     look at the TOC over and over.

[Eric] The section numbers are inserted by means of the <xref
target="whatever"/> mechanism.  I experimented with adding the section
names by adding &quot;<xref target="whatever" format="title">&quot;
However, I found that xml2rfc often did not render the section names
properly, so I had to back this out.  I don't think it's a good practice 
to put the section names in by hand.

> [This point may be able to be addressed by the RFC Editor.]  It looks like you started doing this
> in some places in Section 7, but it is not consistent.

[Eric] Just an accident.

>  9. In several places the text reads: "This document provides
>     procedures…"  Please include a reference to the section where those
>     procedures are.

[Eric] I'd like to be able to say "this document covers X but does not 
cover Y" without having to stop and  give a complete set of references 
to every place in the document where something relevant to X is 
mentioned.  Leaving out a reference would just introduce an error, and 
in any event the proper sections can be found in the ToC.

> 10. Please expand on first use:
>       * s/S-PMSI/Selective Provider Multicast Service Interface (S-PMSI)
>       *   s/SSM/source-specific multicast (SSM)
>       *   s/I-PMSI/Inclusive-PMSI (I-PMSI)
>       *   s/MI-PMSI/Multidirectional I-PMSI (MI-PMSI)

[Eric] Done.

> 11. References: Update the reference to rfc4601 to
>     draft-ietf-pim-rfc4601bis.

[Eric] The last time I included a normative reference to an 
internet-draft, my document got stuck on the RFC Editor's queue for 
about 5 years!  If 4601bis becomes an RFC before the extranet draft does 
(which I admit does seem likely), this change can be made during the 
AUTH48 period (probably the RFC Editor will do it automatically).

> Nits:
>
>  1. Some replacements:
>       * s/misdelivery of data in those scenarios are outlined in those
>         Section 2.3/misdelivery of data in those scenarios are outlined
>         in Section 2.3
>       * (6.3.1) s/and Each such/and each such
>       * (7.1) s/"corresponds to" to/"corresponds" to

[Eric] Fixed.


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From: Lucy yong <lucy.yong@huawei.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "thomas.morin@orange.com" <thomas.morin@orange.com>, BESS <bess@ietf.org>
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From: Haoweiguo <haoweiguo@huawei.com>
To: John E Drake <jdrake@juniper.net>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, BESS <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Date: Wed, 18 Nov 2015 04:23:49 +0000
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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--_000_DD5FC8DE455C3348B94340C0AB5517334F8E5185nkgeml501mbschi_
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Hi,

The problem we are trying to solve is to reduce data center GW/ASBR-d's for=
warding table size, the motivation is same as traditional MPLS VPN option-C=
. Currently, the most common practise on ASBR-d is to terminate VXLAN encap=
sulation, look up local routing table, and then perform MPLS encapsulation =
to the WAN network. ASBR-d needs to maintain all VM's MAC/IP. In Option-C m=
ethod, only transport layer information needed to be maintained at GW/ASBR-=
d, the scalability will be greatly enhanced. Traditonal Option-C is only fo=
r MPLS VPN network interworking, because VXLAN is becoming pervasive in dat=
a center,  the solution in this draft was proposed for the heterogeneous ne=
twork interworking.

The advantage of this solution is that only VXLAN encapsulation is required=
 for OVS/TOR. Unlike Wim's solution, east-west bound traffic uses VXLAN enc=
ap, while north-south bound traffic uses MPLSoGRE/UDP encap.

There are two solutions in this draft:

1. Using VXLAN tunnel destination IP for stitching at ASBR-d.

No data plane modification requirements on OVS or TOR switches, only hardwa=
re changes on ASBR-d. ASBR-d normally is router, it has capability to reali=
ze the hardware changes. It will consume many IP addresses and the IP pool =
for allocation needs to be configured on ASBR-d beforehand.

2. Using VXLAN destination UDP port for stitching at ASBR-d.

Compared with solution 1, less IP address will be consumed for allocation. =
If UDP port range is too large, we can combine with solution 1 and 2.

In this solution, both data plane modification changes are needed at OVS/TO=
R and ASBR-d. ASBR-d also has capability to realize the hardware changes. F=
or OVS, it also can realize the data plane changes. For TOR switch, it norm=
ally can't realize this function.  This solution mainly focuses on pure sof=
tware based overlay network, it has more scalability. In public cloud data =
center, software based overlay network is the majority case.



Whether using solution 1 or 2 depends on the operators real envionment.



So I think our solution has no flaws, it works fine.

Thanks,

weiguo



________________________________
From: BESS [bess-bounces@ietf.org] on behalf of John E Drake [jdrake@junipe=
r.net]
Sent: Wednesday, November 18, 2015 2:49
To: Henderickx, Wim (Wim); EXT - thomas.morin@orange.com; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi,

I think Wim has conclusively demonstrated that this draft has fatal flaws a=
nd I don=92t support it.  I also agree with his suggestion that we first fi=
gure out what problem we are trying to solve before solving it.

Yours Irrespectively,

John

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Tuesday, November 17, 2015 12:49 PM
To: EXT - thomas.morin@orange.com; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

=97 Snip =97

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support? For this to work =
every tenant needs a different VXLAN UDP destination port/receive port.
There might be SW elements that could do some of this, but IETF defines sol=
utions which should be implemented across the board HW/SW/etc. Even if some=
 SW switches can do this, the proposal will impose so many issues in HW/dat=
a-plane engines that I cannot be behind this solution.

To make this work generically we will have to make changes anyhow. Given th=
is, we better do it in the right way and guide the industry to a solution w=
hich does not imply those complexities. Otherwise we will stick with these =
specials forever with all consequences (bugs, etc).

- snip -

From: "thomas.morin@orange.com<mailto:thomas.morin@orange.com>" <thomas.mor=
in@orange.com<mailto:thomas.morin@orange.com>>
Organization: Orange
Date: Tuesday 17 November 2015 at 01:37
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, BESS <bess@ietf.org<mailto:bess@ietf.org>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim, WG,

2015-11-16, Henderickx, Wim (Wim):

2015-11-13, Henderickx, Wim (Wim):
Thomas, we can discuss forever and someone need to describe requirements, b=
ut the current proposal I cannot agree to for the reasons explained.

TM> Well, although discussing forever is certainly not the goal, the reason=
s for rejecting a proposal need to be thoroughly understood.
WH> my point is what is the real driver for supporting a plain VXLAN data-p=
lane here, the use cases I have seen in this txt is always where an applica=
tion behind a NVE/TOR is demanding option c, but none of the NVE/TOR elemen=
ts.


My understanding is that the applications  are contexts where overlays are =
present is when workloads (VMs or baremetal) need to be interconnected with=
 VPNs. In these contexts, there can be reasons to want Option C to reduce t=
he state on ASBRs.

In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.

WH2> can it not be all cases: TOR/vswitch/Application. I would make the sol=
ution flexible to support all of these not?




2015-11-13, Henderickx, Wim (Wim):

TM> The right trade-off to make may in fact depend on whether you prefer:
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)

WH> b depends on the use case

I don't get what you mean by "b depends on the use case".
WH> see my above comment. If the real use case is an application behind NVE=
/TOR requiring model C, than all the discussion on impact on NVE/TOR is voi=
d. As such I want to have a discussion on the real driver/requirement for o=
ption c interworking with an IP based Fabric.

Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.

WH> for me the proposal is not acceptable for the reasons explained: too mu=
ch impact on the data-planes


I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?

WH> see above. The draft right now also requires changes in existing TOR/NV=
E so for me all this discussion/debate is void.

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support?

WH> and depending on implementation you don=92t need to change any of the T=
OR/vswitches.

Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?

WH> any proposal on the table requires changes, so for me this is not a val=
id discussion

See above, the proposal in the draft does not necessarily need changes in v=
switches.



Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems to me as making that alternate solution y=
ou suggest harder to implement.

WH> I would disagree to this. Tell me which switch/TOR handles multiple UDP=
 ports for VXLAN ?

I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.

-Thomas













From: Thomas Morin <thomas.morin@orange.com<mailto:thomas.morin@orange.com>=
>
Organization: Orange
Date: Friday 13 November 2015 at 09:57
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim,

I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs would be operationally viable.

However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support this kind of encap,  and even software=
-based switches may not be ready to support that today).

My take is that having different options to adapt to various implementation=
s constraints we may have would have value.

(+ one question below on VXLAN...)

-Thomas


2015-11-12, Henderickx, Wim (Wim):
On VXLAN/NVGRE, do you challenge the fact that they would be used with a du=
mmy MAC address that would be replaced by the right MAC by a sender based o=
n an ARP request when needed ?


Is the above the issue you had in mind about VXLAN and NVGRE ?

WH> yes

I you don't mind me asking : why do you challenge that ?





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</head>
<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple" fPStyle=3D"1" ocsi=3D"0=
">
<div style=3D"FONT-FAMILY: Tahoma; DIRECTION: ltr; COLOR: #000000; FONT-SIZ=
E: 10pt">
<font size=3D"3" face=3D"Calibri">
<p><font size=3D"3" face=3D"Calibri">Hi,</font></p>
<p><font size=3D"3" face=3D"Calibri">The problem we are trying to solve is =
to reduce data center GW/ASBR-d's forwarding table size, the motivation is =
same as traditional MPLS VPN option-C. Currently, the most common practise =
on ASBR-d is to terminate VXLAN encapsulation,
 look up local routing table, and then perform MPLS encapsulation to the WA=
N network. ASBR-d needs to maintain all VM's MAC/IP. In Option-C method, on=
ly transport layer information needed to be maintained at GW/ASBR-d, the sc=
alability will be greatly enhanced.
 Traditonal Option-C is only for MPLS VPN network interworking, because VXL=
AN is becoming pervasive in data center,&nbsp; the solution in this draft w=
as proposed for the heterogeneous network interworking.</font></p>
<p><font size=3D"3" face=3D"Calibri">The advantage of this solution is that=
 only VXLAN encapsulation is required for OVS/TOR. Unlike Wim's solution, e=
ast-west bound traffic uses VXLAN encap, while north-south bound traffic us=
es MPLSoGRE/UDP encap.</font></p>
<p><font size=3D"3" face=3D"Calibri">There are two solutions in this draft:=
</font></p>
<p><font size=3D"3" face=3D"Calibri">1. Using VXLAN tunnel destination IP f=
or stitching at ASBR-d.</font></p>
<p><font size=3D"3" face=3D"Calibri">No data plane modification requirement=
s on OVS or TOR switches, only hardware changes on ASBR-d. ASBR-d normally =
is router, it has capability to realize the hardware changes. It will consu=
me many IP addresses and the IP pool
 for allocation needs to be configured on ASBR-d beforehand. </font></p>
<p><font size=3D"3" face=3D"Calibri">2. Using VXLAN destination UDP port fo=
r stitching at ASBR-d.</font></p>
<p><font size=3D"3" face=3D"Calibri">Compared with solution 1, less IP addr=
ess will be consumed for allocation. If UDP port range is too large, we can=
 combine with solution 1 and 2.</font></p>
<p><font size=3D"3" face=3D"Calibri">In this solution, both data plane modi=
fication changes are needed at OVS/TOR and ASBR-d. ASBR-d also has capabili=
ty to realize the hardware changes. For OVS, it also can realize the data p=
lane changes. For TOR switch,&nbsp;it normally
 can't realize this function.&nbsp; </font><font size=3D"3" face=3D"Calibri=
">This solution mainly focuses on pure software based overlay network, it h=
as more scalability. In public cloud data center, software based overlay ne=
twork is the majority case.</font></p>
<p><font size=3D"3" face=3D"Calibri"></font>&nbsp;</p>
<p><font size=3D"3" face=3D"Calibri">Whether using solution 1 or 2 depends =
on the operators real envionment.</font></p>
<p><font size=3D"3" face=3D"Calibri"></font>&nbsp;</p>
<p><font size=3D"3" face=3D"Calibri">So I think our solution has no flaws, =
it works fine.
</font></p>
<p><font size=3D"3" face=3D"Calibri">Thanks,</font></p>
<p><font size=3D"3" face=3D"Calibri">weiguo</font></p>
<p></font><font size=3D"3" face=3D"Calibri">&nbsp;</font></p>
<div style=3D"FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px=
">
<hr tabindex=3D"-1">
<div style=3D"DIRECTION: ltr" id=3D"divRpF197338"><font color=3D"#000000" s=
ize=3D"2" face=3D"Tahoma"><b>From:</b> BESS [bess-bounces@ietf.org] on beha=
lf of John E Drake [jdrake@juniper.net]<br>
<b>Sent:</b> Wednesday, November 18, 2015 2:49<br>
<b>To:</b> Henderickx, Wim (Wim); EXT - thomas.morin@orange.com; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br>
</font><br>
</div>
<div></div>
<div>
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt">Hi,</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt">I think Wim has conclusively demonstrated th=
at this draft has fatal flaws and I don=92t support it.&nbsp; I also agree =
with his suggestion that we first figure out
 what problem we are trying to solve before solving it.</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt"></span>&nbsp;</p>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt">Yours Irrespectively,</span></p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt">John</span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: #1f497d; FONT-SIZE: 11pt"></span>&nbsp;</p>
<div style=3D"BORDER-BOTTOM: medium none; BORDER-LEFT: blue 1.5pt solid; PA=
DDING-BOTTOM: 0in; PADDING-LEFT: 4pt; PADDING-RIGHT: 0in; BORDER-TOP: mediu=
m none; BORDER-RIGHT: medium none; PADDING-TOP: 0in">
<div>
<div style=3D"BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING=
-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #e1e1e1 1p=
t solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<p class=3D"MsoNormal"><b><span style=3D"FONT-FAMILY: 'Calibri',sans-serif;=
 FONT-SIZE: 11pt">From:</span></b><span style=3D"FONT-FAMILY: 'Calibri',san=
s-serif; FONT-SIZE: 11pt"> BESS [mailto:bess-bounces@ietf.org]
<b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
<b>Sent:</b> Tuesday, November 17, 2015 12:49 PM<br>
<b>To:</b> EXT - thomas.morin@orange.com; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">=97 Snip =97</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">No, the spec as it is can be implemented in =
its VXLAN variant with existing vswitches (e.g. OVS allows to choose the VX=
LAN destination port, ditto for the
 linux kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">WH&gt; and how many ports simultaneously wou=
ld they support? For this to work every tenant needs a different VXLAN UDP =
destination port/receive port.&nbsp;</span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">There might be SW elements that could do som=
e of this, but IETF defines solutions which should be implemented across th=
e board HW/SW/etc. Even if some SW switches
 can do this, the proposal will impose so many issues in HW/data-plane engi=
nes that I cannot be behind this solution.&nbsp;</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">To make this work generically we will have t=
o make changes anyhow. Given this, we better do it in the right way and gui=
de the industry to a solution which
 does not imply those complexities. Otherwise we will stick with these spec=
ials forever with all consequences (bugs, etc).</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">- snip -</span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div style=3D"BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING=
-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1p=
t solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<p class=3D"MsoNormal"><b><span style=3D"FONT-FAMILY: 'Calibri',sans-serif;=
 COLOR: black">From:
</span></b><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">=
&quot;<a href=3D"mailto:thomas.morin@orange.com" target=3D"_blank">thomas.m=
orin@orange.com</a>&quot; &lt;<a href=3D"mailto:thomas.morin@orange.com" ta=
rget=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Tuesday 17 November 2015 at 01:37<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;, BESS &=
lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;=
<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">Hi Wim, WG,<br>
<br>
2015-11-16, Henderickx, Wim (Wim):</span></p>
</div>
<blockquote style=3D"MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt">
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
2015-11-13, Henderickx, Wim (Wim):</span></p>
</div>
<blockquote style=3D"MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">Thomas, we can discuss forever and someone n=
eed to describe requirements, but the current proposal I cannot agree to fo=
r the reasons explained.</span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
TM&gt; Well, although discussing forever is certainly not the goal, the rea=
sons for rejecting a proposal need to be thoroughly understood.</span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">WH&gt; my point is what is the real driver f=
or supporting a plain VXLAN data-plane here, the use cases I have seen in t=
his txt is always where an application
 behind a NVE/TOR is demanding option c, but none of the NVE/TOR elements.<=
/span></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
My understanding is that the applications&nbsp; are contexts where overlays=
 are present is when workloads (VMs or baremetal) need to be interconnected=
 with VPNs. In these contexts, there can be reasons to want Option C to red=
uce the state on ASBRs.<br>
<br>
In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.</span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">WH2&gt; can it not be all cases: TOR/vswitch=
/Application. I would make the solution flexible to support all of these no=
t?</span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
<br>
<br>
<br>
</span></p>
<blockquote style=3D"MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt">
<div>
<div>
<div>
<div>
<blockquote style=3D"MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">2015-11-13, Henderickx, Wim (Wim):</span></p=
>
</div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
TM&gt; The right trade-off to make may in fact depend on whether you prefer=
:<br>
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)<br>
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)</span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">WH&gt; b depends on the use case
</span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
I don't get what you mean by &quot;b depends on the use case&quot;. </span>=
</p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">WH&gt; see my above comment. If the real use=
 case is an application behind NVE/TOR requiring model C, than all the disc=
ussion on impact on NVE/TOR is void. As
 such I want to have a discussion on the real driver/requirement for option=
 c interworking with an IP based Fabric.</span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.<br>
<br>
WH&gt; for me the proposal is not acceptable for the reasons explained: too=
 much impact on the data-planes<br>
<br>
</span></p>
<blockquote style=3D"MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.<br>
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?</span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">WH&gt; see above. The draft right now also r=
equires changes in existing TOR/NVE so for me all this discussion/debate is=
 void.</span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">WH&gt; and how many ports simultaneously wou=
ld they support?</span></p>
</div>
<div>
<div>
<blockquote style=3D"MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">WH&gt; and depending on implementation you d=
on=92t need to change any of the TOR/vswitches.</span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?</span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">WH&gt; any proposal on the table requires ch=
anges, so for me this is not a valid discussion</span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
See above, the proposal in the draft does not necessarily need changes in v=
switches.<br>
<br>
<br>
</span></p>
<blockquote style=3D"MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems
 to me as making that alternate solution you suggest harder to implement.</=
span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">WH&gt; I would disagree to this. Tell me whi=
ch switch/TOR handles multiple UDP ports for VXLAN ?</span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.<br>
<br>
-Thomas<br>
<br>
<br>
<br>
<br>
<br>
</span></p>
<blockquote style=3D"MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
<br>
<br>
<br>
<br>
</span></p>
<blockquote style=3D"MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
<br>
</span></p>
<blockquote style=3D"MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt">
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div style=3D"BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING=
-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1p=
t solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<p class=3D"MsoNormal"><b><span style=3D"FONT-FAMILY: 'Calibri',sans-serif;=
 COLOR: black">From:
</span></b><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; COLOR: black">=
Thomas Morin &lt;<a href=3D"mailto:thomas.morin@orange.com" target=3D"_blan=
k">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Friday 13 November 2015 at 09:57<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">Hi Wim,<br>
<br>
I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs
 would be operationally viable.&nbsp;&nbsp; <br>
<br>
However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support
 this kind of encap,&nbsp; and even software-based switches may not be read=
y to support that today).<br>
<br>
My take is that having different options to adapt to various implementation=
s constraints we may have would have value.<br>
<br>
(&#43; one question below on VXLAN...)<br>
<br>
-Thomas<br>
<br>
<br>
2015-11-12, Henderickx, Wim (Wim):</span></p>
</div>
<blockquote style=3D"MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt">
<div>
<div>
<blockquote style=3D"MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt">
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">On VXLAN/NVGRE, do you challenge the fact th=
at they would be used with a dummy MAC address that would be replaced by th=
e right MAC by a sender based on an
 ARP request when needed ?<br>
<br>
</span></p>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"><br>
Is the above the issue you had in mind about VXLAN and NVGRE ?</span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt">WH&gt; yes</span></p>
</div>
</blockquote>
<p style=3D"MARGIN-BOTTOM: 12pt" class=3D"MsoNormal"><span style=3D"FONT-FA=
MILY: 'Calibri',sans-serif; COLOR: black; FONT-SIZE: 10.5pt"><br>
I you don't mind me asking : why do you challenge that ?<br>
<br>
</span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"FONT-FAMILY: 'Calibri',sans-serif; CO=
LOR: black; FONT-SIZE: 10.5pt"></span>&nbsp;</p>
<pre><span style=3D"COLOR: black">_________________________________________=
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From: Diego Garcia del Rio <diego@nuagenetworks.net>
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Some comments from my side,


I think the draft makes quite a few assumptions on specific
implementation details that are way too general to be considered
widely available.

Most of the TOR devices today already pay a double-pass penalty when
doing routing of traffic in/out of vxlan-type tunnels. Only the newest
generation can route into tunnels without additional passes. And are
definitively limited in being able to arbitrary select UDP ports on a
per tunnel basis. In fact, most are even limited at using more than
one VNID per "service" of sorts.

The IP-addressed based implementation which would, I assume, imply
assigning one or more CIDRs to a loopback interface on the ASBR-d is
also quite arbitrary and does not seem like a technically "clean"
solution. (besides burning tons of IPs). As a side-note, most PE-grade
routers i've worked with were quite limited in terms of IP addresses
used for tunnel termination and it wasn't that just a simple pool can
be used.

Wim's mentions on cases where the Application itself, hosted in a
datacenter, would be part of the option-C interconnect, was dismissed
without much discussion so far, while, if we look in detail at the
type of users which will even consider a complex topology like model-C
its most likely users and operators very familiar with MPLS VPNs in
the WAN. Those type of operators will most likely be very interested
in deploying MPLS or WAN-grade applications (i.e., virtual-routers or
other VNFs) in the DC and thus its highly likely that the interconnect
would not terminate at the NVE itself but rather the TS (the virtual
machine).

Also, the use of UDP ports at random would imply quite complex logic
on the ASBR-d IMHO. Im not saying its impossible, but since the
received packet now not only has to be received on a random (though
locally chosen) UDP port and this information preserved in the
pipeline to be able to do the double-tunnel-stitching, it sounds quite
complex. I am sure someone in the list will mention this has already
been implemented somewhere, and I won't argue with that. And let's not
even bring into account what this would do to any DC middlebox that
now has to look at vxlan over almost any random port. We have to go
back to the "is it a 4 or is it a 6 in byte x" heuristics to try to
guess whether the packet is vxlan or just something entirely different
running over IP.

In general I feel the proposed solution seems to be fitting of a
specific use-case which is not really detailed in the draft and does
not describe   a solution that would "elegantly" solve the issues at
hand. It just feels like we're using any available bit-space to stuff
data into places that do not necesarily belong.

Yes, MPLS encapsulations on virtual switches are not yet fully
available, and there can be some performance penalty on the TORs, but
the solutions are much cleaner from a control and data plane point of
view. Maybe I'm too utopic.


Best regards,

Diego




---------------------------------------------------------------------------=
------

Hi,

The problem we are trying to solve is to reduce data center
GW/ASBR-d's forwarding table size, the motivation is same as
traditional MPLS VPN option-C. Currently, the most common practise on
ASBR-d is to terminate VXLAN encapsulation, look up local routing
table, and then perform MPLS encapsulation to the WAN network. ASBR-d
needs to maintain all VM's MAC/IP. In Option-C method, only transport
layer information needed to be maintained at GW/ASBR-d, the
scalability will be greatly enhanced. Traditonal Option-C is only for
MPLS VPN network interworking, because VXLAN is becoming pervasive in
data center,  the solution in this draft was proposed for the
heterogeneous network interworking.

The advantage of this solution is that only VXLAN encapsulation is
required for OVS/TOR. Unlike Wim's solution, east-west bound traffic
uses VXLAN encap, while north-south bound traffic uses MPLSoGRE/UDP
encap.

There are two solutions in this draft:

1. Using VXLAN tunnel destination IP for stitching at ASBR-d.

No data plane modification requirements on OVS or TOR switches, only
hardware changes on ASBR-d. ASBR-d normally is router, it has
capability to realize the hardware changes. It will consume many IP
addresses and the IP pool for allocation needs to be configured on
ASBR-d beforehand.

2. Using VXLAN destination UDP port for stitching at ASBR-d.

Compared with solution 1, less IP address will be consumed for
allocation. If UDP port range is too large, we can combine with
solution 1 and 2.

In this solution, both data plane modification changes are needed at
OVS/TOR and ASBR-d. ASBR-d also has capability to realize the hardware
changes. For OVS, it also can realize the data plane changes. For TOR
switch, it normally can't realize this function.  This solution mainly
focuses on pure software based overlay network, it has more
scalability. In public cloud data center, software based overlay
network is the majority case.



Whether using solution 1 or 2 depends on the operators real envionment.



So I think our solution has no flaws, it works fine.

Thanks,

weiguo



________________________________
From: BESS [bess-bounces@ietf.org] on behalf of John E Drake
[jdrake@juniper.net]
Sent: Wednesday, November 18, 2015 2:49
To: Henderickx, Wim (Wim); EXT - thomas.morin@orange.com; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi,

I think Wim has conclusively demonstrated that this draft has fatal
flaws and I don=E2=80=99t support it.  I also agree with his suggestion tha=
t
we first figure out what problem we are trying to solve before solving
it.

Yours Irrespectively,

John

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Tuesday, November 17, 2015 12:49 PM
To: EXT - thomas.morin@orange.com; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

=E2=80=94 Snip =E2=80=94

No, the spec as it is can be implemented in its VXLAN variant with
existing vswitches (e.g. OVS allows to choose the VXLAN destination
port, ditto for the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible
enough VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support? For this to
work every tenant needs a different VXLAN UDP destination port/receive
port.
There might be SW elements that could do some of this, but IETF
defines solutions which should be implemented across the board
HW/SW/etc. Even if some SW switches can do this, the proposal will
impose so many issues in HW/data-plane engines that I cannot be behind
this solution.

To make this work generically we will have to make changes anyhow.
Given this, we better do it in the right way and guide the industry to
a solution which does not imply those complexities. Otherwise we will
stick with these specials forever with all consequences (bugs, etc).

- snip -

From: "thomas.morin@orange.com<mailto:thomas.morin@orange.com>"
<thomas.morin@orange.com<mailto:thomas.morin@orange.com>>
Organization: Orange
Date: Tuesday 17 November 2015 at 01:37
To: Wim Henderickx
<wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx@alcatel-lucent.com=
>>,
BESS <bess@ietf.org<mailto:bess@ietf.org>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim, WG,

2015-11-16, Henderickx, Wim (Wim):

2015-11-13, Henderickx, Wim (Wim):
Thomas, we can discuss forever and someone need to describe
requirements, but the current proposal I cannot agree to for the
reasons explained.

TM> Well, although discussing forever is certainly not the goal, the
reasons for rejecting a proposal need to be thoroughly understood.
WH> my point is what is the real driver for supporting a plain VXLAN
data-plane here, the use cases I have seen in this txt is always where
an application behind a NVE/TOR is demanding option c, but none of the
NVE/TOR elements.


My understanding is that the applications  are contexts where overlays
are present is when workloads (VMs or baremetal) need to be
interconnected with VPNs. In these contexts, there can be reasons to
want Option C to reduce the state on ASBRs.

In these context, its not the workload (VM or baremetal) that would
typically handle VRFs, but really the vswitch or ToR.

WH2> can it not be all cases: TOR/vswitch/Application. I would make
the solution flexible to support all of these not?




2015-11-13, Henderickx, Wim (Wim):

TM> The right trade-off to make may in fact depend on whether you prefer:
(a) a new dataplane stitching behavior on DC ASBRs (the behavior
specified in this draft)
or (b) an evolution of the encaps on the vswitches and ToRs to support
MPLS/MPLS/(UDP or GRE)

WH> b depends on the use case

I don't get what you mean by "b depends on the use case".
WH> see my above comment. If the real use case is an application
behind NVE/TOR requiring model C, than all the discussion on impact on
NVE/TOR is void. As such I want to have a discussion on the real
driver/requirement for option c interworking with an IP based Fabric.

Although I can agree than detailing requirements can always help, I
don't think one can assume a certain application to dismiss the
proposal.

WH> for me the proposal is not acceptable for the reasons explained:
too much impact on the data-planes


I wrote the above based on the idea that the encap used in
MPLS/MPLS/(UDP or GRE), which hence has to be supported on the ToRs
and vswitches.
Another possibility would be service-label/middle-label/Ethernet
assuming an L2 adjacency between vswitches/ToRs and ASBRs, but this
certainly does not match your typical DC architecture. Or perhaps had
you something else in mind ?

WH> see above. The draft right now also requires changes in existing
TOR/NVE so for me all this discussion/debate is void.

No, the spec as it is can be implemented in its VXLAN variant with
existing vswitches (e.g. OVS allows to choose the VXLAN destination
port, ditto for the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible
enough VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support?

WH> and depending on implementation you don=E2=80=99t need to change any of
the TOR/vswitches.

Does this mean that for some implementations you may not need to
change any of the TOR/vswitches, but that for some others you may ?

WH> any proposal on the table requires changes, so for me this is not
a valid discussion

See above, the proposal in the draft does not necessarily need changes
in vswitches.



Let me take a practical example : while I can quite easily see how to
implement the procedures in draft-hao-bess-inter-nvo3-vpn-optionc
based on current vswitch implementations of VXLAN, the lack of
MPLS/MPLS/(UDP, GRE) support in commonplace vswitches seems to me as
making that alternate solution you suggest harder to implement.

WH> I would disagree to this. Tell me which switch/TOR handles
multiple UDP ports for VXLAN ?

I mentioned _v_switches, and many do support a variable destination
port for VXLAN, which is sufficient to implement what the draft
proposes.

-Thomas













From: Thomas Morin <thomas.morin@orange.com<mailto:thomas.morin@orange.com>=
>
Organization: Orange
Date: Friday 13 November 2015 at 09:57
To: Wim Henderickx
<wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx@alcatel-lucent.com=
>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim,

I agree on the analysis that this proposal is restricted to
implementations that supports the chosen encap with non-IANA ports
(which may be hard to achieve for instance on hardware
implementations, as you suggest), or to context where managing
multiple IPs would be operationally viable.

However, it does not seem obvious to me how the alternative you
propose [relying on 3-label option C with an MPLS/MPLS/(UDP|GRE)
encap] addresses the issue of whether the encap behavior is supported
or not (e.g. your typical ToR chipset possibly may not support this
kind of encap,  and even software-based switches may not be ready to
support that today).

My take is that having different options to adapt to various
implementations constraints we may have would have value.

(+ one question below on VXLAN...)

-Thomas


2015-11-12, Henderickx, Wim (Wim):
On VXLAN/NVGRE, do you challenge the fact that they would be used with
a dummy MAC address that would be replaced by the right MAC by a
sender based on an ARP request when needed ?


Is the above the issue you had in mind about VXLAN and NVGRE ?

WH> yes

I you don't mind me asking : why do you challenge that ?





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--001a11c2c3500a1a5e0524cab5fd
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><pre class=3D"" style=3D"margin-bottom:0px;padding:0px;bor=
der:0px;font-stretch:inherit;font-size:13px;line-height:inherit;font-family=
:Courier,&#39;Courier New&#39;,monospace;vertical-align:baseline;white-spac=
e:pre-wrap;word-wrap:break-word;color:rgb(0,0,0)">Some comments from my sid=
e,</pre><pre class=3D"" style=3D"margin-bottom:0px;padding:0px;border:0px;f=
ont-stretch:inherit;font-size:13px;line-height:inherit;font-family:Courier,=
&#39;Courier New&#39;,monospace;vertical-align:baseline;white-space:pre-wra=
p;word-wrap:break-word;color:rgb(0,0,0)"><br></pre><pre class=3D"" style=3D=
"margin-bottom:0px;padding:0px;border:0px;font-stretch:inherit;font-size:13=
px;line-height:inherit;font-family:Courier,&#39;Courier New&#39;,monospace;=
vertical-align:baseline;white-space:pre-wrap;word-wrap:break-word;color:rgb=
(0,0,0)">I think the draft makes quite a few assumptions on specific implem=
entation details that are way too general to be considered widely available=
.</pre><pre class=3D"" style=3D"margin-bottom:0px;padding:0px;border:0px;fo=
nt-stretch:inherit;font-size:13px;line-height:inherit;font-family:Courier,&=
#39;Courier New&#39;,monospace;vertical-align:baseline;white-space:pre-wrap=
;word-wrap:break-word;color:rgb(0,0,0)">Most of the TOR devices today alrea=
dy pay a double-pass penalty when doing routing of traffic in/out of vxlan-=
type tunnels. Only the newest generation can route into tunnels without add=
itional passes. And are definitively limited in being able to arbitrary sel=
ect UDP ports on a per tunnel basis. In fact, most are even limited at usin=
g more than one VNID per &quot;service&quot; of sorts.</pre><pre class=3D""=
 style=3D"margin-bottom:0px;padding:0px;border:0px;font-stretch:inherit;fon=
t-size:13px;line-height:inherit;font-family:Courier,&#39;Courier New&#39;,m=
onospace;vertical-align:baseline;white-space:pre-wrap;word-wrap:break-word;=
color:rgb(0,0,0)">The IP-addressed based implementation which would, I assu=
me, imply assigning one or more CIDRs to a loopback interface on the ASBR-d=
 is also quite arbitrary and does not seem like a technically &quot;clean&q=
uot; solution. (besides burning tons of IPs). As a side-note, most PE-grade=
 routers i&#39;ve worked with were quite limited in terms of IP addresses u=
sed for tunnel termination and it wasn&#39;t that just a simple pool can be=
 used.</pre><pre class=3D"" style=3D"margin-bottom:0px;padding:0px;border:0=
px;font-stretch:inherit;font-size:13px;line-height:inherit;font-family:Cour=
ier,&#39;Courier New&#39;,monospace;vertical-align:baseline;white-space:pre=
-wrap;word-wrap:break-word;color:rgb(0,0,0)">Wim&#39;s mentions on cases wh=
ere the Application itself, hosted in a datacenter, would be part of the op=
tion-C interconnect, was dismissed without much discussion so far, while, i=
f we look in detail at the type of users which will even consider a complex=
 topology like model-C its most likely users and operators very familiar wi=
th MPLS VPNs in the WAN. Those type of operators will most likely be very i=
nterested in deploying MPLS or WAN-grade applications (i.e., virtual-router=
s or other VNFs) in the DC and thus its highly likely that the interconnect=
 would not terminate at the NVE itself but rather the TS (the virtual machi=
ne).</pre><pre class=3D"" style=3D"margin-bottom:0px;padding:0px;border:0px=
;font-stretch:inherit;font-size:13px;line-height:inherit;font-family:Courie=
r,&#39;Courier New&#39;,monospace;vertical-align:baseline;white-space:pre-w=
rap;word-wrap:break-word;color:rgb(0,0,0)">Also, the use of UDP ports at ra=
ndom would imply quite complex logic on the ASBR-d IMHO. Im not saying its =
impossible, but since the received packet now not only has to be received o=
n a random (though locally chosen) UDP port and this information preserved =
in the pipeline to be able to do the double-tunnel-stitching, it sounds qui=
te complex. I am sure someone in the list will mention this has already bee=
n implemented somewhere, and I won&#39;t argue with that. And let&#39;s not=
 even bring into account what this would do to any DC middlebox that now ha=
s to look at vxlan over almost any random port. We have to go back to the &=
quot;is it a 4 or is it a 6 in byte x&quot; heuristics to try to guess whet=
her the packet is vxlan or just something entirely different running over I=
P.</pre><pre class=3D"" style=3D"margin-bottom:0px;padding:0px;border:0px;f=
ont-stretch:inherit;font-size:13px;line-height:inherit;font-family:Courier,=
&#39;Courier New&#39;,monospace;vertical-align:baseline;white-space:pre-wra=
p;word-wrap:break-word;color:rgb(0,0,0)">In general I feel the proposed sol=
ution seems to be fitting of a specific use-case which is not really detail=
ed in the draft and does not describe   a solution that would &quot;elegant=
ly&quot; solve the issues at hand. It just feels like we&#39;re using any a=
vailable bit-space to stuff data into places that do not necesarily belong.=
 </pre><pre class=3D"" style=3D"margin-bottom:0px;padding:0px;border:0px;fo=
nt-stretch:inherit;font-size:13px;line-height:inherit;font-family:Courier,&=
#39;Courier New&#39;,monospace;vertical-align:baseline;white-space:pre-wrap=
;word-wrap:break-word;color:rgb(0,0,0)">Yes, MPLS encapsulations on virtual=
 switches are not yet fully available, and there can be some performance pe=
nalty on the TORs, but the solutions are much cleaner from a control and da=
ta plane point of view. Maybe I&#39;m too utopic.</pre><pre class=3D"" styl=
e=3D"margin-bottom:0px;padding:0px;border:0px;font-stretch:inherit;font-siz=
e:13px;line-height:inherit;font-family:Courier,&#39;Courier New&#39;,monosp=
ace;vertical-align:baseline;white-space:pre-wrap;word-wrap:break-word;color=
:rgb(0,0,0)"><br></pre><pre class=3D"" style=3D"margin-bottom:0px;padding:0=
px;border:0px;font-stretch:inherit;font-size:13px;line-height:inherit;font-=
family:Courier,&#39;Courier New&#39;,monospace;vertical-align:baseline;whit=
e-space:pre-wrap;word-wrap:break-word;color:rgb(0,0,0)">Best regards,</pre>=
<pre class=3D"" style=3D"margin-bottom:0px;padding:0px;border:0px;font-stre=
tch:inherit;font-size:13px;line-height:inherit;font-family:Courier,&#39;Cou=
rier New&#39;,monospace;vertical-align:baseline;white-space:pre-wrap;word-w=
rap:break-word;color:rgb(0,0,0)">Diego</pre><pre class=3D"" style=3D"margin=
-bottom:0px;padding:0px;border:0px;font-stretch:inherit;font-size:13px;line=
-height:inherit;font-family:Courier,&#39;Courier New&#39;,monospace;vertica=
l-align:baseline;white-space:pre-wrap;word-wrap:break-word;color:rgb(0,0,0)=
"><br></pre><pre class=3D"" style=3D"margin-bottom:0px;padding:0px;border:0=
px;font-stretch:inherit;font-size:13px;line-height:inherit;font-family:Cour=
ier,&#39;Courier New&#39;,monospace;vertical-align:baseline;white-space:pre=
-wrap;word-wrap:break-word;color:rgb(0,0,0)"><br></pre><pre class=3D"" styl=
e=3D"margin-bottom:0px;padding:0px;border:0px;font-stretch:inherit;font-siz=
e:13px;line-height:inherit;font-family:Courier,&#39;Courier New&#39;,monosp=
ace;vertical-align:baseline;white-space:pre-wrap;word-wrap:break-word;color=
:rgb(0,0,0)"><br></pre><pre class=3D"" style=3D"margin-bottom:0px;padding:0=
px;border:0px;font-stretch:inherit;font-size:13px;line-height:inherit;font-=
family:Courier,&#39;Courier New&#39;,monospace;vertical-align:baseline;whit=
e-space:pre-wrap;word-wrap:break-word;color:rgb(0,0,0)">-------------------=
--------------------------------------------------------------</pre><pre cl=
ass=3D"" style=3D"margin-bottom:0px;padding:0px;border:0px;font-stretch:inh=
erit;font-size:13px;line-height:inherit;font-family:Courier,&#39;Courier Ne=
w&#39;,monospace;vertical-align:baseline;white-space:pre-wrap;word-wrap:bre=
ak-word;color:rgb(0,0,0)">Hi,

The problem we are trying to solve is to reduce data center GW/ASBR-d&#39;s=
 forwarding table size, the motivation is same as traditional MPLS VPN opti=
on-C. Currently, the most common practise on ASBR-d is to terminate VXLAN e=
ncapsulation, look up local routing table, and then perform MPLS encapsulat=
ion to the WAN network. ASBR-d needs to maintain all VM&#39;s MAC/IP. In Op=
tion-C method, only transport layer information needed to be maintained at =
GW/ASBR-d, the scalability will be greatly enhanced. Traditonal Option-C is=
 only for MPLS VPN network interworking, because VXLAN is becoming pervasiv=
e in data center,  the solution in this draft was proposed for the heteroge=
neous network interworking.

The advantage of this solution is that only VXLAN encapsulation is required=
 for OVS/TOR. Unlike Wim&#39;s solution, east-west bound traffic uses VXLAN=
 encap, while north-south bound traffic uses MPLSoGRE/UDP encap.

There are two solutions in this draft:

1. Using VXLAN tunnel destination IP for stitching at ASBR-d.

No data plane modification requirements on OVS or TOR switches, only hardwa=
re changes on ASBR-d. ASBR-d normally is router, it has capability to reali=
ze the hardware changes. It will consume many IP addresses and the IP pool =
for allocation needs to be configured on ASBR-d beforehand.

2. Using VXLAN destination UDP port for stitching at ASBR-d.

Compared with solution 1, less IP address will be consumed for allocation. =
If UDP port range is too large, we can combine with solution 1 and 2.

In this solution, both data plane modification changes are needed at OVS/TO=
R and ASBR-d. ASBR-d also has capability to realize the hardware changes. F=
or OVS, it also can realize the data plane changes. For TOR switch, it norm=
ally can&#39;t realize this function.  This solution mainly focuses on pure=
 software based overlay network, it has more scalability. In public cloud d=
ata center, software based overlay network is the majority case.



Whether using solution 1 or 2 depends on the operators real envionment.



So I think our solution has no flaws, it works fine.

Thanks,

weiguo



________________________________
From: BESS [<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@ietf.org<=
/a>] on behalf of John E Drake [<a href=3D"mailto:jdrake@juniper.net">jdrak=
e@juniper.net</a>]
Sent: Wednesday, November 18, 2015 2:49
To: Henderickx, Wim (Wim); EXT - <a href=3D"mailto:thomas.morin@orange.com"=
>thomas.morin@orange.com</a>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi,

I think Wim has conclusively demonstrated that this draft has fatal flaws a=
nd I don=E2=80=99t support it.  I also agree with his suggestion that we fi=
rst figure out what problem we are trying to solve before solving it.

Yours Irrespectively,

John

From: BESS [mailto:<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@ie=
tf.org</a>] On Behalf Of Henderickx, Wim (Wim)
Sent: Tuesday, November 17, 2015 12:49 PM
To: EXT - <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.co=
m</a>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

=E2=80=94 Snip =E2=80=94

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH&gt; and how many ports simultaneously would they support? For this to wo=
rk every tenant needs a different VXLAN UDP destination port/receive port.
There might be SW elements that could do some of this, but IETF defines sol=
utions which should be implemented across the board HW/SW/etc. Even if some=
 SW switches can do this, the proposal will impose so many issues in HW/dat=
a-plane engines that I cannot be behind this solution.

To make this work generically we will have to make changes anyhow. Given th=
is, we better do it in the right way and guide the industry to a solution w=
hich does not imply those complexities. Otherwise we will stick with these =
specials forever with all consequences (bugs, etc).

- snip -

From: &quot;<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.=
com</a>&lt;mailto:<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@o=
range.com</a>&gt;&quot; &lt;<a href=3D"mailto:thomas.morin@orange.com">thom=
as.morin@orange.com</a>&lt;mailto:<a href=3D"mailto:thomas.morin@orange.com=
">thomas.morin@orange.com</a>&gt;&gt;
Organization: Orange
Date: Tuesday 17 November 2015 at 01:37
To: Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-lucent.com"=
>wim.henderickx@alcatel-lucent.com</a>&lt;mailto:<a href=3D"mailto:wim.hend=
erickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a>&gt;&gt;, B=
ESS &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&lt;mailto:<a hre=
f=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;&gt;
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim, WG,

2015-11-16, Henderickx, Wim (Wim):

2015-11-13, Henderickx, Wim (Wim):
Thomas, we can discuss forever and someone need to describe requirements, b=
ut the current proposal I cannot agree to for the reasons explained.

TM&gt; Well, although discussing forever is certainly not the goal, the rea=
sons for rejecting a proposal need to be thoroughly understood.
WH&gt; my point is what is the real driver for supporting a plain VXLAN dat=
a-plane here, the use cases I have seen in this txt is always where an appl=
ication behind a NVE/TOR is demanding option c, but none of the NVE/TOR ele=
ments.


My understanding is that the applications  are contexts where overlays are =
present is when workloads (VMs or baremetal) need to be interconnected with=
 VPNs. In these contexts, there can be reasons to want Option C to reduce t=
he state on ASBRs.

In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.

WH2&gt; can it not be all cases: TOR/vswitch/Application. I would make the =
solution flexible to support all of these not?




2015-11-13, Henderickx, Wim (Wim):

TM&gt; The right trade-off to make may in fact depend on whether you prefer=
:
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)

WH&gt; b depends on the use case

I don&#39;t get what you mean by &quot;b depends on the use case&quot;.
WH&gt; see my above comment. If the real use case is an application behind =
NVE/TOR requiring model C, than all the discussion on impact on NVE/TOR is =
void. As such I want to have a discussion on the real driver/requirement fo=
r option c interworking with an IP based Fabric.

Although I can agree than detailing requirements can always help, I don&#39=
;t think one can assume a certain application to dismiss the proposal.

WH&gt; for me the proposal is not acceptable for the reasons explained: too=
 much impact on the data-planes


I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?

WH&gt; see above. The draft right now also requires changes in existing TOR=
/NVE so for me all this discussion/debate is void.

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH&gt; and how many ports simultaneously would they support?

WH&gt; and depending on implementation you don=E2=80=99t need to change any=
 of the TOR/vswitches.

Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?

WH&gt; any proposal on the table requires changes, so for me this is not a =
valid discussion

See above, the proposal in the draft does not necessarily need changes in v=
switches.



Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems to me as making that alternate solution y=
ou suggest harder to implement.

WH&gt; I would disagree to this. Tell me which switch/TOR handles multiple =
UDP ports for VXLAN ?

I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.

-Thomas













From: Thomas Morin &lt;<a href=3D"mailto:thomas.morin@orange.com">thomas.mo=
rin@orange.com</a>&lt;mailto:<a href=3D"mailto:thomas.morin@orange.com">tho=
mas.morin@orange.com</a>&gt;&gt;
Organization: Orange
Date: Friday 13 November 2015 at 09:57
To: Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-lucent.com"=
>wim.henderickx@alcatel-lucent.com</a>&lt;mailto:<a href=3D"mailto:wim.hend=
erickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a>&gt;&gt;
Cc: &quot;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&lt;mailto:<a h=
ref=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;&quot; &lt;<a href=3D"mai=
lto:bess@ietf.org">bess@ietf.org</a>&lt;mailto:<a href=3D"mailto:bess@ietf.=
org">bess@ietf.org</a>&gt;&gt;
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim,

I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs would be operationally viable.

However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support this kind of encap,  and even software=
-based switches may not be ready to support that today).

My take is that having different options to adapt to various implementation=
s constraints we may have would have value.

(+ one question below on VXLAN...)

-Thomas


2015-11-12, Henderickx, Wim (Wim):
On VXLAN/NVGRE, do you challenge the fact that they would be used with a du=
mmy MAC address that would be replaced by the right MAC by a sender based o=
n an ARP request when needed ?


Is the above the issue you had in mind about VXLAN and NVGRE ?

WH&gt; yes

I you don&#39;t mind me asking : why do you challenge that ?





___________________________________________________________________________=
______________________________________________



Ce message et ses pieces jointes peuvent contenir des informations confiden=
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--_000_19AB2A007F56DB4E8257F949A2FB9858A97DF65Enkgeml512mbxchi_--



From nobody Wed Nov 18 08:20:48 2015
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To: Ravi Singh <ravis@juniper.net>, "bess@ietf.org" <bess@ietf.org>, "draft-singh-bess-bgp-vpls-control-flags@tools.ietf.org" <draft-singh-bess-bgp-vpls-control-flags@tools.ietf.org>, Kireeti Kompella <kireeti@juniper.net>, "senad.palislamovic@alcatel-lucent.com" <senad.palislamovic@alcatel-lucent.com>
References: <11235_1442303016_55F7CC28_11235_334_2_55F7CC27.9020002@orange.com> <15187_1444030111_5612269F_15187_570_1_5612269E.9040106@orange.com> <CO1PR05MB457388E8F9E3DF6B804C6FDAB230@CO1PR05MB457.namprd05.prod.outlook.com>
From: Thomas Morin <thomas.morin@orange.com>
Organization: Orange
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Date: Wed, 18 Nov 2015 17:19:46 +0100
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Subject: Re: [bess] Poll for adoption: draft-singh-bess-bgp-vpls-control-flags -> adopted
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Hi working group,

We have a new working group document.

Authors, can you please repost as
draft-ietf-bess-bgp-vpls-control-flags ?

Thank you,

-Thomas/Martin


2015-10-26, Ravi Singh:
> Hi Thomas, Martin
>> Before adopting this draft, we would like hear people actually experiencing pain
>> related to not solving this issue and hear about implementations in actual
>> products.
>
> In a network where some BGP-VPLS PEs have ability to insert CW and some do not, not implementing section 3 has potential to cause the PW to not come up or cause dropped packets (depending on implementation).
> Section 3 of this draft is implemented in JunOS. See last paragraph on
> http://www.juniper.net/techpubs/en_US/junos14.1/topics/concept/vpls-bgp-control-word-overview.html
> This was implemented in response to a specific-network-deployment-issue.
>
> The key aspect of RFC4761 that necessitates the text of section 3 of this draft is that the NLRI-advertising-PE is predicating on all other PEs in the same VPLS, that they must or must-not insert the CW, for example, regardless of whether they have the capability or not. [See https://tools.ietf.org/html/rfc4761#section-3.2.4]
> This is in contrast to the proposed modification (for a different purpose) where this PE is just advertising its ability (https://tools.ietf.org/html/draft-ietf-bess-fat-pw-bgp-00#section-2)
>
> The proposed text in section 3 provides a way around presumption of other-PEs' abilities.
> Section 4 provides an extension of the same intent for a deployment where the transport LSP maybe a p2mp LSP.
> Section 5 generalizes the previous sections as deployed to multi-homing scenarios.
>
> Both p2mp and multi-homing have some deployments and may run into the issue.
>
> Regards
> Ravi
>
>
>
>> -----Original Message-----
>> From: thomas.morin@orange.com [mailto:thomas.morin@orange.com]
>> Sent: Monday, October 5, 2015 12:29 AM
>> To: bess@ietf.org; draft-singh-bess-bgp-vpls-control-flags@tools.ietf.org; Ravi
>> Singh <ravis@juniper.net>; Kireeti Kompella <kireeti@juniper.net>;
>> senad.palislamovic@alcatel-lucent.com
>> Subject: Re: [bess] Poll for adoption: draft-singh-bess-bgp-vpls-control-flags
>>
>> Authors of draft-singh-bess-bgp-vpls-control-flags, working group,
>>
>> The support base for this proposal is not large.
>> Before adopting this draft, we would like hear people actually experiencing pain
>> related to not solving this issue and hear about implementations in actual
>> products.
>>
>> Let's consider this poll for adoption open until we hear more.
>>
>> Best,
>>
>> Thomas/Martin
>>
>>
>> thomas.morin@orange.com :
>>> Hello working group,
>>>
>>> This email starts a two-week poll on adopting
>>> draft-singh-bess-bgp-vpls-control-flags-01 [1] as a working group item.
>>>
>>> Please send comments to the list and state if you support adoption or
>>> not (in the later case, please also state the reasons).
>>>
>>> This poll runs until **September 29th**.
>>>
>>>
>>> *Coincidentally*, we are also polling for knowledge of any IPR that
>>> applies to this draft, to ensure that IPR has been disclosed in
>>> compliance with IETF IPR rules (see RFCs 3979, 4879, 3669 and 5378 for
>>> more details).
>>>
>>> ==> *If* you are listed as a document author or contributor please
>>> respond to this email and indicate whether or not you are aware of any
>>> relevant IPR.
>>>
>>> The draft will not be adopted until a response has been received from
>>> each author and contributor.
>>>
>>> If you are not listed as an author or contributor, then please
>>> explicitly respond only if you are aware of any IPR that has not yet
>>> been disclosed in conformance with IETF rules.
>>>
>>> Thank you,
>>>
>>> Martin & Thomas
>>> bess chairs
>>>
>>> [1]
>>> https://tools.ietf.org/html/draft-singh-bess-bgp-vpls-control-flags
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>


From nobody Wed Nov 18 14:22:53 2015
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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: Eric C Rosen <erosen@juniper.net>, "draft-ietf-bess-mvpn-extranet@ietf.org" <draft-ietf-bess-mvpn-extranet@ietf.org>
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Subject: Re: [bess] AD Review of draft-ietf-bess-mvpn-extranet-03
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On 11/17/15, 4:33 PM, "Eric C Rosen" <erosen@juniper.net> wrote:

>[Eric]  Alvaro, thanks for your review.  I just posted revision -04,
>with a number of edits made in response to your comments.

Thanks!  I've requested IETF Last Call and put the document on the
Telechat agenda.

Alvaro.


From nobody Wed Nov 18 14:46:12 2015
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Subject: [bess] Last Call: <draft-ietf-bess-mvpn-extranet-04.txt> (Extranet Multicast in BGP/IP MPLS VPNs) to Proposed Standard
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The IESG has received a request from the BGP Enabled Services WG (bess)
to consider the following document:
- 'Extranet Multicast in BGP/IP MPLS VPNs'
  <draft-ietf-bess-mvpn-extranet-04.txt> as Proposed Standard

The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action. Please send substantive comments to the
ietf@ietf.org mailing lists by 2015-12-04. Exceptionally, comments may be
sent to iesg@ietf.org instead. In either case, please retain the
beginning of the Subject line to allow automated sorting.

Abstract


   Previous RFCs specify the procedures necessary to allow IP multicast
   traffic to travel from one site to another within a BGP/MPLS IP VPN
   (Virtual Private Network).  However, it is sometimes desirable to
   allow multicast traffic whose source is in one VPN to be received by
   systems that are in another VPN.  This is known as a "Multicast VPN
   (MVPN) extranet".  This document updates RFCs 6513, 6514, and 6625 by
   specifying the procedures that are necessary in order to provide MVPN
   extranet service.




The file can be obtained via
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-extranet/

IESG discussion can be tracked via
https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-extranet/ballot/


No IPR declarations have been submitted directly on this I-D.



From nobody Thu Nov 19 01:38:49 2015
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From: Haoweiguo <haoweiguo@huawei.com>
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Thread-Topic: One question about Route-type2 usage in EVPN base protocol
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Subject: [bess] One question about Route-type2 usage in EVPN base protocol
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--_000_DD5FC8DE455C3348B94340C0AB5517334F8E5B76nkgeml501mbschi_
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Hi Co-authors,
Through ARP process, each EVPN PE can learn local connecting CE=92s MAC and=
 IP correspondence, and will notify the MAC and IP association to all remot=
e PEs through Route-type2 message. Theoretically, each remote PE can rely o=
n the single route-type2 message to populate local Mac VRF(MAC table) , ARP=
 Cache and IP VRF(IP routing table) at the same time. However, some vendor =
doesn=92t do in this way. In its implementation, each PE will notify two ro=
ute-type2 message to remote PEs, one message(say message 1) only carry MAC =
information(IP field is invalid), another message(say message 2) carry MAC =
and IP association information. The remote PEs rely on message 1 to populat=
e local MAC VRF, and rely on message 2 to populate local ARP Cache and IP V=
RF.


I think EVPN protocol should give a clear suggestion for route type-2 messa=
ge usage, what=92s the scenario to announce only one message and what=92s s=
cenario to announce two messages?



Thanks,

weiguo

--_000_DD5FC8DE455C3348B94340C0AB5517334F8E5B76nkgeml501mbschi_
Content-Type: text/html; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

<html dir=3D"ltr">
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
<meta name=3D"GENERATOR" content=3D"MSHTML 8.00.7600.17267">
<style id=3D"owaParaStyle">P {
	MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
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</style>
</head>
<body fPStyle=3D"1" ocsi=3D"0">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span lang=3D"EN-US"><=
font size=3D"3" face=3D"Times New Roman">Hi Co-authors,</font></span></p>
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span lang=3D"EN-US"><=
font size=3D"3" face=3D"Times New Roman">Through ARP process, each EVPN PE =
can learn local connecting CE=92s MAC and IP correspondence, and will notif=
y the MAC and IP association to all remote PEs
 through Route-type2 message. Theoretically, each remote PE can rely on the=
 single route-type2 message to populate local Mac VRF(MAC table) , ARP Cach=
e and IP VRF(IP routing table) at the same time. However, some vendor doesn=
=92t do in this way. In its implementation,
 each PE will notify two route-type2 message to remote PEs, one message(say=
 message 1) only carry MAC information(IP field is invalid), another messag=
e(say message 2) carry MAC and IP association information. The remote PEs r=
ely on message 1 to populate local
 MAC VRF, and rely on message 2 to populate local ARP Cache and IP VRF.</fo=
nt></span></p>
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span lang=3D"EN-US"><=
font size=3D"3" face=3D"Times New Roman"></font></span>&nbsp;</p>
<p><span style=3D"LINE-HEIGHT: 150%; LAYOUT-GRID-MODE: line; FONT-FAMILY: '=
Times New Roman','serif'; FONT-SIZE: 10.5pt; mso-fareast-font-family: &#234=
35;&#20307;; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bid=
i-language: AR-SA" lang=3D"EN-US"><font size=3D"3">I
 think EVPN protocol should give a clear suggestion for route type-2 messag=
e usage, what=92s the scenario to announce only one message and what=92s sc=
enario to announce two messages?</font></span></p>
<p><span style=3D"LINE-HEIGHT: 150%; LAYOUT-GRID-MODE: line; FONT-FAMILY: '=
Times New Roman','serif'; FONT-SIZE: 10.5pt; mso-fareast-font-family: &#234=
35;&#20307;; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bid=
i-language: AR-SA" lang=3D"EN-US"></span>&nbsp;</p>
<p><span style=3D"LINE-HEIGHT: 150%; LAYOUT-GRID-MODE: line; FONT-FAMILY: '=
Times New Roman','serif'; FONT-SIZE: 10.5pt; mso-fareast-font-family: &#234=
35;&#20307;; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bid=
i-language: AR-SA" lang=3D"EN-US"><font size=3D"3">Thanks,</font></span></p=
>
<p><span style=3D"LINE-HEIGHT: 150%; LAYOUT-GRID-MODE: line; FONT-FAMILY: '=
Times New Roman','serif'; FONT-SIZE: 10.5pt; mso-fareast-font-family: &#234=
35;&#20307;; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bid=
i-language: AR-SA" lang=3D"EN-US"><font size=3D"3">weiguo</font></span></p>
</div>
</body>
</html>

--_000_DD5FC8DE455C3348B94340C0AB5517334F8E5B76nkgeml501mbschi_--


From nobody Thu Nov 19 02:55:10 2015
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From: Thomas Morin <thomas.morin@orange.com>
Organization: Orange
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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I don't believe the discussion can be usefully summarized in terms of 
"fatal flaws".
Let me try to summarize my understanding of the thing discussed in this 
thread.

The solution in the draft has an impact on ASBR hardware due to the new 
kind of stitching required (as well summarized by Diego). Whether this 
is a big issue or not depends on the vendor. The solution in the draft, 
for the NVE part, would be implementable in software quite easily. But, 
because of the limitations in the widespread ToR chipsets for VXLAN (and 
their lack of support for MPLS/(GRE or UDP)), its multiple-UDP-port 
variant would be harder to implement in ToRs or at least not without a 
performance hit (people who know that better, feel free to correct).  
The multiple-loopback approach has operational drawbacks, but whether or 
not these are killer issues may depend on the targeted scale (in terms 
of number of NVEs) and may depend on other factors (operator practices, 
ability to automate ASBR configs).

The alternative approach, put forward by Wim, consist in using existing 
Option-C with a variant of the 3-label variant relying on an 
MPLS/MPLS/UDP-or-GRE encap (instead of the 3-label MPLS stack).  This 
approach would not necessitate new standardized procedures, would 
require less changes on ASBRs. However it is not supported today by 
vswitches or ToRs (unless the bottom MPLS label is passed to the VM, 
which I think would restrict the application to a subset of the 
scenarios for which Option C is interesting). Having it supported in 
vswitches may be a simple matter of writing the software, but ToR 
support seems to require evolution in chipsets ; whether such a support 
is likely to appear hasn't been discussed in the thread.

All in all, it seems there is no solution to cover an Option C scenario 
with today's generation ToRs, and the question for tomorrow's generation 
ToRs hasn't been really discussed.

Based on the above, I would think the question boils down to whether it 
is desirable to specify an Option C variant usable with vswitches as 
they are today and possibly usable with a performance hit with today's 
ToRs chipsets, at the expense of a required evolution on ASBRs.  The 
alternative requiring some evolution on vswitches and waiting for future 
ToRs chipsets.

-Thomas


Zhuangshunwan  :
>
> Hi Diego,
>
> Thanks for your comments. Pls see inline with [Vincent].
>
> Vincent
>
> *发件人:*BESS [mailto:bess-bounces@ietf.org] *代表 *Diego Garcia del Rio
> *发送时间:*2015年11月18日14:25
> *收件人:*bess@ietf.org
> *主题:*Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>
> Some comments from my side,
> I think the draft makes quite a few assumptions on specific 
> implementation details that are way too general to be considered 
> widely available.
> Most of the TOR devices today already pay a double-pass penalty when 
> doing routing of traffic in/out of vxlan-type tunnels. Only the newest 
> generation can route into tunnels without additional passes. And are 
> definitively limited in being able to arbitrary select UDP ports on a 
> per tunnel basis. In fact, most are even limited at using more than 
> one VNID per "service" of sorts.
> [Vincent]: Yes, the new generation BCM chipset has already supported 
> VXLAN routing without additional passes. For OVS/TOR, VXLAN 
> encapsulation is more popular than MPLSoGRE/UDP, and has better 
> performance.
> The IP-addressed based implementation which would, I assume, imply 
> assigning one or more CIDRs to a loopback interface on the ASBR-d is 
> also quite arbitrary and does not seem like a technically "clean" 
> solution. (besides burning tons of IPs). As a side-note, most PE-grade 
> routers i've worked with were quite limited in terms of IP addresses 
> used for tunnel termination and it wasn't that just a simple pool can 
> be used.
> [Vincent]: I think the larger VTEP IP address range on ASBR-d has no 
> limitations. For the hardware on ASBR-d, it has capability to 
> terminate multiple VXLAN tunnels with arbitrary destination VTEP IP 
> addresses.
> Wim's mentions on cases where the Application itself, hosted in a 
> datacenter, would be part of the option-C interconnect, was dismissed 
> without much discussion so far, while, if we look in detail at the 
> type of users which will even consider a complex topology like model-C 
> its most likely users and operators very familiar with MPLS VPNs in 
> the WAN. Those type of operators will most likely be very interested 
> in deploying MPLS or WAN-grade applications (i.e., virtual-routers or 
> other VNFs) in the DC and thus its highly likely that the interconnect 
> would not terminate at the NVE itself but rather the TS (the virtual 
> machine).
> Also, the use of UDP ports at random would imply quite complex logic 
> on the ASBR-d IMHO. Im not saying its impossible, but since the 
> received packet now not only has to be received on a random (though 
> locally chosen) UDP port and this information preserved in the 
> pipeline to be able to do the double-tunnel-stitching, it sounds quite 
> complex. I am sure someone in the list will mention this has already 
> been implemented somewhere, and I won't argue with that. And let's not 
> even bring into account what this would do to any DC middlebox that 
> now has to look at vxlan over almost any random port. We have to go 
> back to the "is it a 4 or is it a 6 in byte x" heuristics to try to 
> guess whether the packet is vxlan or just something entirely different 
> running over IP.
> [Vincent]: Using NP or multi-core CPU hardware technology, it can be 
> implemented although deeper packet inspection is needed to perform UDP 
> port and MPLS stitching.
> In general I feel the proposed solution seems to be fitting of a 
> specific use-case which is not really detailed in the draft and does 
> not describe   a solution that would "elegantly" solve the issues at 
> hand. It just feels like we're using any available bit-space to stuff 
> data into places that do not necesarily belong.
> Yes, MPLS encapsulations on virtual switches are not yet fully 
> available, and there can be some performance penalty on the TORs, but 
> the solutions are much cleaner from a control and data plane point of 
> view. Maybe I'm too utopic.
> [Vincent]: I think pure VXLAN solution has its scenario, it's general 
> rather than specific. We can't require all OVS/NVEs support VXLAN + 
> MPLSoGRE at the same time.
> Best regards,
> Diego
> ---------------------------------------------------------------------------------
> Hi,
> The problem we are trying to solve is to reduce data center 
> GW/ASBR-d's forwarding table size, the motivation is same as 
> traditional MPLS VPN option-C. Currently, the most common practise on 
> ASBR-d is to terminate VXLAN encapsulation, look up local routing 
> table, and then perform MPLS encapsulation to the WAN network. ASBR-d 
> needs to maintain all VM's MAC/IP. In Option-C method, only transport 
> layer information needed to be maintained at GW/ASBR-d, the 
> scalability will be greatly enhanced. Traditonal Option-C is only for 
> MPLS VPN network interworking, because VXLAN is becoming pervasive in 
> data center,  the solution in this draft was proposed for the 
> heterogeneous network interworking.
> The advantage of this solution is that only VXLAN encapsulation is 
> required for OVS/TOR. Unlike Wim's solution, east-west bound traffic 
> uses VXLAN encap, while north-south bound traffic uses MPLSoGRE/UDP encap.
> There are two solutions in this draft:
> 1. Using VXLAN tunnel destination IP for stitching at ASBR-d.
> No data plane modification requirements on OVS or TOR switches, only 
> hardware changes on ASBR-d. ASBR-d normally is router, it has 
> capability to realize the hardware changes. It will consume many IP 
> addresses and the IP pool for allocation needs to be configured on 
> ASBR-d beforehand.
> 2. Using VXLAN destination UDP port for stitching at ASBR-d.
> Compared with solution 1, less IP address will be consumed for 
> allocation. If UDP port range is too large, we can combine with 
> solution 1 and 2.
> In this solution, both data plane modification changes are needed at 
> OVS/TOR and ASBR-d. ASBR-d also has capability to realize the hardware 
> changes. For OVS, it also can realize the data plane changes. For TOR 
> switch, it normally can't realize this function.  This solution mainly 
> focuses on pure software based overlay network, it has more 
> scalability. In public cloud data center, software based overlay 
> network is the majority case.
> Whether using solution 1 or 2 depends on the operators real envionment.
> So I think our solution has no flaws, it works fine.
> Thanks,
> weiguo
> ________________________________
> From: BESS [bess-bounces@ietf.org <mailto:bess-bounces@ietf.org>] on 
> behalf of John E Drake [jdrake@juniper.net <mailto:jdrake@juniper.net>]
> Sent: Wednesday, November 18, 2015 2:49
> To: Henderickx, Wim (Wim); EXT - thomas.morin@orange.com 
> <mailto:thomas.morin@orange.com>; BESS
> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
> Hi,
> I think Wim has conclusively demonstrated that this draft has fatal 
> flaws and I don’t support it.  I also agree with his suggestion that 
> we first figure out what problem we are trying to solve before solving it.
> Yours Irrespectively,
> John
> From: BESS [mailto:bess-bounces@ietf.org 
> <mailto:bess-bounces@ietf.org>] On Behalf Of Henderickx, Wim (Wim)
> Sent: Tuesday, November 17, 2015 12:49 PM
> To: EXT - thomas.morin@orange.com <mailto:thomas.morin@orange.com>; BESS
> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
> — Snip —
> No, the spec as it is can be implemented in its VXLAN variant with 
> existing vswitches (e.g. OVS allows to choose the VXLAN destination 
> port, ditto for the linux kernel stack).
> (ToR is certainly another story, most of them not having a flexible 
> enough VXLAN dataplane nor support for any MPLS-over-IP.)
> WH> and how many ports simultaneously would they support? For this to 
> work every tenant needs a different VXLAN UDP destination port/receive 
> port.
> There might be SW elements that could do some of this, but IETF 
> defines solutions which should be implemented across the board 
> HW/SW/etc. Even if some SW switches can do this, the proposal will 
> impose so many issues in HW/data-plane engines that I cannot be behind 
> this solution.
> To make this work generically we will have to make changes anyhow. 
> Given this, we better do it in the right way and guide the industry to 
> a solution which does not imply those complexities. Otherwise we will 
> stick with these specials forever with all consequences (bugs, etc).
> - snip -
> From: "thomas.morin@orange.com 
> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com 
> <mailto:thomas.morin@orange.com>>" <thomas.morin@orange.com 
> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com 
> <mailto:thomas.morin@orange.com>>>
> Organization: Orange
> Date: Tuesday 17 November 2015 at 01:37
> To: Wim Henderickx <wim.henderickx@alcatel-lucent.com 
> <mailto:wim.henderickx@alcatel-lucent.com><mailto:wim.henderickx@alcatel-lucent.com 
> <mailto:wim.henderickx@alcatel-lucent.com>>>, BESS <bess@ietf.org 
> <mailto:bess@ietf.org><mailto:bess@ietf.org <mailto:bess@ietf.org>>>
> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
> Hi Wim, WG,
> 2015-11-16, Henderickx, Wim (Wim):
> 2015-11-13, Henderickx, Wim (Wim):
> Thomas, we can discuss forever and someone need to describe 
> requirements, but the current proposal I cannot agree to for the 
> reasons explained.
> TM> Well, although discussing forever is certainly not the goal, the 
> reasons for rejecting a proposal need to be thoroughly understood.
> WH> my point is what is the real driver for supporting a plain VXLAN 
> data-plane here, the use cases I have seen in this txt is always where 
> an application behind a NVE/TOR is demanding option c, but none of the 
> NVE/TOR elements.
> My understanding is that the applications  are contexts where overlays 
> are present is when workloads (VMs or baremetal) need to be 
> interconnected with VPNs. In these contexts, there can be reasons to 
> want Option C to reduce the state on ASBRs.
> In these context, its not the workload (VM or baremetal) that would 
> typically handle VRFs, but really the vswitch or ToR.
> WH2> can it not be all cases: TOR/vswitch/Application. I would make 
> the solution flexible to support all of these not?
> 2015-11-13, Henderickx, Wim (Wim):
> TM> The right trade-off to make may in fact depend on whether you prefer:
> (a) a new dataplane stitching behavior on DC ASBRs (the behavior 
> specified in this draft)
> or (b) an evolution of the encaps on the vswitches and ToRs to support 
> MPLS/MPLS/(UDP or GRE)
> WH> b depends on the use case
> I don't get what you mean by "b depends on the use case".
> WH> see my above comment. If the real use case is an application 
> behind NVE/TOR requiring model C, than all the discussion on impact on 
> NVE/TOR is void. As such I want to have a discussion on the real 
> driver/requirement for option c interworking with an IP based Fabric.
> Although I can agree than detailing requirements can always help, I 
> don't think one can assume a certain application to dismiss the proposal.
> WH> for me the proposal is not acceptable for the reasons explained: 
> too much impact on the data-planes
> I wrote the above based on the idea that the encap used in 
> MPLS/MPLS/(UDP or GRE), which hence has to be supported on the ToRs 
> and vswitches.
> Another possibility would be service-label/middle-label/Ethernet 
> assuming an L2 adjacency between vswitches/ToRs and ASBRs, but this 
> certainly does not match your typical DC architecture. Or perhaps had 
> you something else in mind ?
> WH> see above. The draft right now also requires changes in existing 
> TOR/NVE so for me all this discussion/debate is void.
> No, the spec as it is can be implemented in its VXLAN variant with 
> existing vswitches (e.g. OVS allows to choose the VXLAN destination 
> port, ditto for the linux kernel stack).
> (ToR is certainly another story, most of them not having a flexible 
> enough VXLAN dataplane nor support for any MPLS-over-IP.)
> WH> and how many ports simultaneously would they support?
> WH> and depending on implementation you don’t need to change any of 
> the TOR/vswitches.
> Does this mean that for some implementations you may not need to 
> change any of the TOR/vswitches, but that for some others you may ?
> WH> any proposal on the table requires changes, so for me this is not 
> a valid discussion
> See above, the proposal in the draft does not necessarily need changes 
> in vswitches.
> Let me take a practical example : while I can quite easily see how to 
> implement the procedures in draft-hao-bess-inter-nvo3-vpn-optionc 
> based on current vswitch implementations of VXLAN, the lack of 
> MPLS/MPLS/(UDP, GRE) support in commonplace vswitches seems to me as 
> making that alternate solution you suggest harder to implement.
> WH> I would disagree to this. Tell me which switch/TOR handles 
> multiple UDP ports for VXLAN ?
> I mentioned _v_switches, and many do support a variable destination 
> port for VXLAN, which is sufficient to implement what the draft proposes.
> -Thomas
> From: Thomas Morin <thomas.morin@orange.com 
> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com 
> <mailto:thomas.morin@orange.com>>>
> Organization: Orange
> Date: Friday 13 November 2015 at 09:57
> To: Wim Henderickx <wim.henderickx@alcatel-lucent.com 
> <mailto:wim.henderickx@alcatel-lucent.com><mailto:wim.henderickx@alcatel-lucent.com 
> <mailto:wim.henderickx@alcatel-lucent.com>>>
> Cc: "bess@ietf.org <mailto:bess@ietf.org><mailto:bess@ietf.org 
> <mailto:bess@ietf.org>>" <bess@ietf.org 
> <mailto:bess@ietf.org><mailto:bess@ietf.org <mailto:bess@ietf.org>>>
> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
> Hi Wim,
> I agree on the analysis that this proposal is restricted to 
> implementations that supports the chosen encap with non-IANA ports 
> (which may be hard to achieve for instance on hardware 
> implementations, as you suggest), or to context where managing 
> multiple IPs would be operationally viable.
> However, it does not seem obvious to me how the alternative you 
> propose [relying on 3-label option C with an MPLS/MPLS/(UDP|GRE) 
> encap] addresses the issue of whether the encap behavior is supported 
> or not (e.g. your typical ToR chipset possibly may not support this 
> kind of encap,  and even software-based switches may not be ready to 
> support that today).
> My take is that having different options to adapt to various 
> implementations constraints we may have would have value.
> (+ one question below on VXLAN...)
> -Thomas
> 2015-11-12, Henderickx, Wim (Wim):
> On VXLAN/NVGRE, do you challenge the fact that they would be used with 
> a dummy MAC address that would be replaced by the right MAC by a 
> sender based on an ARP request when needed ?
> Is the above the issue you had in mind about VXLAN and NVGRE ?
> WH> yes
> I you don't mind me asking : why do you challenge that ?
>


From nobody Thu Nov 19 07:03:41 2015
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From: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>
To: Thomas Morin <thomas.morin@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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From: "UTTARO, JAMES" <ju1738@att.com>
To: Haoweiguo <haoweiguo@huawei.com>, John E Drake <jdrake@juniper.net>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, BESS <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Archived-At: <http://mailarchive.ietf.org/arch/msg/bess/KJRKLkh__oGU1M0cLR4xkou3Bu0>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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--_000_B17A6910EEDD1F45980687268941550F0CD4D2A4MISOUT7MSGUSRCD_
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A concern I have with this draft is that it pre-supposes the network archit=
ecture in terms of how DCs and WAN are connected. It assumes that DCs and W=
AN networks are in different AS domains. Why is that??

Jim Uttaro

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Haoweiguo
Sent: Tuesday, November 17, 2015 11:24 PM
To: John E Drake; Henderickx, Wim (Wim); EXT - thomas.morin@orange.com; BES=
S
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc


Hi,

The problem we are trying to solve is to reduce data center GW/ASBR-d's for=
warding table size, the motivation is same as traditional MPLS VPN option-C=
. Currently, the most common practise on ASBR-d is to terminate VXLAN encap=
sulation, look up local routing table, and then perform MPLS encapsulation =
to the WAN network. ASBR-d needs to maintain all VM's MAC/IP. In Option-C m=
ethod, only transport layer information needed to be maintained at GW/ASBR-=
d, the scalability will be greatly enhanced. Traditonal Option-C is only fo=
r MPLS VPN network interworking, because VXLAN is becoming pervasive in dat=
a center,  the solution in this draft was proposed for the heterogeneous ne=
twork interworking.

The advantage of this solution is that only VXLAN encapsulation is required=
 for OVS/TOR. Unlike Wim's solution, east-west bound traffic uses VXLAN enc=
ap, while north-south bound traffic uses MPLSoGRE/UDP encap.

There are two solutions in this draft:

1. Using VXLAN tunnel destination IP for stitching at ASBR-d.

No data plane modification requirements on OVS or TOR switches, only hardwa=
re changes on ASBR-d. ASBR-d normally is router, it has capability to reali=
ze the hardware changes. It will consume many IP addresses and the IP pool =
for allocation needs to be configured on ASBR-d beforehand.

2. Using VXLAN destination UDP port for stitching at ASBR-d.

Compared with solution 1, less IP address will be consumed for allocation. =
If UDP port range is too large, we can combine with solution 1 and 2.

In this solution, both data plane modification changes are needed at OVS/TO=
R and ASBR-d. ASBR-d also has capability to realize the hardware changes. F=
or OVS, it also can realize the data plane changes. For TOR switch, it norm=
ally can't realize this function.  This solution mainly focuses on pure sof=
tware based overlay network, it has more scalability. In public cloud data =
center, software based overlay network is the majority case.



Whether using solution 1 or 2 depends on the operators real envionment.



So I think our solution has no flaws, it works fine.

Thanks,

weiguo



________________________________
From: BESS [bess-bounces@ietf.org] on behalf of John E Drake [jdrake@junipe=
r.net]
Sent: Wednesday, November 18, 2015 2:49
To: Henderickx, Wim (Wim); EXT - thomas.morin@orange.com<mailto:thomas.mori=
n@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
Hi,

I think Wim has conclusively demonstrated that this draft has fatal flaws a=
nd I don't support it.  I also agree with his suggestion that we first figu=
re out what problem we are trying to solve before solving it.

Yours Irrespectively,

John

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Tuesday, November 17, 2015 12:49 PM
To: EXT - thomas.morin@orange.com<mailto:thomas.morin@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

- Snip -

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support? For this to work =
every tenant needs a different VXLAN UDP destination port/receive port.
There might be SW elements that could do some of this, but IETF defines sol=
utions which should be implemented across the board HW/SW/etc. Even if some=
 SW switches can do this, the proposal will impose so many issues in HW/dat=
a-plane engines that I cannot be behind this solution.

To make this work generically we will have to make changes anyhow. Given th=
is, we better do it in the right way and guide the industry to a solution w=
hich does not imply those complexities. Otherwise we will stick with these =
specials forever with all consequences (bugs, etc).

- snip -

From: "thomas.morin@orange.com<mailto:thomas.morin@orange.com>" <thomas.mor=
in@orange.com<mailto:thomas.morin@orange.com>>
Organization: Orange
Date: Tuesday 17 November 2015 at 01:37
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, BESS <bess@ietf.org<mailto:bess@ietf.org>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim, WG,

2015-11-16, Henderickx, Wim (Wim):

2015-11-13, Henderickx, Wim (Wim):
Thomas, we can discuss forever and someone need to describe requirements, b=
ut the current proposal I cannot agree to for the reasons explained.

TM> Well, although discussing forever is certainly not the goal, the reason=
s for rejecting a proposal need to be thoroughly understood.
WH> my point is what is the real driver for supporting a plain VXLAN data-p=
lane here, the use cases I have seen in this txt is always where an applica=
tion behind a NVE/TOR is demanding option c, but none of the NVE/TOR elemen=
ts.


My understanding is that the applications  are contexts where overlays are =
present is when workloads (VMs or baremetal) need to be interconnected with=
 VPNs. In these contexts, there can be reasons to want Option C to reduce t=
he state on ASBRs.

In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.

WH2> can it not be all cases: TOR/vswitch/Application. I would make the sol=
ution flexible to support all of these not?



2015-11-13, Henderickx, Wim (Wim):

TM> The right trade-off to make may in fact depend on whether you prefer:
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)

WH> b depends on the use case

I don't get what you mean by "b depends on the use case".
WH> see my above comment. If the real use case is an application behind NVE=
/TOR requiring model C, than all the discussion on impact on NVE/TOR is voi=
d. As such I want to have a discussion on the real driver/requirement for o=
ption c interworking with an IP based Fabric.

Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.

WH> for me the proposal is not acceptable for the reasons explained: too mu=
ch impact on the data-planes

I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?

WH> see above. The draft right now also requires changes in existing TOR/NV=
E so for me all this discussion/debate is void.

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support?

WH> and depending on implementation you don't need to change any of the TOR=
/vswitches.

Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?

WH> any proposal on the table requires changes, so for me this is not a val=
id discussion

See above, the proposal in the draft does not necessarily need changes in v=
switches.


Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems to me as making that alternate solution y=
ou suggest harder to implement.

WH> I would disagree to this. Tell me which switch/TOR handles multiple UDP=
 ports for VXLAN ?

I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.

-Thomas










From: Thomas Morin <thomas.morin@orange.com<mailto:thomas.morin@orange.com>=
>
Organization: Orange
Date: Friday 13 November 2015 at 09:57
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim,

I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs would be operationally viable.

However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support this kind of encap,  and even software=
-based switches may not be ready to support that today).

My take is that having different options to adapt to various implementation=
s constraints we may have would have value.

(+ one question below on VXLAN...)

