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Dear all,

The draft agenda for the IDR session has been posted:

https://datatracker.ietf.org/meeting/100/materials/agenda-100-idr/


If you see any problem with it, or if there are additional items to discuss=
, please let us know.

Presenters,

Please prepare to send your slides to me and CC the chairs. The deadline fo=
r slides is 24 hours prior to the session (note we are on Monday this time)=
 , though earlier is better.

And please take a look at the checklist for presenting at IDR:
https://trac.tools.ietf.org/wg/idr/trac/wiki/Checklist%20for%20presenting%2=
0at%20an%20IDR%20meeting

Best regards,
Jie


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<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear all, <o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">The draft agenda for the IDR se=
ssion has been posted:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><a href=3D"https://datatracker.=
ietf.org/meeting/100/materials/agenda-100-idr/">https://datatracker.ietf.or=
g/meeting/100/materials/agenda-100-idr/</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">If you see any problem with =
it, or if there are additional items to discuss, please let us know.<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Presenters, <o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Please prepare to send your sli=
des to me and CC the chairs. The deadline for slides is 24 hours prior to t=
he session (note we are on Monday this time) , though earlier is better.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">And please take a look at the c=
hecklist for presenting at IDR:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><a href=3D"https://trac.tools.i=
etf.org/wg/idr/trac/wiki/Checklist%20for%20presenting%20at%20an%20IDR%20mee=
ting">https://trac.tools.ietf.org/wg/idr/trac/wiki/Checklist%20for%20presen=
ting%20at%20an%20IDR%20meeting</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Best regards,<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jie<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</body>
</html>

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Subject: [Idr] [Errata Held for Document Update] RFC4760 (5120)
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The following errata report has been held for document update 
for RFC4760, "Multiprotocol Extensions for BGP-4". 

--------------------------------------
You may review the report below and at:
http://www.rfc-editor.org/errata/eid5120

--------------------------------------
Status: Held for Document Update
Type: Editorial

Reported by: Dale Worley <worley@ariadne.com>
Date Reported: 2017-09-23
Held by: Alvaro Retana (IESG)

Section: global

Original Text
-------------
section 3:  ... each NLRI ... [2 occurrences]

section 5:  The Network Layer Reachability information is encoded as ...


Corrected Text
--------------
... each NLRI item ...

When the Subsequent Address Family Identifier field is set to one of
the values defined in this document (1 or 2), the NLRI field is encoded
as ...


Notes
-----
The text in section 3 makes it clear that the NLRI encoding in section 5 is only
specified for SAFI 1 and 2, but the text in section 5 does not state this.  This tends
to cause readers to believe that section 5 applies to any SAFI.  (See, e.g.,
draft-ietf-mpls-rfc3107bis.)  (However, other RFCs do specify similar encoding structures
for some other SAFIs; see, e.g., RFC 3107.)

The wording "each NLRI" is incorrect, as NLRI is a field and there is only one of them in an UPDATE message.

--------------------------------------
RFC4760 (draft-ietf-idr-rfc2858bis-10)
--------------------------------------
Title               : Multiprotocol Extensions for BGP-4
Publication Date    : January 2007
Author(s)           : T. Bates, R. Chandra, D. Katz, Y. Rekhter
Category            : DRAFT STANDARD
Source              : Inter-Domain Routing
Area                : Routing
Stream              : IETF
Verifying Party     : IESG


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Subject: [Idr] [Errata Verified] RFC5575 (5043)
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The following errata report has been verified for RFC5575,
"Dissemination of Flow Specification Rules". 

--------------------------------------
You may review the report below and at:
http://www.rfc-editor.org/errata/eid5043

--------------------------------------
Status: Verified
Type: Technical

Reported by: Jan Matejka <mq+rfc@ucw.cz>
Date Reported: 2017-06-20
Verified by: Alvaro Retana (IESG)

Section: 7

Original Text
-------------
        +--------+--------------------+--------------------------+
        | type   | extended community | encoding                 |
        +--------+--------------------+--------------------------+
        | 0x8006 | traffic-rate       | 2-byte as#, 4-byte float |
        | 0x8007 | traffic-action     | bitmask                  |
        | 0x8008 | redirect           | 6-byte Route Target      |
        | 0x8009 | traffic-marking    | DSCP value               |
        +--------+--------------------+--------------------------+