-Thomas


2015-11-12, Henderickx, Wim (Wim):
On VXLAN/NVGRE, do you challenge the fact that they would be used with a du=
mmy MAC address that would be replaced by the right MAC by a sender based o=
n an ARP request when needed ?

Is the above the issue you had in mind about VXLAN and NVGRE ?

WH> yes

I you don't mind me asking : why do you challenge that ?




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</head>
<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">A concern I have wi=
th this draft is that it pre-supposes the network architecture in terms of =
how DCs and WAN are connected. It assumes that DCs and WAN
 networks are in different AS domains. Why is that?? &nbsp;<o:p></o:p></spa=
n></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Jim Uttaro<o:p></o:=
p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> BESS [ma=
ilto:bess-bounces@ietf.org]
<b>On Behalf Of </b>Haoweiguo<br>
<b>Sent:</b> Tuesday, November 17, 2015 11:24 PM<br>
<b>To:</b> John E Drake; Henderickx, Wim (Wim); EXT - thomas.morin@orange.c=
om; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Hi,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">The problem we are trying to solve is to reduce data center GW/A=
SBR-d's forwarding table size, the motivation is same as traditional MPLS V=
PN option-C. Currently, the most common practise on ASBR-d
 is to terminate VXLAN encapsulation, look up local routing table, and then=
 perform MPLS encapsulation to the WAN network. ASBR-d needs to maintain al=
l VM's MAC/IP. In Option-C method, only transport layer information needed =
to be maintained at GW/ASBR-d, the
 scalability will be greatly enhanced. Traditonal Option-C is only for MPLS=
 VPN network interworking, because VXLAN is becoming pervasive in data cent=
er,&nbsp; the solution in this draft was proposed for the heterogeneous net=
work interworking.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">The advantage of this solution is that only VXLAN encapsulation =
is required for OVS/TOR. Unlike Wim's solution, east-west bound traffic use=
s VXLAN encap, while north-south bound traffic uses MPLSoGRE/UDP
 encap.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">There are two solutions in this draft:<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">1. Using VXLAN tunnel destination IP for stitching at ASBR-d.<o:=
p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">No data plane modification requirements on OVS or TOR switches, =
only hardware changes on ASBR-d. ASBR-d normally is router, it has capabili=
ty to realize the hardware changes. It will consume many
 IP addresses and the IP pool for allocation needs to be configured on ASBR=
-d beforehand.
<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">2. Using VXLAN destination UDP port for stitching at ASBR-d.<o:p=
></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Compared with solution 1, less IP address will be consumed for a=
llocation. If UDP port range is too large, we can combine with solution 1 a=
nd 2.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">In this solution, both data plane modification changes are neede=
d at OVS/TOR and ASBR-d. ASBR-d also has capability to realize the hardware=
 changes. For OVS, it also can realize the data plane
 changes. For TOR switch,&nbsp;it normally can't realize this function.&nbs=
p; This solution mainly focuses on pure software based overlay network, it =
has more scalability. In public cloud data center, software based overlay n=
etwork is the majority case.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">&nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Whether using solution 1 or 2 depends on the operators real envi=
onment.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">&nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">So I think our solution has no flaws, it works fine.
<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Thanks,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">weiguo<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">&nbsp;</span><span style=3D"font-size:10.0pt;font-family:&quot;T=
ahoma&quot;,&quot;sans-serif&quot;;color:black"><o:p></o:p></span></p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"color:black">
<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
<div id=3D"divRpF197338">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:b=
lack">From:</span></b><span style=3D"font-size:10.0pt;font-family:&quot;Tah=
oma&quot;,&quot;sans-serif&quot;;color:black"> BESS [bess-bounces@ietf.org]=
 on behalf
 of John E Drake [jdrake@juniper.net]<br>
<b>Sent:</b> Wednesday, November 18, 2015 2:49<br>
<b>To:</b> Henderickx, Wim (Wim); EXT - <a href=3D"mailto:thomas.morin@oran=
ge.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Hi,</span><span style=3D"=
color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">I think Wim has conclusiv=
ely demonstrated that this draft has fatal flaws and I don&#8217;t support =
it.&nbsp; I also agree with his suggestion that we first figure out
 what problem we are trying to solve before solving it.</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> BESS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bes=
s-bounces@ietf.org</a>]
<b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
<b>Sent:</b> Tuesday, November 17, 2015 12:49 PM<br>
<b>To:</b> EXT - <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@or=
ange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&#8212; Snip &#8212;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">No, the spec as it is can b=
e implemented in its VXLAN variant with existing vswitches (e.g. OVS allows=
 to choose the VXLAN destination port, ditto for the linux
 kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; and how many ports s=
imultaneously would they support? For this to work every tenant needs a dif=
ferent VXLAN UDP destination port/receive port.&nbsp;</span><span style=3D"=
color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">There might be SW elements =
that could do some of this, but IETF defines solutions which should be impl=
emented across the board HW/SW/etc. Even if some SW switches
 can do this, the proposal will impose so many issues in HW/data-plane engi=
nes that I cannot be behind this solution.&nbsp;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">To make this work generical=
ly we will have to make changes anyhow. Given this, we better do it in the =
right way and guide the industry to a solution which does
 not imply those complexities. Otherwise we will stick with these specials =
forever with all consequences (bugs, etc).</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">- snip -</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&=
quot;;color:black">&quot;<a href=3D"mailto:thomas.morin@orange.com" target=
=3D"_blank">thomas.morin@orange.com</a>&quot; &lt;<a href=3D"mailto:thomas.=
morin@orange.com" target=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Tuesday 17 November 2015 at 01:37<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;, BESS &=
lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;=
<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi Wim, WG,<br>
<br>
2015-11-16, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
2015-11-13, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thomas, we can discuss fore=
ver and someone need to describe requirements, but the current proposal I c=
annot agree to for the reasons explained.</span><span style=3D"color:black"=
><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
TM&gt; Well, although discussing forever is certainly not the goal, the rea=
sons for rejecting a proposal need to be thoroughly understood.</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; my point is what is =
the real driver for supporting a plain VXLAN data-plane here, the use cases=
 I have seen in this txt is always where an application behind
 a NVE/TOR is demanding option c, but none of the NVE/TOR elements.</span><=
span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
My understanding is that the applications&nbsp; are contexts where overlays=
 are present is when workloads (VMs or baremetal) need to be interconnected=
 with VPNs. In these contexts, there can be reasons to want Option C to red=
uce the state on ASBRs.<br>
<br>
In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH2&gt; can it not be all c=
ases: TOR/vswitch/Application. I would make the solution flexible to suppor=
t all of these not?</span><span style=3D"color:black"><o:p></o:p></span></p=
>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">2015-11-13, Henderickx, Wim=
 (Wim):</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
TM&gt; The right trade-off to make may in fact depend on whether you prefer=
:<br>
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)<br>
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; b depends on the use=
 case
</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
I don't get what you mean by &quot;b depends on the use case&quot;. </span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; see my above comment=
. If the real use case is an application behind NVE/TOR requiring model C, =
than all the discussion on impact on NVE/TOR is void. As such
 I want to have a discussion on the real driver/requirement for option c in=
terworking with an IP based Fabric.</span><span style=3D"color:black"><o:p>=
</o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.<br>
<br>
WH&gt; for me the proposal is not acceptable for the reasons explained: too=
 much impact on the data-planes</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.<br>
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; see above. The draft=
 right now also requires changes in existing TOR/NVE so for me all this dis=
cussion/debate is void.</span><span style=3D"color:black"><o:p></o:p></span=
></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; and how many ports s=
imultaneously would they support?</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; and depending on imp=
lementation you don&#8217;t need to change any of the TOR/vswitches.</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; any proposal on the =
table requires changes, so for me this is not a valid discussion</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
See above, the proposal in the draft does not necessarily need changes in v=
switches.<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems
 to me as making that alternate solution you suggest harder to implement.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; I would disagree to =
this. Tell me which switch/TOR handles multiple UDP ports for VXLAN ?</span=
><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.<br>
<br>
-Thomas<br>
<br>
<br>
<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
<br>
<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&=
quot;;color:black">Thomas Morin &lt;<a href=3D"mailto:thomas.morin@orange.c=
om" target=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Friday 13 November 2015 at 09:57<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi Wim,<br>
<br>
I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs
 would be operationally viable.&nbsp;&nbsp; <br>
<br>
However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support
 this kind of encap,&nbsp; and even software-based switches may not be read=
y to support that today).<br>
<br>
My take is that having different options to adapt to various implementation=
s constraints we may have would have value.<br>
<br>
(&#43; one question below on VXLAN...)<br>
<br>
-Thomas<br>
<br>
<br>
2015-11-12, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck">On VXLAN/NVGRE, do you challenge the fact that they would be used with =
a dummy MAC address that would be replaced by the right MAC
 by a sender based on an ARP request when needed ?</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
Is the above the issue you had in mind about VXLAN and NVGRE ?</span><span =
style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; yes</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
I you don't mind me asking : why do you challenge that ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<pre><span style=3D"color:black">__________________________________________=
___________________________________________________________________________=
____<o:p></o:p></span></pre>
<pre><span style=3D"color:black">&nbsp;<o:p></o:p></span></pre>
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From: Diego Garcia del Rio <diego@nuagenetworks.net>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>
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Cc: Thomas Morin <thomas.morin@orange.com>, "bess@ietf.org" <bess@ietf.org>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Hi Weiguo,

If we're really talking about a public cloud operator where MOST of the
endpoints would be software, interconnecting DC and WAN environments seems
pretty blunt to be honest. You're going to be leaking every single /32 IP
address of the virtual machines into the wide area and most carriers tend
to avoid that kind of thing since its quite disrutptive in terms of
scalability.

Furthermore, wim's proposal does NOT imply changes on the east-west traffic
patterns. Those would remain on vxlan or whatever new encapsulation we
manage to come up with at NVO3.

Model C interconnect presuposes a high trust relationship between both
parties, and if the cloud and WAN are operated by the same company, that is
valid.

Finally, as wim also mentions, the issue of the globally allocated VNIDs is
quite an issue. This affects the existing TORs since now all the WAN PEs
would have to organize themselves not to ever allocate overlapping labels
(then converted to VNIDs) since the DC gear today cannot handle using the
same VNID on different "services".

Again, you dismiss the top of racks, but I don't think we can propose a
standard that just simply ignores a good chunk of the DC space.

And at the same time, all the DC edge routers where we propose to implement
these complex mapping have larger and larger scaling tables with route
capacities in the order of millions of prefixes these days. And while model
A has the burden of provisioning the DC edge with the VRF instance, the
fact it can do prefix lookups means it doesnt need to leak every single /32
to the wide area and instead expose the aggregates.

Best Regards,




On Thu, Nov 19, 2015 at 7:02 AM, Henderickx, Wim (Wim) <
wim.henderickx@alcatel-lucent.com> wrote:

> Thomas, thx for the time summarising this and great summary.
>
>
>
>
> On 19/11/15 02:52, "BESS on behalf of Thomas Morin" <bess-bounces@ietf.or=
g
> on behalf of thomas.morin@orange.com> wrote:
>
> >I don't believe the discussion can be usefully summarized in terms of
> >"fatal flaws".
> >Let me try to summarize my understanding of the thing discussed in this
> >thread.
> >
> >The solution in the draft has an impact on ASBR hardware due to the new
> >kind of stitching required (as well summarized by Diego). Whether this
> >is a big issue or not depends on the vendor. The solution in the draft,
> >for the NVE part, would be implementable in software quite easily. But,
> >because of the limitations in the widespread ToR chipsets for VXLAN (and
> >their lack of support for MPLS/(GRE or UDP)), its multiple-UDP-port
> >variant would be harder to implement in ToRs or at least not without a
> >performance hit (people who know that better, feel free to correct).
>
> WH> some HW cannot do this at all, so lets dismiss this idea.
>
> >The multiple-loopback approach has operational drawbacks, but whether or
> >not these are killer issues may depend on the targeted scale (in terms
> >of number of NVEs) and may depend on other factors (operator practices,
> >ability to automate ASBR configs).
>
> WH> ok now we have not discussed the constraints some HW vendors have wit=
h
> respect to global VNIDs. To make this work all VNID/Labels need to be
> globally unique. Hmmmmm
>
> >
> >The alternative approach, put forward by Wim, consist in using existing
> >Option-C with a variant of the 3-label variant relying on an
> >MPLS/MPLS/UDP-or-GRE encap (instead of the 3-label MPLS stack).  This
> >approach would not necessitate new standardized procedures, would
> >require less changes on ASBRs. However it is not supported today by
> >vswitches or ToRs (unless the bottom MPLS label is passed to the VM,
> >which I think would restrict the application to a subset of the
> >scenarios for which Option C is interesting). Having it supported in
> >vswitches may be a simple matter of writing the software, but ToR
> >support seems to require evolution in chipsets ; whether such a support
> >is likely to appear hasn't been discussed in the thread.
> >
> >All in all, it seems there is no solution to cover an Option C scenario
> >with today's generation ToRs, and the question for tomorrow's generation
> >ToRs hasn't been really discussed.
> >
> >Based on the above, I would think the question boils down to whether it
> >is desirable to specify an Option C variant usable with vswitches as
> >they are today and possibly usable with a performance hit with today's
> >ToRs chipsets, at the expense of a required evolution on ASBRs.  The
> >alternative requiring some evolution on vswitches and waiting for future
> >ToRs chipsets.
>
> WH> I vote for a an evolution of switches/TORs that have proper support
> for this.
> I hope some HW vendors of TOR chips shime in, but I am told the MPLS
> solution is possible in the next generation chips they are working on.
>
> The other options requires baggage forever on the ASBR elements that does
> not bring value and it is better to avoid this and build an architecture
> which is future proof and more cost effective. My 2 cents
> >
> >-Thomas
> >
> >
> >Zhuangshunwan  :
> >>
> >> Hi Diego,
> >>
> >> Thanks for your comments. Pls see inline with [Vincent].
> >>
> >> Vincent
> >>
> >> *=E5=8F=91=E4=BB=B6=E4=BA=BA:*BESS [mailto:bess-bounces@ietf.org] *=E4=
=BB=A3=E8=A1=A8 *Diego Garcia del Rio
> >> *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4:*2015=E5=B9=B411=E6=9C=8818=E6=
=97=A514:25
> >> *=E6=94=B6=E4=BB=B6=E4=BA=BA:*bess@ietf.org
> >> *=E4=B8=BB=E9=A2=98:*Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
> >>
> >> Some comments from my side,
> >> I think the draft makes quite a few assumptions on specific
> >> implementation details that are way too general to be considered
> >> widely available.
> >> Most of the TOR devices today already pay a double-pass penalty when
> >> doing routing of traffic in/out of vxlan-type tunnels. Only the newest
> >> generation can route into tunnels without additional passes. And are
> >> definitively limited in being able to arbitrary select UDP ports on a
> >> per tunnel basis. In fact, most are even limited at using more than
> >> one VNID per "service" of sorts.
> >> [Vincent]: Yes, the new generation BCM chipset has already supported
> >> VXLAN routing without additional passes. For OVS/TOR, VXLAN
> >> encapsulation is more popular than MPLSoGRE/UDP, and has better
> >> performance.
> >> The IP-addressed based implementation which would, I assume, imply
> >> assigning one or more CIDRs to a loopback interface on the ASBR-d is
> >> also quite arbitrary and does not seem like a technically "clean"
> >> solution. (besides burning tons of IPs). As a side-note, most PE-grade
> >> routers i've worked with were quite limited in terms of IP addresses
> >> used for tunnel termination and it wasn't that just a simple pool can
> >> be used.
> >> [Vincent]: I think the larger VTEP IP address range on ASBR-d has no
> >> limitations. For the hardware on ASBR-d, it has capability to
> >> terminate multiple VXLAN tunnels with arbitrary destination VTEP IP
> >> addresses.
> >> Wim's mentions on cases where the Application itself, hosted in a
> >> datacenter, would be part of the option-C interconnect, was dismissed
> >> without much discussion so far, while, if we look in detail at the
> >> type of users which will even consider a complex topology like model-C
> >> its most likely users and operators very familiar with MPLS VPNs in
> >> the WAN. Those type of operators will most likely be very interested
> >> in deploying MPLS or WAN-grade applications (i.e., virtual-routers or
> >> other VNFs) in the DC and thus its highly likely that the interconnect
> >> would not terminate at the NVE itself but rather the TS (the virtual
> >> machine).
> >> Also, the use of UDP ports at random would imply quite complex logic
> >> on the ASBR-d IMHO. Im not saying its impossible, but since the
> >> received packet now not only has to be received on a random (though
> >> locally chosen) UDP port and this information preserved in the
> >> pipeline to be able to do the double-tunnel-stitching, it sounds quite
> >> complex. I am sure someone in the list will mention this has already
> >> been implemented somewhere, and I won't argue with that. And let's not
> >> even bring into account what this would do to any DC middlebox that
> >> now has to look at vxlan over almost any random port. We have to go
> >> back to the "is it a 4 or is it a 6 in byte x" heuristics to try to
> >> guess whether the packet is vxlan or just something entirely different
> >> running over IP.
> >> [Vincent]: Using NP or multi-core CPU hardware technology, it can be
> >> implemented although deeper packet inspection is needed to perform UDP
> >> port and MPLS stitching.
> >> In general I feel the proposed solution seems to be fitting of a
> >> specific use-case which is not really detailed in the draft and does
> >> not describe   a solution that would "elegantly" solve the issues at
> >> hand. It just feels like we're using any available bit-space to stuff
> >> data into places that do not necesarily belong.
> >> Yes, MPLS encapsulations on virtual switches are not yet fully
> >> available, and there can be some performance penalty on the TORs, but
> >> the solutions are much cleaner from a control and data plane point of
> >> view. Maybe I'm too utopic.
> >> [Vincent]: I think pure VXLAN solution has its scenario, it's general
> >> rather than specific. We can't require all OVS/NVEs support VXLAN +
> >> MPLSoGRE at the same time.
> >> Best regards,
> >> Diego
> >>
> -------------------------------------------------------------------------=
--------
> >> Hi,
> >> The problem we are trying to solve is to reduce data center
> >> GW/ASBR-d's forwarding table size, the motivation is same as
> >> traditional MPLS VPN option-C. Currently, the most common practise on
> >> ASBR-d is to terminate VXLAN encapsulation, look up local routing
> >> table, and then perform MPLS encapsulation to the WAN network. ASBR-d
> >> needs to maintain all VM's MAC/IP. In Option-C method, only transport
> >> layer information needed to be maintained at GW/ASBR-d, the
> >> scalability will be greatly enhanced. Traditonal Option-C is only for
> >> MPLS VPN network interworking, because VXLAN is becoming pervasive in
> >> data center,  the solution in this draft was proposed for the
> >> heterogeneous network interworking.
> >> The advantage of this solution is that only VXLAN encapsulation is
> >> required for OVS/TOR. Unlike Wim's solution, east-west bound traffic
> >> uses VXLAN encap, while north-south bound traffic uses MPLSoGRE/UDP
> encap.
> >> There are two solutions in this draft:
> >> 1. Using VXLAN tunnel destination IP for stitching at ASBR-d.
> >> No data plane modification requirements on OVS or TOR switches, only
> >> hardware changes on ASBR-d. ASBR-d normally is router, it has
> >> capability to realize the hardware changes. It will consume many IP
> >> addresses and the IP pool for allocation needs to be configured on
> >> ASBR-d beforehand.
> >> 2. Using VXLAN destination UDP port for stitching at ASBR-d.
> >> Compared with solution 1, less IP address will be consumed for
> >> allocation. If UDP port range is too large, we can combine with
> >> solution 1 and 2.
> >> In this solution, both data plane modification changes are needed at
> >> OVS/TOR and ASBR-d. ASBR-d also has capability to realize the hardware
> >> changes. For OVS, it also can realize the data plane changes. For TOR
> >> switch, it normally can't realize this function.  This solution mainly
> >> focuses on pure software based overlay network, it has more
> >> scalability. In public cloud data center, software based overlay
> >> network is the majority case.
> >> Whether using solution 1 or 2 depends on the operators real envionment=
.
> >> So I think our solution has no flaws, it works fine.
> >> Thanks,
> >> weiguo
> >> ________________________________
> >> From: BESS [bess-bounces@ietf.org <mailto:bess-bounces@ietf.org>] on
> >> behalf of John E Drake [jdrake@juniper.net <mailto:jdrake@juniper.net>=
]
> >> Sent: Wednesday, November 18, 2015 2:49
> >> To: Henderickx, Wim (Wim); EXT - thomas.morin@orange.com
> >> <mailto:thomas.morin@orange.com>; BESS
> >> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
> >> Hi,
> >> I think Wim has conclusively demonstrated that this draft has fatal
> >> flaws and I don=E2=80=99t support it.  I also agree with his suggestio=
n that
> >> we first figure out what problem we are trying to solve before solving
> it.
> >> Yours Irrespectively,
> >> John
> >> From: BESS [mailto:bess-bounces@ietf.org
> >> <mailto:bess-bounces@ietf.org>] On Behalf Of Henderickx, Wim (Wim)
> >> Sent: Tuesday, November 17, 2015 12:49 PM
> >> To: EXT - thomas.morin@orange.com <mailto:thomas.morin@orange.com>;
> BESS
> >> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
> >> =E2=80=94 Snip =E2=80=94
> >> No, the spec as it is can be implemented in its VXLAN variant with
> >> existing vswitches (e.g. OVS allows to choose the VXLAN destination
> >> port, ditto for the linux kernel stack).
> >> (ToR is certainly another story, most of them not having a flexible
> >> enough VXLAN dataplane nor support for any MPLS-over-IP.)
> >> WH> and how many ports simultaneously would they support? For this to
> >> work every tenant needs a different VXLAN UDP destination port/receive
> >> port.
> >> There might be SW elements that could do some of this, but IETF
> >> defines solutions which should be implemented across the board
> >> HW/SW/etc. Even if some SW switches can do this, the proposal will
> >> impose so many issues in HW/data-plane engines that I cannot be behind
> >> this solution.
> >> To make this work generically we will have to make changes anyhow.
> >> Given this, we better do it in the right way and guide the industry to
> >> a solution which does not imply those complexities. Otherwise we will
> >> stick with these specials forever with all consequences (bugs, etc).
> >> - snip -
> >> From: "thomas.morin@orange.com
> >> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
> >> <mailto:thomas.morin@orange.com>>" <thomas.morin@orange.com
> >> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
> >> <mailto:thomas.morin@orange.com>>>
> >> Organization: Orange
> >> Date: Tuesday 17 November 2015 at 01:37
> >> To: Wim Henderickx <wim.henderickx@alcatel-lucent.com
> >> <mailto:wim.henderickx@alcatel-lucent.com><mailto:
> wim.henderickx@alcatel-lucent.com
> >> <mailto:wim.henderickx@alcatel-lucent.com>>>, BESS <bess@ietf.org
> >> <mailto:bess@ietf.org><mailto:bess@ietf.org <mailto:bess@ietf.org>>>
> >> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
> >> Hi Wim, WG,
> >> 2015-11-16, Henderickx, Wim (Wim):
> >> 2015-11-13, Henderickx, Wim (Wim):
> >> Thomas, we can discuss forever and someone need to describe
> >> requirements, but the current proposal I cannot agree to for the
> >> reasons explained.
> >> TM> Well, although discussing forever is certainly not the goal, the
> >> reasons for rejecting a proposal need to be thoroughly understood.
> >> WH> my point is what is the real driver for supporting a plain VXLAN
> >> data-plane here, the use cases I have seen in this txt is always where
> >> an application behind a NVE/TOR is demanding option c, but none of the
> >> NVE/TOR elements.
> >> My understanding is that the applications  are contexts where overlays
> >> are present is when workloads (VMs or baremetal) need to be
> >> interconnected with VPNs. In these contexts, there can be reasons to
> >> want Option C to reduce the state on ASBRs.
> >> In these context, its not the workload (VM or baremetal) that would
> >> typically handle VRFs, but really the vswitch or ToR.
> >> WH2> can it not be all cases: TOR/vswitch/Application. I would make
> >> the solution flexible to support all of these not?
> >> 2015-11-13, Henderickx, Wim (Wim):
> >> TM> The right trade-off to make may in fact depend on whether you
> prefer:
> >> (a) a new dataplane stitching behavior on DC ASBRs (the behavior
> >> specified in this draft)
> >> or (b) an evolution of the encaps on the vswitches and ToRs to support
> >> MPLS/MPLS/(UDP or GRE)
> >> WH> b depends on the use case
> >> I don't get what you mean by "b depends on the use case".
> >> WH> see my above comment. If the real use case is an application
> >> behind NVE/TOR requiring model C, than all the discussion on impact on
> >> NVE/TOR is void. As such I want to have a discussion on the real
> >> driver/requirement for option c interworking with an IP based Fabric.
> >> Although I can agree than detailing requirements can always help, I
> >> don't think one can assume a certain application to dismiss the
> proposal.
> >> WH> for me the proposal is not acceptable for the reasons explained:
> >> too much impact on the data-planes
> >> I wrote the above based on the idea that the encap used in
> >> MPLS/MPLS/(UDP or GRE), which hence has to be supported on the ToRs
> >> and vswitches.
> >> Another possibility would be service-label/middle-label/Ethernet
> >> assuming an L2 adjacency between vswitches/ToRs and ASBRs, but this
> >> certainly does not match your typical DC architecture. Or perhaps had
> >> you something else in mind ?
> >> WH> see above. The draft right now also requires changes in existing
> >> TOR/NVE so for me all this discussion/debate is void.
> >> No, the spec as it is can be implemented in its VXLAN variant with
> >> existing vswitches (e.g. OVS allows to choose the VXLAN destination
> >> port, ditto for the linux kernel stack).
> >> (ToR is certainly another story, most of them not having a flexible
> >> enough VXLAN dataplane nor support for any MPLS-over-IP.)
> >> WH> and how many ports simultaneously would they support?
> >> WH> and depending on implementation you don=E2=80=99t need to change a=
ny of
> >> the TOR/vswitches.
> >> Does this mean that for some implementations you may not need to
> >> change any of the TOR/vswitches, but that for some others you may ?
> >> WH> any proposal on the table requires changes, so for me this is not
> >> a valid discussion
> >> See above, the proposal in the draft does not necessarily need changes
> >> in vswitches.
> >> Let me take a practical example : while I can quite easily see how to
> >> implement the procedures in draft-hao-bess-inter-nvo3-vpn-optionc
> >> based on current vswitch implementations of VXLAN, the lack of
> >> MPLS/MPLS/(UDP, GRE) support in commonplace vswitches seems to me as
> >> making that alternate solution you suggest harder to implement.
> >> WH> I would disagree to this. Tell me which switch/TOR handles
> >> multiple UDP ports for VXLAN ?
> >> I mentioned _v_switches, and many do support a variable destination
> >> port for VXLAN, which is sufficient to implement what the draft
> proposes.
> >> -Thomas
> >> From: Thomas Morin <thomas.morin@orange.com
> >> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
> >> <mailto:thomas.morin@orange.com>>>
> >> Organization: Orange
> >> Date: Friday 13 November 2015 at 09:57
> >> To: Wim Henderickx <wim.henderickx@alcatel-lucent.com
> >> <mailto:wim.henderickx@alcatel-lucent.com><mailto:
> wim.henderickx@alcatel-lucent.com
> >> <mailto:wim.henderickx@alcatel-lucent.com>>>
> >> Cc: "bess@ietf.org <mailto:bess@ietf.org><mailto:bess@ietf.org
> >> <mailto:bess@ietf.org>>" <bess@ietf.org
> >> <mailto:bess@ietf.org><mailto:bess@ietf.org <mailto:bess@ietf.org>>>
> >> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
> >> Hi Wim,
> >> I agree on the analysis that this proposal is restricted to
> >> implementations that supports the chosen encap with non-IANA ports
> >> (which may be hard to achieve for instance on hardware
> >> implementations, as you suggest), or to context where managing
> >> multiple IPs would be operationally viable.
> >> However, it does not seem obvious to me how the alternative you
> >> propose [relying on 3-label option C with an MPLS/MPLS/(UDP|GRE)
> >> encap] addresses the issue of whether the encap behavior is supported
> >> or not (e.g. your typical ToR chipset possibly may not support this
> >> kind of encap,  and even software-based switches may not be ready to
> >> support that today).
> >> My take is that having different options to adapt to various
> >> implementations constraints we may have would have value.
> >> (+ one question below on VXLAN...)
> >> -Thomas
> >> 2015-11-12, Henderickx, Wim (Wim):
> >> On VXLAN/NVGRE, do you challenge the fact that they would be used with
> >> a dummy MAC address that would be replaced by the right MAC by a
> >> sender based on an ARP request when needed ?
> >> Is the above the issue you had in mind about VXLAN and NVGRE ?
> >> WH> yes
> >> I you don't mind me asking : why do you challenge that ?
> >>
> >
> >_______________________________________________
> >BESS mailing list
> >BESS@ietf.org
> >https://www.ietf.org/mailman/listinfo/bess
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>

--001a1141bb986aeacc0524e88a4c
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Weiguo,<div><br></div><div>If we&#39;re really talking =
about a public cloud operator where MOST of the endpoints would be software=
, interconnecting DC and WAN environments seems pretty blunt to be honest. =
You&#39;re going to be leaking every single /32 IP address of the virtual m=
achines into the wide area and most carriers tend to avoid that kind of thi=
ng since its quite disrutptive in terms of scalability.</div><div><br></div=
><div>Furthermore, wim&#39;s proposal does NOT imply changes on the east-we=
st traffic patterns. Those would remain on vxlan or whatever new encapsulat=
ion we manage to come up with at NVO3.</div><div><br></div><div>Model C int=
erconnect presuposes a high trust relationship between both parties, and if=
 the cloud and WAN are operated by the same company, that is valid.</div><d=
iv><br></div><div>Finally, as wim also mentions, the issue of the globally =
allocated VNIDs is quite an issue. This affects the existing TORs since now=
 all the WAN PEs would have to organize themselves not to ever allocate ove=
rlapping labels (then converted to VNIDs) since the DC gear today cannot ha=
ndle using the same VNID on different &quot;services&quot;.=C2=A0</div><div=
><br></div><div>Again, you dismiss the top of racks, but I don&#39;t think =
we can propose a standard that just simply ignores a good chunk of the DC s=
pace.</div><div><br></div><div>And at the same time, all the DC edge router=
s where we propose to implement these complex mapping have larger and large=
r scaling tables with route capacities in the order of millions of prefixes=
 these days. And while model A has the burden of provisioning the DC edge w=
ith the VRF instance, the fact it can do prefix lookups means it doesnt nee=
d to leak every single /32 to the wide area and instead expose the aggregat=
es.</div><div><br></div><div>Best Regards,</div><div><br></div><div><br></d=
iv><div><br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_=
quote">On Thu, Nov 19, 2015 at 7:02 AM, Henderickx, Wim (Wim) <span dir=3D"=
ltr">&lt;<a href=3D"mailto:wim.henderickx@alcatel-lucent.com" target=3D"_bl=
ank">wim.henderickx@alcatel-lucent.com</a>&gt;</span> wrote:<br><blockquote=
 class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli=
d;padding-left:1ex">Thomas, thx for the time summarising this and great sum=
mary.<br>
<span class=3D""><br>
<br>
<br>
<br>
On 19/11/15 02:52, &quot;BESS on behalf of Thomas Morin&quot; &lt;<a href=
=3D"mailto:bess-bounces@ietf.org">bess-bounces@ietf.org</a> on behalf of <a=
 href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</a>&gt; wr=
ote:<br>
<br>
&gt;I don&#39;t believe the discussion can be usefully summarized in terms =
of<br>
&gt;&quot;fatal flaws&quot;.<br>
&gt;Let me try to summarize my understanding of the thing discussed in this=
<br>
&gt;thread.<br>
&gt;<br>
&gt;The solution in the draft has an impact on ASBR hardware due to the new=
<br>
&gt;kind of stitching required (as well summarized by Diego). Whether this<=
br>
&gt;is a big issue or not depends on the vendor. The solution in the draft,=
<br>
&gt;for the NVE part, would be implementable in software quite easily. But,=
<br>
&gt;because of the limitations in the widespread ToR chipsets for VXLAN (an=
d<br>
&gt;their lack of support for MPLS/(GRE or UDP)), its multiple-UDP-port<br>
&gt;variant would be harder to implement in ToRs or at least not without a<=
br>
&gt;performance hit (people who know that better, feel free to correct).<br=
>
<br>
</span>WH&gt; some HW cannot do this at all, so lets dismiss this idea.<br>
<span class=3D""><br>
&gt;The multiple-loopback approach has operational drawbacks, but whether o=
r<br>
&gt;not these are killer issues may depend on the targeted scale (in terms<=
br>
&gt;of number of NVEs) and may depend on other factors (operator practices,=
<br>
&gt;ability to automate ASBR configs).<br>
<br>
</span>WH&gt; ok now we have not discussed the constraints some HW vendors =
have with respect to global VNIDs. To make this work all VNID/Labels need t=
o be globally unique. Hmmmmm<br>
<span class=3D""><br>
&gt;<br>
&gt;The alternative approach, put forward by Wim, consist in using existing=
<br>
&gt;Option-C with a variant of the 3-label variant relying on an<br>
&gt;MPLS/MPLS/UDP-or-GRE encap (instead of the 3-label MPLS stack).=C2=A0 T=
his<br>
&gt;approach would not necessitate new standardized procedures, would<br>
&gt;require less changes on ASBRs. However it is not supported today by<br>
&gt;vswitches or ToRs (unless the bottom MPLS label is passed to the VM,<br=
>
&gt;which I think would restrict the application to a subset of the<br>
&gt;scenarios for which Option C is interesting). Having it supported in<br=
>
&gt;vswitches may be a simple matter of writing the software, but ToR<br>
&gt;support seems to require evolution in chipsets ; whether such a support=
<br>
&gt;is likely to appear hasn&#39;t been discussed in the thread.<br>
&gt;<br>
&gt;All in all, it seems there is no solution to cover an Option C scenario=
<br>
&gt;with today&#39;s generation ToRs, and the question for tomorrow&#39;s g=
eneration<br>
&gt;ToRs hasn&#39;t been really discussed.<br>
&gt;<br>
&gt;Based on the above, I would think the question boils down to whether it=
<br>
&gt;is desirable to specify an Option C variant usable with vswitches as<br=
>
&gt;they are today and possibly usable with a performance hit with today&#3=
9;s<br>
&gt;ToRs chipsets, at the expense of a required evolution on ASBRs.=C2=A0 T=
he<br>
&gt;alternative requiring some evolution on vswitches and waiting for futur=
e<br>
&gt;ToRs chipsets.<br>
<br>
</span>WH&gt; I vote for a an evolution of switches/TORs that have proper s=
upport for this.<br>
I hope some HW vendors of TOR chips shime in, but I am told the MPLS soluti=
on is possible in the next generation chips they are working on.<br>
<br>
The other options requires baggage forever on the ASBR elements that does n=
ot bring value and it is better to avoid this and build an architecture whi=
ch is future proof and more cost effective. My 2 cents<br>
<div class=3D"HOEnZb"><div class=3D"h5">&gt;<br>
&gt;-Thomas<br>
&gt;<br>
&gt;<br>
&gt;Zhuangshunwan=C2=A0 :<br>
&gt;&gt;<br>
&gt;&gt; Hi Diego,<br>
&gt;&gt;<br>
&gt;&gt; Thanks for your comments. Pls see inline with [Vincent].<br>
&gt;&gt;<br>
&gt;&gt; Vincent<br>
&gt;&gt;<br>
&gt;&gt; *=E5=8F=91=E4=BB=B6=E4=BA=BA:*BESS [mailto:<a href=3D"mailto:bess-=
bounces@ietf.org">bess-bounces@ietf.org</a>] *=E4=BB=A3=E8=A1=A8 *Diego Gar=
cia del Rio<br>
&gt;&gt; *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4:*2015=E5=B9=B411=E6=9C=8818=
=E6=97=A514:25<br>
&gt;&gt; *=E6=94=B6=E4=BB=B6=E4=BA=BA:*<a href=3D"mailto:bess@ietf.org">bes=
s@ietf.org</a><br>
&gt;&gt; *=E4=B8=BB=E9=A2=98:*Re: [bess] draft-hao-bess-inter-nvo3-vpn-opti=
onc<br>
&gt;&gt;<br>
&gt;&gt; Some comments from my side,<br>
&gt;&gt; I think the draft makes quite a few assumptions on specific<br>
&gt;&gt; implementation details that are way too general to be considered<b=
r>
&gt;&gt; widely available.<br>
&gt;&gt; Most of the TOR devices today already pay a double-pass penalty wh=
en<br>
&gt;&gt; doing routing of traffic in/out of vxlan-type tunnels. Only the ne=
west<br>
&gt;&gt; generation can route into tunnels without additional passes. And a=
re<br>
&gt;&gt; definitively limited in being able to arbitrary select UDP ports o=
n a<br>
&gt;&gt; per tunnel basis. In fact, most are even limited at using more tha=
n<br>
&gt;&gt; one VNID per &quot;service&quot; of sorts.<br>
&gt;&gt; [Vincent]: Yes, the new generation BCM chipset has already support=
ed<br>
&gt;&gt; VXLAN routing without additional passes. For OVS/TOR, VXLAN<br>
&gt;&gt; encapsulation is more popular than MPLSoGRE/UDP, and has better<br=
>
&gt;&gt; performance.<br>
&gt;&gt; The IP-addressed based implementation which would, I assume, imply=
<br>
&gt;&gt; assigning one or more CIDRs to a loopback interface on the ASBR-d =
is<br>
&gt;&gt; also quite arbitrary and does not seem like a technically &quot;cl=
ean&quot;<br>
&gt;&gt; solution. (besides burning tons of IPs). As a side-note, most PE-g=
rade<br>
&gt;&gt; routers i&#39;ve worked with were quite limited in terms of IP add=
resses<br>
&gt;&gt; used for tunnel termination and it wasn&#39;t that just a simple p=
ool can<br>
&gt;&gt; be used.<br>
&gt;&gt; [Vincent]: I think the larger VTEP IP address range on ASBR-d has =
no<br>
&gt;&gt; limitations. For the hardware on ASBR-d, it has capability to<br>
&gt;&gt; terminate multiple VXLAN tunnels with arbitrary destination VTEP I=
P<br>
&gt;&gt; addresses.<br>
&gt;&gt; Wim&#39;s mentions on cases where the Application itself, hosted i=
n a<br>
&gt;&gt; datacenter, would be part of the option-C interconnect, was dismis=
sed<br>
&gt;&gt; without much discussion so far, while, if we look in detail at the=
<br>
&gt;&gt; type of users which will even consider a complex topology like mod=
el-C<br>
&gt;&gt; its most likely users and operators very familiar with MPLS VPNs i=
n<br>
&gt;&gt; the WAN. Those type of operators will most likely be very interest=
ed<br>
&gt;&gt; in deploying MPLS or WAN-grade applications (i.e., virtual-routers=
 or<br>
&gt;&gt; other VNFs) in the DC and thus its highly likely that the intercon=
nect<br>
&gt;&gt; would not terminate at the NVE itself but rather the TS (the virtu=
al<br>
&gt;&gt; machine).<br>
&gt;&gt; Also, the use of UDP ports at random would imply quite complex log=
ic<br>
&gt;&gt; on the ASBR-d IMHO. Im not saying its impossible, but since the<br=
>
&gt;&gt; received packet now not only has to be received on a random (thoug=
h<br>
&gt;&gt; locally chosen) UDP port and this information preserved in the<br>
&gt;&gt; pipeline to be able to do the double-tunnel-stitching, it sounds q=
uite<br>
&gt;&gt; complex. I am sure someone in the list will mention this has alrea=
dy<br>
&gt;&gt; been implemented somewhere, and I won&#39;t argue with that. And l=
et&#39;s not<br>
&gt;&gt; even bring into account what this would do to any DC middlebox tha=
t<br>
&gt;&gt; now has to look at vxlan over almost any random port. We have to g=
o<br>
&gt;&gt; back to the &quot;is it a 4 or is it a 6 in byte x&quot; heuristic=
s to try to<br>
&gt;&gt; guess whether the packet is vxlan or just something entirely diffe=
rent<br>
&gt;&gt; running over IP.<br>
&gt;&gt; [Vincent]: Using NP or multi-core CPU hardware technology, it can =
be<br>
&gt;&gt; implemented although deeper packet inspection is needed to perform=
 UDP<br>
&gt;&gt; port and MPLS stitching.<br>
&gt;&gt; In general I feel the proposed solution seems to be fitting of a<b=
r>
&gt;&gt; specific use-case which is not really detailed in the draft and do=
es<br>
&gt;&gt; not describe=C2=A0 =C2=A0a solution that would &quot;elegantly&quo=
t; solve the issues at<br>
&gt;&gt; hand. It just feels like we&#39;re using any available bit-space t=
o stuff<br>
&gt;&gt; data into places that do not necesarily belong.<br>
&gt;&gt; Yes, MPLS encapsulations on virtual switches are not yet fully<br>
&gt;&gt; available, and there can be some performance penalty on the TORs, =
but<br>
&gt;&gt; the solutions are much cleaner from a control and data plane point=
 of<br>
&gt;&gt; view. Maybe I&#39;m too utopic.<br>
&gt;&gt; [Vincent]: I think pure VXLAN solution has its scenario, it&#39;s =
general<br>
&gt;&gt; rather than specific. We can&#39;t require all OVS/NVEs support VX=
LAN +<br>
&gt;&gt; MPLSoGRE at the same time.<br>
&gt;&gt; Best regards,<br>
&gt;&gt; Diego<br>
&gt;&gt; ------------------------------------------------------------------=
---------------<br>
&gt;&gt; Hi,<br>
&gt;&gt; The problem we are trying to solve is to reduce data center<br>
&gt;&gt; GW/ASBR-d&#39;s forwarding table size, the motivation is same as<b=
r>
&gt;&gt; traditional MPLS VPN option-C. Currently, the most common practise=
 on<br>
&gt;&gt; ASBR-d is to terminate VXLAN encapsulation, look up local routing<=
br>
&gt;&gt; table, and then perform MPLS encapsulation to the WAN network. ASB=
R-d<br>
&gt;&gt; needs to maintain all VM&#39;s MAC/IP. In Option-C method, only tr=
ansport<br>
&gt;&gt; layer information needed to be maintained at GW/ASBR-d, the<br>
&gt;&gt; scalability will be greatly enhanced. Traditonal Option-C is only =
for<br>
&gt;&gt; MPLS VPN network interworking, because VXLAN is becoming pervasive=
 in<br>
&gt;&gt; data center,=C2=A0 the solution in this draft was proposed for the=
<br>
&gt;&gt; heterogeneous network interworking.<br>
&gt;&gt; The advantage of this solution is that only VXLAN encapsulation is=
<br>
&gt;&gt; required for OVS/TOR. Unlike Wim&#39;s solution, east-west bound t=
raffic<br>
&gt;&gt; uses VXLAN encap, while north-south bound traffic uses MPLSoGRE/UD=
P encap.<br>
&gt;&gt; There are two solutions in this draft:<br>
&gt;&gt; 1. Using VXLAN tunnel destination IP for stitching at ASBR-d.<br>
&gt;&gt; No data plane modification requirements on OVS or TOR switches, on=
ly<br>
&gt;&gt; hardware changes on ASBR-d. ASBR-d normally is router, it has<br>
&gt;&gt; capability to realize the hardware changes. It will consume many I=
P<br>
&gt;&gt; addresses and the IP pool for allocation needs to be configured on=
<br>
&gt;&gt; ASBR-d beforehand.<br>
&gt;&gt; 2. Using VXLAN destination UDP port for stitching at ASBR-d.<br>
&gt;&gt; Compared with solution 1, less IP address will be consumed for<br>
&gt;&gt; allocation. If UDP port range is too large, we can combine with<br=
>
&gt;&gt; solution 1 and 2.<br>
&gt;&gt; In this solution, both data plane modification changes are needed =
at<br>
&gt;&gt; OVS/TOR and ASBR-d. ASBR-d also has capability to realize the hard=
ware<br>
&gt;&gt; changes. For OVS, it also can realize the data plane changes. For =
TOR<br>
&gt;&gt; switch, it normally can&#39;t realize this function.=C2=A0 This so=
lution mainly<br>
&gt;&gt; focuses on pure software based overlay network, it has more<br>
&gt;&gt; scalability. In public cloud data center, software based overlay<b=
r>
&gt;&gt; network is the majority case.<br>
&gt;&gt; Whether using solution 1 or 2 depends on the operators real envion=
ment.<br>
&gt;&gt; So I think our solution has no flaws, it works fine.<br>
&gt;&gt; Thanks,<br>
&gt;&gt; weiguo<br>
&gt;&gt; ________________________________<br>
&gt;&gt; From: BESS [<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@=
ietf.org</a> &lt;mailto:<a href=3D"mailto:bess-bounces@ietf.org">bess-bounc=
es@ietf.org</a>&gt;] on<br>
&gt;&gt; behalf of John E Drake [<a href=3D"mailto:jdrake@juniper.net">jdra=
ke@juniper.net</a> &lt;mailto:<a href=3D"mailto:jdrake@juniper.net">jdrake@=
juniper.net</a>&gt;]<br>
&gt;&gt; Sent: Wednesday, November 18, 2015 2:49<br>
&gt;&gt; To: Henderickx, Wim (Wim); EXT - <a href=3D"mailto:thomas.morin@or=
ange.com">thomas.morin@orange.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com">thomas.morin=
@orange.com</a>&gt;; BESS<br>
&gt;&gt; Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br>
&gt;&gt; Hi,<br>
&gt;&gt; I think Wim has conclusively demonstrated that this draft has fata=
l<br>
&gt;&gt; flaws and I don=E2=80=99t support it.=C2=A0 I also agree with his =
suggestion that<br>
&gt;&gt; we first figure out what problem we are trying to solve before sol=
ving it.<br>
&gt;&gt; Yours Irrespectively,<br>
&gt;&gt; John<br>
&gt;&gt; From: BESS [mailto:<a href=3D"mailto:bess-bounces@ietf.org">bess-b=
ounces@ietf.org</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:bess-bounces@ietf.org">bess-bounces@i=
etf.org</a>&gt;] On Behalf Of Henderickx, Wim (Wim)<br>
&gt;&gt; Sent: Tuesday, November 17, 2015 12:49 PM<br>
&gt;&gt; To: EXT - <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@=
orange.com</a> &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com">thomas=
.morin@orange.com</a>&gt;; BESS<br>
&gt;&gt; Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br>
&gt;&gt; =E2=80=94 Snip =E2=80=94<br>
&gt;&gt; No, the spec as it is can be implemented in its VXLAN variant with=
<br>
&gt;&gt; existing vswitches (e.g. OVS allows to choose the VXLAN destinatio=
n<br>
&gt;&gt; port, ditto for the linux kernel stack).<br>
&gt;&gt; (ToR is certainly another story, most of them not having a flexibl=
e<br>
&gt;&gt; enough VXLAN dataplane nor support for any MPLS-over-IP.)<br>
&gt;&gt; WH&gt; and how many ports simultaneously would they support? For t=
his to<br>
&gt;&gt; work every tenant needs a different VXLAN UDP destination port/rec=
eive<br>
&gt;&gt; port.<br>
&gt;&gt; There might be SW elements that could do some of this, but IETF<br=
>
&gt;&gt; defines solutions which should be implemented across the board<br>
&gt;&gt; HW/SW/etc. Even if some SW switches can do this, the proposal will=
<br>
&gt;&gt; impose so many issues in HW/data-plane engines that I cannot be be=
hind<br>
&gt;&gt; this solution.<br>
&gt;&gt; To make this work generically we will have to make changes anyhow.=
<br>
&gt;&gt; Given this, we better do it in the right way and guide the industr=
y to<br>
&gt;&gt; a solution which does not imply those complexities. Otherwise we w=
ill<br>
&gt;&gt; stick with these specials forever with all consequences (bugs, etc=
).<br>
&gt;&gt; - snip -<br>
&gt;&gt; From: &quot;<a href=3D"mailto:thomas.morin@orange.com">thomas.mori=
n@orange.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com">thomas.morin=
@orange.com</a>&gt;&lt;mailto:<a href=3D"mailto:thomas.morin@orange.com">th=
omas.morin@orange.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com">thomas.morin=
@orange.com</a>&gt;&gt;&quot; &lt;<a href=3D"mailto:thomas.morin@orange.com=
">thomas.morin@orange.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com">thomas.morin=
@orange.com</a>&gt;&lt;mailto:<a href=3D"mailto:thomas.morin@orange.com">th=
omas.morin@orange.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com">thomas.morin=
@orange.com</a>&gt;&gt;&gt;<br>
&gt;&gt; Organization: Orange<br>
&gt;&gt; Date: Tuesday 17 November 2015 at 01:37<br>
&gt;&gt; To: Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-lu=
cent.com">wim.henderickx@alcatel-lucent.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:wim.henderickx@alcatel-lucent.com">wi=
m.henderickx@alcatel-lucent.com</a>&gt;&lt;mailto:<a href=3D"mailto:wim.hen=
derickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:wim.henderickx@alcatel-lucent.com">wi=
m.henderickx@alcatel-lucent.com</a>&gt;&gt;&gt;, BESS &lt;<a href=3D"mailto=
:bess@ietf.org">bess@ietf.org</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;&=
lt;mailto:<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a> &lt;mailto:<a =
href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;&gt;&gt;<br>
&gt;&gt; Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br>
&gt;&gt; Hi Wim, WG,<br>
&gt;&gt; 2015-11-16, Henderickx, Wim (Wim):<br>
&gt;&gt; 2015-11-13, Henderickx, Wim (Wim):<br>
&gt;&gt; Thomas, we can discuss forever and someone need to describe<br>
&gt;&gt; requirements, but the current proposal I cannot agree to for the<b=
r>
&gt;&gt; reasons explained.<br>
&gt;&gt; TM&gt; Well, although discussing forever is certainly not the goal=
, the<br>
&gt;&gt; reasons for rejecting a proposal need to be thoroughly understood.=
<br>
&gt;&gt; WH&gt; my point is what is the real driver for supporting a plain =
VXLAN<br>
&gt;&gt; data-plane here, the use cases I have seen in this txt is always w=
here<br>
&gt;&gt; an application behind a NVE/TOR is demanding option c, but none of=
 the<br>
&gt;&gt; NVE/TOR elements.<br>
&gt;&gt; My understanding is that the applications=C2=A0 are contexts where=
 overlays<br>
&gt;&gt; are present is when workloads (VMs or baremetal) need to be<br>
&gt;&gt; interconnected with VPNs. In these contexts, there can be reasons =
to<br>
&gt;&gt; want Option C to reduce the state on ASBRs.<br>
&gt;&gt; In these context, its not the workload (VM or baremetal) that woul=
d<br>
&gt;&gt; typically handle VRFs, but really the vswitch or ToR.<br>
&gt;&gt; WH2&gt; can it not be all cases: TOR/vswitch/Application. I would =
make<br>
&gt;&gt; the solution flexible to support all of these not?<br>
&gt;&gt; 2015-11-13, Henderickx, Wim (Wim):<br>
&gt;&gt; TM&gt; The right trade-off to make may in fact depend on whether y=
ou prefer:<br>
&gt;&gt; (a) a new dataplane stitching behavior on DC ASBRs (the behavior<b=
r>
&gt;&gt; specified in this draft)<br>
&gt;&gt; or (b) an evolution of the encaps on the vswitches and ToRs to sup=
port<br>
&gt;&gt; MPLS/MPLS/(UDP or GRE)<br>
&gt;&gt; WH&gt; b depends on the use case<br>
&gt;&gt; I don&#39;t get what you mean by &quot;b depends on the use case&q=
uot;.<br>
&gt;&gt; WH&gt; see my above comment. If the real use case is an applicatio=
n<br>
&gt;&gt; behind NVE/TOR requiring model C, than all the discussion on impac=
t on<br>
&gt;&gt; NVE/TOR is void. As such I want to have a discussion on the real<b=
r>
&gt;&gt; driver/requirement for option c interworking with an IP based Fabr=
ic.<br>
&gt;&gt; Although I can agree than detailing requirements can always help, =
I<br>
&gt;&gt; don&#39;t think one can assume a certain application to dismiss th=
e proposal.<br>
&gt;&gt; WH&gt; for me the proposal is not acceptable for the reasons expla=
ined:<br>
&gt;&gt; too much impact on the data-planes<br>
&gt;&gt; I wrote the above based on the idea that the encap used in<br>
&gt;&gt; MPLS/MPLS/(UDP or GRE), which hence has to be supported on the ToR=
s<br>
&gt;&gt; and vswitches.<br>
&gt;&gt; Another possibility would be service-label/middle-label/Ethernet<b=
r>
&gt;&gt; assuming an L2 adjacency between vswitches/ToRs and ASBRs, but thi=
s<br>
&gt;&gt; certainly does not match your typical DC architecture. Or perhaps =
had<br>
&gt;&gt; you something else in mind ?<br>
&gt;&gt; WH&gt; see above. The draft right now also requires changes in exi=
sting<br>
&gt;&gt; TOR/NVE so for me all this discussion/debate is void.<br>
&gt;&gt; No, the spec as it is can be implemented in its VXLAN variant with=
<br>
&gt;&gt; existing vswitches (e.g. OVS allows to choose the VXLAN destinatio=
n<br>
&gt;&gt; port, ditto for the linux kernel stack).<br>
&gt;&gt; (ToR is certainly another story, most of them not having a flexibl=
e<br>
&gt;&gt; enough VXLAN dataplane nor support for any MPLS-over-IP.)<br>
&gt;&gt; WH&gt; and how many ports simultaneously would they support?<br>
&gt;&gt; WH&gt; and depending on implementation you don=E2=80=99t need to c=
hange any of<br>
&gt;&gt; the TOR/vswitches.<br>
&gt;&gt; Does this mean that for some implementations you may not need to<b=
r>
&gt;&gt; change any of the TOR/vswitches, but that for some others you may =
?<br>
&gt;&gt; WH&gt; any proposal on the table requires changes, so for me this =
is not<br>
&gt;&gt; a valid discussion<br>
&gt;&gt; See above, the proposal in the draft does not necessarily need cha=
nges<br>
&gt;&gt; in vswitches.<br>
&gt;&gt; Let me take a practical example : while I can quite easily see how=
 to<br>
&gt;&gt; implement the procedures in draft-hao-bess-inter-nvo3-vpn-optionc<=
br>
&gt;&gt; based on current vswitch implementations of VXLAN, the lack of<br>
&gt;&gt; MPLS/MPLS/(UDP, GRE) support in commonplace vswitches seems to me =
as<br>
&gt;&gt; making that alternate solution you suggest harder to implement.<br=
>
&gt;&gt; WH&gt; I would disagree to this. Tell me which switch/TOR handles<=
br>
&gt;&gt; multiple UDP ports for VXLAN ?<br>
&gt;&gt; I mentioned _v_switches, and many do support a variable destinatio=
n<br>
&gt;&gt; port for VXLAN, which is sufficient to implement what the draft pr=
oposes.<br>
&gt;&gt; -Thomas<br>
&gt;&gt; From: Thomas Morin &lt;<a href=3D"mailto:thomas.morin@orange.com">=
thomas.morin@orange.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com">thomas.morin=
@orange.com</a>&gt;&lt;mailto:<a href=3D"mailto:thomas.morin@orange.com">th=
omas.morin@orange.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com">thomas.morin=
@orange.com</a>&gt;&gt;&gt;<br>
&gt;&gt; Organization: Orange<br>
&gt;&gt; Date: Friday 13 November 2015 at 09:57<br>
&gt;&gt; To: Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-lu=
cent.com">wim.henderickx@alcatel-lucent.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:wim.henderickx@alcatel-lucent.com">wi=
m.henderickx@alcatel-lucent.com</a>&gt;&lt;mailto:<a href=3D"mailto:wim.hen=
derickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:wim.henderickx@alcatel-lucent.com">wi=
m.henderickx@alcatel-lucent.com</a>&gt;&gt;&gt;<br>
&gt;&gt; Cc: &quot;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a> &lt;m=
ailto:<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;&lt;mailto:<a h=
ref=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;&=
gt;&quot; &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;&=
lt;mailto:<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a> &lt;mailto:<a =
href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;&gt;&gt;<br>
&gt;&gt; Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br>
&gt;&gt; Hi Wim,<br>
&gt;&gt; I agree on the analysis that this proposal is restricted to<br>
&gt;&gt; implementations that supports the chosen encap with non-IANA ports=
<br>
&gt;&gt; (which may be hard to achieve for instance on hardware<br>
&gt;&gt; implementations, as you suggest), or to context where managing<br>
&gt;&gt; multiple IPs would be operationally viable.<br>
&gt;&gt; However, it does not seem obvious to me how the alternative you<br=
>
&gt;&gt; propose [relying on 3-label option C with an MPLS/MPLS/(UDP|GRE)<b=
r>
&gt;&gt; encap] addresses the issue of whether the encap behavior is suppor=
ted<br>
&gt;&gt; or not (e.g. your typical ToR chipset possibly may not support thi=
s<br>
&gt;&gt; kind of encap,=C2=A0 and even software-based switches may not be r=
eady to<br>
&gt;&gt; support that today).<br>
&gt;&gt; My take is that having different options to adapt to various<br>
&gt;&gt; implementations constraints we may have would have value.<br>
&gt;&gt; (+ one question below on VXLAN...)<br>
&gt;&gt; -Thomas<br>
&gt;&gt; 2015-11-12, Henderickx, Wim (Wim):<br>
&gt;&gt; On VXLAN/NVGRE, do you challenge the fact that they would be used =
with<br>
&gt;&gt; a dummy MAC address that would be replaced by the right MAC by a<b=
r>
&gt;&gt; sender based on an ARP request when needed ?<br>
&gt;&gt; Is the above the issue you had in mind about VXLAN and NVGRE ?<br>
&gt;&gt; WH&gt; yes<br>
&gt;&gt; I you don&#39;t mind me asking : why do you challenge that ?<br>
&gt;&gt;<br>
&gt;<br>
&gt;_______________________________________________<br>
&gt;BESS mailing list<br>
&gt;<a href=3D"mailto:BESS@ietf.org">BESS@ietf.org</a><br>
&gt;<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferre=
r" target=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
_______________________________________________<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
</div></div></blockquote></div><br></div>

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From: Osama Zia <osamaz@microsoft.com>
To: "UTTARO, JAMES" <ju1738@att.com>, Haoweiguo <haoweiguo@huawei.com>, "John E Drake" <jdrake@juniper.net>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, BESS <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Today many large enterprises connect to cloud providers using their existin=
g MPLS VPN networks. This would mean different AS Numbers at WAN and DC sit=
es.

Regards,
Osama

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of UTTARO, JAMES
Sent: Thursday, November 19, 2015 9:46 AM
To: Haoweiguo <haoweiguo@huawei.com>; John E Drake <jdrake@juniper.net>; He=
nderickx, Wim (Wim) <wim.henderickx@alcatel-lucent.com>; EXT - thomas.morin=
@orange.com <thomas.morin@orange.com>; BESS <bess@ietf.org>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

A concern I have with this draft is that it pre-supposes the network archit=
ecture in terms of how DCs and WAN are connected. It assumes that DCs and W=
AN networks are in different AS domains. Why is that??

Jim Uttaro

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Haoweiguo
Sent: Tuesday, November 17, 2015 11:24 PM
To: John E Drake; Henderickx, Wim (Wim); EXT - thomas.morin@orange.com<mail=
to:thomas.morin@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc


Hi,

The problem we are trying to solve is to reduce data center GW/ASBR-d's for=
warding table size, the motivation is same as traditional MPLS VPN option-C=
. Currently, the most common practise on ASBR-d is to terminate VXLAN encap=
sulation, look up local routing table, and then perform MPLS encapsulation =
to the WAN network. ASBR-d needs to maintain all VM's MAC/IP. In Option-C m=
ethod, only transport layer information needed to be maintained at GW/ASBR-=
d, the scalability will be greatly enhanced. Traditonal Option-C is only fo=
r MPLS VPN network interworking, because VXLAN is becoming pervasive in dat=
a center,  the solution in this draft was proposed for the heterogeneous ne=
twork interworking.

The advantage of this solution is that only VXLAN encapsulation is required=
 for OVS/TOR. Unlike Wim's solution, east-west bound traffic uses VXLAN enc=
ap, while north-south bound traffic uses MPLSoGRE/UDP encap.

There are two solutions in this draft:

1. Using VXLAN tunnel destination IP for stitching at ASBR-d.

No data plane modification requirements on OVS or TOR switches, only hardwa=
re changes on ASBR-d. ASBR-d normally is router, it has capability to reali=
ze the hardware changes. It will consume many IP addresses and the IP pool =
for allocation needs to be configured on ASBR-d beforehand.

2. Using VXLAN destination UDP port for stitching at ASBR-d.

Compared with solution 1, less IP address will be consumed for allocation. =
If UDP port range is too large, we can combine with solution 1 and 2.

In this solution, both data plane modification changes are needed at OVS/TO=
R and ASBR-d. ASBR-d also has capability to realize the hardware changes. F=
or OVS, it also can realize the data plane changes. For TOR switch, it norm=
ally can't realize this function.  This solution mainly focuses on pure sof=
tware based overlay network, it has more scalability. In public cloud data =
center, software based overlay network is the majority case.



Whether using solution 1 or 2 depends on the operators real envionment.



So I think our solution has no flaws, it works fine.

Thanks,

weiguo



________________________________
From: BESS [bess-bounces@ietf.org] on behalf of John E Drake [jdrake@junipe=
r.net]
Sent: Wednesday, November 18, 2015 2:49
To: Henderickx, Wim (Wim); EXT - thomas.morin@orange.com<mailto:thomas.mori=
n@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
Hi,

I think Wim has conclusively demonstrated that this draft has fatal flaws a=
nd I don't support it.  I also agree with his suggestion that we first figu=
re out what problem we are trying to solve before solving it.

Yours Irrespectively,

John

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Tuesday, November 17, 2015 12:49 PM
To: EXT - thomas.morin@orange.com<mailto:thomas.morin@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

- Snip -

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support? For this to work =
every tenant needs a different VXLAN UDP destination port/receive port.
There might be SW elements that could do some of this, but IETF defines sol=
utions which should be implemented across the board HW/SW/etc. Even if some=
 SW switches can do this, the proposal will impose so many issues in HW/dat=
a-plane engines that I cannot be behind this solution.

To make this work generically we will have to make changes anyhow. Given th=
is, we better do it in the right way and guide the industry to a solution w=
hich does not imply those complexities. Otherwise we will stick with these =
specials forever with all consequences (bugs, etc).

- snip -

From: "thomas.morin@orange.com<mailto:thomas.morin@orange.com>" <thomas.mor=
in@orange.com<mailto:thomas.morin@orange.com>>
Organization: Orange
Date: Tuesday 17 November 2015 at 01:37
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, BESS <bess@ietf.org<mailto:bess@ietf.org>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim, WG,

2015-11-16, Henderickx, Wim (Wim):

2015-11-13, Henderickx, Wim (Wim):
Thomas, we can discuss forever and someone need to describe requirements, b=
ut the current proposal I cannot agree to for the reasons explained.

TM> Well, although discussing forever is certainly not the goal, the reason=
s for rejecting a proposal need to be thoroughly understood.
WH> my point is what is the real driver for supporting a plain VXLAN data-p=
lane here, the use cases I have seen in this txt is always where an applica=
tion behind a NVE/TOR is demanding option c, but none of the NVE/TOR elemen=
ts.


My understanding is that the applications  are contexts where overlays are =
present is when workloads (VMs or baremetal) need to be interconnected with=
 VPNs. In these contexts, there can be reasons to want Option C to reduce t=
he state on ASBRs.

In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.

WH2> can it not be all cases: TOR/vswitch/Application. I would make the sol=
ution flexible to support all of these not?


2015-11-13, Henderickx, Wim (Wim):

TM> The right trade-off to make may in fact depend on whether you prefer:
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)

WH> b depends on the use case

I don't get what you mean by "b depends on the use case".
WH> see my above comment. If the real use case is an application behind NVE=
/TOR requiring model C, than all the discussion on impact on NVE/TOR is voi=
d. As such I want to have a discussion on the real driver/requirement for o=
ption c interworking with an IP based Fabric.

Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.

WH> for me the proposal is not acceptable for the reasons explained: too mu=
ch impact on the data-planes

I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?

WH> see above. The draft right now also requires changes in existing TOR/NV=
E so for me all this discussion/debate is void.

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support?

WH> and depending on implementation you don't need to change any of the TOR=
/vswitches.

Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?

WH> any proposal on the table requires changes, so for me this is not a val=
id discussion

See above, the proposal in the draft does not necessarily need changes in v=
switches.

Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems to me as making that alternate solution y=
ou suggest harder to implement.

WH> I would disagree to this. Tell me which switch/TOR handles multiple UDP=
 ports for VXLAN ?

I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.

-Thomas








From: Thomas Morin <thomas.morin@orange.com<mailto:thomas.morin@orange.com>=
>
Organization: Orange
Date: Friday 13 November 2015 at 09:57
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim,

I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs would be operationally viable.

However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support this kind of encap,  and even software=
-based switches may not be ready to support that today).

My take is that having different options to adapt to various implementation=
s constraints we may have would have value.

(+ one question below on VXLAN...)

-Thomas


2015-11-12, Henderickx, Wim (Wim):
On VXLAN/NVGRE, do you challenge the fact that they would be used with a du=
mmy MAC address that would be replaced by the right MAC by a sender based o=
n an ARP request when needed ?

Is the above the issue you had in mind about VXLAN and NVGRE ?

WH> yes

I you don't mind me asking : why do you challenge that ?




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</head>
<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Today many large enterprises connect =
to cloud providers using their existing MPLS VPN networks. This would mean =
different AS Numbers at WAN and DC sites.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Osama<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> BESS [mailto:bess-bounces@ietf=
.org]
<b>On Behalf Of </b>UTTARO, JAMES<br>
<b>Sent:</b> Thursday, November 19, 2015 9:46 AM<br>
<b>To:</b> Haoweiguo &lt;haoweiguo@huawei.com&gt;; John E Drake &lt;jdrake@=
juniper.net&gt;; Henderickx, Wim (Wim) &lt;wim.henderickx@alcatel-lucent.co=
m&gt;; EXT - thomas.morin@orange.com &lt;thomas.morin@orange.com&gt;; BESS =
&lt;bess@ietf.org&gt;<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">A concern I have with this draf=
t is that it pre-supposes the network architecture in terms of how DCs and =
WAN are connected. It assumes that DCs and WAN
 networks are in different AS domains. Why is that?? &nbsp;<o:p></o:p></spa=
n></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">Jim Uttaro<o:p></o:p></span></i=
></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> BESS [<a href=3D"mailto:bess-bou=
nces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Haoweiguo<br>
<b>Sent:</b> Tuesday, November 17, 2015 11:24 PM<br>
<b>To:</b> John E Drake; Henderickx, Wim (Wim); EXT - <a href=3D"mailto:tho=
mas.morin@orange.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">H=
i,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
he problem we are trying to solve is to reduce data center GW/ASBR-d's forw=
arding table size, the motivation is same as traditional MPLS VPN option-C.=
 Currently, the most common practise on ASBR-d
 is to terminate VXLAN encapsulation, look up local routing table, and then=
 perform MPLS encapsulation to the WAN network. ASBR-d needs to maintain al=
l VM's MAC/IP. In Option-C method, only transport layer information needed =
to be maintained at GW/ASBR-d, the
 scalability will be greatly enhanced. Traditonal Option-C is only for MPLS=
 VPN network interworking, because VXLAN is becoming pervasive in data cent=
er,&nbsp; the solution in this draft was proposed for the heterogeneous net=
work interworking.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
he advantage of this solution is that only VXLAN encapsulation is required =
for OVS/TOR. Unlike Wim's solution, east-west bound traffic uses VXLAN enca=
p, while north-south bound traffic uses MPLSoGRE/UDP
 encap.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
here are two solutions in this draft:<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">1=
. Using VXLAN tunnel destination IP for stitching at ASBR-d.<o:p></o:p></sp=
an></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">N=
o data plane modification requirements on OVS or TOR switches, only hardwar=
e changes on ASBR-d. ASBR-d normally is router, it has capability to realiz=
e the hardware changes. It will consume many
 IP addresses and the IP pool for allocation needs to be configured on ASBR=
-d beforehand.
<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">2=
. Using VXLAN destination UDP port for stitching at ASBR-d.<o:p></o:p></spa=
n></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">C=
ompared with solution 1, less IP address will be consumed for allocation. I=
f UDP port range is too large, we can combine with solution 1 and 2.<o:p></=
o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">I=
n this solution, both data plane modification changes are needed at OVS/TOR=
 and ASBR-d. ASBR-d also has capability to realize the hardware changes. Fo=
r OVS, it also can realize the data plane changes.
 For TOR switch,&nbsp;it normally can't realize this function.&nbsp; This s=
olution mainly focuses on pure software based overlay network, it has more =
scalability. In public cloud data center, software based overlay network is=
 the majority case.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">&=
nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">W=
hether using solution 1 or 2 depends on the operators real envionment.<o:p>=
</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">&=
nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">S=
o I think our solution has no flaws, it works fine.
<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
hanks,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">w=
eiguo<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">&=
nbsp;</span><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black"><o:p></o:p></span></p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"color:black">
<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
<div id=3D"divRpF197338">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">From:<=
/span></b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sa=
ns-serif;color:black"> BESS [bess-bounces@ietf.org] on behalf
 of John E Drake [jdrake@juniper.net]<br>
<b>Sent:</b> Wednesday, November 18, 2015 2:49<br>
<b>To:</b> Henderickx, Wim (Wim); EXT - <a href=3D"mailto:thomas.morin@oran=
ge.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Hi,</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I think Wim has conclusively demonstr=
ated that this draft has fatal flaws and I don&#8217;t support it.&nbsp; I =
also agree with his suggestion that we first figure out what
 problem we are trying to solve before solving it.</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> BESS [=
<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
<b>Sent:</b> Tuesday, November 17, 2015 12:49 PM<br>
<b>To:</b> EXT - <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@or=
ange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&#8212; Snip &#8212;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">No, the spec as it is can be implemente=
d in its VXLAN variant with existing vswitches (e.g. OVS allows to choose t=
he VXLAN destination port, ditto for the linux
 kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; and how many ports simultaneousl=
y would they support? For this to work every tenant needs a different VXLAN=
 UDP destination port/receive port.&nbsp;</span><span style=3D"color:black"=
><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">There might be SW elements that could d=
o some of this, but IETF defines solutions which should be implemented acro=
ss the board HW/SW/etc. Even if some SW switches
 can do this, the proposal will impose so many issues in HW/data-plane engi=
nes that I cannot be behind this solution.&nbsp;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">To make this work generically we will h=
ave to make changes anyhow. Given this, we better do it in the right way an=
d guide the industry to a solution which does
 not imply those complexities. Otherwise we will stick with these specials =
forever with all consequences (bugs, etc).</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">- snip -</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:=
black">&quot;<a href=3D"mailto:thomas.morin@orange.com" target=3D"_blank">t=
homas.morin@orange.com</a>&quot; &lt;<a href=3D"mailto:thomas.morin@orange.=
com" target=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Tuesday 17 November 2015 at 01:37<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;, BESS &=
lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;=
<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi Wim, WG,<br>
<br>
2015-11-16, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
2015-11-13, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thomas, we can discuss forever and some=
one need to describe requirements, but the current proposal I cannot agree =
to for the reasons explained.</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
TM&gt; Well, although discussing forever is certainly not the goal, the rea=
sons for rejecting a proposal need to be thoroughly understood.</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; my point is what is the real dri=
ver for supporting a plain VXLAN data-plane here, the use cases I have seen=
 in this txt is always where an application behind
 a NVE/TOR is demanding option c, but none of the NVE/TOR elements.</span><=
span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
My understanding is that the applications&nbsp; are contexts where overlays=
 are present is when workloads (VMs or baremetal) need to be interconnected=
 with VPNs. In these contexts, there can be reasons to want Option C to red=
uce the state on ASBRs.<br>
<br>
In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH2&gt; can it not be all cases: TOR/vs=
witch/Application. I would make the solution flexible to support all of the=
se not?</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">2015-11-13, Henderickx, Wim (Wim):</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
TM&gt; The right trade-off to make may in fact depend on whether you prefer=
:<br>
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)<br>
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; b depends on the use case
</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
I don't get what you mean by &quot;b depends on the use case&quot;. </span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; see my above comment. If the rea=
l use case is an application behind NVE/TOR requiring model C, than all the=
 discussion on impact on NVE/TOR is void. As such
 I want to have a discussion on the real driver/requirement for option c in=
terworking with an IP based Fabric.</span><span style=3D"color:black"><o:p>=
</o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><br>
Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.<br>
<br>
WH&gt; for me the proposal is not acceptable for the reasons explained: too=
 much impact on the data-planes</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.<br>
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; see above. The draft right now a=
lso requires changes in existing TOR/NVE so for me all this discussion/deba=
te is void.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; and how many ports simultaneousl=
y would they support?</span><span style=3D"color:black"><o:p></o:p></span><=
/p>
</div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; and depending on implementation =
you don&#8217;t need to change any of the TOR/vswitches.</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; any proposal on the table requir=
es changes, so for me this is not a valid discussion</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><br>
See above, the proposal in the draft does not necessarily need changes in v=
switches.</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems
 to me as making that alternate solution you suggest harder to implement.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; I would disagree to this. Tell m=
e which switch/TOR handles multiple UDP ports for VXLAN ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><br>
I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.<br>
<br>
-Thomas<br>
<br>
<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><br>
<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:=
black">Thomas Morin &lt;<a href=3D"mailto:thomas.morin@orange.com" target=
=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Friday 13 November 2015 at 09:57<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi Wim,<br>
<br>
I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs
 would be operationally viable.&nbsp;&nbsp; <br>
<br>
However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support
 this kind of encap,&nbsp; and even software-based switches may not be read=
y to support that today).<br>
<br>
My take is that having different options to adapt to various implementation=
s constraints we may have would have value.<br>
<br>
(&#43; one question below on VXLAN...)<br>
<br>
-Thomas<br>
<br>
<br>
2015-11-12, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">On VXLAN=
/NVGRE, do you challenge the fact that they would be used with a dummy MAC =
address that would be replaced by the right MAC
 by a sender based on an ARP request when needed ?</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
Is the above the issue you had in mind about VXLAN and NVGRE ?</span><span =
style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; yes</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><br>
I you don't mind me asking : why do you challenge that ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
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</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<pre><span style=3D"color:black">__________________________________________=
___________________________________________________________________________=
____<o:p></o:p></span></pre>
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n,<o:p></o:p></span></pre>
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From: "UTTARO, JAMES" <ju1738@att.com>
To: Osama Zia <osamaz@microsoft.com>, "UTTARO, JAMES" <ju1738@att.com>, Haoweiguo <haoweiguo@huawei.com>, John E Drake <jdrake@juniper.net>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, BESS <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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The assumption being based on one's view of what a DC is ;) Yes when an SP =
and a Cloud Provider connect an inter-AS model of some form is needed.. It =
is doubtful that it would ever be Option C as the exposes a tremendous amou=
nt of internal information. At the end of the day network architecture/desi=
gn whether internal/external to a provider is not mandated by the IETF or a=
ny standards body. This draft seems to mix encap, interconnect etc.... If t=
he encap "requires" a specific connectivity model than I am not sure how th=
at exactly works.

Jim Uttaro

From: Osama Zia [mailto:osamaz@microsoft.com]
Sent: Thursday, November 19, 2015 1:51 PM
To: UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); EXT - th=
omas.morin@orange.com; BESS
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Today many large enterprises connect to cloud providers using their existin=
g MPLS VPN networks. This would mean different AS Numbers at WAN and DC sit=
es.

Regards,
Osama

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of UTTARO, JAMES
Sent: Thursday, November 19, 2015 9:46 AM
To: Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>; John E D=
rake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Henderickx, Wim (Wim)=
 <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx@alcatel-lucent.co=
m>>; EXT - thomas.morin@orange.com<mailto:thomas.morin@orange.com> <thomas.=
morin@orange.com<mailto:thomas.morin@orange.com>>; BESS <bess@ietf.org<mail=
to:bess@ietf.org>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

A concern I have with this draft is that it pre-supposes the network archit=
ecture in terms of how DCs and WAN are connected. It assumes that DCs and W=
AN networks are in different AS domains. Why is that??

Jim Uttaro

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Haoweiguo
Sent: Tuesday, November 17, 2015 11:24 PM
To: John E Drake; Henderickx, Wim (Wim); EXT - thomas.morin@orange.com<mail=
to:thomas.morin@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc


Hi,

The problem we are trying to solve is to reduce data center GW/ASBR-d's for=
warding table size, the motivation is same as traditional MPLS VPN option-C=
. Currently, the most common practise on ASBR-d is to terminate VXLAN encap=
sulation, look up local routing table, and then perform MPLS encapsulation =
to the WAN network. ASBR-d needs to maintain all VM's MAC/IP. In Option-C m=
ethod, only transport layer information needed to be maintained at GW/ASBR-=
d, the scalability will be greatly enhanced. Traditonal Option-C is only fo=
r MPLS VPN network interworking, because VXLAN is becoming pervasive in dat=
a center,  the solution in this draft was proposed for the heterogeneous ne=
twork interworking.

The advantage of this solution is that only VXLAN encapsulation is required=
 for OVS/TOR. Unlike Wim's solution, east-west bound traffic uses VXLAN enc=
ap, while north-south bound traffic uses MPLSoGRE/UDP encap.

There are two solutions in this draft:

1. Using VXLAN tunnel destination IP for stitching at ASBR-d.

No data plane modification requirements on OVS or TOR switches, only hardwa=
re changes on ASBR-d. ASBR-d normally is router, it has capability to reali=
ze the hardware changes. It will consume many IP addresses and the IP pool =
for allocation needs to be configured on ASBR-d beforehand.

2. Using VXLAN destination UDP port for stitching at ASBR-d.

Compared with solution 1, less IP address will be consumed for allocation. =
If UDP port range is too large, we can combine with solution 1 and 2.

In this solution, both data plane modification changes are needed at OVS/TO=
R and ASBR-d. ASBR-d also has capability to realize the hardware changes. F=
or OVS, it also can realize the data plane changes. For TOR switch, it norm=
ally can't realize this function.  This solution mainly focuses on pure sof=
tware based overlay network, it has more scalability. In public cloud data =
center, software based overlay network is the majority case.



Whether using solution 1 or 2 depends on the operators real envionment.



So I think our solution has no flaws, it works fine.

Thanks,

weiguo



________________________________
From: BESS [bess-bounces@ietf.org] on behalf of John E Drake [jdrake@junipe=
r.net]
Sent: Wednesday, November 18, 2015 2:49
To: Henderickx, Wim (Wim); EXT - thomas.morin@orange.com<mailto:thomas.mori=
n@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
Hi,

I think Wim has conclusively demonstrated that this draft has fatal flaws a=
nd I don't support it.  I also agree with his suggestion that we first figu=
re out what problem we are trying to solve before solving it.

Yours Irrespectively,

John

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Tuesday, November 17, 2015 12:49 PM
To: EXT - thomas.morin@orange.com<mailto:thomas.morin@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

- Snip -

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support? For this to work =
every tenant needs a different VXLAN UDP destination port/receive port.
There might be SW elements that could do some of this, but IETF defines sol=
utions which should be implemented across the board HW/SW/etc. Even if some=
 SW switches can do this, the proposal will impose so many issues in HW/dat=
a-plane engines that I cannot be behind this solution.

To make this work generically we will have to make changes anyhow. Given th=
is, we better do it in the right way and guide the industry to a solution w=
hich does not imply those complexities. Otherwise we will stick with these =
specials forever with all consequences (bugs, etc).

- snip -

From: "thomas.morin@orange.com<mailto:thomas.morin@orange.com>" <thomas.mor=
in@orange.com<mailto:thomas.morin@orange.com>>
Organization: Orange
Date: Tuesday 17 November 2015 at 01:37
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, BESS <bess@ietf.org<mailto:bess@ietf.org>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim, WG,

2015-11-16, Henderickx, Wim (Wim):

2015-11-13, Henderickx, Wim (Wim):
Thomas, we can discuss forever and someone need to describe requirements, b=
ut the current proposal I cannot agree to for the reasons explained.

TM> Well, although discussing forever is certainly not the goal, the reason=
s for rejecting a proposal need to be thoroughly understood.
WH> my point is what is the real driver for supporting a plain VXLAN data-p=
lane here, the use cases I have seen in this txt is always where an applica=
tion behind a NVE/TOR is demanding option c, but none of the NVE/TOR elemen=
ts.


My understanding is that the applications  are contexts where overlays are =
present is when workloads (VMs or baremetal) need to be interconnected with=
 VPNs. In these contexts, there can be reasons to want Option C to reduce t=
he state on ASBRs.

In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.

WH2> can it not be all cases: TOR/vswitch/Application. I would make the sol=
ution flexible to support all of these not?