   Traffic-rate:  The traffic-rate extended community is a non-
      transitive extended community across the autonomous-system
      boundary and uses following extended community encoding:

Corrected Text
--------------

        +--------+--------------------+--------------------------+
        | type   | extended community | encoding                 |
        +--------+--------------------+--------------------------+
        | 0x8006 | traffic-rate       | 2-byte as#, 4-byte float |
        | 0x8007 | traffic-action     | bitmask                  |
        | 0x8008 | redirect           | 6-byte Route Target      |
        | 0x8009 | traffic-marking    | DSCP value               |
        +--------+--------------------+--------------------------+

   Traffic-rate:  The traffic-rate extended community
      uses following extended community encoding:

Notes
-----
The traffic rate type is allocated in the Transitive Experimental Range (https://www.iana.org/assignments/bgp-extended-communities/bgp-extended-communities.xhtml#bgp-extended-communities-10) but the text declares it non-transitive.

=====
[Alvaro Retana]

I am marking this report as Verified knowing that the issue is already being addressed in rfc5575bis.

--------------------------------------
RFC5575 (draft-ietf-idr-flow-spec-09)
--------------------------------------
Title               : Dissemination of Flow Specification Rules
Publication Date    : August 2009
Author(s)           : P. Marques, N. Sheth, R. Raszuk, B. Greene, J. Mauch, D. McPherson
Category            : PROPOSED STANDARD
Source              : Inter-Domain Routing
Area                : Routing
Stream              : IETF
Verifying Party     : IESG


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Alvaro: 

This is correct.   John  indicated the replacement
(draft-ietf-idr-rfc5575bis-05.txt) passed WG LC with the submission of
draft-ietf-idr-rfc5575bis-06.txt. 

Sue Hares 

-----Original Message-----
From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of RFC Errata System
Sent: Monday, November 6, 2017 5:01 PM
To: mq+rfc@ucw.cz; roque@cisco.com; nsheth@juniper.net; raszuk@cisco.com;
bgreene@juniper.net; jmauch@us.ntt.net; danny@arbor.net
Cc: idr@ietf.org; rfc-editor@rfc-editor.org; iesg@ietf.org
Subject: [Idr] [Errata Verified] RFC5575 (5043)

The following errata report has been verified for RFC5575, "Dissemination of
Flow Specification Rules". 

--------------------------------------
You may review the report below and at:
http://www.rfc-editor.org/errata/eid5043

--------------------------------------
Status: Verified
Type: Technical

Reported by: Jan Matejka <mq+rfc@ucw.cz> Date Reported: 2017-06-20 Verified
by: Alvaro Retana (IESG)

Section: 7

Original Text
-------------
        +--------+--------------------+--------------------------+
        | type   | extended community | encoding                 |
        +--------+--------------------+--------------------------+
        | 0x8006 | traffic-rate       | 2-byte as#, 4-byte float |
        | 0x8007 | traffic-action     | bitmask                  |
        | 0x8008 | redirect           | 6-byte Route Target      |
        | 0x8009 | traffic-marking    | DSCP value               |
        +--------+--------------------+--------------------------+

   Traffic-rate:  The traffic-rate extended community is a non-
      transitive extended community across the autonomous-system
      boundary and uses following extended community encoding:

Corrected Text
--------------

        +--------+--------------------+--------------------------+
        | type   | extended community | encoding                 |
        +--------+--------------------+--------------------------+
        | 0x8006 | traffic-rate       | 2-byte as#, 4-byte float |
        | 0x8007 | traffic-action     | bitmask                  |
        | 0x8008 | redirect           | 6-byte Route Target      |
        | 0x8009 | traffic-marking    | DSCP value               |
        +--------+--------------------+--------------------------+

   Traffic-rate:  The traffic-rate extended community
      uses following extended community encoding:

Notes
-----
The traffic rate type is allocated in the Transitive Experimental Range
(https://www.iana.org/assignments/bgp-extended-communities/bgp-extended-comm
unities.xhtml#bgp-extended-communities-10) but the text declares it
non-transitive.

=====
[Alvaro Retana]

I am marking this report as Verified knowing that the issue is already being
addressed in rfc5575bis.