2015-11-13, Henderickx, Wim (Wim):

TM> The right trade-off to make may in fact depend on whether you prefer:
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)

WH> b depends on the use case

I don't get what you mean by "b depends on the use case".
WH> see my above comment. If the real use case is an application behind NVE=
/TOR requiring model C, than all the discussion on impact on NVE/TOR is voi=
d. As such I want to have a discussion on the real driver/requirement for o=
ption c interworking with an IP based Fabric.

Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.

WH> for me the proposal is not acceptable for the reasons explained: too mu=
ch impact on the data-planes

I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?

WH> see above. The draft right now also requires changes in existing TOR/NV=
E so for me all this discussion/debate is void.

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support?

WH> and depending on implementation you don't need to change any of the TOR=
/vswitches.

Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?

WH> any proposal on the table requires changes, so for me this is not a val=
id discussion

See above, the proposal in the draft does not necessarily need changes in v=
switches.

Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems to me as making that alternate solution y=
ou suggest harder to implement.

WH> I would disagree to this. Tell me which switch/TOR handles multiple UDP=
 ports for VXLAN ?

I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.

-Thomas






From: Thomas Morin <thomas.morin@orange.com<mailto:thomas.morin@orange.com>=
>
Organization: Orange
Date: Friday 13 November 2015 at 09:57
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim,

I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs would be operationally viable.

However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support this kind of encap,  and even software=
-based switches may not be ready to support that today).

My take is that having different options to adapt to various implementation=
s constraints we may have would have value.

(+ one question below on VXLAN...)

-Thomas


2015-11-12, Henderickx, Wim (Wim):
On VXLAN/NVGRE, do you challenge the fact that they would be used with a du=
mmy MAC address that would be replaced by the right MAC by a sender based o=
n an ARP request when needed ?

Is the above the issue you had in mind about VXLAN and NVGRE ?

WH> yes

I you don't mind me asking : why do you challenge that ?




___________________________________________________________________________=
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they should not be distributed, used or copied without authorization.

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</head>
<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">The assumption bein=
g based on one&#8217;s view of what a DC is ;) Yes when an SP and a Cloud P=
rovider connect an inter-AS model of some form is needed.. It
 is doubtful that it would ever be Option C as the exposes a tremendous amo=
unt of internal information. At the end of the day network architecture/des=
ign whether internal/external to a provider is not mandated by the IETF or =
any standards body. This draft seems
 to mix encap, interconnect etc&#8230;. If the encap &#8220;requires&#8221;=
 a specific connectivity model than I am not sure how that exactly works.<o=
:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Jim Uttaro<o:p></o:=
p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Osama Zi=
a [mailto:osamaz@microsoft.com]
<br>
<b>Sent:</b> Thursday, November 19, 2015 1:51 PM<br>
<b>To:</b> UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); E=
XT - thomas.morin@orange.com; BESS<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Today many large enterpri=
ses connect to cloud providers using their existing MPLS VPN networks. This=
 would mean different AS Numbers at WAN and DC sites.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Regards,<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Osama<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> BESS [=
<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>UTTARO, JAMES<br>
<b>Sent:</b> Thursday, November 19, 2015 9:46 AM<br>
<b>To:</b> Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com">haoweiguo@=
huawei.com</a>&gt;; John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">=
jdrake@juniper.net</a>&gt;; Henderickx, Wim (Wim) &lt;<a href=3D"mailto:wim=
.henderickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a>&gt;;
 EXT - <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</=
a> &lt;<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</=
a>&gt;; BESS &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">A concern I have wi=
th this draft is that it pre-supposes the network architecture in terms of =
how DCs and WAN are connected. It assumes that DCs and WAN
 networks are in different AS domains. Why is that?? &nbsp;<o:p></o:p></spa=
n></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Jim Uttaro<o:p></o:=
p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> BESS [<a=
 href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Haoweiguo<br>
<b>Sent:</b> Tuesday, November 17, 2015 11:24 PM<br>
<b>To:</b> John E Drake; Henderickx, Wim (Wim); EXT - <a href=3D"mailto:tho=
mas.morin@orange.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Hi,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">The problem we are trying to solve is to reduce data center GW/A=
SBR-d's forwarding table size, the motivation is same as traditional MPLS V=
PN option-C. Currently, the most common practise on ASBR-d
 is to terminate VXLAN encapsulation, look up local routing table, and then=
 perform MPLS encapsulation to the WAN network. ASBR-d needs to maintain al=
l VM's MAC/IP. In Option-C method, only transport layer information needed =
to be maintained at GW/ASBR-d, the
 scalability will be greatly enhanced. Traditonal Option-C is only for MPLS=
 VPN network interworking, because VXLAN is becoming pervasive in data cent=
er,&nbsp; the solution in this draft was proposed for the heterogeneous net=
work interworking.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">The advantage of this solution is that only VXLAN encapsulation =
is required for OVS/TOR. Unlike Wim's solution, east-west bound traffic use=
s VXLAN encap, while north-south bound traffic uses MPLSoGRE/UDP
 encap.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">There are two solutions in this draft:<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">1. Using VXLAN tunnel destination IP for stitching at ASBR-d.<o:=
p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">No data plane modification requirements on OVS or TOR switches, =
only hardware changes on ASBR-d. ASBR-d normally is router, it has capabili=
ty to realize the hardware changes. It will consume many
 IP addresses and the IP pool for allocation needs to be configured on ASBR=
-d beforehand.
<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">2. Using VXLAN destination UDP port for stitching at ASBR-d.<o:p=
></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Compared with solution 1, less IP address will be consumed for a=
llocation. If UDP port range is too large, we can combine with solution 1 a=
nd 2.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">In this solution, both data plane modification changes are neede=
d at OVS/TOR and ASBR-d. ASBR-d also has capability to realize the hardware=
 changes. For OVS, it also can realize the data plane
 changes. For TOR switch,&nbsp;it normally can't realize this function.&nbs=
p; This solution mainly focuses on pure software based overlay network, it =
has more scalability. In public cloud data center, software based overlay n=
etwork is the majority case.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">&nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Whether using solution 1 or 2 depends on the operators real envi=
onment.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">&nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">So I think our solution has no flaws, it works fine.
<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Thanks,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">weiguo<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">&nbsp;</span><span style=3D"font-size:10.0pt;font-family:&quot;T=
ahoma&quot;,&quot;sans-serif&quot;;color:black"><o:p></o:p></span></p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"color:black">
<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
<div id=3D"divRpF197338">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:b=
lack">From:</span></b><span style=3D"font-size:10.0pt;font-family:&quot;Tah=
oma&quot;,&quot;sans-serif&quot;;color:black"> BESS [bess-bounces@ietf.org]=
 on behalf
 of John E Drake [jdrake@juniper.net]<br>
<b>Sent:</b> Wednesday, November 18, 2015 2:49<br>
<b>To:</b> Henderickx, Wim (Wim); EXT - <a href=3D"mailto:thomas.morin@oran=
ge.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Hi,</span><span style=3D"=
color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">I think Wim has conclusiv=
ely demonstrated that this draft has fatal flaws and I don&#8217;t support =
it.&nbsp; I also agree with his suggestion that we first figure out
 what problem we are trying to solve before solving it.</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> BESS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bes=
s-bounces@ietf.org</a>]
<b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
<b>Sent:</b> Tuesday, November 17, 2015 12:49 PM<br>
<b>To:</b> EXT - <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@or=
ange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&#8212; Snip &#8212;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">No, the spec as it is can b=
e implemented in its VXLAN variant with existing vswitches (e.g. OVS allows=
 to choose the VXLAN destination port, ditto for the linux
 kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; and how many ports s=
imultaneously would they support? For this to work every tenant needs a dif=
ferent VXLAN UDP destination port/receive port.&nbsp;</span><span style=3D"=
color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">There might be SW elements =
that could do some of this, but IETF defines solutions which should be impl=
emented across the board HW/SW/etc. Even if some SW switches
 can do this, the proposal will impose so many issues in HW/data-plane engi=
nes that I cannot be behind this solution.&nbsp;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">To make this work generical=
ly we will have to make changes anyhow. Given this, we better do it in the =
right way and guide the industry to a solution which does
 not imply those complexities. Otherwise we will stick with these specials =
forever with all consequences (bugs, etc).</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">- snip -</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&=
quot;;color:black">&quot;<a href=3D"mailto:thomas.morin@orange.com" target=
=3D"_blank">thomas.morin@orange.com</a>&quot; &lt;<a href=3D"mailto:thomas.=
morin@orange.com" target=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Tuesday 17 November 2015 at 01:37<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;, BESS &=
lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;=
<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi Wim, WG,<br>
<br>
2015-11-16, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
2015-11-13, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thomas, we can discuss fore=
ver and someone need to describe requirements, but the current proposal I c=
annot agree to for the reasons explained.</span><span style=3D"color:black"=
><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
TM&gt; Well, although discussing forever is certainly not the goal, the rea=
sons for rejecting a proposal need to be thoroughly understood.</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; my point is what is =
the real driver for supporting a plain VXLAN data-plane here, the use cases=
 I have seen in this txt is always where an application behind
 a NVE/TOR is demanding option c, but none of the NVE/TOR elements.</span><=
span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
My understanding is that the applications&nbsp; are contexts where overlays=
 are present is when workloads (VMs or baremetal) need to be interconnected=
 with VPNs. In these contexts, there can be reasons to want Option C to red=
uce the state on ASBRs.<br>
<br>
In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH2&gt; can it not be all c=
ases: TOR/vswitch/Application. I would make the solution flexible to suppor=
t all of these not?</span><span style=3D"color:black"><o:p></o:p></span></p=
>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">2015-11-13, Henderickx, Wim=
 (Wim):</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
TM&gt; The right trade-off to make may in fact depend on whether you prefer=
:<br>
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)<br>
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; b depends on the use=
 case
</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
I don't get what you mean by &quot;b depends on the use case&quot;. </span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; see my above comment=
. If the real use case is an application behind NVE/TOR requiring model C, =
than all the discussion on impact on NVE/TOR is void. As such
 I want to have a discussion on the real driver/requirement for option c in=
terworking with an IP based Fabric.</span><span style=3D"color:black"><o:p>=
</o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.<br>
<br>
WH&gt; for me the proposal is not acceptable for the reasons explained: too=
 much impact on the data-planes</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.<br>
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; see above. The draft=
 right now also requires changes in existing TOR/NVE so for me all this dis=
cussion/debate is void.</span><span style=3D"color:black"><o:p></o:p></span=
></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; and how many ports s=
imultaneously would they support?</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; and depending on imp=
lementation you don&#8217;t need to change any of the TOR/vswitches.</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; any proposal on the =
table requires changes, so for me this is not a valid discussion</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
See above, the proposal in the draft does not necessarily need changes in v=
switches.</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems
 to me as making that alternate solution you suggest harder to implement.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; I would disagree to =
this. Tell me which switch/TOR handles multiple UDP ports for VXLAN ?</span=
><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.<br>
<br>
-Thomas<br>
<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&=
quot;;color:black">Thomas Morin &lt;<a href=3D"mailto:thomas.morin@orange.c=
om" target=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Friday 13 November 2015 at 09:57<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi Wim,<br>
<br>
I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs
 would be operationally viable.&nbsp;&nbsp; <br>
<br>
However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support
 this kind of encap,&nbsp; and even software-based switches may not be read=
y to support that today).<br>
<br>
My take is that having different options to adapt to various implementation=
s constraints we may have would have value.<br>
<br>
(&#43; one question below on VXLAN...)<br>
<br>
-Thomas<br>
<br>
<br>
2015-11-12, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck">On VXLAN/NVGRE, do you challenge the fact that they would be used with =
a dummy MAC address that would be replaced by the right MAC
 by a sender based on an ARP request when needed ?</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
Is the above the issue you had in mind about VXLAN and NVGRE ?</span><span =
style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; yes</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
I you don't mind me asking : why do you challenge that ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<pre><span style=3D"color:black">__________________________________________=
___________________________________________________________________________=
____<o:p></o:p></span></pre>
<pre><span style=3D"color:black">&nbsp;<o:p></o:p></span></pre>
<pre><span style=3D"color:black">Ce message et ses pieces jointes peuvent c=
ontenir des informations confidentielles ou privilegiees et ne doivent donc=
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s autorisation. Si vous avez recu ce message par erreur, veuillez le signal=
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<pre><span style=3D"color:black">a l'expediteur et le detruire ainsi que le=
s pieces jointes. Les messages electroniques etant susceptibles d'alteratio=
n,<o:p></o:p></span></pre>
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From: Osama Zia <osamaz@microsoft.com>
To: "UTTARO, JAMES" <ju1738@att.com>, Haoweiguo <haoweiguo@huawei.com>, "John E Drake" <jdrake@juniper.net>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, BESS <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Archived-At: <http://mailarchive.ietf.org/arch/msg/bess/L5lpk1pMkUY4dE4xGKcr_81eVsM>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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CIL

From: UTTARO, JAMES [mailto:ju1738@att.com]
Sent: Thursday, November 19, 2015 10:56 AM
To: Osama Zia <osamaz@microsoft.com>; UTTARO, JAMES <ju1738@att.com>; Haowe=
iguo <haoweiguo@huawei.com>; John E Drake <jdrake@juniper.net>; Henderickx,=
 Wim (Wim) <wim.henderickx@alcatel-lucent.com>; EXT - thomas.morin@orange.c=
om <thomas.morin@orange.com>; BESS <bess@ietf.org>
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

The assumption being based on one's view of what a DC is ;) Yes when an SP =
and a Cloud Provider connect an inter-AS model of some form is needed.. It =
is doubtful that it would ever be Option C as the exposes a tremendous amou=
nt of internal information.
[OZ] I would beg to disagree here. Customer traffic can be tunneled to a cu=
stomer router in the cloud that should only expose customer routes. I had a=
rgued previously in IETF that current practice of option A is not scalable.

At the end of the day network architecture/design whether internal/external=
 to a provider is not mandated by the IETF or any standards body. This draf=
t seems to mix encap, interconnect etc.... If the encap "requires" a specif=
ic connectivity model than I am not sure how that exactly works.

Jim Uttaro

From: Osama Zia [mailto:osamaz@microsoft.com]
Sent: Thursday, November 19, 2015 1:51 PM
To: UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); EXT - th=
omas.morin@orange.com<mailto:thomas.morin@orange.com>; BESS
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Today many large enterprises connect to cloud providers using their existin=
g MPLS VPN networks. This would mean different AS Numbers at WAN and DC sit=
es.

Regards,
Osama

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of UTTARO, JAMES
Sent: Thursday, November 19, 2015 9:46 AM
To: Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>; John E D=
rake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Henderickx, Wim (Wim)=
 <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx@alcatel-lucent.co=
m>>; EXT - thomas.morin@orange.com<mailto:thomas.morin@orange.com> <thomas.=
morin@orange.com<mailto:thomas.morin@orange.com>>; BESS <bess@ietf.org<mail=
to:bess@ietf.org>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

A concern I have with this draft is that it pre-supposes the network archit=
ecture in terms of how DCs and WAN are connected. It assumes that DCs and W=
AN networks are in different AS domains. Why is that??

Jim Uttaro

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Haoweiguo
Sent: Tuesday, November 17, 2015 11:24 PM
To: John E Drake; Henderickx, Wim (Wim); EXT - thomas.morin@orange.com<mail=
to:thomas.morin@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc


Hi,

The problem we are trying to solve is to reduce data center GW/ASBR-d's for=
warding table size, the motivation is same as traditional MPLS VPN option-C=
. Currently, the most common practise on ASBR-d is to terminate VXLAN encap=
sulation, look up local routing table, and then perform MPLS encapsulation =
to the WAN network. ASBR-d needs to maintain all VM's MAC/IP. In Option-C m=
ethod, only transport layer information needed to be maintained at GW/ASBR-=
d, the scalability will be greatly enhanced. Traditonal Option-C is only fo=
r MPLS VPN network interworking, because VXLAN is becoming pervasive in dat=
a center,  the solution in this draft was proposed for the heterogeneous ne=
twork interworking.

The advantage of this solution is that only VXLAN encapsulation is required=
 for OVS/TOR. Unlike Wim's solution, east-west bound traffic uses VXLAN enc=
ap, while north-south bound traffic uses MPLSoGRE/UDP encap.

There are two solutions in this draft:

1. Using VXLAN tunnel destination IP for stitching at ASBR-d.

No data plane modification requirements on OVS or TOR switches, only hardwa=
re changes on ASBR-d. ASBR-d normally is router, it has capability to reali=
ze the hardware changes. It will consume many IP addresses and the IP pool =
for allocation needs to be configured on ASBR-d beforehand.

2. Using VXLAN destination UDP port for stitching at ASBR-d.

Compared with solution 1, less IP address will be consumed for allocation. =
If UDP port range is too large, we can combine with solution 1 and 2.

In this solution, both data plane modification changes are needed at OVS/TO=
R and ASBR-d. ASBR-d also has capability to realize the hardware changes. F=
or OVS, it also can realize the data plane changes. For TOR switch, it norm=
ally can't realize this function.  This solution mainly focuses on pure sof=
tware based overlay network, it has more scalability. In public cloud data =
center, software based overlay network is the majority case.



Whether using solution 1 or 2 depends on the operators real envionment.



So I think our solution has no flaws, it works fine.

Thanks,

weiguo



________________________________
From: BESS [bess-bounces@ietf.org] on behalf of John E Drake [jdrake@junipe=
r.net]
Sent: Wednesday, November 18, 2015 2:49
To: Henderickx, Wim (Wim); EXT - thomas.morin@orange.com<mailto:thomas.mori=
n@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
Hi,

I think Wim has conclusively demonstrated that this draft has fatal flaws a=
nd I don't support it.  I also agree with his suggestion that we first figu=
re out what problem we are trying to solve before solving it.

Yours Irrespectively,

John

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Tuesday, November 17, 2015 12:49 PM
To: EXT - thomas.morin@orange.com<mailto:thomas.morin@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

- Snip -

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support? For this to work =
every tenant needs a different VXLAN UDP destination port/receive port.
There might be SW elements that could do some of this, but IETF defines sol=
utions which should be implemented across the board HW/SW/etc. Even if some=
 SW switches can do this, the proposal will impose so many issues in HW/dat=
a-plane engines that I cannot be behind this solution.

To make this work generically we will have to make changes anyhow. Given th=
is, we better do it in the right way and guide the industry to a solution w=
hich does not imply those complexities. Otherwise we will stick with these =
specials forever with all consequences (bugs, etc).

- snip -

From: "thomas.morin@orange.com<mailto:thomas.morin@orange.com>" <thomas.mor=
in@orange.com<mailto:thomas.morin@orange.com>>
Organization: Orange
Date: Tuesday 17 November 2015 at 01:37
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, BESS <bess@ietf.org<mailto:bess@ietf.org>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim, WG,

2015-11-16, Henderickx, Wim (Wim):

2015-11-13, Henderickx, Wim (Wim):
Thomas, we can discuss forever and someone need to describe requirements, b=
ut the current proposal I cannot agree to for the reasons explained.

TM> Well, although discussing forever is certainly not the goal, the reason=
s for rejecting a proposal need to be thoroughly understood.
WH> my point is what is the real driver for supporting a plain VXLAN data-p=
lane here, the use cases I have seen in this txt is always where an applica=
tion behind a NVE/TOR is demanding option c, but none of the NVE/TOR elemen=
ts.


My understanding is that the applications  are contexts where overlays are =
present is when workloads (VMs or baremetal) need to be interconnected with=
 VPNs. In these contexts, there can be reasons to want Option C to reduce t=
he state on ASBRs.

In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.

WH2> can it not be all cases: TOR/vswitch/Application. I would make the sol=
ution flexible to support all of these not?

2015-11-13, Henderickx, Wim (Wim):

TM> The right trade-off to make may in fact depend on whether you prefer:
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)

WH> b depends on the use case

I don't get what you mean by "b depends on the use case".
WH> see my above comment. If the real use case is an application behind NVE=
/TOR requiring model C, than all the discussion on impact on NVE/TOR is voi=
d. As such I want to have a discussion on the real driver/requirement for o=
ption c interworking with an IP based Fabric.

Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.

WH> for me the proposal is not acceptable for the reasons explained: too mu=
ch impact on the data-planes

I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?

WH> see above. The draft right now also requires changes in existing TOR/NV=
E so for me all this discussion/debate is void.

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support?

WH> and depending on implementation you don't need to change any of the TOR=
/vswitches.

Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?

WH> any proposal on the table requires changes, so for me this is not a val=
id discussion

See above, the proposal in the draft does not necessarily need changes in v=
switches.

Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems to me as making that alternate solution y=
ou suggest harder to implement.

WH> I would disagree to this. Tell me which switch/TOR handles multiple UDP=
 ports for VXLAN ?

I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.

-Thomas




From: Thomas Morin <thomas.morin@orange.com<mailto:thomas.morin@orange.com>=
>
Organization: Orange
Date: Friday 13 November 2015 at 09:57
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim,

I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs would be operationally viable.

However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support this kind of encap,  and even software=
-based switches may not be ready to support that today).

My take is that having different options to adapt to various implementation=
s constraints we may have would have value.

(+ one question below on VXLAN...)

-Thomas


2015-11-12, Henderickx, Wim (Wim):
On VXLAN/NVGRE, do you challenge the fact that they would be used with a du=
mmy MAC address that would be replaced by the right MAC by a sender based o=
n an ARP request when needed ?

Is the above the issue you had in mind about VXLAN and NVGRE ?

WH> yes

I you don't mind me asking : why do you challenge that ?




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</head>
<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">CIL<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> UTTARO, JAMES [mailto:ju1738@a=
tt.com]
<br>
<b>Sent:</b> Thursday, November 19, 2015 10:56 AM<br>
<b>To:</b> Osama Zia &lt;osamaz@microsoft.com&gt;; UTTARO, JAMES &lt;ju1738=
@att.com&gt;; Haoweiguo &lt;haoweiguo@huawei.com&gt;; John E Drake &lt;jdra=
ke@juniper.net&gt;; Henderickx, Wim (Wim) &lt;wim.henderickx@alcatel-lucent=
.com&gt;; EXT - thomas.morin@orange.com &lt;thomas.morin@orange.com&gt;;
 BESS &lt;bess@ietf.org&gt;<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">The assumption being based on o=
ne&#8217;s view of what a DC is ;) Yes when an SP and a Cloud Provider conn=
ect an inter-AS model of some form is needed.. It is
 doubtful that it would ever be Option C as the exposes a tremendous amount=
 of internal information.
<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><i><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">[OZ] I would beg to disagree here. Customer traf=
fic can be tunneled to a customer router in the cloud that should only expo=
se customer routes. I had argued previously in
 IETF that current practice of option A is not scalable. <o:p></o:p></span>=
</i></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">At the end of the day network a=
rchitecture/design whether internal/external to a provider is not mandated =
by the IETF or any standards body. This draft
 seems to mix encap, interconnect etc&#8230;. If the encap &#8220;requires&=
#8221; a specific connectivity model than I am not sure how that exactly wo=
rks.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">Jim Uttaro<o:p></o:p></span></i=
></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Osama Zia [<a href=3D"mailto:osa=
maz@microsoft.com">mailto:osamaz@microsoft.com</a>]
<br>
<b>Sent:</b> Thursday, November 19, 2015 1:51 PM<br>
<b>To:</b> UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); E=
XT - <a href=3D"mailto:thomas.morin@orange.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Today many large enterprises connect =
to cloud providers using their existing MPLS VPN networks. This would mean =
different AS Numbers at WAN and DC sites.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Osama<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> BESS [<a href=3D"mailto:bess-b=
ounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>UTTARO, JAMES<br>
<b>Sent:</b> Thursday, November 19, 2015 9:46 AM<br>
<b>To:</b> Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com">haoweiguo@=
huawei.com</a>&gt;; John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">=
jdrake@juniper.net</a>&gt;; Henderickx, Wim (Wim) &lt;<a href=3D"mailto:wim=
.henderickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a>&gt;;
 EXT - <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</=
a> &lt;<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</=
a>&gt;; BESS &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">A concern I have with this draf=
t is that it pre-supposes the network architecture in terms of how DCs and =
WAN are connected. It assumes that DCs and WAN
 networks are in different AS domains. Why is that?? &nbsp;<o:p></o:p></spa=
n></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">Jim Uttaro<o:p></o:p></span></i=
></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> BESS [<a href=3D"mailto:bess-bou=
nces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Haoweiguo<br>
<b>Sent:</b> Tuesday, November 17, 2015 11:24 PM<br>
<b>To:</b> John E Drake; Henderickx, Wim (Wim); EXT - <a href=3D"mailto:tho=
mas.morin@orange.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">H=
i,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
he problem we are trying to solve is to reduce data center GW/ASBR-d's forw=
arding table size, the motivation is same as traditional MPLS VPN option-C.=
 Currently, the most common practise on ASBR-d
 is to terminate VXLAN encapsulation, look up local routing table, and then=
 perform MPLS encapsulation to the WAN network. ASBR-d needs to maintain al=
l VM's MAC/IP. In Option-C method, only transport layer information needed =
to be maintained at GW/ASBR-d, the
 scalability will be greatly enhanced. Traditonal Option-C is only for MPLS=
 VPN network interworking, because VXLAN is becoming pervasive in data cent=
er,&nbsp; the solution in this draft was proposed for the heterogeneous net=
work interworking.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
he advantage of this solution is that only VXLAN encapsulation is required =
for OVS/TOR. Unlike Wim's solution, east-west bound traffic uses VXLAN enca=
p, while north-south bound traffic uses MPLSoGRE/UDP
 encap.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
here are two solutions in this draft:<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">1=
. Using VXLAN tunnel destination IP for stitching at ASBR-d.<o:p></o:p></sp=
an></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">N=
o data plane modification requirements on OVS or TOR switches, only hardwar=
e changes on ASBR-d. ASBR-d normally is router, it has capability to realiz=
e the hardware changes. It will consume many
 IP addresses and the IP pool for allocation needs to be configured on ASBR=
-d beforehand.
<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">2=
. Using VXLAN destination UDP port for stitching at ASBR-d.<o:p></o:p></spa=
n></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">C=
ompared with solution 1, less IP address will be consumed for allocation. I=
f UDP port range is too large, we can combine with solution 1 and 2.<o:p></=
o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">I=
n this solution, both data plane modification changes are needed at OVS/TOR=
 and ASBR-d. ASBR-d also has capability to realize the hardware changes. Fo=
r OVS, it also can realize the data plane changes.
 For TOR switch,&nbsp;it normally can't realize this function.&nbsp; This s=
olution mainly focuses on pure software based overlay network, it has more =
scalability. In public cloud data center, software based overlay network is=
 the majority case.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">&=
nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">W=
hether using solution 1 or 2 depends on the operators real envionment.<o:p>=
</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">&=
nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">S=
o I think our solution has no flaws, it works fine.
<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
hanks,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">w=
eiguo<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">&=
nbsp;</span><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black"><o:p></o:p></span></p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"color:black">
<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
<div id=3D"divRpF197338">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">From:<=
/span></b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sa=
ns-serif;color:black"> BESS [bess-bounces@ietf.org] on behalf
 of John E Drake [jdrake@juniper.net]<br>
<b>Sent:</b> Wednesday, November 18, 2015 2:49<br>
<b>To:</b> Henderickx, Wim (Wim); EXT - <a href=3D"mailto:thomas.morin@oran=
ge.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Hi,</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I think Wim has conclusively demonstr=
ated that this draft has fatal flaws and I don&#8217;t support it.&nbsp; I =
also agree with his suggestion that we first figure out what
 problem we are trying to solve before solving it.</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> BESS [=
<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
<b>Sent:</b> Tuesday, November 17, 2015 12:49 PM<br>
<b>To:</b> EXT - <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@or=
ange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&#8212; Snip &#8212;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">No, the spec as it is can be implemente=
d in its VXLAN variant with existing vswitches (e.g. OVS allows to choose t=
he VXLAN destination port, ditto for the linux
 kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; and how many ports simultaneousl=
y would they support? For this to work every tenant needs a different VXLAN=
 UDP destination port/receive port.&nbsp;</span><span style=3D"color:black"=
><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">There might be SW elements that could d=
o some of this, but IETF defines solutions which should be implemented acro=
ss the board HW/SW/etc. Even if some SW switches
 can do this, the proposal will impose so many issues in HW/data-plane engi=
nes that I cannot be behind this solution.&nbsp;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">To make this work generically we will h=
ave to make changes anyhow. Given this, we better do it in the right way an=
d guide the industry to a solution which does
 not imply those complexities. Otherwise we will stick with these specials =
forever with all consequences (bugs, etc).</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">- snip -</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:=
black">&quot;<a href=3D"mailto:thomas.morin@orange.com" target=3D"_blank">t=
homas.morin@orange.com</a>&quot; &lt;<a href=3D"mailto:thomas.morin@orange.=
com" target=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Tuesday 17 November 2015 at 01:37<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;, BESS &=
lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;=
<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi Wim, WG,<br>
<br>
2015-11-16, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
2015-11-13, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thomas, we can discuss forever and some=
one need to describe requirements, but the current proposal I cannot agree =
to for the reasons explained.</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
TM&gt; Well, although discussing forever is certainly not the goal, the rea=
sons for rejecting a proposal need to be thoroughly understood.</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; my point is what is the real dri=
ver for supporting a plain VXLAN data-plane here, the use cases I have seen=
 in this txt is always where an application behind
 a NVE/TOR is demanding option c, but none of the NVE/TOR elements.</span><=
span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
My understanding is that the applications&nbsp; are contexts where overlays=
 are present is when workloads (VMs or baremetal) need to be interconnected=
 with VPNs. In these contexts, there can be reasons to want Option C to red=
uce the state on ASBRs.<br>
<br>
In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH2&gt; can it not be all cases: TOR/vs=
witch/Application. I would make the solution flexible to support all of the=
se not?</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">2015-11-13, Henderickx, Wim (Wim):</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
TM&gt; The right trade-off to make may in fact depend on whether you prefer=
:<br>
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)<br>
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; b depends on the use case
</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
I don't get what you mean by &quot;b depends on the use case&quot;. </span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; see my above comment. If the rea=
l use case is an application behind NVE/TOR requiring model C, than all the=
 discussion on impact on NVE/TOR is void. As such
 I want to have a discussion on the real driver/requirement for option c in=
terworking with an IP based Fabric.</span><span style=3D"color:black"><o:p>=
</o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><br>
Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.<br>
<br>
WH&gt; for me the proposal is not acceptable for the reasons explained: too=
 much impact on the data-planes</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.<br>
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; see above. The draft right now a=
lso requires changes in existing TOR/NVE so for me all this discussion/deba=
te is void.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; and how many ports simultaneousl=
y would they support?</span><span style=3D"color:black"><o:p></o:p></span><=
/p>
</div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; and depending on implementation =
you don&#8217;t need to change any of the TOR/vswitches.</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; any proposal on the table requir=
es changes, so for me this is not a valid discussion</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><br>
See above, the proposal in the draft does not necessarily need changes in v=
switches.</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems
 to me as making that alternate solution you suggest harder to implement.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; I would disagree to this. Tell m=
e which switch/TOR handles multiple UDP ports for VXLAN ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><br>
I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.<br>
<br>
-Thomas<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:=
black">Thomas Morin &lt;<a href=3D"mailto:thomas.morin@orange.com" target=
=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Friday 13 November 2015 at 09:57<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi Wim,<br>
<br>
I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs
 would be operationally viable.&nbsp;&nbsp; <br>
<br>
However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support
 this kind of encap,&nbsp; and even software-based switches may not be read=
y to support that today).<br>
<br>
My take is that having different options to adapt to various implementation=
s constraints we may have would have value.<br>
<br>
(&#43; one question below on VXLAN...)<br>
<br>
-Thomas<br>
<br>
<br>
2015-11-12, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">On VXLAN=
/NVGRE, do you challenge the fact that they would be used with a dummy MAC =
address that would be replaced by the right MAC
 by a sender based on an ARP request when needed ?</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
Is the above the issue you had in mind about VXLAN and NVGRE ?</span><span =
style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; yes</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><br>
I you don't mind me asking : why do you challenge that ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<pre><span style=3D"color:black">__________________________________________=
___________________________________________________________________________=
____<o:p></o:p></span></pre>
<pre><span style=3D"color:black">&nbsp;<o:p></o:p></span></pre>
<pre><span style=3D"color:black">Ce message et ses pieces jointes peuvent c=
ontenir des informations confidentielles ou privilegiees et ne doivent donc=
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s autorisation. Si vous avez recu ce message par erreur, veuillez le signal=
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<pre><span style=3D"color:black">a l'expediteur et le detruire ainsi que le=
s pieces jointes. Les messages electroniques etant susceptibles d'alteratio=
n,<o:p></o:p></span></pre>
<pre><span style=3D"color:black">France Telecom - Orange decline toute resp=
onsabilite si ce message a ete altere, deforme ou falsifie. Merci<o:p></o:p=
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From: "UTTARO, JAMES" <ju1738@att.com>
To: Osama Zia <osamaz@microsoft.com>, "UTTARO, JAMES" <ju1738@att.com>, Haoweiguo <haoweiguo@huawei.com>, John E Drake <jdrake@juniper.net>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, BESS <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Archived-At: <http://mailarchive.ietf.org/arch/msg/bess/098g3l92_WhdQpM4puTroHXniys>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Comments In-Line..

Jim Uttaro

From: Osama Zia [mailto:osamaz@microsoft.com]
Sent: Thursday, November 19, 2015 2:06 PM
To: UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); EXT - th=
omas.morin@orange.com; BESS
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

CIL

From: UTTARO, JAMES [mailto:ju1738@att.com]
Sent: Thursday, November 19, 2015 10:56 AM
To: Osama Zia <osamaz@microsoft.com<mailto:osamaz@microsoft.com>>; UTTARO, =
JAMES <ju1738@att.com<mailto:ju1738@att.com>>; Haoweiguo <haoweiguo@huawei.=
com<mailto:haoweiguo@huawei.com>>; John E Drake <jdrake@juniper.net<mailto:=
jdrake@juniper.net>>; Henderickx, Wim (Wim) <wim.henderickx@alcatel-lucent.=
com<mailto:wim.henderickx@alcatel-lucent.com>>; EXT - thomas.morin@orange.c=
om<mailto:thomas.morin@orange.com> <thomas.morin@orange.com<mailto:thomas.m=
orin@orange.com>>; BESS <bess@ietf.org<mailto:bess@ietf.org>>
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

The assumption being based on one's view of what a DC is ;) Yes when an SP =
and a Cloud Provider connect an inter-AS model of some form is needed.. It =
is doubtful that it would ever be Option C as the exposes a tremendous amou=
nt of internal information.
[OZ] I would beg to disagree here. Customer traffic can be tunneled to a cu=
stomer router in the cloud that should only expose customer routes. I had a=
rgued previously in IETF that current practice of option A is not scalable.
[Jim U>] So, do you mean a CSC model where the NHs are the customer CEs, if=
 so, then that is not Classical Option C where PE LBs are exchanged as the =
NHs for the customers path/routes.

At the end of the day network architecture/design whether internal/external=
 to a provider is not mandated by the IETF or any standards body. This draf=
t seems to mix encap, interconnect etc.... If the encap "requires" a specif=
ic connectivity model than I am not sure how that exactly works.

Jim Uttaro

From: Osama Zia [mailto:osamaz@microsoft.com]
Sent: Thursday, November 19, 2015 1:51 PM
To: UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); EXT - th=
omas.morin@orange.com<mailto:thomas.morin@orange.com>; BESS
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Today many large enterprises connect to cloud providers using their existin=
g MPLS VPN networks. This would mean different AS Numbers at WAN and DC sit=
es.

Regards,
Osama

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of UTTARO, JAMES
Sent: Thursday, November 19, 2015 9:46 AM
To: Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>; John E D=
rake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Henderickx, Wim (Wim)=
 <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx@alcatel-lucent.co=
m>>; EXT - thomas.morin@orange.com<mailto:thomas.morin@orange.com> <thomas.=
morin@orange.com<mailto:thomas.morin@orange.com>>; BESS <bess@ietf.org<mail=
to:bess@ietf.org>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

A concern I have with this draft is that it pre-supposes the network archit=
ecture in terms of how DCs and WAN are connected. It assumes that DCs and W=
AN networks are in different AS domains. Why is that??

Jim Uttaro

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Haoweiguo
Sent: Tuesday, November 17, 2015 11:24 PM
To: John E Drake; Henderickx, Wim (Wim); EXT - thomas.morin@orange.com<mail=
to:thomas.morin@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc


Hi,

The problem we are trying to solve is to reduce data center GW/ASBR-d's for=
warding table size, the motivation is same as traditional MPLS VPN option-C=
. Currently, the most common practise on ASBR-d is to terminate VXLAN encap=
sulation, look up local routing table, and then perform MPLS encapsulation =
to the WAN network. ASBR-d needs to maintain all VM's MAC/IP. In Option-C m=
ethod, only transport layer information needed to be maintained at GW/ASBR-=
d, the scalability will be greatly enhanced. Traditonal Option-C is only fo=
r MPLS VPN network interworking, because VXLAN is becoming pervasive in dat=
a center,  the solution in this draft was proposed for the heterogeneous ne=
twork interworking.

The advantage of this solution is that only VXLAN encapsulation is required=
 for OVS/TOR. Unlike Wim's solution, east-west bound traffic uses VXLAN enc=
ap, while north-south bound traffic uses MPLSoGRE/UDP encap.

There are two solutions in this draft:

1. Using VXLAN tunnel destination IP for stitching at ASBR-d.

No data plane modification requirements on OVS or TOR switches, only hardwa=
re changes on ASBR-d. ASBR-d normally is router, it has capability to reali=
ze the hardware changes. It will consume many IP addresses and the IP pool =
for allocation needs to be configured on ASBR-d beforehand.

2. Using VXLAN destination UDP port for stitching at ASBR-d.

Compared with solution 1, less IP address will be consumed for allocation. =
If UDP port range is too large, we can combine with solution 1 and 2.

In this solution, both data plane modification changes are needed at OVS/TO=
R and ASBR-d. ASBR-d also has capability to realize the hardware changes. F=
or OVS, it also can realize the data plane changes. For TOR switch, it norm=
ally can't realize this function.  This solution mainly focuses on pure sof=
tware based overlay network, it has more scalability. In public cloud data =
center, software based overlay network is the majority case.



Whether using solution 1 or 2 depends on the operators real envionment.



So I think our solution has no flaws, it works fine.

Thanks,

weiguo



________________________________
From: BESS [bess-bounces@ietf.org] on behalf of John E Drake [jdrake@junipe=
r.net]
Sent: Wednesday, November 18, 2015 2:49
To: Henderickx, Wim (Wim); EXT - thomas.morin@orange.com<mailto:thomas.mori=
n@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
Hi,

I think Wim has conclusively demonstrated that this draft has fatal flaws a=
nd I don't support it.  I also agree with his suggestion that we first figu=
re out what problem we are trying to solve before solving it.

Yours Irrespectively,

John

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Tuesday, November 17, 2015 12:49 PM
To: EXT - thomas.morin@orange.com<mailto:thomas.morin@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

- Snip -

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support? For this to work =
every tenant needs a different VXLAN UDP destination port/receive port.
There might be SW elements that could do some of this, but IETF defines sol=
utions which should be implemented across the board HW/SW/etc. Even if some=
 SW switches can do this, the proposal will impose so many issues in HW/dat=
a-plane engines that I cannot be behind this solution.

To make this work generically we will have to make changes anyhow. Given th=
is, we better do it in the right way and guide the industry to a solution w=
hich does not imply those complexities. Otherwise we will stick with these =
specials forever with all consequences (bugs, etc).

- snip -

From: "thomas.morin@orange.com<mailto:thomas.morin@orange.com>" <thomas.mor=
in@orange.com<mailto:thomas.morin@orange.com>>
Organization: Orange
Date: Tuesday 17 November 2015 at 01:37
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, BESS <bess@ietf.org<mailto:bess@ietf.org>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim, WG,

2015-11-16, Henderickx, Wim (Wim):

2015-11-13, Henderickx, Wim (Wim):
Thomas, we can discuss forever and someone need to describe requirements, b=
ut the current proposal I cannot agree to for the reasons explained.

TM> Well, although discussing forever is certainly not the goal, the reason=
s for rejecting a proposal need to be thoroughly understood.
WH> my point is what is the real driver for supporting a plain VXLAN data-p=
lane here, the use cases I have seen in this txt is always where an applica=
tion behind a NVE/TOR is demanding option c, but none of the NVE/TOR elemen=
ts.


My understanding is that the applications  are contexts where overlays are =
present is when workloads (VMs or baremetal) need to be interconnected with=
 VPNs. In these contexts, there can be reasons to want Option C to reduce t=
he state on ASBRs.

In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.

WH2> can it not be all cases: TOR/vswitch/Application. I would make the sol=
ution flexible to support all of these not?

2015-11-13, Henderickx, Wim (Wim):

TM> The right trade-off to make may in fact depend on whether you prefer:
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)

WH> b depends on the use case

I don't get what you mean by "b depends on the use case".
WH> see my above comment. If the real use case is an application behind NVE=
/TOR requiring model C, than all the discussion on impact on NVE/TOR is voi=
d. As such I want to have a discussion on the real driver/requirement for o=
ption c interworking with an IP based Fabric.

Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.

WH> for me the proposal is not acceptable for the reasons explained: too mu=
ch impact on the data-planes

I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?

WH> see above. The draft right now also requires changes in existing TOR/NV=
E so for me all this discussion/debate is void.

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support?

WH> and depending on implementation you don't need to change any of the TOR=
/vswitches.

Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?

WH> any proposal on the table requires changes, so for me this is not a val=
id discussion

See above, the proposal in the draft does not necessarily need changes in v=
switches.

Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems to me as making that alternate solution y=
ou suggest harder to implement.

WH> I would disagree to this. Tell me which switch/TOR handles multiple UDP=
 ports for VXLAN ?

I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.

-Thomas



From: Thomas Morin <thomas.morin@orange.com<mailto:thomas.morin@orange.com>=
>
Organization: Orange
Date: Friday 13 November 2015 at 09:57
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim,

I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs would be operationally viable.

However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support this kind of encap,  and even software=
-based switches may not be ready to support that today).

My take is that having different options to adapt to various implementation=
s constraints we may have would have value.

(+ one question below on VXLAN...)

-Thomas


2015-11-12, Henderickx, Wim (Wim):
On VXLAN/NVGRE, do you challenge the fact that they would be used with a du=
mmy MAC address that would be replaced by the right MAC by a sender based o=
n an ARP request when needed ?

Is the above the issue you had in mind about VXLAN and NVGRE ?

WH> yes

I you don't mind me asking : why do you challenge that ?




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</head>
<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Comments In-Line..<=
o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Jim Uttaro<o:p></o:=
p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Osama Zi=
a [mailto:osamaz@microsoft.com]
<br>
<b>Sent:</b> Thursday, November 19, 2015 2:06 PM<br>
<b>To:</b> UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); E=
XT - thomas.morin@orange.com; BESS<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">CIL<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> UTTARO=
, JAMES [<a href=3D"mailto:ju1738@att.com">mailto:ju1738@att.com</a>]
<br>
<b>Sent:</b> Thursday, November 19, 2015 10:56 AM<br>
<b>To:</b> Osama Zia &lt;<a href=3D"mailto:osamaz@microsoft.com">osamaz@mic=
rosoft.com</a>&gt;; UTTARO, JAMES &lt;<a href=3D"mailto:ju1738@att.com">ju1=
738@att.com</a>&gt;; Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com">=
haoweiguo@huawei.com</a>&gt;; John E Drake &lt;<a href=3D"mailto:jdrake@jun=
iper.net">jdrake@juniper.net</a>&gt;;
 Henderickx, Wim (Wim) &lt;<a href=3D"mailto:wim.henderickx@alcatel-lucent.=
com">wim.henderickx@alcatel-lucent.com</a>&gt;; EXT -
<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</a> &lt;=
<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</a>&gt;;=
 BESS &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">The assumption bein=
g based on one&#8217;s view of what a DC is ;) Yes when an SP and a Cloud P=
rovider connect an inter-AS model of some form is needed.. It
 is doubtful that it would ever be Option C as the exposes a tremendous amo=
unt of internal information.
<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><i><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">[OZ] I would beg to disagree here. C=
ustomer traffic can be tunneled to a customer router in the cloud that shou=
ld only expose customer routes. I had argued previously
 in IETF that current practice of option A is not scalable. <o:p></o:p></sp=
an></i></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">[Jim U&gt;] So, do =
you mean a CSC model where the NHs are the customer CEs, if so, then that i=
s not Classical Option C where PE LBs are exchanged as the
 NHs for the customers path/routes.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">At the end of the d=
ay network architecture/design whether internal/external to a provider is n=
ot mandated by the IETF or any standards body. This draft
 seems to mix encap, interconnect etc&#8230;. If the encap &#8220;requires&=
#8221; a specific connectivity model than I am not sure how that exactly wo=
rks.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Jim Uttaro<o:p></o:=
p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Osama Zi=
a [<a href=3D"mailto:osamaz@microsoft.com">mailto:osamaz@microsoft.com</a>]
<br>
<b>Sent:</b> Thursday, November 19, 2015 1:51 PM<br>
<b>To:</b> UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); E=
XT - <a href=3D"mailto:thomas.morin@orange.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Today many large enterpri=
ses connect to cloud providers using their existing MPLS VPN networks. This=
 would mean different AS Numbers at WAN and DC sites.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Regards,<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Osama<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> BESS [=
<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>UTTARO, JAMES<br>
<b>Sent:</b> Thursday, November 19, 2015 9:46 AM<br>
<b>To:</b> Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com">haoweiguo@=
huawei.com</a>&gt;; John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">=
jdrake@juniper.net</a>&gt;; Henderickx, Wim (Wim) &lt;<a href=3D"mailto:wim=
.henderickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a>&gt;;
 EXT - <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</=
a> &lt;<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</=
a>&gt;; BESS &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">A concern I have wi=
th this draft is that it pre-supposes the network architecture in terms of =
how DCs and WAN are connected. It assumes that DCs and WAN
 networks are in different AS domains. Why is that?? &nbsp;<o:p></o:p></spa=
n></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Jim Uttaro<o:p></o:=
p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> BESS [<a=
 href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Haoweiguo<br>
<b>Sent:</b> Tuesday, November 17, 2015 11:24 PM<br>
<b>To:</b> John E Drake; Henderickx, Wim (Wim); EXT - <a href=3D"mailto:tho=
mas.morin@orange.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Hi,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">The problem we are trying to solve is to reduce data center GW/A=
SBR-d's forwarding table size, the motivation is same as traditional MPLS V=
PN option-C. Currently, the most common practise on ASBR-d
 is to terminate VXLAN encapsulation, look up local routing table, and then=
 perform MPLS encapsulation to the WAN network. ASBR-d needs to maintain al=
l VM's MAC/IP. In Option-C method, only transport layer information needed =
to be maintained at GW/ASBR-d, the
 scalability will be greatly enhanced. Traditonal Option-C is only for MPLS=
 VPN network interworking, because VXLAN is becoming pervasive in data cent=
er,&nbsp; the solution in this draft was proposed for the heterogeneous net=
work interworking.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">The advantage of this solution is that only VXLAN encapsulation =
is required for OVS/TOR. Unlike Wim's solution, east-west bound traffic use=
s VXLAN encap, while north-south bound traffic uses MPLSoGRE/UDP
 encap.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">There are two solutions in this draft:<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">1. Using VXLAN tunnel destination IP for stitching at ASBR-d.<o:=
p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">No data plane modification requirements on OVS or TOR switches, =
only hardware changes on ASBR-d. ASBR-d normally is router, it has capabili=
ty to realize the hardware changes. It will consume many
 IP addresses and the IP pool for allocation needs to be configured on ASBR=
-d beforehand.
<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">2. Using VXLAN destination UDP port for stitching at ASBR-d.<o:p=
></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Compared with solution 1, less IP address will be consumed for a=
llocation. If UDP port range is too large, we can combine with solution 1 a=
nd 2.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">In this solution, both data plane modification changes are neede=
d at OVS/TOR and ASBR-d. ASBR-d also has capability to realize the hardware=
 changes. For OVS, it also can realize the data plane
 changes. For TOR switch,&nbsp;it normally can't realize this function.&nbs=
p; This solution mainly focuses on pure software based overlay network, it =
has more scalability. In public cloud data center, software based overlay n=
etwork is the majority case.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">&nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Whether using solution 1 or 2 depends on the operators real envi=
onment.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">&nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">So I think our solution has no flaws, it works fine.
<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Thanks,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">weiguo<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">&nbsp;</span><span style=3D"font-size:10.0pt;font-family:&quot;T=
ahoma&quot;,&quot;sans-serif&quot;;color:black"><o:p></o:p></span></p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"color:black">
<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
<div id=3D"divRpF197338">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:b=
lack">From:</span></b><span style=3D"font-size:10.0pt;font-family:&quot;Tah=
oma&quot;,&quot;sans-serif&quot;;color:black"> BESS [bess-bounces@ietf.org]=
 on behalf
 of John E Drake [jdrake@juniper.net]<br>
<b>Sent:</b> Wednesday, November 18, 2015 2:49<br>
<b>To:</b> Henderickx, Wim (Wim); EXT - <a href=3D"mailto:thomas.morin@oran=
ge.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Hi,</span><span style=3D"=
color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">I think Wim has conclusiv=
ely demonstrated that this draft has fatal flaws and I don&#8217;t support =
it.&nbsp; I also agree with his suggestion that we first figure out
 what problem we are trying to solve before solving it.</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> BESS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bes=
s-bounces@ietf.org</a>]
<b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
<b>Sent:</b> Tuesday, November 17, 2015 12:49 PM<br>
<b>To:</b> EXT - <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@or=
ange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&#8212; Snip &#8212;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">No, the spec as it is can b=
e implemented in its VXLAN variant with existing vswitches (e.g. OVS allows=
 to choose the VXLAN destination port, ditto for the linux
 kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; and how many ports s=
imultaneously would they support? For this to work every tenant needs a dif=
ferent VXLAN UDP destination port/receive port.&nbsp;</span><span style=3D"=
color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">There might be SW elements =
that could do some of this, but IETF defines solutions which should be impl=
emented across the board HW/SW/etc. Even if some SW switches
 can do this, the proposal will impose so many issues in HW/data-plane engi=
nes that I cannot be behind this solution.&nbsp;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">To make this work generical=
ly we will have to make changes anyhow. Given this, we better do it in the =
right way and guide the industry to a solution which does
 not imply those complexities. Otherwise we will stick with these specials =
forever with all consequences (bugs, etc).</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">- snip -</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&=
quot;;color:black">&quot;<a href=3D"mailto:thomas.morin@orange.com" target=
=3D"_blank">thomas.morin@orange.com</a>&quot; &lt;<a href=3D"mailto:thomas.=
morin@orange.com" target=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Tuesday 17 November 2015 at 01:37<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;, BESS &=
lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;=
<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi Wim, WG,<br>
<br>
2015-11-16, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
2015-11-13, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thomas, we can discuss fore=
ver and someone need to describe requirements, but the current proposal I c=
annot agree to for the reasons explained.</span><span style=3D"color:black"=
><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
TM&gt; Well, although discussing forever is certainly not the goal, the rea=
sons for rejecting a proposal need to be thoroughly understood.</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; my point is what is =
the real driver for supporting a plain VXLAN data-plane here, the use cases=
 I have seen in this txt is always where an application behind
 a NVE/TOR is demanding option c, but none of the NVE/TOR elements.</span><=
span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
My understanding is that the applications&nbsp; are contexts where overlays=
 are present is when workloads (VMs or baremetal) need to be interconnected=
 with VPNs. In these contexts, there can be reasons to want Option C to red=
uce the state on ASBRs.<br>
<br>
In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH2&gt; can it not be all c=
ases: TOR/vswitch/Application. I would make the solution flexible to suppor=
t all of these not?</span><span style=3D"color:black"><o:p></o:p></span></p=
>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">2015-11-13, Henderickx, Wim=
 (Wim):</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
TM&gt; The right trade-off to make may in fact depend on whether you prefer=
:<br>
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)<br>
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; b depends on the use=
 case
</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
I don't get what you mean by &quot;b depends on the use case&quot;. </span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; see my above comment=
. If the real use case is an application behind NVE/TOR requiring model C, =
than all the discussion on impact on NVE/TOR is void. As such
 I want to have a discussion on the real driver/requirement for option c in=
terworking with an IP based Fabric.</span><span style=3D"color:black"><o:p>=
</o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.<br>
<br>
WH&gt; for me the proposal is not acceptable for the reasons explained: too=
 much impact on the data-planes</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.<br>
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; see above. The draft=
 right now also requires changes in existing TOR/NVE so for me all this dis=
cussion/debate is void.</span><span style=3D"color:black"><o:p></o:p></span=
></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; and how many ports s=
imultaneously would they support?</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; and depending on imp=
lementation you don&#8217;t need to change any of the TOR/vswitches.</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; any proposal on the =
table requires changes, so for me this is not a valid discussion</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
See above, the proposal in the draft does not necessarily need changes in v=
switches.</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems
 to me as making that alternate solution you suggest harder to implement.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; I would disagree to =
this. Tell me which switch/TOR handles multiple UDP ports for VXLAN ?</span=
><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.<br>
<br>
-Thomas</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&=
quot;;color:black">Thomas Morin &lt;<a href=3D"mailto:thomas.morin@orange.c=
om" target=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Friday 13 November 2015 at 09:57<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi Wim,<br>
<br>
I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs
 would be operationally viable.&nbsp;&nbsp; <br>
<br>
However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support
 this kind of encap,&nbsp; and even software-based switches may not be read=
y to support that today).<br>
<br>
My take is that having different options to adapt to various implementation=
s constraints we may have would have value.<br>
<br>
(&#43; one question below on VXLAN...)<br>
<br>
-Thomas<br>
<br>
<br>
2015-11-12, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck">On VXLAN/NVGRE, do you challenge the fact that they would be used with =
a dummy MAC address that would be replaced by the right MAC
 by a sender based on an ARP request when needed ?</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
Is the above the issue you had in mind about VXLAN and NVGRE ?</span><span =
style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; yes</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
I you don't mind me asking : why do you challenge that ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<pre><span style=3D"color:black">__________________________________________=
___________________________________________________________________________=
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s pieces jointes. Les messages electroniques etant susceptibles d'alteratio=
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From: Osama Zia <osamaz@microsoft.com>
To: "UTTARO, JAMES" <ju1738@att.com>, Haoweiguo <haoweiguo@huawei.com>, "John E Drake" <jdrake@juniper.net>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, BESS <bess@ietf.org>
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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CIL

From: UTTARO, JAMES [mailto:ju1738@att.com]
Sent: Thursday, November 19, 2015 11:16 AM
To: Osama Zia <osamaz@microsoft.com>; UTTARO, JAMES <ju1738@att.com>; Haowe=
iguo <haoweiguo@huawei.com>; John E Drake <jdrake@juniper.net>; Henderickx,=
 Wim (Wim) <wim.henderickx@alcatel-lucent.com>; EXT - thomas.morin@orange.c=
om <thomas.morin@orange.com>; BESS <bess@ietf.org>
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Comments In-Line..

Jim Uttaro

From: Osama Zia [mailto:osamaz@microsoft.com]
Sent: Thursday, November 19, 2015 2:06 PM
To: UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); EXT - th=
omas.morin@orange.com<mailto:thomas.morin@orange.com>; BESS
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

CIL

From: UTTARO, JAMES [mailto:ju1738@att.com]
Sent: Thursday, November 19, 2015 10:56 AM
To: Osama Zia <osamaz@microsoft.com<mailto:osamaz@microsoft.com>>; UTTARO, =
JAMES <ju1738@att.com<mailto:ju1738@att.com>>; Haoweiguo <haoweiguo@huawei.=
com<mailto:haoweiguo@huawei.com>>; John E Drake <jdrake@juniper.net<mailto:=
jdrake@juniper.net>>; Henderickx, Wim (Wim) <wim.henderickx@alcatel-lucent.=
com<mailto:wim.henderickx@alcatel-lucent.com>>; EXT - thomas.morin@orange.c=
om<mailto:thomas.morin@orange.com> <thomas.morin@orange.com<mailto:thomas.m=
orin@orange.com>>; BESS <bess@ietf.org<mailto:bess@ietf.org>>
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

The assumption being based on one's view of what a DC is ;) Yes when an SP =
and a Cloud Provider connect an inter-AS model of some form is needed.. It =
is doubtful that it would ever be Option C as the exposes a tremendous amou=
nt of internal information.
[OZ] I would beg to disagree here. Customer traffic can be tunneled to a cu=
stomer router in the cloud that should only expose customer routes. I had a=
rgued previously in IETF that current practice of option A is not scalable.
[Jim U>] So, do you mean a CSC model where the NHs are the customer CEs, if=
 so, then that is not Classical Option C where PE LBs are exchanged as the =
NHs for the customers path/routes.
[OZ] Sorry for the confusion. My comment was not specific to the draft. I w=
as responding to your comment  "Option C as the exposes a tremendous amount=
 of internal information"

At the end of the day network architecture/design whether internal/external=
 to a provider is not mandated by the IETF or any standards body. This draf=
t seems to mix encap, interconnect etc.... If the encap "requires" a specif=
ic connectivity model than I am not sure how that exactly works.

Jim Uttaro

From: Osama Zia [mailto:osamaz@microsoft.com]
Sent: Thursday, November 19, 2015 1:51 PM
To: UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); EXT - th=
omas.morin@orange.com<mailto:thomas.morin@orange.com>; BESS
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Today many large enterprises connect to cloud providers using their existin=
g MPLS VPN networks. This would mean different AS Numbers at WAN and DC sit=
es.

Regards,
Osama

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of UTTARO, JAMES
Sent: Thursday, November 19, 2015 9:46 AM
To: Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>; John E D=
rake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Henderickx, Wim (Wim)=
 <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx@alcatel-lucent.co=
m>>; EXT - thomas.morin@orange.com<mailto:thomas.morin@orange.com> <thomas.=
morin@orange.com<mailto:thomas.morin@orange.com>>; BESS <bess@ietf.org<mail=
to:bess@ietf.org>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

A concern I have with this draft is that it pre-supposes the network archit=
ecture in terms of how DCs and WAN are connected. It assumes that DCs and W=
AN networks are in different AS domains. Why is that??

Jim Uttaro

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Haoweiguo
Sent: Tuesday, November 17, 2015 11:24 PM
To: John E Drake; Henderickx, Wim (Wim); EXT - thomas.morin@orange.com<mail=
to:thomas.morin@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc


Hi,

The problem we are trying to solve is to reduce data center GW/ASBR-d's for=
warding table size, the motivation is same as traditional MPLS VPN option-C=
. Currently, the most common practise on ASBR-d is to terminate VXLAN encap=
sulation, look up local routing table, and then perform MPLS encapsulation =
to the WAN network. ASBR-d needs to maintain all VM's MAC/IP. In Option-C m=
ethod, only transport layer information needed to be maintained at GW/ASBR-=
d, the scalability will be greatly enhanced. Traditonal Option-C is only fo=
r MPLS VPN network interworking, because VXLAN is becoming pervasive in dat=
a center,  the solution in this draft was proposed for the heterogeneous ne=
twork interworking.

The advantage of this solution is that only VXLAN encapsulation is required=
 for OVS/TOR. Unlike Wim's solution, east-west bound traffic uses VXLAN enc=
ap, while north-south bound traffic uses MPLSoGRE/UDP encap.

There are two solutions in this draft:

1. Using VXLAN tunnel destination IP for stitching at ASBR-d.

No data plane modification requirements on OVS or TOR switches, only hardwa=
re changes on ASBR-d. ASBR-d normally is router, it has capability to reali=
ze the hardware changes. It will consume many IP addresses and the IP pool =
for allocation needs to be configured on ASBR-d beforehand.

2. Using VXLAN destination UDP port for stitching at ASBR-d.

Compared with solution 1, less IP address will be consumed for allocation. =
If UDP port range is too large, we can combine with solution 1 and 2.

In this solution, both data plane modification changes are needed at OVS/TO=
R and ASBR-d. ASBR-d also has capability to realize the hardware changes. F=
or OVS, it also can realize the data plane changes. For TOR switch, it norm=
ally can't realize this function.  This solution mainly focuses on pure sof=
tware based overlay network, it has more scalability. In public cloud data =
center, software based overlay network is the majority case.



Whether using solution 1 or 2 depends on the operators real envionment.



So I think our solution has no flaws, it works fine.

Thanks,

weiguo



________________________________
From: BESS [bess-bounces@ietf.org] on behalf of John E Drake [jdrake@junipe=
r.net]
Sent: Wednesday, November 18, 2015 2:49
To: Henderickx, Wim (Wim); EXT - thomas.morin@orange.com<mailto:thomas.mori=
n@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
Hi,

I think Wim has conclusively demonstrated that this draft has fatal flaws a=
nd I don't support it.  I also agree with his suggestion that we first figu=
re out what problem we are trying to solve before solving it.

Yours Irrespectively,

John

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Tuesday, November 17, 2015 12:49 PM
To: EXT - thomas.morin@orange.com<mailto:thomas.morin@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

- Snip -

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support? For this to work =
every tenant needs a different VXLAN UDP destination port/receive port.
There might be SW elements that could do some of this, but IETF defines sol=
utions which should be implemented across the board HW/SW/etc. Even if some=
 SW switches can do this, the proposal will impose so many issues in HW/dat=
a-plane engines that I cannot be behind this solution.

To make this work generically we will have to make changes anyhow. Given th=
is, we better do it in the right way and guide the industry to a solution w=
hich does not imply those complexities. Otherwise we will stick with these =
specials forever with all consequences (bugs, etc).

- snip -

From: "thomas.morin@orange.com<mailto:thomas.morin@orange.com>" <thomas.mor=
in@orange.com<mailto:thomas.morin@orange.com>>
Organization: Orange
Date: Tuesday 17 November 2015 at 01:37
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, BESS <bess@ietf.org<mailto:bess@ietf.org>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim, WG,

2015-11-16, Henderickx, Wim (Wim):

2015-11-13, Henderickx, Wim (Wim):
Thomas, we can discuss forever and someone need to describe requirements, b=
ut the current proposal I cannot agree to for the reasons explained.

TM> Well, although discussing forever is certainly not the goal, the reason=
s for rejecting a proposal need to be thoroughly understood.
WH> my point is what is the real driver for supporting a plain VXLAN data-p=
lane here, the use cases I have seen in this txt is always where an applica=
tion behind a NVE/TOR is demanding option c, but none of the NVE/TOR elemen=
ts.


My understanding is that the applications  are contexts where overlays are =
present is when workloads (VMs or baremetal) need to be interconnected with=
 VPNs. In these contexts, there can be reasons to want Option C to reduce t=
he state on ASBRs.

In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.

WH2> can it not be all cases: TOR/vswitch/Application. I would make the sol=
ution flexible to support all of these not?

2015-11-13, Henderickx, Wim (Wim):

TM> The right trade-off to make may in fact depend on whether you prefer:
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)

WH> b depends on the use case

I don't get what you mean by "b depends on the use case".
WH> see my above comment. If the real use case is an application behind NVE=
/TOR requiring model C, than all the discussion on impact on NVE/TOR is voi=
d. As such I want to have a discussion on the real driver/requirement for o=
ption c interworking with an IP based Fabric.

Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.

WH> for me the proposal is not acceptable for the reasons explained: too mu=
ch impact on the data-planes

I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?

WH> see above. The draft right now also requires changes in existing TOR/NV=
E so for me all this discussion/debate is void.

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support?

WH> and depending on implementation you don't need to change any of the TOR=
/vswitches.

Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?

WH> any proposal on the table requires changes, so for me this is not a val=
id discussion

See above, the proposal in the draft does not necessarily need changes in v=
switches.

Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems to me as making that alternate solution y=
ou suggest harder to implement.

WH> I would disagree to this. Tell me which switch/TOR handles multiple UDP=
 ports for VXLAN ?

I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.

-Thomas



From: Thomas Morin <thomas.morin@orange.com<mailto:thomas.morin@orange.com>=
>
Organization: Orange
Date: Friday 13 November 2015 at 09:57
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim,

I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs would be operationally viable.

However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support this kind of encap,  and even software=
-based switches may not be ready to support that today).

My take is that having different options to adapt to various implementation=
s constraints we may have would have value.

(+ one question below on VXLAN...)

-Thomas


2015-11-12, Henderickx, Wim (Wim):
On VXLAN/NVGRE, do you challenge the fact that they would be used with a du=
mmy MAC address that would be replaced by the right MAC by a sender based o=
n an ARP request when needed ?

Is the above the issue you had in mind about VXLAN and NVGRE ?

WH> yes

I you don't mind me asking : why do you challenge that ?




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</head>
<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">CIL<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> UTTARO, JAMES [mailto:ju1738@a=
tt.com]
<br>
<b>Sent:</b> Thursday, November 19, 2015 11:16 AM<br>
<b>To:</b> Osama Zia &lt;osamaz@microsoft.com&gt;; UTTARO, JAMES &lt;ju1738=
@att.com&gt;; Haoweiguo &lt;haoweiguo@huawei.com&gt;; John E Drake &lt;jdra=
ke@juniper.net&gt;; Henderickx, Wim (Wim) &lt;wim.henderickx@alcatel-lucent=
.com&gt;; EXT - thomas.morin@orange.com &lt;thomas.morin@orange.com&gt;;
 BESS &lt;bess@ietf.org&gt;<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">Comments In-Line..<o:p></o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">Jim Uttaro<o:p></o:p></span></i=
></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Osama Zia [<a href=3D"mailto:osa=
maz@microsoft.com">mailto:osamaz@microsoft.com</a>]
<br>
<b>Sent:</b> Thursday, November 19, 2015 2:06 PM<br>
<b>To:</b> UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); E=
XT - <a href=3D"mailto:thomas.morin@orange.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">CIL<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> UTTARO, JAMES [<a href=3D"mail=
to:ju1738@att.com">mailto:ju1738@att.com</a>]
<br>
<b>Sent:</b> Thursday, November 19, 2015 10:56 AM<br>
<b>To:</b> Osama Zia &lt;<a href=3D"mailto:osamaz@microsoft.com">osamaz@mic=
rosoft.com</a>&gt;; UTTARO, JAMES &lt;<a href=3D"mailto:ju1738@att.com">ju1=
738@att.com</a>&gt;; Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com">=
haoweiguo@huawei.com</a>&gt;; John E Drake &lt;<a href=3D"mailto:jdrake@jun=
iper.net">jdrake@juniper.net</a>&gt;;
 Henderickx, Wim (Wim) &lt;<a href=3D"mailto:wim.henderickx@alcatel-lucent.=
com">wim.henderickx@alcatel-lucent.com</a>&gt;; EXT -
<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</a> &lt;=
<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</a>&gt;;=
 BESS &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">The assumption being based on o=
ne&#8217;s view of what a DC is ;) Yes when an SP and a Cloud Provider conn=
ect an inter-AS model of some form is needed.. It is
 doubtful that it would ever be Option C as the exposes a tremendous amount=
 of internal information.
<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><i><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">[OZ] I would beg to disagree here. Customer traf=
fic can be tunneled to a customer router in the cloud that should only expo=
se customer routes. I had argued previously in
 IETF that current practice of option A is not scalable. <o:p></o:p></span>=
</i></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">[Jim U&gt;] So, do you mean a C=
SC model where the NHs are the customer CEs, if so, then that is not Classi=
cal Option C where PE LBs are exchanged as the NHs
 for the customers path/routes.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><i><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">[OZ] Sorry for the confusion. My comment was not=
 specific to the draft. I was responding to your comment</span></i><b><i><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;co=
lor:#1F497D">
 &nbsp;&#8220;</span></i></b><b><i><span style=3D"font-size:11.0pt;font-fam=
ily:&quot;Calibri&quot;,sans-serif;color:#1F497D">Option C as the exposes a=
 tremendous amount of internal information&#8221;</span></i></b><b><i><span=
 style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color=
:#1F497D"><o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">At the end of the day network a=
rchitecture/design whether internal/external to a provider is not mandated =
by the IETF or any standards body. This draft
 seems to mix encap, interconnect etc&#8230;. If the encap &#8220;requires&=
#8221; a specific connectivity model than I am not sure how that exactly wo=
rks.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">Jim Uttaro<o:p></o:p></span></i=
></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Osama Zia [<a href=3D"mailto:osa=
maz@microsoft.com">mailto:osamaz@microsoft.com</a>]
<br>
<b>Sent:</b> Thursday, November 19, 2015 1:51 PM<br>
<b>To:</b> UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); E=
XT - <a href=3D"mailto:thomas.morin@orange.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Today many large enterprises connect =
to cloud providers using their existing MPLS VPN networks. This would mean =
different AS Numbers at WAN and DC sites.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Osama<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> BESS [<a href=3D"mailto:bess-b=
ounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>UTTARO, JAMES<br>
<b>Sent:</b> Thursday, November 19, 2015 9:46 AM<br>
<b>To:</b> Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com">haoweiguo@=
huawei.com</a>&gt;; John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">=
jdrake@juniper.net</a>&gt;; Henderickx, Wim (Wim) &lt;<a href=3D"mailto:wim=
.henderickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a>&gt;;
 EXT - <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</=
a> &lt;<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</=
a>&gt;; BESS &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">A concern I have with this draf=
t is that it pre-supposes the network architecture in terms of how DCs and =
WAN are connected. It assumes that DCs and WAN
 networks are in different AS domains. Why is that?? &nbsp;<o:p></o:p></spa=
n></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">Jim Uttaro<o:p></o:p></span></i=
></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> BESS [<a href=3D"mailto:bess-bou=
nces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Haoweiguo<br>
<b>Sent:</b> Tuesday, November 17, 2015 11:24 PM<br>
<b>To:</b> John E Drake; Henderickx, Wim (Wim); EXT - <a href=3D"mailto:tho=
mas.morin@orange.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">H=
i,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
he problem we are trying to solve is to reduce data center GW/ASBR-d's forw=
arding table size, the motivation is same as traditional MPLS VPN option-C.=
 Currently, the most common practise on ASBR-d
 is to terminate VXLAN encapsulation, look up local routing table, and then=
 perform MPLS encapsulation to the WAN network. ASBR-d needs to maintain al=
l VM's MAC/IP. In Option-C method, only transport layer information needed =
to be maintained at GW/ASBR-d, the
 scalability will be greatly enhanced. Traditonal Option-C is only for MPLS=
 VPN network interworking, because VXLAN is becoming pervasive in data cent=
er,&nbsp; the solution in this draft was proposed for the heterogeneous net=
work interworking.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
he advantage of this solution is that only VXLAN encapsulation is required =
for OVS/TOR. Unlike Wim's solution, east-west bound traffic uses VXLAN enca=
p, while north-south bound traffic uses MPLSoGRE/UDP
 encap.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
here are two solutions in this draft:<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">1=
. Using VXLAN tunnel destination IP for stitching at ASBR-d.<o:p></o:p></sp=
an></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">N=
o data plane modification requirements on OVS or TOR switches, only hardwar=
e changes on ASBR-d. ASBR-d normally is router, it has capability to realiz=
e the hardware changes. It will consume many
 IP addresses and the IP pool for allocation needs to be configured on ASBR=
-d beforehand.
<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">2=
. Using VXLAN destination UDP port for stitching at ASBR-d.<o:p></o:p></spa=
n></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">C=
ompared with solution 1, less IP address will be consumed for allocation. I=
f UDP port range is too large, we can combine with solution 1 and 2.<o:p></=
o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">I=
n this solution, both data plane modification changes are needed at OVS/TOR=
 and ASBR-d. ASBR-d also has capability to realize the hardware changes. Fo=
r OVS, it also can realize the data plane changes.
 For TOR switch,&nbsp;it normally can't realize this function.&nbsp; This s=
olution mainly focuses on pure software based overlay network, it has more =
scalability. In public cloud data center, software based overlay network is=
 the majority case.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">&=
nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">W=
hether using solution 1 or 2 depends on the operators real envionment.<o:p>=
</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">&=
nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">S=
o I think our solution has no flaws, it works fine.
<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
hanks,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">w=
eiguo<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">&=
nbsp;</span><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black"><o:p></o:p></span></p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"color:black">
<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
<div id=3D"divRpF197338">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">From:<=
/span></b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sa=
ns-serif;color:black"> BESS [bess-bounces@ietf.org] on behalf
 of John E Drake [jdrake@juniper.net]<br>
<b>Sent:</b> Wednesday, November 18, 2015 2:49<br>
<b>To:</b> Henderickx, Wim (Wim); EXT - <a href=3D"mailto:thomas.morin@oran=
ge.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Hi,</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I think Wim has conclusively demonstr=
ated that this draft has fatal flaws and I don&#8217;t support it.&nbsp; I =
also agree with his suggestion that we first figure out what
 problem we are trying to solve before solving it.</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> BESS [=
<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
<b>Sent:</b> Tuesday, November 17, 2015 12:49 PM<br>
<b>To:</b> EXT - <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@or=
ange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&#8212; Snip &#8212;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">No, the spec as it is can be implemente=
d in its VXLAN variant with existing vswitches (e.g. OVS allows to choose t=
he VXLAN destination port, ditto for the linux
 kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; and how many ports simultaneousl=
y would they support? For this to work every tenant needs a different VXLAN=
 UDP destination port/receive port.&nbsp;</span><span style=3D"color:black"=
><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">There might be SW elements that could d=
o some of this, but IETF defines solutions which should be implemented acro=
ss the board HW/SW/etc. Even if some SW switches
 can do this, the proposal will impose so many issues in HW/data-plane engi=
nes that I cannot be behind this solution.&nbsp;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">To make this work generically we will h=
ave to make changes anyhow. Given this, we better do it in the right way an=
d guide the industry to a solution which does
 not imply those complexities. Otherwise we will stick with these specials =
forever with all consequences (bugs, etc).</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">- snip -</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:=
black">&quot;<a href=3D"mailto:thomas.morin@orange.com" target=3D"_blank">t=
homas.morin@orange.com</a>&quot; &lt;<a href=3D"mailto:thomas.morin@orange.=
com" target=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Tuesday 17 November 2015 at 01:37<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;, BESS &=
lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;=
<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi Wim, WG,<br>
<br>
2015-11-16, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
2015-11-13, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thomas, we can discuss forever and some=
one need to describe requirements, but the current proposal I cannot agree =
to for the reasons explained.</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
TM&gt; Well, although discussing forever is certainly not the goal, the rea=
sons for rejecting a proposal need to be thoroughly understood.</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; my point is what is the real dri=
ver for supporting a plain VXLAN data-plane here, the use cases I have seen=
 in this txt is always where an application behind
 a NVE/TOR is demanding option c, but none of the NVE/TOR elements.</span><=
span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
My understanding is that the applications&nbsp; are contexts where overlays=
 are present is when workloads (VMs or baremetal) need to be interconnected=
 with VPNs. In these contexts, there can be reasons to want Option C to red=
uce the state on ASBRs.<br>
<br>
In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH2&gt; can it not be all cases: TOR/vs=
witch/Application. I would make the solution flexible to support all of the=
se not?</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">2015-11-13, Henderickx, Wim (Wim):</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
TM&gt; The right trade-off to make may in fact depend on whether you prefer=
:<br>
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)<br>
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; b depends on the use case
</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
I don't get what you mean by &quot;b depends on the use case&quot;. </span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; see my above comment. If the rea=
l use case is an application behind NVE/TOR requiring model C, than all the=
 discussion on impact on NVE/TOR is void. As such
 I want to have a discussion on the real driver/requirement for option c in=
terworking with an IP based Fabric.</span><span style=3D"color:black"><o:p>=
</o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><br>
Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.<br>
<br>
WH&gt; for me the proposal is not acceptable for the reasons explained: too=
 much impact on the data-planes</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.<br>
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; see above. The draft right now a=
lso requires changes in existing TOR/NVE so for me all this discussion/deba=
te is void.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; and how many ports simultaneousl=
y would they support?</span><span style=3D"color:black"><o:p></o:p></span><=
/p>
</div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; and depending on implementation =
you don&#8217;t need to change any of the TOR/vswitches.</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; any proposal on the table requir=
es changes, so for me this is not a valid discussion</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><br>
See above, the proposal in the draft does not necessarily need changes in v=
switches.</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems
 to me as making that alternate solution you suggest harder to implement.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; I would disagree to this. Tell m=
e which switch/TOR handles multiple UDP ports for VXLAN ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><br>
I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.<br>
<br>
-Thomas</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:=
black">Thomas Morin &lt;<a href=3D"mailto:thomas.morin@orange.com" target=
=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Friday 13 November 2015 at 09:57<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi Wim,<br>
<br>
I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs
 would be operationally viable.&nbsp;&nbsp; <br>
<br>
However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support
 this kind of encap,&nbsp; and even software-based switches may not be read=
y to support that today).<br>
<br>
My take is that having different options to adapt to various implementation=
s constraints we may have would have value.<br>
<br>
(&#43; one question below on VXLAN...)<br>
<br>
-Thomas<br>
<br>
<br>
2015-11-12, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">On VXLAN=
/NVGRE, do you challenge the fact that they would be used with a dummy MAC =
address that would be replaced by the right MAC
 by a sender based on an ARP request when needed ?</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
Is the above the issue you had in mind about VXLAN and NVGRE ?</span><span =
style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">WH&gt; yes</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><br>
I you don't mind me asking : why do you challenge that ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<pre><span style=3D"color:black">__________________________________________=
___________________________________________________________________________=
____<o:p></o:p></span></pre>
<pre><span style=3D"color:black">&nbsp;<o:p></o:p></span></pre>
<pre><span style=3D"color:black">Ce message et ses pieces jointes peuvent c=
ontenir des informations confidentielles ou privilegiees et ne doivent donc=
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<pre><span style=3D"color:black">pas etre diffuses, exploites ou copies san=
s autorisation. Si vous avez recu ce message par erreur, veuillez le signal=
er<o:p></o:p></span></pre>
<pre><span style=3D"color:black">a l'expediteur et le detruire ainsi que le=
s pieces jointes. Les messages electroniques etant susceptibles d'alteratio=
n,<o:p></o:p></span></pre>
<pre><span style=3D"color:black">France Telecom - Orange decline toute resp=
onsabilite si ce message a ete altere, deforme ou falsifie. Merci<o:p></o:p=
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<pre><span style=3D"color:black">Thank you.<o:p></o:p></span></pre>
</div>
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From: "UTTARO, JAMES" <ju1738@att.com>
To: Osama Zia <osamaz@microsoft.com>, "UTTARO, JAMES" <ju1738@att.com>, Haoweiguo <haoweiguo@huawei.com>, John E Drake <jdrake@juniper.net>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, BESS <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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IMO an Option C model not CSC between to different administrative authoriti=
es where internal reachability state is exchanged is a non-starter.  But co=
ming back to this draft it seems that tying the encap and the network archi=
tecture is a requirement or am I getting that wrong. If not, how should I i=
nterpret this draft? Should it be if I do Option C as I must have different=
 AS domains between my internal DCs and WAN and my encap models are differe=
nt in the WAN and DC, and I am using specific encaps in different places et=
cc... it would be in my solution space??

Jim Uttaro

From: Osama Zia [mailto:osamaz@microsoft.com]
Sent: Thursday, November 19, 2015 2:38 PM
To: UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); EXT - th=
omas.morin@orange.com; BESS
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

CIL

From: UTTARO, JAMES [mailto:ju1738@att.com]
Sent: Thursday, November 19, 2015 11:16 AM
To: Osama Zia <osamaz@microsoft.com<mailto:osamaz@microsoft.com>>; UTTARO, =
JAMES <ju1738@att.com<mailto:ju1738@att.com>>; Haoweiguo <haoweiguo@huawei.=
com<mailto:haoweiguo@huawei.com>>; John E Drake <jdrake@juniper.net<mailto:=
jdrake@juniper.net>>; Henderickx, Wim (Wim) <wim.henderickx@alcatel-lucent.=
com<mailto:wim.henderickx@alcatel-lucent.com>>; EXT - thomas.morin@orange.c=
om<mailto:thomas.morin@orange.com> <thomas.morin@orange.com<mailto:thomas.m=
orin@orange.com>>; BESS <bess@ietf.org<mailto:bess@ietf.org>>
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Comments In-Line..

Jim Uttaro

From: Osama Zia [mailto:osamaz@microsoft.com]
Sent: Thursday, November 19, 2015 2:06 PM
To: UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); EXT - th=
omas.morin@orange.com<mailto:thomas.morin@orange.com>; BESS
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

CIL

From: UTTARO, JAMES [mailto:ju1738@att.com]
Sent: Thursday, November 19, 2015 10:56 AM
To: Osama Zia <osamaz@microsoft.com<mailto:osamaz@microsoft.com>>; UTTARO, =
JAMES <ju1738@att.com<mailto:ju1738@att.com>>; Haoweiguo <haoweiguo@huawei.=
com<mailto:haoweiguo@huawei.com>>; John E Drake <jdrake@juniper.net<mailto:=
jdrake@juniper.net>>; Henderickx, Wim (Wim) <wim.henderickx@alcatel-lucent.=
com<mailto:wim.henderickx@alcatel-lucent.com>>; EXT - thomas.morin@orange.c=
om<mailto:thomas.morin@orange.com> <thomas.morin@orange.com<mailto:thomas.m=
orin@orange.com>>; BESS <bess@ietf.org<mailto:bess@ietf.org>>
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

The assumption being based on one's view of what a DC is ;) Yes when an SP =
and a Cloud Provider connect an inter-AS model of some form is needed.. It =
is doubtful that it would ever be Option C as the exposes a tremendous amou=
nt of internal information.
[OZ] I would beg to disagree here. Customer traffic can be tunneled to a cu=
stomer router in the cloud that should only expose customer routes. I had a=
rgued previously in IETF that current practice of option A is not scalable.
[Jim U>] So, do you mean a CSC model where the NHs are the customer CEs, if=
 so, then that is not Classical Option C where PE LBs are exchanged as the =
NHs for the customers path/routes.
[OZ] Sorry for the confusion. My comment was not specific to the draft. I w=
as responding to your comment  "Option C as the exposes a tremendous amount=
 of internal information"

At the end of the day network architecture/design whether internal/external=
 to a provider is not mandated by the IETF or any standards body. This draf=
t seems to mix encap, interconnect etc.... If the encap "requires" a specif=
ic connectivity model than I am not sure how that exactly works.

Jim Uttaro

From: Osama Zia [mailto:osamaz@microsoft.com]
Sent: Thursday, November 19, 2015 1:51 PM
To: UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); EXT - th=
omas.morin@orange.com<mailto:thomas.morin@orange.com>; BESS
Subject: RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Today many large enterprises connect to cloud providers using their existin=
g MPLS VPN networks. This would mean different AS Numbers at WAN and DC sit=
es.

Regards,
Osama

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of UTTARO, JAMES
Sent: Thursday, November 19, 2015 9:46 AM
To: Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>; John E D=
rake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Henderickx, Wim (Wim)=
 <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx@alcatel-lucent.co=
m>>; EXT - thomas.morin@orange.com<mailto:thomas.morin@orange.com> <thomas.=
morin@orange.com<mailto:thomas.morin@orange.com>>; BESS <bess@ietf.org<mail=
to:bess@ietf.org>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

A concern I have with this draft is that it pre-supposes the network archit=
ecture in terms of how DCs and WAN are connected. It assumes that DCs and W=
AN networks are in different AS domains. Why is that??

Jim Uttaro

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Haoweiguo
Sent: Tuesday, November 17, 2015 11:24 PM
To: John E Drake; Henderickx, Wim (Wim); EXT - thomas.morin@orange.com<mail=
to:thomas.morin@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc


Hi,

The problem we are trying to solve is to reduce data center GW/ASBR-d's for=
warding table size, the motivation is same as traditional MPLS VPN option-C=
. Currently, the most common practise on ASBR-d is to terminate VXLAN encap=
sulation, look up local routing table, and then perform MPLS encapsulation =
to the WAN network. ASBR-d needs to maintain all VM's MAC/IP. In Option-C m=
ethod, only transport layer information needed to be maintained at GW/ASBR-=
d, the scalability will be greatly enhanced. Traditonal Option-C is only fo=
r MPLS VPN network interworking, because VXLAN is becoming pervasive in dat=
a center,  the solution in this draft was proposed for the heterogeneous ne=
twork interworking.

The advantage of this solution is that only VXLAN encapsulation is required=
 for OVS/TOR. Unlike Wim's solution, east-west bound traffic uses VXLAN enc=
ap, while north-south bound traffic uses MPLSoGRE/UDP encap.

There are two solutions in this draft:

1. Using VXLAN tunnel destination IP for stitching at ASBR-d.

No data plane modification requirements on OVS or TOR switches, only hardwa=
re changes on ASBR-d. ASBR-d normally is router, it has capability to reali=
ze the hardware changes. It will consume many IP addresses and the IP pool =
for allocation needs to be configured on ASBR-d beforehand.

2. Using VXLAN destination UDP port for stitching at ASBR-d.

Compared with solution 1, less IP address will be consumed for allocation. =
If UDP port range is too large, we can combine with solution 1 and 2.

In this solution, both data plane modification changes are needed at OVS/TO=
R and ASBR-d. ASBR-d also has capability to realize the hardware changes. F=
or OVS, it also can realize the data plane changes. For TOR switch, it norm=
ally can't realize this function.  This solution mainly focuses on pure sof=
tware based overlay network, it has more scalability. In public cloud data =
center, software based overlay network is the majority case.



Whether using solution 1 or 2 depends on the operators real envionment.



So I think our solution has no flaws, it works fine.

Thanks,

weiguo



________________________________
From: BESS [bess-bounces@ietf.org] on behalf of John E Drake [jdrake@junipe=
r.net]
Sent: Wednesday, November 18, 2015 2:49
To: Henderickx, Wim (Wim); EXT - thomas.morin@orange.com<mailto:thomas.mori=
n@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
Hi,

I think Wim has conclusively demonstrated that this draft has fatal flaws a=
nd I don't support it.  I also agree with his suggestion that we first figu=
re out what problem we are trying to solve before solving it.

Yours Irrespectively,

John

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Henderickx, Wim (Wim=
)
Sent: Tuesday, November 17, 2015 12:49 PM
To: EXT - thomas.morin@orange.com<mailto:thomas.morin@orange.com>; BESS
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

- Snip -

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support? For this to work =
every tenant needs a different VXLAN UDP destination port/receive port.
There might be SW elements that could do some of this, but IETF defines sol=
utions which should be implemented across the board HW/SW/etc. Even if some=
 SW switches can do this, the proposal will impose so many issues in HW/dat=
a-plane engines that I cannot be behind this solution.

To make this work generically we will have to make changes anyhow. Given th=
is, we better do it in the right way and guide the industry to a solution w=
hich does not imply those complexities. Otherwise we will stick with these =
specials forever with all consequences (bugs, etc).

- snip -

From: "thomas.morin@orange.com<mailto:thomas.morin@orange.com>" <thomas.mor=
in@orange.com<mailto:thomas.morin@orange.com>>
Organization: Orange
Date: Tuesday 17 November 2015 at 01:37
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>, BESS <bess@ietf.org<mailto:bess@ietf.org>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim, WG,

2015-11-16, Henderickx, Wim (Wim):

2015-11-13, Henderickx, Wim (Wim):
Thomas, we can discuss forever and someone need to describe requirements, b=
ut the current proposal I cannot agree to for the reasons explained.

TM> Well, although discussing forever is certainly not the goal, the reason=
s for rejecting a proposal need to be thoroughly understood.
WH> my point is what is the real driver for supporting a plain VXLAN data-p=
lane here, the use cases I have seen in this txt is always where an applica=
tion behind a NVE/TOR is demanding option c, but none of the NVE/TOR elemen=
ts.


My understanding is that the applications  are contexts where overlays are =
present is when workloads (VMs or baremetal) need to be interconnected with=
 VPNs. In these contexts, there can be reasons to want Option C to reduce t=
he state on ASBRs.

In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.

WH2> can it not be all cases: TOR/vswitch/Application. I would make the sol=
ution flexible to support all of these not?

2015-11-13, Henderickx, Wim (Wim):

TM> The right trade-off to make may in fact depend on whether you prefer:
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)

WH> b depends on the use case

I don't get what you mean by "b depends on the use case".
WH> see my above comment. If the real use case is an application behind NVE=
/TOR requiring model C, than all the discussion on impact on NVE/TOR is voi=
d. As such I want to have a discussion on the real driver/requirement for o=
ption c interworking with an IP based Fabric.

Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.

WH> for me the proposal is not acceptable for the reasons explained: too mu=
ch impact on the data-planes

I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?

WH> see above. The draft right now also requires changes in existing TOR/NV=
E so for me all this discussion/debate is void.

No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).

(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)

WH> and how many ports simultaneously would they support?

WH> and depending on implementation you don't need to change any of the TOR=
/vswitches.

Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?

WH> any proposal on the table requires changes, so for me this is not a val=
id discussion

See above, the proposal in the draft does not necessarily need changes in v=
switches.

Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems to me as making that alternate solution y=
ou suggest harder to implement.

WH> I would disagree to this. Tell me which switch/TOR handles multiple UDP=
 ports for VXLAN ?

I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.

-Thomas



From: Thomas Morin <thomas.morin@orange.com<mailto:thomas.morin@orange.com>=
>
Organization: Orange
Date: Friday 13 November 2015 at 09:57
To: Wim Henderickx <wim.henderickx@alcatel-lucent.com<mailto:wim.henderickx=
@alcatel-lucent.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc

Hi Wim,

I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs would be operationally viable.

However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support this kind of encap,  and even software=
-based switches may not be ready to support that today).

My take is that having different options to adapt to various implementation=
s constraints we may have would have value.

(+ one question below on VXLAN...)

-Thomas


2015-11-12, Henderickx, Wim (Wim):
On VXLAN/NVGRE, do you challenge the fact that they would be used with a du=
mmy MAC address that would be replaced by the right MAC by a sender based o=
n an ARP request when needed ?

Is the above the issue you had in mind about VXLAN and NVGRE ?

WH> yes

I you don't mind me asking : why do you challenge that ?




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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">IMO an Option C mod=
el not CSC between to different administrative authorities where internal r=
eachability state is exchanged is a non-starter. &nbsp;But coming
 back to this draft it seems that tying the encap and the network architect=
ure is a requirement or am I getting that wrong. If not, how should I inter=
pret this draft? Should it be if I do Option C as I must have different AS =
domains between my internal DCs
 and WAN and my encap models are different in the WAN and DC, and I am usin=
g specific encaps in different places etcc&#8230; it would be in my solutio=
n space??<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Jim Uttaro<o:p></o:=
p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Osama Zi=
a [mailto:osamaz@microsoft.com]
<br>
<b>Sent:</b> Thursday, November 19, 2015 2:38 PM<br>
<b>To:</b> UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); E=
XT - thomas.morin@orange.com; BESS<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">CIL<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> UTTARO=
, JAMES [<a href=3D"mailto:ju1738@att.com">mailto:ju1738@att.com</a>]
<br>
<b>Sent:</b> Thursday, November 19, 2015 11:16 AM<br>
<b>To:</b> Osama Zia &lt;<a href=3D"mailto:osamaz@microsoft.com">osamaz@mic=
rosoft.com</a>&gt;; UTTARO, JAMES &lt;<a href=3D"mailto:ju1738@att.com">ju1=
738@att.com</a>&gt;; Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com">=
haoweiguo@huawei.com</a>&gt;; John E Drake &lt;<a href=3D"mailto:jdrake@jun=
iper.net">jdrake@juniper.net</a>&gt;;
 Henderickx, Wim (Wim) &lt;<a href=3D"mailto:wim.henderickx@alcatel-lucent.=
com">wim.henderickx@alcatel-lucent.com</a>&gt;; EXT -
<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</a> &lt;=
<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</a>&gt;;=
 BESS &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Comments In-Line..<=
o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Jim Uttaro<o:p></o:=
p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Osama Zi=
a [<a href=3D"mailto:osamaz@microsoft.com">mailto:osamaz@microsoft.com</a>]
<br>
<b>Sent:</b> Thursday, November 19, 2015 2:06 PM<br>
<b>To:</b> UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); E=
XT - <a href=3D"mailto:thomas.morin@orange.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">CIL<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> UTTARO=
, JAMES [<a href=3D"mailto:ju1738@att.com">mailto:ju1738@att.com</a>]
<br>
<b>Sent:</b> Thursday, November 19, 2015 10:56 AM<br>
<b>To:</b> Osama Zia &lt;<a href=3D"mailto:osamaz@microsoft.com">osamaz@mic=
rosoft.com</a>&gt;; UTTARO, JAMES &lt;<a href=3D"mailto:ju1738@att.com">ju1=
738@att.com</a>&gt;; Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com">=
haoweiguo@huawei.com</a>&gt;; John E Drake &lt;<a href=3D"mailto:jdrake@jun=
iper.net">jdrake@juniper.net</a>&gt;;
 Henderickx, Wim (Wim) &lt;<a href=3D"mailto:wim.henderickx@alcatel-lucent.=
com">wim.henderickx@alcatel-lucent.com</a>&gt;; EXT -
<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</a> &lt;=
<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</a>&gt;;=
 BESS &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">The assumption bein=
g based on one&#8217;s view of what a DC is ;) Yes when an SP and a Cloud P=
rovider connect an inter-AS model of some form is needed.. It
 is doubtful that it would ever be Option C as the exposes a tremendous amo=
unt of internal information.
<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><i><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">[OZ] I would beg to disagree here. C=
ustomer traffic can be tunneled to a customer router in the cloud that shou=
ld only expose customer routes. I had argued previously
 in IETF that current practice of option A is not scalable. <o:p></o:p></sp=
an></i></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">[Jim U&gt;] So, do =
you mean a CSC model where the NHs are the customer CEs, if so, then that i=
s not Classical Option C where PE LBs are exchanged as the
 NHs for the customers path/routes.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><i><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">[OZ] Sorry for the confusion. My com=
ment was not specific to the draft. I was responding to your comment<b><spa=
n style=3D"color:#1F497D"> &nbsp;&#8220;Option C as the exposes a tremendou=
s
 amount of internal information&#8221;<o:p></o:p></span></b></span></i></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">At the end of the d=
ay network architecture/design whether internal/external to a provider is n=
ot mandated by the IETF or any standards body. This draft
 seems to mix encap, interconnect etc&#8230;. If the encap &#8220;requires&=
#8221; a specific connectivity model than I am not sure how that exactly wo=
rks.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Jim Uttaro<o:p></o:=
p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Osama Zi=
a [<a href=3D"mailto:osamaz@microsoft.com">mailto:osamaz@microsoft.com</a>]
<br>
<b>Sent:</b> Thursday, November 19, 2015 1:51 PM<br>
<b>To:</b> UTTARO, JAMES; Haoweiguo; John E Drake; Henderickx, Wim (Wim); E=
XT - <a href=3D"mailto:thomas.morin@orange.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> RE: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Today many large enterpri=
ses connect to cloud providers using their existing MPLS VPN networks. This=
 would mean different AS Numbers at WAN and DC sites.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Regards,<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Osama<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> BESS [=
<a href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>UTTARO, JAMES<br>
<b>Sent:</b> Thursday, November 19, 2015 9:46 AM<br>
<b>To:</b> Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com">haoweiguo@=
huawei.com</a>&gt;; John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">=
jdrake@juniper.net</a>&gt;; Henderickx, Wim (Wim) &lt;<a href=3D"mailto:wim=
.henderickx@alcatel-lucent.com">wim.henderickx@alcatel-lucent.com</a>&gt;;
 EXT - <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</=
a> &lt;<a href=3D"mailto:thomas.morin@orange.com">thomas.morin@orange.com</=
a>&gt;; BESS &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">A concern I have wi=
th this draft is that it pre-supposes the network architecture in terms of =
how DCs and WAN are connected. It assumes that DCs and WAN
 networks are in different AS domains. Why is that?? &nbsp;<o:p></o:p></spa=
n></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Jim Uttaro<o:p></o:=
p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> BESS [<a=
 href=3D"mailto:bess-bounces@ietf.org">mailto:bess-bounces@ietf.org</a>]
<b>On Behalf Of </b>Haoweiguo<br>
<b>Sent:</b> Tuesday, November 17, 2015 11:24 PM<br>
<b>To:</b> John E Drake; Henderickx, Wim (Wim); EXT - <a href=3D"mailto:tho=
mas.morin@orange.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Hi,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">The problem we are trying to solve is to reduce data center GW/A=
SBR-d's forwarding table size, the motivation is same as traditional MPLS V=
PN option-C. Currently, the most common practise on ASBR-d
 is to terminate VXLAN encapsulation, look up local routing table, and then=
 perform MPLS encapsulation to the WAN network. ASBR-d needs to maintain al=
l VM's MAC/IP. In Option-C method, only transport layer information needed =
to be maintained at GW/ASBR-d, the
 scalability will be greatly enhanced. Traditonal Option-C is only for MPLS=
 VPN network interworking, because VXLAN is becoming pervasive in data cent=
er,&nbsp; the solution in this draft was proposed for the heterogeneous net=
work interworking.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">The advantage of this solution is that only VXLAN encapsulation =
is required for OVS/TOR. Unlike Wim's solution, east-west bound traffic use=
s VXLAN encap, while north-south bound traffic uses MPLSoGRE/UDP
 encap.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">There are two solutions in this draft:<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">1. Using VXLAN tunnel destination IP for stitching at ASBR-d.<o:=
p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">No data plane modification requirements on OVS or TOR switches, =
only hardware changes on ASBR-d. ASBR-d normally is router, it has capabili=
ty to realize the hardware changes. It will consume many
 IP addresses and the IP pool for allocation needs to be configured on ASBR=
-d beforehand.
<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">2. Using VXLAN destination UDP port for stitching at ASBR-d.<o:p=
></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Compared with solution 1, less IP address will be consumed for a=
llocation. If UDP port range is too large, we can combine with solution 1 a=
nd 2.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">In this solution, both data plane modification changes are neede=
d at OVS/TOR and ASBR-d. ASBR-d also has capability to realize the hardware=
 changes. For OVS, it also can realize the data plane
 changes. For TOR switch,&nbsp;it normally can't realize this function.&nbs=
p; This solution mainly focuses on pure software based overlay network, it =
has more scalability. In public cloud data center, software based overlay n=
etwork is the majority case.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">&nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Whether using solution 1 or 2 depends on the operators real envi=
onment.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">&nbsp;<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">So I think our solution has no flaws, it works fine.
<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">Thanks,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">weiguo<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;co=
lor:black">&nbsp;</span><span style=3D"font-size:10.0pt;font-family:&quot;T=
ahoma&quot;,&quot;sans-serif&quot;;color:black"><o:p></o:p></span></p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"color:black">
<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
<div id=3D"divRpF197338">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><b><span style=3D"fon=
t-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:b=
lack">From:</span></b><span style=3D"font-size:10.0pt;font-family:&quot;Tah=
oma&quot;,&quot;sans-serif&quot;;color:black"> BESS [bess-bounces@ietf.org]=
 on behalf
 of John E Drake [jdrake@juniper.net]<br>
<b>Sent:</b> Wednesday, November 18, 2015 2:49<br>
<b>To:</b> Henderickx, Wim (Wim); EXT - <a href=3D"mailto:thomas.morin@oran=
ge.com">
thomas.morin@orange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Hi,</span><span style=3D"=
color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">I think Wim has conclusiv=
ely demonstrated that this draft has fatal flaws and I don&#8217;t support =
it.&nbsp; I also agree with his suggestion that we first figure out
 what problem we are trying to solve before solving it.</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> BESS [<a href=3D"mailto:bess-bounces@ietf.org">mailto:bes=
s-bounces@ietf.org</a>]
<b>On Behalf Of </b>Henderickx, Wim (Wim)<br>
<b>Sent:</b> Tuesday, November 17, 2015 12:49 PM<br>
<b>To:</b> EXT - <a href=3D"mailto:thomas.morin@orange.com">thomas.morin@or=
ange.com</a>; BESS<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&#8212; Snip &#8212;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">No, the spec as it is can b=
e implemented in its VXLAN variant with existing vswitches (e.g. OVS allows=
 to choose the VXLAN destination port, ditto for the linux
 kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; and how many ports s=
imultaneously would they support? For this to work every tenant needs a dif=
ferent VXLAN UDP destination port/receive port.&nbsp;</span><span style=3D"=
color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">There might be SW elements =
that could do some of this, but IETF defines solutions which should be impl=
emented across the board HW/SW/etc. Even if some SW switches
 can do this, the proposal will impose so many issues in HW/data-plane engi=
nes that I cannot be behind this solution.&nbsp;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">To make this work generical=
ly we will have to make changes anyhow. Given this, we better do it in the =
right way and guide the industry to a solution which does
 not imply those complexities. Otherwise we will stick with these specials =
forever with all consequences (bugs, etc).</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">- snip -</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&=
quot;;color:black">&quot;<a href=3D"mailto:thomas.morin@orange.com" target=
=3D"_blank">thomas.morin@orange.com</a>&quot; &lt;<a href=3D"mailto:thomas.=
morin@orange.com" target=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Tuesday 17 November 2015 at 01:37<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;, BESS &=
lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;=
<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi Wim, WG,<br>
<br>
2015-11-16, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
2015-11-13, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thomas, we can discuss fore=
ver and someone need to describe requirements, but the current proposal I c=
annot agree to for the reasons explained.</span><span style=3D"color:black"=
><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
TM&gt; Well, although discussing forever is certainly not the goal, the rea=
sons for rejecting a proposal need to be thoroughly understood.</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; my point is what is =
the real driver for supporting a plain VXLAN data-plane here, the use cases=
 I have seen in this txt is always where an application behind
 a NVE/TOR is demanding option c, but none of the NVE/TOR elements.</span><=
span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
My understanding is that the applications&nbsp; are contexts where overlays=
 are present is when workloads (VMs or baremetal) need to be interconnected=
 with VPNs. In these contexts, there can be reasons to want Option C to red=
uce the state on ASBRs.<br>
<br>
In these context, its not the workload (VM or baremetal) that would typical=
ly handle VRFs, but really the vswitch or ToR.</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH2&gt; can it not be all c=
ases: TOR/vswitch/Application. I would make the solution flexible to suppor=
t all of these not?</span><span style=3D"color:black"><o:p></o:p></span></p=
>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">2015-11-13, Henderickx, Wim=
 (Wim):</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
TM&gt; The right trade-off to make may in fact depend on whether you prefer=
:<br>
(a) a new dataplane stitching behavior on DC ASBRs (the behavior specified =
in this draft)<br>
or (b) an evolution of the encaps on the vswitches and ToRs to support MPLS=
/MPLS/(UDP or GRE)</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; b depends on the use=
 case
</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
I don't get what you mean by &quot;b depends on the use case&quot;. </span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; see my above comment=
. If the real use case is an application behind NVE/TOR requiring model C, =
than all the discussion on impact on NVE/TOR is void. As such
 I want to have a discussion on the real driver/requirement for option c in=
terworking with an IP based Fabric.</span><span style=3D"color:black"><o:p>=
</o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
Although I can agree than detailing requirements can always help, I don't t=
hink one can assume a certain application to dismiss the proposal.<br>
<br>
WH&gt; for me the proposal is not acceptable for the reasons explained: too=
 much impact on the data-planes</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
I wrote the above based on the idea that the encap used in MPLS/MPLS/(UDP o=
r GRE), which hence has to be supported on the ToRs and vswitches.<br>
Another possibility would be service-label/middle-label/Ethernet assuming a=
n L2 adjacency between vswitches/ToRs and ASBRs, but this certainly does no=
t match your typical DC architecture. Or perhaps had you something else in =
mind ?</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; see above. The draft=
 right now also requires changes in existing TOR/NVE so for me all this dis=
cussion/debate is void.</span><span style=3D"color:black"><o:p></o:p></span=
></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
No, the spec as it is can be implemented in its VXLAN variant with existing=
 vswitches (e.g. OVS allows to choose the VXLAN destination port, ditto for=
 the linux kernel stack).<br>
<br>
(ToR is certainly another story, most of them not having a flexible enough =
VXLAN dataplane nor support for any MPLS-over-IP.)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; and how many ports s=
imultaneously would they support?</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; and depending on imp=
lementation you don&#8217;t need to change any of the TOR/vswitches.</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
Does this mean that for some implementations you may not need to change any=
 of the TOR/vswitches, but that for some others you may ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; any proposal on the =
table requires changes, so for me this is not a valid discussion</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
See above, the proposal in the draft does not necessarily need changes in v=
switches.</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
Let me take a practical example : while I can quite easily see how to imple=
ment the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on curre=
nt vswitch implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE) suppo=
rt in commonplace vswitches seems
 to me as making that alternate solution you suggest harder to implement.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; I would disagree to =
this. Tell me which switch/TOR handles multiple UDP ports for VXLAN ?</span=
><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
I mentioned _v_switches, and many do support a variable destination port fo=
r VXLAN, which is sufficient to implement what the draft proposes.<br>
<br>
-Thomas</span><span style=3D"color:black"><o:p></o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"color:=
black"><o:p>&nbsp;</o:p></span></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-family:&quot;Calibri&quot;,&quot;sans-serif&=
quot;;color:black">Thomas Morin &lt;<a href=3D"mailto:thomas.morin@orange.c=
om" target=3D"_blank">thomas.morin@orange.com</a>&gt;<br>
<b>Organization: </b>Orange<br>
<b>Date: </b>Friday 13 November 2015 at 09:57<br>
<b>To: </b>Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-luce=
nt.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bes=
s@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi Wim,<br>
<br>
I agree on the analysis that this proposal is restricted to implementations=
 that supports the chosen encap with non-IANA ports (which may be hard to a=
chieve for instance on hardware implementations, as you suggest), or to con=
text where managing multiple IPs
 would be operationally viable.&nbsp;&nbsp; <br>
<br>
However, it does not seem obvious to me how the alternative you propose [re=
lying on 3-label option C with an MPLS/MPLS/(UDP|GRE) encap] addresses the =
issue of whether the encap behavior is supported or not (e.g. your typical =
ToR chipset possibly may not support
 this kind of encap,&nbsp; and even software-based switches may not be read=
y to support that today).<br>
<br>
My take is that having different options to adapt to various implementation=
s constraints we may have would have value.<br>
<br>
(&#43; one question below on VXLAN...)<br>
<br>
-Thomas<br>
<br>
<br>
2015-11-12, Henderickx, Wim (Wim):</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck">On VXLAN/NVGRE, do you challenge the fact that they would be used with =
a dummy MAC address that would be replaced by the right MAC
 by a sender based on an ARP request when needed ?</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><br>
Is the above the issue you had in mind about VXLAN and NVGRE ?</span><span =
style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">WH&gt; yes</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck"><br>
I you don't mind me asking : why do you challenge that ?</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<pre><span style=3D"color:black">__________________________________________=
___________________________________________________________________________=
____<o:p></o:p></span></pre>
<pre><span style=3D"color:black">&nbsp;<o:p></o:p></span></pre>
<pre><span style=3D"color:black">Ce message et ses pieces jointes peuvent c=
ontenir des informations confidentielles ou privilegiees et ne doivent donc=
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s autorisation. Si vous avez recu ce message par erreur, veuillez le signal=
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<pre><span style=3D"color:black">a l'expediteur et le detruire ainsi que le=
s pieces jointes. Les messages electroniques etant susceptibles d'alteratio=
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From: Haoweiguo <haoweiguo@huawei.com>
To: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, Thomas Morin <thomas.morin@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Date: Fri, 20 Nov 2015 06:37:35 +0000
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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From: Haoweiguo <haoweiguo@huawei.com>
To: Diego Garcia del Rio <diego@nuagenetworks.net>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Date: Fri, 20 Nov 2015 08:59:33 +0000
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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<p><font size=3D"3" face=3D"Calibri">Hi Diego,</font></p>
<p><font size=3D"3" face=3D"Calibri">Thanks for your comments. Pls see inli=
ne with&nbsp; [weiguo3].</font></p>
<p><font size=3D"3" face=3D"Calibri">Thanks,</font></p>
<p><font size=3D"3" face=3D"Calibri">weiguo</font></p>
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<div style=3D"DIRECTION: ltr" id=3D"divRpF621108"><font color=3D"#000000" s=
ize=3D"2" face=3D"Tahoma"><b>From:</b> BESS [bess-bounces@ietf.org] on beha=
lf of Diego Garcia del Rio [diego@nuagenetworks.net]<br>
<b>Sent:</b> Friday, November 20, 2015 2:00<br>
<b>To:</b> Henderickx, Wim (Wim)<br>
<b>Cc:</b> Thomas Morin; bess@ietf.org<br>
<b>Subject:</b> Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br>
</font><br>
</div>
<div></div>
<div>
<div dir=3D"ltr">Hi Weiguo,
<div><br>
</div>
<div>If we're really talking about a public cloud operator where MOST of th=
e endpoints would be software, interconnecting DC and WAN environments seem=
s pretty blunt to be honest. You're going to be leaking every single /32 IP=
 address of the virtual machines
 into the wide area and most carriers tend to avoid that kind of thing sinc=
e its quite disrutptive in terms of scalability.</div>
<div>[weiguo3]: I just give an example for pure software based overlay netw=
ork, i don't mean the option-c solution should be used in public cloud envi=
onment or public cloud is the focus of the option-C. My meaning is that in =
pure software envionment, currently
 OVS can be modified for the UDP-port-variant VXLAN encapsulation. For hard=
ware TOR, it relies on next generation chipset.</div>
<div><br>
&nbsp;</div>
<div>Furthermore, wim's proposal does NOT imply changes on the east-west tr=
affic patterns. Those would remain on vxlan or whatever new encapsulation w=
e manage to come up with at NVO3.</div>
<div>[weiguo3]: Yes, i understood wim's proposal that is east-west bound en=
cap uses VXLAN and north-south bound encap uses MPLSoGRE. However, some DC =
operators don't use this pattern, they use VXLAN encapsulation for both nor=
th-south bound and east-west bound
 traffic.</div>
<div><br>
&nbsp;</div>
<div>Model C interconnect presuposes a high trust relationship between both=
 parties, and if the cloud and WAN are operated by the same company, that i=
s valid.</div>
<div>[weiguo3]: Yes, i agree.<br>
</div>
<div>Finally, as wim also mentions, the issue of the globally allocated VNI=
Ds is quite an issue. This affects the existing TORs since now all the WAN =
PEs would have to organize themselves not to ever allocate overlapping labe=
ls (then converted to VNIDs) since
 the DC gear today cannot handle using the same VNID on different &quot;ser=
vices&quot;.&nbsp;</div>
<div>[weiguo3]: In data center, normally globally unique VN ID mechanism is=
 used for management simplicity. In the option-c solution, similarly, MPLS =
VPN Label and VN ID also is recommended to be globally managed through SDN =
solution.</div>
<div><br>
</div>
<div>Again, you dismiss the top of racks, but I don't think we can propose =
a standard that just simply ignores a good chunk of the DC space.</div>
<div>[weiguo3]: Currently if the UDP-port-variant VXLAN encap solution is d=
eployed, the top of racks need to be dismissed, the hardware capability sta=
tus quo on the TOR switch&nbsp;&nbsp;is limited. In the future, if there ar=
e some chipsets support the encapsulation,
 it can also be used on TORs. In summay, TOR dismissing is only for current=
 deployment, that's not for the future.</div>
<div><br>
</div>
<div>And at the same time, all the DC edge routers where we propose to impl=
ement these complex mapping have larger and larger scaling tables with rout=
e capacities in the order of millions of prefixes these days. And while mod=
el A has the burden of provisioning
 the DC edge with the VRF instance, the fact it can do prefix lookups means=
 it doesnt need to leak every single /32 to the wide area and instead expos=
e the aggregates.</div>
<div>[weiguo3]: This is the common issue for Option-C. Just as you said, it=
 is very suitable for a high trustworthy and security envionment, such as c=
loud data center and WAN PE belongs to same company.</div>
<div><br>
&nbsp;</div>
<div>Best Regards,</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
<div class=3D"gmail_extra"><br>
<div class=3D"gmail_quote">On Thu, Nov 19, 2015 at 7:02 AM, Henderickx, Wim=
 (Wim) <span dir=3D"ltr">
&lt;<a href=3D"mailto:wim.henderickx@alcatel-lucent.com" target=3D"_blank">=
wim.henderickx@alcatel-lucent.com</a>&gt;</span> wrote:<br>
<blockquote style=3D"BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex=
; PADDING-LEFT: 1ex" class=3D"gmail_quote">
Thomas, thx for the time summarising this and great summary.<br>
<span><br>
<br>
<br>
<br>
On 19/11/15 02:52, &quot;BESS on behalf of Thomas Morin&quot; &lt;<a href=
=3D"mailto:bess-bounces@ietf.org" target=3D"_blank">bess-bounces@ietf.org</=
a> on behalf of
<a href=3D"mailto:thomas.morin@orange.com" target=3D"_blank">thomas.morin@o=
range.com</a>&gt; wrote:<br>
<br>
&gt;I don't believe the discussion can be usefully summarized in terms of<b=
r>
&gt;&quot;fatal flaws&quot;.<br>
&gt;Let me try to summarize my understanding of the thing discussed in this=
<br>
&gt;thread.<br>
&gt;<br>
&gt;The solution in the draft has an impact on ASBR hardware due to the new=
<br>
&gt;kind of stitching required (as well summarized by Diego). Whether this<=
br>
&gt;is a big issue or not depends on the vendor. The solution in the draft,=
<br>
&gt;for the NVE part, would be implementable in software quite easily. But,=
<br>
&gt;because of the limitations in the widespread ToR chipsets for VXLAN (an=
d<br>
&gt;their lack of support for MPLS/(GRE or UDP)), its multiple-UDP-port<br>
&gt;variant would be harder to implement in ToRs or at least not without a<=
br>
&gt;performance hit (people who know that better, feel free to correct).<br=
>
<br>
</span>WH&gt; some HW cannot do this at all, so lets dismiss this idea.<br>
<span><br>
&gt;The multiple-loopback approach has operational drawbacks, but whether o=
r<br>
&gt;not these are killer issues may depend on the targeted scale (in terms<=
br>
&gt;of number of NVEs) and may depend on other factors (operator practices,=
<br>
&gt;ability to automate ASBR configs).<br>
<br>
</span>WH&gt; ok now we have not discussed the constraints some HW vendors =
have with respect to global VNIDs. To make this work all VNID/Labels need t=
o be globally unique. Hmmmmm<br>
<span><br>
&gt;<br>
&gt;The alternative approach, put forward by Wim, consist in using existing=
<br>
&gt;Option-C with a variant of the 3-label variant relying on an<br>
&gt;MPLS/MPLS/UDP-or-GRE encap (instead of the 3-label MPLS stack).&nbsp; T=
his<br>
&gt;approach would not necessitate new standardized procedures, would<br>
&gt;require less changes on ASBRs. However it is not supported today by<br>
&gt;vswitches or ToRs (unless the bottom MPLS label is passed to the VM,<br=
>
&gt;which I think would restrict the application to a subset of the<br>
&gt;scenarios for which Option C is interesting). Having it supported in<br=
>
&gt;vswitches may be a simple matter of writing the software, but ToR<br>
&gt;support seems to require evolution in chipsets ; whether such a support=
<br>
&gt;is likely to appear hasn't been discussed in the thread.<br>
&gt;<br>
&gt;All in all, it seems there is no solution to cover an Option C scenario=
<br>
&gt;with today's generation ToRs, and the question for tomorrow's generatio=
n<br>
&gt;ToRs hasn't been really discussed.<br>
&gt;<br>
&gt;Based on the above, I would think the question boils down to whether it=
<br>
&gt;is desirable to specify an Option C variant usable with vswitches as<br=
>
&gt;they are today and possibly usable with a performance hit with today's<=
br>
&gt;ToRs chipsets, at the expense of a required evolution on ASBRs.&nbsp; T=
he<br>
&gt;alternative requiring some evolution on vswitches and waiting for futur=
e<br>
&gt;ToRs chipsets.<br>
<br>
</span>WH&gt; I vote for a an evolution of switches/TORs that have proper s=
upport for this.<br>
I hope some HW vendors of TOR chips shime in, but I am told the MPLS soluti=
on is possible in the next generation chips they are working on.<br>
<br>
The other options requires baggage forever on the ASBR elements that does n=
ot bring value and it is better to avoid this and build an architecture whi=
ch is future proof and more cost effective. My 2 cents<br>
<div class=3D"HOEnZb">
<div class=3D"h5">&gt;<br>
&gt;-Thomas<br>
&gt;<br>
&gt;<br>
&gt;Zhuangshunwan&nbsp; :<br>
&gt;&gt;<br>
&gt;&gt; Hi Diego,<br>
&gt;&gt;<br>
&gt;&gt; Thanks for your comments. Pls see inline with [Vincent].<br>
&gt;&gt;<br>
&gt;&gt; Vincent<br>
&gt;&gt;<br>
&gt;&gt; *=B7=A2=BC=FE=C8=CB:*BESS [mailto:<a href=3D"mailto:bess-bounces@i=
etf.org" target=3D"_blank">bess-bounces@ietf.org</a>] *=B4=FA=B1=ED *Diego =
Garcia del Rio<br>
&gt;&gt; *=B7=A2=CB=CD=CA=B1=BC=E4:*2015=C4=EA11=D4=C218=C8=D514:25<br>
&gt;&gt; *=CA=D5=BC=FE=C8=CB:*<a href=3D"mailto:bess@ietf.org" target=3D"_b=
lank">bess@ietf.org</a><br>
&gt;&gt; *=D6=F7=CC=E2:*Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br=
>
&gt;&gt;<br>
&gt;&gt; Some comments from my side,<br>
&gt;&gt; I think the draft makes quite a few assumptions on specific<br>
&gt;&gt; implementation details that are way too general to be considered<b=
r>
&gt;&gt; widely available.<br>
&gt;&gt; Most of the TOR devices today already pay a double-pass penalty wh=
en<br>
&gt;&gt; doing routing of traffic in/out of vxlan-type tunnels. Only the ne=
west<br>
&gt;&gt; generation can route into tunnels without additional passes. And a=
re<br>
&gt;&gt; definitively limited in being able to arbitrary select UDP ports o=
n a<br>
&gt;&gt; per tunnel basis. In fact, most are even limited at using more tha=
n<br>
&gt;&gt; one VNID per &quot;service&quot; of sorts.<br>
&gt;&gt; [Vincent]: Yes, the new generation BCM chipset has already support=
ed<br>
&gt;&gt; VXLAN routing without additional passes. For OVS/TOR, VXLAN<br>
&gt;&gt; encapsulation is more popular than MPLSoGRE/UDP, and has better<br=
>
&gt;&gt; performance.<br>
&gt;&gt; The IP-addressed based implementation which would, I assume, imply=
<br>
&gt;&gt; assigning one or more CIDRs to a loopback interface on the ASBR-d =
is<br>
&gt;&gt; also quite arbitrary and does not seem like a technically &quot;cl=
ean&quot;<br>
&gt;&gt; solution. (besides burning tons of IPs). As a side-note, most PE-g=
rade<br>
&gt;&gt; routers i've worked with were quite limited in terms of IP address=
es<br>
&gt;&gt; used for tunnel termination and it wasn't that just a simple pool =
can<br>
&gt;&gt; be used.<br>
&gt;&gt; [Vincent]: I think the larger VTEP IP address range on ASBR-d has =
no<br>
&gt;&gt; limitations. For the hardware on ASBR-d, it has capability to<br>
&gt;&gt; terminate multiple VXLAN tunnels with arbitrary destination VTEP I=
P<br>
&gt;&gt; addresses.<br>
&gt;&gt; Wim's mentions on cases where the Application itself, hosted in a<=
br>
&gt;&gt; datacenter, would be part of the option-C interconnect, was dismis=
sed<br>
&gt;&gt; without much discussion so far, while, if we look in detail at the=
<br>
&gt;&gt; type of users which will even consider a complex topology like mod=
el-C<br>
&gt;&gt; its most likely users and operators very familiar with MPLS VPNs i=
n<br>
&gt;&gt; the WAN. Those type of operators will most likely be very interest=
ed<br>
&gt;&gt; in deploying MPLS or WAN-grade applications (i.e., virtual-routers=
 or<br>
&gt;&gt; other VNFs) in the DC and thus its highly likely that the intercon=
nect<br>
&gt;&gt; would not terminate at the NVE itself but rather the TS (the virtu=
al<br>
&gt;&gt; machine).<br>
&gt;&gt; Also, the use of UDP ports at random would imply quite complex log=
ic<br>
&gt;&gt; on the ASBR-d IMHO. Im not saying its impossible, but since the<br=
>
&gt;&gt; received packet now not only has to be received on a random (thoug=
h<br>
&gt;&gt; locally chosen) UDP port and this information preserved in the<br>
&gt;&gt; pipeline to be able to do the double-tunnel-stitching, it sounds q=
uite<br>
&gt;&gt; complex. I am sure someone in the list will mention this has alrea=
dy<br>
&gt;&gt; been implemented somewhere, and I won't argue with that. And let's=
 not<br>
&gt;&gt; even bring into account what this would do to any DC middlebox tha=
t<br>
&gt;&gt; now has to look at vxlan over almost any random port. We have to g=
o<br>
&gt;&gt; back to the &quot;is it a 4 or is it a 6 in byte x&quot; heuristic=
s to try to<br>
&gt;&gt; guess whether the packet is vxlan or just something entirely diffe=
rent<br>
&gt;&gt; running over IP.<br>
&gt;&gt; [Vincent]: Using NP or multi-core CPU hardware technology, it can =
be<br>
&gt;&gt; implemented although deeper packet inspection is needed to perform=
 UDP<br>
&gt;&gt; port and MPLS stitching.<br>
&gt;&gt; In general I feel the proposed solution seems to be fitting of a<b=
r>
&gt;&gt; specific use-case which is not really detailed in the draft and do=
es<br>
&gt;&gt; not describe&nbsp; &nbsp;a solution that would &quot;elegantly&quo=
t; solve the issues at<br>
&gt;&gt; hand. It just feels like we're using any available bit-space to st=
uff<br>
&gt;&gt; data into places that do not necesarily belong.<br>
&gt;&gt; Yes, MPLS encapsulations on virtual switches are not yet fully<br>
&gt;&gt; available, and there can be some performance penalty on the TORs, =
but<br>
&gt;&gt; the solutions are much cleaner from a control and data plane point=
 of<br>
&gt;&gt; view. Maybe I'm too utopic.<br>
&gt;&gt; [Vincent]: I think pure VXLAN solution has its scenario, it's gene=
ral<br>
&gt;&gt; rather than specific. We can't require all OVS/NVEs support VXLAN =
&#43;<br>
&gt;&gt; MPLSoGRE at the same time.<br>
&gt;&gt; Best regards,<br>
&gt;&gt; Diego<br>
&gt;&gt; ------------------------------------------------------------------=
---------------<br>
&gt;&gt; Hi,<br>
&gt;&gt; The problem we are trying to solve is to reduce data center<br>
&gt;&gt; GW/ASBR-d's forwarding table size, the motivation is same as<br>
&gt;&gt; traditional MPLS VPN option-C. Currently, the most common practise=
 on<br>
&gt;&gt; ASBR-d is to terminate VXLAN encapsulation, look up local routing<=
br>
&gt;&gt; table, and then perform MPLS encapsulation to the WAN network. ASB=
R-d<br>
&gt;&gt; needs to maintain all VM's MAC/IP. In Option-C method, only transp=
ort<br>
&gt;&gt; layer information needed to be maintained at GW/ASBR-d, the<br>
&gt;&gt; scalability will be greatly enhanced. Traditonal Option-C is only =
for<br>
&gt;&gt; MPLS VPN network interworking, because VXLAN is becoming pervasive=
 in<br>
&gt;&gt; data center,&nbsp; the solution in this draft was proposed for the=
<br>
&gt;&gt; heterogeneous network interworking.<br>
&gt;&gt; The advantage of this solution is that only VXLAN encapsulation is=
<br>
&gt;&gt; required for OVS/TOR. Unlike Wim's solution, east-west bound traff=
ic<br>
&gt;&gt; uses VXLAN encap, while north-south bound traffic uses MPLSoGRE/UD=
P encap.<br>
&gt;&gt; There are two solutions in this draft:<br>
&gt;&gt; 1. Using VXLAN tunnel destination IP for stitching at ASBR-d.<br>
&gt;&gt; No data plane modification requirements on OVS or TOR switches, on=
ly<br>
&gt;&gt; hardware changes on ASBR-d. ASBR-d normally is router, it has<br>
&gt;&gt; capability to realize the hardware changes. It will consume many I=
P<br>
&gt;&gt; addresses and the IP pool for allocation needs to be configured on=
<br>
&gt;&gt; ASBR-d beforehand.<br>
&gt;&gt; 2. Using VXLAN destination UDP port for stitching at ASBR-d.<br>
&gt;&gt; Compared with solution 1, less IP address will be consumed for<br>
&gt;&gt; allocation. If UDP port range is too large, we can combine with<br=
>
&gt;&gt; solution 1 and 2.<br>
&gt;&gt; In this solution, both data plane modification changes are needed =
at<br>
&gt;&gt; OVS/TOR and ASBR-d. ASBR-d also has capability to realize the hard=
ware<br>
&gt;&gt; changes. For OVS, it also can realize the data plane changes. For =
TOR<br>
&gt;&gt; switch, it normally can't realize this function.&nbsp; This soluti=
on mainly<br>
&gt;&gt; focuses on pure software based overlay network, it has more<br>
&gt;&gt; scalability. In public cloud data center, software based overlay<b=
r>
&gt;&gt; network is the majority case.<br>
&gt;&gt; Whether using solution 1 or 2 depends on the operators real envion=
ment.<br>
&gt;&gt; So I think our solution has no flaws, it works fine.<br>
&gt;&gt; Thanks,<br>
&gt;&gt; weiguo<br>
&gt;&gt; ________________________________<br>
&gt;&gt; From: BESS [<a href=3D"mailto:bess-bounces@ietf.org" target=3D"_bl=
ank">bess-bounces@ietf.org</a> &lt;mailto:<a href=3D"mailto:bess-bounces@ie=
tf.org" target=3D"_blank">bess-bounces@ietf.org</a>&gt;] on<br>
&gt;&gt; behalf of John E Drake [<a href=3D"mailto:jdrake@juniper.net" targ=
et=3D"_blank">jdrake@juniper.net</a> &lt;mailto:<a href=3D"mailto:jdrake@ju=
niper.net" target=3D"_blank">jdrake@juniper.net</a>&gt;]<br>
&gt;&gt; Sent: Wednesday, November 18, 2015 2:49<br>
&gt;&gt; To: Henderickx, Wim (Wim); EXT - <a href=3D"mailto:thomas.morin@or=
ange.com" target=3D"_blank">
thomas.morin@orange.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com" target=3D"_b=
lank">thomas.morin@orange.com</a>&gt;; BESS<br>
&gt;&gt; Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br>
&gt;&gt; Hi,<br>
&gt;&gt; I think Wim has conclusively demonstrated that this draft has fata=
l<br>
&gt;&gt; flaws and I don=A1=AFt support it.&nbsp; I also agree with his sug=
gestion that<br>
&gt;&gt; we first figure out what problem we are trying to solve before sol=
ving it.<br>
&gt;&gt; Yours Irrespectively,<br>
&gt;&gt; John<br>
&gt;&gt; From: BESS [mailto:<a href=3D"mailto:bess-bounces@ietf.org" target=
=3D"_blank">bess-bounces@ietf.org</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:bess-bounces@ietf.org" target=3D"_bla=
nk">bess-bounces@ietf.org</a>&gt;] On Behalf Of Henderickx, Wim (Wim)<br>
&gt;&gt; Sent: Tuesday, November 17, 2015 12:49 PM<br>
&gt;&gt; To: EXT - <a href=3D"mailto:thomas.morin@orange.com" target=3D"_bl=
ank">thomas.morin@orange.com</a> &lt;mailto:<a href=3D"mailto:thomas.morin@=
orange.com" target=3D"_blank">thomas.morin@orange.com</a>&gt;; BESS<br>
&gt;&gt; Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br>
&gt;&gt; =A1=AA Snip =A1=AA<br>
&gt;&gt; No, the spec as it is can be implemented in its VXLAN variant with=
<br>
&gt;&gt; existing vswitches (e.g. OVS allows to choose the VXLAN destinatio=
n<br>
&gt;&gt; port, ditto for the linux kernel stack).<br>
&gt;&gt; (ToR is certainly another story, most of them not having a flexibl=
e<br>
&gt;&gt; enough VXLAN dataplane nor support for any MPLS-over-IP.)<br>
&gt;&gt; WH&gt; and how many ports simultaneously would they support? For t=
his to<br>
&gt;&gt; work every tenant needs a different VXLAN UDP destination port/rec=
eive<br>
&gt;&gt; port.<br>
&gt;&gt; There might be SW elements that could do some of this, but IETF<br=
>
&gt;&gt; defines solutions which should be implemented across the board<br>
&gt;&gt; HW/SW/etc. Even if some SW switches can do this, the proposal will=
<br>
&gt;&gt; impose so many issues in HW/data-plane engines that I cannot be be=
hind<br>
&gt;&gt; this solution.<br>
&gt;&gt; To make this work generically we will have to make changes anyhow.=
<br>
&gt;&gt; Given this, we better do it in the right way and guide the industr=
y to<br>
&gt;&gt; a solution which does not imply those complexities. Otherwise we w=
ill<br>
&gt;&gt; stick with these specials forever with all consequences (bugs, etc=
).<br>
&gt;&gt; - snip -<br>
&gt;&gt; From: &quot;<a href=3D"mailto:thomas.morin@orange.com" target=3D"_=
blank">thomas.morin@orange.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com" target=3D"_b=
lank">thomas.morin@orange.com</a>&gt;&lt;mailto:<a href=3D"mailto:thomas.mo=
rin@orange.com" target=3D"_blank">thomas.morin@orange.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com" target=3D"_b=
lank">thomas.morin@orange.com</a>&gt;&gt;&quot; &lt;<a href=3D"mailto:thoma=
s.morin@orange.com" target=3D"_blank">thomas.morin@orange.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com" target=3D"_b=
lank">thomas.morin@orange.com</a>&gt;&lt;mailto:<a href=3D"mailto:thomas.mo=
rin@orange.com" target=3D"_blank">thomas.morin@orange.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com" target=3D"_b=
lank">thomas.morin@orange.com</a>&gt;&gt;&gt;<br>
&gt;&gt; Organization: Orange<br>
&gt;&gt; Date: Tuesday 17 November 2015 at 01:37<br>
&gt;&gt; To: Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-lu=
cent.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:wim.henderickx@alcatel-lucent.com" ta=
rget=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;&lt;mailto:<a href=
=3D"mailto:wim.henderickx@alcatel-lucent.com" target=3D"_blank">wim.henderi=
ckx@alcatel-lucent.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:wim.henderickx@alcatel-lucent.com" ta=
rget=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;&gt;&gt;, BESS &lt=
;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess=
@ietf.org</a>&gt;&lt;mailto:<a href=3D"mailto:bess@ietf.org" target=3D"_bla=
nk">bess@ietf.org</a> &lt;mailto:<a href=3D"mailto:bess@ietf.org" target=3D=
"_blank">bess@ietf.org</a>&gt;&gt;&gt;<br>
&gt;&gt; Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br>
&gt;&gt; Hi Wim, WG,<br>
&gt;&gt; 2015-11-16, Henderickx, Wim (Wim):<br>
&gt;&gt; 2015-11-13, Henderickx, Wim (Wim):<br>
&gt;&gt; Thomas, we can discuss forever and someone need to describe<br>
&gt;&gt; requirements, but the current proposal I cannot agree to for the<b=
r>
&gt;&gt; reasons explained.<br>
&gt;&gt; TM&gt; Well, although discussing forever is certainly not the goal=
, the<br>
&gt;&gt; reasons for rejecting a proposal need to be thoroughly understood.=
<br>
&gt;&gt; WH&gt; my point is what is the real driver for supporting a plain =
VXLAN<br>
&gt;&gt; data-plane here, the use cases I have seen in this txt is always w=
here<br>
&gt;&gt; an application behind a NVE/TOR is demanding option c, but none of=
 the<br>
&gt;&gt; NVE/TOR elements.<br>
&gt;&gt; My understanding is that the applications&nbsp; are contexts where=
 overlays<br>
&gt;&gt; are present is when workloads (VMs or baremetal) need to be<br>
&gt;&gt; interconnected with VPNs. In these contexts, there can be reasons =
to<br>
&gt;&gt; want Option C to reduce the state on ASBRs.<br>
&gt;&gt; In these context, its not the workload (VM or baremetal) that woul=
d<br>
&gt;&gt; typically handle VRFs, but really the vswitch or ToR.<br>
&gt;&gt; WH2&gt; can it not be all cases: TOR/vswitch/Application. I would =
make<br>
&gt;&gt; the solution flexible to support all of these not?<br>
&gt;&gt; 2015-11-13, Henderickx, Wim (Wim):<br>
&gt;&gt; TM&gt; The right trade-off to make may in fact depend on whether y=
ou prefer:<br>
&gt;&gt; (a) a new dataplane stitching behavior on DC ASBRs (the behavior<b=
r>
&gt;&gt; specified in this draft)<br>
&gt;&gt; or (b) an evolution of the encaps on the vswitches and ToRs to sup=
port<br>
&gt;&gt; MPLS/MPLS/(UDP or GRE)<br>
&gt;&gt; WH&gt; b depends on the use case<br>
&gt;&gt; I don't get what you mean by &quot;b depends on the use case&quot;=
.<br>
&gt;&gt; WH&gt; see my above comment. If the real use case is an applicatio=
n<br>
&gt;&gt; behind NVE/TOR requiring model C, than all the discussion on impac=
t on<br>
&gt;&gt; NVE/TOR is void. As such I want to have a discussion on the real<b=
r>
&gt;&gt; driver/requirement for option c interworking with an IP based Fabr=
ic.<br>
&gt;&gt; Although I can agree than detailing requirements can always help, =
I<br>
&gt;&gt; don't think one can assume a certain application to dismiss the pr=
oposal.<br>
&gt;&gt; WH&gt; for me the proposal is not acceptable for the reasons expla=
ined:<br>
&gt;&gt; too much impact on the data-planes<br>
&gt;&gt; I wrote the above based on the idea that the encap used in<br>
&gt;&gt; MPLS/MPLS/(UDP or GRE), which hence has to be supported on the ToR=
s<br>
&gt;&gt; and vswitches.<br>
&gt;&gt; Another possibility would be service-label/middle-label/Ethernet<b=
r>
&gt;&gt; assuming an L2 adjacency between vswitches/ToRs and ASBRs, but thi=
s<br>
&gt;&gt; certainly does not match your typical DC architecture. Or perhaps =
had<br>
&gt;&gt; you something else in mind ?<br>
&gt;&gt; WH&gt; see above. The draft right now also requires changes in exi=
sting<br>
&gt;&gt; TOR/NVE so for me all this discussion/debate is void.<br>
&gt;&gt; No, the spec as it is can be implemented in its VXLAN variant with=
<br>
&gt;&gt; existing vswitches (e.g. OVS allows to choose the VXLAN destinatio=
n<br>
&gt;&gt; port, ditto for the linux kernel stack).<br>
&gt;&gt; (ToR is certainly another story, most of them not having a flexibl=
e<br>
&gt;&gt; enough VXLAN dataplane nor support for any MPLS-over-IP.)<br>
&gt;&gt; WH&gt; and how many ports simultaneously would they support?<br>
&gt;&gt; WH&gt; and depending on implementation you don=A1=AFt need to chan=
ge any of<br>
&gt;&gt; the TOR/vswitches.<br>
&gt;&gt; Does this mean that for some implementations you may not need to<b=
r>
&gt;&gt; change any of the TOR/vswitches, but that for some others you may =
?<br>
&gt;&gt; WH&gt; any proposal on the table requires changes, so for me this =
is not<br>
&gt;&gt; a valid discussion<br>
&gt;&gt; See above, the proposal in the draft does not necessarily need cha=
nges<br>
&gt;&gt; in vswitches.<br>
&gt;&gt; Let me take a practical example : while I can quite easily see how=
 to<br>
&gt;&gt; implement the procedures in draft-hao-bess-inter-nvo3-vpn-optionc<=
br>
&gt;&gt; based on current vswitch implementations of VXLAN, the lack of<br>
&gt;&gt; MPLS/MPLS/(UDP, GRE) support in commonplace vswitches seems to me =
as<br>
&gt;&gt; making that alternate solution you suggest harder to implement.<br=
>
&gt;&gt; WH&gt; I would disagree to this. Tell me which switch/TOR handles<=
br>
&gt;&gt; multiple UDP ports for VXLAN ?<br>
&gt;&gt; I mentioned _v_switches, and many do support a variable destinatio=
n<br>
&gt;&gt; port for VXLAN, which is sufficient to implement what the draft pr=
oposes.<br>
&gt;&gt; -Thomas<br>
&gt;&gt; From: Thomas Morin &lt;<a href=3D"mailto:thomas.morin@orange.com" =
target=3D"_blank">thomas.morin@orange.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com" target=3D"_b=
lank">thomas.morin@orange.com</a>&gt;&lt;mailto:<a href=3D"mailto:thomas.mo=
rin@orange.com" target=3D"_blank">thomas.morin@orange.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:thomas.morin@orange.com" target=3D"_b=
lank">thomas.morin@orange.com</a>&gt;&gt;&gt;<br>
&gt;&gt; Organization: Orange<br>
&gt;&gt; Date: Friday 13 November 2015 at 09:57<br>
&gt;&gt; To: Wim Henderickx &lt;<a href=3D"mailto:wim.henderickx@alcatel-lu=
cent.com" target=3D"_blank">wim.henderickx@alcatel-lucent.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:wim.henderickx@alcatel-lucent.com" ta=
rget=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;&lt;mailto:<a href=
=3D"mailto:wim.henderickx@alcatel-lucent.com" target=3D"_blank">wim.henderi=
ckx@alcatel-lucent.com</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:wim.henderickx@alcatel-lucent.com" ta=
rget=3D"_blank">wim.henderickx@alcatel-lucent.com</a>&gt;&gt;&gt;<br>
&gt;&gt; Cc: &quot;<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@=
ietf.org</a> &lt;mailto:<a href=3D"mailto:bess@ietf.org" target=3D"_blank">=
bess@ietf.org</a>&gt;&lt;mailto:<a href=3D"mailto:bess@ietf.org" target=3D"=
_blank">bess@ietf.org</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess=
@ietf.org</a>&gt;&gt;&quot; &lt;<a href=3D"mailto:bess@ietf.org" target=3D"=
_blank">bess@ietf.org</a><br>
&gt;&gt; &lt;mailto:<a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess=
@ietf.org</a>&gt;&lt;mailto:<a href=3D"mailto:bess@ietf.org" target=3D"_bla=
nk">bess@ietf.org</a> &lt;mailto:<a href=3D"mailto:bess@ietf.org" target=3D=
"_blank">bess@ietf.org</a>&gt;&gt;&gt;<br>
&gt;&gt; Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc<br>
&gt;&gt; Hi Wim,<br>
&gt;&gt; I agree on the analysis that this proposal is restricted to<br>
&gt;&gt; implementations that supports the chosen encap with non-IANA ports=
<br>
&gt;&gt; (which may be hard to achieve for instance on hardware<br>
&gt;&gt; implementations, as you suggest), or to context where managing<br>
&gt;&gt; multiple IPs would be operationally viable.<br>
&gt;&gt; However, it does not seem obvious to me how the alternative you<br=
>
&gt;&gt; propose [relying on 3-label option C with an MPLS/MPLS/(UDP|GRE)<b=
r>
&gt;&gt; encap] addresses the issue of whether the encap behavior is suppor=
ted<br>
&gt;&gt; or not (e.g. your typical ToR chipset possibly may not support thi=
s<br>
&gt;&gt; kind of encap,&nbsp; and even software-based switches may not be r=
eady to<br>
&gt;&gt; support that today).<br>
&gt;&gt; My take is that having different options to adapt to various<br>
&gt;&gt; implementations constraints we may have would have value.<br>
&gt;&gt; (&#43; one question below on VXLAN...)<br>
&gt;&gt; -Thomas<br>
&gt;&gt; 2015-11-12, Henderickx, Wim (Wim):<br>
&gt;&gt; On VXLAN/NVGRE, do you challenge the fact that they would be used =
with<br>
&gt;&gt; a dummy MAC address that would be replaced by the right MAC by a<b=
r>
&gt;&gt; sender based on an ARP request when needed ?<br>
&gt;&gt; Is the above the issue you had in mind about VXLAN and NVGRE ?<br>
&gt;&gt; WH&gt; yes<br>
&gt;&gt; I you don't mind me asking : why do you challenge that ?<br>
&gt;&gt;<br>
&gt;<br>
&gt;_______________________________________________<br>
&gt;BESS mailing list<br>
&gt;<a href=3D"mailto:BESS@ietf.org" target=3D"_blank">BESS@ietf.org</a><br=
>
&gt;<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferre=
r" target=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
_______________________________________________<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org" target=3D"_blank">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
</div>
</div>
</blockquote>
</div>
<br>
</div>
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2015-11-19, Henderickx, Wim (Wim):
> WH> I vote for a an evolution of switches/TORs that have proper
> support for this. I hope some HW vendors of TOR chips shime in, but I
> am told the MPLS solution is possible in the next generation chips
> they are working on.

Well, it looks like the key questions are:
- when would ToR chips support MPLS/MPLS/UDP ?  (the generation that has 
been released recently but not present in most shipping ToRs yet, the 
next one ?)
- do we want an interim VXLAN-based solution ? (that will involve at 
best a performance penalty with existing chips, and at worse impossible 
to implement -- we haven't seen clear information in this thread)

-Thomas


>> Zhuangshunwan  :
>>>
>>> Hi Diego,
>>>
>>> Thanks for your comments. Pls see inline with [Vincent].
>>>
>>> Vincent
>>>
>>> *发件人:*BESS [mailto:bess-bounces@ietf.org] *代表 *Diego Garcia del
>>> Rio *发送时间:*2015年11月18日14:25 *收件人:*bess@ietf.org *主题:*Re: [bess]
>>> draft-hao-bess-inter-nvo3-vpn-optionc
>>>
>>> Some comments from my side, I think the draft makes quite a few
>>> assumptions on specific implementation details that are way too
>>> general to be considered widely available. Most of the TOR
>>> devices today already pay a double-pass penalty when doing
>>> routing of traffic in/out of vxlan-type tunnels. Only the newest
>>> generation can route into tunnels without additional passes. And
>>> are definitively limited in being able to arbitrary select UDP
>>> ports on a per tunnel basis. In fact, most are even limited at
>>> using more than one VNID per "service" of sorts. [Vincent]: Yes,
>>> the new generation BCM chipset has already supported VXLAN
>>> routing without additional passes. For OVS/TOR, VXLAN
>>> encapsulation is more popular than MPLSoGRE/UDP, and has better
>>> performance. The IP-addressed based implementation which would, I
>>> assume, imply assigning one or more CIDRs to a loopback interface
>>> on the ASBR-d is also quite arbitrary and does not seem like a
>>> technically "clean" solution. (besides burning tons of IPs). As a
>>> side-note, most PE-grade routers i've worked with were quite
>>> limited in terms of IP addresses used for tunnel termination and
>>> it wasn't that just a simple pool can be used. [Vincent]: I think
>>> the larger VTEP IP address range on ASBR-d has no limitations.
>>> For the hardware on ASBR-d, it has capability to terminate
>>> multiple VXLAN tunnels with arbitrary destination VTEP IP
>>> addresses. Wim's mentions on cases where the Application itself,
>>> hosted in a datacenter, would be part of the option-C
>>> interconnect, was dismissed without much discussion so far,
>>> while, if we look in detail at the type of users which will even
>>> consider a complex topology like model-C its most likely users
>>> and operators very familiar with MPLS VPNs in the WAN. Those type
>>> of operators will most likely be very interested in deploying
>>> MPLS or WAN-grade applications (i.e., virtual-routers or other
>>> VNFs) in the DC and thus its highly likely that the interconnect
>>> would not terminate at the NVE itself but rather the TS (the
>>> virtual machine). Also, the use of UDP ports at random would
>>> imply quite complex logic on the ASBR-d IMHO. Im not saying its
>>> impossible, but since the received packet now not only has to be
>>> received on a random (though locally chosen) UDP port and this
>>> information preserved in the pipeline to be able to do the
>>> double-tunnel-stitching, it sounds quite complex. I am sure
>>> someone in the list will mention this has already been
>>> implemented somewhere, and I won't argue with that. And let's
>>> not even bring into account what this would do to any DC
>>> middlebox that now has to look at vxlan over almost any random
>>> port. We have to go back to the "is it a 4 or is it a 6 in byte
>>> x" heuristics to try to guess whether the packet is vxlan or just
>>> something entirely different running over IP. [Vincent]: Using NP
>>> or multi-core CPU hardware technology, it can be implemented
>>> although deeper packet inspection is needed to perform UDP port
>>> and MPLS stitching. In general I feel the proposed solution seems
>>> to be fitting of a specific use-case which is not really detailed
>>> in the draft and does not describe   a solution that would
>>> "elegantly" solve the issues at hand. It just feels like we're
>>> using any available bit-space to stuff data into places that do
>>> not necesarily belong. Yes, MPLS encapsulations on virtual
>>> switches are not yet fully available, and there can be some
>>> performance penalty on the TORs, but the solutions are much
>>> cleaner from a control and data plane point of view. Maybe I'm
>>> too utopic. [Vincent]: I think pure VXLAN solution has its
>>> scenario, it's general rather than specific. We can't require all
>>> OVS/NVEs support VXLAN + MPLSoGRE at the same time. Best
>>> regards, Diego
>>> ---------------------------------------------------------------------------------
>>>
>>>
Hi,
>>> The problem we are trying to solve is to reduce data center
>>> GW/ASBR-d's forwarding table size, the motivation is same as
>>> traditional MPLS VPN option-C. Currently, the most common
>>> practise on ASBR-d is to terminate VXLAN encapsulation, look up
>>> local routing table, and then perform MPLS encapsulation to the
>>> WAN network. ASBR-d needs to maintain all VM's MAC/IP. In
>>> Option-C method, only transport layer information needed to be
>>> maintained at GW/ASBR-d, the scalability will be greatly
>>> enhanced. Traditonal Option-C is only for MPLS VPN network
>>> interworking, because VXLAN is becoming pervasive in data center,
>>> the solution in this draft was proposed for the heterogeneous
>>> network interworking. The advantage of this solution is that only
>>> VXLAN encapsulation is required for OVS/TOR. Unlike Wim's
>>> solution, east-west bound traffic uses VXLAN encap, while
>>> north-south bound traffic uses MPLSoGRE/UDP encap. There are two
>>> solutions in this draft: 1. Using VXLAN tunnel destination IP for
>>> stitching at ASBR-d. No data plane modification requirements on
>>> OVS or TOR switches, only hardware changes on ASBR-d. ASBR-d
>>> normally is router, it has capability to realize the hardware
>>> changes. It will consume many IP addresses and the IP pool for
>>> allocation needs to be configured on ASBR-d beforehand. 2. Using
>>> VXLAN destination UDP port for stitching at ASBR-d. Compared with
>>> solution 1, less IP address will be consumed for allocation. If
>>> UDP port range is too large, we can combine with solution 1 and
>>> 2. In this solution, both data plane modification changes are
>>> needed at OVS/TOR and ASBR-d. ASBR-d also has capability to
>>> realize the hardware changes. For OVS, it also can realize the
>>> data plane changes. For TOR switch, it normally can't realize
>>> this function.  This solution mainly focuses on pure software
>>> based overlay network, it has more scalability. In public cloud
>>> data center, software based overlay network is the majority
>>> case. Whether using solution 1 or 2 depends on the operators real
>>> envionment. So I think our solution has no flaws, it works fine.
>>> Thanks, weiguo ________________________________ From: BESS
>>> [bess-bounces@ietf.org <mailto:bess-bounces@ietf.org>] on behalf
>>> of John E Drake [jdrake@juniper.net <mailto:jdrake@juniper.net>]
>>> Sent: Wednesday, November 18, 2015 2:49 To: Henderickx, Wim
>>> (Wim); EXT - thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com>; BESS Subject: Re: [bess]
>>> draft-hao-bess-inter-nvo3-vpn-optionc Hi, I think Wim has
>>> conclusively demonstrated that this draft has fatal flaws and I
>>> don’t support it.  I also agree with his suggestion that we first
>>> figure out what problem we are trying to solve before solving
>>> it. Yours Irrespectively, John From: BESS
>>> [mailto:bess-bounces@ietf.org <mailto:bess-bounces@ietf.org>] On
>>> Behalf Of Henderickx, Wim (Wim) Sent: Tuesday, November 17, 2015
>>> 12:49 PM To: EXT - thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com>; BESS Subject: Re: [bess]
>>> draft-hao-bess-inter-nvo3-vpn-optionc — Snip — No, the spec as it
>>> is can be implemented in its VXLAN variant with existing
>>> vswitches (e.g. OVS allows to choose the VXLAN destination port,
>>> ditto for the linux kernel stack). (ToR is certainly another
>>> story, most of them not having a flexible enough VXLAN dataplane
>>> nor support for any MPLS-over-IP.) WH> and how many ports
>>> simultaneously would they support? For this to work every tenant
>>> needs a different VXLAN UDP destination port/receive port. There
>>> might be SW elements that could do some of this, but IETF defines
>>> solutions which should be implemented across the board HW/SW/etc.
>>> Even if some SW switches can do this, the proposal will impose so
>>> many issues in HW/data-plane engines that I cannot be behind this
>>> solution. To make this work generically we will have to make
>>> changes anyhow. Given this, we better do it in the right way and
>>> guide the industry to a solution which does not imply those
>>> complexities. Otherwise we will stick with these specials forever
>>> with all consequences (bugs, etc). - snip - From:
>>> "thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com>>" <thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com>>> Organization: Orange Date:
>>> Tuesday 17 November 2015 at 01:37 To: Wim Henderickx
>>> <wim.henderickx@alcatel-lucent.com
>>> <mailto:wim.henderickx@alcatel-lucent.com><mailto:wim.henderickx@alcatel-lucent.com
>>>
>>>
<mailto:wim.henderickx@alcatel-lucent.com>>>, BESS <bess@ietf.org
>>> <mailto:bess@ietf.org><mailto:bess@ietf.org
>>> <mailto:bess@ietf.org>>> Subject: Re: [bess]
>>> draft-hao-bess-inter-nvo3-vpn-optionc Hi Wim, WG, 2015-11-16,
>>> Henderickx, Wim (Wim): 2015-11-13, Henderickx, Wim (Wim): Thomas,
>>> we can discuss forever and someone need to describe requirements,
>>> but the current proposal I cannot agree to for the reasons
>>> explained. TM> Well, although discussing forever is certainly not
>>> the goal, the reasons for rejecting a proposal need to be
>>> thoroughly understood. WH> my point is what is the real driver
>>> for supporting a plain VXLAN data-plane here, the use cases I
>>> have seen in this txt is always where an application behind a
>>> NVE/TOR is demanding option c, but none of the NVE/TOR elements.
>>> My understanding is that the applications  are contexts where
>>> overlays are present is when workloads (VMs or baremetal) need to
>>> be interconnected with VPNs. In these contexts, there can be
>>> reasons to want Option C to reduce the state on ASBRs. In these
>>> context, its not the workload (VM or baremetal) that would
>>> typically handle VRFs, but really the vswitch or ToR. WH2> can it
>>> not be all cases: TOR/vswitch/Application. I would make the
>>> solution flexible to support all of these not? 2015-11-13,
>>> Henderickx, Wim (Wim): TM> The right trade-off to make may in
>>> fact depend on whether you prefer: (a) a new dataplane stitching
>>> behavior on DC ASBRs (the behavior specified in this draft) or
>>> (b) an evolution of the encaps on the vswitches and ToRs to
>>> support MPLS/MPLS/(UDP or GRE) WH> b depends on the use case I
>>> don't get what you mean by "b depends on the use case". WH> see
>>> my above comment. If the real use case is an application behind
>>> NVE/TOR requiring model C, than all the discussion on impact on
>>> NVE/TOR is void. As such I want to have a discussion on the real
>>> driver/requirement for option c interworking with an IP based
>>> Fabric. Although I can agree than detailing requirements can
>>> always help, I don't think one can assume a certain application
>>> to dismiss the proposal. WH> for me the proposal is not
>>> acceptable for the reasons explained: too much impact on the
>>> data-planes I wrote the above based on the idea that the encap
>>> used in MPLS/MPLS/(UDP or GRE), which hence has to be supported
>>> on the ToRs and vswitches. Another possibility would be
>>> service-label/middle-label/Ethernet assuming an L2 adjacency
>>> between vswitches/ToRs and ASBRs, but this certainly does not
>>> match your typical DC architecture. Or perhaps had you something
>>> else in mind ? WH> see above. The draft right now also requires
>>> changes in existing TOR/NVE so for me all this discussion/debate
>>> is void. No, the spec as it is can be implemented in its VXLAN
>>> variant with existing vswitches (e.g. OVS allows to choose the
>>> VXLAN destination port, ditto for the linux kernel stack). (ToR
>>> is certainly another story, most of them not having a flexible
>>> enough VXLAN dataplane nor support for any MPLS-over-IP.) WH> and
>>> how many ports simultaneously would they support? WH> and
>>> depending on implementation you don’t need to change any of the
>>> TOR/vswitches. Does this mean that for some implementations you
>>> may not need to change any of the TOR/vswitches, but that for
>>> some others you may ? WH> any proposal on the table requires
>>> changes, so for me this is not a valid discussion See above, the
>>> proposal in the draft does not necessarily need changes in
>>> vswitches. Let me take a practical example : while I can quite
>>> easily see how to implement the procedures in
>>> draft-hao-bess-inter-nvo3-vpn-optionc based on current vswitch
>>> implementations of VXLAN, the lack of MPLS/MPLS/(UDP, GRE)
>>> support in commonplace vswitches seems to me as making that
>>> alternate solution you suggest harder to implement. WH> I would
>>> disagree to this. Tell me which switch/TOR handles multiple UDP
>>> ports for VXLAN ? I mentioned _v_switches, and many do support a
>>> variable destination port for VXLAN, which is sufficient to
>>> implement what the draft proposes. -Thomas From: Thomas Morin
>>> <thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com>>> Organization: Orange Date:
>>> Friday 13 November 2015 at 09:57 To: Wim Henderickx
>>> <wim.henderickx@alcatel-lucent.com
>>> <mailto:wim.henderickx@alcatel-lucent.com><mailto:wim.henderickx@alcatel-lucent.com
>>>
>>>
<mailto:wim.henderickx@alcatel-lucent.com>>>
>>> Cc: "bess@ietf.org <mailto:bess@ietf.org><mailto:bess@ietf.org
>>> <mailto:bess@ietf.org>>" <bess@ietf.org
>>> <mailto:bess@ietf.org><mailto:bess@ietf.org
>>> <mailto:bess@ietf.org>>> Subject: Re: [bess]
>>> draft-hao-bess-inter-nvo3-vpn-optionc Hi Wim, I agree on the
>>> analysis that this proposal is restricted to implementations that
>>> supports the chosen encap with non-IANA ports (which may be hard
>>> to achieve for instance on hardware implementations, as you
>>> suggest), or to context where managing multiple IPs would be
>>> operationally viable. However, it does not seem obvious to me how
>>> the alternative you propose [relying on 3-label option C with an
>>> MPLS/MPLS/(UDP|GRE) encap] addresses the issue of whether the
>>> encap behavior is supported or not (e.g. your typical ToR chipset
>>> possibly may not support this kind of encap,  and even
>>> software-based switches may not be ready to support that today).
>>> My take is that having different options to adapt to various
>>> implementations constraints we may have would have value. (+ one
>>> question below on VXLAN...) -Thomas 2015-11-12, Henderickx, Wim
>>> (Wim): On VXLAN/NVGRE, do you challenge the fact that they would
>>> be used with a dummy MAC address that would be replaced by the
>>> right MAC by a sender based on an ARP request when needed ? Is
>>> the above the issue you had in mind about VXLAN and NVGRE ? WH>
>>> yes I you don't mind me asking : why do you challenge that ?
>>>

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To: Haoweiguo <haoweiguo@huawei.com>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
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From: <thomas.morin@orange.com>
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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2015-11-20, Haoweiguo:
> WH> ok now we have not discussed the constraints some HW vendors have
> with respect to global VNIDs. To make this work all VNID/Labels need
> to be globally unique. Hmmmmm
 > [weiguo2]:  In SDN scenario, a virtual
> network normally is represented by a global VN ID or MPLS VPN Label
> to simplify network management. I think it's not strange to allocate
> global unique MPLS VPN Label or VN ID for a virtual network now.

In an option C scenario you have to take into account what is done in 
the WAN. Globally-assigned labels are not an option there at all.