--------------------------------------
RFC5575 (draft-ietf-idr-flow-spec-09)
--------------------------------------
Title               : Dissemination of Flow Specification Rules
Publication Date    : August 2009
Author(s)           : P. Marques, N. Sheth, R. Raszuk, B. Greene, J. Mauch,
D. McPherson
Category            : PROPOSED STANDARD
Source              : Inter-Domain Routing
Area                : Routing
Stream              : IETF
Verifying Party     : IESG

_______________________________________________
Idr mailing list
Idr@ietf.org
https://www.ietf.org/mailman/listinfo/idr


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This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages (11/12
to 11/26).  Please note this draft has at least 2 implementations.    Please
comment on whether you feel this draft is ready for publication.   

 

Susan Hares 

 

PS - the request for this WG LC is at:

https://www.ietf.org/mail-archive/web/idr/current/msg18801.html

 

 

 

 

 


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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal>This =
begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages (11/12 to =
11/26).&nbsp; Please note this draft has at least 2 implementations. =
&nbsp;&nbsp;&nbsp;Please comment on whether you feel this draft is ready =
for publication.&nbsp;&nbsp; <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Susan Hares =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
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From nobody Mon Nov 13 14:43:29 2017
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Subject: [Idr] FW: BGP yang data model question
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Forwarding comments from Himanshu.

=20

Sue Hares=20

=20

From: Shah, Himanshu [mailto:hshah@ciena.com]=20
Sent: Monday, November 13, 2017 1:48 AM
To: Keyur Patel; Susan Hares; 'Xufeng Liu'
Subject: Re: BGP yang data model question

=20

Forwarding as reminder as per today=E2=80=99s WG question.

=20

Please see at the bottom for the information.

=20

Thanks,

Himanshu

=20

From: Keyur Patel <keyur@arrcus.com>
Date: Friday, September 22, 2017 at 2:47 AM
To: "Shah, Himanshu" <hshah@ciena.com>, Susan Hares <shares@ndzh.com>, =
'Xufeng Liu' <Xufeng_Liu@jabil.com>
Subject: Re: BGP yang data model question

=20

Hi Himanshu,

=20

As Sue mentioned we should have an updated model soon for you to review. =
Furthermore, some of the commands you listed MAY NOT be present in the =
base model as they belong in what we call as augmented model. The =
breakdown detail will be made available soon.

=20

Hope all is well otherwise. J

=20

Regards,

Keyur

=20

From: "Shah, Himanshu" <hshah@ciena.com>
Date: Thursday, September 21, 2017 at 11:45 AM
To: Susan Hares <shares@ndzh.com>, 'Xufeng Liu' <Xufeng_Liu@jabil.com>, =
Keyur Patel <keyur@arrcus.com>
Subject: Re: BGP yang data model question

=20

Sue =E2=80=93

We are in the middle of implementation and would like to see this =
resolved sooner than later.

Any relief you can offer?

=20

Thanks,

Himanshu

=20

From: Susan Hares <shares@ndzh.com>
Date: Thursday, September 21, 2017 at 2:36 PM
To: 'Xufeng Liu' <Xufeng_Liu@jabil.com>, "Shah, Himanshu" =
<hshah@ciena.com>, 'Keyur Patel' <keyur@arrcus.com>
Subject: RE: BGP yang data model question

=20

Xufeng:

=20

We=E2=80=99re working on a revision to the BGP model.  I=E2=80=99m =
mid-way through checking the model.  Let me finish that so you can see =
it, and then I=E2=80=99ll send these questions over the weekend.=20

=20

Sue Hares

=20

From: Xufeng Liu [mailto:Xufeng_Liu@jabil.com]=20
Sent: Thursday, September 21, 2017 9:19 AM
To: Shah, Himanshu; shares@ndzh.com; Keyur Patel
Subject: RE: BGP yang data model question

=20

Sending to Keyur=E2=80=99s correct email address.

Thanks,

- Xufeng

=20

From: Xufeng Liu=20
Sent: Wednesday, September 20, 2017 9:22 PM
To: 'Shah, Himanshu' <hshah@ciena.com>; keyupate@cisco.com; =
shares@ndzh.com
Subject: RE: BGP yang data model question

=20

Hi Himanshu,

=20

These configuration attributes were existing in the draft =
https://tools.ietf.org/html/draft-zhdankin-idr-bgp-cfg-00, which was =
merged with https://tools.ietf.org/html/draft-shaikh-idr-bgp-model-01 =
later on. These attributes were taken out after the merge. I think that =
the reason was because of the OC philosophy of taking minimum commonly =
used feature set. It is good that you are bringing up this topic again, =
which can be further discussed.