-Thomas


>>
>> The alternative approach, put forward by Wim, consist in using existing
>> Option-C with a variant of the 3-label variant relying on an
>> MPLS/MPLS/UDP-or-GRE encap (instead of the 3-label MPLS stack).  This
>> approach would not necessitate new standardized procedures, would
>> require less changes on ASBRs. However it is not supported today by
>> vswitches or ToRs (unless the bottom MPLS label is passed to the VM,
>> which I think would restrict the application to a subset of the
>> scenarios for which Option C is interesting). Having it supported in
>> vswitches may be a simple matter of writing the software, but ToR
>> support seems to require evolution in chipsets ; whether such a support
>> is likely to appear hasn't been discussed in the thread.
>>
>> All in all, it seems there is no solution to cover an Option C scenario
>> with today's generation ToRs, and the question for tomorrow's generation
>> ToRs hasn't been really discussed.
>>
>> Based on the above, I would think the question boils down to whether it
>> is desirable to specify an Option C variant usable with vswitches as
>> they are today and possibly usable with a performance hit with today's
>> ToRs chipsets, at the expense of a required evolution on ASBRs.  The
>> alternative requiring some evolution on vswitches and waiting for future
>> ToRs chipsets.
> WH> I vote for a an evolution of switches/TORs that have proper support for this.
> I hope some HW vendors of TOR chips shime in, but I am told the MPLS solution is possible in the next generation chips they are working on.
> [weiguo2]:  I think it's better not to change current TOR hardware to realize option-C interconnection. No TOR hardware modification solution must be provided. But for future case, we can propose extra hardware requirements for TORs.
> The other options requires baggage forever on the ASBR elements that does not bring value and it is better to avoid this and build an architecture which is future proof and more cost effective. My 2 cents
>>
>> -Thomas
>
>>
>> Zhuangshunwan  :
>>>
>>> Hi Diego,
>>>
>>> Thanks for your comments. Pls see inline with [Vincent].
>>>
>>> Vincent
>>>
>>> *发件人:*BESS [mailto:bess-bounces@ietf.org] *代表 *Diego Garcia del Rio
>>> *发送时间:*2015年11月18日14:25
>>> *收件人:*bess@ietf.org
>>> *主题:*Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>>
>>> Some comments from my side,
>>> I think the draft makes quite a few assumptions on specific
>>> implementation details that are way too general to be considered
>>> widely available.
>>> Most of the TOR devices today already pay a double-pass penalty when
>>> doing routing of traffic in/out of vxlan-type tunnels. Only the newest
>>> generation can route into tunnels without additional passes. And are
>>> definitively limited in being able to arbitrary select UDP ports on a
>>> per tunnel basis. In fact, most are even limited at using more than
>>> one VNID per "service" of sorts.
>>> [Vincent]: Yes, the new generation BCM chipset has already supported
>>> VXLAN routing without additional passes. For OVS/TOR, VXLAN
>>> encapsulation is more popular than MPLSoGRE/UDP, and has better
>>> performance.
>>> The IP-addressed based implementation which would, I assume, imply
>>> assigning one or more CIDRs to a loopback interface on the ASBR-d is
>>> also quite arbitrary and does not seem like a technically "clean"
>>> solution. (besides burning tons of IPs). As a side-note, most PE-grade
>>> routers i've worked with were quite limited in terms of IP addresses
>>> used for tunnel termination and it wasn't that just a simple pool can
>>> be used.
>>> [Vincent]: I think the larger VTEP IP address range on ASBR-d has no
>>> limitations. For the hardware on ASBR-d, it has capability to
>>> terminate multiple VXLAN tunnels with arbitrary destination VTEP IP
>>> addresses.
>>> Wim's mentions on cases where the Application itself, hosted in a
>>> datacenter, would be part of the option-C interconnect, was dismissed
>>> without much discussion so far, while, if we look in detail at the
>>> type of users which will even consider a complex topology like model-C
>>> its most likely users and operators very familiar with MPLS VPNs in
>>> the WAN. Those type of operators will most likely be very interested
>>> in deploying MPLS or WAN-grade applications (i.e., virtual-routers or
>>> other VNFs) in the DC and thus its highly likely that the interconnect
>>> would not terminate at the NVE itself but rather the TS (the virtual
>>> machine).
>>> Also, the use of UDP ports at random would imply quite complex logic
>>> on the ASBR-d IMHO. Im not saying its impossible, but since the
>>> received packet now not only has to be received on a random (though
>>> locally chosen) UDP port and this information preserved in the
>>> pipeline to be able to do the double-tunnel-stitching, it sounds quite
>>> complex. I am sure someone in the list will mention this has already
>>> been implemented somewhere, and I won't argue with that. And let's not
>>> even bring into account what this would do to any DC middlebox that
>>> now has to look at vxlan over almost any random port. We have to go
>>> back to the "is it a 4 or is it a 6 in byte x" heuristics to try to
>>> guess whether the packet is vxlan or just something entirely different
>>> running over IP.
>>> [Vincent]: Using NP or multi-core CPU hardware technology, it can be
>>> implemented although deeper packet inspection is needed to perform UDP
>>> port and MPLS stitching.
>>> In general I feel the proposed solution seems to be fitting of a
>>> specific use-case which is not really detailed in the draft and does
>>> not describe   a solution that would "elegantly" solve the issues at
>>> hand. It just feels like we're using any available bit-space to stuff
>>> data into places that do not necesarily belong.
>>> Yes, MPLS encapsulations on virtual switches are not yet fully
>>> available, and there can be some performance penalty on the TORs, but
>>> the solutions are much cleaner from a control and data plane point of
>>> view. Maybe I'm too utopic.
>>> [Vincent]: I think pure VXLAN solution has its scenario, it's general
>>> rather than specific. We can't require all OVS/NVEs support VXLAN +
>>> MPLSoGRE at the same time.
>>> Best regards,
>>> Diego
>>> ---------------------------------------------------------------------------------
>>> Hi,
>>> The problem we are trying to solve is to reduce data center
>>> GW/ASBR-d's forwarding table size, the motivation is same as
>>> traditional MPLS VPN option-C. Currently, the most common practise on
>>> ASBR-d is to terminate VXLAN encapsulation, look up local routing
>>> table, and then perform MPLS encapsulation to the WAN network. ASBR-d
>>> needs to maintain all VM's MAC/IP. In Option-C method, only transport
>>> layer information needed to be maintained at GW/ASBR-d, the
>>> scalability will be greatly enhanced. Traditonal Option-C is only for
>>> MPLS VPN network interworking, because VXLAN is becoming pervasive in
>>> data center,  the solution in this draft was proposed for the
>>> heterogeneous network interworking.
>>> The advantage of this solution is that only VXLAN encapsulation is
>>> required for OVS/TOR. Unlike Wim's solution, east-west bound traffic
>>> uses VXLAN encap, while north-south bound traffic uses MPLSoGRE/UDP encap.
>>> There are two solutions in this draft:
>>> 1. Using VXLAN tunnel destination IP for stitching at ASBR-d.
>>> No data plane modification requirements on OVS or TOR switches, only
>>> hardware changes on ASBR-d. ASBR-d normally is router, it has
>>> capability to realize the hardware changes. It will consume many IP
>>> addresses and the IP pool for allocation needs to be configured on
>>> ASBR-d beforehand.
>>> 2. Using VXLAN destination UDP port for stitching at ASBR-d.
>>> Compared with solution 1, less IP address will be consumed for
>>> allocation. If UDP port range is too large, we can combine with
>>> solution 1 and 2.
>>> In this solution, both data plane modification changes are needed at
>>> OVS/TOR and ASBR-d. ASBR-d also has capability to realize the hardware
>>> changes. For OVS, it also can realize the data plane changes. For TOR
>>> switch, it normally can't realize this function.  This solution mainly
>>> focuses on pure software based overlay network, it has more
>>> scalability. In public cloud data center, software based overlay
>>> network is the majority case.
>>> Whether using solution 1 or 2 depends on the operators real envionment.
>>> So I think our solution has no flaws, it works fine.
>>> Thanks,
>>> weiguo
>>> ________________________________
>>> From: BESS [bess-bounces@ietf.org <mailto:bess-bounces@ietf.org>] on
>>> behalf of John E Drake [jdrake@juniper.net <mailto:jdrake@juniper.net>]
>>> Sent: Wednesday, November 18, 2015 2:49
>>> To: Henderickx, Wim (Wim); EXT - thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com>; BESS
>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>> Hi,
>>> I think Wim has conclusively demonstrated that this draft has fatal
>>> flaws and I don’t support it.  I also agree with his suggestion that
>>> we first figure out what problem we are trying to solve before solving it.
>>> Yours Irrespectively,
>>> John
>>> From: BESS [mailto:bess-bounces@ietf.org
>>> <mailto:bess-bounces@ietf.org>] On Behalf Of Henderickx, Wim (Wim)
>>> Sent: Tuesday, November 17, 2015 12:49 PM
>>> To: EXT - thomas.morin@orange.com <mailto:thomas.morin@orange.com>; BESS
>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>> — Snip —
>>> No, the spec as it is can be implemented in its VXLAN variant with
>>> existing vswitches (e.g. OVS allows to choose the VXLAN destination
>>> port, ditto for the linux kernel stack).
>>> (ToR is certainly another story, most of them not having a flexible
>>> enough VXLAN dataplane nor support for any MPLS-over-IP.)
>>> WH> and how many ports simultaneously would they support? For this to
>>> work every tenant needs a different VXLAN UDP destination port/receive
>>> port.
>>> There might be SW elements that could do some of this, but IETF
>>> defines solutions which should be implemented across the board
>>> HW/SW/etc. Even if some SW switches can do this, the proposal will
>>> impose so many issues in HW/data-plane engines that I cannot be behind
>>> this solution.
>>> To make this work generically we will have to make changes anyhow.
>>> Given this, we better do it in the right way and guide the industry to
>>> a solution which does not imply those complexities. Otherwise we will
>>> stick with these specials forever with all consequences (bugs, etc).
>>> - snip -
>>> From: "thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com>>" <thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com>>>
>>> Organization: Orange
>>> Date: Tuesday 17 November 2015 at 01:37
>>> To: Wim Henderickx <wim.henderickx@alcatel-lucent.com
>>> <mailto:wim.henderickx@alcatel-lucent.com><mailto:wim.henderickx@alcatel-lucent.com
>>> <mailto:wim.henderickx@alcatel-lucent.com>>>, BESS <bess@ietf.org
>>> <mailto:bess@ietf.org><mailto:bess@ietf.org <mailto:bess@ietf.org>>>
>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>> Hi Wim, WG,
>>> 2015-11-16, Henderickx, Wim (Wim):
>>> 2015-11-13, Henderickx, Wim (Wim):
>>> Thomas, we can discuss forever and someone need to describe
>>> requirements, but the current proposal I cannot agree to for the
>>> reasons explained.
>>> TM> Well, although discussing forever is certainly not the goal, the
>>> reasons for rejecting a proposal need to be thoroughly understood.
>>> WH> my point is what is the real driver for supporting a plain VXLAN
>>> data-plane here, the use cases I have seen in this txt is always where
>>> an application behind a NVE/TOR is demanding option c, but none of the
>>> NVE/TOR elements.
>>> My understanding is that the applications  are contexts where overlays
>>> are present is when workloads (VMs or baremetal) need to be
>>> interconnected with VPNs. In these contexts, there can be reasons to
>>> want Option C to reduce the state on ASBRs.
>>> In these context, its not the workload (VM or baremetal) that would
>>> typically handle VRFs, but really the vswitch or ToR.
>>> WH2> can it not be all cases: TOR/vswitch/Application. I would make
>>> the solution flexible to support all of these not?
>>> 2015-11-13, Henderickx, Wim (Wim):
>>> TM> The right trade-off to make may in fact depend on whether you prefer:
>>> (a) a new dataplane stitching behavior on DC ASBRs (the behavior
>>> specified in this draft)
>>> or (b) an evolution of the encaps on the vswitches and ToRs to support
>>> MPLS/MPLS/(UDP or GRE)
>>> WH> b depends on the use case
>>> I don't get what you mean by "b depends on the use case".
>>> WH> see my above comment. If the real use case is an application
>>> behind NVE/TOR requiring model C, than all the discussion on impact on
>>> NVE/TOR is void. As such I want to have a discussion on the real
>>> driver/requirement for option c interworking with an IP based Fabric.
>>> Although I can agree than detailing requirements can always help, I
>>> don't think one can assume a certain application to dismiss the proposal.
>>> WH> for me the proposal is not acceptable for the reasons explained:
>>> too much impact on the data-planes
>>> I wrote the above based on the idea that the encap used in
>>> MPLS/MPLS/(UDP or GRE), which hence has to be supported on the ToRs
>>> and vswitches.
>>> Another possibility would be service-label/middle-label/Ethernet
>>> assuming an L2 adjacency between vswitches/ToRs and ASBRs, but this
>>> certainly does not match your typical DC architecture. Or perhaps had
>>> you something else in mind ?
>>> WH> see above. The draft right now also requires changes in existing
>>> TOR/NVE so for me all this discussion/debate is void.
>>> No, the spec as it is can be implemented in its VXLAN variant with
>>> existing vswitches (e.g. OVS allows to choose the VXLAN destination
>>> port, ditto for the linux kernel stack).
>>> (ToR is certainly another story, most of them not having a flexible
>>> enough VXLAN dataplane nor support for any MPLS-over-IP.)
>>> WH> and how many ports simultaneously would they support?
>>> WH> and depending on implementation you don’t need to change any of
>>> the TOR/vswitches.
>>> Does this mean that for some implementations you may not need to
>>> change any of the TOR/vswitches, but that for some others you may ?
>>> WH> any proposal on the table requires changes, so for me this is not
>>> a valid discussion
>>> See above, the proposal in the draft does not necessarily need changes
>>> in vswitches.
>>> Let me take a practical example : while I can quite easily see how to
>>> implement the procedures in draft-hao-bess-inter-nvo3-vpn-optionc
>>> based on current vswitch implementations of VXLAN, the lack of
>>> MPLS/MPLS/(UDP, GRE) support in commonplace vswitches seems to me as
>>> making that alternate solution you suggest harder to implement.
>>> WH> I would disagree to this. Tell me which switch/TOR handles
>>> multiple UDP ports for VXLAN ?
>>> I mentioned _v_switches, and many do support a variable destination
>>> port for VXLAN, which is sufficient to implement what the draft proposes.
>>> -Thomas
>>> From: Thomas Morin <thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com>>>
>>> Organization: Orange
>>> Date: Friday 13 November 2015 at 09:57
>>> To: Wim Henderickx <wim.henderickx@alcatel-lucent.com
>>> <mailto:wim.henderickx@alcatel-lucent.com><mailto:wim.henderickx@alcatel-lucent.com
>>> <mailto:wim.henderickx@alcatel-lucent.com>>>
>>> Cc: "bess@ietf.org <mailto:bess@ietf.org><mailto:bess@ietf.org
>>> <mailto:bess@ietf.org>>" <bess@ietf.org
>>> <mailto:bess@ietf.org><mailto:bess@ietf.org <mailto:bess@ietf.org>>>
>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>> Hi Wim,
>>> I agree on the analysis that this proposal is restricted to
>>> implementations that supports the chosen encap with non-IANA ports
>>> (which may be hard to achieve for instance on hardware
>>> implementations, as you suggest), or to context where managing
>>> multiple IPs would be operationally viable.
>>> However, it does not seem obvious to me how the alternative you
>>> propose [relying on 3-label option C with an MPLS/MPLS/(UDP|GRE)
>>> encap] addresses the issue of whether the encap behavior is supported
>>> or not (e.g. your typical ToR chipset possibly may not support this
>>> kind of encap,  and even software-based switches may not be ready to
>>> support that today).
>>> My take is that having different options to adapt to various
>>> implementations constraints we may have would have value.
>>> (+ one question below on VXLAN...)
>>> -Thomas
>>> 2015-11-12, Henderickx, Wim (Wim):
>>> On VXLAN/NVGRE, do you challenge the fact that they would be used with
>>> a dummy MAC address that would be replaced by the right MAC by a
>>> sender based on an ARP request when needed ?
>>> Is the above the issue you had in mind about VXLAN and NVGRE ?
>>> WH> yes
>>> I you don't mind me asking : why do you challenge that ?
>>>
>>
>> _______________________________________________
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>> https://www.ietf.org/mailman/listinfo/bess
> _______________________________________________
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>


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From: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>
To: "thomas.morin@orange.com" <thomas.morin@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Date: Fri, 20 Nov 2015 13:27:18 +0000
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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To: Haoweiguo <haoweiguo@huawei.com>, Thomas Morin <thomas.morin@orange.com>,  "bess@ietf.org" <bess@ietf.org>
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From: Lucy yong <lucy.yong@huawei.com>
To: "thomas.morin@orange.com" <thomas.morin@orange.com>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Date: Fri, 20 Nov 2015 16:48:53 +0000
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From: John E Drake <jdrake@juniper.net>
To: Lucy yong <lucy.yong@huawei.com>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Archived-At: <http://mailarchive.ietf.org/arch/msg/bess/duPFWiAizcY1yY7yzo02T4Y2NHc>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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From: Lucy yong <lucy.yong@huawei.com>
To: John E Drake <jdrake@juniper.net>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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To: John E Drake <jdrake@juniper.net>, Lucy yong <lucy.yong@huawei.com>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
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From: <thomas.morin@orange.com>
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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2015-11-20, John E Drake:
> That presupposes that the group likes either of the two proposed solutions in your draft.

John, I think Lucy's "two solutions" was referring to 
draft-hao-bess-inter-nvo3-vpn-optionc solution and the 3-label Optionc 
MPLS/MPLS/UDP solution described by Wim.

-Thomas



>
>> -----Original Message-----
>> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Lucy yong
>> Sent: Friday, November 20, 2015 11:49 AM
>> To: EXT - thomas.morin@orange.com; Henderickx, Wim (Wim);
>> bess@ietf.org
>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>
>> Share my 2 cent.
>>
>> Cloud providers want to tunnel its customer traffic through DC (AS)BR.
>> Option C is a way to realize it. Both solutions summarized by Thomas have no
>> change on WAN VPN side and seamlessly work with WAN VPN option C.
>> However, to support either solution, DC has to do some enhancement on DC
>> BR or ToR switch, etc, which dictates to different implementations within a
>> DC. Option C pro and con remains regardless what implementation is used in
>> a DC.
>>
>> Two solutions should not coexist in one DC (does not make a sense), but it
>> does not matter if one DC operator prefers to use one solution and another
>> DC prefers to use another solution. Since there are many cloud providers
>> today, it is worth for the WG to document both solutions and point out the
>> implementation requirements on impacted components. Then, up to
>> vendors and operators to select a solution for their DC.
>>
>> It does not make a sense for us to vote which solution is better here because
>> a better solution for a DC depends on many factors.
>>
>>
>> Lucy
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of
>> thomas.morin@orange.com
>> Sent: Friday, November 20, 2015 3:02 AM
>> To: Henderickx, Wim (Wim); bess@ietf.org
>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>
>> 2015-11-19, Henderickx, Wim (Wim):
>>> WH> I vote for a an evolution of switches/TORs that have proper
>>> support for this. I hope some HW vendors of TOR chips shime in, but I
>>> am told the MPLS solution is possible in the next generation chips
>>> they are working on.
>>
>> Well, it looks like the key questions are:
>> - when would ToR chips support MPLS/MPLS/UDP ?  (the generation that has
>> been released recently but not present in most shipping ToRs yet, the next
>> one ?)
>> - do we want an interim VXLAN-based solution ? (that will involve at best a
>> performance penalty with existing chips, and at worse impossible to
>> implement -- we haven't seen clear information in this thread)
>>
>> -Thomas
>>
>>
>>>> Zhuangshunwan  :
>>>>>
>>>>> Hi Diego,
>>>>>
>>>>> Thanks for your comments. Pls see inline with [Vincent].
>>>>>
>>>>> Vincent
>>>>>
>>>>> *发件人:*BESS [mailto:bess-bounces@ietf.org] *代表 *Diego Garcia
>> del Rio
>>>>> *发送时间:*2015年11月18日14:25 *收件人:*bess@ietf.org *主题
>> :*Re: [bess]
>>>>> draft-hao-bess-inter-nvo3-vpn-optionc
>>>>>
>>>>> Some comments from my side, I think the draft makes quite a few
>>>>> assumptions on specific implementation details that are way too
>>>>> general to be considered widely available. Most of the TOR devices
>>>>> today already pay a double-pass penalty when doing routing of
>>>>> traffic in/out of vxlan-type tunnels. Only the newest generation can
>>>>> route into tunnels without additional passes. And are definitively
>>>>> limited in being able to arbitrary select UDP ports on a per tunnel
>>>>> basis. In fact, most are even limited at using more than one VNID
>>>>> per "service" of sorts. [Vincent]: Yes, the new generation BCM
>>>>> chipset has already supported VXLAN routing without additional
>>>>> passes. For OVS/TOR, VXLAN encapsulation is more popular than
>>>>> MPLSoGRE/UDP, and has better performance. The IP-addressed based
>>>>> implementation which would, I assume, imply assigning one or more
>>>>> CIDRs to a loopback interface on the ASBR-d is also quite arbitrary
>>>>> and does not seem like a technically "clean" solution. (besides
>>>>> burning tons of IPs). As a side-note, most PE-grade routers i've
>>>>> worked with were quite limited in terms of IP addresses used for
>>>>> tunnel termination and it wasn't that just a simple pool can be
>>>>> used. [Vincent]: I think the larger VTEP IP address range on ASBR-d
>>>>> has no limitations.
>>>>> For the hardware on ASBR-d, it has capability to terminate multiple
>>>>> VXLAN tunnels with arbitrary destination VTEP IP addresses. Wim's
>>>>> mentions on cases where the Application itself, hosted in a
>>>>> datacenter, would be part of the option-C interconnect, was
>>>>> dismissed without much discussion so far, while, if we look in
>>>>> detail at the type of users which will even consider a complex
>>>>> topology like model-C its most likely users and operators very
>>>>> familiar with MPLS VPNs in the WAN. Those type of operators will
>>>>> most likely be very interested in deploying MPLS or WAN-grade
>>>>> applications (i.e., virtual-routers or other
>>>>> VNFs) in the DC and thus its highly likely that the interconnect
>>>>> would not terminate at the NVE itself but rather the TS (the virtual
>>>>> machine). Also, the use of UDP ports at random would imply quite
>>>>> complex logic on the ASBR-d IMHO. Im not saying its impossible, but
>>>>> since the received packet now not only has to be received on a
>>>>> random (though locally chosen) UDP port and this information
>>>>> preserved in the pipeline to be able to do the
>>>>> double-tunnel-stitching, it sounds quite complex. I am sure someone
>>>>> in the list will mention this has already been implemented
>>>>> somewhere, and I won't argue with that. And let's not even bring
>>>>> into account what this would do to any DC middlebox that now has to
>>>>> look at vxlan over almost any random port. We have to go back to the
>>>>> "is it a 4 or is it a 6 in byte x" heuristics to try to guess
>>>>> whether the packet is vxlan or just something entirely different
>>>>> running over IP. [Vincent]: Using NP or multi-core CPU hardware
>>>>> technology, it can be implemented although deeper packet inspection
>>>>> is needed to perform UDP port and MPLS stitching. In general I feel
>>>>> the proposed solution seems to be fitting of a specific use-case
>>>>> which is not really detailed
>>>>> in the draft and does not describe   a solution that would
>>>>> "elegantly" solve the issues at hand. It just feels like we're using
>>>>> any available bit-space to stuff data into places that do not
>>>>> necesarily belong. Yes, MPLS encapsulations on virtual switches are
>>>>> not yet fully available, and there can be some performance penalty
>>>>> on the TORs, but the solutions are much cleaner from a control and
>>>>> data plane point of view. Maybe I'm too utopic. [Vincent]: I think
>>>>> pure VXLAN solution has its scenario, it's general rather than
>>>>> specific. We can't require all OVS/NVEs support VXLAN + MPLSoGRE at
>>>>> the same time. Best regards, Diego
>>>>> --------------------------------------------------------------------
>>>>> -------------
>>>>>
>>>>>
>> Hi,
>>>>> The problem we are trying to solve is to reduce data center
>>>>> GW/ASBR-d's forwarding table size, the motivation is same as
>>>>> traditional MPLS VPN option-C. Currently, the most common practise
>>>>> on ASBR-d is to terminate VXLAN encapsulation, look up local routing
>>>>> table, and then perform MPLS encapsulation to the WAN network.
>>>>> ASBR-d needs to maintain all VM's MAC/IP. In Option-C method, only
>>>>> transport layer information needed to be maintained at GW/ASBR-d,
>>>>> the scalability will be greatly enhanced. Traditonal Option-C is
>>>>> only for MPLS VPN network interworking, because VXLAN is becoming
>>>>> pervasive in data center, the solution in this draft was proposed
>>>>> for the heterogeneous network interworking. The advantage of this
>>>>> solution is that only VXLAN encapsulation is required for OVS/TOR.
>>>>> Unlike Wim's solution, east-west bound traffic uses VXLAN encap,
>>>>> while north-south bound traffic uses MPLSoGRE/UDP encap. There are
>>>>> two solutions in this draft: 1. Using VXLAN tunnel destination IP
>>>>> for stitching at ASBR-d. No data plane modification requirements on
>>>>> OVS or TOR switches, only hardware changes on ASBR-d. ASBR-d
>>>>> normally is router, it has capability to realize the hardware
>>>>> changes. It will consume many IP addresses and the IP pool for
>>>>> allocation needs to be configured on ASBR-d beforehand. 2. Using
>>>>> VXLAN destination UDP port for stitching at ASBR-d. Compared with
>>>>> solution 1, less IP address will be consumed for allocation. If UDP
>>>>> port range is too large, we can combine with solution 1 and 2. In
>>>>> this solution, both data plane modification changes are needed at
>>>>> OVS/TOR and ASBR-d. ASBR-d also has capability to realize the
>>>>> hardware changes. For OVS, it also can realize the data plane
>>>>> changes. For TOR switch, it normally can't realize this function.
>>>>> This solution mainly focuses on pure software based overlay network,
>>>>> it has more scalability. In public cloud data center, software based
>>>>> overlay network is the majority case. Whether using solution 1 or 2
>>>>> depends on the operators real envionment. So I think our solution
>>>>> has no flaws, it works fine.
>>>>> Thanks, weiguo ________________________________ From: BESS
>>>>> [bess-bounces@ietf.org <mailto:bess-bounces@ietf.org>] on behalf of
>>>>> John E Drake [jdrake@juniper.net <mailto:jdrake@juniper.net>]
>>>>> Sent: Wednesday, November 18, 2015 2:49 To: Henderickx, Wim (Wim);
>>>>> EXT - thomas.morin@orange.com <mailto:thomas.morin@orange.com>;
>> BESS
>>>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc Hi, I
>>>>> think Wim has conclusively demonstrated that this draft has fatal
>>>>> flaws and I don’t support it.  I also agree with his suggestion that
>>>>> we first figure out what problem we are trying to solve before
>>>>> solving it. Yours Irrespectively, John From: BESS
>>>>> [mailto:bess-bounces@ietf.org <mailto:bess-bounces@ietf.org>] On
>>>>> Behalf Of Henderickx, Wim (Wim) Sent: Tuesday, November 17, 2015
>>>>> 12:49 PM To: EXT - thomas.morin@orange.com
>>>>> <mailto:thomas.morin@orange.com>; BESS Subject: Re: [bess]
>>>>> draft-hao-bess-inter-nvo3-vpn-optionc — Snip — No, the spec as it is
>>>>> can be implemented in its VXLAN variant with existing vswitches
>>>>> (e.g. OVS allows to choose the VXLAN destination port, ditto for the
>>>>> linux kernel stack). (ToR is certainly another story, most of them
>>>>> not having a flexible enough VXLAN dataplane nor support for any
>>>>> MPLS-over-IP.) WH> and how many ports simultaneously would they
>>>>> support? For this to work every tenant needs a different VXLAN UDP
>>>>> destination port/receive port. There might be SW elements that could
>>>>> do some of this, but IETF defines solutions which should be
>>>>> implemented across the board HW/SW/etc.
>>>>> Even if some SW switches can do this, the proposal will impose so
>>>>> many issues in HW/data-plane engines that I cannot be behind this
>>>>> solution. To make this work generically we will have to make changes
>>>>> anyhow. Given this, we better do it in the right way and guide the
>>>>> industry to a solution which does not imply those complexities.
>>>>> Otherwise we will stick with these specials forever with all
>>>>> consequences (bugs, etc). - snip - From:
>>>>> "thomas.morin@orange.com
>>>>>
>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>>>> <mailto:thomas.morin@orange.com>>" <thomas.morin@orange.com
>>>>>
>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>>>> <mailto:thomas.morin@orange.com>>> Organization: Orange Date:
>>>>> Tuesday 17 November 2015 at 01:37 To: Wim Henderickx
>>>>> <wim.henderickx@alcatel-lucent.com
>>>>> <mailto:wim.henderickx@alcatel-
>> lucent.com><mailto:wim.henderickx@alc
>>>>> atel-lucent.com
>>>>>
>>>>>
>> <mailto:wim.henderickx@alcatel-lucent.com>>>, BESS <bess@ietf.org
>>>>> <mailto:bess@ietf.org><mailto:bess@ietf.org
>>>>> <mailto:bess@ietf.org>>> Subject: Re: [bess]
>>>>> draft-hao-bess-inter-nvo3-vpn-optionc Hi Wim, WG, 2015-11-16,
>>>>> Henderickx, Wim (Wim): 2015-11-13, Henderickx, Wim (Wim): Thomas,
>> we
>>>>> can discuss forever and someone need to describe requirements, but
>>>>> the current proposal I cannot agree to for the reasons explained.
>>>>> TM> Well, although discussing forever is certainly not the goal, the
>>>>> reasons for rejecting a proposal need to be thoroughly understood.
>>>>> WH> my point is what is the real driver for supporting a plain VXLAN
>>>>> data-plane here, the use cases I have seen in this txt is always
>>>>> where an application behind a NVE/TOR is demanding option c, but
>>>>> none of the NVE/TOR elements.
>>>>> My understanding is that the applications  are contexts where
>>>>> overlays are present is when workloads (VMs or baremetal) need to be
>>>>> interconnected with VPNs. In these contexts, there can be reasons to
>>>>> want Option C to reduce the state on ASBRs. In these context, its
>>>>> not the workload (VM or baremetal) that would typically handle VRFs,
>>>>> but really the vswitch or ToR. WH2> can it not be all cases:
>>>>> TOR/vswitch/Application. I would make the solution flexible to
>>>>> support all of these not? 2015-11-13, Henderickx, Wim (Wim): TM> The
>>>>> right trade-off to make may in fact depend on whether you prefer:
>>>>> (a) a new dataplane stitching behavior on DC ASBRs (the behavior
>>>>> specified in this draft) or
>>>>> (b) an evolution of the encaps on the vswitches and ToRs to support
>>>>> MPLS/MPLS/(UDP or GRE) WH> b depends on the use case I don't get
>>>>> what you mean by "b depends on the use case". WH> see my above
>>>>> comment. If the real use case is an application behind NVE/TOR
>>>>> requiring model C, than all the discussion on impact on NVE/TOR is
>>>>> void. As such I want to have a discussion on the real
>>>>> driver/requirement for option c interworking with an IP based
>>>>> Fabric. Although I can agree than detailing requirements can always
>>>>> help, I don't think one can assume a certain application to dismiss
>>>>> the proposal. WH> for me the proposal is not acceptable for the
>>>>> reasons explained: too much impact on the data-planes I wrote the
>>>>> above based on the idea that the encap used in MPLS/MPLS/(UDP or
>>>>> GRE), which hence has to be supported on the ToRs and vswitches.
>>>>> Another possibility would be service-label/middle-label/Ethernet
>>>>> assuming an L2 adjacency between vswitches/ToRs and ASBRs, but this
>>>>> certainly does not match your typical DC architecture. Or perhaps
>>>>> had you something else in mind ? WH> see above. The draft right now
>>>>> also requires changes in existing TOR/NVE so for me all this
>>>>> discussion/debate is void. No, the spec as it is can be implemented
>>>>> in its VXLAN variant with existing vswitches (e.g. OVS allows to
>>>>> choose the VXLAN destination port, ditto for the linux kernel
>>>>> stack). (ToR is certainly another story, most of them not having a
>>>>> flexible enough VXLAN dataplane nor support for any MPLS-over-IP.)
>>>>> WH> and how many ports simultaneously would they support? WH> and
>>>>> depending on implementation you don’t need to change any of the
>>>>> TOR/vswitches. Does this mean that for some implementations you may
>>>>> not need to change any of the TOR/vswitches, but that for some
>>>>> others you may ? WH> any proposal on the table requires changes, so
>>>>> for me this is not a valid discussion See above, the proposal in the
>>>>> draft does not necessarily need changes in vswitches. Let me take a
>>>>> practical example : while I can quite easily see how to implement
>>>>> the procedures in draft-hao-bess-inter-nvo3-vpn-optionc based on
>>>>> current vswitch implementations of VXLAN, the lack of
>>>>> MPLS/MPLS/(UDP, GRE) support in commonplace vswitches seems to
>> me as
>>>>> making that alternate solution you suggest harder to implement. WH>
>>>>> I would disagree to this. Tell me which switch/TOR handles multiple
>>>>> UDP ports for VXLAN ? I mentioned _v_switches, and many do support a
>>>>> variable destination port for VXLAN, which is sufficient to
>>>>> implement what the draft proposes. -Thomas From: Thomas Morin
>>>>> <thomas.morin@orange.com
>>>>>
>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>>>> <mailto:thomas.morin@orange.com>>> Organization: Orange Date:
>>>>> Friday 13 November 2015 at 09:57 To: Wim Henderickx
>>>>> <wim.henderickx@alcatel-lucent.com
>>>>> <mailto:wim.henderickx@alcatel-
>> lucent.com><mailto:wim.henderickx@alc
>>>>> atel-lucent.com
>>>>>
>>>>>
>> <mailto:wim.henderickx@alcatel-lucent.com>>>
>>>>> Cc: "bess@ietf.org <mailto:bess@ietf.org><mailto:bess@ietf.org
>>>>> <mailto:bess@ietf.org>>" <bess@ietf.org
>>>>> <mailto:bess@ietf.org><mailto:bess@ietf.org
>>>>> <mailto:bess@ietf.org>>> Subject: Re: [bess]
>>>>> draft-hao-bess-inter-nvo3-vpn-optionc Hi Wim, I agree on the
>>>>> analysis that this proposal is restricted to implementations that
>>>>> supports the chosen encap with non-IANA ports (which may be hard to
>>>>> achieve for instance on hardware implementations, as you suggest),
>>>>> or to context where managing multiple IPs would be operationally
>>>>> viable. However, it does not seem obvious to me how the alternative
>>>>> you propose [relying on 3-label option C with an
>>>>> MPLS/MPLS/(UDP|GRE) encap] addresses the issue of whether the
>> encap
>>>>> behavior is supported or not (e.g. your typical ToR chipset possibly
>>>>> may not support this kind of encap,  and even software-based
>>>>> switches may not be ready to support that today).
>>>>> My take is that having different options to adapt to various
>>>>> implementations constraints we may have would have value. (+ one
>>>>> question below on VXLAN...) -Thomas 2015-11-12, Henderickx, Wim
>>>>> (Wim): On VXLAN/NVGRE, do you challenge the fact that they would be
>>>>> used with a dummy MAC address that would be replaced by the right
>>>>> MAC by a sender based on an ARP request when needed ? Is the above
>>>>> the issue you had in mind about VXLAN and NVGRE ? WH> yes I you
>>>>> don't mind me asking : why do you challenge that ?
>>>>>
>>
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>> __________________________________________________________
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From nehalbhau@gmail.com  Fri Nov 20 08:19:27 2015
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From: Nehal Bhau <nehalbhau@gmail.com>
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Subject: Re: [bess] draft-morin-bess-mvpn-fast-failover
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Besides the below IPR, I am not aware of any other IP related to the draft.

https://datatracker.ietf.org/ipr/2697/

https://datatracker.ietf.org/ipr/2696/

Thanks,

-Nehal

--001a11c39c4e2bae840524fb3d08
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small"><p =
style=3D"font-size:13.6px;line-height:16pt;background-image:initial;backgro=
und-repeat:initial"><span style=3D"font-size:11pt;font-family:Calibri,sans-=
serif"><font color=3D"#000000">Besides the below IPR, I am not aware of any=
 other IP related to the draft.</font></span></p><p style=3D"font-size:13.6=
px;line-height:16pt;background-image:initial;background-repeat:initial"><sp=
an style=3D"color:rgb(68,68,68)"><a href=3D"https://datatracker.ietf.org/ip=
r/2697/" target=3D"_blank"><span style=3D"font-size:10.5pt;font-family:Cons=
olas;color:rgb(0,104,207)">https://datatracker.ietf.org/ipr/2697/</span></a=
></span><span style=3D"font-size:11.5pt;font-family:Calibri,sans-serif;colo=
r:rgb(68,68,68)"></span></p><p style=3D"font-size:13.6px;line-height:16pt;b=
ackground-image:initial;background-repeat:initial"><span style=3D"font-size=
:10.5pt;font-family:Consolas;color:rgb(0,104,207)"><a href=3D"https://datat=
racker.ietf.org/ipr/2696/" target=3D"_blank">https://datatracker.ietf.org/i=
pr/2696/</a></span></p><p style=3D"font-size:13.6px;line-height:16pt;backgr=
ound-image:initial;background-repeat:initial"><span style=3D"font-size:10.5=
pt;font-family:Consolas"><font color=3D"#000000">Thanks,</font></span></p><=
p style=3D"font-size:13.6px;line-height:16pt;background-image:initial;backg=
round-repeat:initial"><span style=3D"font-size:10.5pt;font-family:Consolas"=
><font color=3D"#000000">-Nehal</font></span></p><p style=3D"font-size:13.6=
px;line-height:16pt;background-image:initial;background-repeat:initial"><br=
></p></div></div>

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From nobody Fri Nov 20 09:19:26 2015
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From: John E Drake <jdrake@juniper.net>
To: "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, Lucy yong <lucy.yong@huawei.com>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
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From: "UTTARO, JAMES" <ju1738@att.com>
To: John E Drake <jdrake@juniper.net>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, Lucy yong <lucy.yong@huawei.com>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
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Archived-At: <http://mailarchive.ietf.org/arch/msg/bess/qb_35FqKkSC8laFWaS6PaSUBfM8>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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From: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>
To: "UTTARO, JAMES" <ju1738@att.com>, John E Drake <jdrake@juniper.net>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, Lucy yong <lucy.yong@huawei.com>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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From: Lucy yong <lucy.yong@huawei.com>
To: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, "bess@ietf.org" <bess@ietf.org>
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Lucy,

there is no such thing as voting in IETF WGs
And I haven't seen anything like voting as part of this discussion.

Thank you
Martin

Le 20/11/2015 20:57, Lucy yong a écrit :
> IMHO: voting on this thread does not make a sense. Both solutions will work and scales.
>
> Lucy
>
> -----Original Message-----
> From: Rabadan, Jorge (Jorge) [mailto:jorge.rabadan@alcatel-lucent.com]
> Sent: Friday, November 20, 2015 1:32 PM
> To: UTTARO, JAMES; John E Drake; EXT - thomas.morin@orange.com; Lucy yong; Henderickx, Wim (Wim); bess@ietf.org
> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>
> IMHO if TOR chip vendors can confirm they are seriously looking at MPLS/MPLS/UDP, Wim’s suggestion makes all the sense since we know it works and scales.
> My 2 cents.
>
> Jorge
>
>
>
> On 11/20/15, 9:51 AM, "BESS on behalf of UTTARO, JAMES" <bess-bounces@ietf.org on behalf of ju1738@att.com> wrote:
>
>> +1
>>
>> -----Original Message-----
>> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of John E Drake
>> Sent: Friday, November 20, 2015 12:19 PM
>> To: EXT - thomas.morin@orange.com; Lucy yong; Henderickx, Wim (Wim);
>> bess@ietf.org
>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>
>> Lucy,
>>
>> My apologies, I misunderstood.
>>
>> I think we have to accept the fact that we will have to deal with a multiplicity of different encapsulations in the data plane along a packet's e2e path and that we should take a more measured approach to deciding how to deal with this in a general and extensible way before accepting any solutions.
>>
>> Yours Irrespectively,
>>
>> John
>>
>>> -----Original Message-----
>>> From: thomas.morin@orange.com [mailto:thomas.morin@orange.com]
>>> Sent: Friday, November 20, 2015 12:04 PM
>>> To: John E Drake; Lucy yong; Henderickx, Wim (Wim); bess@ietf.org
>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>>
>>> 2015-11-20, John E Drake:
>>>> That presupposes that the group likes either of the two proposed
>>>> solutions
>>> in your draft.
>>>
>>> John, I think Lucy's "two solutions" was referring to
>>> draft-hao-bess-inter- nvo3-vpn-optionc solution and the 3-label
>>> Optionc MPLS/MPLS/UDP solution described by Wim.
>>>
>>> -Thomas
>>>
>>>
>>>
>>>>
>>>>> -----Original Message-----
>>>>> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Lucy yong
>>>>> Sent: Friday, November 20, 2015 11:49 AM
>>>>> To: EXT - thomas.morin@orange.com; Henderickx, Wim (Wim);
>>>>> bess@ietf.org
>>>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>>>>
>>>>> Share my 2 cent.
>>>>>
>>>>> Cloud providers want to tunnel its customer traffic through DC (AS)BR.
>>>>> Option C is a way to realize it. Both solutions summarized by
>>>>> Thomas have no change on WAN VPN side and seamlessly work with WAN
>>>>> VPN
>>> option C.
>>>>> However, to support either solution, DC has to do some enhancement
>>>>> on DC BR or ToR switch, etc, which dictates to different
>>>>> implementations within a DC. Option C pro and con remains
>>>>> regardless what implementation is used in a DC.
>>>>>
>>>>> Two solutions should not coexist in one DC (does not make a
>>>>> sense), but it does not matter if one DC operator prefers to use
>>>>> one solution and another DC prefers to use another solution. Since
>>>>> there are many cloud providers today, it is worth for the WG to
>>>>> document both solutions and point out the implementation
>>>>> requirements on impacted components. Then, up to vendors and
>>>>> operators to select a solution for
>>> their DC.
>>>>>
>>>>> It does not make a sense for us to vote which solution is better
>>>>> here because a better solution for a DC depends on many factors.
>>>>>
>>>>>
>>>>> Lucy
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> -----Original Message-----
>>>>> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of
>>>>> thomas.morin@orange.com
>>>>> Sent: Friday, November 20, 2015 3:02 AM
>>>>> To: Henderickx, Wim (Wim); bess@ietf.org
>>>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>>>>
>>>>> 2015-11-19, Henderickx, Wim (Wim):
>>>>>> WH> I vote for a an evolution of switches/TORs that have proper
>>>>>> support for this. I hope some HW vendors of TOR chips shime in,
>>>>>> but I am told the MPLS solution is possible in the next
>>>>>> generation chips they are working on.
>>>>>
>>>>> Well, it looks like the key questions are:
>>>>> - when would ToR chips support MPLS/MPLS/UDP ?  (the generation
>>>>> that has been released recently but not present in most shipping
>>>>> ToRs yet, the next one ?)
>>>>> - do we want an interim VXLAN-based solution ? (that will involve
>>>>> at best a performance penalty with existing chips, and at worse
>>>>> impossible to implement -- we haven't seen clear information in
>>>>> this
>>>>> thread)
>>>>>
>>>>> -Thomas
>>>>>
>>>>>
>>>>>>> Zhuangshunwan  :
>>>>>>>>
>>>>>>>> Hi Diego,
>>>>>>>>
>>>>>>>> Thanks for your comments. Pls see inline with [Vincent].
>>>>>>>>
>>>>>>>> Vincent
>>>>>>>>
>>>>>>>> *发件人:*BESS [mailto:bess-bounces@ietf.org] *代表 *Diego Garcia
>>>>> del Rio
>>>>>>>> *发送时间:*2015年11月18日14:25 *收件人:*bess@ietf.org *主题
>>>>> :*Re: [bess]
>>>>>>>> draft-hao-bess-inter-nvo3-vpn-optionc
>>>>>>>>
>>>>>>>> Some comments from my side, I think the draft makes quite a few
>>>>>>>> assumptions on specific implementation details that are way too
>>>>>>>> general to be considered widely available. Most of the TOR
>>>>>>>> devices today already pay a double-pass penalty when doing
>>>>>>>> routing of traffic in/out of vxlan-type tunnels. Only the
>>>>>>>> newest generation can route into tunnels without additional
>>>>>>>> passes. And are definitively limited in being able to arbitrary
>>>>>>>> select UDP ports on a per tunnel basis. In fact, most are even
>>>>>>>> limited at using more than one VNID per "service" of sorts.
>>>>>>>> [Vincent]: Yes, the new generation BCM chipset has already
>>>>>>>> supported VXLAN routing
>>> without
>>>>>>>> additional passes. For OVS/TOR, VXLAN encapsulation is more
>>>>>>>> popular than MPLSoGRE/UDP, and has better performance. The
>>>>>>>> IP-addressed based implementation which would, I assume, imply
>>>>>>>> assigning one or more CIDRs to a loopback interface on the
>>>>>>>> ASBR-d is also quite arbitrary and does not seem like a
>>>>>>>> technically "clean" solution. (besides burning tons of IPs). As
>>>>>>>> a side-note, most PE-grade routers i've worked with were quite
>>>>>>>> limited in terms of IP addresses used for tunnel termination
>>>>>>>> and it wasn't that just a simple pool can be used. [Vincent]: I
>>>>>>>> think the larger VTEP IP address range on ASBR-d has no limitations.
>>>>>>>> For the hardware on ASBR-d, it has capability to terminate
>>>>>>>> multiple VXLAN tunnels with arbitrary destination VTEP IP
>>>>>>>> addresses. Wim's mentions on cases where the Application
>>>>>>>> itself, hosted in a datacenter, would be part of the option-C
>>>>>>>> interconnect, was dismissed without much discussion so far,
>>>>>>>> while, if we look in detail at the type of users which will
>>>>>>>> even consider a complex topology like model-C its most likely
>>>>>>>> users and operators very familiar with MPLS VPNs in the WAN.
>>>>>>>> Those type of operators will most likely be very interested in
>>>>>>>> deploying MPLS or WAN-grade applications (i.e., virtual-routers
>>>>>>>> or other
>>>>>>>> VNFs) in the DC and thus its highly likely that the
>>>>>>>> interconnect would not terminate at the NVE itself but rather
>>>>>>>> the TS (the virtual machine). Also, the use of UDP ports at
>>>>>>>> random would imply quite complex logic on the ASBR-d IMHO. Im
>>>>>>>> not saying its impossible, but since the received packet now
>>>>>>>> not only has to be received on a random (though locally chosen)
>>>>>>>> UDP port and this information preserved in the pipeline to be
>>>>>>>> able to do the double-tunnel-stitching, it sounds quite
>>>>>>>> complex. I am sure someone in the list will mention this has
>>>>>>>> already been implemented somewhere, and I won't argue with
>>>>>>>> that. And let's not even bring into account what this would do
>>>>>>>> to any DC middlebox that now has to look at vxlan over almost
>>>>>>>> any random port. We have to go back to the "is it a 4 or is it
>>>>>>>> a 6 in byte x" heuristics to try to guess whether the packet is
>>>>>>>> vxlan or just something entirely different running over IP.
>>>>>>>> [Vincent]: Using NP or multi-core CPU hardware technology, it
>>>>>>>> can be implemented although deeper packet inspection is needed
>>>>>>>> to perform UDP port and MPLS stitching. In general I feel the
>>>>>>>> proposed solution seems to be fitting of a specific use-case which is not really detailed
>>>>>>>> in the draft and does not describe   a solution that would
>>>>>>>> "elegantly" solve the issues at hand. It just feels like we're
>>>>>>>> using any available bit-space to stuff data into places that do
>>>>>>>> not necesarily belong. Yes, MPLS encapsulations on virtual
>>>>>>>> switches are not yet fully available, and there can be some
>>>>>>>> performance penalty on the TORs, but the solutions are much
>>>>>>>> cleaner from a control and data plane point of view. Maybe I'm
>>>>>>>> too utopic. [Vincent]: I think pure VXLAN solution has its
>>>>>>>> scenario, it's general rather than specific. We can't require
>>>>>>>> all OVS/NVEs support VXLAN + MPLSoGRE at the same time. Best
>>>>>>>> regards, Diego
>>>>>>>> ---------------------------------------------------------------
>>>>>>>> ---
>>>>>>>> --
>>>>>>>> -------------
>>>>>>>>
>>>>>>>>
>>>>> Hi,
>>>>>>>> The problem we are trying to solve is to reduce data center
>>>>>>>> GW/ASBR-d's forwarding table size, the motivation is same as
>>>>>>>> traditional MPLS VPN option-C. Currently, the most common
>>>>>>>> practise on ASBR-d is to terminate VXLAN encapsulation, look up
>>>>>>>> local routing table, and then perform MPLS encapsulation to the
>>>>>>>> WAN
>>> network.
>>>>>>>> ASBR-d needs to maintain all VM's MAC/IP. In Option-C method,
>>>>>>>> only transport layer information needed to be maintained at
>>>>>>>> GW/ASBR-d, the scalability will be greatly enhanced. Traditonal
>>>>>>>> Option-C is only for MPLS VPN network interworking, because
>>>>>>>> VXLAN is
>>> becoming
>>>>>>>> pervasive in data center, the solution in this draft was
>>>>>>>> proposed for the heterogeneous network interworking. The
>>>>>>>> advantage of this solution is that only VXLAN encapsulation is required for OVS/TOR.
>>>>>>>> Unlike Wim's solution, east-west bound traffic uses VXLAN
>>>>>>>> encap, while north-south bound traffic uses MPLSoGRE/UDP encap.
>>>>>>>> There
>>> are
>>>>>>>> two solutions in this draft: 1. Using VXLAN tunnel destination
>>>>>>>> IP for stitching at ASBR-d. No data plane modification
>>>>>>>> requirements on OVS or TOR switches, only hardware changes on
>>>>>>>> ASBR-d. ASBR-d normally is router, it has capability to realize
>>>>>>>> the hardware changes. It will consume many IP addresses and the
>>>>>>>> IP pool for allocation needs to be configured on ASBR-d
>>>>>>>> beforehand. 2. Using VXLAN destination UDP port for stitching
>>>>>>>> at ASBR-d. Compared with solution 1, less IP address will be
>>>>>>>> consumed for allocation. If UDP port range is too large, we can combine with solution 1 and 2.
>>>>>>>> In this solution, both data plane modification changes are
>>>>>>>> needed at OVS/TOR and ASBR-d. ASBR-d also has capability to
>>>>>>>> realize the hardware changes. For OVS, it also can realize the
>>>>>>>> data plane changes. For TOR switch, it normally can't realize this function.
>>>>>>>> This solution mainly focuses on pure software based overlay
>>>>>>>> network, it has more scalability. In public cloud data center,
>>>>>>>> software based overlay network is the majority case. Whether
>>>>>>>> using solution 1 or 2 depends on the operators real envionment.
>>>>>>>> So I think our solution has no flaws, it works fine.
>>>>>>>> Thanks, weiguo ________________________________ From: BESS
>>>>>>>> [bess-bounces@ietf.org <mailto:bess-bounces@ietf.org>] on
>>>>>>>> behalf of John E Drake [jdrake@juniper.net
>>>>>>>> <mailto:jdrake@juniper.net>]
>>>>>>>> Sent: Wednesday, November 18, 2015 2:49 To: Henderickx, Wim
>>> (Wim);
>>>>>>>> EXT - thomas.morin@orange.com
>>> <mailto:thomas.morin@orange.com>;
>>>>> BESS
>>>>>>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc Hi, I
>>>>>>>> think Wim has conclusively demonstrated that this draft has
>>>>>>>> fatal flaws and I don’t support it.  I also agree with his
>>>>>>>> suggestion that we first figure out what problem we are trying
>>>>>>>> to solve before solving it. Yours Irrespectively, John From:
>>>>>>>> BESS [mailto:bess-bounces@ietf.org
>>>>>>>> <mailto:bess-bounces@ietf.org>] On Behalf Of Henderickx, Wim
>>>>>>>> (Wim) Sent: Tuesday, November 17, 2015
>>>>>>>> 12:49 PM To: EXT - thomas.morin@orange.com
>>>>>>>> <mailto:thomas.morin@orange.com>; BESS Subject: Re: [bess]
>>>>>>>> draft-hao-bess-inter-nvo3-vpn-optionc — Snip — No, the spec as
>>>>>>>> it is can be implemented in its VXLAN variant with existing
>>>>>>>> vswitches (e.g. OVS allows to choose the VXLAN destination
>>>>>>>> port, ditto for the linux kernel stack). (ToR is certainly
>>>>>>>> another story, most of them not having a flexible enough VXLAN
>>>>>>>> dataplane nor support for any
>>>>>>>> MPLS-over-IP.) WH> and how many ports simultaneously would they
>>>>>>>> support? For this to work every tenant needs a different VXLAN
>>>>>>>> UDP destination port/receive port. There might be SW elements
>>>>>>>> that could do some of this, but IETF defines solutions which
>>>>>>>> should be implemented across the board HW/SW/etc.
>>>>>>>> Even if some SW switches can do this, the proposal will impose
>>>>>>>> so many issues in HW/data-plane engines that I cannot be behind
>>>>>>>> this solution. To make this work generically we will have to
>>>>>>>> make changes anyhow. Given this, we better do it in the right
>>>>>>>> way and guide the industry to a solution which does not imply
>>>>>>>> those
>>> complexities.
>>>>>>>> Otherwise we will stick with these specials forever with all
>>>>>>>> consequences (bugs, etc). - snip - From:
>>>>>>>> "thomas.morin@orange.com
>>>>>>>>
>>>>>
>>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>>>>>>> <mailto:thomas.morin@orange.com>>" <thomas.morin@orange.com
>>>>>>>>
>>>>>
>>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>>>>>>> <mailto:thomas.morin@orange.com>>> Organization: Orange Date:
>>>>>>>> Tuesday 17 November 2015 at 01:37 To: Wim Henderickx
>>>>>>>> <wim.henderickx@alcatel-lucent.com
>>>>>>>> <mailto:wim.henderickx@alcatel-
>>>>> lucent.com><mailto:wim.henderickx@alc
>>>>>>>> atel-lucent.com
>>>>>>>>
>>>>>>>>
>>>>> <mailto:wim.henderickx@alcatel-lucent.com>>>, BESS <bess@ietf.org
>>>>>>>> <mailto:bess@ietf.org><mailto:bess@ietf.org
>>>>>>>> <mailto:bess@ietf.org>>> Subject: Re: [bess]
>>>>>>>> draft-hao-bess-inter-nvo3-vpn-optionc Hi Wim, WG, 2015-11-16,
>>>>>>>> Henderickx, Wim (Wim): 2015-11-13, Henderickx, Wim (Wim):
>>> Thomas,
>>>>> we
>>>>>>>> can discuss forever and someone need to describe requirements,
>>>>>>>> but the current proposal I cannot agree to for the reasons explained.
>>>>>>>> TM> Well, although discussing forever is certainly not the
>>>>>>>> TM> goal, the
>>>>>>>> reasons for rejecting a proposal need to be thoroughly understood.
>>>>>>>> WH> my point is what is the real driver for supporting a plain
>>>>>>>> WH> VXLAN
>>>>>>>> data-plane here, the use cases I have seen in this txt is
>>>>>>>> always where an application behind a NVE/TOR is demanding
>>>>>>>> option c, but none of the NVE/TOR elements.
>>>>>>>> My understanding is that the applications  are contexts where
>>>>>>>> overlays are present is when workloads (VMs or baremetal) need
>>>>>>>> to be interconnected with VPNs. In these contexts, there can be
>>>>>>>> reasons to want Option C to reduce the state on ASBRs. In these
>>>>>>>> context, its not the workload (VM or baremetal) that would
>>>>>>>> typically handle VRFs, but really the vswitch or ToR. WH2> can
>>>>>>>> it not
>>> be all cases:
>>>>>>>> TOR/vswitch/Application. I would make the solution flexible to
>>>>>>>> support all of these not? 2015-11-13, Henderickx, Wim (Wim):
>>>>>>>> TM> The right trade-off to make may in fact depend on whether
>>>>>>>> you
>>> prefer:
>>>>>>>> (a) a new dataplane stitching behavior on DC ASBRs (the
>>>>>>>> behavior specified in this draft) or
>>>>>>>> (b) an evolution of the encaps on the vswitches and ToRs to
>>>>>>>> support MPLS/MPLS/(UDP or GRE) WH> b depends on the use case I
>>>>>>>> don't get what you mean by "b depends on the use case". WH> see
>>> my
>>>>>>>> above comment. If the real use case is an application behind
>>>>>>>> NVE/TOR requiring model C, than all the discussion on impact on
>>>>>>>> NVE/TOR is void. As such I want to have a discussion on the
>>>>>>>> real driver/requirement for option c interworking with an IP
>>>>>>>> based Fabric. Although I can agree than detailing requirements
>>>>>>>> can always help, I don't think one can assume a certain
>>>>>>>> application to dismiss the proposal. WH> for me the proposal is
>>>>>>>> not acceptable for the reasons explained: too much impact on
>>>>>>>> the data-planes I wrote the above based on the idea that the
>>>>>>>> encap used in MPLS/MPLS/(UDP or GRE), which hence has to be
>>>>>>>> supported on the
>>> ToRs and vswitches.
>>>>>>>> Another possibility would be
>>>>>>>> service-label/middle-label/Ethernet
>>>>>>>> assuming an L2 adjacency between vswitches/ToRs and ASBRs, but
>>>>>>>> this certainly does not match your typical DC architecture. Or
>>>>>>>> perhaps had you something else in mind ? WH> see above. The
>>>>>>>> draft right now also requires changes in existing TOR/NVE so
>>>>>>>> for me all this discussion/debate is void. No, the spec as it
>>>>>>>> is can be implemented in its VXLAN variant with existing
>>>>>>>> vswitches (e.g. OVS allows to choose the VXLAN destination
>>>>>>>> port, ditto for the linux kernel stack). (ToR is certainly
>>>>>>>> another story, most of them not having a flexible enough VXLAN
>>>>>>>> dataplane nor support for any
>>>>>>>> MPLS-over-IP.)
>>>>>>>> WH> and how many ports simultaneously would they support? WH>
>>> and
>>>>>>>> depending on implementation you don’t need to change any of the
>>>>>>>> TOR/vswitches. Does this mean that for some implementations you
>>>>>>>> may not need to change any of the TOR/vswitches, but that for
>>>>>>>> some others you may ? WH> any proposal on the table requires
>>>>>>>> changes, so for me this is not a valid discussion See above,
>>>>>>>> the proposal in the draft does not necessarily need changes in
>>>>>>>> vswitches. Let me take a practical example : while I can quite
>>>>>>>> easily see how to implement the procedures in
>>>>>>>> draft-hao-bess-inter-nvo3-vpn-optionc
>>>>>>>> based on current vswitch implementations of VXLAN, the lack of
>>>>>>>> MPLS/MPLS/(UDP, GRE) support in commonplace vswitches seems to
>>>>> me as
>>>>>>>> making that alternate solution you suggest harder to implement.
>>>>>>>> WH> I would disagree to this. Tell me which switch/TOR handles
>>>>>>>> multiple UDP ports for VXLAN ? I mentioned _v_switches, and
>>>>>>>> many do support a variable destination port for VXLAN, which is
>>>>>>>> sufficient to implement what the draft proposes. -Thomas From:
>>>>>>>> Thomas Morin <thomas.morin@orange.com
>>>>>>>>
>>>>>
>>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>>>>>>> <mailto:thomas.morin@orange.com>>> Organization: Orange Date:
>>>>>>>> Friday 13 November 2015 at 09:57 To: Wim Henderickx
>>>>>>>> <wim.henderickx@alcatel-lucent.com
>>>>>>>> <mailto:wim.henderickx@alcatel-
>>>>> lucent.com><mailto:wim.henderickx@alc
>>>>>>>> atel-lucent.com
>>>>>>>>
>>>>>>>>
>>>>> <mailto:wim.henderickx@alcatel-lucent.com>>>
>>>>>>>> Cc: "bess@ietf.org <mailto:bess@ietf.org><mailto:bess@ietf.org
>>>>>>>> <mailto:bess@ietf.org>>" <bess@ietf.org
>>>>>>>> <mailto:bess@ietf.org><mailto:bess@ietf.org
>>>>>>>> <mailto:bess@ietf.org>>> Subject: Re: [bess]
>>>>>>>> draft-hao-bess-inter-nvo3-vpn-optionc Hi Wim, I agree on the
>>>>>>>> analysis that this proposal is restricted to implementations
>>>>>>>> that supports the chosen encap with non-IANA ports (which may
>>>>>>>> be hard to achieve for instance on hardware implementations, as
>>>>>>>> you suggest), or to context where managing multiple IPs would
>>>>>>>> be operationally viable. However, it does not seem obvious to
>>>>>>>> me how the alternative you propose [relying on 3-label option C
>>>>>>>> with an
>>>>>>>> MPLS/MPLS/(UDP|GRE) encap] addresses the issue of whether the
>>>>> encap
>>>>>>>> behavior is supported or not (e.g. your typical ToR chipset
>>>>>>>> possibly may not support this kind of encap,  and even
>>>>>>>> software-based switches may not be ready to support that today).
>>>>>>>> My take is that having different options to adapt to various
>>>>>>>> implementations constraints we may have would have value. (+
>>>>>>>> one question below on VXLAN...) -Thomas 2015-11-12, Henderickx,
>>>>>>>> Wim
>>>>>>>> (Wim): On VXLAN/NVGRE, do you challenge the fact that they
>>>>>>>> would be used with a dummy MAC address that would be replaced
>>>>>>>> by the right MAC by a sender based on an ARP request when
>>>>>>>> needed ? Is the above the issue you had in mind about VXLAN and
>>>>>>>> NVGRE ? WH> yes I you don't mind me asking : why do you challenge that ?
>>>>>>>>
>>>>>
>>>>>
>>> __________________________________________________________
>>>>>
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From: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>
To: Lucy yong <lucy.yong@huawei.com>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, "bess@ietf.org" <bess@ietf.org>
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From: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>
To: Haoweiguo <haoweiguo@huawei.com>, "sajassi@cisco.com" <sajassi@cisco.com>
Thread-Topic: [bess] One question about Route-type2 usage in EVPN base protocol
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Subject: Re: [bess] One question about Route-type2 usage in EVPN base protocol
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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Lucy,

Thanks for your clarification.
Yet, the fact that two solutions need not interwork does not render 
useless a debate on the merits of each.

-m

Le 20/11/2015 21:36, Lucy yong a écrit :
> Martin,
>
> Sorry not to express my mind precisely.
>
> I mean to say, debating which solution is a better solution here does not make a sense. There is no need for the two solutions interwork.
>
> Regards,
> Lucy
>
> -----Original Message-----
> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Martin Vigoureux
> Sent: Friday, November 20, 2015 2:13 PM
> To: bess@ietf.org
> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>
> Lucy,
>
> there is no such thing as voting in IETF WGs And I haven't seen anything like voting as part of this discussion.
>
> Thank you
> Martin
>
> Le 20/11/2015 20:57, Lucy yong a écrit :
>> IMHO: voting on this thread does not make a sense. Both solutions will work and scales.
>>
>> Lucy
>>
>> -----Original Message-----
>> From: Rabadan, Jorge (Jorge) [mailto:jorge.rabadan@alcatel-lucent.com]
>> Sent: Friday, November 20, 2015 1:32 PM
>> To: UTTARO, JAMES; John E Drake; EXT - thomas.morin@orange.com; Lucy
>> yong; Henderickx, Wim (Wim); bess@ietf.org
>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>
>> IMHO if TOR chip vendors can confirm they are seriously looking at MPLS/MPLS/UDP, Wim’s suggestion makes all the sense since we know it works and scales.
>> My 2 cents.
>>
>> Jorge
>>
>>
>>
>> On 11/20/15, 9:51 AM, "BESS on behalf of UTTARO, JAMES" <bess-bounces@ietf.org on behalf of ju1738@att.com> wrote:
>>
>>> +1
>>>
>>> -----Original Message-----
>>> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of John E Drake
>>> Sent: Friday, November 20, 2015 12:19 PM
>>> To: EXT - thomas.morin@orange.com; Lucy yong; Henderickx, Wim (Wim);
>>> bess@ietf.org
>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>>
>>> Lucy,
>>>
>>> My apologies, I misunderstood.
>>>
>>> I think we have to accept the fact that we will have to deal with a multiplicity of different encapsulations in the data plane along a packet's e2e path and that we should take a more measured approach to deciding how to deal with this in a general and extensible way before accepting any solutions.
>>>
>>> Yours Irrespectively,
>>>
>>> John
>>>
>>>> -----Original Message-----
>>>> From: thomas.morin@orange.com [mailto:thomas.morin@orange.com]
>>>> Sent: Friday, November 20, 2015 12:04 PM
>>>> To: John E Drake; Lucy yong; Henderickx, Wim (Wim); bess@ietf.org
>>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>>>
>>>> 2015-11-20, John E Drake:
>>>>> That presupposes that the group likes either of the two proposed
>>>>> solutions
>>>> in your draft.
>>>>
>>>> John, I think Lucy's "two solutions" was referring to
>>>> draft-hao-bess-inter- nvo3-vpn-optionc solution and the 3-label
>>>> Optionc MPLS/MPLS/UDP solution described by Wim.
>>>>
>>>> -Thomas
>>>>
>>>>
>>>>
>>>>>
>>>>>> -----Original Message-----
>>>>>> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Lucy yong
>>>>>> Sent: Friday, November 20, 2015 11:49 AM
>>>>>> To: EXT - thomas.morin@orange.com; Henderickx, Wim (Wim);
>>>>>> bess@ietf.org
>>>>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>>>>>
>>>>>> Share my 2 cent.
>>>>>>
>>>>>> Cloud providers want to tunnel its customer traffic through DC (AS)BR.
>>>>>> Option C is a way to realize it. Both solutions summarized by
>>>>>> Thomas have no change on WAN VPN side and seamlessly work with WAN
>>>>>> VPN
>>>> option C.
>>>>>> However, to support either solution, DC has to do some enhancement
>>>>>> on DC BR or ToR switch, etc, which dictates to different
>>>>>> implementations within a DC. Option C pro and con remains
>>>>>> regardless what implementation is used in a DC.
>>>>>>
>>>>>> Two solutions should not coexist in one DC (does not make a
>>>>>> sense), but it does not matter if one DC operator prefers to use
>>>>>> one solution and another DC prefers to use another solution. Since
>>>>>> there are many cloud providers today, it is worth for the WG to
>>>>>> document both solutions and point out the implementation
>>>>>> requirements on impacted components. Then, up to vendors and
>>>>>> operators to select a solution for
>>>> their DC.
>>>>>>
>>>>>> It does not make a sense for us to vote which solution is better
>>>>>> here because a better solution for a DC depends on many factors.
>>>>>>
>>>>>>
>>>>>> Lucy
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> -----Original Message-----
>>>>>> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of
>>>>>> thomas.morin@orange.com
>>>>>> Sent: Friday, November 20, 2015 3:02 AM
>>>>>> To: Henderickx, Wim (Wim); bess@ietf.org
>>>>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
>>>>>>
>>>>>> 2015-11-19, Henderickx, Wim (Wim):
>>>>>>> WH> I vote for a an evolution of switches/TORs that have proper
>>>>>>> support for this. I hope some HW vendors of TOR chips shime in,
>>>>>>> but I am told the MPLS solution is possible in the next
>>>>>>> generation chips they are working on.
>>>>>>
>>>>>> Well, it looks like the key questions are:
>>>>>> - when would ToR chips support MPLS/MPLS/UDP ?  (the generation
>>>>>> that has been released recently but not present in most shipping
>>>>>> ToRs yet, the next one ?)
>>>>>> - do we want an interim VXLAN-based solution ? (that will involve
>>>>>> at best a performance penalty with existing chips, and at worse
>>>>>> impossible to implement -- we haven't seen clear information in
>>>>>> this
>>>>>> thread)
>>>>>>
>>>>>> -Thomas
>>>>>>
>>>>>>
>>>>>>>> Zhuangshunwan  :
>>>>>>>>>
>>>>>>>>> Hi Diego,
>>>>>>>>>
>>>>>>>>> Thanks for your comments. Pls see inline with [Vincent].
>>>>>>>>>
>>>>>>>>> Vincent
>>>>>>>>>
>>>>>>>>> *发件人:*BESS [mailto:bess-bounces@ietf.org] *代表 *Diego Garcia
>>>>>> del Rio
>>>>>>>>> *发送时间:*2015年11月18日14:25 *收件人:*bess@ietf.org *主题
>>>>>> :*Re: [bess]
>>>>>>>>> draft-hao-bess-inter-nvo3-vpn-optionc
>>>>>>>>>
>>>>>>>>> Some comments from my side, I think the draft makes quite a few
>>>>>>>>> assumptions on specific implementation details that are way too
>>>>>>>>> general to be considered widely available. Most of the TOR
>>>>>>>>> devices today already pay a double-pass penalty when doing
>>>>>>>>> routing of traffic in/out of vxlan-type tunnels. Only the
>>>>>>>>> newest generation can route into tunnels without additional
>>>>>>>>> passes. And are definitively limited in being able to arbitrary
>>>>>>>>> select UDP ports on a per tunnel basis. In fact, most are even
>>>>>>>>> limited at using more than one VNID per "service" of sorts.
>>>>>>>>> [Vincent]: Yes, the new generation BCM chipset has already
>>>>>>>>> supported VXLAN routing
>>>> without
>>>>>>>>> additional passes. For OVS/TOR, VXLAN encapsulation is more
>>>>>>>>> popular than MPLSoGRE/UDP, and has better performance. The
>>>>>>>>> IP-addressed based implementation which would, I assume, imply
>>>>>>>>> assigning one or more CIDRs to a loopback interface on the
>>>>>>>>> ASBR-d is also quite arbitrary and does not seem like a
>>>>>>>>> technically "clean" solution. (besides burning tons of IPs). As
>>>>>>>>> a side-note, most PE-grade routers i've worked with were quite
>>>>>>>>> limited in terms of IP addresses used for tunnel termination
>>>>>>>>> and it wasn't that just a simple pool can be used. [Vincent]: I
>>>>>>>>> think the larger VTEP IP address range on ASBR-d has no limitations.
>>>>>>>>> For the hardware on ASBR-d, it has capability to terminate
>>>>>>>>> multiple VXLAN tunnels with arbitrary destination VTEP IP
>>>>>>>>> addresses. Wim's mentions on cases where the Application
>>>>>>>>> itself, hosted in a datacenter, would be part of the option-C
>>>>>>>>> interconnect, was dismissed without much discussion so far,
>>>>>>>>> while, if we look in detail at the type of users which will
>>>>>>>>> even consider a complex topology like model-C its most likely
>>>>>>>>> users and operators very familiar with MPLS VPNs in the WAN.
>>>>>>>>> Those type of operators will most likely be very interested in
>>>>>>>>> deploying MPLS or WAN-grade applications (i.e., virtual-routers
>>>>>>>>> or other
>>>>>>>>> VNFs) in the DC and thus its highly likely that the
>>>>>>>>> interconnect would not terminate at the NVE itself but rather
>>>>>>>>> the TS (the virtual machine). Also, the use of UDP ports at
>>>>>>>>> random would imply quite complex logic on the ASBR-d IMHO. Im
>>>>>>>>> not saying its impossible, but since the received packet now
>>>>>>>>> not only has to be received on a random (though locally chosen)
>>>>>>>>> UDP port and this information preserved in the pipeline to be
>>>>>>>>> able to do the double-tunnel-stitching, it sounds quite
>>>>>>>>> complex. I am sure someone in the list will mention this has
>>>>>>>>> already been implemented somewhere, and I won't argue with
>>>>>>>>> that. And let's not even bring into account what this would do
>>>>>>>>> to any DC middlebox that now has to look at vxlan over almost
>>>>>>>>> any random port. We have to go back to the "is it a 4 or is it
>>>>>>>>> a 6 in byte x" heuristics to try to guess whether the packet is
>>>>>>>>> vxlan or just something entirely different running over IP.
>>>>>>>>> [Vincent]: Using NP or multi-core CPU hardware technology, it
>>>>>>>>> can be implemented although deeper packet inspection is needed
>>>>>>>>> to perform UDP port and MPLS stitching. In general I feel the
>>>>>>>>> proposed solution seems to be fitting of a specific use-case which is not really detailed
>>>>>>>>> in the draft and does not describe   a solution that would
>>>>>>>>> "elegantly" solve the issues at hand. It just feels like we're
>>>>>>>>> using any available bit-space to stuff data into places that do
>>>>>>>>> not necesarily belong. Yes, MPLS encapsulations on virtual
>>>>>>>>> switches are not yet fully available, and there can be some
>>>>>>>>> performance penalty on the TORs, but the solutions are much
>>>>>>>>> cleaner from a control and data plane point of view. Maybe I'm
>>>>>>>>> too utopic. [Vincent]: I think pure VXLAN solution has its
>>>>>>>>> scenario, it's general rather than specific. We can't require
>>>>>>>>> all OVS/NVEs support VXLAN + MPLSoGRE at the same time. Best
>>>>>>>>> regards, Diego
>>>>>>>>> ---------------------------------------------------------------
>>>>>>>>> ---
>>>>>>>>> --
>>>>>>>>> -------------
>>>>>>>>>
>>>>>>>>>
>>>>>> Hi,
>>>>>>>>> The problem we are trying to solve is to reduce data center
>>>>>>>>> GW/ASBR-d's forwarding table size, the motivation is same as
>>>>>>>>> traditional MPLS VPN option-C. Currently, the most common
>>>>>>>>> practise on ASBR-d is to terminate VXLAN encapsulation, look up
>>>>>>>>> local routing table, and then perform MPLS encapsulation to the
>>>>>>>>> WAN
>>>> network.
>>>>>>>>> ASBR-d needs to maintain all VM's MAC/IP. In Option-C method,
>>>>>>>>> only transport layer information needed to be maintained at
>>>>>>>>> GW/ASBR-d, the scalability will be greatly enhanced. Traditonal
>>>>>>>>> Option-C is only for MPLS VPN network interworking, because
>>>>>>>>> VXLAN is
>>>> becoming
>>>>>>>>> pervasive in data center, the solution in this draft was
>>>>>>>>> proposed for the heterogeneous network interworking. The
>>>>>>>>> advantage of this solution is that only VXLAN encapsulation is required for OVS/TOR.
>>>>>>>>> Unlike Wim's solution, east-west bound traffic uses VXLAN
>>>>>>>>> encap, while north-south bound traffic uses MPLSoGRE/UDP encap.
>>>>>>>>> There
>>>> are
>>>>>>>>> two solutions in this draft: 1. Using VXLAN tunnel destination
>>>>>>>>> IP for stitching at ASBR-d. No data plane modification
>>>>>>>>> requirements on OVS or TOR switches, only hardware changes on
>>>>>>>>> ASBR-d. ASBR-d normally is router, it has capability to realize
>>>>>>>>> the hardware changes. It will consume many IP addresses and the
>>>>>>>>> IP pool for allocation needs to be configured on ASBR-d
>>>>>>>>> beforehand. 2. Using VXLAN destination UDP port for stitching
>>>>>>>>> at ASBR-d. Compared with solution 1, less IP address will be
>>>>>>>>> consumed for allocation. If UDP port range is too large, we can combine with solution 1 and 2.
>>>>>>>>> In this solution, both data plane modification changes are
>>>>>>>>> needed at OVS/TOR and ASBR-d. ASBR-d also has capability to
>>>>>>>>> realize the hardware changes. For OVS, it also can realize the
>>>>>>>>> data plane changes. For TOR switch, it normally can't realize this function.
>>>>>>>>> This solution mainly focuses on pure software based overlay
>>>>>>>>> network, it has more scalability. In public cloud data center,
>>>>>>>>> software based overlay network is the majority case. Whether
>>>>>>>>> using solution 1 or 2 depends on the operators real envionment.
>>>>>>>>> So I think our solution has no flaws, it works fine.
>>>>>>>>> Thanks, weiguo ________________________________ From: BESS
>>>>>>>>> [bess-bounces@ietf.org <mailto:bess-bounces@ietf.org>] on
>>>>>>>>> behalf of John E Drake [jdrake@juniper.net
>>>>>>>>> <mailto:jdrake@juniper.net>]
>>>>>>>>> Sent: Wednesday, November 18, 2015 2:49 To: Henderickx, Wim
>>>> (Wim);
>>>>>>>>> EXT - thomas.morin@orange.com
>>>> <mailto:thomas.morin@orange.com>;
>>>>>> BESS
>>>>>>>>> Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc Hi, I
>>>>>>>>> think Wim has conclusively demonstrated that this draft has
>>>>>>>>> fatal flaws and I don’t support it.  I also agree with his
>>>>>>>>> suggestion that we first figure out what problem we are trying
>>>>>>>>> to solve before solving it. Yours Irrespectively, John From:
>>>>>>>>> BESS [mailto:bess-bounces@ietf.org
>>>>>>>>> <mailto:bess-bounces@ietf.org>] On Behalf Of Henderickx, Wim
>>>>>>>>> (Wim) Sent: Tuesday, November 17, 2015
>>>>>>>>> 12:49 PM To: EXT - thomas.morin@orange.com
>>>>>>>>> <mailto:thomas.morin@orange.com>; BESS Subject: Re: [bess]
>>>>>>>>> draft-hao-bess-inter-nvo3-vpn-optionc — Snip — No, the spec as
>>>>>>>>> it is can be implemented in its VXLAN variant with existing
>>>>>>>>> vswitches (e.g. OVS allows to choose the VXLAN destination
>>>>>>>>> port, ditto for the linux kernel stack). (ToR is certainly
>>>>>>>>> another story, most of them not having a flexible enough VXLAN
>>>>>>>>> dataplane nor support for any
>>>>>>>>> MPLS-over-IP.) WH> and how many ports simultaneously would they
>>>>>>>>> support? For this to work every tenant needs a different VXLAN
>>>>>>>>> UDP destination port/receive port. There might be SW elements
>>>>>>>>> that could do some of this, but IETF defines solutions which
>>>>>>>>> should be implemented across the board HW/SW/etc.
>>>>>>>>> Even if some SW switches can do this, the proposal will impose
>>>>>>>>> so many issues in HW/data-plane engines that I cannot be behind
>>>>>>>>> this solution. To make this work generically we will have to
>>>>>>>>> make changes anyhow. Given this, we better do it in the right
>>>>>>>>> way and guide the industry to a solution which does not imply
>>>>>>>>> those
>>>> complexities.
>>>>>>>>> Otherwise we will stick with these specials forever with all
>>>>>>>>> consequences (bugs, etc). - snip - From:
>>>>>>>>> "thomas.morin@orange.com
>>>>>>>>>
>>>>>>
>>>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>>>>>>>> <mailto:thomas.morin@orange.com>>" <thomas.morin@orange.com
>>>>>>>>>
>>>>>>
>>>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>>>>>>>> <mailto:thomas.morin@orange.com>>> Organization: Orange Date:
>>>>>>>>> Tuesday 17 November 2015 at 01:37 To: Wim Henderickx
>>>>>>>>> <wim.henderickx@alcatel-lucent.com
>>>>>>>>> <mailto:wim.henderickx@alcatel-
>>>>>> lucent.com><mailto:wim.henderickx@alc
>>>>>>>>> atel-lucent.com
>>>>>>>>>
>>>>>>>>>
>>>>>> <mailto:wim.henderickx@alcatel-lucent.com>>>, BESS <bess@ietf.org
>>>>>>>>> <mailto:bess@ietf.org><mailto:bess@ietf.org
>>>>>>>>> <mailto:bess@ietf.org>>> Subject: Re: [bess]
>>>>>>>>> draft-hao-bess-inter-nvo3-vpn-optionc Hi Wim, WG, 2015-11-16,
>>>>>>>>> Henderickx, Wim (Wim): 2015-11-13, Henderickx, Wim (Wim):
>>>> Thomas,
>>>>>> we
>>>>>>>>> can discuss forever and someone need to describe requirements,
>>>>>>>>> but the current proposal I cannot agree to for the reasons explained.
>>>>>>>>> TM> Well, although discussing forever is certainly not the
>>>>>>>>> TM> goal, the
>>>>>>>>> reasons for rejecting a proposal need to be thoroughly understood.
>>>>>>>>> WH> my point is what is the real driver for supporting a plain
>>>>>>>>> WH> VXLAN
>>>>>>>>> data-plane here, the use cases I have seen in this txt is
>>>>>>>>> always where an application behind a NVE/TOR is demanding
>>>>>>>>> option c, but none of the NVE/TOR elements.
>>>>>>>>> My understanding is that the applications  are contexts where
>>>>>>>>> overlays are present is when workloads (VMs or baremetal) need
>>>>>>>>> to be interconnected with VPNs. In these contexts, there can be
>>>>>>>>> reasons to want Option C to reduce the state on ASBRs. In these
>>>>>>>>> context, its not the workload (VM or baremetal) that would
>>>>>>>>> typically handle VRFs, but really the vswitch or ToR. WH2> can
>>>>>>>>> it not
>>>> be all cases:
>>>>>>>>> TOR/vswitch/Application. I would make the solution flexible to
>>>>>>>>> support all of these not? 2015-11-13, Henderickx, Wim (Wim):
>>>>>>>>> TM> The right trade-off to make may in fact depend on whether
>>>>>>>>> you
>>>> prefer:
>>>>>>>>> (a) a new dataplane stitching behavior on DC ASBRs (the
>>>>>>>>> behavior specified in this draft) or
>>>>>>>>> (b) an evolution of the encaps on the vswitches and ToRs to
>>>>>>>>> support MPLS/MPLS/(UDP or GRE) WH> b depends on the use case I
>>>>>>>>> don't get what you mean by "b depends on the use case". WH> see
>>>> my
>>>>>>>>> above comment. If the real use case is an application behind
>>>>>>>>> NVE/TOR requiring model C, than all the discussion on impact on
>>>>>>>>> NVE/TOR is void. As such I want to have a discussion on the
>>>>>>>>> real driver/requirement for option c interworking with an IP
>>>>>>>>> based Fabric. Although I can agree than detailing requirements
>>>>>>>>> can always help, I don't think one can assume a certain
>>>>>>>>> application to dismiss the proposal. WH> for me the proposal is
>>>>>>>>> not acceptable for the reasons explained: too much impact on
>>>>>>>>> the data-planes I wrote the above based on the idea that the
>>>>>>>>> encap used in MPLS/MPLS/(UDP or GRE), which hence has to be
>>>>>>>>> supported on the
>>>> ToRs and vswitches.
>>>>>>>>> Another possibility would be
>>>>>>>>> service-label/middle-label/Ethernet
>>>>>>>>> assuming an L2 adjacency between vswitches/ToRs and ASBRs, but
>>>>>>>>> this certainly does not match your typical DC architecture. Or
>>>>>>>>> perhaps had you something else in mind ? WH> see above. The
>>>>>>>>> draft right now also requires changes in existing TOR/NVE so
>>>>>>>>> for me all this discussion/debate is void. No, the spec as it
>>>>>>>>> is can be implemented in its VXLAN variant with existing
>>>>>>>>> vswitches (e.g. OVS allows to choose the VXLAN destination
>>>>>>>>> port, ditto for the linux kernel stack). (ToR is certainly
>>>>>>>>> another story, most of them not having a flexible enough VXLAN
>>>>>>>>> dataplane nor support for any
>>>>>>>>> MPLS-over-IP.)
>>>>>>>>> WH> and how many ports simultaneously would they support? WH>
>>>> and
>>>>>>>>> depending on implementation you don’t need to change any of the
>>>>>>>>> TOR/vswitches. Does this mean that for some implementations you
>>>>>>>>> may not need to change any of the TOR/vswitches, but that for
>>>>>>>>> some others you may ? WH> any proposal on the table requires
>>>>>>>>> changes, so for me this is not a valid discussion See above,
>>>>>>>>> the proposal in the draft does not necessarily need changes in
>>>>>>>>> vswitches. Let me take a practical example : while I can quite
>>>>>>>>> easily see how to implement the procedures in
>>>>>>>>> draft-hao-bess-inter-nvo3-vpn-optionc
>>>>>>>>> based on current vswitch implementations of VXLAN, the lack of
>>>>>>>>> MPLS/MPLS/(UDP, GRE) support in commonplace vswitches seems to
>>>>>> me as
>>>>>>>>> making that alternate solution you suggest harder to implement.
>>>>>>>>> WH> I would disagree to this. Tell me which switch/TOR handles
>>>>>>>>> multiple UDP ports for VXLAN ? I mentioned _v_switches, and
>>>>>>>>> many do support a variable destination port for VXLAN, which is
>>>>>>>>> sufficient to implement what the draft proposes. -Thomas From:
>>>>>>>>> Thomas Morin <thomas.morin@orange.com
>>>>>>>>>
>>>>>>
>>>> <mailto:thomas.morin@orange.com><mailto:thomas.morin@orange.com
>>>>>>>>> <mailto:thomas.morin@orange.com>>> Organization: Orange Date:
>>>>>>>>> Friday 13 November 2015 at 09:57 To: Wim Henderickx
>>>>>>>>> <wim.henderickx@alcatel-lucent.com
>>>>>>>>> <mailto:wim.henderickx@alcatel-
>>>>>> lucent.com><mailto:wim.henderickx@alc
>>>>>>>>> atel-lucent.com
>>>>>>>>>
>>>>>>>>>
>>>>>> <mailto:wim.henderickx@alcatel-lucent.com>>>
>>>>>>>>> Cc: "bess@ietf.org <mailto:bess@ietf.org><mailto:bess@ietf.org
>>>>>>>>> <mailto:bess@ietf.org>>" <bess@ietf.org
>>>>>>>>> <mailto:bess@ietf.org><mailto:bess@ietf.org
>>>>>>>>> <mailto:bess@ietf.org>>> Subject: Re: [bess]
>>>>>>>>> draft-hao-bess-inter-nvo3-vpn-optionc Hi Wim, I agree on the
>>>>>>>>> analysis that this proposal is restricted to implementations
>>>>>>>>> that supports the chosen encap with non-IANA ports (which may
>>>>>>>>> be hard to achieve for instance on hardware implementations, as
>>>>>>>>> you suggest), or to context where managing multiple IPs would
>>>>>>>>> be operationally viable. However, it does not seem obvious to
>>>>>>>>> me how the alternative you propose [relying on 3-label option C
>>>>>>>>> with an
>>>>>>>>> MPLS/MPLS/(UDP|GRE) encap] addresses the issue of whether the
>>>>>> encap
>>>>>>>>> behavior is supported or not (e.g. your typical ToR chipset
>>>>>>>>> possibly may not support this kind of encap,  and even
>>>>>>>>> software-based switches may not be ready to support that today).
>>>>>>>>> My take is that having different options to adapt to various
>>>>>>>>> implementations constraints we may have would have value. (+
>>>>>>>>> one question below on VXLAN...) -Thomas 2015-11-12, Henderickx,
>>>>>>>>> Wim
>>>>>>>>> (Wim): On VXLAN/NVGRE, do you challenge the fact that they
>>>>>>>>> would be used with a dummy MAC address that would be replaced
>>>>>>>>> by the right MAC by a sender based on an ARP request when
>>>>>>>>> needed ? Is the above the issue you had in mind about VXLAN and
>>>>>>>>> NVGRE ? WH> yes I you don't mind me asking : why do you challenge that ?
>>>>>>>>>
>>>>>>
>>>>>>
>>>> __________________________________________________________
>>>>>>
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Date: Sat, 21 Nov 2015 01:29:22 +0100
From: Martin Vigoureux <martin.vigoureux@alcatel-lucent.com>
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Subject: Re: [bess] WG Last Call for draft-ietf-bess-multicast-damping-01
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WG

This WG LC has ended some time ago but without any comment on the draft.
It might not have any flaw but I'd like to have the evidence that the 
document has been reviewed.
Please take a moment to read it and get back to this list to share your 
views.

Thanks
-m


Le 13/10/2015 15:40, Martin Vigoureux a écrit :
> Hello Working Group,
>
> This email starts a Working Group Last Call on
> draft-ietf-bess-multicast-damping-01 [1] which is considered mature and
> ready for a final working group review.
>
> Please read the document if you haven't read the most recent
> version yet, and send your comments to the list, no later than
> *27th of October*.
>
> *Coincidentally*, we are also polling for knowledge of any IPR that
> applies to draft-ietf-bess-multicast-damping, to ensure that IPR has
> been disclosed in compliance with IETF IPR rules (see RFCs 3979, 4879,
> 3669 and 5378 for more details).
>
> *If* you are listed as a document author or contributor of
> draft-ietf-bess-multicast-damping-01 please respond to this email and
> indicate whether or not you are aware of any relevant IPR.
>
> Thank you,
> M&T
>
> [1] https://tools.ietf.org/html/draft-ietf-bess-multicast-damping-01
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>
>


From nobody Fri Nov 20 22:21:38 2015
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From: Haoweiguo <haoweiguo@huawei.com>
To: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>, "UTTARO, JAMES" <ju1738@att.com>, John E Drake <jdrake@juniper.net>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, Lucy yong <lucy.yong@huawei.com>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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From: Zhuangshunwan <zhuangshunwan@huawei.com>
To: Haoweiguo <haoweiguo@huawei.com>, "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>, "UTTARO, JAMES" <ju1738@att.com>, "John E Drake" <jdrake@juniper.net>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, Lucy yong <lucy.yong@huawei.com>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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From: Haoweiguo <haoweiguo@huawei.com>
To: "UTTARO, JAMES" <ju1738@att.com>, John E Drake <jdrake@juniper.net>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, Lucy yong <lucy.yong@huawei.com>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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From: "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>
To: Haoweiguo <haoweiguo@huawei.com>, "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>, "UTTARO, JAMES" <ju1738@att.com>, "John E Drake" <jdrake@juniper.net>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, Lucy yong <lucy.yong@huawei.com>, "bess@ietf.org" <bess@ietf.org>
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Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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From: John E Drake <jdrake@juniper.net>
To: Haoweiguo <haoweiguo@huawei.com>, "UTTARO, JAMES" <ju1738@att.com>, "EXT - thomas.morin@orange.com" <thomas.morin@orange.com>, Lucy yong <lucy.yong@huawei.com>, "Henderickx, Wim (Wim)" <wim.henderickx@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
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Archived-At: <http://mailarchive.ietf.org/arch/msg/bess/SLt2mYeniDTJiIEInBmBJa36Y30>
Subject: Re: [bess] draft-hao-bess-inter-nvo3-vpn-optionc
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--=_85ae49679b472e985a5422fc7d339788
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Respected Authors,

I am having 2 use cases based on that, I have a couple of queries. Correct me if I am wrong or If I am missing something.Your input is highly appreciating.

1. When a new PE comes in the MH segment.
2. When a PE is brought down due to MW(Maintenance window).

As per the above use cases.There will be change in DF election process. And for 3 seconds there is chance of transient loop.There is delay of bgp update received by each PE.Kindly let me know whether this is taken care.
Moreover 3 seconds if the traffic is blocked in the network creates problem for delay sensitive traffic like voice,images etc.

May I know about your views in above cases.

Regards,
Sudhin


--=_85ae49679b472e985a5422fc7d339788
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Respected Authors,<br />
<br />
I am having 2 use cases based on that, I have a couple of queries. Correct =
me if I am wrong or If I am missing something.Your input is highly apprecia=
ting.<br />
<br />
1. When a new PE comes in the MH segment.<br />
2. When a PE is brought down due to MW(Maintenance window).<br />
<br />
As per the above use cases.There will be change in DF election process. And=
 for 3 seconds there is chance of transient loop.There is delay of bgp upda=
te received by each PE.Kindly let me know whether this is taken care.<br />
Moreover 3 seconds if the traffic is blocked in the network creates problem=
 for delay sensitive traffic like voice,images etc.<br />
<br />
May I know about your views in above cases.<br />
<br />
Regards,<br />
Sudhin<br />
<br />
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From: Rotem Cohen <Rotem.Cohen@ecitele.com>
To: "hshah@ciena.com" <hshah@ciena.com>, "draft-shah-bess-l2vpn-yang@ietf.org" <draft-shah-bess-l2vpn-yang@ietf.org>
Thread-Topic: Question on draft-shah-bess-l2vpn-yang-00
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Date: Sun, 22 Nov 2015 15:50:08 +0000
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Subject: [bess] Question on draft-shah-bess-l2vpn-yang-00
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Hi Himanshu, et al.

Can you explain please why for VPWS the leaves 'discovery-type' and 'signal=
ing-type' appear directly below 'vpws-instance/' while for VPLS they appear=
 below 'vpls-instance/pw/'?

It looks that 'signaling-type' should be under '../pw/' hierarchy for both =
vpls-instance and vpws-instance.
The 'discovery-type' leaf should be configured at the service-instance leve=
l with status to indicate that the instance advertises itself (configuratio=
n) and at the PW level as an indication that this specific PW has been set =
up due to auto-discovery vs. manual peer configuration.

'discovery' and 'signaling' containers under 'bgp-parameters' container hav=
e references to '../../discovery-type' and to '../../signaling-type' respec=
tively. Because the referenced leaves are on a different levels of the tree=
 for vpws-instance and vpls-instance it causes compilation error.

Regards,

Rotem Cohen

PTS System Architecture Group Manager

T:

+972.3.926.8247

M:

+972.54.926.8247

E:

Rotem.Cohen@ecitele.com<mailto:Rotem.Cohen@ecitele.com>



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<p class=3D"MsoNormal">Hi Himanshu, et al.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Can you explain please why for VPWS the leaves 'disc=
overy-type' and 'signaling-type' appear directly below 'vpws-instance/' whi=
le for VPLS they appear below 'vpls-instance/pw/'?<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">It looks that 'signaling-type' should be under '../p=
w/' hierarchy for both vpls-instance and vpws-instance.<o:p></o:p></p>
<p class=3D"MsoNormal">The 'discovery-type' leaf should be configured at th=
e service-instance level with status to indicate that the instance advertis=
es itself (configuration) and at the PW level as an indication that this sp=
ecific PW has been set up due to auto-discovery
 vs. manual peer configuration.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">'discovery' and 'signaling' containers under 'bgp-pa=
rameters' container have references to '../../discovery-type' and to '../..=
/signaling-type' respectively. Because the referenced leaves are on a diffe=
rent levels of the tree for vpws-instance
 and vpls-instance it causes compilation error.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal" style=3D"line-height:115%"><span style=3D"color:#031=
432">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"line-height:115%"><span style=3D"font-size:=
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quot;sans-serif&quot;;color:#0057FF;text-transform:uppercase">Rotem Cohen</=
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From: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
To: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>, Haoweiguo <haoweiguo@huawei.com>
Thread-Topic: [bess] One question about Route-type2 usage in EVPN base protocol
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Date: Mon, 23 Nov 2015 22:49:11 +0000
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Subject: Re: [bess] One question about Route-type2 usage in EVPN base protocol
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Hi Weiguo,

Section 10 of RFC 7432 covers this topic nicely. As Jorge alluded to, wheth=
er a PE only sends a single Route-Type-2 or two of them, depends on whether=
 the MAC learning is done in control-plane/management-plane or it is done i=
n data-plane. If it is the former, then only a single Route-Type-2 is sent =
and if it is the latter, then two are sent.

Cheers,
Ali

From: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com<mailto:jor=
ge.rabadan@alcatel-lucent.com>>
Date: Saturday, November 21, 2015 at 9:01 AM
To: Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>, Cisco Em=
ployee <sajassi@cisco.com<mailto:sajassi@cisco.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: Re: [bess] One question about Route-type2 usage in EVPN base proto=
col

Hi Weiguo,

I would recommend you to check out the L2VPN archives... we discussed this =
at length.
For instance:
http://www.ietf.org/mail-archive/web/l2vpn/current/msg04519.html

But check the other emails in the thread.
Sending one or two routes, really depend on how the learning is done.

Hope it helps.
Thanks.
Jorge

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>
Date: Thursday, November 19, 2015 at 1:37 AM
To: "sajassi@cisco.com<mailto:sajassi@cisco.com>" <sajassi@cisco.com<mailto=
:sajassi@cisco.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: [bess] One question about Route-type2 usage in EVPN base protocol

Hi Co-authors,
Through ARP process, each EVPN PE can learn local connecting CE's MAC and I=
P correspondence, and will notify the MAC and IP association to all remote =
PEs through Route-type2 message. Theoretically, each remote PE can rely on =
the single route-type2 message to populate local Mac VRF(MAC table) , ARP C=
ache and IP VRF(IP routing table) at the same time. However, some vendor do=
esn't do in this way. In its implementation, each PE will notify two route-=
type2 message to remote PEs, one message(say message 1) only carry MAC info=
rmation(IP field is invalid), another message(say message 2) carry MAC and =
IP association information. The remote PEs rely on message 1 to populate lo=
cal MAC VRF, and rely on message 2 to populate local ARP Cache and IP VRF.


I think EVPN protocol should give a clear suggestion for route type-2 messa=
ge usage, what's the scenario to announce only one message and what's scena=
rio to announce two messages?



Thanks,

weiguo

--_000_D278D501161856sajassiciscocom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div><br>
</div>
<div>Hi Weiguo,</div>
<div><br>
</div>
<div>Section 10 of RFC 7432 covers this topic nicely. As Jorge alluded to, =
whether a PE only sends a single Route-Type-2 or two of them, depends on wh=
ether the MAC learning is done in control-plane/management-plane or it is d=
one in data-plane. If it is the
 former, then only a single Route-Type-2 is sent and if it is the latter, t=
hen two are sent.&nbsp;</div>
<div><br>
</div>
<div>Cheers,</div>
<div>Ali&nbsp;</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Lucida Grande; font-size:11pt; text-align:left; c=
olor:black; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-B=
OTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt =
solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>&quot;Rabadan, Jorge (Jorge)&=
quot; &lt;<a href=3D"mailto:jorge.rabadan@alcatel-lucent.com">jorge.rabadan=
@alcatel-lucent.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Saturday, November 21, 2015 a=
t 9:01 AM<br>
<span style=3D"font-weight:bold">To: </span>Haoweiguo &lt;<a href=3D"mailto=
:haoweiguo@huawei.com">haoweiguo@huawei.com</a>&gt;, Cisco Employee &lt;<a =
href=3D"mailto:sajassi@cisco.com">sajassi@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>&quot;<a href=3D"mailto:bess@ie=
tf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org">bess@i=
etf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [bess] One question ab=
out Route-type2 usage in EVPN base protocol<br>
</div>
<div><br>
</div>
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 15px; font-famil=
y: Avenir, sans-serif;">
<div>
<div>
<div>Hi Weiguo,</div>
<div><br>
</div>
<div>I would recommend you to check out the L2VPN archives&#8230; we discus=
sed this at length.</div>
<div>For instance:</div>
<div><a href=3D"http://www.ietf.org/mail-archive/web/l2vpn/current/msg04519=
.html">http://www.ietf.org/mail-archive/web/l2vpn/current/msg04519.html</a>=
</div>
<div><br>
</div>
<div>But check the other emails in the thread.</div>
<div>Sending one or two routes, really depend on how the learning is done.&=
nbsp;</div>
<div><br>
</div>
<div>Hope it helps.</div>
<div>Thanks.</div>
<div>Jorge</div>
<div>
<div id=3D"MAC_OUTLOOK_SIGNATURE"></div>
</div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:12pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>BESS &lt;<a href=3D"mailto:be=
ss-bounces@ietf.org">bess-bounces@ietf.org</a>&gt; on behalf of Haoweiguo &=
lt;<a href=3D"mailto:haoweiguo@huawei.com">haoweiguo@huawei.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Thursday, November 19, 2015 a=
t 1:37 AM<br>
<span style=3D"font-weight:bold">To: </span>&quot;<a href=3D"mailto:sajassi=
@cisco.com">sajassi@cisco.com</a>&quot; &lt;<a href=3D"mailto:sajassi@cisco=
.com">sajassi@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>&quot;<a href=3D"mailto:bess@ie=
tf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org">bess@i=
etf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>[bess] One question about =
Route-type2 usage in EVPN base protocol<br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div dir=3D"ltr">
<meta name=3D"GENERATOR" content=3D"MSHTML 8.00.7600.17267">
<style id=3D"owaParaStyle">P {
	MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
</style>
<div fpstyle=3D"1" ocsi=3D"0">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span lang=3D"EN-US"><=
font size=3D"3" face=3D"Times New Roman">Hi Co-authors,</font></span></p>
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span lang=3D"EN-US"><=
font size=3D"3" face=3D"Times New Roman">Through ARP process, each EVPN PE =
can learn local connecting CE&#8217;s MAC and IP correspondence, and will n=
otify the MAC and IP association to all remote PEs
 through Route-type2 message. Theoretically, each remote PE can rely on the=
 single route-type2 message to populate local Mac VRF(MAC table) , ARP Cach=
e and IP VRF(IP routing table) at the same time. However, some vendor doesn=
&#8217;t do in this way. In its implementation,
 each PE will notify two route-type2 message to remote PEs, one message(say=
 message 1) only carry MAC information(IP field is invalid), another messag=
e(say message 2) carry MAC and IP association information. The remote PEs r=
ely on message 1 to populate local
 MAC VRF, and rely on message 2 to populate local ARP Cache and IP VRF.</fo=
nt></span></p>
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span lang=3D"EN-US"><=
font size=3D"3" face=3D"Times New Roman"></font></span>&nbsp;</p>
<p><span style=3D"line-height: 150%; font-family: 'Times New Roman', serif;=
 font-size: 10.5pt;" lang=3D"EN-US"><font size=3D"3">I think EVPN protocol =
should give a clear suggestion for route type-2 message usage, what&#8217;s=
 the scenario to announce only one message and
 what&#8217;s scenario to announce two messages?</font></span></p>
<p><span style=3D"line-height: 150%; font-family: 'Times New Roman', serif;=
 font-size: 10.5pt;" lang=3D"EN-US"></span>&nbsp;</p>
<p><span style=3D"line-height: 150%; font-family: 'Times New Roman', serif;=
 font-size: 10.5pt;" lang=3D"EN-US"><font size=3D"3">Thanks,</font></span><=
/p>
<p><span style=3D"line-height: 150%; font-family: 'Times New Roman', serif;=
 font-size: 10.5pt;" lang=3D"EN-US"><font size=3D"3">weiguo</font></span></=
p>
</div>
</div>
</div>
</blockquote>
</span></div>
</div>
</span>
</body>
</html>

--_000_D278D501161856sajassiciscocom_--


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From: "Patrice Brissette (pbrisset)" <pbrisset@cisco.com>
To: Rotem Cohen <Rotem.Cohen@ecitele.com>, "hshah@ciena.com" <hshah@ciena.com>, "draft-shah-bess-l2vpn-yang@ietf.org" <draft-shah-bess-l2vpn-yang@ietf.org>
Thread-Topic: Question on draft-shah-bess-l2vpn-yang-00
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Rotem,

I agree with your statement. I'll bring this up in our weekly meeting and g=
et back to you on Thursday.

Regards,

Patrice

   [http://www.cisco.com/web/europe/images/email/signature/est2014/logo_06.=
png?ct=3D1406640631632]

Patrice Brissette
TECHNICAL LEADER.ENGINEERING

pbrisset@cisco.com<mailto:pbrisset@cisco.com>
Phone: +1 613 254 3336


Cisco Systems Canada Co. / Les Systemes Cisco Canada CIE
Canada
Cisco.com<http://www.cisco.com/global/CA/>



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From: Rotem Cohen <Rotem.Cohen@ecitele.com<mailto:Rotem.Cohen@ecitele.com>>
Date: Sunday, November 22, 2015 at 10:50 AM
To: "hshah@ciena.com<mailto:hshah@ciena.com>" <hshah@ciena.com<mailto:hshah=
@ciena.com>>, "draft-shah-bess-l2vpn-yang@ietf.org<mailto:draft-shah-bess-l=
2vpn-yang@ietf.org>" <draft-shah-bess-l2vpn-yang@ietf.org<mailto:draft-shah=
-bess-l2vpn-yang@ietf.org>>
Cc: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>, Evyatar Wiesel <Evyatar.Wiesel@ecitele.com<mailt=
o:Evyatar.Wiesel@ecitele.com>>, "bess@ietf.org<mailto:bess@ietf.org>" <bess=
@ietf.org<mailto:bess@ietf.org>>
Subject: Question on draft-shah-bess-l2vpn-yang-00

Hi Himanshu, et al.

Can you explain please why for VPWS the leaves 'discovery-type' and 'signal=
ing-type' appear directly below 'vpws-instance/' while for VPLS they appear=
 below 'vpls-instance/pw/'?

It looks that 'signaling-type' should be under '../pw/' hierarchy for both =
vpls-instance and vpws-instance.
The 'discovery-type' leaf should be configured at the service-instance leve=
l with status to indicate that the instance advertises itself (configuratio=
n) and at the PW level as an indication that this specific PW has been set =
up due to auto-discovery vs. manual peer configuration.

'discovery' and 'signaling' containers under 'bgp-parameters' container hav=
e references to '../../discovery-type' and to '../../signaling-type' respec=
tively. Because the referenced leaves are on a different levels of the tree=
 for vpws-instance and vpls-instance it causes compilation error.

Regards,

Rotem Cohen

PTS System Architecture Group Manager

T:

+972.3.926.8247

M:

+972.54.926.8247

E:

Rotem.Cohen@ecitele.com<mailto:Rotem.Cohen@ecitele.com>



www.ecitele.com<http://www.ecitele.com/>

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<div>
<div>
<div>Rotem,</div>
<div><br>
</div>
<div>I agree with your statement. I&#8217;ll bring this up in our weekly me=
eting and get back to you on Thursday.</div>
<div>
<div><br>
</div>
<div>Regards,</div>
<div><br>
</div>
<div>Patrice<br>
<br>
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<strong>Patrice Brissette</strong><br>
TECHNICAL LEADER.ENGINEERING<br>
<br>
<a style=3D"color:#666666; text-decoration: none;" href=3D"mailto:pbrisset@=
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<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>Rotem Cohen &lt;<a href=3D"ma=
ilto:Rotem.Cohen@ecitele.com">Rotem.Cohen@ecitele.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Sunday, November 22, 2015 at =
10:50 AM<br>
<span style=3D"font-weight:bold">To: </span>&quot;<a href=3D"mailto:hshah@c=
iena.com">hshah@ciena.com</a>&quot; &lt;<a href=3D"mailto:hshah@ciena.com">=
hshah@ciena.com</a>&gt;, &quot;<a href=3D"mailto:draft-shah-bess-l2vpn-yang=
@ietf.org">draft-shah-bess-l2vpn-yang@ietf.org</a>&quot; &lt;<a href=3D"mai=
lto:draft-shah-bess-l2vpn-yang@ietf.org">draft-shah-bess-l2vpn-yang@ietf.or=
g</a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>Alexander Vainshtein &lt;<a hre=
f=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.=
com</a>&gt;, Evyatar Wiesel &lt;<a href=3D"mailto:Evyatar.Wiesel@ecitele.co=
m">Evyatar.Wiesel@ecitele.com</a>&gt;, &quot;<a href=3D"mailto:bess@ietf.or=
g">bess@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Question on draft-shah-bes=
s-l2vpn-yang-00<br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
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<p class=3D"MsoNormal">Hi Himanshu, et al.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Can you explain please why for VPWS the leaves 'disc=
overy-type' and 'signaling-type' appear directly below 'vpws-instance/' whi=
le for VPLS they appear below 'vpls-instance/pw/'?<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">It looks that 'signaling-type' should be under '../p=
w/' hierarchy for both vpls-instance and vpws-instance.<o:p></o:p></p>
<p class=3D"MsoNormal">The 'discovery-type' leaf should be configured at th=
e service-instance level with status to indicate that the instance advertis=
es itself (configuration) and at the PW level as an indication that this sp=
ecific PW has been set up due to auto-discovery
 vs. manual peer configuration.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">'discovery' and 'signaling' containers under 'bgp-pa=
rameters' container have references to '../../discovery-type' and to '../..=
/signaling-type' respectively. Because the referenced leaves are on a diffe=
rent levels of the tree for vpws-instance
 and vpls-instance it causes compilation error.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal" style=3D"line-height:115%"><span style=3D"color:#031=
432">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"line-height:115%"><span style=3D"font-size:=
 9pt; line-height: 115%; font-family: Arial, sans-serif; color: rgb(3, 20, =
50);"><o:p>&nbsp;</o:p></span></p>
<table class=3D"MsoTableGrid" border=3D"1" cellspacing=3D"0" cellpadding=3D=
"0" style=3D"border-collapse:collapse;border:none">
<tbody>
<tr>
<td width=3D"397" colspan=3D"2" valign=3D"top" style=3D"width:297.7pt;borde=
r:none;border-top:solid #1F497D 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class=3D"MsoNormal" style=3D"margin-top:12.0pt;line-height:115%"><b><spa=
n style=3D"font-size: 9pt; line-height: 115%; font-family: Arial, sans-seri=
f; color: rgb(0, 87, 255); text-transform: uppercase;">Rotem Cohen</span></=
b><b><span style=3D"font-size: 9pt; line-height: 115%; font-family: Arial, =
sans-serif; color: rgb(0, 87, 255);"><o:p></o:p></span></b></p>
</td>
</tr>
<tr style=3D"height:21.25pt">
<td width=3D"397" colspan=3D"2" valign=3D"top" style=3D"width:297.7pt;borde=
r:none;padding:0cm 5.4pt 0cm 5.4pt;height:21.25pt">
<p class=3D"MsoNormal" style=3D"line-height:115%"><b><span style=3D"font-si=
ze: 9pt; line-height: 115%; font-family: Arial, sans-serif; color: rgb(3, 2=
0, 50);">PTS System Architecture Group Manager<o:p></o:p></span></b></p>
</td>
</tr>
<tr>
<td width=3D"47" valign=3D"top" style=3D"width:35.05pt;border:none;padding:=
0cm 5.4pt 0cm 5.4pt">
<p class=3D"MsoNormal" style=3D"line-height:115%"><b><span style=3D"font-si=
ze: 9pt; line-height: 115%; font-family: Arial, sans-serif; color: rgb(3, 2=
0, 50);">T:<o:p></o:p></span></b></p>
</td>
<td width=3D"350" valign=3D"top" style=3D"width:262.65pt;border:none;paddin=
g:0cm 5.4pt 0cm 5.4pt">
<p class=3D"MsoNormal" style=3D"line-height:115%"><span style=3D"font-size:=
 9pt; line-height: 115%; font-family: Arial, sans-serif; color: rgb(3, 20, =
50);">&#43;972.3.926.8247<o:p></o:p></span></p>
</td>
</tr>
<tr>
<td width=3D"47" valign=3D"top" style=3D"width:35.05pt;border:none;padding:=
0cm 5.4pt 0cm 5.4pt">
<p class=3D"MsoNormal" style=3D"line-height:115%"><b><span style=3D"font-si=
ze: 9pt; line-height: 115%; font-family: Arial, sans-serif; color: rgb(3, 2=
0, 50);">M:<o:p></o:p></span></b></p>
</td>
<td width=3D"350" valign=3D"top" style=3D"width:262.65pt;border:none;paddin=
g:0cm 5.4pt 0cm 5.4pt">
<p class=3D"MsoNormal" style=3D"line-height:115%"><span style=3D"font-size:=
 9pt; line-height: 115%; font-family: Arial, sans-serif; color: rgb(3, 20, =
50);">&#43;972.54.926.8247<o:p></o:p></span></p>
</td>
</tr>
<tr>
<td width=3D"47" valign=3D"top" style=3D"width:35.05pt;border:none;padding:=
0cm 5.4pt 0cm 5.4pt">
<p class=3D"MsoNormal" style=3D"line-height:115%"><b><span style=3D"font-si=
ze: 9pt; line-height: 115%; font-family: Arial, sans-serif; color: rgb(3, 2=
0, 50);">E:<o:p></o:p></span></b></p>
</td>
<td width=3D"350" valign=3D"top" style=3D"width:262.65pt;border:none;paddin=
g:0cm 5.4pt 0cm 5.4pt">
<p class=3D"MsoNormal" style=3D"line-height:115%"><span style=3D"font-size:=
9.0pt;line-height:115%;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;=
"><a href=3D"mailto:Rotem.Cohen@ecitele.com"><span style=3D"color:blue">Rot=
em.Cohen@ecitele.com</span></a><span style=3D"color:#031432"><o:p></o:p></s=
pan></span></p>
</td>
</tr>
<tr style=3D"height:18.55pt">
<td width=3D"47" valign=3D"top" style=3D"width:35.05pt;border:none;padding:=
0cm 5.4pt 0cm 5.4pt;height:18.55pt">
<p class=3D"MsoNormal" style=3D"line-height:115%"><b><span style=3D"font-si=
ze: 9pt; line-height: 115%; font-family: Arial, sans-serif; color: rgb(3, 2=
0, 50);"><o:p>&nbsp;</o:p></span></b></p>
</td>
<td width=3D"350" valign=3D"top" style=3D"width:262.65pt;border:none;paddin=
g:0cm 5.4pt 0cm 5.4pt;height:18.55pt">
<p class=3D"MsoNormal" style=3D"line-height:115%"><a href=3D"http://www.eci=
tele.com/"><b><span style=3D"font-size: 9pt; line-height: 115%; font-family=
: Arial, sans-serif; color: blue;">www.ecitele.com</span></b></a><b><span s=
tyle=3D"font-size: 9pt; line-height: 115%; font-family: Arial, sans-serif; =
color: rgb(3, 20, 50);"><o:p></o:p></span></b></p>
</td>
</tr>
<tr>
<td width=3D"397" colspan=3D"2" valign=3D"top" style=3D"width:297.7pt;borde=
r:none;padding:0cm 5.4pt 0cm 5.4pt">
<p class=3D"MsoNormal" style=3D"line-height:115%"><b><span style=3D"font-si=
ze: 9pt; line-height: 115%; font-family: Arial, sans-serif; color: rgb(3, 2=
0, 50);"><img border=3D"0" width=3D"169" height=3D"34" id=3D"Picture_x0020_=
2" src=3D"cid:image002.png@01D1254E.38D36570"><o:p></o:p></span></b></p>
</td>
</tr>
</tbody>
</table>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</div>
</div>
</blockquote>
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From: "Patrice Brissette (pbrisset)" <pbrisset@cisco.com>
To: sudeep g ggg <sudhinjacob@rediffmail.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] REG: draft-mohanty-bess-evpn-df-election-02
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Sudeep,

Why do you think there will be a loop? Per ES EAD route carry ESI-mpls extc=
omm which has a split-horizon label to avoid such problem. I think also it =
depends on how your configure your router (in what order).
In the case of PBB-EVPN, it is taken care by the nature of PBB.



Regards,

Patrice

   [http://www.cisco.com/web/europe/images/email/signature/est2014/logo_06.=
png?ct=3D1406640631632]

Patrice Brissette
TECHNICAL LEADER.ENGINEERING

pbrisset@cisco.com<mailto:pbrisset@cisco.com>
Phone: +1 613 254 3336


Cisco Systems Canada Co. / Les Systemes Cisco Canada CIE
Canada
Cisco.com<http://www.cisco.com/global/CA/>



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From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of sudeep g ggg <sudhinjacob@rediffmail.com<mailto:sudhinjacob@rediffmail.c=
om>>
Date: Sunday, November 22, 2015 at 1:21 AM
To: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: [bess] REG: draft-mohanty-bess-evpn-df-election-02

Respected Authors,

I am having 2 use cases based on that, I have a couple of queries. Correct =
me if I am wrong or If I am missing something.Your input is highly apprecia=
ting.

1. When a new PE comes in the MH segment.
2. When a PE is brought down due to MW(Maintenance window).

As per the above use cases.There will be change in DF election process. And=
 for 3 seconds there is chance of transient loop.There is delay of bgp upda=
te received by each PE.Kindly let me know whether this is taken care.
Moreover 3 seconds if the traffic is blocked in the network creates problem=
 for delay sensitive traffic like voice,images etc.

May I know about your views in above cases.

Regards,
Sudhin


[https://sigads.rediff.com/RealMedia/ads/adstream_nx.ads/www.rediffmail.com=
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<div>
<div>
<div>Sudeep,</div>
<div><br>
</div>
<div>Why do you think there will be a loop? Per ES EAD route carry ESI-mpls=
 extcomm which has a split-horizon label to avoid such problem. I think als=
o it depends on how your configure your router (in what order).</div>
<div>In the case of PBB-EVPN, it is taken care by the nature of PBB.</div>
<div><br>
</div>
<div>
<div><br>
</div>
<div><br>
</div>
<div>Regards,</div>
<div><br>
</div>
<div>Patrice<br>
<br>
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<strong>Patrice Brissette</strong><br>
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<br>
<a style=3D"color:#666666; text-decoration: none;" href=3D"mailto:pbrisset@=
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<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
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<span style=3D"font-weight:bold">From: </span>BESS &lt;<a href=3D"mailto:be=
ss-bounces@ietf.org">bess-bounces@ietf.org</a>&gt; on behalf of sudeep g gg=
g &lt;<a href=3D"mailto:sudhinjacob@rediffmail.com">sudhinjacob@rediffmail.=
com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Sunday, November 22, 2015 at =
1:21 AM<br>
<span style=3D"font-weight:bold">To: </span>&quot;<a href=3D"mailto:bess@ie=
tf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org">bess@i=
etf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>[bess] REG: draft-mohanty-=
bess-evpn-df-election-02<br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div>Respected Authors,<br>
<br>
I am having 2 use cases based on that, I have a couple of queries. Correct =
me if I am wrong or If I am missing something.Your input is highly apprecia=
ting.<br>
<br>
1. When a new PE comes in the MH segment.<br>
2. When a PE is brought down due to MW(Maintenance window).<br>
<br>
As per the above use cases.There will be change in DF election process. And=
 for 3 seconds there is chance of transient loop.There is delay of bgp upda=
te received by each PE.Kindly let me know whether this is taken care.<br>
Moreover 3 seconds if the traffic is blocked in the network creates problem=
 for delay sensitive traffic like voice,images etc.<br>
<br>
May I know about your views in above cases.<br>
<br>
Regards,<br>
Sudhin<br>
<br>
<br>
<table border=3D"0" width=3D"100%" height=3D"57" cellspacing=3D"0" cellpadd=
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From: "Satya Mohanty (satyamoh)" <satyamoh@cisco.com>
To: "Patrice Brissette (pbrisset)" <pbrisset@cisco.com>, sudeep g ggg <sudhinjacob@rediffmail.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] REG: draft-mohanty-bess-evpn-df-election-02
Thread-Index: AQHRJO4HQBjalxTl0kqU/yKw1B0cn56q0ISA//+CxIA=
Date: Tue, 24 Nov 2015 03:25:09 +0000
Message-ID: <D27911B5.42813%satyamoh@cisco.com>
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Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02
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Hi Sudeep,

Please see inline [Satya].
Patrice, thanks for your observation.


From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of "Patrice Brissette (pbrisset)" <pbrisset@cisco.com<mailto:pbrisset@cisco=
.com>>
Date: Monday, November 23, 2015 6:53 PM
To: sudeep g ggg <sudhinjacob@rediffmail.com<mailto:sudhinjacob@rediffmail.=
com>>, "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@iet=
f.org>>
Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02

Sudeep,

Why do you think there will be a loop? Per ES EAD route carry ESI-mpls extc=
omm which has a split-horizon label to avoid such problem. I think also it =
depends on how your configure your router (in what order).
In the case of PBB-EVPN, it is taken care by the nature of PBB.



Regards,

Patrice

   [http://www.cisco.com/web/europe/images/email/signature/est2014/logo_06.=
png?ct=3D1406640631632]

Patrice Brissette
TECHNICAL LEADER.ENGINEERING

pbrisset@cisco.com<mailto:pbrisset@cisco.com>
Phone: +1 613 254 3336


Cisco Systems Canada Co. / Les Systemes Cisco Canada CIE
Canada
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From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of sudeep g ggg <sudhinjacob@rediffmail.com<mailto:sudhinjacob@rediffmail.c=
om>>
Date: Sunday, November 22, 2015 at 1:21 AM
To: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: [bess] REG: draft-mohanty-bess-evpn-df-election-02

Respected Authors,

I am having 2 use cases based on that, I have a couple of queries. Correct =
me if I am wrong or If I am missing something.Your input is highly apprecia=
ting.

1. When a new PE comes in the MH segment.
[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the rec=
eiving PEs also need to wait for 3 secs. But, ideally, a PE that is going f=
rom DF to non-DF or non-DF to non-DF should become the non-DF rightaway. On=
ly the PE that is going DF really needs to wait for 3 secs. This is not exp=
licitly spelled out in the draft but we are thinking along these lines.

Now, delay of BGP updates is not dependent on the above behavior. That depe=
nds on the network topology and queueing/processing at intermediate nodes.
With HRW,  a PE coming up will result in minimal disruption of the establis=
hed DF for various vlans (bundles) as opposed to RFC 7438 mod-based.

2. When a PE is brought down due to MW(Maintenance window).
[Satya] As per the HRW, if this PE was not the DF for a vlan (vlan-bundle) =
this should have no effect on the DF election.
This is where it again performs better than the RFC 7438 modulo-based algor=
ithm.
If this was the DF, then some other surviving PE, say PE' for which the Has=
h(PE', vlan) is maximum can become the PE right away on receiving the BGP w=
ithdraw.
There is no need for a three second wait.


As per the above use cases.There will be change in DF election process. And=
 for 3 seconds there is chance of transient loop.There is delay of bgp upda=
te received by each PE.Kindly let me know whether this is taken care.
Moreover 3 seconds if the traffic is blocked in the network creates problem=
 for delay sensitive traffic like voice,images etc.

May I know about your views in above cases.

Regards,
Sudhin


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e-break: after-white-space; font-size: 14px; font-family: Calibri, sans-ser=
if; ">
<div style=3D"color: rgb(0, 0, 0); ">Hi Sudeep,&nbsp;</div>
<div style=3D"color: rgb(0, 0, 0); "><br>
</div>
<div><span style=3D"color: rgb(0, 0, 0); ">Please see inline </span><font c=
olor=3D"#0000ff">[Satya]</font>.</div>
<div style=3D"color: rgb(0, 0, 0); ">Patrice, thanks for your observation.<=
/div>
<div style=3D"color: rgb(0, 0, 0); "><br>
</div>
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<span style=3D"font-weight:bold">From: </span>BESS &lt;<a href=3D"mailto:be=
ss-bounces@ietf.org">bess-bounces@ietf.org</a>&gt; on behalf of &quot;Patri=
ce Brissette (pbrisset)&quot; &lt;<a href=3D"mailto:pbrisset@cisco.com">pbr=
isset@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Monday, November 23, 2015 6:5=
3 PM<br>
<span style=3D"font-weight:bold">To: </span>sudeep g ggg &lt;<a href=3D"mai=
lto:sudhinjacob@rediffmail.com">sudhinjacob@rediffmail.com</a>&gt;, &quot;<=
a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mail=
to:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [bess] REG: draft-moha=
nty-bess-evpn-df-election-02<br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
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y: Calibri, sans-serif;">
<div>
<div>
<div>Sudeep,</div>
<div><br>
</div>
<div>Why do you think there will be a loop? Per ES EAD route carry ESI-mpls=
 extcomm which has a split-horizon label to avoid such problem. I think als=
o it depends on how your configure your router (in what order).</div>
<div>In the case of PBB-EVPN, it is taken care by the nature of PBB.</div>
<div><br>
</div>
<div>
<div><br>
</div>
<div><br>
</div>
<div>Regards,</div>
<div><br>
</div>
<div>Patrice<br>
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<strong>Patrice Brissette</strong><br>
TECHNICAL LEADER.ENGINEERING<br>
<br>
<a style=3D"color:#666666; text-decoration: none;" href=3D"mailto:pbrisset@=
cisco.com">pbrisset@cisco.com</a><br>
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<span style=3D"font-weight:bold">From: </span>BESS &lt;<a href=3D"mailto:be=
ss-bounces@ietf.org">bess-bounces@ietf.org</a>&gt; on behalf of sudeep g gg=
g &lt;<a href=3D"mailto:sudhinjacob@rediffmail.com">sudhinjacob@rediffmail.=
com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Sunday, November 22, 2015 at =
1:21 AM<br>
<span style=3D"font-weight:bold">To: </span>&quot;<a href=3D"mailto:bess@ie=
tf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@ietf.org">bess@i=
etf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>[bess] REG: draft-mohanty-=
bess-evpn-df-election-02<br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div>Respected Authors,<br>
<br>
I am having 2 use cases based on that, I have a couple of queries. Correct =
me if I am wrong or If I am missing something.Your input is highly apprecia=
ting.<br>
<br>
1. When a new PE comes in the MH segment.</div>
</div>
</blockquote>
</span></div>
</div>
</blockquote>
</span>
<div><font color=3D"#0000ff">[Satya] Yes, New PE needs to wait for 3 sec. A=
ccording to RFC 7438, the receiving PEs also need to wait for 3 secs. But, =
ideally, a PE that is going from DF to non-DF or non-DF to non-DF should be=
come the non-DF rightaway. Only the
 PE that is going DF really needs to wait for 3 secs. This is not explicitl=
y spelled out in the draft but we are thinking along these lines.&nbsp;</fo=
nt></div>
<div><font color=3D"#0000ff"><br>
</font></div>
<div><font color=3D"#0000ff">Now, delay of BGP updates is not dependent on =
the above behavior. That depends on the network topology and queueing/proce=
ssing at intermediate nodes.</font></div>
<div><font color=3D"#0000ff">With HRW, &nbsp;a PE coming up will result in =
minimal disruption of the established DF for various vlans (bundles) as opp=
osed to RFC 7438 mod-based.&nbsp;</font></div>
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"color: rgb(0, 0, 0); ">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<span id=3D"OLK_SRC_BODY_SECTION">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div><br>
2. When a PE is brought down due to MW(Maintenance window).</div>
</div>
</blockquote>
</span></div>
</div>
</blockquote>
</span>
<div><font color=3D"#0000ff">[Satya] As per the HRW, if this PE was not the=
 DF for a vlan (vlan-bundle) this should have no effect on the DF election.=
</font></div>
<div><font color=3D"#0000ff">This is where it again performs better than th=
e RFC 7438 modulo-based algorithm.</font></div>
<div><font color=3D"#0000ff">If this was the DF, then some other surviving =
PE, say PE' for which the Hash(PE', vlan) is maximum can become the PE righ=
t away on receiving the BGP withdraw.</font></div>
<div><font color=3D"#0000ff">There is no need for a three second wait.</fon=
t></div>
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"color: rgb(0, 0, 0); ">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<span id=3D"OLK_SRC_BODY_SECTION">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div><br>
<br>
As per the above use cases.There will be change in DF election process. And=
 for 3 seconds there is chance of transient loop.There is delay of bgp upda=
te received by each PE.Kindly let me know whether this is taken care.<br>
Moreover 3 seconds if the traffic is blocked in the network creates problem=
 for delay sensitive traffic like voice,images etc.<br>
<br>
May I know about your views in above cases.<br>
<br>
Regards,<br>
Sudhin<br>
<br>
<br>
<table border=3D"0" width=3D"100%" height=3D"57" cellspacing=3D"0" cellpadd=
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From: Tony Przygienda <tonysietf@gmail.com>
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Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02
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> 1. When a new PE comes in the MH segment.
> [Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the
> receiving PEs also need to wait for 3 secs. But, ideally, a PE that is
> going from DF to non-DF or non-DF to non-DF should become the non-DF righ=
t
> away. Only the PE that is going DF really needs to wait for 3 secs. This =
is
> not explicitly spelled out in the draft but we are thinking along these
> lines.


Actually, the only reason to give up DF is if a new ES route is received
and then 3 secs is necessary for e'one. If a ES is lost, no wait time is
necessary on re-election (i.e. DFs can assume DF immediately or give up DF
immediately). Small window of ES route loss being realized by all peers is
of course here (but we assume that is happening very fast in today's
deployments). FSM in the draft shows that. Are any improvements needed
there ? All those questions should be answered by reference FSM in the
draft already so it's worth improving it (I see this question 3rd time or
so already ?)

thanks

-- tony


--=20
*We=E2=80=99ve heard that a million monkeys at a million keyboards could pr=
oduce
the complete works of Shakespeare; now, thanks to the Internet, we know
that is not true.*
=E2=80=94Robert Wilensky

--047d7b10ca4743fefb052541a554
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<div dir=3D"ltr"><div><br></div><div><blockquote style=3D"margin:0px 0px 0p=
x 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-lef=
t-style:solid;padding-left:1ex" class=3D"gmail_quote">1. When a new PE come=
s in the MH segment.<br>[Satya] Yes, New PE needs to wait for 3 sec. Accord=
ing to RFC 7438, the receiving PEs also need to wait for 3 secs. But, ideal=
ly, a PE that is going from DF to non-DF or non-DF to non-DF should become =
the non-DF right away. Only the PE that is going DF really needs to wait fo=
r 3 secs. This is not explicitly spelled out in the draft but we are thinki=
ng along these lines.</blockquote></div><br clear=3D"all"><div>Actually, th=
e only reason to give up DF is if a new ES route is received and then 3 sec=
s is necessary for e&#39;one. If a ES is lost, no wait time is necessary on=
 re-election (i.e. DFs can assume DF immediately or give up DF immediately)=
. Small window of ES route loss being realized by all peers is of course he=
re (but we assume that is happening very fast in today&#39;s deployments). =
FSM in the draft shows that. Are any improvements needed there ? All those =
questions should be answered by reference FSM in the draft already so it&#3=
9;s worth improving it (I see this question 3rd time=C2=A0or so=C2=A0alread=
y ?)</div><div><br></div><div>thanks</div><div><br></div><div>-- tony=C2=A0=
</div><div><br></div><div><br></div>-- <br><div class=3D"gmail_signature"><=
div dir=3D"ltr"><div><span style=3D"font-size:12.8px"><font face=3D"georgia=
, serif"><i>We=E2=80=99ve heard that a million monkeys at a million keyboar=
ds could produce the complete works of Shakespeare; now, thanks to the Inte=
rnet, we know that is not true.</i></font></span><i><font face=3D"garamond,=
 serif"><br></font></i></div><div><span style=3D"font-size:12.8px"><font fa=
ce=3D"times new roman, serif">=E2=80=94Robert Wilensky</font></span><br></d=
iv></div></div>
</div>

--047d7b10ca4743fefb052541a554--


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Respected Satya,

Let me thank you for the mail. IT is much appreciated. May I request you to look in to my reply named "sudhin". If this is already taken care my sincere apologies for asking redundant question.

Regards,
Sudhin Jacob


1. When a new PE comes in the MH segment.


[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the receiving PEs also need to wait for 3 secs. But, ideally, a PE that is going from DF to non-DF or non-DF to non-DF should become the non-DF rightaway. Only the  PE that is going DF really needs to wait for 3 secs. This is not explicitly spelled out in the draft but we are thinking along these lines.

Sudhin>> you are correct Satya but how to deal with traffic for 3 seconds when a new type 4 route comes. DF election kicks in and all PE's, For 3 seconds how to deal with traffic, the state machines need to be updated like blocking traffic or forwarding. if  during that time the traffic is forwarded then a loop will be created. the EVPN RFC says SH label and BUM drop after the election, but correct me if I am totally wrong during the transition how to deal is not covered.I request your valid input on this. How to deal in that situation,what is the state of PE's during 3 seconds period.How to reach a consensus between vendors. Say for example vendors design custom solution to handle this, then how the inter op between vendors will not work.


Now, delay of BGP updates is not dependent on the above behavior. That depends on the network topology and queueing/processing at intermediate nodes.
With HRW, a PE coming up will result in minimal disruption of the established DF for various vlans (bundles) as opposed to RFC 7438 mod-based.



On Tue, 24 Nov 2015 08:55:20 +0530 "Satya Mohanty (satyamoh)"  wrote
> 


 

Hi Sudeep,



Please see inline [Satya].
Patrice, thanks for your observation.








From: BESS  on behalf of "Patrice Brissette (pbrisset)" 

Date: Monday, November 23, 2015 6:53 PM

To: sudeep g ggg , "bess@ietf.org" 

Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02










Sudeep,



Why do you think there will be a loop? Per ES EAD route carry ESI-mpls extcomm which has a split-horizon label to avoid such problem. I think also it depends on how your configure your router (in what order).
In the case of PBB-EVPN, it is taken care by the nature of PBB.










Regards,



Patrice










 




Patrice Brissette

TECHNICAL LEADER.ENGINEERING



pbrisset@cisco.com

Phone: +1 613 254 3336





Cisco Systems Canada Co. / Les Systemes Cisco Canada CIE

Canada

Cisco.com













 Think before you print.



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 recipient), please contact the sender by reply email and delete all copies of this message.
Please 
click here for Company Registration Information.



















From: BESS  on behalf of sudeep g ggg 

Date: Sunday, November 22, 2015 at 1:21 AM

To: "bess@ietf.org" 

Subject: [bess] REG: draft-mohanty-bess-evpn-df-election-02







Respected Authors,



I am having 2 use cases based on that, I have a couple of queries. Correct me if I am wrong or If I am missing something.Your input is highly appreciating.



1. When a new PE comes in the MH segment.






[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the receiving PEs also need to wait for 3 secs. But, ideally, a PE that is going from DF to non-DF or non-DF to non-DF should become the non-DF rightaway. Only the
 PE that is going DF really needs to wait for 3 secs. This is not explicitly spelled out in the draft but we are thinking along these lines.



Now, delay of BGP updates is not dependent on the above behavior. That depends on the network topology and queueing/processing at intermediate nodes.
With HRW, a PE coming up will result in minimal disruption of the established DF for various vlans (bundles) as opposed to RFC 7438 mod-based.









2. When a PE is brought down due to MW(Maintenance window).






[Satya] As per the HRW, if this PE was not the DF for a vlan (vlan-bundle) this should have no effect on the DF election.
This is where it again performs better than the RFC 7438 modulo-based algorithm.
If this was the DF, then some other surviving PE, say PE' for which the Hash(PE', vlan) is maximum can become the PE right away on receiving the BGP withdraw.
There is no need for a three second wait.











As per the above use cases.There will be change in DF election process. And for 3 seconds there is chance of transient loop.There is delay of bgp update received by each PE.Kindly let me know whether this is taken care.

Moreover 3 seconds if the traffic is blocked in the network creates problem for delay sensitive traffic like voice,images etc.



May I know about your views in above cases.



Regards,

Sudhin
















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Respected Satya,<br />
<br />
Let me thank you for the mail. IT is much appreciated. May I request you to=
 look in to my reply named "sudhin". If this is already taken care my since=
re apologies for asking redundant question.<br />
<br />
Regards,<br />
Sudhin Jacob<br />
<br />
<br />
1. When a new PE comes in the MH segment.<br />
<br />
<br />
[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the rec=
eiving PEs also need to wait for 3 secs. But, ideally, a PE that is going f=
rom DF to non-DF or non-DF to non-DF should become the non-DF rightaway. On=
ly the  PE that is going DF really needs to wait for 3 secs. This is not ex=
plicitly spelled out in the draft but we are thinking along these lines.<br=
 />
<br />
Sudhin>> you are correct Satya but how to deal with traffic for 3 seconds w=
hen a new type 4 route comes. DF election kicks in and all PE's, For 3 seco=
nds how to deal with traffic, the state machines need to be updated like bl=
ocking traffic or forwarding. if  during that time the traffic is forwarded=
 then a loop will be created. the EVPN RFC says SH label and BUM drop after=
 the election, but correct me if I am totally wrong during the transition h=
ow to deal is not covered.I request your valid input on this. How to deal i=
n that situation,what is the state of PE's during 3 seconds period.How to r=
each a consensus between vendors. Say for example vendors design custom sol=
ution to handle this, then how the inter op between vendors will not work.<=
br />
<br />
<br />
Now, delay of BGP updates is not dependent on the above behavior. That depe=
nds on the network topology and queueing/processing at intermediate nodes.<=
br />
With HRW, a PE coming up will result in minimal disruption of the establish=
ed DF for various vlans (bundles) as opposed to RFC 7438 mod-based.<br />
<br />
<br />
<br />
On Tue, 24 Nov 2015 08:55:20 +0530 "Satya Mohanty (satyamoh)" <satyamoh@cis=
co.com> wrote<br />
> <br />
<br />
<br />
 <br />
<br />
Hi Sudeep,<br />
<br />
<br />
<br />
Please see inline [Satya].<br />
Patrice, thanks for your observation.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
From: BESS <bess-bounces@ietf.org> on behalf of "Patrice Brissette (pbrisse=
t)" <pbrisset@cisco.com><br />
<br />
Date: Monday, November 23, 2015 6:53 PM<br />
<br />
To: sudeep g ggg <sudhinjacob@rediffmail.com>, "bess@ietf.org" <bess@ietf.o=
rg><br />
<br />
Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Sudeep,<br />
<br />
<br />
<br />
Why do you think there will be a loop? Per ES EAD route carry ESI-mpls extc=
omm which has a split-horizon label to avoid such problem. I think also it =
depends on how your configure your router (in what order).<br />
In the case of PBB-EVPN, it is taken care by the nature of PBB.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Regards,<br />
<br />
<br />
<br />
Patrice<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
 <br />
<br />
<br />
<br />
<br />
Patrice Brissette<br />
<br />
TECHNICAL LEADER.ENGINEERING<br />
<br />
<br />
<br />
pbrisset@cisco.com<br />
<br />
Phone: +1 613 254 3336<br />
<br />
<br />
<br />
<br />
<br />
Cisco Systems Canada Co. / Les Systemes Cisco Canada CIE<br />
<br />
Canada<br />
<br />
Cisco.com<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
 Think before you print.<br />
<br />
<br />
<br />
This email may contain confidential and privileged material for the sole us=
e of the intended recipient. Any review, use, distribution or disclosure by=
 others is strictly prohibited. If you are not the intended recipient (or a=
uthorized to receive for the<br />
 recipient), please contact the sender by reply email and delete all copies=
 of this message.<br />
Please <br />
click here for Company Registration Information.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
From: BESS <bess-bounces@ietf.org> on behalf of sudeep g ggg <sudhinjacob@r=
ediffmail.com><br />
<br />
Date: Sunday, November 22, 2015 at 1:21 AM<br />
<br />
To: "bess@ietf.org" <bess@ietf.org><br />
<br />
Subject: [bess] REG: draft-mohanty-bess-evpn-df-election-02<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Respected Authors,<br />
<br />
<br />
<br />
I am having 2 use cases based on that, I have a couple of queries. Correct =
me if I am wrong or If I am missing something.Your input is highly apprecia=
ting.<br />
<br />
<br />
<br />
1. When a new PE comes in the MH segment.<br />
<br />
<br />
<br />
<br />
<br />
<br />
[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the rec=
eiving PEs also need to wait for 3 secs. But, ideally, a PE that is going f=
rom DF to non-DF or non-DF to non-DF should become the non-DF rightaway. On=
ly the<br />
 PE that is going DF really needs to wait for 3 secs. This is not explicitl=
y spelled out in the draft but we are thinking along these lines.<br />
<br />
<br />
<br />
Now, delay of BGP updates is not dependent on the above behavior. That depe=
nds on the network topology and queueing/processing at intermediate nodes.<=
br />
With HRW, a PE coming up will result in minimal disruption of the establish=
ed DF for various vlans (bundles) as opposed to RFC 7438 mod-based.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
2. When a PE is brought down due to MW(Maintenance window).<br />
<br />
<br />
<br />
<br />
<br />
<br />
[Satya] As per the HRW, if this PE was not the DF for a vlan (vlan-bundle) =
this should have no effect on the DF election.<br />
This is where it again performs better than the RFC 7438 modulo-based algor=
ithm.<br />
If this was the DF, then some other surviving PE, say PE' for which the Has=
h(PE', vlan) is maximum can become the PE right away on receiving the BGP w=
ithdraw.<br />
There is no need for a three second wait.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
As per the above use cases.There will be change in DF election process. And=
 for 3 seconds there is chance of transient loop.There is delay of bgp upda=
te received by each PE.Kindly let me know whether this is taken care.<br />
<br />
Moreover 3 seconds if the traffic is blocked in the network creates problem=
 for delay sensitive traffic like voice,images etc.<br />
<br />
<br />
<br />
May I know about your views in above cases.<br />
<br />
<br />
<br />
Regards,<br />
<br />
Sudhin<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Get your own<br />
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Know<br />
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<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
 <br />
 <br />
<br><Table border=3D0 Width=3D100% Height=3D57 cellspacing=3D0 cellpadding=
=3D0 style=3D"font-family:Verdana;font-size:11px;line-height:15px;"><TR><td=
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if; font-size:14px">Get your own <span style=3D"padding-bottom: 0px; backgr=
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--=_d95735746c26ddbdf54748867da7bddf--


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From: Antoni Przygienda <antoni.przygienda@ericsson.com>
To: sudeep g ggg <sudhinjacob@rediffmail.com>, "satyamoh@cisco.com" <satyamoh@cisco.com>
Thread-Topic: [bess] REG: draft-mohanty-bess-evpn-df-election-02
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Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02
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From nobody Tue Nov 24 01:03:35 2015
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From: Thomas Morin <thomas.morin@orange.com>
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Subject: [bess] Introducing a one-implementation requirement before WG last calls
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Hello everyone,

Following the positive feedback received during BESS meeting in Yokohama 
about introducing a one-implementation requirement in BESS, we propose 
to do the following for future WG last calls:

As a prerequisite before doing a working group last call on a document, 
the chairs will ask the working group for known implementations of the 
specifications; a relatively detailed level of information will be 
required (e.g. "release x.y of solution z shipping date d", "all 
features implemented", "partial implementation only", etc.) and everyone 
will be invited to reply (not only co-authors of the specifications); 
the chairs will then do the working group last call if satisfying 
information was provided on at least one implementation.

We are open for comments on this proposal until December 7th.

Martin & Thomas


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From: "Adrian Farrel" <adrian@olddog.co.uk>
To: "'Thomas Morin'" <thomas.morin@orange.com>, "'BESS'" <bess@ietf.org>
Date: Tue, 24 Nov 2015 16:07:26 -0000
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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Hi Thomas,

It's really hard to enter this discussion with any context.

Could you post the minutes from the meeting and maybe summarise the points in
favour of this approach?
(Of course, I can listen to the audio when I have some spare time.)

Thanks,
Adrian


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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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--94eb2c0b7cbea6cb0605254ce9e9
Content-Type: text/plain; charset=UTF-8

Building on Adrian's question, I'd be interested to learn more about why
the WG considers 1 implementation as a reasonable threshold. I.e. as
opposed to something like 2 or more, demonstrated interop/compliance, or
something along those lines.

Personally, I think the implementation requirement is a good idea in
principle. But the threshold doesn't seem to be adequate if the goal is an
interoperable specification. A document with only 1 implementation is more
akin to technical documentation rather than an interoperable specification.
But maybe there is a rationale that I'm failing to consider..?

Thanks,
-Benson



On Tue, Nov 24, 2015 at 11:07 AM, Adrian Farrel <adrian@olddog.co.uk> wrote:

> Hi Thomas,
>
> It's really hard to enter this discussion with any context.
>
> Could you post the minutes from the meeting and maybe summarise the points
> in
> favour of this approach?
> (Of course, I can listen to the audio when I have some spare time.)
>
> Thanks,
> Adrian
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>

--94eb2c0b7cbea6cb0605254ce9e9
Content-Type: text/html; charset=UTF-8
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<div dir=3D"ltr">Building on Adrian&#39;s question, I&#39;d be interested t=
o learn more about why the WG considers 1 implementation as a reasonable th=
reshold. I.e. as opposed to something like 2 or more, demonstrated interop/=
compliance, or something along those lines.=C2=A0<div><br></div><div>Person=
ally, I think the implementation requirement is a good idea in principle. B=
ut the threshold doesn&#39;t seem to be adequate if the goal is an interope=
rable specification. A document with only 1 implementation is more akin to =
technical documentation rather than an interoperable specification. But may=
be there is a rationale that I&#39;m failing to consider..?</div><div><br><=
/div><div>Thanks,</div><div>-Benson</div><div><br></div><div><br></div></di=
v><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue, Nov 24,=
 2015 at 11:07 AM, Adrian Farrel <span dir=3D"ltr">&lt;<a href=3D"mailto:ad=
rian@olddog.co.uk" target=3D"_blank">adrian@olddog.co.uk</a>&gt;</span> wro=
te:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-=
left:1px #ccc solid;padding-left:1ex">Hi Thomas,<br>
<br>
It&#39;s really hard to enter this discussion with any context.<br>
<br>
Could you post the minutes from the meeting and maybe summarise the points =
in<br>
favour of this approach?<br>
(Of course, I can listen to the audio when I have some spare time.)<br>
<br>
Thanks,<br>
Adrian<br>
<div class=3D"HOEnZb"><div class=3D"h5"><br>
_______________________________________________<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
</div></div></blockquote></div><br></div>

--94eb2c0b7cbea6cb0605254ce9e9--


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Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02
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Hi Sudeep,

I think when a new PE is brought up to a redundancy group, the related forw=
arding must be blocked.


Regards,

Patrice

   [http://www.cisco.com/web/europe/images/email/signature/est2014/logo_06.=
png?ct=3D1406640631632]

Patrice Brissette
TECHNICAL LEADER.ENGINEERING

pbrisset@cisco.com<mailto:pbrisset@cisco.com>
Phone: +1 613 254 3336


Cisco Systems Canada Co. / Les Systemes Cisco Canada CIE
Canada
Cisco.com<http://www.cisco.com/global/CA/>



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From: <sudhinjacob@rediffmail.com<mailto:sudhinjacob@rediffmail.com>> on be=
half of sudeep g ggg <sudhinjacob@rediffmail.com<mailto:sudhinjacob@rediffm=
ail.com>>
Date: Tuesday, November 24, 2015 at 12:20 AM
To: "Satya Mohanty (satyamoh)" <satyamoh@cisco.com<mailto:satyamoh@cisco.co=
m>>
Cc: Patrice Brissette <pbrisset@cisco.com<mailto:pbrisset@cisco.com>>, "bes=
s@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.org>>
Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02

Respected Satya,

Let me thank you for the mail. IT is much appreciated. May I request you to=
 look in to my reply named "sudhin". If this is already taken care my since=
re apologies for asking redundant question.

Regards,
Sudhin Jacob


1. When a new PE comes in the MH segment.


[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the rec=
eiving PEs also need to wait for 3 secs. But, ideally, a PE that is going f=
rom DF to non-DF or non-DF to non-DF should become the non-DF rightaway. On=
ly the PE that is going DF really needs to wait for 3 secs. This is not exp=
licitly spelled out in the draft but we are thinking along these lines.

Sudhin>> you are correct Satya but how to deal with traffic for 3 seconds w=
hen a new type 4 route comes. DF election kicks in and all PE's, For 3 seco=
nds how to deal with traffic, the state machines need to be updated like bl=
ocking traffic or forwarding. if during that time the traffic is forwarded =
then a loop will be created. the EVPN RFC says SH label and BUM drop after =
the election, but correct me if I am totally wrong during the transition ho=
w to deal is not covered.I request your valid input on this. How to deal in=
 that situation,what is the state of PE's during 3 seconds period.How to re=
ach a consensus between vendors. Say for example vendors design custom solu=
tion to handle this, then how the inter op between vendors will not work.


Now, delay of BGP updates is not dependent on the above behavior. That depe=
nds on the network topology and queueing/processing at intermediate nodes.
With HRW, a PE coming up will result in minimal disruption of the establish=
ed DF for various vlans (bundles) as opposed to RFC 7438 mod-based.



On Tue, 24 Nov 2015 08:55:20 +0530 "Satya Mohanty (satyamoh)" wrote
>




Hi Sudeep,



Please see inline [Satya].
Patrice, thanks for your observation.








From: BESS on behalf of "Patrice Brissette (pbrisset)"

Date: Monday, November 23, 2015 6:53 PM

To: sudeep g ggg , "bess@ietf.org<mailto:bess@ietf.org>"

Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02










Sudeep,



Why do you think there will be a loop? Per ES EAD route carry ESI-mpls extc=
omm which has a split-horizon label to avoid such problem. I think also it =
depends on how your configure your router (in what order).
In the case of PBB-EVPN, it is taken care by the nature of PBB.










Regards,



Patrice















Patrice Brissette

TECHNICAL LEADER.ENGINEERING



pbrisset@cisco.com<mailto:pbrisset@cisco.com>

Phone: +1 613 254 3336





Cisco Systems Canada Co. / Les Systemes Cisco Canada CIE

Canada

Cisco.com













Think before you print.



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uthorized to receive for the
recipient), please contact the sender by reply email and delete all copies =
of this message.
Please
click here for Company Registration Information.



















From: BESS on behalf of sudeep g ggg

Date: Sunday, November 22, 2015 at 1:21 AM

To: "bess@ietf.org<mailto:bess@ietf.org>"

Subject: [bess] REG: draft-mohanty-bess-evpn-df-election-02







Respected Authors,



I am having 2 use cases based on that, I have a couple of queries. Correct =
me if I am wrong or If I am missing something.Your input is highly apprecia=
ting.



1. When a new PE comes in the MH segment.






[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the rec=
eiving PEs also need to wait for 3 secs. But, ideally, a PE that is going f=
rom DF to non-DF or non-DF to non-DF should become the non-DF rightaway. On=
ly the
PE that is going DF really needs to wait for 3 secs. This is not explicitly=
 spelled out in the draft but we are thinking along these lines.



Now, delay of BGP updates is not dependent on the above behavior. That depe=
nds on the network topology and queueing/processing at intermediate nodes.
With HRW, a PE coming up will result in minimal disruption of the establish=
ed DF for various vlans (bundles) as opposed to RFC 7438 mod-based.









2. When a PE is brought down due to MW(Maintenance window).






[Satya] As per the HRW, if this PE was not the DF for a vlan (vlan-bundle) =
this should have no effect on the DF election.
This is where it again performs better than the RFC 7438 modulo-based algor=
ithm.
If this was the DF, then some other surviving PE, say PE' for which the Has=
h(PE', vlan) is maximum can become the PE right away on receiving the BGP w=
ithdraw.
There is no need for a three second wait.











As per the above use cases.There will be change in DF election process. And=
 for 3 seconds there is chance of transient loop.There is delay of bgp upda=
te received by each PE.Kindly let me know whether this is taken care.

Moreover 3 seconds if the traffic is blocked in the network creates problem=
 for delay sensitive traffic like voice,images etc.



May I know about your views in above cases.



Regards,

Sudhin
















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<div>
<div>
<div>Hi Sudeep,</div>
<div><br>
</div>
<div>I think when a new PE is brought up to a redundancy group, the related=
 forwarding must be blocked.&nbsp;</div>
<div>
<div><br>
</div>
<div><br>
</div>
<div>Regards,</div>
<div><br>
</div>
<div>Patrice<br>
<br>
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<a style=3D"color:#666666; text-decoration: none;" href=3D"mailto:pbrisset@=
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<span style=3D"font-weight:bold">From: </span>&lt;<a href=3D"mailto:sudhinj=
acob@rediffmail.com">sudhinjacob@rediffmail.com</a>&gt; on behalf of sudeep=
 g ggg &lt;<a href=3D"mailto:sudhinjacob@rediffmail.com">sudhinjacob@rediff=
mail.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Tuesday, November 24, 2015 at=
 12:20 AM<br>
<span style=3D"font-weight:bold">To: </span>&quot;Satya Mohanty (satyamoh)&=
quot; &lt;<a href=3D"mailto:satyamoh@cisco.com">satyamoh@cisco.com</a>&gt;<=
br>
<span style=3D"font-weight:bold">Cc: </span>Patrice Brissette &lt;<a href=
=3D"mailto:pbrisset@cisco.com">pbrisset@cisco.com</a>&gt;, &quot;<a href=3D=
"mailto:bess@ietf.org">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:bess@i=
etf.org">bess@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [bess] REG: draft-moha=
nty-bess-evpn-df-election-02<br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div>Respected Satya,<br>
<br>
Let me thank you for the mail. IT is much appreciated. May I request you to=
 look in to my reply named &quot;sudhin&quot;. If this is already taken car=
e my sincere apologies for asking redundant question.<br>
<br>
Regards,<br>
Sudhin Jacob<br>
<br>
<br>
1. When a new PE comes in the MH segment.<br>
<br>
<br>
[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the rec=
eiving PEs also need to wait for 3 secs. But, ideally, a PE that is going f=
rom DF to non-DF or non-DF to non-DF should become the non-DF rightaway. On=
ly the PE that is going DF really
 needs to wait for 3 secs. This is not explicitly spelled out in the draft =
but we are thinking along these lines.<br>
<br>
Sudhin&gt;&gt; you are correct Satya but how to deal with traffic for 3 sec=
onds when a new type 4 route comes. DF election kicks in and all PE's, For =
3 seconds how to deal with traffic, the state machines need to be updated l=
ike blocking traffic or forwarding. if
 during that time the traffic is forwarded then a loop will be created. the=
 EVPN RFC says SH label and BUM drop after the election, but correct me if =
I am totally wrong during the transition how to deal is not covered.I reque=
st your valid input on this. How
 to deal in that situation,what is the state of PE's during 3 seconds perio=
d.How to reach a consensus between vendors. Say for example vendors design =
custom solution to handle this, then how the inter op between vendors will =
not work.<br>
<br>
<br>
Now, delay of BGP updates is not dependent on the above behavior. That depe=
nds on the network topology and queueing/processing at intermediate nodes.<=
br>
With HRW, a PE coming up will result in minimal disruption of the establish=
ed DF for various vlans (bundles) as opposed to RFC 7438 mod-based.<br>
<br>
<br>
<br>
On Tue, 24 Nov 2015 08:55:20 &#43;0530 &quot;Satya Mohanty (satyamoh)&quot;=
 <satyamoh@cisco.com>
wrote<br>
&gt; <br>
<br>
<br>
<br>
<br>
Hi Sudeep,<br>
<br>
<br>
<br>
Please see inline [Satya].<br>
Patrice, thanks for your observation.<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
From: BESS <bess-bounces@ietf.org>on behalf of &quot;Patrice Brissette (pbr=
isset)&quot; <pbrisset@cisco.com>
<br>
<br>
Date: Monday, November 23, 2015 6:53 PM<br>
<br>
To: sudeep g ggg <sudhinjacob@rediffmail.com>, &quot;<a href=3D"mailto:bess=
@ietf.org">bess@ietf.org</a>&quot;
<bess@ietf.org><br>
<br>
Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
Sudeep,<br>
<br>
<br>
<br>
Why do you think there will be a loop? Per ES EAD route carry ESI-mpls extc=
omm which has a split-horizon label to avoid such problem. I think also it =
depends on how your configure your router (in what order).<br>
In the case of PBB-EVPN, it is taken care by the nature of PBB.<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
Regards,<br>
<br>
<br>
<br>
Patrice<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
Patrice Brissette<br>
<br>
TECHNICAL LEADER.ENGINEERING<br>
<br>
<br>
<br>
<a href=3D"mailto:pbrisset@cisco.com">pbrisset@cisco.com</a><br>
<br>
Phone: &#43;1 613 254 3336<br>
<br>
<br>
<br>
<br>
<br>
Cisco Systems Canada Co. / Les Systemes Cisco Canada CIE<br>
<br>
Canada<br>
<br>
Cisco.com<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
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<br>
<br>
<br>
<br>
Think before you print.<br>
<br>
<br>
<br>
This email may contain confidential and privileged material for the sole us=
e of the intended recipient. Any review, use, distribution or disclosure by=
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uthorized to receive for the<br>
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From: BESS <bess-bounces@ietf.org>on behalf of sudeep g ggg <sudhinjacob@re=
diffmail.com>
<br>
<br>
Date: Sunday, November 22, 2015 at 1:21 AM<br>
<br>
To: &quot;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&quot; <bess@ie=
tf.org><br>
<br>
Subject: [bess] REG: draft-mohanty-bess-evpn-df-election-02<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
Respected Authors,<br>
<br>
<br>
<br>
I am having 2 use cases based on that, I have a couple of queries. Correct =
me if I am wrong or If I am missing something.Your input is highly apprecia=
ting.<br>
<br>
<br>
<br>
1. When a new PE comes in the MH segment.<br>
<br>
<br>
<br>
<br>
<br>
<br>
[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the rec=
eiving PEs also need to wait for 3 secs. But, ideally, a PE that is going f=
rom DF to non-DF or non-DF to non-DF should become the non-DF rightaway. On=
ly the<br>
PE that is going DF really needs to wait for 3 secs. This is not explicitly=
 spelled out in the draft but we are thinking along these lines.<br>
<br>
<br>
<br>
Now, delay of BGP updates is not dependent on the above behavior. That depe=
nds on the network topology and queueing/processing at intermediate nodes.<=
br>
With HRW, a PE coming up will result in minimal disruption of the establish=
ed DF for various vlans (bundles) as opposed to RFC 7438 mod-based.<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
2. When a PE is brought down due to MW(Maintenance window).<br>
<br>
<br>
<br>
<br>
<br>
<br>
[Satya] As per the HRW, if this PE was not the DF for a vlan (vlan-bundle) =
this should have no effect on the DF election.<br>
This is where it again performs better than the RFC 7438 modulo-based algor=
ithm.<br>
If this was the DF, then some other surviving PE, say PE' for which the Has=
h(PE', vlan) is maximum can become the PE right away on receiving the BGP w=
ithdraw.<br>
There is no need for a three second wait.<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
As per the above use cases.There will be change in DF election process. And=
 for 3 seconds there is chance of transient loop.There is delay of bgp upda=
te received by each PE.Kindly let me know whether this is taken care.<br>
<br>
Moreover 3 seconds if the traffic is blocked in the network creates problem=
 for delay sensitive traffic like voice,images etc.<br>
<br>
<br>
<br>
May I know about your views in above cases.<br>
<br>
<br>
<br>
Regards,<br>
<br>
Sudhin<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
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From: Kishore Tiruveedhula <kishoret@juniper.net>
To: "Satya Mohanty (satyamoh)" <satyamoh@cisco.com>, "Patrice Brissette (pbrisset)" <pbrisset@cisco.com>, sudeep g ggg <sudhinjacob@rediffmail.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] REG: draft-mohanty-bess-evpn-df-election-02
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Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02
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--_000_D279E23942565kishoretjunipernet_
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 Please see below inline...[Kishore].

1. When a new PE comes in the MH segment.
[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the rec=
eiving PEs also need to wait for 3 secs. But, ideally, a PE that is going f=
rom DF to non-DF or non-DF to non-DF should become the non-DF rightaway. On=
ly the PE that is going DF really needs to wait for 3 secs. This is not exp=
licitly spelled out in the draft but we are thinking along these lines.

[Kishore]  Yes. The new PE need to wait for 3 seconds, but if new PE receiv=
es the type 4 route from the redundant PE before 3 seconds, the new PE can =
just move to DF immediately (if it becomes DF) just after receiving the typ=
e 4 without waiting for the 3 seconds timer expiry because the other redund=
ant PE might have moved to Non-DF as there is no 3 seconds timer on the oth=
er PE which is moving from DF to Non-DF.
It is good idea to explicitly spell out this in this draft.


[Satya] Now, delay of BGP updates is not dependent on the above behavior. T=
hat depends on the network topology and queueing/processing at intermediate=
 nodes.
With HRW,  a PE coming up will result in minimal disruption of the establis=
hed DF for various vlans (bundles) as opposed to RFC 7438 mod-based.

[Kishore] If the BGP update processing takes more time on one PE and receiv=
es less time from RR on the other PE, then it may be possible of both PE ma=
y become DF or Non-DF, so the timer value should be chosen large enough in =
this case.

Thanks,
Kishore


--_000_D279E23942565kishoretjunipernet_
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<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; font-size: 14px; font-family: Calibri, sans-seri=
f; ">
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"color: rgb(0, 0, 0); ">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
&nbsp;Please see below inline&#8230;[Kishore].&nbsp;</div>
</span></div>
</span><span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; font-size: 14px; font-family: Calibri, sans-seri=
f; ">
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"color: rgb(0, 0, 0); ">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<span id=3D"OLK_SRC_BODY_SECTION">
<div><br>
</div>
<div>1. When a new PE comes in the MH segment.</div>
</span></div>
</span>
<div><font color=3D"#0000ff">[Satya] Yes, New PE needs to wait for 3 sec. A=
ccording to RFC 7438, the receiving PEs also need to wait for 3 secs. But, =
ideally, a PE that is going from DF to non-DF or non-DF to non-DF should be=
come the non-DF rightaway. Only the
 PE that is going DF really needs to wait for 3 secs. This is not explicitl=
y spelled out in the draft but we are thinking along these lines.&nbsp;</fo=
nt></div>
</div>
</span>
<div><br>
</div>
<div>[Kishore] &nbsp;Yes. The new PE need to wait for 3 seconds, but if new=
 PE receives the type 4 route from the redundant PE before 3 seconds, the n=
ew PE can just move to DF immediately (if it becomes DF) just after receivi=
ng the type 4 without waiting for the
 3 seconds timer expiry because the other&nbsp;redundant PE might have move=
d to Non-DF as there is no 3 seconds timer on the other PE which is moving =
from DF to Non-DF.</div>
<div>It is good idea to explicitly spell out this in this draft.&nbsp;</div=
>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; font-size: 14px; font-family: Calibri, sans-seri=
f; ">
<div><font color=3D"#0000ff"><br>
</font></div>
<div><span style=3D"color: rgb(0, 0, 255);">[Satya]&nbsp;</span><font color=
=3D"#0000ff">Now, delay of BGP updates is not dependent on the above behavi=
or. That depends on the network topology and queueing/processing at interme=
diate nodes.</font></div>
<div><font color=3D"#0000ff">With HRW, &nbsp;a PE coming up will result in =
minimal disruption of the established DF for various vlans (bundles) as opp=
osed to RFC 7438 mod-based.&nbsp;</font></div>
</div>
</span>
<div><br>
</div>
<div>[Kishore] If the BGP update processing takes more time on one PE and r=
eceives less time from RR on the other PE, then it may be possible of both =
PE may become DF or Non-DF, so the timer value should be chosen large enoug=
h in this case. &nbsp;</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Kishore</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
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f; ">
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<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
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<div>
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<div>
<div></div>
</div>
</blockquote>
</span></div>
</div>
</blockquote>
</span></div>
</span>
</body>
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--_000_D279E23942565kishoretjunipernet_--


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From: "Satya Mohanty (satyamoh)" <satyamoh@cisco.com>
To: Kishore Tiruveedhula <kishoret@juniper.net>, "Patrice Brissette (pbrisset)" <pbrisset@cisco.com>, sudeep g ggg <sudhinjacob@rediffmail.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] REG: draft-mohanty-bess-evpn-df-election-02
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Date: Tue, 24 Nov 2015 22:11:49 +0000
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References: <20151122062113.4874.qmail@f4mail-235-118.rediffmail.com> <D2793AA4.7AAAF%pbrisset@cisco.com> <D27911B5.42813%satyamoh@cisco.com> <D279E239.42565%kishoret@juniper.net>
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Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02
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--_000_D27A1F0C429A5satyamohciscocom_
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Hi Kishore/Sudhin,

From: Kishore Tiruveedhula <kishoret@juniper.net<mailto:kishoret@juniper.ne=
t>>
Date: Tuesday, November 24, 2015 12:42 PM
To: smohanty mohanty <satyamoh@cisco.com<mailto:satyamoh@cisco.com>>, "Patr=
ice Brissette (pbrisset)" <pbrisset@cisco.com<mailto:pbrisset@cisco.com>>, =
sudeep g ggg <sudhinjacob@rediffmail.com<mailto:sudhinjacob@rediffmail.com>=
>, "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.or=
g>>
Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02

 Please see below inline...[Kishore].

1. When a new PE comes in the MH segment.
[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the rec=
eiving PEs also need to wait for 3 secs. But, ideally, a PE that is going f=
rom DF to non-DF or non-DF to non-DF should become the non-DF rightaway. On=
ly the PE that is going DF really needs to wait for 3 secs. This is not exp=
licitly spelled out in the draft but we are thinking along these lines.

[Kishore]  Yes. The new PE need to wait for 3 seconds, but if new PE receiv=
es the type 4 route from the redundant PE before 3 seconds, the new PE can =
just move to DF immediately (if it becomes DF) just after receiving the typ=
e 4 without waiting for the 3 seconds timer expiry because the other redund=
ant PE might have moved to Non-DF as there is no 3 seconds timer on the oth=
er PE which is moving from DF to Non-DF.
It is good idea to explicitly spell out this in this draft.
[Satya] Right. We will spell this out in the next version.


[Satya] Now, delay of BGP updates is not dependent on the above behavior. T=
hat depends on the network topology and queueing/processing at intermediate=
 nodes.
With HRW,  a PE coming up will result in minimal disruption of the establis=
hed DF for various vlans (bundles) as opposed to RFC 7438 mod-based.

[Kishore] If the BGP update processing takes more time on one PE and receiv=
es less time from RR on the other PE, then it may be possible of both PE ma=
y become DF or Non-DF, so the timer value should be chosen large enough in =
this case.
[Satya] The problem is there is no "cure-all" timer value that will guarant=
ee this behavior.
There was a ack based draft sometime back, but it would have introduced con=
siderable overhead that caused complications.

Thanks,
Kishore

Thanks,
--Satya

--_000_D27A1F0C429A5satyamohciscocom_
Content-Type: text/html; charset="iso-8859-1"
Content-ID: <55588C2B084FC04B8A12FC5B489CB053@emea.cisco.com>
Content-Transfer-Encoding: quoted-printable

<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; ">
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; color: rgb=
(0, 0, 0); ">
Hi Kishore/Sudhin,</div>
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; color: rgb=
(0, 0, 0); ">
<br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"font-family: Calibri, sans-serif=
; font-size: 14px; color: rgb(0, 0, 0); ">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>Kishore Tiruveedhula &lt;<a h=
ref=3D"mailto:kishoret@juniper.net">kishoret@juniper.net</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Tuesday, November 24, 2015 12=
:42 PM<br>
<span style=3D"font-weight:bold">To: </span>smohanty mohanty &lt;<a href=3D=
"mailto:satyamoh@cisco.com">satyamoh@cisco.com</a>&gt;, &quot;Patrice Briss=
ette (pbrisset)&quot; &lt;<a href=3D"mailto:pbrisset@cisco.com">pbrisset@ci=
sco.com</a>&gt;, sudeep g ggg &lt;<a href=3D"mailto:sudhinjacob@rediffmail.=
com">sudhinjacob@rediffmail.com</a>&gt;,
 &quot;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [bess] REG: draft-moha=
nty-bess-evpn-df-election-02<br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; font-size: 14px; font-family: Calibri, sans-seri=
f; ">
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"color: rgb(0, 0, 0); ">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
&nbsp;Please see below inline&#8230;[Kishore].&nbsp;</div>
</span></div>
</span><span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; font-size: 14px; font-family: Calibri, sans-seri=
f; ">
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"color: rgb(0, 0, 0); ">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<span id=3D"OLK_SRC_BODY_SECTION">
<div><br>
</div>
<div>1. When a new PE comes in the MH segment.</div>
</span></div>
</span>
<div><font color=3D"#0000ff">[Satya] Yes, New PE needs to wait for 3 sec. A=
ccording to RFC 7438, the receiving PEs also need to wait for 3 secs. But, =
ideally, a PE that is going from DF to non-DF or non-DF to non-DF should be=
come the non-DF rightaway. Only the
 PE that is going DF really needs to wait for 3 secs. This is not explicitl=
y spelled out in the draft but we are thinking along these lines.&nbsp;</fo=
nt></div>
</div>
</span>
<div><br>
</div>
<div>[Kishore] &nbsp;Yes. The new PE need to wait for 3 seconds, but if new=
 PE receives the type 4 route from the redundant PE before 3 seconds, the n=
ew PE can just move to DF immediately (if it becomes DF) just after receivi=
ng the type 4 without waiting for the
 3 seconds timer expiry because the other&nbsp;redundant PE might have move=
d to Non-DF as there is no 3 seconds timer on the other PE which is moving =
from DF to Non-DF.</div>
<div>It is good idea to explicitly spell out this in this draft.&nbsp;</div=
>
</div>
</div>
</blockquote>
</span>
<div><font color=3D"#0000ff"><font face=3D"Calibri,sans-serif">[Satya] Righ=
t. We will spell this out in the next version.</font></font></div>
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"font-family: Calibri, sans-serif=
; font-size: 14px; color: rgb(0, 0, 0); ">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; font-size: 14px; font-family: Calibri, sans-seri=
f; ">
<div><font color=3D"#0000ff"><br>
</font></div>
<div><span style=3D"color: rgb(0, 0, 255);">[Satya]&nbsp;</span><font color=
=3D"#0000ff">Now, delay of BGP updates is not dependent on the above behavi=
or. That depends on the network topology and queueing/processing at interme=
diate nodes.</font></div>
<div><font color=3D"#0000ff">With HRW, &nbsp;a PE coming up will result in =
minimal disruption of the established DF for various vlans (bundles) as opp=
osed to RFC 7438 mod-based.&nbsp;</font></div>
</div>
</span>
<div><br>
</div>
<div>[Kishore] If the BGP update processing takes more time on one PE and r=
eceives less time from RR on the other PE, then it may be possible of both =
PE may become DF or Non-DF, so the timer value should be chosen large enoug=
h in this case. &nbsp;</div>
</div>
</div>
</blockquote>
</span>
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; "><font co=
lor=3D"#0000ff">[Satya] The problem is there is no &quot;cure-all&quot; tim=
er value that will guarantee this behavior.&nbsp;</font></div>
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; "><font co=
lor=3D"#0000ff">There was a ack based draft sometime back, but it would hav=
e introduced considerable overhead that caused complications.</font></div>
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"font-family: Calibri, sans-serif=
; font-size: 14px; color: rgb(0, 0, 0); ">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<div><br>
</div>
<div>Thanks,</div>
<div>Kishore</div>
</div>
</div>
</blockquote>
</span>
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; color: rgb=
(0, 0, 0); ">
<br>
</div>
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; color: rgb=
(0, 0, 0); ">
Thanks,</div>
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; color: rgb=
(0, 0, 0); ">
--Satya</div>
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"font-family: Calibri, sans-serif=
; font-size: 14px; color: rgb(0, 0, 0); ">
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; font-size: 14px; font-family: Calibri, sans-seri=
f; ">
<span id=3D"OLK_SRC_BODY_SECTION" style=3D"color: rgb(0, 0, 0); ">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<span id=3D"OLK_SRC_BODY_SECTION">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div></div>
</div>
</blockquote>
</span></div>
</div>
</blockquote>
</span></div>
</span></div>
</div>
</span>
</body>
</html>

--_000_D27A1F0C429A5satyamohciscocom_--


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From: John E Drake <jdrake@juniper.net>
To: "Satya Mohanty (satyamoh)" <satyamoh@cisco.com>, Kishore Tiruveedhula <kishoret@juniper.net>, "Patrice Brissette (pbrisset)" <pbrisset@cisco.com>, sudeep g ggg <sudhinjacob@rediffmail.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] REG: draft-mohanty-bess-evpn-df-election-02
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Archived-At: <http://mailarchive.ietf.org/arch/msg/bess/xd4X_u9HnhBS-r1xU-r1sB140cY>
Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02
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Satya,

Why is this better than having all of the nodes attached to a given ES wait=
 for three seconds during which time all of the existing DF assignments rem=
ain in force?   I.e., what is wrong with the current behavior particularly =
since everything operates correctly during those three seconds?

Your draft is supposed to provide a clearer explanation of the current beha=
vior, not to change it.  This is an example of mission creep and I think it=
 is a mistake.

Yours Irrespectively,

John

From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Satya Mohanty (satya=
moh)
Sent: Tuesday, November 24, 2015 5:12 PM
To: Kishore Tiruveedhula; Patrice Brissette (pbrisset); sudeep g ggg; bess@=
ietf.org
Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02

Hi Kishore/Sudhin,

From: Kishore Tiruveedhula <kishoret@juniper.net<mailto:kishoret@juniper.ne=
t>>
Date: Tuesday, November 24, 2015 12:42 PM
To: smohanty mohanty <satyamoh@cisco.com<mailto:satyamoh@cisco.com>>, "Patr=
ice Brissette (pbrisset)" <pbrisset@cisco.com<mailto:pbrisset@cisco.com>>, =
sudeep g ggg <sudhinjacob@rediffmail.com<mailto:sudhinjacob@rediffmail.com>=
>, "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.or=
g>>
Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02

 Please see below inline...[Kishore].

1. When a new PE comes in the MH segment.
[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the rec=
eiving PEs also need to wait for 3 secs. But, ideally, a PE that is going f=
rom DF to non-DF or non-DF to non-DF should become the non-DF rightaway. On=
ly the PE that is going DF really needs to wait for 3 secs. This is not exp=
licitly spelled out in the draft but we are thinking along these lines.

[Kishore]  Yes. The new PE need to wait for 3 seconds, but if new PE receiv=
es the type 4 route from the redundant PE before 3 seconds, the new PE can =
just move to DF immediately (if it becomes DF) just after receiving the typ=
e 4 without waiting for the 3 seconds timer expiry because the other redund=
ant PE might have moved to Non-DF as there is no 3 seconds timer on the oth=
er PE which is moving from DF to Non-DF.
It is good idea to explicitly spell out this in this draft.
[Satya] Right. We will spell this out in the next version.


[Satya] Now, delay of BGP updates is not dependent on the above behavior. T=
hat depends on the network topology and queueing/processing at intermediate=
 nodes.
With HRW,  a PE coming up will result in minimal disruption of the establis=
hed DF for various vlans (bundles) as opposed to RFC 7438 mod-based.

[Kishore] If the BGP update processing takes more time on one PE and receiv=
es less time from RR on the other PE, then it may be possible of both PE ma=
y become DF or Non-DF, so the timer value should be chosen large enough in =
this case.
[Satya] The problem is there is no "cure-all" timer value that will guarant=
ee this behavior.
There was a ack based draft sometime back, but it would have introduced con=
siderable overhead that caused complications.

Thanks,
Kishore

Thanks,
--Satya

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<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Satya,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Why is this better than having all of=
 the nodes attached to a given ES wait for three seconds during which time =
all of the existing DF assignments remain in force?
 &nbsp;&nbsp;I.e., what is wrong with the current behavior particularly sin=
ce everything operates correctly during those three seconds?<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Your draft is supposed to provide a c=
learer explanation of the current behavior, not to change it.&nbsp; This is=
 an example of mission creep and I think it is a mistake.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> BESS [mailto:bess-bounces@ietf=
.org]
<b>On Behalf Of </b>Satya Mohanty (satyamoh)<br>
<b>Sent:</b> Tuesday, November 24, 2015 5:12 PM<br>
<b>To:</b> Kishore Tiruveedhula; Patrice Brissette (pbrisset); sudeep g ggg=
; bess@ietf.org<br>
<b>Subject:</b> Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi Kishore/Sudhin,<o:p></o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Kishore Tiruveedhula &lt;<a href=3D"mailto:kishoret=
@juniper.net">kishoret@juniper.net</a>&gt;<br>
<b>Date: </b>Tuesday, November 24, 2015 12:42 PM<br>
<b>To: </b>smohanty mohanty &lt;<a href=3D"mailto:satyamoh@cisco.com">satya=
moh@cisco.com</a>&gt;, &quot;Patrice Brissette (pbrisset)&quot; &lt;<a href=
=3D"mailto:pbrisset@cisco.com">pbrisset@cisco.com</a>&gt;, sudeep g ggg &lt=
;<a href=3D"mailto:sudhinjacob@rediffmail.com">sudhinjacob@rediffmail.com</=
a>&gt;,
 &quot;<a href=3D"mailto:bess@ietf.org">bess@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:bess@ietf.org">bess@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;Please see below inline&#8230;[Ki=
shore].&nbsp;<o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">1. When a new PE comes in the MH segmen=
t.<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:blue">[Satya] Yes, New PE needs to wait for 3 =
sec. According to RFC 7438, the receiving PEs also need to wait for 3 secs.=
 But, ideally, a PE that is going from DF to non-DF
 or non-DF to non-DF should become the non-DF rightaway. Only the PE that i=
s going DF really needs to wait for 3 secs. This is not explicitly spelled =
out in the draft but we are thinking along these lines.&nbsp;</span><span s=
tyle=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:b=
lack"><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">[Kishore] &nbsp;Yes. The new PE need to=
 wait for 3 seconds, but if new PE receives the type 4 route from the redun=
dant PE before 3 seconds, the new PE can just move
 to DF immediately (if it becomes DF) just after receiving the type 4 witho=
ut waiting for the 3 seconds timer expiry because the other&nbsp;redundant =
PE might have moved to Non-DF as there is no 3 seconds timer on the other P=
E which is moving from DF to Non-DF.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">It is good idea to explicitly spell out=
 this in this draft.&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif;color:blue">[Satya] Right. We will spell this out in the next version=
.</span><o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:blue">[Satya]&nbsp;Now, delay of BGP updates i=
s not dependent on the above behavior. That depends on the network topology=
 and queueing/processing at intermediate nodes.</span><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><o:p></o=
:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:blue">With HRW, &nbsp;a PE coming up will resu=
lt in minimal disruption of the established DF for various vlans (bundles) =
as opposed to RFC 7438 mod-based.&nbsp;</span><span style=3D"font-size:10.5=
pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><o:p></o:p></spa=
n></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">[Kishore] If the BGP update processing =
takes more time on one PE and receives less time from RR on the other PE, t=
hen it may be possible of both PE may become DF
 or Non-DF, so the timer value should be chosen large enough in this case. =
&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:blue">[Satya] The problem is there is no &quot=
;cure-all&quot; timer value that will guarantee this behavior.&nbsp;</span>=
<span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif"=
><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:blue">There was a ack based draft sometime bac=
k, but it would have introduced considerable overhead that caused complicat=
ions.</span><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;=
,sans-serif"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Kishore<o:p></o:p></span></p>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">--Satya<o:p></o:p></span></p>
</div>
</div>
</div>
</body>
</html>

--_000_SN1PR0501MB17098EB8F00F3CD7C2FF856FC7060SN1PR0501MB1709_--


From nobody Tue Nov 24 15:17:07 2015
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Date: Wed, 25 Nov 2015 00:16:59 +0100
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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Hi Adrian,

indeed, minutes should have been available sooner. situation has been 
corrected.

The basic motivation for this is simply to avoid (over)loading the iesg 
with documents that have no (and could possibly never have an) 
implementation. Or, at least, if every spec gets implemented, it is to 
prioritize them.

The discussion happened at the beginning of the meeting. It was on one 
of the slides I have presented as part of the WG status.

-m

Le 24/11/2015 17:07, Adrian Farrel a écrit :
> Hi Thomas,
>
> It's really hard to enter this discussion with any context.
>
> Could you post the minutes from the meeting and maybe summarise the points in
> favour of this approach?
> (Of course, I can listen to the audio when I have some spare time.)
>
> Thanks,
> Adrian
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>


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From: Antoni Przygienda <antoni.przygienda@ericsson.com>
To: Thomas Morin <thomas.morin@orange.com>, BESS <bess@ietf.org>
Thread-Topic: [bess] Introducing a one-implementation requirement before WG last	calls
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Subject: Re: [bess] Introducing a one-implementation requirement before WG last	calls
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+1  (I don't mean make it 1+1=3D2 implementations, I just say it's a very g=
ood new [and old ;-) ] idea ;-)=20

thanks=20

--- tony
_____________________________________________
"Simple, clear purpose and principles give rise to complex and intelligent =
behavior. Complex rules and regulations give rise to simple and stupid beha=
vior."=20
--- Dee Hock=20


> -----Original Message-----
> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Thomas Morin
> Sent: Tuesday, November 24, 2015 1:03 AM
> To: BESS
> Subject: [bess] Introducing a one-implementation requirement before WG
> last calls
>=20
> Hello everyone,
>=20
> Following the positive feedback received during BESS meeting in Yokohama
> about introducing a one-implementation requirement in BESS, we propose to
> do the following for future WG last calls:
>=20
> As a prerequisite before doing a working group last call on a document, t=
he
> chairs will ask the working group for known implementations of the
> specifications; a relatively detailed level of information will be requir=
ed (e.g.
> "release x.y of solution z shipping date d", "all features implemented",
> "partial implementation only", etc.) and everyone will be invited to repl=
y (not
> only co-authors of the specifications); the chairs will then do the worki=
ng
> group last call if satisfying information was provided on at least one
> implementation.
>=20
> We are open for comments on this proposal until December 7th.
>=20
> Martin & Thomas
>=20
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess


From nobody Tue Nov 24 16:11:26 2015
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To: Martin Vigoureux <martin.vigoureux@alcatel-lucent.com>, bess@ietf.org
References: <04a401d126d2$3791e170$a6b5a450$@olddog.co.uk> <5654EFEB.4000101@alcatel-lucent.com>
From: "Joel M. Halpern" <jmh@joelhalpern.com>
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Date: Tue, 24 Nov 2015 19:11:14 -0500
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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Without wanting to be pedantic, I would have expected to see discusison 
of this on the list, and determination that the list agreed with it. 
Discussion at the meeting is informative, but is not the basis for a WG 
decision.

I am also slightly concerned that the working group is creating a 
procedural bar (one that does seem reasonable to me) without buyin from 
the larger community.

Yours,
Joel

On 11/24/15 6:16 PM, Martin Vigoureux wrote:
> Hi Adrian,
>
> indeed, minutes should have been available sooner. situation has been
> corrected.
>
> The basic motivation for this is simply to avoid (over)loading the iesg
> with documents that have no (and could possibly never have an)
> implementation. Or, at least, if every spec gets implemented, it is to
> prioritize them.
>
> The discussion happened at the beginning of the meeting. It was on one
> of the slides I have presented as part of the WG status.
>
> -m
>
> Le 24/11/2015 17:07, Adrian Farrel a écrit :
>> Hi Thomas,
>>
>> It's really hard to enter this discussion with any context.
>>
>> Could you post the minutes from the meeting and maybe summarise the
>> points in
>> favour of this approach?
>> (Of course, I can listen to the audio when I have some spare time.)
>>
>> Thanks,
>> Adrian
>>
>> _______________________________________________
>> BESS mailing list
>> BESS@ietf.org
>> https://www.ietf.org/mailman/listinfo/bess
>>
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>


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From: "Adrian Farrel" <adrian@olddog.co.uk>
To: "'Martin Vigoureux'" <martin.vigoureux@alcatel-lucent.com>, <bess@ietf.org>
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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Yeah, thanks Martin.

The slide has...

=3D=3DRaising the bar?=3D=3D
=95 Some documents are being pushed to IESG but
without any implementation (plan) to support
them
=95 We are thinking of =93requiring=94 that at least one
implementation exists before handing the
document to IESG
=95 Thoughts?

The first bullet allows for a plan to implement, the second requires
implementation. The use of quotes in the second bullet suggests that you =
may be
considering that the requirement may be flexible. Obviously we have an =
opening
for discussion, but I wonder how you would decide when to be flexible.

The minutes are a good indication of the level of support you received =
in the
room, but not a deep discussion :-) There seems to be some confusion in =
the
discussion between expediting (or unblocking) I-Ds that have an =
implementation,
and delaying (or blocking) I-Ds that don't have implementations. While, =
in a
world of limited resources, the two things are related, ideally we are =
not
significantly gating the progress of one I-D because we are busy =
processing
another.

Now, I really, really support your motivation, viz. to reduce the =
pointless,
unreviewed, unnecessary, or substandard drafts being sent for =
publication. The
question is how to achieve that.

Adrian (still thinking about this)

> -----Original Message-----
> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Martin =
Vigoureux
> Sent: 24 November 2015 23:17
> To: bess@ietf.org
> Subject: Re: [bess] Introducing a one-implementation requirement =
before WG
> last calls
>=20
> Hi Adrian,
>=20
> indeed, minutes should have been available sooner. situation has been
> corrected.
>=20
> The basic motivation for this is simply to avoid (over)loading the =
iesg
> with documents that have no (and could possibly never have an)
> implementation. Or, at least, if every spec gets implemented, it is to
> prioritize them.
>=20
> The discussion happened at the beginning of the meeting. It was on one
> of the slides I have presented as part of the WG status.
>=20
> -m
>=20
> Le 24/11/2015 17:07, Adrian Farrel a =E9crit :
> > Hi Thomas,
> >
> > It's really hard to enter this discussion with any context.
> >
> > Could you post the minutes from the meeting and maybe summarise the =
points
> in
> > favour of this approach?
> > (Of course, I can listen to the audio when I have some spare time.)
> >
> > Thanks,
> > Adrian
> >
> > _______________________________________________
> > BESS mailing list
> > BESS@ietf.org
> > https://www.ietf.org/mailman/listinfo/bess
> >
>=20
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess


From nobody Tue Nov 24 16:19:51 2015
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References: <04a401d126d2$3791e170$a6b5a450$@olddog.co.uk> <5654EFEB.4000101@alcatel-lucent.com> <5654FCA2.5040304@joelhalpern.com>
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Cc: Martin Vigoureux <martin.vigoureux@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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I think this may be a useful "procedural bar" and if so then I'd like to
see it implemented in other WGs, too... And, to some extent, it may be
within the prerogative of the WG chairs. But I am also surprised by the
lack of discussion. And I don't see any substantial conversation documented
in the proceedings of the last meeting. I'd like to understand why this
threshold makes sense to the WG, assuming it does...
-Benson


On Tue, Nov 24, 2015 at 7:11 PM, Joel M. Halpern <jmh@joelhalpern.com>
wrote:

> Without wanting to be pedantic, I would have expected to see discusison o=
f
> this on the list, and determination that the list agreed with it.
> Discussion at the meeting is informative, but is not the basis for a WG
> decision.
>
> I am also slightly concerned that the working group is creating a
> procedural bar (one that does seem reasonable to me) without buyin from t=
he
> larger community.
>
> Yours,
> Joel
>
> On 11/24/15 6:16 PM, Martin Vigoureux wrote:
>
>> Hi Adrian,
>>
>> indeed, minutes should have been available sooner. situation has been
>> corrected.
>>
>> The basic motivation for this is simply to avoid (over)loading the iesg
>> with documents that have no (and could possibly never have an)
>> implementation. Or, at least, if every spec gets implemented, it is to
>> prioritize them.
>>
>> The discussion happened at the beginning of the meeting. It was on one
>> of the slides I have presented as part of the WG status.
>>
>> -m
>>
>> Le 24/11/2015 17:07, Adrian Farrel a =C3=A9crit :
>>
>>> Hi Thomas,
>>>
>>> It's really hard to enter this discussion with any context.
>>>
>>> Could you post the minutes from the meeting and maybe summarise the
>>> points in
>>> favour of this approach?
>>> (Of course, I can listen to the audio when I have some spare time.)
>>>
>>> Thanks,
>>> Adrian
>>>
>>> _______________________________________________
>>> BESS mailing list
>>> BESS@ietf.org
>>> https://www.ietf.org/mailman/listinfo/bess
>>>
>>>
>> _______________________________________________
>> BESS mailing list
>> BESS@ietf.org
>> https://www.ietf.org/mailman/listinfo/bess
>>
>>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>

--001a11421c0881ab930525526af8
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">I think this may be a useful &quot;procedural bar&quot; an=
d if so then I&#39;d like to see it implemented in other WGs, too... And, t=
o some extent, it may be within the prerogative of the WG chairs. But I am =
also surprised by the lack of discussion. And I don&#39;t see any substanti=
al conversation documented in the proceedings of the last meeting. I&#39;d =
like to understand why this threshold makes sense to the WG, assuming it do=
es...<div>-Benson</div><div><br></div></div><div class=3D"gmail_extra"><br>=
<div class=3D"gmail_quote">On Tue, Nov 24, 2015 at 7:11 PM, Joel M. Halpern=
 <span dir=3D"ltr">&lt;<a href=3D"mailto:jmh@joelhalpern.com" target=3D"_bl=
ank">jmh@joelhalpern.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmai=
l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left=
:1ex">Without wanting to be pedantic, I would have expected to see discusis=
on of this on the list, and determination that the list agreed with it. Dis=
cussion at the meeting is informative, but is not the basis for a WG decisi=
on.<br>
<br>
I am also slightly concerned that the working group is creating a procedura=
l bar (one that does seem reasonable to me) without buyin from the larger c=
ommunity.<br>
<br>
Yours,<br>
Joel<br>
<br>
On 11/24/15 6:16 PM, Martin Vigoureux wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Hi Adrian,<br>
<br>
indeed, minutes should have been available sooner. situation has been<br>
corrected.<br>
<br>
The basic motivation for this is simply to avoid (over)loading the iesg<br>
with documents that have no (and could possibly never have an)<br>
implementation. Or, at least, if every spec gets implemented, it is to<br>
prioritize them.<br>
<br>
The discussion happened at the beginning of the meeting. It was on one<br>
of the slides I have presented as part of the WG status.<br>
<br>
-m<br>
<br>
Le 24/11/2015 17:07, Adrian Farrel a =C3=A9crit :<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Hi Thomas,<br>
<br>
It&#39;s really hard to enter this discussion with any context.<br>
<br>
Could you post the minutes from the meeting and maybe summarise the<br>
points in<br>
favour of this approach?<br>
(Of course, I can listen to the audio when I have some spare time.)<br>
<br>
Thanks,<br>
Adrian<br>
<br>
_______________________________________________<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org" target=3D"_blank">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
<br>
</blockquote>
<br>
_______________________________________________<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org" target=3D"_blank">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
<br>
</blockquote>
<br>
_______________________________________________<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org" target=3D"_blank">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
</blockquote></div><br></div>

--001a11421c0881ab930525526af8--


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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Joel,

> I am also slightly concerned that the working group is creating a
> procedural bar (one that does seem reasonable to me) without buyin from
> the larger community.

To be clear, the WG is allowed to make a decision to do this.
http://datatracker.ietf.org/doc/rfc4794/

Adrian




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Cc: pbrisset@cisco.com, bess@ietf.org, kishoret@juniper.net
Subject: Re: [bess] =?utf-8?q?REG=3A_draft-mohanty-bess-evpn-df-election-02?=
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Hi Satya,

Let me thank you for your mail,it is much appreciated.You will take this in to account in next revision, much appreciated so that all will be in same page. One more thought though just a random thought.I would like to bring your kind attention.Since section 7.1 you clearly explains that you are not taking in to consideration about vlan mis configuration. My thought 
requires no answers from your side.But I would like to bring one case in to your frame of mind just sharing it.Once again big thank you for your reply.

Section 7.1

 Observe that currently the VLANs are derived from local configuration
and the FSM does not provide any protection against misconfiguration
where same EVI,ESI combination has different set of VLANs on
different participating PEs or one of the PEs elects to consider
VLANs as VLAN bundle and another as separate VLANs for election
purposes (service type mismatch).

for example PE1 loopback 150.1.1.1 PE2 loopback 150.1.2.2

PE1 has vlan 2,3,4 PE2 has vlan 3,4

so DF election at present V mod N so PE1 will be DF in PE1 calculation.
in PE2 DF calculation V mod N. PE2 will be DF. So in short both PE will be DF for a EVI.

Regards,
Sudhin Jacob



On Wed, 25 Nov 2015 03:42:00 +0530 "Satya Mohanty (satyamoh)"  wrote
> 


 


Hi Kishore/Sudhin,






From: Kishore Tiruveedhula 

Date: Tuesday, November 24, 2015 12:42 PM

To: smohanty mohanty , "Patrice Brissette (pbrisset)" , sudeep g ggg ,
 "bess@ietf.org" 

Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02












Please see below inline…[Kishore].









1. When a new PE comes in the MH segment.


[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the receiving PEs also need to wait for 3 secs. But, ideally, a PE that is going from DF to non-DF or non-DF to non-DF should become the non-DF rightaway. Only the
 PE that is going DF really needs to wait for 3 secs. This is not explicitly spelled out in the draft but we are thinking along these lines.





[Kishore] Yes. The new PE need to wait for 3 seconds, but if new PE receives the type 4 route from the redundant PE before 3 seconds, the new PE can just move to DF immediately (if it becomes DF) just after receiving the type 4 without waiting for the
 3 seconds timer expiry because the otherredundant PE might have moved to Non-DF as there is no 3 seconds timer on the other PE which is moving from DF to Non-DF.
It is good idea to explicitly spell out this in this draft.




[Satya] Right. We will spell this out in the next version.












[Satya]Now, delay of BGP updates is not dependent on the above behavior. That depends on the network topology and queueing/processing at intermediate nodes.
With HRW, a PE coming up will result in minimal disruption of the established DF for various vlans (bundles) as opposed to RFC 7438 mod-based.





[Kishore] If the BGP update processing takes more time on one PE and receives less time from RR on the other PE, then it may be possible of both PE may become DF or Non-DF, so the timer value should be chosen large enough in this case. 




[Satya] The problem is there is no "cure-all" timer value that will guarantee this behavior.
There was a ack based draft sometime back, but it would have introduced considerable overhead that caused complications.







Thanks,
Kishore









Thanks,

--Satya






















 
 
_______________________________________________

BESS mailing list

BESS@ietf.org

https://www.ietf.org/mailman/listinfo/bess


--=_4d4c9654e020fe5730122663151b19dc
Content-Transfer-Encoding: quoted-printable
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Hi Satya,<br />
<br />
Let me thank you for your mail,it is much appreciated.You will take this in=
 to account in next revision, much appreciated so that all will be in same =
page. One more thought though just a random thought.I would like to bring y=
our kind attention.Since section 7.1 you clearly explains that you are not =
taking in to consideration about vlan mis configuration. My thought <br />
requires no answers from your side.But I would like to bring one case in to=
 your frame of mind just sharing it.Once again big thank you for your reply=
.<br />
<br />
Section 7.1<br />
<br />
 Observe that currently the VLANs are derived from local configuration<br /=
>
and the FSM does not provide any protection against misconfiguration<br />
where same EVI,ESI combination has different set of VLANs on<br />
different participating PEs or one of the PEs elects to consider<br />
VLANs as VLAN bundle and another as separate VLANs for election<br />
purposes (service type mismatch).<br />
<br />
for example PE1 loopback 150.1.1.1 PE2 loopback 150.1.2.2<br />
<br />
PE1 has vlan 2,3,4 PE2 has vlan 3,4<br />
<br />
so DF election at present V mod N so PE1 will be DF in PE1 calculation.<br =
/>
in PE2 DF calculation V mod N. PE2 will be DF. So in short both PE will be =
DF for a EVI.<br />
<br />
Regards,<br />
Sudhin Jacob<br />
<br />
<br />
<br />
On Wed, 25 Nov 2015 03:42:00 +0530 "Satya Mohanty (satyamoh)" <satyamoh@cis=
co.com> wrote<br />
> <br />
<br />
<br />
 <br />
<br />
<br />
Hi Kishore/Sudhin,<br />
<br />
<br />
<br />
<br />
<br />
<br />
From: Kishore Tiruveedhula <kishoret@juniper.net><br />
<br />
Date: Tuesday, November 24, 2015 12:42 PM<br />
<br />
To: smohanty mohanty <satyamoh@cisco.com>, "Patrice Brissette (pbrisset)" <=
pbrisset@cisco.com>, sudeep g ggg <sudhinjacob@rediffmail.com>,<br />
 "bess@ietf.org" <bess@ietf.org><br />
<br />
Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Please see below inline=E2=80=A6[Kishore].<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
1. When a new PE comes in the MH segment.<br />
<br />
<br />
[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the rec=
eiving PEs also need to wait for 3 secs. But, ideally, a PE that is going f=
rom DF to non-DF or non-DF to non-DF should become the non-DF rightaway. On=
ly the<br />
 PE that is going DF really needs to wait for 3 secs. This is not explicitl=
y spelled out in the draft but we are thinking along these lines.<br />
<br />
<br />
<br />
<br />
<br />
[Kishore] Yes. The new PE need to wait for 3 seconds, but if new PE receive=
s the type 4 route from the redundant PE before 3 seconds, the new PE can j=
ust move to DF immediately (if it becomes DF) just after receiving the type=
 4 without waiting for the<br />
 3 seconds timer expiry because the otherredundant PE might have moved to N=
on-DF as there is no 3 seconds timer on the other PE which is moving from D=
F to Non-DF.<br />
It is good idea to explicitly spell out this in this draft.<br />
<br />
<br />
<br />
<br />
[Satya] Right. We will spell this out in the next version.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
[Satya]Now, delay of BGP updates is not dependent on the above behavior. Th=
at depends on the network topology and queueing/processing at intermediate =
nodes.<br />
With HRW, a PE coming up will result in minimal disruption of the establish=
ed DF for various vlans (bundles) as opposed to RFC 7438 mod-based.<br />
<br />
<br />
<br />
<br />
<br />
[Kishore] If the BGP update processing takes more time on one PE and receiv=
es less time from RR on the other PE, then it may be possible of both PE ma=
y become DF or Non-DF, so the timer value should be chosen large enough in =
this case. <br />
<br />
<br />
<br />
<br />
[Satya] The problem is there is no "cure-all" timer value that will guarant=
ee this behavior.<br />
There was a ack based draft sometime back, but it would have introduced con=
siderable overhead that caused complications.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Thanks,<br />
Kishore<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Thanks,<br />
<br />
--Satya<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
 <br />
 <br />
_______________________________________________<br />
<br />
BESS mailing list<br />
<br />
BESS@ietf.org<br />
<br />
https://www.ietf.org/mailman/listinfo/bess<br />
<br />
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From: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>
To: sudeep g ggg <sudhinjacob@rediffmail.com>, "satyamoh@cisco.com" <satyamoh@cisco.com>
Thread-Topic: [bess] REG: draft-mohanty-bess-evpn-df-election-02
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From: Haoweiguo <haoweiguo@huawei.com>
To: "Ali Sajassi (sajassi)" <sajassi@cisco.com>, "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>
Thread-Topic: [bess] One question about Route-type2 usage in EVPN base protocol
Thread-Index: AQHRI+++hAE8JLFDy0CwLu06Rs9qSJ6qCCgAgAKunV4=
Date: Wed, 25 Nov 2015 12:47:49 +0000
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Subject: Re: [bess] One question about Route-type2 usage in EVPN base protocol
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Hi Ali,
Thanks for your explanation. Yes, it=92s clear for route-type2 message usag=
e. For data plane MAC learning, CE=92s MAC will be announced through two me=
ssages w/o IP address respectively.
 I also have another similar question for IP address announcement here. Whe=
n each EVPN PE acts as distributed layer 3 gateway, the PE will learn ARP t=
ables for local connecting CEs. Each PE will synchronize these ARP tables t=
hrough route-type2 message to other remote PEs for ARP Proxy. For inter-sub=
net traffic forwarding, the remote PEs can populate the IP addresses includ=
ed in the route-type2 message to local IP routing table. But in some vendor=
=92s implementation, each PE will also announce local CE=92s IP address to =
other remote PEs through route-type5 message.
Question: Should only route-type2 message or both route-type2 and route-typ=
e5 messages be announced for local connecting CE=92s IP address on each EVP=
N PE in distributed layer 3 gateway scenario? Should it be further clarifie=
d in related drafts? Your clarifications are appreciated.

Thanks,

weiguo

________________________________
From: Ali Sajassi (sajassi) [sajassi@cisco.com]
Sent: Tuesday, November 24, 2015 6:49
To: Rabadan, Jorge (Jorge); Haoweiguo
Cc: bess@ietf.org
Subject: Re: [bess] One question about Route-type2 usage in EVPN base proto=
col


Hi Weiguo,

Section 10 of RFC 7432 covers this topic nicely. As Jorge alluded to, wheth=
er a PE only sends a single Route-Type-2 or two of them, depends on whether=
 the MAC learning is done in control-plane/management-plane or it is done i=
n data-plane. If it is the former, then only a single Route-Type-2 is sent =
and if it is the latter, then two are sent.

Cheers,
Ali

From: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com<mailto:jor=
ge.rabadan@alcatel-lucent.com>>
Date: Saturday, November 21, 2015 at 9:01 AM
To: Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>, Cisco Em=
ployee <sajassi@cisco.com<mailto:sajassi@cisco.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: Re: [bess] One question about Route-type2 usage in EVPN base proto=
col

Hi Weiguo,

I would recommend you to check out the L2VPN archives=85 we discussed this =
at length.
For instance:
http://www.ietf.org/mail-archive/web/l2vpn/current/msg04519.html

But check the other emails in the thread.
Sending one or two routes, really depend on how the learning is done.

Hope it helps.
Thanks.
Jorge

From: BESS <bess-bounces@ietf.org<mailto:bess-bounces@ietf.org>> on behalf =
of Haoweiguo <haoweiguo@huawei.com<mailto:haoweiguo@huawei.com>>
Date: Thursday, November 19, 2015 at 1:37 AM
To: "sajassi@cisco.com<mailto:sajassi@cisco.com>" <sajassi@cisco.com<mailto=
:sajassi@cisco.com>>
Cc: "bess@ietf.org<mailto:bess@ietf.org>" <bess@ietf.org<mailto:bess@ietf.o=
rg>>
Subject: [bess] One question about Route-type2 usage in EVPN base protocol

Hi Co-authors,
Through ARP process, each EVPN PE can learn local connecting CE=92s MAC and=
 IP correspondence, and will notify the MAC and IP association to all remot=
e PEs through Route-type2 message. Theoretically, each remote PE can rely o=
n the single route-type2 message to populate local Mac VRF(MAC table) , ARP=
 Cache and IP VRF(IP routing table) at the same time. However, some vendor =
doesn=92t do in this way. In its implementation, each PE will notify two ro=
ute-type2 message to remote PEs, one message(say message 1) only carry MAC =
information(IP field is invalid), another message(say message 2) carry MAC =
and IP association information. The remote PEs rely on message 1 to populat=
e local MAC VRF, and rely on message 2 to populate local ARP Cache and IP V=
RF.


I think EVPN protocol should give a clear suggestion for route type-2 messa=
ge usage, what=92s the scenario to announce only one message and what=92s s=
cenario to announce two messages?



Thanks,

weiguo

--_000_DD5FC8DE455C3348B94340C0AB5517334F8EB5F3nkgeml501mbschi_
Content-Type: text/html; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

<html dir=3D"ltr">
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
</head>
<body style=3D"FONT-FAMILY: Calibri,sans-serif; WORD-WRAP: break-word; COLO=
R: rgb(0,0,0); FONT-SIZE: 14px" fPStyle=3D"1" ocsi=3D"0">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">
<p><font size=3D"3">Hi Ali,</font></p>
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span lang=3D"EN-US">T=
hanks for your explanation. Yes, it=92s clear for route-type2 message usage=
. For data plane MAC learning, CE=92s MAC will be announced through two mes=
sages w/o IP address respectively.</span></p>
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span lang=3D"EN-US"><=
span style=3D"mso-spacerun: yes">&nbsp;</span>I also have another similar q=
uestion for IP address announcement here. When each EVPN PE acts as distrib=
uted layer 3 gateway, the PE will learn ARP tables
 for local connecting CEs. Each PE will synchronize these ARP tables throug=
h route-type2 message to other remote PEs for ARP Proxy. For inter-subnet t=
raffic forwarding, the remote PEs can populate the IP addresses included in=
 the route-type2 message to local
 IP routing table. But in some vendor=92s implementation, each PE will also=
 announce local CE=92s IP address to other remote PEs through route-type5 m=
essage.</span></p>
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span lang=3D"EN-US">Q=
uestion: Should only route-type2 message or both route-type2 and route-type=
5 messages be announced for local connecting CE=92s IP address on each EVPN=
 PE in distributed layer 3 gateway scenario?
 Should it be further clarified in related drafts? Your clarifications are =
appreciated.</span></p>
<p>Thanks,</p>
<p>weiguo</p>
<div style=3D"FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px=
">
<hr tabindex=3D"-1">
<div style=3D"DIRECTION: ltr" id=3D"divRpF331326"><font color=3D"#000000" s=
ize=3D"2" face=3D"Tahoma"><b>From:</b> Ali Sajassi (sajassi) [sajassi@cisco=
.com]<br>
<b>Sent:</b> Tuesday, November 24, 2015 6:49<br>
<b>To:</b> Rabadan, Jorge (Jorge); Haoweiguo<br>
<b>Cc:</b> bess@ietf.org<br>
<b>Subject:</b> Re: [bess] One question about Route-type2 usage in EVPN bas=
e protocol<br>
</font><br>
</div>
<div></div>
<div>
<div><br>
</div>
<div>Hi Weiguo,</div>
<div><br>
</div>
<div>Section 10 of RFC 7432 covers this topic nicely. As Jorge alluded to, =
whether a PE only sends a single Route-Type-2 or two of them, depends on wh=
ether the MAC learning is done in control-plane/management-plane or it is d=
one in data-plane. If it is the
 former, then only a single Route-Type-2 is sent and if it is the latter, t=
hen two are sent.&nbsp;</div>
<div><br>
</div>
<div>Cheers,</div>
<div>Ali&nbsp;</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"BORDER-BOTTOM: medium none; TEXT-ALIGN: left; BORDER-LEFT: me=
dium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; FONT=
-FAMILY: Lucida Grande; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #b5c4df =
1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"FONT-WEIGHT: bold">From: </span>&quot;Rabadan, Jorge (Jorge)=
&quot; &lt;<a href=3D"mailto:jorge.rabadan@alcatel-lucent.com" target=3D"_b=
lank">jorge.rabadan@alcatel-lucent.com</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Date: </span>Saturday, November 21, 2015 =
at 9:01 AM<br>
<span style=3D"FONT-WEIGHT: bold">To: </span>Haoweiguo &lt;<a href=3D"mailt=
o:haoweiguo@huawei.com" target=3D"_blank">haoweiguo@huawei.com</a>&gt;, Cis=
co Employee &lt;<a href=3D"mailto:sajassi@cisco.com" target=3D"_blank">saja=
ssi@cisco.com</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Cc: </span>&quot;<a href=3D"mailto:bess@i=
etf.org" target=3D"_blank">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:be=
ss@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Subject: </span>Re: [bess] One question a=
bout Route-type2 usage in EVPN base protocol<br>
</div>
<div><br>
</div>
<div>
<div style=3D"FONT-FAMILY: Avenir,sans-serif; WORD-WRAP: break-word; COLOR:=
 rgb(0,0,0); FONT-SIZE: 15px">
<div>
<div>
<div>Hi Weiguo,</div>
<div><br>
</div>
<div>I would recommend you to check out the L2VPN archives=85 we discussed =
this at length.</div>
<div>For instance:</div>
<div><a href=3D"http://www.ietf.org/mail-archive/web/l2vpn/current/msg04519=
.html" target=3D"_blank">http://www.ietf.org/mail-archive/web/l2vpn/current=
/msg04519.html</a></div>
<div><br>
</div>
<div>But check the other emails in the thread.</div>
<div>Sending one or two routes, really depend on how the learning is done.&=
nbsp;</div>
<div><br>
</div>
<div>Hope it helps.</div>
<div>Thanks.</div>
<div>Jorge</div>
<div>
<div id=3D"MAC_OUTLOOK_SIGNATURE"></div>
</div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"BORDER-BOTTOM: medium none; TEXT-ALIGN: left; BORDER-LEFT: me=
dium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; FONT=
-FAMILY: Calibri; COLOR: black; FONT-SIZE: 12pt; BORDER-TOP: #b5c4df 1pt so=
lid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"FONT-WEIGHT: bold">From: </span>BESS &lt;<a href=3D"mailto:b=
ess-bounces@ietf.org" target=3D"_blank">bess-bounces@ietf.org</a>&gt; on be=
half of Haoweiguo &lt;<a href=3D"mailto:haoweiguo@huawei.com" target=3D"_bl=
ank">haoweiguo@huawei.com</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Date: </span>Thursday, November 19, 2015 =
at 1:37 AM<br>
<span style=3D"FONT-WEIGHT: bold">To: </span>&quot;<a href=3D"mailto:sajass=
i@cisco.com" target=3D"_blank">sajassi@cisco.com</a>&quot; &lt;<a href=3D"m=
ailto:sajassi@cisco.com" target=3D"_blank">sajassi@cisco.com</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Cc: </span>&quot;<a href=3D"mailto:bess@i=
etf.org" target=3D"_blank">bess@ietf.org</a>&quot; &lt;<a href=3D"mailto:be=
ss@ietf.org" target=3D"_blank">bess@ietf.org</a>&gt;<br>
<span style=3D"FONT-WEIGHT: bold">Subject: </span>[bess] One question about=
 Route-type2 usage in EVPN base protocol<br>
</div>
<div><br>
</div>
<blockquote style=3D"BORDER-LEFT: #b5c4df 5px solid; PADDING-BOTTOM: 0px; M=
ARGIN: 0px 0px 0px 5px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; PADDING-TOP:=
 0px" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div dir=3D"ltr"><style id=3D"owaParaStyle">P {
	MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
P {
	MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
</style>
<div>
<div style=3D"FONT-FAMILY: Tahoma; DIRECTION: ltr; COLOR: #000000; FONT-SIZ=
E: 10pt">
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span lang=3D"EN-US"><=
font size=3D"3" face=3D"Times New Roman">Hi Co-authors,</font></span></p>
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span lang=3D"EN-US"><=
font size=3D"3" face=3D"Times New Roman">Through ARP process, each EVPN PE =
can learn local connecting CE=92s MAC and IP correspondence, and will notif=
y the MAC and IP association to all remote PEs
 through Route-type2 message. Theoretically, each remote PE can rely on the=
 single route-type2 message to populate local Mac VRF(MAC table) , ARP Cach=
e and IP VRF(IP routing table) at the same time. However, some vendor doesn=
=92t do in this way. In its implementation,
 each PE will notify two route-type2 message to remote PEs, one message(say=
 message 1) only carry MAC information(IP field is invalid), another messag=
e(say message 2) carry MAC and IP association information. The remote PEs r=
ely on message 1 to populate local
 MAC VRF, and rely on message 2 to populate local ARP Cache and IP VRF.</fo=
nt></span></p>
<p style=3D"MARGIN: 0cm 0cm 0pt" class=3D"MsoNormal"><span lang=3D"EN-US"><=
font size=3D"3" face=3D"Times New Roman"></font></span>&nbsp;</p>
<p><span style=3D"LINE-HEIGHT: 150%; FONT-FAMILY: 'Times New Roman',serif; =
FONT-SIZE: 10.5pt" lang=3D"EN-US"><font size=3D"3">I think EVPN protocol sh=
ould give a clear suggestion for route type-2 message usage, what=92s the s=
cenario to announce only one message and
 what=92s scenario to announce two messages?</font></span></p>
<p><span style=3D"LINE-HEIGHT: 150%; FONT-FAMILY: 'Times New Roman',serif; =
FONT-SIZE: 10.5pt" lang=3D"EN-US"></span>&nbsp;</p>
<p><span style=3D"LINE-HEIGHT: 150%; FONT-FAMILY: 'Times New Roman',serif; =
FONT-SIZE: 10.5pt" lang=3D"EN-US"><font size=3D"3">Thanks,</font></span></p=
>
<p><span style=3D"LINE-HEIGHT: 150%; FONT-FAMILY: 'Times New Roman',serif; =
FONT-SIZE: 10.5pt" lang=3D"EN-US"><font size=3D"3">weiguo</font></span></p>
</div>
</div>
</div>
</blockquote>
</span></div>
</div>
</span></div>
</div>
</div>
</body>
</html>

--_000_DD5FC8DE455C3348B94340C0AB5517334F8EB5F3nkgeml501mbschi_--


From nobody Wed Nov 25 05:04:38 2015
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Subject: Re: [bess] =?utf-8?q?REG=3A_draft-mohanty-bess-evpn-df-election-02?=
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Hi Jorge,

Let me thank you for the mail. Since this mail thread is for one particular draft. I think it is good to open a new thread for discussing another draft. May I request you to give me some time to go through it and  I get back.I will open a new thread for discussing your draft.Appreciate your support.

Regards,
Sudhin Jacob

On Wed, 25 Nov 2015 16:29:29 +0530 "Rabadan, Jorge (Jorge)"  wrote
> 


 



Hi Sudhin,



You may want to have a look at this draft:
https://tools.ietf.org/html/draft-rabadan-bess-evpn-ac-df-02



Provides a solution for your use-case in EVPN, without any control plane changes compared to RFC7432.
There are already implementations doing that.



Thanks.
Jorge










From: BESS  on behalf of sudeep g ggg 

Date: Wednesday, November 25, 2015 at 11:18 AM

To: "satyamoh@cisco.com" 

Cc: "pbrisset@cisco.com" , "bess@ietf.org" ,
 "kishoret@juniper.net" 

Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02







Hi Satya,



Let me thank you for your mail,it is much appreciated.You will take this in to account in next revision, much appreciated so that all will be in same page. One more thought though just a random thought.I would like to bring your kind attention.Since section
 7.1 you clearly explains that you are not taking in to consideration about vlan mis configuration. My thought


requires no answers from your side.But I would like to bring one case in to your frame of mind just sharing it.Once again big thank you for your reply.



Section 7.1



Observe that currently the VLANs are derived from local configuration

and the FSM does not provide any protection against misconfiguration

where same EVI,ESI combination has different set of VLANs on

different participating PEs or one of the PEs elects to consider

VLANs as VLAN bundle and another as separate VLANs for election

purposes (service type mismatch).



for example PE1 loopback 150.1.1.1 PE2 loopback 150.1.2.2



PE1 has vlan 2,3,4 PE2 has vlan 3,4



so DF election at present V mod N so PE1 will be DF in PE1 calculation.

in PE2 DF calculation V mod N. PE2 will be DF. So in short both PE will be DF for a EVI.



Regards,

Sudhin Jacob







On Wed, 25 Nov 2015 03:42:00 +0530 "Satya Mohanty (satyamoh)" 
wrote

> 











Hi Kishore/Sudhin,













From: Kishore Tiruveedhula 



Date: Tuesday, November 24, 2015 12:42 PM



To: smohanty mohanty , "Patrice Brissette (pbrisset)" 
, sudeep g ggg ,

"bess@ietf.org" 



Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02

























Please see below inline…[Kishore].



















1. When a new PE comes in the MH segment.





[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the receiving PEs also need to wait for 3 secs. But, ideally, a PE that is going from DF to non-DF or non-DF to non-DF should become the non-DF rightaway. Only the

PE that is going DF really needs to wait for 3 secs. This is not explicitly spelled out in the draft but we are thinking along these lines.











[Kishore] Yes. The new PE need to wait for 3 seconds, but if new PE receives the type 4 route from the redundant PE before 3 seconds, the new PE can just move to DF immediately (if it becomes DF) just after receiving the type 4 without waiting for the

3 seconds timer expiry because the otherredundant PE might have moved to Non-DF as there is no 3 seconds timer on the other PE which is moving from DF to Non-DF.

It is good idea to explicitly spell out this in this draft.









[Satya] Right. We will spell this out in the next version.

























[Satya]Now, delay of BGP updates is not dependent on the above behavior. That depends on the network topology and queueing/processing at intermediate nodes.

With HRW, a PE coming up will result in minimal disruption of the established DF for various vlans (bundles) as opposed to RFC 7438 mod-based.











[Kishore] If the BGP update processing takes more time on one PE and receives less time from RR on the other PE, then it may be possible of both PE may become DF or Non-DF, so the timer value should be chosen large enough in this case.










[Satya] The problem is there is no "cure-all" timer value that will guarantee this behavior.

There was a ack based draft sometime back, but it would have introduced considerable overhead that caused complications.















Thanks,

Kishore



















Thanks,



--Satya

















































_______________________________________________



BESS mailing list



BESS@ietf.org



https://www.ietf.org/mailman/listinfo/bess
















Get your own

FREE website, 
FREE domain & 
FREE mobile app with Company email. 

Know
 More >







 
 
_______________________________________________

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--=_a68bbb93d74524bcff0283cd642cb019
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Hi Jorge,<br />
<br />
Let me thank you for the mail. Since this mail thread is for one particular=
 draft. I think it is good to open a new thread for discussing another draf=
t. May I request you to give me some time to go through it and  I get back.=
I will open a new thread for discussing your draft.Appreciate your support.=
<br />
<br />
Regards,<br />
Sudhin Jacob<br />
<br />
On Wed, 25 Nov 2015 16:29:29 +0530 "Rabadan, Jorge (Jorge)" <jorge.rabadan@=
alcatel-lucent.com> wrote<br />
> <br />
<br />
<br />
 <br />
<br />
<br />
<br />
Hi Sudhin,<br />
<br />
<br />
<br />
You may want to have a look at this draft:<br />
https://tools.ietf.org/html/draft-rabadan-bess-evpn-ac-df-02<br />
<br />
<br />
<br />
Provides a solution for your use-case in EVPN, without any control plane ch=
anges compared to RFC7432.<br />
There are already implementations doing that.<br />
<br />
<br />
<br />
Thanks.<br />
Jorge<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
From: BESS <bess-bounces@ietf.org> on behalf of sudeep g ggg <sudhinjacob@r=
ediffmail.com><br />
<br />
Date: Wednesday, November 25, 2015 at 11:18 AM<br />
<br />
To: "satyamoh@cisco.com" <satyamoh@cisco.com><br />
<br />
Cc: "pbrisset@cisco.com" <pbrisset@cisco.com>, "bess@ietf.org" <bess@ietf.o=
rg>,<br />
 "kishoret@juniper.net" <kishoret@juniper.net><br />
<br />
Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Hi Satya,<br />
<br />
<br />
<br />
Let me thank you for your mail,it is much appreciated.You will take this in=
 to account in next revision, much appreciated so that all will be in same =
page. One more thought though just a random thought.I would like to bring y=
our kind attention.Since section<br />
 7.1 you clearly explains that you are not taking in to consideration about=
 vlan mis configuration. My thought<br />
<br />
<br />
requires no answers from your side.But I would like to bring one case in to=
 your frame of mind just sharing it.Once again big thank you for your reply=
.<br />
<br />
<br />
<br />
Section 7.1<br />
<br />
<br />
<br />
Observe that currently the VLANs are derived from local configuration<br />
<br />
and the FSM does not provide any protection against misconfiguration<br />
<br />
where same EVI,ESI combination has different set of VLANs on<br />
<br />
different participating PEs or one of the PEs elects to consider<br />
<br />
VLANs as VLAN bundle and another as separate VLANs for election<br />
<br />
purposes (service type mismatch).<br />
<br />
<br />
<br />
for example PE1 loopback 150.1.1.1 PE2 loopback 150.1.2.2<br />
<br />
<br />
<br />
PE1 has vlan 2,3,4 PE2 has vlan 3,4<br />
<br />
<br />
<br />
so DF election at present V mod N so PE1 will be DF in PE1 calculation.<br =
/>
<br />
in PE2 DF calculation V mod N. PE2 will be DF. So in short both PE will be =
DF for a EVI.<br />
<br />
<br />
<br />
Regards,<br />
<br />
Sudhin Jacob<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
On Wed, 25 Nov 2015 03:42:00 +0530 "Satya Mohanty (satyamoh)" <br />
wrote<br />
<br />
> <br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Hi Kishore/Sudhin,<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
From: Kishore Tiruveedhula <br />
<br />
<br />
<br />
Date: Tuesday, November 24, 2015 12:42 PM<br />
<br />
<br />
<br />
To: smohanty mohanty , "Patrice Brissette (pbrisset)" <br />
, sudeep g ggg ,<br />
<br />
"bess@ietf.org" <br />
<br />
<br />
<br />
Subject: Re: [bess] REG: draft-mohanty-bess-evpn-df-election-02<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Please see below inline=E2=80=A6[Kishore].<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
1. When a new PE comes in the MH segment.<br />
<br />
<br />
<br />
<br />
<br />
[Satya] Yes, New PE needs to wait for 3 sec. According to RFC 7438, the rec=
eiving PEs also need to wait for 3 secs. But, ideally, a PE that is going f=
rom DF to non-DF or non-DF to non-DF should become the non-DF rightaway. On=
ly the<br />
<br />
PE that is going DF really needs to wait for 3 secs. This is not explicitly=
 spelled out in the draft but we are thinking along these lines.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
[Kishore] Yes. The new PE need to wait for 3 seconds, but if new PE receive=
s the type 4 route from the redundant PE before 3 seconds, the new PE can j=
ust move to DF immediately (if it becomes DF) just after receiving the type=
 4 without waiting for the<br />
<br />
3 seconds timer expiry because the otherredundant PE might have moved to No=
n-DF as there is no 3 seconds timer on the other PE which is moving from DF=
 to Non-DF.<br />
<br />
It is good idea to explicitly spell out this in this draft.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
[Satya] Right. We will spell this out in the next version.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
[Satya]Now, delay of BGP updates is not dependent on the above behavior. Th=
at depends on the network topology and queueing/processing at intermediate =
nodes.<br />
<br />
With HRW, a PE coming up will result in minimal disruption of the establish=
ed DF for various vlans (bundles) as opposed to RFC 7438 mod-based.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
[Kishore] If the BGP update processing takes more time on one PE and receiv=
es less time from RR on the other PE, then it may be possible of both PE ma=
y become DF or Non-DF, so the timer value should be chosen large enough in =
this case.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
[Satya] The problem is there is no "cure-all" timer value that will guarant=
ee this behavior.<br />
<br />
There was a ack based draft sometime back, but it would have introduced con=
siderable overhead that caused complications.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Thanks,<br />
<br />
Kishore<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Thanks,<br />
<br />
<br />
<br />
--Satya<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
_______________________________________________<br />
<br />
<br />
<br />
BESS mailing list<br />
<br />
<br />
<br />
BESS@ietf.org<br />
<br />
<br />
<br />
https://www.ietf.org/mailman/listinfo/bess<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Get your own<br />
<br />
FREE website, <br />
FREE domain & <br />
FREE mobile app with Company email. <br />
<br />
Know<br />
 More ><br />
<br />
<br />
<br />
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<br />
 <br />
 <br />
_______________________________________________<br />
<br />
BESS mailing list<br />
<br />
BESS@ietf.org<br />
<br />
https://www.ietf.org/mailman/listinfo/bess<br />
<br />
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From: Martin Vigoureux <martin.vigoureux@alcatel-lucent.com>
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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Joel, Benson,

hello.

I agree that there has not been a lengthy discussion during the session 
but some people reacted to the proposal and expressed their support.

Joel, on the specific point that a discussion in a meeting is 
informative, I fully agree, and the point of our e-mail is to continue 
the discussion on the list. We explicitly say that this is a proposal 
and that we are open to comments.

Thanks
-m

Le 25/11/2015 01:19, Benson Schliesser a écrit :
> I think this may be a useful "procedural bar" and if so then I'd like to
> see it implemented in other WGs, too... And, to some extent, it may be
> within the prerogative of the WG chairs. But I am also surprised by the
> lack of discussion. And I don't see any substantial conversation
> documented in the proceedings of the last meeting. I'd like to
> understand why this threshold makes sense to the WG, assuming it does...
> -Benson
>
>
> On Tue, Nov 24, 2015 at 7:11 PM, Joel M. Halpern <jmh@joelhalpern.com
> <mailto:jmh@joelhalpern.com>> wrote:
>
>     Without wanting to be pedantic, I would have expected to see
>     discusison of this on the list, and determination that the list
>     agreed with it. Discussion at the meeting is informative, but is not
>     the basis for a WG decision.
>
>     I am also slightly concerned that the working group is creating a
>     procedural bar (one that does seem reasonable to me) without buyin
>     from the larger community.
>
>     Yours,
>     Joel
>
>     On 11/24/15 6:16 PM, Martin Vigoureux wrote:
>
>         Hi Adrian,
>
>         indeed, minutes should have been available sooner. situation has
>         been
>         corrected.
>
>         The basic motivation for this is simply to avoid (over)loading
>         the iesg
>         with documents that have no (and could possibly never have an)
>         implementation. Or, at least, if every spec gets implemented, it
>         is to
>         prioritize them.
>
>         The discussion happened at the beginning of the meeting. It was
>         on one
>         of the slides I have presented as part of the WG status.
>
>         -m
>
>         Le 24/11/2015 17:07, Adrian Farrel a écrit :
>
>             Hi Thomas,
>
>             It's really hard to enter this discussion with any context.
>
>             Could you post the minutes from the meeting and maybe
>             summarise the
>             points in
>             favour of this approach?
>             (Of course, I can listen to the audio when I have some spare
>             time.)
>
>             Thanks,
>             Adrian
>
>             _______________________________________________
>             BESS mailing list
>             BESS@ietf.org <mailto:BESS@ietf.org>
>             https://www.ietf.org/mailman/listinfo/bess
>
>
>         _______________________________________________
>         BESS mailing list
>         BESS@ietf.org <mailto:BESS@ietf.org>
>         https://www.ietf.org/mailman/listinfo/bess
>
>
>     _______________________________________________
>     BESS mailing list
>     BESS@ietf.org <mailto:BESS@ietf.org>
>     https://www.ietf.org/mailman/listinfo/bess
>
>


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Respected Authors,

I had gone through the draft at high level,I am happy to see a real provider provisioning issues addressed in your draft. Much appreciated.

 Some key highlights in your draft.

1. No changes.
2. Using existing features to address a problem.
3. Addresses provisioning issues.

How ever I have following queries.

May I know how to deal with vlan provisioning issues like one PE will have vlan 2,3,4 and other PE will have 3,4 this will end up in both PE's as DF correct me if I am wrong, you use type 1 Ad per ES and EVI for DF election, how about vlan issues.

May I know how to handle transient loop during 3 seconds period during DF election.May I know the state of PE during the DF election, clarity required[humble opinion].


This seems to be a good customer focused solution. I appreciate it.[please note: this is my humble opinion as an individual not representing any one]

Regards,
Sudhin Jacob








--=_972ea1306f14e5b8888cc749b81601f4
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Respected Authors,<br />
<br />
I had gone through the draft at high level,I am happy to see a real provide=
r provisioning issues addressed in your draft. Much appreciated.<br />
<br />
 Some key highlights in your draft.<br />
<br />
1. No changes.<br />
2. Using existing features to address a problem.<br />
3. Addresses provisioning issues.<br />
<br />
How ever I have following queries.<br />
<br />
May I know how to deal with vlan provisioning issues like one PE will have =
vlan 2,3,4 and other PE will have 3,4 this will end up in both PE's as DF c=
orrect me if I am wrong, you use type 1 Ad per ES and EVI for DF election, =
how about vlan issues.<br />
<br />
May I know how to handle transient loop during 3 seconds period during DF e=
lection.May I know the state of PE during the DF election, clarity required=
[humble opinion].<br />
<br />
<br />
This seems to be a good customer focused solution. I appreciate it.[please =
note: this is my humble opinion as an individual not representing any one]<=
br />
<br />
Regards,<br />
Sudhin Jacob<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br><Table border=3D0 Width=3D100% Height=3D57 cellspacing=3D0 cellpadding=
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From nobody Wed Nov 25 14:19:31 2015
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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Adrian,

Thanks.
Please see my reactions in-line.

-m

Le 25/11/2015 01:13, Adrian Farrel a écrit :
> Yeah, thanks Martin.
>
> The slide has...
>
> ==Raising the bar?==
> . Some documents are being pushed to IESG but
> without any implementation (plan) to support
> them
> . We are thinking of "requiring" that at least one
> implementation exists before handing the
> document to IESG
> . Thoughts?
>
> The first bullet allows for a plan to implement, the second requires
> implementation. The use of quotes in the second bullet suggests that you may be
> considering that the requirement may be flexible. Obviously we have an opening
> for discussion, but I wonder how you would decide when to be flexible.

Good question :-) Indeed, the intent is to not be blindly strict. But 
defining the margins of flexibility is the tricky part then.
I am pretty sure that this will be on a case by case with the default 
being the 1 implem requirement.
I'll take an example: draft-ietf-bess-pta-flags
It defines 2 registries as well as a new BGP Extended Community together 
with the associated processing procedures. The latter is definitely 
subject to being implemented and as such subject to the requirement we 
are discussing.
However, what this document really does is to define a mechanism in 
support of specific needs.
So I think that this could be a case where we could skip the 1 implem 
requirement (but apply it to the specs that use pta-flags).

> The minutes are a good indication of the level of support you received in the
> room, but not a deep discussion :-) There seems to be some confusion in the
> discussion between expediting (or unblocking) I-Ds that have an implementation,
> and delaying (or blocking) I-Ds that don't have implementations. While, in a
> world of limited resources, the two things are related, ideally we are not
> significantly gating the progress of one I-D because we are busy processing
> another.
I'd say there are different points of view rather than confusion. In a 
situation where implementations are not considered mandatory, having one 
might indeed be a criteria for moving faster through the process but I 
think this is one amongst several possible other criterion.

> Now, I really, really support your motivation, viz. to reduce the pointless,
> unreviewed, unnecessary, or substandard drafts being sent for publication. The
> question is how to achieve that.
The primary intent here is to send to IESG only documents that have an 
implementation. It makes their case stronger, is a contribution to 
reducing the load on IESG's shoulders, and also it anyway makes little 
sense to push through the standardization process an implementable 
specification but for which no implementation exists.
The moment to submit to iesg is definitely a good time (and the last 
possible from a chair's perspective) to think about that.

Now, your two sentences above open the door to a broader set of 
potential actions that could be taken to reach the objective, actions 
which are relevant during the I-D life cycle within the WG. But I guess 
this is a broader discussion.

>
> Adrian (still thinking about this)
>
>> -----Original Message-----
>> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Martin Vigoureux
>> Sent: 24 November 2015 23:17
>> To: bess@ietf.org
>> Subject: Re: [bess] Introducing a one-implementation requirement before WG
>> last calls
>>
>> Hi Adrian,
>>
>> indeed, minutes should have been available sooner. situation has been
>> corrected.
>>
>> The basic motivation for this is simply to avoid (over)loading the iesg
>> with documents that have no (and could possibly never have an)
>> implementation. Or, at least, if every spec gets implemented, it is to
>> prioritize them.
>>
>> The discussion happened at the beginning of the meeting. It was on one
>> of the slides I have presented as part of the WG status.
>>
>> -m
>>
>> Le 24/11/2015 17:07, Adrian Farrel a écrit :
>>> Hi Thomas,
>>>
>>> It's really hard to enter this discussion with any context.
>>>
>>> Could you post the minutes from the meeting and maybe summarise the points
>> in
>>> favour of this approach?
>>> (Of course, I can listen to the audio when I have some spare time.)
>>>
>>> Thanks,
>>> Adrian
>>>
>>> _______________________________________________
>>> BESS mailing list
>>> BESS@ietf.org
>>> https://www.ietf.org/mailman/listinfo/bess
>>>
>>
>> _______________________________________________
>> BESS mailing list
>> BESS@ietf.org
>> https://www.ietf.org/mailman/listinfo/bess
>
>


From nobody Wed Nov 25 14:57:50 2015
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From: "Andrew G. Malis" <agmalis@gmail.com>
Date: Wed, 25 Nov 2015 17:57:25 -0500
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Cc: Adrian Farrel <adrian@olddog.co.uk>, "bess@ietf.org" <bess@ietf.org>
Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Based on my experience on both the vendor and operator side, I see some
practical problems with this approach:

- There are some (many?) operators that won=E2=80=99t put drafts into an RF=
P, only
RFCs.

- There are some (many?) vendors that won=E2=80=99t implement a draft or RF=
C, no
matter how good the quality, unless they have a customer that wants the
feature. That could be an existing customer that needs the feature
operationally (which could lead to early implementation), or it could be a
prospective customer with an RFP.

- Vendors, of course, prioritize their implementation plans, and they
usually put RFCs ahead of drafts, since drafts could change before
publication, requiring a change in the implementation.

For all these reasons, unless there=E2=80=99s an existing customer that nee=
ds a
draft=E2=80=99s features to fix an operational problem, it=E2=80=99s less c=
ommon for
vendors to implement drafts than RFCs.

A better approach might be to do an implementation poll just prior to WG LC
(including implementation plans). The WG can then take the results of the
poll into consideration during WG LC to see if there=E2=80=99s a consensus =
to send
it to the IESG. There could be a draft that everyone agrees is really
important to get published, but for whatever reason hasn=E2=80=99t yet been
implemented.

Cheers,
Andy


On Wed, Nov 25, 2015 at 5:19 PM, Martin Vigoureux <
martin.vigoureux@alcatel-lucent.com> wrote:

> Adrian,
>
> Thanks.
> Please see my reactions in-line.
>
> -m
>
> Le 25/11/2015 01:13, Adrian Farrel a =C3=A9crit :
>
>> Yeah, thanks Martin.
>>
>> The slide has...
>>
>> =3D=3DRaising the bar?=3D=3D
>> . Some documents are being pushed to IESG but
>> without any implementation (plan) to support
>> them
>> . We are thinking of "requiring" that at least one
>> implementation exists before handing the
>> document to IESG
>> . Thoughts?
>>
>> The first bullet allows for a plan to implement, the second requires
>> implementation. The use of quotes in the second bullet suggests that you
>> may be
>> considering that the requirement may be flexible. Obviously we have an
>> opening
>> for discussion, but I wonder how you would decide when to be flexible.
>>
>
> Good question :-) Indeed, the intent is to not be blindly strict. But
> defining the margins of flexibility is the tricky part then.
> I am pretty sure that this will be on a case by case with the default
> being the 1 implem requirement.
> I'll take an example: draft-ietf-bess-pta-flags
> It defines 2 registries as well as a new BGP Extended Community together
> with the associated processing procedures. The latter is definitely subje=
ct
> to being implemented and as such subject to the requirement we are
> discussing.
> However, what this document really does is to define a mechanism in
> support of specific needs.
> So I think that this could be a case where we could skip the 1 implem
> requirement (but apply it to the specs that use pta-flags).
>
> The minutes are a good indication of the level of support you received in
>> the
>> room, but not a deep discussion :-) There seems to be some confusion in
>> the
>> discussion between expediting (or unblocking) I-Ds that have an
>> implementation,
>> and delaying (or blocking) I-Ds that don't have implementations. While,
>> in a
>> world of limited resources, the two things are related, ideally we are n=
ot
>> significantly gating the progress of one I-D because we are busy
>> processing
>> another.
>>
> I'd say there are different points of view rather than confusion. In a
> situation where implementations are not considered mandatory, having one
> might indeed be a criteria for moving faster through the process but I
> think this is one amongst several possible other criterion.
>
> Now, I really, really support your motivation, viz. to reduce the
>> pointless,
>> unreviewed, unnecessary, or substandard drafts being sent for
>> publication. The
>> question is how to achieve that.
>>
> The primary intent here is to send to IESG only documents that have an
> implementation. It makes their case stronger, is a contribution to reduci=
ng
> the load on IESG's shoulders, and also it anyway makes little sense to pu=
sh
> through the standardization process an implementable specification but fo=
r
> which no implementation exists.
> The moment to submit to iesg is definitely a good time (and the last
> possible from a chair's perspective) to think about that.
>
> Now, your two sentences above open the door to a broader set of potential
> actions that could be taken to reach the objective, actions which are
> relevant during the I-D life cycle within the WG. But I guess this is a
> broader discussion.
>
>
>
>> Adrian (still thinking about this)
>>
>> -----Original Message-----
>>> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Martin Vigoureux
>>> Sent: 24 November 2015 23:17
>>> To: bess@ietf.org
>>> Subject: Re: [bess] Introducing a one-implementation requirement before
>>> WG
>>> last calls
>>>
>>> Hi Adrian,
>>>
>>> indeed, minutes should have been available sooner. situation has been
>>> corrected.
>>>
>>> The basic motivation for this is simply to avoid (over)loading the iesg
>>> with documents that have no (and could possibly never have an)
>>> implementation. Or, at least, if every spec gets implemented, it is to
>>> prioritize them.
>>>
>>> The discussion happened at the beginning of the meeting. It was on one
>>> of the slides I have presented as part of the WG status.
>>>
>>> -m
>>>
>>> Le 24/11/2015 17:07, Adrian Farrel a =C3=A9crit :
>>>
>>>> Hi Thomas,
>>>>
>>>> It's really hard to enter this discussion with any context.
>>>>
>>>> Could you post the minutes from the meeting and maybe summarise the
>>>> points
>>>>
>>> in
>>>
>>>> favour of this approach?
>>>> (Of course, I can listen to the audio when I have some spare time.)
>>>>
>>>> Thanks,
>>>> Adrian
>>>>
>>>> _______________________________________________
>>>> BESS mailing list
>>>> BESS@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/bess
>>>>
>>>>
>>> _______________________________________________
>>> BESS mailing list
>>> BESS@ietf.org
>>> https://www.ietf.org/mailman/listinfo/bess
>>>
>>
>>
>>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>

--047d7bd91af2e7ed1a05256562ba
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<div dir=3D"ltr">Based on my experience on both the vendor and operator sid=
e, I see some practical problems with this approach:<div><br></div><div>- T=
here are some (many?) operators that won=E2=80=99t put drafts into an RFP, =
only RFCs.</div><div><br></div><div>- There are some (many?) vendors that w=
on=E2=80=99t implement a draft or RFC, no matter how good the quality, unle=
ss they have a customer that wants the feature. That could be an existing c=
ustomer that needs the feature operationally (which could lead to early imp=
lementation), or it could be a prospective customer with an RFP.</div><div>=
<br></div><div>- Vendors, of course, prioritize their implementation plans,=
 and they usually put RFCs ahead of drafts, since drafts could change befor=
e publication, requiring a change in the implementation.</div><div><br></di=
v><div>For all these reasons, unless there=E2=80=99s an existing customer t=
hat needs a draft=E2=80=99s features to fix an operational problem, it=E2=
=80=99s less common for vendors to implement drafts than RFCs.</div><div><b=
r></div><div>A better approach might be to do an implementation poll just p=
rior to WG LC (including implementation plans). The WG can then take the re=
sults of the poll into consideration during WG LC to see if there=E2=80=99s=
 a consensus to send it to the IESG. There could be a draft that everyone a=
grees is really important to get published, but for whatever reason hasn=E2=
=80=99t yet been implemented.</div><div><br></div><div>Cheers,</div><div>An=
dy</div><div><br></div></div><div class=3D"gmail_extra"><br><div class=3D"g=
mail_quote">On Wed, Nov 25, 2015 at 5:19 PM, Martin Vigoureux <span dir=3D"=
ltr">&lt;<a href=3D"mailto:martin.vigoureux@alcatel-lucent.com" target=3D"_=
blank">martin.vigoureux@alcatel-lucent.com</a>&gt;</span> wrote:<br><blockq=
uote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc =
solid;padding-left:1ex">Adrian,<br>
<br>
Thanks.<br>
Please see my reactions in-line.<br>
<br>
-m<span class=3D""><br>
<br>
Le 25/11/2015 01:13, Adrian Farrel a =C3=A9crit :<br>
</span><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-=
left:1px #ccc solid;padding-left:1ex"><span class=3D"">
Yeah, thanks Martin.<br>
<br>
The slide has...<br>
<br>
=3D=3DRaising the bar?=3D=3D<br></span>
. Some documents are being pushed to IESG but<span class=3D""><br>
without any implementation (plan) to support<br>
them<br></span>
. We are thinking of &quot;requiring&quot; that at least one<span class=3D"=
"><br>
implementation exists before handing the<br>
document to IESG<br></span>
. Thoughts?<span class=3D""><br>
<br>
The first bullet allows for a plan to implement, the second requires<br>
implementation. The use of quotes in the second bullet suggests that you ma=
y be<br>
considering that the requirement may be flexible. Obviously we have an open=
ing<br>
for discussion, but I wonder how you would decide when to be flexible.<br>
</span></blockquote>
<br>
Good question :-) Indeed, the intent is to not be blindly strict. But defin=
ing the margins of flexibility is the tricky part then.<br>
I am pretty sure that this will be on a case by case with the default being=
 the 1 implem requirement.<br>
I&#39;ll take an example: draft-ietf-bess-pta-flags<br>
It defines 2 registries as well as a new BGP Extended Community together wi=
th the associated processing procedures. The latter is definitely subject t=
o being implemented and as such subject to the requirement we are discussin=
g.<br>
However, what this document really does is to define a mechanism in support=
 of specific needs.<br>
So I think that this could be a case where we could skip the 1 implem requi=
rement (but apply it to the specs that use pta-flags).<span class=3D""><br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
The minutes are a good indication of the level of support you received in t=
he<br>
room, but not a deep discussion :-) There seems to be some confusion in the=
<br>
discussion between expediting (or unblocking) I-Ds that have an implementat=
ion,<br>
and delaying (or blocking) I-Ds that don&#39;t have implementations. While,=
 in a<br>
world of limited resources, the two things are related, ideally we are not<=
br>
significantly gating the progress of one I-D because we are busy processing=
<br>
another.<br>
</blockquote></span>
I&#39;d say there are different points of view rather than confusion. In a =
situation where implementations are not considered mandatory, having one mi=
ght indeed be a criteria for moving faster through the process but I think =
this is one amongst several possible other criterion.<span class=3D""><br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Now, I really, really support your motivation, viz. to reduce the pointless=
,<br>
unreviewed, unnecessary, or substandard drafts being sent for publication. =
The<br>
question is how to achieve that.<br>
</blockquote></span>
The primary intent here is to send to IESG only documents that have an impl=
ementation. It makes their case stronger, is a contribution to reducing the=
 load on IESG&#39;s shoulders, and also it anyway makes little sense to pus=
h through the standardization process an implementable specification but fo=
r which no implementation exists.<br>
The moment to submit to iesg is definitely a good time (and the last possib=
le from a chair&#39;s perspective) to think about that.<br>
<br>
Now, your two sentences above open the door to a broader set of potential a=
ctions that could be taken to reach the objective, actions which are releva=
nt during the I-D life cycle within the WG. But I guess this is a broader d=
iscussion.<div class=3D"HOEnZb"><div class=3D"h5"><br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<br>
Adrian (still thinking about this)<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
-----Original Message-----<br>
From: BESS [mailto:<a href=3D"mailto:bess-bounces@ietf.org" target=3D"_blan=
k">bess-bounces@ietf.org</a>] On Behalf Of Martin Vigoureux<br>
Sent: 24 November 2015 23:17<br>
To: <a href=3D"mailto:bess@ietf.org" target=3D"_blank">bess@ietf.org</a><br=
>
Subject: Re: [bess] Introducing a one-implementation requirement before WG<=
br>
last calls<br>
<br>
Hi Adrian,<br>
<br>
indeed, minutes should have been available sooner. situation has been<br>
corrected.<br>
<br>
The basic motivation for this is simply to avoid (over)loading the iesg<br>
with documents that have no (and could possibly never have an)<br>
implementation. Or, at least, if every spec gets implemented, it is to<br>
prioritize them.<br>
<br>
The discussion happened at the beginning of the meeting. It was on one<br>
of the slides I have presented as part of the WG status.<br>
<br>
-m<br>
<br>
Le 24/11/2015 17:07, Adrian Farrel a =C3=A9crit :<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Hi Thomas,<br>
<br>
It&#39;s really hard to enter this discussion with any context.<br>
<br>
Could you post the minutes from the meeting and maybe summarise the points<=
br>
</blockquote>
in<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
favour of this approach?<br>
(Of course, I can listen to the audio when I have some spare time.)<br>
<br>
Thanks,<br>
Adrian<br>
<br>
_______________________________________________<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org" target=3D"_blank">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
<br>
</blockquote>
<br>
_______________________________________________<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org" target=3D"_blank">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
</blockquote>
<br>
<br>
</blockquote>
<br>
_______________________________________________<br>
BESS mailing list<br>
<a href=3D"mailto:BESS@ietf.org" target=3D"_blank">BESS@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bess" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/bess</a><br>
</div></div></blockquote></div><br></div>

--047d7bd91af2e7ed1a05256562ba--


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Sounds like a good idea to me. One tweak: having an official "release x.y @s=
hipping date d" is unlikely for a draft. The value of one implementation (vs=
 more) is that it shows that a spec is implementable and reasonably complete=
. So, this should be the focus, with details on how much of the spec was imp=
lemented. Shipping plans should be totally optional.=20

Note that even an experimental implementation takes effort, is likely to bec=
ome official, and shows a degree of seriousness of the part of the implement=
or.  Asking for greater commitment at WGLC is (imho) asking too much.=20

Kireeti

> On Nov 24, 2015, at 01:03, Thomas Morin <thomas.morin@orange.com> wrote:
>=20
> Hello everyone,
>=20
> Following the positive feedback received during BESS meeting in Yokohama a=
bout introducing a one-implementation requirement in BESS, we propose to do t=
he following for future WG last calls:
>=20
> As a prerequisite before doing a working group last call on a document, th=
e chairs will ask the working group for known implementations of the specifi=
cations; a relatively detailed level of information will be required (e.g. "=
release x.y of solution z shipping date d", "all features implemented", "par=
tial implementation only", etc.) and everyone will be invited to reply (not o=
nly co-authors of the specifications); the chairs will then do the working g=
roup last call if satisfying information was provided on at least one implem=
entation.
>=20
> We are open for comments on this proposal until December 7th.
>=20
> Martin & Thomas
>=20
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess


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To: "Andrew G. Malis" <agmalis@gmail.com>, Martin Vigoureux <martin.vigoureux@alcatel-lucent.com>
References: <04a401d126d2$3791e170$a6b5a450$@olddog.co.uk> <5654EFEB.4000101@alcatel-lucent.com> <057501d12716$2c7c4340$8574c9c0$@olddog.co.uk> <565633EC.2080700@alcatel-lucent.com> <CAA=duU2Ux-r7OpWiFMm6LqpO+EYyQhM41aeB9vy-jYRztcz6WQ@mail.gmail.com>
From: Loa Andersson <loa@pi.nu>
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Cc: Adrian Farrel <adrian@olddog.co.uk>, "bess@ietf.org" <bess@ietf.org>
Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Folks,

I'm very much om the same page as Andy, having knowledge of
implementations is a good thing. A "requirement" that we have an
implementation before requesting that the document is published as
an RFC is in most cases also good.

The tricky part is when to be flexible. I've asked for implementations
for every intended PS we requested publication for. I have more than
once been in a situation there operators tell me that the have the
draft deployed, but where the vendor does not respond to questions
about implementations.

I've also seen where two vendors asked for early allocation because
they are implementing and doing interop tests. Again one or both
vendors does not respond to the implementation poll.

One can speculate about the reasons for this, but it seems that often
the decision whether or not to disclose an implementation is outside
the mandate for people participating in immediate IETF process.

In short, with a sufficient level of flexibility I support this. It
would be good if we can have some type of report when some experience
of the required implementation is at hand.

/Loa


On 2015-11-26 06:57, Andrew G. Malis wrote:
> Based on my experience on both the vendor and operator side, I see some
> practical problems with this approach:
>
> - There are some (many?) operators that won’t put drafts into an RFP,
> only RFCs.
>
> - There are some (many?) vendors that won’t implement a draft or RFC, no
> matter how good the quality, unless they have a customer that wants the
> feature. That could be an existing customer that needs the feature
> operationally (which could lead to early implementation), or it could be
> a prospective customer with an RFP.
>
> - Vendors, of course, prioritize their implementation plans, and they
> usually put RFCs ahead of drafts, since drafts could change before
> publication, requiring a change in the implementation.
>
> For all these reasons, unless there’s an existing customer that needs a
> draft’s features to fix an operational problem, it’s less common for
> vendors to implement drafts than RFCs.
>
> A better approach might be to do an implementation poll just prior to WG
> LC (including implementation plans). The WG can then take the results of
> the poll into consideration during WG LC to see if there’s a consensus
> to send it to the IESG. There could be a draft that everyone agrees is
> really important to get published, but for whatever reason hasn’t yet
> been implemented.
>
> Cheers,
> Andy
>
>
> On Wed, Nov 25, 2015 at 5:19 PM, Martin Vigoureux
> <martin.vigoureux@alcatel-lucent.com
> <mailto:martin.vigoureux@alcatel-lucent.com>> wrote:
>
>     Adrian,
>
>     Thanks.
>     Please see my reactions in-line.
>
>     -m
>
>     Le 25/11/2015 01:13, Adrian Farrel a écrit :
>
>         Yeah, thanks Martin.
>
>         The slide has...
>
>         ==Raising the bar?==
>         . Some documents are being pushed to IESG but
>         without any implementation (plan) to support
>         them
>         . We are thinking of "requiring" that at least one
>         implementation exists before handing the
>         document to IESG
>         . Thoughts?
>
>         The first bullet allows for a plan to implement, the second requires
>         implementation. The use of quotes in the second bullet suggests
>         that you may be
>         considering that the requirement may be flexible. Obviously we
>         have an opening
>         for discussion, but I wonder how you would decide when to be
>         flexible.
>
>
>     Good question :-) Indeed, the intent is to not be blindly strict.
>     But defining the margins of flexibility is the tricky part then.
>     I am pretty sure that this will be on a case by case with the
>     default being the 1 implem requirement.
>     I'll take an example: draft-ietf-bess-pta-flags
>     It defines 2 registries as well as a new BGP Extended Community
>     together with the associated processing procedures. The latter is
>     definitely subject to being implemented and as such subject to the
>     requirement we are discussing.
>     However, what this document really does is to define a mechanism in
>     support of specific needs.
>     So I think that this could be a case where we could skip the 1
>     implem requirement (but apply it to the specs that use pta-flags).
>
>         The minutes are a good indication of the level of support you
>         received in the
>         room, but not a deep discussion :-) There seems to be some
>         confusion in the
>         discussion between expediting (or unblocking) I-Ds that have an
>         implementation,
>         and delaying (or blocking) I-Ds that don't have implementations.
>         While, in a
>         world of limited resources, the two things are related, ideally
>         we are not
>         significantly gating the progress of one I-D because we are busy
>         processing
>         another.
>
>     I'd say there are different points of view rather than confusion. In
>     a situation where implementations are not considered mandatory,
>     having one might indeed be a criteria for moving faster through the
>     process but I think this is one amongst several possible other
>     criterion.
>
>         Now, I really, really support your motivation, viz. to reduce
>         the pointless,
>         unreviewed, unnecessary, or substandard drafts being sent for
>         publication. The
>         question is how to achieve that.
>
>     The primary intent here is to send to IESG only documents that have
>     an implementation. It makes their case stronger, is a contribution
>     to reducing the load on IESG's shoulders, and also it anyway makes
>     little sense to push through the standardization process an
>     implementable specification but for which no implementation exists.
>     The moment to submit to iesg is definitely a good time (and the last
>     possible from a chair's perspective) to think about that.
>
>     Now, your two sentences above open the door to a broader set of
>     potential actions that could be taken to reach the objective,
>     actions which are relevant during the I-D life cycle within the WG.
>     But I guess this is a broader discussion.
>
>
>
>         Adrian (still thinking about this)
>
>             -----Original Message-----
>             From: BESS [mailto:bess-bounces@ietf.org
>             <mailto:bess-bounces@ietf.org>] On Behalf Of Martin Vigoureux
>             Sent: 24 November 2015 23:17
>             To: bess@ietf.org <mailto:bess@ietf.org>
>             Subject: Re: [bess] Introducing a one-implementation
>             requirement before WG
>             last calls
>
>             Hi Adrian,
>
>             indeed, minutes should have been available sooner. situation
>             has been
>             corrected.
>
>             The basic motivation for this is simply to avoid
>             (over)loading the iesg
>             with documents that have no (and could possibly never have an)
>             implementation. Or, at least, if every spec gets
>             implemented, it is to
>             prioritize them.
>
>             The discussion happened at the beginning of the meeting. It
>             was on one
>             of the slides I have presented as part of the WG status.
>
>             -m
>
>             Le 24/11/2015 17:07, Adrian Farrel a écrit :
>
>                 Hi Thomas,
>
>                 It's really hard to enter this discussion with any context.
>
>                 Could you post the minutes from the meeting and maybe
>                 summarise the points
>
>             in
>
>                 favour of this approach?
>                 (Of course, I can listen to the audio when I have some
>                 spare time.)
>
>                 Thanks,
>                 Adrian
>
>                 _______________________________________________
>                 BESS mailing list
>                 BESS@ietf.org <mailto:BESS@ietf.org>
>                 https://www.ietf.org/mailman/listinfo/bess
>
>
>             _______________________________________________
>             BESS mailing list
>             BESS@ietf.org <mailto:BESS@ietf.org>
>             https://www.ietf.org/mailman/listinfo/bess
>
>
>
>
>     _______________________________________________
>     BESS mailing list
>     BESS@ietf.org <mailto:BESS@ietf.org>
>     https://www.ietf.org/mailman/listinfo/bess
>
>
>
>
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess
>


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Cc: agmalis@gmail.com, Loa Andersson <loa@pi.nu>
Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Andy, Loa,

thanks for sharing your views.
If there are valid reasons for pushing to iesg a non-implemented 
specification, we'd be ready to consider them.
It would simply not be the default way of doing, nor the norm. If it 
was, if every draft was "really important", then none would really be, 
in fact.

Also, Loa, I believe that the situations you describe would be
solved thanks to the introduction of this requirement.

-m

Le 26/11/2015 06:35, Loa Andersson a écrit :
> Folks,
>
> I'm very much om the same page as Andy, having knowledge of
> implementations is a good thing. A "requirement" that we have an
> implementation before requesting that the document is published as
> an RFC is in most cases also good.
>
> The tricky part is when to be flexible. I've asked for implementations
> for every intended PS we requested publication for. I have more than
> once been in a situation there operators tell me that the have the
> draft deployed, but where the vendor does not respond to questions
> about implementations.
>
> I've also seen where two vendors asked for early allocation because
> they are implementing and doing interop tests. Again one or both
> vendors does not respond to the implementation poll.
>
> One can speculate about the reasons for this, but it seems that often
> the decision whether or not to disclose an implementation is outside
> the mandate for people participating in immediate IETF process.
>
> In short, with a sufficient level of flexibility I support this. It
> would be good if we can have some type of report when some experience
> of the required implementation is at hand.
>
> /Loa
>
>
> On 2015-11-26 06:57, Andrew G. Malis wrote:
>> Based on my experience on both the vendor and operator side, I see some
>> practical problems with this approach:
>>
>> - There are some (many?) operators that won’t put drafts into an RFP,
>> only RFCs.
>>
>> - There are some (many?) vendors that won’t implement a draft or RFC, no
>> matter how good the quality, unless they have a customer that wants the
>> feature. That could be an existing customer that needs the feature
>> operationally (which could lead to early implementation), or it could be
>> a prospective customer with an RFP.
>>
>> - Vendors, of course, prioritize their implementation plans, and they
>> usually put RFCs ahead of drafts, since drafts could change before
>> publication, requiring a change in the implementation.
>>
>> For all these reasons, unless there’s an existing customer that needs a
>> draft’s features to fix an operational problem, it’s less common for
>> vendors to implement drafts than RFCs.
>>
>> A better approach might be to do an implementation poll just prior to WG
>> LC (including implementation plans). The WG can then take the results of
>> the poll into consideration during WG LC to see if there’s a consensus
>> to send it to the IESG. There could be a draft that everyone agrees is
>> really important to get published, but for whatever reason hasn’t yet
>> been implemented.
>>
>> Cheers,
>> Andy
>>
>>
>> On Wed, Nov 25, 2015 at 5:19 PM, Martin Vigoureux
>> <martin.vigoureux@alcatel-lucent.com
>> <mailto:martin.vigoureux@alcatel-lucent.com>> wrote:
>>
>>     Adrian,
>>
>>     Thanks.
>>     Please see my reactions in-line.
>>
>>     -m
>>
>>     Le 25/11/2015 01:13, Adrian Farrel a écrit :
>>
>>         Yeah, thanks Martin.
>>
>>         The slide has...
>>
>>         ==Raising the bar?==
>>         . Some documents are being pushed to IESG but
>>         without any implementation (plan) to support
>>         them
>>         . We are thinking of "requiring" that at least one
>>         implementation exists before handing the
>>         document to IESG
>>         . Thoughts?
>>
>>         The first bullet allows for a plan to implement, the second
>> requires
>>         implementation. The use of quotes in the second bullet suggests
>>         that you may be
>>         considering that the requirement may be flexible. Obviously we
>>         have an opening
>>         for discussion, but I wonder how you would decide when to be
>>         flexible.
>>
>>
>>     Good question :-) Indeed, the intent is to not be blindly strict.
>>     But defining the margins of flexibility is the tricky part then.
>>     I am pretty sure that this will be on a case by case with the
>>     default being the 1 implem requirement.
>>     I'll take an example: draft-ietf-bess-pta-flags
>>     It defines 2 registries as well as a new BGP Extended Community
>>     together with the associated processing procedures. The latter is
>>     definitely subject to being implemented and as such subject to the
>>     requirement we are discussing.
>>     However, what this document really does is to define a mechanism in
>>     support of specific needs.
>>     So I think that this could be a case where we could skip the 1
>>     implem requirement (but apply it to the specs that use pta-flags).
>>
>>         The minutes are a good indication of the level of support you
>>         received in the
>>         room, but not a deep discussion :-) There seems to be some
>>         confusion in the
>>         discussion between expediting (or unblocking) I-Ds that have an
>>         implementation,
>>         and delaying (or blocking) I-Ds that don't have implementations.
>>         While, in a
>>         world of limited resources, the two things are related, ideally
>>         we are not
>>         significantly gating the progress of one I-D because we are busy
>>         processing
>>         another.
>>
>>     I'd say there are different points of view rather than confusion. In
>>     a situation where implementations are not considered mandatory,
>>     having one might indeed be a criteria for moving faster through the
>>     process but I think this is one amongst several possible other
>>     criterion.
>>
>>         Now, I really, really support your motivation, viz. to reduce
>>         the pointless,
>>         unreviewed, unnecessary, or substandard drafts being sent for
>>         publication. The
>>         question is how to achieve that.
>>
>>     The primary intent here is to send to IESG only documents that have
>>     an implementation. It makes their case stronger, is a contribution
>>     to reducing the load on IESG's shoulders, and also it anyway makes
>>     little sense to push through the standardization process an
>>     implementable specification but for which no implementation exists.
>>     The moment to submit to iesg is definitely a good time (and the last
>>     possible from a chair's perspective) to think about that.
>>
>>     Now, your two sentences above open the door to a broader set of
>>     potential actions that could be taken to reach the objective,
>>     actions which are relevant during the I-D life cycle within the WG.
>>     But I guess this is a broader discussion.
>>
>>
>>
>>         Adrian (still thinking about this)
>>
>>             -----Original Message-----
>>             From: BESS [mailto:bess-bounces@ietf.org
>>             <mailto:bess-bounces@ietf.org>] On Behalf Of Martin Vigoureux
>>             Sent: 24 November 2015 23:17
>>             To: bess@ietf.org <mailto:bess@ietf.org>
>>             Subject: Re: [bess] Introducing a one-implementation
>>             requirement before WG
>>             last calls
>>
>>             Hi Adrian,
>>
>>             indeed, minutes should have been available sooner. situation
>>             has been
>>             corrected.
>>
>>             The basic motivation for this is simply to avoid
>>             (over)loading the iesg
>>             with documents that have no (and could possibly never have
>> an)
>>             implementation. Or, at least, if every spec gets
>>             implemented, it is to
>>             prioritize them.
>>
>>             The discussion happened at the beginning of the meeting. It
>>             was on one
>>             of the slides I have presented as part of the WG status.
>>
>>             -m
>>
>>             Le 24/11/2015 17:07, Adrian Farrel a écrit :
>>
>>                 Hi Thomas,
>>
>>                 It's really hard to enter this discussion with any
>> context.
>>
>>                 Could you post the minutes from the meeting and maybe
>>                 summarise the points
>>
>>             in
>>
>>                 favour of this approach?
>>                 (Of course, I can listen to the audio when I have some
>>                 spare time.)
>>
>>                 Thanks,
>>                 Adrian
>>
>>                 _______________________________________________
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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Hello Kireeti,

thanks for your inputs.
I understand the challenge that "release x.y @shipping date d" might 
pose. What we want, is to go beyond the "I am aware of an 
implementation" type of response. It might currently be sufficient with 
regards to the shepherd write-up question, but won't be any more if we 
introduce the requirement. We'd like to have tangible information. 
Giving "details on how much of the spec was implemented" is clearly 
going in that direction.

-m

Le 26/11/2015 02:26, Kireeti Kompella a écrit :
> Sounds like a good idea to me. One tweak: having an official "release x.y @shipping date d" is unlikely for a draft. The value of one implementation (vs more) is that it shows that a spec is implementable and reasonably complete. So, this should be the focus, with details on how much of the spec was implemented. Shipping plans should be totally optional.
>
> Note that even an experimental implementation takes effort, is likely to become official, and shows a degree of seriousness of the part of the implementor.  Asking for greater commitment at WGLC is (imho) asking too much.
>
> Kireeti
>
>> On Nov 24, 2015, at 01:03, Thomas Morin <thomas.morin@orange.com> wrote:
>>
>> Hello everyone,
>>
>> Following the positive feedback received during BESS meeting in Yokohama about introducing a one-implementation requirement in BESS, we propose to do the following for future WG last calls:
>>
>> As a prerequisite before doing a working group last call on a document, the chairs will ask the working group for known implementations of the specifications; a relatively detailed level of information will be required (e.g. "release x.y of solution z shipping date d", "all features implemented", "partial implementation only", etc.) and everyone will be invited to reply (not only co-authors of the specifications); the chairs will then do the working group last call if satisfying information was provided on at least one implementation.
>>
>> We are open for comments on this proposal until December 7th.
>>
>> Martin & Thomas
>>
>> _______________________________________________
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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Hi Andrew,

Andrew G. Malis :
> - There are some (many?) operators that won’t put drafts into an RFP, 
> only RFCs.

My take on that is that if a known-stable specs is considered as 
something important to have, operators will put it in their RFPs (maybe 
not as a strict compliance requirement, but certainly as something 
having significant visibility). If they don't, it means that they simply 
aren't looking at new work and noy unlikely to ask anything that vendor 
arent' already implementing or seriously planning to implement.

> - There are some (many?) vendors that won’t implement a draft or RFC, 
> no matter how good the quality, unless they have a customer that wants 
> the feature. That could be an existing customer that needs the feature 
> operationally (which could lead to early implementation), or it could 
> be a prospective customer with an RFP.

This can surely happen on a case by case basis, but in my experience I 
have seen a large number of mature and stable draft having multiple 
implementations before, sometimes long before, having the final 'RFC' 
stamp.   People have learned to get the benefits of, and live with the 
drawbacks of,  early implementations.

Remember we are not talking about gating the progress of specs not 
implemented yet by everyone, but of stable specs that noone has 
implemented yet.


>
> - Vendors, of course, prioritize their implementation plans, and they 
> usually put RFCs ahead of drafts, since drafts could change before 
> publication, requiring a change in the implementation.
>
> For all these reasons, unless there’s an existing customer that needs 
> a draft’s features to fix an operational problem, it’s less common for 
> vendors to implement drafts than RFCs.


With reference to these RFP/RFC considerations, I think we need to focus 
on developing the right tools to:
- keep this idea of 'raising the bar'
- find a way to advertise that a draft is stable enough to be 
implemented and referred to by operators


> A better approach might be to do an implementation poll just prior to 
> WG LC (including implementation plans). The WG can then take the 
> results of the poll into consideration during WG LC to see if there’s 
> a consensus to send it to the IESG. There could be a draft that 
> everyone agrees is really important to get published, but for whatever 
> reason hasn’t yet been implemented.

Not delaying the WG LC  for lack-of-implementation reasons would 
certainly have the merit of allowing the WG to reach consensus on the 
stability of the specs and advertise this fact by other means that "this 
doc goes to IESG now".  The "Waiting for implementation" state 
introduced by IDR (mentioned by John Scudder during BESS meeting) seems 
to be the right tool for the job.

And I agree we should allow chairs to propose skipping the "Waiting for 
implementation" step of a draft not having convincing implementation 
plans, if there is consensus in the WG to do so.

-Thomas







>
> On Wed, Nov 25, 2015 at 5:19 PM, Martin Vigoureux 
> <martin.vigoureux@alcatel-lucent.com 
> <mailto:martin.vigoureux@alcatel-lucent.com>> wrote:
>
>     Adrian,
>
>     Thanks.
>     Please see my reactions in-line.
>
>     -m
>
>     Le 25/11/2015 01:13, Adrian Farrel a écrit :
>
>         Yeah, thanks Martin.
>
>         The slide has...
>
>         ==Raising the bar?==
>         . Some documents are being pushed to IESG but
>         without any implementation (plan) to support
>         them
>         . We are thinking of "requiring" that at least one
>         implementation exists before handing the
>         document to IESG
>         . Thoughts?
>
>         The first bullet allows for a plan to implement, the second
>         requires
>         implementation. The use of quotes in the second bullet
>         suggests that you may be
>         considering that the requirement may be flexible. Obviously we
>         have an opening
>         for discussion, but I wonder how you would decide when to be
>         flexible.
>
>
>     Good question :-) Indeed, the intent is to not be blindly strict.
>     But defining the margins of flexibility is the tricky part then.
>     I am pretty sure that this will be on a case by case with the
>     default being the 1 implem requirement.
>     I'll take an example: draft-ietf-bess-pta-flags
>     It defines 2 registries as well as a new BGP Extended Community
>     together with the associated processing procedures. The latter is
>     definitely subject to being implemented and as such subject to the
>     requirement we are discussing.
>     However, what this document really does is to define a mechanism
>     in support of specific needs.
>     So I think that this could be a case where we could skip the 1
>     implem requirement (but apply it to the specs that use pta-flags).
>
>         The minutes are a good indication of the level of support you
>         received in the
>         room, but not a deep discussion :-) There seems to be some
>         confusion in the
>         discussion between expediting (or unblocking) I-Ds that have
>         an implementation,
>         and delaying (or blocking) I-Ds that don't have
>         implementations. While, in a
>         world of limited resources, the two things are related,
>         ideally we are not
>         significantly gating the progress of one I-D because we are
>         busy processing
>         another.
>
>     I'd say there are different points of view rather than confusion.
>     In a situation where implementations are not considered mandatory,
>     having one might indeed be a criteria for moving faster through
>     the process but I think this is one amongst several possible other
>     criterion.
>
>         Now, I really, really support your motivation, viz. to reduce
>         the pointless,
>         unreviewed, unnecessary, or substandard drafts being sent for
>         publication. The
>         question is how to achieve that.
>
>     The primary intent here is to send to IESG only documents that
>     have an implementation. It makes their case stronger, is a
>     contribution to reducing the load on IESG's shoulders, and also it
>     anyway makes little sense to push through the standardization
>     process an implementable specification but for which no
>     implementation exists.
>     The moment to submit to iesg is definitely a good time (and the
>     last possible from a chair's perspective) to think about that.
>
>     Now, your two sentences above open the door to a broader set of
>     potential actions that could be taken to reach the objective,
>     actions which are relevant during the I-D life cycle within the
>     WG. But I guess this is a broader discussion.
>
>
>
>         Adrian (still thinking about this)
>
>             -----Original Message-----
>             From: BESS [mailto:bess-bounces@ietf.org
>             <mailto:bess-bounces@ietf.org>] On Behalf Of Martin Vigoureux
>             Sent: 24 November 2015 23:17
>             To: bess@ietf.org <mailto:bess@ietf.org>
>             Subject: Re: [bess] Introducing a one-implementation
>             requirement before WG
>             last calls
>
>             Hi Adrian,
>
>             indeed, minutes should have been available sooner.
>             situation has been
>             corrected.
>
>             The basic motivation for this is simply to avoid
>             (over)loading the iesg
>             with documents that have no (and could possibly never have an)
>             implementation. Or, at least, if every spec gets
>             implemented, it is to
>             prioritize them.
>
>             The discussion happened at the beginning of the meeting.
>             It was on one
>             of the slides I have presented as part of the WG status.
>
>             -m
>
>             Le 24/11/2015 17:07, Adrian Farrel a écrit :
>
>                 Hi Thomas,
>
>                 It's really hard to enter this discussion with any
>                 context.
>
>                 Could you post the minutes from the meeting and maybe
>                 summarise the points
>
>             in
>
>                 favour of this approach?
>                 (Of course, I can listen to the audio when I have some
>                 spare time.)
>
>                 Thanks,
>                 Adrian
>


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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Kireeti, Martin,

Any data related to a serious implementation (even a beta without a 
shipping date), would I think be convincing enough.
"release x.y @shipping date d" was simply provided as a possible answer, 
not of the minimum requirement to be convincing.

As Martin said we need more than "I am aware of an implementation".
I would say we also need more than "we plan to implement".

There are cases where we may need more detailed data.
Take for instance the case of a draft that needs specific dataplane 
support: would we accept as convincing enough an implementation on a 
software-only platform, in the absence of any vendor planning to 
implement on hardware ?

-Thomas



Martin Vigoureux :
> Hello Kireeti,
>
> thanks for your inputs.
> I understand the challenge that "release x.y @shipping date d" might 
> pose. What we want, is to go beyond the "I am aware of an 
> implementation" type of response. It might currently be sufficient 
> with regards to the shepherd write-up question, but won't be any more 
> if we introduce the requirement. We'd like to have tangible 
> information. Giving "details on how much of the spec was implemented" 
> is clearly going in that direction.
>
> -m
>
> Le 26/11/2015 02:26, Kireeti Kompella a écrit :
>> Sounds like a good idea to me. One tweak: having an official "release 
>> x.y @shipping date d" is unlikely for a draft. The value of one 
>> implementation (vs more) is that it shows that a spec is 
>> implementable and reasonably complete. So, this should be the focus, 
>> with details on how much of the spec was implemented. Shipping plans 
>> should be totally optional.
>>
>> Note that even an experimental implementation takes effort, is likely 
>> to become official, and shows a degree of seriousness of the part of 
>> the implementor.  Asking for greater commitment at WGLC is (imho) 
>> asking too much.
>>
>> Kireeti
>>
>>> On Nov 24, 2015, at 01:03, Thomas Morin <thomas.morin@orange.com> 
>>> wrote:
>>>
>>> Hello everyone,
>>>
>>> Following the positive feedback received during BESS meeting in 
>>> Yokohama about introducing a one-implementation requirement in BESS, 
>>> we propose to do the following for future WG last calls:
>>>
>>> As a prerequisite before doing a working group last call on a 
>>> document, the chairs will ask the working group for known 
>>> implementations of the specifications; a relatively detailed level 
>>> of information will be required (e.g. "release x.y of solution z 
>>> shipping date d", "all features implemented", "partial 
>>> implementation only", etc.) and everyone will be invited to reply 
>>> (not only co-authors of the specifications); the chairs will then do 
>>> the working group last call if satisfying information was provided 
>>> on at least one implementation.
>>>
>>> We are open for comments on this proposal until December 7th.
>>>
>>> Martin & Thomas


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From: <thomas.morin@orange.com>
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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Hi Loa,

Loa Andersson :
> One can speculate about the reasons for this, but it seems that often
> the decision whether or not to disclose an implementation is outside
> the mandate for people participating in immediate IETF process.

I would find it quite unlikely to be in a situation where none of the 
vendors implementing a stable spec would have the ability  of disclosing 
it.  I would expect the people who are close to the IETF, if they have 
an interest in seeing the spec progress, to be able to spend the time so 
that someone else sends an appropriate email to bess@ietf.org.

-Thomas




>
> On 2015-11-26 06:57, Andrew G. Malis wrote:
>> Based on my experience on both the vendor and operator side, I see some
>> practical problems with this approach:
>>
>> - There are some (many?) operators that won’t put drafts into an RFP,
>> only RFCs.
>>
>> - There are some (many?) vendors that won’t implement a draft or RFC, no
>> matter how good the quality, unless they have a customer that wants the
>> feature. That could be an existing customer that needs the feature
>> operationally (which could lead to early implementation), or it could be
>> a prospective customer with an RFP.
>>
>> - Vendors, of course, prioritize their implementation plans, and they
>> usually put RFCs ahead of drafts, since drafts could change before
>> publication, requiring a change in the implementation.
>>
>> For all these reasons, unless there’s an existing customer that needs a
>> draft’s features to fix an operational problem, it’s less common for
>> vendors to implement drafts than RFCs.
>>
>> A better approach might be to do an implementation poll just prior to WG
>> LC (including implementation plans). The WG can then take the results of
>> the poll into consideration during WG LC to see if there’s a consensus
>> to send it to the IESG. There could be a draft that everyone agrees is
>> really important to get published, but for whatever reason hasn’t yet
>> been implemented.
>>
>> Cheers,
>> Andy
>>
>>
>> On Wed, Nov 25, 2015 at 5:19 PM, Martin Vigoureux
>> <martin.vigoureux@alcatel-lucent.com
>> <mailto:martin.vigoureux@alcatel-lucent.com>> wrote:
>>
>>     Adrian,
>>
>>     Thanks.
>>     Please see my reactions in-line.
>>
>>     -m
>>
>>     Le 25/11/2015 01:13, Adrian Farrel a écrit :
>>
>>         Yeah, thanks Martin.
>>
>>         The slide has...
>>
>>         ==Raising the bar?==
>>         . Some documents are being pushed to IESG but
>>         without any implementation (plan) to support
>>         them
>>         . We are thinking of "requiring" that at least one
>>         implementation exists before handing the
>>         document to IESG
>>         . Thoughts?
>>
>>         The first bullet allows for a plan to implement, the second 
>> requires
>>         implementation. The use of quotes in the second bullet suggests
>>         that you may be
>>         considering that the requirement may be flexible. Obviously we
>>         have an opening
>>         for discussion, but I wonder how you would decide when to be
>>         flexible.
>>
>>
>>     Good question :-) Indeed, the intent is to not be blindly strict.
>>     But defining the margins of flexibility is the tricky part then.
>>     I am pretty sure that this will be on a case by case with the
>>     default being the 1 implem requirement.
>>     I'll take an example: draft-ietf-bess-pta-flags
>>     It defines 2 registries as well as a new BGP Extended Community
>>     together with the associated processing procedures. The latter is
>>     definitely subject to being implemented and as such subject to the
>>     requirement we are discussing.
>>     However, what this document really does is to define a mechanism in
>>     support of specific needs.
>>     So I think that this could be a case where we could skip the 1
>>     implem requirement (but apply it to the specs that use pta-flags).
>>
>>         The minutes are a good indication of the level of support you
>>         received in the
>>         room, but not a deep discussion :-) There seems to be some
>>         confusion in the
>>         discussion between expediting (or unblocking) I-Ds that have an
>>         implementation,
>>         and delaying (or blocking) I-Ds that don't have implementations.
>>         While, in a
>>         world of limited resources, the two things are related, ideally
>>         we are not
>>         significantly gating the progress of one I-D because we are busy
>>         processing
>>         another.
>>
>>     I'd say there are different points of view rather than confusion. In
>>     a situation where implementations are not considered mandatory,
>>     having one might indeed be a criteria for moving faster through the
>>     process but I think this is one amongst several possible other
>>     criterion.
>>
>>         Now, I really, really support your motivation, viz. to reduce
>>         the pointless,
>>         unreviewed, unnecessary, or substandard drafts being sent for
>>         publication. The
>>         question is how to achieve that.
>>
>>     The primary intent here is to send to IESG only documents that have
>>     an implementation. It makes their case stronger, is a contribution
>>     to reducing the load on IESG's shoulders, and also it anyway makes
>>     little sense to push through the standardization process an
>>     implementable specification but for which no implementation exists.
>>     The moment to submit to iesg is definitely a good time (and the last
>>     possible from a chair's perspective) to think about that.
>>
>>     Now, your two sentences above open the door to a broader set of
>>     potential actions that could be taken to reach the objective,
>>     actions which are relevant during the I-D life cycle within the WG.
>>     But I guess this is a broader discussion.
>>
>>
>>
>>         Adrian (still thinking about this)
>>
>>             -----Original Message-----
>>             From: BESS [mailto:bess-bounces@ietf.org
>>             <mailto:bess-bounces@ietf.org>] On Behalf Of Martin 
>> Vigoureux
>>             Sent: 24 November 2015 23:17
>>             To: bess@ietf.org <mailto:bess@ietf.org>
>>             Subject: Re: [bess] Introducing a one-implementation
>>             requirement before WG
>>             last calls
>>
>>             Hi Adrian,
>>
>>             indeed, minutes should have been available sooner. situation
>>             has been
>>             corrected.
>>
>>             The basic motivation for this is simply to avoid
>>             (over)loading the iesg
>>             with documents that have no (and could possibly never 
>> have an)
>>             implementation. Or, at least, if every spec gets
>>             implemented, it is to
>>             prioritize them.
>>
>>             The discussion happened at the beginning of the meeting. It
>>             was on one
>>             of the slides I have presented as part of the WG status.
>>
>>             -m
>>
>>             Le 24/11/2015 17:07, Adrian Farrel a écrit :
>>
>>                 Hi Thomas,
>>
>>                 It's really hard to enter this discussion with any 
>> context.
>>
>>                 Could you post the minutes from the meeting and maybe
>>                 summarise the points
>>
>>             in
>>
>>                 favour of this approach?
>>                 (Of course, I can listen to the audio when I have some
>>                 spare time.)
>>
>>                 Thanks,
>>                 Adrian


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From: "Patrice Brissette (pbrisset)" <pbrisset@cisco.com>
To: "thomas.morin@orange.com" <thomas.morin@orange.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] Introducing a one-implementation requirement before WG last calls
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Date: Thu, 26 Nov 2015 14:13:34 +0000
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References: <04a401d126d2$3791e170$a6b5a450$@olddog.co.uk> <5654EFEB.4000101@alcatel-lucent.com> <057501d12716$2c7c4340$8574c9c0$@olddog.co.uk> <565633EC.2080700@alcatel-lucent.com> <CAA=duU2Ux-r7OpWiFMm6LqpO+EYyQhM41aeB9vy-jYRztcz6WQ@mail.gmail.com> <56569A3F.7090406@pi.nu> <11585_1448546512_565710D0_11585_7065_9_565710CF.7080000@orange.com>
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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Folks,

Have we look at our =B3forum=B2 such as OpenStack?
Do they have something in place there?


Regards,

Patrice

   Patrice Brissette
TECHNICAL LEADER.ENGINEERING

pbrisset@cisco.com
Phone: +1 613 254 3336

Cisco Systems Canada Co. / Les Systemes Cisco Canada CIE
Canada
Cisco.com <http://www.cisco.com/global/CA/>

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On 2015-11-26, 9:01 AM, "BESS on behalf of thomas.morin@orange.com"
<bess-bounces@ietf.org on behalf of thomas.morin@orange.com> wrote:

>Hi Loa,
>
>Loa Andersson :
>> One can speculate about the reasons for this, but it seems that often
>> the decision whether or not to disclose an implementation is outside
>> the mandate for people participating in immediate IETF process.
>
>I would find it quite unlikely to be in a situation where none of the
>vendors implementing a stable spec would have the ability  of disclosing
>it.  I would expect the people who are close to the IETF, if they have
>an interest in seeing the spec progress, to be able to spend the time so
>that someone else sends an appropriate email to bess@ietf.org.
>
>-Thomas
>
>
>
>
>>
>> On 2015-11-26 06:57, Andrew G. Malis wrote:
>>> Based on my experience on both the vendor and operator side, I see some
>>> practical problems with this approach:
>>>
>>> - There are some (many?) operators that won=B9t put drafts into an RFP,
>>> only RFCs.
>>>
>>> - There are some (many?) vendors that won=B9t implement a draft or RFC,
>>>no
>>> matter how good the quality, unless they have a customer that wants the
>>> feature. That could be an existing customer that needs the feature
>>> operationally (which could lead to early implementation), or it could
>>>be
>>> a prospective customer with an RFP.
>>>
>>> - Vendors, of course, prioritize their implementation plans, and they
>>> usually put RFCs ahead of drafts, since drafts could change before
>>> publication, requiring a change in the implementation.
>>>
>>> For all these reasons, unless there=B9s an existing customer that needs=
 a
>>> draft=B9s features to fix an operational problem, it=B9s less common fo=
r
>>> vendors to implement drafts than RFCs.
>>>
>>> A better approach might be to do an implementation poll just prior to
>>>WG
>>> LC (including implementation plans). The WG can then take the results
>>>of
>>> the poll into consideration during WG LC to see if there=B9s a consensu=
s
>>> to send it to the IESG. There could be a draft that everyone agrees is
>>> really important to get published, but for whatever reason hasn=B9t yet
>>> been implemented.
>>>
>>> Cheers,
>>> Andy
>>>
>>>
>>> On Wed, Nov 25, 2015 at 5:19 PM, Martin Vigoureux
>>> <martin.vigoureux@alcatel-lucent.com
>>> <mailto:martin.vigoureux@alcatel-lucent.com>> wrote:
>>>
>>>     Adrian,
>>>
>>>     Thanks.
>>>     Please see my reactions in-line.
>>>
>>>     -m
>>>
>>>     Le 25/11/2015 01:13, Adrian Farrel a =E9crit :
>>>
>>>         Yeah, thanks Martin.
>>>
>>>         The slide has...
>>>
>>>         =3D=3DRaising the bar?=3D=3D
>>>         . Some documents are being pushed to IESG but
>>>         without any implementation (plan) to support
>>>         them
>>>         . We are thinking of "requiring" that at least one
>>>         implementation exists before handing the
>>>         document to IESG
>>>         . Thoughts?
>>>
>>>         The first bullet allows for a plan to implement, the second
>>> requires
>>>         implementation. The use of quotes in the second bullet suggests
>>>         that you may be
>>>         considering that the requirement may be flexible. Obviously we
>>>         have an opening
>>>         for discussion, but I wonder how you would decide when to be
>>>         flexible.
>>>
>>>
>>>     Good question :-) Indeed, the intent is to not be blindly strict.
>>>     But defining the margins of flexibility is the tricky part then.
>>>     I am pretty sure that this will be on a case by case with the
>>>     default being the 1 implem requirement.
>>>     I'll take an example: draft-ietf-bess-pta-flags
>>>     It defines 2 registries as well as a new BGP Extended Community
>>>     together with the associated processing procedures. The latter is
>>>     definitely subject to being implemented and as such subject to the
>>>     requirement we are discussing.
>>>     However, what this document really does is to define a mechanism in
>>>     support of specific needs.
>>>     So I think that this could be a case where we could skip the 1
>>>     implem requirement (but apply it to the specs that use pta-flags).
>>>
>>>         The minutes are a good indication of the level of support you
>>>         received in the
>>>         room, but not a deep discussion :-) There seems to be some
>>>         confusion in the
>>>         discussion between expediting (or unblocking) I-Ds that have an
>>>         implementation,
>>>         and delaying (or blocking) I-Ds that don't have
>>>implementations.
>>>         While, in a
>>>         world of limited resources, the two things are related, ideally
>>>         we are not
>>>         significantly gating the progress of one I-D because we are
>>>busy
>>>         processing
>>>         another.
>>>
>>>     I'd say there are different points of view rather than confusion.
>>>In
>>>     a situation where implementations are not considered mandatory,
>>>     having one might indeed be a criteria for moving faster through the
>>>     process but I think this is one amongst several possible other
>>>     criterion.
>>>
>>>         Now, I really, really support your motivation, viz. to reduce
>>>         the pointless,
>>>         unreviewed, unnecessary, or substandard drafts being sent for
>>>         publication. The
>>>         question is how to achieve that.
>>>
>>>     The primary intent here is to send to IESG only documents that have
>>>     an implementation. It makes their case stronger, is a contribution
>>>     to reducing the load on IESG's shoulders, and also it anyway makes
>>>     little sense to push through the standardization process an
>>>     implementable specification but for which no implementation exists.
>>>     The moment to submit to iesg is definitely a good time (and the
>>>last
>>>     possible from a chair's perspective) to think about that.
>>>
>>>     Now, your two sentences above open the door to a broader set of
>>>     potential actions that could be taken to reach the objective,
>>>     actions which are relevant during the I-D life cycle within the WG.
>>>     But I guess this is a broader discussion.
>>>
>>>
>>>
>>>         Adrian (still thinking about this)
>>>
>>>             -----Original Message-----
>>>             From: BESS [mailto:bess-bounces@ietf.org
>>>             <mailto:bess-bounces@ietf.org>] On Behalf Of Martin
>>> Vigoureux
>>>             Sent: 24 November 2015 23:17
>>>             To: bess@ietf.org <mailto:bess@ietf.org>
>>>             Subject: Re: [bess] Introducing a one-implementation
>>>             requirement before WG
>>>             last calls
>>>
>>>             Hi Adrian,
>>>
>>>             indeed, minutes should have been available sooner.
>>>situation
>>>             has been
>>>             corrected.
>>>
>>>             The basic motivation for this is simply to avoid
>>>             (over)loading the iesg
>>>             with documents that have no (and could possibly never
>>> have an)
>>>             implementation. Or, at least, if every spec gets
>>>             implemented, it is to
>>>             prioritize them.
>>>
>>>             The discussion happened at the beginning of the meeting. It
>>>             was on one
>>>             of the slides I have presented as part of the WG status.
>>>
>>>             -m
>>>
>>>             Le 24/11/2015 17:07, Adrian Farrel a =E9crit :
>>>
>>>                 Hi Thomas,
>>>
>>>                 It's really hard to enter this discussion with any
>>> context.
>>>
>>>                 Could you post the minutes from the meeting and maybe
>>>                 summarise the points
>>>
>>>             in
>>>
>>>                 favour of this approach?
>>>                 (Of course, I can listen to the audio when I have some
>>>                 spare time.)
>>>
>>>                 Thanks,
>>>                 Adrian
>
>
>__________________________________________________________________________
>_______________________________________________
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To: "Patrice Brissette (pbrisset)" <pbrisset@cisco.com>, "bess@ietf.org" <bess@ietf.org>
References: <04a401d126d2$3791e170$a6b5a450$@olddog.co.uk> <5654EFEB.4000101@alcatel-lucent.com> <057501d12716$2c7c4340$8574c9c0$@olddog.co.uk> <565633EC.2080700@alcatel-lucent.com> <CAA=duU2Ux-r7OpWiFMm6LqpO+EYyQhM41aeB9vy-jYRztcz6WQ@mail.gmail.com> <56569A3F.7090406@pi.nu> <11585_1448546512_565710D0_11585_7065_9_565710CF.7080000@orange.com> <D27C7D91.7B0D9%pbrisset@cisco.com>
From: <thomas.morin@orange.com>
Organization: Orange
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Date: Thu, 26 Nov 2015 15:45:09 +0100
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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Hi Patrice,

2015-11-26, Patrice Brissette (pbrisset):
>
> Have we look at our ³forum² such as OpenStack?
> Do they have something in place there?

Producing standards and producing implementations are different things.

Openstack produces implementations, which may then may (or may not) 
become a de-facto standard. In that sense Openstack has a built-in 
mandatory implementation step before anything can have a chance of 
becoming a de-facto standard later.

The Openstack community also write specifications before implementing 
things, but these have zero value as standard, and haven't much value 
before they are actually implementing.

Then there is the case of Openstack components having plugin 
architectures. Neutron comes to mind, obviously. The Openstack has a 
pretty strong culture of not giving an community-supported kind of 
official value to an extension of the API that would not be supported by 
one of the reference opensource drivers.

The idea of mandating such a thing as "at least one opensource 
implementation" for IETF would be interesting to toy with. That would be 
quite refreshing. :)

-Thomas



> On 2015-11-26, 9:01 AM, "BESS on behalf of thomas.morin@orange.com"
> <bess-bounces@ietf.org on behalf of thomas.morin@orange.com> wrote:
>
>> Hi Loa,
>>
>> Loa Andersson :
>>> One can speculate about the reasons for this, but it seems that often
>>> the decision whether or not to disclose an implementation is outside
>>> the mandate for people participating in immediate IETF process.
>>
>> I would find it quite unlikely to be in a situation where none of the
>> vendors implementing a stable spec would have the ability  of disclosing
>> it.  I would expect the people who are close to the IETF, if they have
>> an interest in seeing the spec progress, to be able to spend the time so
>> that someone else sends an appropriate email to bess@ietf.org.
>>
>> -Thomas
>>
>>
>>
>>
>>>
>>> On 2015-11-26 06:57, Andrew G. Malis wrote:
>>>> Based on my experience on both the vendor and operator side, I see some
>>>> practical problems with this approach:
>>>>
>>>> - There are some (many?) operators that won¹t put drafts into an RFP,
>>>> only RFCs.
>>>>
>>>> - There are some (many?) vendors that won¹t implement a draft or RFC,
>>>> no
>>>> matter how good the quality, unless they have a customer that wants the
>>>> feature. That could be an existing customer that needs the feature
>>>> operationally (which could lead to early implementation), or it could
>>>> be
>>>> a prospective customer with an RFP.
>>>>
>>>> - Vendors, of course, prioritize their implementation plans, and they
>>>> usually put RFCs ahead of drafts, since drafts could change before
>>>> publication, requiring a change in the implementation.
>>>>
>>>> For all these reasons, unless there¹s an existing customer that needs a
>>>> draft¹s features to fix an operational problem, it¹s less common for
>>>> vendors to implement drafts than RFCs.
>>>>
>>>> A better approach might be to do an implementation poll just prior to
>>>> WG
>>>> LC (including implementation plans). The WG can then take the results
>>>> of
>>>> the poll into consideration during WG LC to see if there¹s a consensus
>>>> to send it to the IESG. There could be a draft that everyone agrees is
>>>> really important to get published, but for whatever reason hasn¹t yet
>>>> been implemented.
>>>>
>>>> Cheers,
>>>> Andy
>>>>
>>>>
>>>> On Wed, Nov 25, 2015 at 5:19 PM, Martin Vigoureux
>>>> <martin.vigoureux@alcatel-lucent.com
>>>> <mailto:martin.vigoureux@alcatel-lucent.com>> wrote:
>>>>
>>>>      Adrian,
>>>>
>>>>      Thanks.
>>>>      Please see my reactions in-line.
>>>>
>>>>      -m
>>>>
>>>>      Le 25/11/2015 01:13, Adrian Farrel a écrit :
>>>>
>>>>          Yeah, thanks Martin.
>>>>
>>>>          The slide has...
>>>>
>>>>          ==Raising the bar?==
>>>>          . Some documents are being pushed to IESG but
>>>>          without any implementation (plan) to support
>>>>          them
>>>>          . We are thinking of "requiring" that at least one
>>>>          implementation exists before handing the
>>>>          document to IESG
>>>>          . Thoughts?
>>>>
>>>>          The first bullet allows for a plan to implement, the second
>>>> requires
>>>>          implementation. The use of quotes in the second bullet suggests
>>>>          that you may be
>>>>          considering that the requirement may be flexible. Obviously we
>>>>          have an opening
>>>>          for discussion, but I wonder how you would decide when to be
>>>>          flexible.
>>>>
>>>>
>>>>      Good question :-) Indeed, the intent is to not be blindly strict.
>>>>      But defining the margins of flexibility is the tricky part then.
>>>>      I am pretty sure that this will be on a case by case with the
>>>>      default being the 1 implem requirement.
>>>>      I'll take an example: draft-ietf-bess-pta-flags
>>>>      It defines 2 registries as well as a new BGP Extended Community
>>>>      together with the associated processing procedures. The latter is
>>>>      definitely subject to being implemented and as such subject to the
>>>>      requirement we are discussing.
>>>>      However, what this document really does is to define a mechanism in
>>>>      support of specific needs.
>>>>      So I think that this could be a case where we could skip the 1
>>>>      implem requirement (but apply it to the specs that use pta-flags).
>>>>
>>>>          The minutes are a good indication of the level of support you
>>>>          received in the
>>>>          room, but not a deep discussion :-) There seems to be some
>>>>          confusion in the
>>>>          discussion between expediting (or unblocking) I-Ds that have an
>>>>          implementation,
>>>>          and delaying (or blocking) I-Ds that don't have
>>>> implementations.
>>>>          While, in a
>>>>          world of limited resources, the two things are related, ideally
>>>>          we are not
>>>>          significantly gating the progress of one I-D because we are
>>>> busy
>>>>          processing
>>>>          another.
>>>>
>>>>      I'd say there are different points of view rather than confusion.
>>>> In
>>>>      a situation where implementations are not considered mandatory,
>>>>      having one might indeed be a criteria for moving faster through the
>>>>      process but I think this is one amongst several possible other
>>>>      criterion.
>>>>
>>>>          Now, I really, really support your motivation, viz. to reduce
>>>>          the pointless,
>>>>          unreviewed, unnecessary, or substandard drafts being sent for
>>>>          publication. The
>>>>          question is how to achieve that.
>>>>
>>>>      The primary intent here is to send to IESG only documents that have
>>>>      an implementation. It makes their case stronger, is a contribution
>>>>      to reducing the load on IESG's shoulders, and also it anyway makes
>>>>      little sense to push through the standardization process an
>>>>      implementable specification but for which no implementation exists.
>>>>      The moment to submit to iesg is definitely a good time (and the
>>>> last
>>>>      possible from a chair's perspective) to think about that.
>>>>
>>>>      Now, your two sentences above open the door to a broader set of
>>>>      potential actions that could be taken to reach the objective,
>>>>      actions which are relevant during the I-D life cycle within the WG.
>>>>      But I guess this is a broader discussion.
>>>>
>>>>
>>>>
>>>>          Adrian (still thinking about this)
>>>>
>>>>              -----Original Message-----
>>>>              From: BESS [mailto:bess-bounces@ietf.org
>>>>              <mailto:bess-bounces@ietf.org>] On Behalf Of Martin
>>>> Vigoureux
>>>>              Sent: 24 November 2015 23:17
>>>>              To: bess@ietf.org <mailto:bess@ietf.org>
>>>>              Subject: Re: [bess] Introducing a one-implementation
>>>>              requirement before WG
>>>>              last calls
>>>>
>>>>              Hi Adrian,
>>>>
>>>>              indeed, minutes should have been available sooner.
>>>> situation
>>>>              has been
>>>>              corrected.
>>>>
>>>>              The basic motivation for this is simply to avoid
>>>>              (over)loading the iesg
>>>>              with documents that have no (and could possibly never
>>>> have an)
>>>>              implementation. Or, at least, if every spec gets
>>>>              implemented, it is to
>>>>              prioritize them.
>>>>
>>>>              The discussion happened at the beginning of the meeting. It
>>>>              was on one
>>>>              of the slides I have presented as part of the WG status.
>>>>
>>>>              -m
>>>>
>>>>              Le 24/11/2015 17:07, Adrian Farrel a écrit :
>>>>
>>>>                  Hi Thomas,
>>>>
>>>>                  It's really hard to enter this discussion with any
>>>> context.
>>>>
>>>>                  Could you post the minutes from the meeting and maybe
>>>>                  summarise the points
>>>>
>>>>              in
>>>>
>>>>                  favour of this approach?
>>>>                  (Of course, I can listen to the audio when I have some
>>>>                  spare time.)
>>>>
>>>>                  Thanks,
>>>>                  Adrian
>>
>>

_________________________________________________________________________________________________________________________

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From nobody Thu Nov 26 09:01:10 2015
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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Perhaps it is time to recall RFC 6982.
While that RFC says nothing about setting hurdles (so that debate needs =
to continue) it does provide a lightweight way of tracking =
implementations and noting what bits of I-Ds have been implemented.

Yaron and I can report mixed results from the RFC so far: sometime there =
has been a degree of enthusiasm to report implementations (free =
marketing?) while other times implementations that we know are out there =
have sullenly refused to present details for inclusion in I-Ds. Draw =
your own conclusions :-)

Adrian

> -----Original Message-----
> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Thomas Morin
> Sent: 26 November 2015 13:50
> To: bess@ietf.org
> Subject: Re: [bess] Introducing a one-implementation requirement =
before WG
> last calls
>=20
> Kireeti, Martin,
>=20
> Any data related to a serious implementation (even a beta without a
> shipping date), would I think be convincing enough.
> "release x.y @shipping date d" was simply provided as a possible =
answer,
> not of the minimum requirement to be convincing.
>=20
> As Martin said we need more than "I am aware of an implementation".
> I would say we also need more than "we plan to implement".
>=20
> There are cases where we may need more detailed data.
> Take for instance the case of a draft that needs specific dataplane
> support: would we accept as convincing enough an implementation on a
> software-only platform, in the absence of any vendor planning to
> implement on hardware ?
>=20
> -Thomas
>=20
>=20
>=20
> Martin Vigoureux :
> > Hello Kireeti,
> >
> > thanks for your inputs.
> > I understand the challenge that "release x.y @shipping date d" might
> > pose. What we want, is to go beyond the "I am aware of an
> > implementation" type of response. It might currently be sufficient
> > with regards to the shepherd write-up question, but won't be any =
more
> > if we introduce the requirement. We'd like to have tangible
> > information. Giving "details on how much of the spec was =
implemented"
> > is clearly going in that direction.
> >
> > -m
> >
> > Le 26/11/2015 02:26, Kireeti Kompella a =C3=A9crit :
> >> Sounds like a good idea to me. One tweak: having an official =
"release
> >> x.y @shipping date d" is unlikely for a draft. The value of one
> >> implementation (vs more) is that it shows that a spec is
> >> implementable and reasonably complete. So, this should be the =
focus,
> >> with details on how much of the spec was implemented. Shipping =
plans
> >> should be totally optional.
> >>
> >> Note that even an experimental implementation takes effort, is =
likely
> >> to become official, and shows a degree of seriousness of the part =
of
> >> the implementor.  Asking for greater commitment at WGLC is (imho)
> >> asking too much.
> >>
> >> Kireeti
> >>
> >>> On Nov 24, 2015, at 01:03, Thomas Morin <thomas.morin@orange.com>
> >>> wrote:
> >>>
> >>> Hello everyone,
> >>>
> >>> Following the positive feedback received during BESS meeting in
> >>> Yokohama about introducing a one-implementation requirement in =
BESS,
> >>> we propose to do the following for future WG last calls:
> >>>
> >>> As a prerequisite before doing a working group last call on a
> >>> document, the chairs will ask the working group for known
> >>> implementations of the specifications; a relatively detailed level
> >>> of information will be required (e.g. "release x.y of solution z
> >>> shipping date d", "all features implemented", "partial
> >>> implementation only", etc.) and everyone will be invited to reply
> >>> (not only co-authors of the specifications); the chairs will then =
do
> >>> the working group last call if satisfying information was provided
> >>> on at least one implementation.
> >>>
> >>> We are open for comments on this proposal until December 7th.
> >>>
> >>> Martin & Thomas
>=20
> _______________________________________________
> BESS mailing list
> BESS@ietf.org
> https://www.ietf.org/mailman/listinfo/bess


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To: thomas.morin@orange.com, bess@ietf.org
References: <04a401d126d2$3791e170$a6b5a450$@olddog.co.uk> <5654EFEB.4000101@alcatel-lucent.com> <057501d12716$2c7c4340$8574c9c0$@olddog.co.uk> <565633EC.2080700@alcatel-lucent.com> <CAA=duU2Ux-r7OpWiFMm6LqpO+EYyQhM41aeB9vy-jYRztcz6WQ@mail.gmail.com> <56569A3F.7090406@pi.nu> <11585_1448546512_565710D0_11585_7065_9_565710CF.7080000@orange.com>
From: Loa Andersson <loa@pi.nu>
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Date: Fri, 27 Nov 2015 10:15:27 +0800
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Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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Thomas,

On 2015-11-26 22:01, thomas.morin@orange.com wrote:
> Hi Loa,
>
> Loa Andersson :
>> One can speculate about the reasons for this, but it seems that often
>> the decision whether or not to disclose an implementation is outside
>> the mandate for people participating in immediate IETF process.
>
> I would find it quite unlikely to be in a situation where none of the
> vendors implementing a stable spec would have the ability  of disclosing
> it.  I would expect the people who are close to the IETF, if they have
> an interest in seeing the spec progress, to be able to spend the time so
> that someone else sends an appropriate email to bess@ietf.org.

Well - I'm not questioning the ability. What I've said that there might
be situations where a vendor are unwilling to disclose. And that as far
as I understand it this most often has nothing to do with the IETF
process.

To quote Adrian:
"...implementations that we know are out there have sullenly refused to 
present details for inclusion in I-Ds".

I've been watching demos (e.g. at MPLS conferences, where it is obvious
that drafts that we are about to ask for publication for (or just have)
must be part of the demo. Asking the "people who are close to the IETF"
just result in "not my decision"!


Having said that I still support what you are doing, only that we should
be careful not to get our expectations up to high based on this action.

/Loa


>
> -Thomas
>
>
>
>
>>
>> On 2015-11-26 06:57, Andrew G. Malis wrote:
>>> Based on my experience on both the vendor and operator side, I see some
>>> practical problems with this approach:
>>>
>>> - There are some (many?) operators that won’t put drafts into an RFP,
>>> only RFCs.
>>>
>>> - There are some (many?) vendors that won’t implement a draft or RFC, no
>>> matter how good the quality, unless they have a customer that wants the
>>> feature. That could be an existing customer that needs the feature
>>> operationally (which could lead to early implementation), or it could be
>>> a prospective customer with an RFP.
>>>
>>> - Vendors, of course, prioritize their implementation plans, and they
>>> usually put RFCs ahead of drafts, since drafts could change before
>>> publication, requiring a change in the implementation.
>>>
>>> For all these reasons, unless there’s an existing customer that needs a
>>> draft’s features to fix an operational problem, it’s less common for
>>> vendors to implement drafts than RFCs.
>>>
>>> A better approach might be to do an implementation poll just prior to WG
>>> LC (including implementation plans). The WG can then take the results of
>>> the poll into consideration during WG LC to see if there’s a consensus
>>> to send it to the IESG. There could be a draft that everyone agrees is
>>> really important to get published, but for whatever reason hasn’t yet
>>> been implemented.
>>>
>>> Cheers,
>>> Andy
>>>
>>>
>>> On Wed, Nov 25, 2015 at 5:19 PM, Martin Vigoureux
>>> <martin.vigoureux@alcatel-lucent.com
>>> <mailto:martin.vigoureux@alcatel-lucent.com>> wrote:
>>>
>>>     Adrian,
>>>
>>>     Thanks.
>>>     Please see my reactions in-line.
>>>
>>>     -m
>>>
>>>     Le 25/11/2015 01:13, Adrian Farrel a écrit :
>>>
>>>         Yeah, thanks Martin.
>>>
>>>         The slide has...
>>>
>>>         ==Raising the bar?==
>>>         . Some documents are being pushed to IESG but
>>>         without any implementation (plan) to support
>>>         them
>>>         . We are thinking of "requiring" that at least one
>>>         implementation exists before handing the
>>>         document to IESG
>>>         . Thoughts?
>>>
>>>         The first bullet allows for a plan to implement, the second
>>> requires
>>>         implementation. The use of quotes in the second bullet suggests
>>>         that you may be
>>>         considering that the requirement may be flexible. Obviously we
>>>         have an opening
>>>         for discussion, but I wonder how you would decide when to be
>>>         flexible.
>>>
>>>
>>>     Good question :-) Indeed, the intent is to not be blindly strict.
>>>     But defining the margins of flexibility is the tricky part then.
>>>     I am pretty sure that this will be on a case by case with the
>>>     default being the 1 implem requirement.
>>>     I'll take an example: draft-ietf-bess-pta-flags
>>>     It defines 2 registries as well as a new BGP Extended Community
>>>     together with the associated processing procedures. The latter is
>>>     definitely subject to being implemented and as such subject to the
>>>     requirement we are discussing.
>>>     However, what this document really does is to define a mechanism in
>>>     support of specific needs.
>>>     So I think that this could be a case where we could skip the 1
>>>     implem requirement (but apply it to the specs that use pta-flags).
>>>
>>>         The minutes are a good indication of the level of support you
>>>         received in the
>>>         room, but not a deep discussion :-) There seems to be some
>>>         confusion in the
>>>         discussion between expediting (or unblocking) I-Ds that have an
>>>         implementation,
>>>         and delaying (or blocking) I-Ds that don't have implementations.
>>>         While, in a
>>>         world of limited resources, the two things are related, ideally
>>>         we are not
>>>         significantly gating the progress of one I-D because we are busy
>>>         processing
>>>         another.
>>>
>>>     I'd say there are different points of view rather than confusion. In
>>>     a situation where implementations are not considered mandatory,
>>>     having one might indeed be a criteria for moving faster through the
>>>     process but I think this is one amongst several possible other
>>>     criterion.
>>>
>>>         Now, I really, really support your motivation, viz. to reduce
>>>         the pointless,
>>>         unreviewed, unnecessary, or substandard drafts being sent for
>>>         publication. The
>>>         question is how to achieve that.
>>>
>>>     The primary intent here is to send to IESG only documents that have
>>>     an implementation. It makes their case stronger, is a contribution
>>>     to reducing the load on IESG's shoulders, and also it anyway makes
>>>     little sense to push through the standardization process an
>>>     implementable specification but for which no implementation exists.
>>>     The moment to submit to iesg is definitely a good time (and the last
>>>     possible from a chair's perspective) to think about that.
>>>
>>>     Now, your two sentences above open the door to a broader set of
>>>     potential actions that could be taken to reach the objective,
>>>     actions which are relevant during the I-D life cycle within the WG.
>>>     But I guess this is a broader discussion.
>>>
>>>
>>>
>>>         Adrian (still thinking about this)
>>>
>>>             -----Original Message-----
>>>             From: BESS [mailto:bess-bounces@ietf.org
>>>             <mailto:bess-bounces@ietf.org>] On Behalf Of Martin
>>> Vigoureux
>>>             Sent: 24 November 2015 23:17
>>>             To: bess@ietf.org <mailto:bess@ietf.org>
>>>             Subject: Re: [bess] Introducing a one-implementation
>>>             requirement before WG
>>>             last calls
>>>
>>>             Hi Adrian,
>>>
>>>             indeed, minutes should have been available sooner. situation
>>>             has been
>>>             corrected.
>>>
>>>             The basic motivation for this is simply to avoid
>>>             (over)loading the iesg
>>>             with documents that have no (and could possibly never
>>> have an)
>>>             implementation. Or, at least, if every spec gets
>>>             implemented, it is to
>>>             prioritize them.
>>>
>>>             The discussion happened at the beginning of the meeting. It
>>>             was on one
>>>             of the slides I have presented as part of the WG status.
>>>
>>>             -m
>>>
>>>             Le 24/11/2015 17:07, Adrian Farrel a écrit :
>>>
>>>                 Hi Thomas,
>>>
>>>                 It's really hard to enter this discussion with any
>>> context.
>>>
>>>                 Could you post the minutes from the meeting and maybe
>>>                 summarise the points
>>>
>>>             in
>>>
>>>                 favour of this approach?
>>>                 (Of course, I can listen to the audio when I have some
>>>                 spare time.)
>>>
>>>                 Thanks,
>>>                 Adrian
>
>
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From nobody Fri Nov 27 18:03:42 2015
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Subject: [bess] I-D Action: draft-ietf-bess-virtual-subnet-06.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
 This draft is a work item of the BGP Enabled Services Working Group of the IETF.

        Title           : Virtual Subnet: A BGP/MPLS IP VPN-based Subnet Extension Solution
        Authors         : Xiaohu Xu
                          Robert Raszuk
                          Christian Jacquenet
                          Truman Boyes
                          Brendan Fee
	Filename        : draft-ietf-bess-virtual-subnet-06.txt
	Pages           : 14
	Date            : 2015-11-27

Abstract:
   This document describes a BGP/MPLS IP VPN-based subnet extension
   solution referred to as Virtual Subnet, which can be used for
   building Layer 3 network virtualization overlays within and/or
   between data centers.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-virtual-subnet/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-bess-virtual-subnet-06

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-virtual-subnet-06


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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Hi Jorge,

Your point,AC  per Vlan, suppose I want to provision for my customer as vlan bundle then how to handle. Kindly explain.

Regards,
Sudhin

On Mon, 30 Nov 2015 11:49:59 +0530 "Rabadan, Jorge (Jorge)"  wrote
> 


 



Hi Sudhin,



Please see in-line.
Thanks.
Jorge










From: BESS  on behalf of sudeep g ggg 

Date: Wednesday, November 25, 2015 at 2:58 PM

To: "bess@ietf.org" 

Subject: [bess] REG: draft-rabadan-bess-evpn-ac-df-02







Respected Authors,



I had gone through the draft at high level,I am happy to see a real provider provisioning issues addressed in your draft. Much appreciated.



Some key highlights in your draft.



1. No changes.

2. Using existing features to address a problem.

3. Addresses provisioning issues.






[JORGE] not only provisioning issues but also ‘logical’ failures like an "Attachment Circuit” going oper-down due to OAM or admin shutdown.










How ever I have following queries.



May I know how to deal with vlan provisioning issues like one PE will have vlan 2,3,4 and other PE will have 3,4 this will end up in both PE's as DF correct me if I am wrong, you use type 1 Ad per ES and EVI for DF election, how about vlan issues.






[JORGE] the draft talks about how to influence the DF election based on the status of an “Attachment Circuit (AC)”. For VLAN-based services, a customer VID equals an AC (and there is a single VLAN per EVI per ES), hence in this case you can actually catch
 VLAN provisioning mistakes, i.e. if you don’t provision VLAN 2 in PE1, PE1 won’t ever send the AD per EVI route for that VLAN, hence PE1 won’t be elected the DF within the ES in any PE using the AD per-EVI route in the DF election.










May I know how to handle transient loop during 3 seconds period during DF election.May I know the state of PE during the DF election, clarity required[humble opinion].






[JORGE] the draft is not changing the DF election itself (where, by the way, there is no transient loops). It is only removing PEs from the candidate DF list for a given EVI based on the presence of the AD per-EVI route. All the rest of the RFC7432 procedures
 are kept intact.












This seems to be a good customer focused solution. I appreciate it.[please note: this is my humble opinion as an individual not representing any one]



Regards,

Sudhin Jacob




























Get your own

FREE website, 
FREE domain & 
FREE mobile app with Company email. 

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 More >







 
 

--=_11f4072177c73e6b34f504f9e4d6ad90
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset="UTF-8"

Hi Jorge,<br />
<br />
Your point,AC  per Vlan, suppose I want to provision for my customer as vla=
n bundle then how to handle. Kindly explain.<br />
<br />
Regards,<br />
Sudhin<br />
<br />
On Mon, 30 Nov 2015 11:49:59 +0530 "Rabadan, Jorge (Jorge)" <jorge.rabadan@=
alcatel-lucent.com> wrote<br />
> <br />
<br />
<br />
 <br />
<br />
<br />
<br />
Hi Sudhin,<br />
<br />
<br />
<br />
Please see in-line.<br />
Thanks.<br />
Jorge<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
From: BESS <bess-bounces@ietf.org> on behalf of sudeep g ggg <sudhinjacob@r=
ediffmail.com><br />
<br />
Date: Wednesday, November 25, 2015 at 2:58 PM<br />
<br />
To: "bess@ietf.org" <bess@ietf.org><br />
<br />
Subject: [bess] REG: draft-rabadan-bess-evpn-ac-df-02<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Respected Authors,<br />
<br />
<br />
<br />
I had gone through the draft at high level,I am happy to see a real provide=
r provisioning issues addressed in your draft. Much appreciated.<br />
<br />
<br />
<br />
Some key highlights in your draft.<br />
<br />
<br />
<br />
1. No changes.<br />
<br />
2. Using existing features to address a problem.<br />
<br />
3. Addresses provisioning issues.<br />
<br />
<br />
<br />
<br />
<br />
<br />
[JORGE] not only provisioning issues but also =E2=80=98logical=E2=80=99 fai=
lures like an "Attachment Circuit=E2=80=9D going oper-down due to OAM or ad=
min shutdown.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
How ever I have following queries.<br />
<br />
<br />
<br />
May I know how to deal with vlan provisioning issues like one PE will have =
vlan 2,3,4 and other PE will have 3,4 this will end up in both PE's as DF c=
orrect me if I am wrong, you use type 1 Ad per ES and EVI for DF election, =
how about vlan issues.<br />
<br />
<br />
<br />
<br />
<br />
<br />
[JORGE] the draft talks about how to influence the DF election based on the=
 status of an =E2=80=9CAttachment Circuit (AC)=E2=80=9D. For VLAN-based ser=
vices, a customer VID equals an AC (and there is a single VLAN per EVI per =
ES), hence in this case you can actually catch<br />
 VLAN provisioning mistakes, i.e. if you don=E2=80=99t provision VLAN 2 in =
PE1, PE1 won=E2=80=99t ever send the AD per EVI route for that VLAN, hence =
PE1 won=E2=80=99t be elected the DF within the ES in any PE using the AD pe=
r-EVI route in the DF election.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
May I know how to handle transient loop during 3 seconds period during DF e=
lection.May I know the state of PE during the DF election, clarity required=
[humble opinion].<br />
<br />
<br />
<br />
<br />
<br />
<br />
[JORGE] the draft is not changing the DF election itself (where, by the way=
, there is no transient loops). It is only removing PEs from the candidate =
DF list for a given EVI based on the presence of the AD per-EVI route. All =
the rest of the RFC7432 procedures<br />
 are kept intact.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
This seems to be a good customer focused solution. I appreciate it.[please =
note: this is my humble opinion as an individual not representing any one]<=
br />
<br />
<br />
<br />
Regards,<br />
<br />
Sudhin Jacob<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Get your own<br />
<br />
FREE website, <br />
FREE domain & <br />
FREE mobile app with Company email. <br />
<br />
Know<br />
 More ><br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
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Hi Jorge,

Section 2.1.1. Current DF election procedure and AC failures

If AC2 is accidentally shutdown or even not configured, CE12
traffic will be impacted. In case of all-active multi-homing, only
the BUM traffic to CE12 will be impacted, whereas for single-active
multi-homing all the traffic to/from CE12 will be discarded. This is
due to the fact that a logical failure in PE-2 AC2 will not trigger
an ES route withdrawn for ESI12 (since there are still other ACs
active on ESI12) and therefore PE-1 will not re-run the DF election
procedures.

In Single Active a sub interface goes down, it will send a type 4 withdrawal and other PE will become DF based. This is taken care in SA but AA it makes sense.

How about the 3 second timer, there will be a loop if there is transition of PE's moving to DF to NON DF when a new PE as added or a link failure. During this time, may I know how the traffic is handled because RFC is not clear about that period. How you are going to tackle that issue.During this transition period if both PE starts forwarding the traffic there will be a loop, how to address that.

If you are using AC per Vlan but customers require vlan bundle, some times local switching how to handle those situations. Kindly clarify.

Correct me if I am wrong.

Regards,
Sudhin







On Mon, 30 Nov 2015 11:50:09 +0530 "Rabadan, Jorge (Jorge)"  wrote
> 


 



Hi Sudhin,



Please see in-line.
Thanks.
Jorge










From: BESS  on behalf of sudeep g ggg 

Date: Wednesday, November 25, 2015 at 2:58 PM

To: "bess@ietf.org" 

Subject: [bess] REG: draft-rabadan-bess-evpn-ac-df-02







Respected Authors,



I had gone through the draft at high level,I am happy to see a real provider provisioning issues addressed in your draft. Much appreciated.



Some key highlights in your draft.



1. No changes.

2. Using existing features to address a problem.

3. Addresses provisioning issues.






[JORGE] not only provisioning issues but also ‘logical’ failures like an "Attachment Circuit” going oper-down due to OAM or admin shutdown.










How ever I have following queries.



May I know how to deal with vlan provisioning issues like one PE will have vlan 2,3,4 and other PE will have 3,4 this will end up in both PE's as DF correct me if I am wrong, you use type 1 Ad per ES and EVI for DF election, how about vlan issues.






[JORGE] the draft talks about how to influence the DF election based on the status of an “Attachment Circuit (AC)”. For VLAN-based services, a customer VID equals an AC (and there is a single VLAN per EVI per ES), hence in this case you can actually catch
 VLAN provisioning mistakes, i.e. if you don’t provision VLAN 2 in PE1, PE1 won’t ever send the AD per EVI route for that VLAN, hence PE1 won’t be elected the DF within the ES in any PE using the AD per-EVI route in the DF election.










May I know how to handle transient loop during 3 seconds period during DF election.May I know the state of PE during the DF election, clarity required[humble opinion].






[JORGE] the draft is not changing the DF election itself (where, by the way, there is no transient loops). It is only removing PEs from the candidate DF list for a given EVI based on the presence of the AD per-EVI route. All the rest of the RFC7432 procedures
 are kept intact.












This seems to be a good customer focused solution. I appreciate it.[please note: this is my humble opinion as an individual not representing any one]



Regards,

Sudhin Jacob




























Get your own

FREE website, 
FREE domain & 
FREE mobile app with Company email. 

Know
 More >







 
 
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--=_3c79701cb91e5c95368e464a2b4554b5
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset="UTF-8"

Hi Jorge,<br />
<br />
Section 2.1.1. Current DF election procedure and AC failures<br />
<br />
If AC2 is accidentally shutdown or even not configured, CE12<br />
traffic will be impacted. In case of all-active multi-homing, only<br />
the BUM traffic to CE12 will be impacted, whereas for single-active<br />
multi-homing all the traffic to/from CE12 will be discarded. This is<br />
due to the fact that a logical failure in PE-2 AC2 will not trigger<br />
an ES route withdrawn for ESI12 (since there are still other ACs<br />
active on ESI12) and therefore PE-1 will not re-run the DF election<br />
procedures.<br />
<br />
In Single Active a sub interface goes down, it will send a type 4 withdrawa=
l and other PE will become DF based. This is taken care in SA but AA it mak=
es sense.<br />
<br />
How about the 3 second timer, there will be a loop if there is transition o=
f PE's moving to DF to NON DF when a new PE as added or a link failure. Dur=
ing this time, may I know how the traffic is handled because RFC is not cle=
ar about that period. How you are going to tackle that issue.During this tr=
ansition period if both PE starts forwarding the traffic there will be a lo=
op, how to address that.<br />
<br />
If you are using AC per Vlan but customers require vlan bundle, some times =
local switching how to handle those situations. Kindly clarify.<br />
<br />
Correct me if I am wrong.<br />
<br />
Regards,<br />
Sudhin<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
On Mon, 30 Nov 2015 11:50:09 +0530 "Rabadan, Jorge (Jorge)" <jorge.rabadan@=
alcatel-lucent.com> wrote<br />
> <br />
<br />
<br />
 <br />
<br />
<br />
<br />
Hi Sudhin,<br />
<br />
<br />
<br />
Please see in-line.<br />
Thanks.<br />
Jorge<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
From: BESS <bess-bounces@ietf.org> on behalf of sudeep g ggg <sudhinjacob@r=
ediffmail.com><br />
<br />
Date: Wednesday, November 25, 2015 at 2:58 PM<br />
<br />
To: "bess@ietf.org" <bess@ietf.org><br />
<br />
Subject: [bess] REG: draft-rabadan-bess-evpn-ac-df-02<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Respected Authors,<br />
<br />
<br />
<br />
I had gone through the draft at high level,I am happy to see a real provide=
r provisioning issues addressed in your draft. Much appreciated.<br />
<br />
<br />
<br />
Some key highlights in your draft.<br />
<br />
<br />
<br />
1. No changes.<br />
<br />
2. Using existing features to address a problem.<br />
<br />
3. Addresses provisioning issues.<br />
<br />
<br />
<br />
<br />
<br />
<br />
[JORGE] not only provisioning issues but also =E2=80=98logical=E2=80=99 fai=
lures like an "Attachment Circuit=E2=80=9D going oper-down due to OAM or ad=
min shutdown.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
How ever I have following queries.<br />
<br />
<br />
<br />
May I know how to deal with vlan provisioning issues like one PE will have =
vlan 2,3,4 and other PE will have 3,4 this will end up in both PE's as DF c=
orrect me if I am wrong, you use type 1 Ad per ES and EVI for DF election, =
how about vlan issues.<br />
<br />
<br />
<br />
<br />
<br />
<br />
[JORGE] the draft talks about how to influence the DF election based on the=
 status of an =E2=80=9CAttachment Circuit (AC)=E2=80=9D. For VLAN-based ser=
vices, a customer VID equals an AC (and there is a single VLAN per EVI per =
ES), hence in this case you can actually catch<br />
 VLAN provisioning mistakes, i.e. if you don=E2=80=99t provision VLAN 2 in =
PE1, PE1 won=E2=80=99t ever send the AD per EVI route for that VLAN, hence =
PE1 won=E2=80=99t be elected the DF within the ES in any PE using the AD pe=
r-EVI route in the DF election.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
May I know how to handle transient loop during 3 seconds period during DF e=
lection.May I know the state of PE during the DF election, clarity required=
[humble opinion].<br />
<br />
<br />
<br />
<br />
<br />
<br />
[JORGE] the draft is not changing the DF election itself (where, by the way=
, there is no transient loops). It is only removing PEs from the candidate =
DF list for a given EVI based on the presence of the AD per-EVI route. All =
the rest of the RFC7432 procedures<br />
 are kept intact.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
This seems to be a good customer focused solution. I appreciate it.[please =
note: this is my humble opinion as an individual not representing any one]<=
br />
<br />
<br />
<br />
Regards,<br />
<br />
Sudhin Jacob<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Get your own<br />
<br />
FREE website, <br />
FREE domain & <br />
FREE mobile app with Company email. <br />
<br />
Know<br />
 More ><br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
 <br />
 <br />
_______________________________________________<br />
<br />
BESS mailing list<br />
<br />
BESS@ietf.org<br />
<br />
https://www.ietf.org/mailman/listinfo/bess<br />
<br />
<br><Table border=3D0 Width=3D100% Height=3D57 cellspacing=3D0 cellpadding=
=3D0 style=3D"font-family:Verdana;font-size:11px;line-height:15px;"><TR><td=
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--=_3c79701cb91e5c95368e464a2b4554b5--


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From: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>
To: sudeep g ggg <sudhinjacob@rediffmail.com>
Thread-Topic: [bess] REG: draft-rabadan-bess-evpn-ac-df-02
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From: "Rabadan, Jorge (Jorge)" <jorge.rabadan@alcatel-lucent.com>
To: sudeep g ggg <sudhinjacob@rediffmail.com>
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Cc: Benson Schliesser <bensons@queuefull.net>, "Joel M. Halpern" <jmh@joelhalpern.com>
Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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I am very strongly opposed to this "proposal".

It takes the WG in the wrong direction, and attempts explicitly to undo
the work that led to RFC4794, which eliminated some of the time-wasting
requirements that served only to further extend the already slow IETF
process.

The right time to preserve a specification in an archived form (such as
an RFC) is when the specification has stabilized. Implementation and
deployment sometimes do not occur for years afterward, at which time the
the original authors and/or editors of the specification might have
moved on to other pursuits. In WGs that do have implementation
requirements, specification that were implemented years ago often sit
around as internet-drafts for extended periods of time, just because no
one is available to restart the standardization process. Often the
drafts expire, and sometimes remain expired for years after they've been
deployed. This creates considerable confusion about whether the drafts
have been abandoned.

There is also the point that Andy has raised, that delaying publication
may also delay deployment.

I believe it is improper for the IETF to be demanding details about
implementations, release cycles, and release dates.  It should be noted 
that it becomes quite difficult to gather this sort of information about 
a draft that has been sitting around for years, especially if that draft 
has has been implemented and deployed piecemeal.

There are also some process issues to discuss.

> [Martin] the point of our e-mail is to continue the discussion on the
> list. We explicitly say that this is a proposal and that we are open
> to comments.

The email in question certainly suggests that the WG chairs have already
made a decision to impose a new requirement, but are allowing two weeks
(during what is a holiday season for many) for "discussion" before they 
announce that there is a consensus in favor of their proposal.  This 
does not seem like an appropriate approach, and imho would be worthy of 
appeal.

The routing area used to have more implementation requirements, but
after extensive discussion in 2006 (discussion lasting more than two
weeks), these requirements were eliminated by RFC4794.  The reason is
clear enough.  Quoting RFC4794:

    "Today, one of the big problems the IETF faces is timeliness.
    Applying additional rules to a certain class of protocols hurts the
    IETF's ability to publish specifications in a timely manner."

I don't think anything has changed since the topic was discussed in
2006.  We should be looking for ways to speed up the process, not
looking for even more ways to slow it down.

> [Adrian] To be clear, the WG is allowed to make a decision to do
> this. http://datatracker.ietf.org/doc/rfc4794/

Are you referring to the following paragraph:

    Some working groups within the Routing Area have developed
    procedures, based on RFC 1264, to require implementations before
    forwarding a document to the IESG.  This action does not prevent
    those working groups from continuing with these procedures if the
    working group prefers to work this way.  We encourage working groups
    to put measures in place to improve the quality of their output.

I don't see that this gives individual WGs (not to mention WG chairs)
any right to impose arbitrary new rules.  It only allows them to keep
existing rules.  The most it says about allowing the creation of new
rules is:

    that does not prohibit the Routing Area Directors from requiring
    implementation and/or operational experience

though this presumably would also be subject to appeal if it were
applied arbitrarily.

> [Martin] The basic motivation for this is simply to avoid
> (over)loading the iesg with documents that have no (and could
> possibly never have an) implementation.

I don't think the problem of AD workload can be addressed by having a 
single WG add more delay to its process.  Certainly I don't agree that 
the IESG workload problem should be addressed by having the IETF do less 
work.






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From: Xuxiaohu <xuxiaohu@huawei.com>
To: Eric C Rosen <erosen@juniper.net>, Martin Vigoureux <martin.vigoureux@alcatel-lucent.com>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] Introducing a one-implementation requirement before WG last calls
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Cc: Benson Schliesser <bensons@queuefull.net>, "Joel M. Halpern" <jmh@joelhalpern.com>
Subject: Re: [bess] Introducing a one-implementation requirement before WG last calls
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I fully agree with Eric's points. In addition to the side-effects Eric had =
raised, I think it may intensify the monopolization in specification due to=
 the implementation requirement before WG LC. For example, some giants coul=
d afford the implementation of whatever specifications they had proposed. H=
owever, for SMEs, they tend to start the implementation only when the speci=
fication has been standardized (e.g., RFC publishment).

Best regards,
Xiaohu

> -----Original Message-----
> From: BESS [mailto:bess-bounces@ietf.org] On Behalf Of Eric C Rosen
> Sent: Monday, November 30, 2015 11:33 PM
> To: Martin Vigoureux; bess@ietf.org
> Cc: Benson Schliesser; Joel M. Halpern
> Subject: Re: [bess] Introducing a one-implementation requirement before W=
G
> last calls
>=20
> I am very strongly opposed to this "proposal".
>=20
> It takes the WG in the wrong direction, and attempts explicitly to undo t=
he work
> that led to RFC4794, which eliminated some of the time-wasting requiremen=
ts
> that served only to further extend the already slow IETF process.
>=20
> The right time to preserve a specification in an archived form (such as a=
n RFC) is
> when the specification has stabilized. Implementation and deployment
> sometimes do not occur for years afterward, at which time the the origina=
l
> authors and/or editors of the specification might have moved on to other
> pursuits. In WGs that do have implementation requirements, specification =
that
> were implemented years ago often sit around as internet-drafts for extend=
ed
> periods of time, just because no one is available to restart the standard=
ization
> process. Often the drafts expire, and sometimes remain expired for years =
after
> they've been deployed. This creates considerable confusion about whether =
the
> drafts have been abandoned.
>=20
> There is also the point that Andy has raised, that delaying publication m=
ay also
> delay deployment.
>=20
> I believe it is improper for the IETF to be demanding details about
> implementations, release cycles, and release dates.  It should be noted t=
hat it
> becomes quite difficult to gather this sort of information about a draft =
that has
> been sitting around for years, especially if that draft has has been impl=
emented
> and deployed piecemeal.
>=20
> There are also some process issues to discuss.
>=20
> > [Martin] the point of our e-mail is to continue the discussion on the
> > list. We explicitly say that this is a proposal and that we are open
> > to comments.
>=20
> The email in question certainly suggests that the WG chairs have already =
made a
> decision to impose a new requirement, but are allowing two weeks (during =
what
> is a holiday season for many) for "discussion" before they announce that =
there is
> a consensus in favor of their proposal.  This does not seem like an appro=
priate
> approach, and imho would be worthy of appeal.
>=20
> The routing area used to have more implementation requirements, but after
> extensive discussion in 2006 (discussion lasting more than two weeks), th=
ese
> requirements were eliminated by RFC4794.  The reason is clear enough.
> Quoting RFC4794:
>=20
>     "Today, one of the big problems the IETF faces is timeliness.
>     Applying additional rules to a certain class of protocols hurts the
>     IETF's ability to publish specifications in a timely manner."
>=20
> I don't think anything has changed since the topic was discussed in 2006.=
  We
> should be looking for ways to speed up the process, not looking for even =
more
> ways to slow it down.
>=20
> > [Adrian] To be clear, the WG is allowed to make a decision to do this.
> > http://datatracker.ietf.org/doc/rfc4794/
>=20
> Are you referring to the following paragraph:
>=20
>     Some working groups within the Routing Area have developed
>     procedures, based on RFC 1264, to require implementations before
>     forwarding a document to the IESG.  This action does not prevent
>     those working groups from continuing with these procedures if the
>     working group prefers to work this way.  We encourage working groups
>     to put measures in place to improve the quality of their output.
>=20
> I don't see that this gives individual WGs (not to mention WG chairs) any=
 right to
> impose arbitrary new rules.  It only allows them to keep existing rules. =
 The
> most it says about allowing the creation of new rules is:
>=20
>     that does not prohibit the Routing Area Directors from requiring
>     implementation and/or operational experience
>=20
> though this presumably would also be subject to appeal if it were applied
> arbitrarily.
>=20
> > [Martin] The basic motivation for this is simply to avoid
> > (over)loading the iesg with documents that have no (and could possibly
> > never have an) implementation.
>=20
> I don't think the problem of AD workload can be addressed by having a sin=
gle
> WG add more delay to its process.  Certainly I don't agree that the IESG
> workload problem should be addressed by having the IETF do less work.
>=20
>=20
>=20
>=20
>=20
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