=20

I believe that Keyur may have more to say on this.

=20

Thanks,

- Xufeng

=20

From: Shah, Himanshu [mailto:hshah@ciena.com]=20
Sent: Wednesday, September 20, 2017 9:05 PM
To: Xufeng Liu <Xufeng_Liu@jabil.com>; keyupate@cisco.com; =
shares@ndzh.com
Subject: Re: BGP yang data model question

=20

Now with right sue=E2=80=99s address..

=20

Thanks,

Himanshu

=20

From: "Shah, Himanshu" <hshah@ciena.com>
Date: Wednesday, September 20, 2017 at 8:59 PM
To: Xufeng Liu <xufeng_liu@jabil.com>, "keyupate@cisco.com" =
<keyupate@cisco.com>, "hares@ndzh.com" <hares@ndzh.com>
Subject: Re: BGP yang data model question

=20

Including Keyur and Sue Hares..

=20

Hi Keyur and Sue =E2=80=93

=20

Can you answer the question below?

It seems like there are bunch of configurable on per address family per =
neighbor,

But IDR yang data model does not support it.

Cisco and other routers do support these configurables (seems like they =
have their own yang data file).

=20

Do you know why such limitation in IDR yang data model?

=20

Thanks,

Himanshu

=20

From: "Shah, Himanshu" <hshah@ciena.com>
Date: Tuesday, September 19, 2017 at 6:30 PM
To: Xufeng Liu <xufeng_liu@jabil.com>
Subject: BGP yang data model

=20

Hi Xufeng =E2=80=93

=20

Why are below attributes not available at per neighbor per address =
family in BGP IETF yang data model?

Cisco supports them in their legacy BGP implementation.

=20

=20

=20

ipservices(config)#router bgp 100

ipservices(config-router)#address-family vpnv4 unicast

ipservices(config-router-af)#neighbor 1.1.1.1 ?

activate Enable the Address Family for this Neighbor

additional-paths Additional paths in the BGP table

advertise Advertise to this neighbor

allow-ebgp-vpn Allow VPN Routes to be exchanged over EBGP connection

allowas-in Accept as-path with my AS present in it

attribute-unchanged BGP attribute is propagated unchanged to this =
neighbor

distribute-list Filter updates to/from this neighbor

filter-list Establish BGP filters

maximum-prefix Maximum number of prefix accept from this peer

next-hop-self Disable the next hop calculation for this neighbor

prefix-list Filter updates to/from this neighbor

remove-private-AS Remove private AS number from outbound updates

route-map Apply route map to neighbor

route-reflector-client Configure a neighbor as Route Reflector client

route-server-client Configure a neighbor as Route Server client

send-community Send Community attribute to this neighbor

weight Set default weight for routes from this neighbor

=20

ipservices(config-router-af)#neighbor 1.1.1.1

=20

=20

Thanks,

Himanshu


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</o:shapelayout></xml><![endif]--></head><body bgcolor=3Dwhite =
lang=3DEN-US link=3D"#0563C1" vlink=3D"#954F72"><div =
class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;color:#1F497D'>Forwarding comments from =
Himanshu.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:11.0pt;color:#1F497D'>Sue =
Hares <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;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=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Shah, Himanshu [mailto:hshah@ciena.com] <br><b>Sent:</b> Monday, =
November 13, 2017 1:48 AM<br><b>To:</b> Keyur Patel; Susan Hares; =
'Xufeng Liu'<br><b>Subject:</b> Re: BGP yang data model =
question<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'font-family:"Trebuchet =
MS","sans-serif";color:#0432FF'>Forwarding as reminder as per =
today=E2=80=99s WG question.<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Trebuchet =
MS","sans-serif";color:#0432FF'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Trebuchet =
MS","sans-serif";color:#0432FF'>Please see at the bottom for the =
information.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Trebuchet =
MS","sans-serif";color:#0432FF'><o:p>&nbsp;</o:p></span></p><div><p =
class=3DMsoNormal><i><span =
style=3D'font-size:11.0pt;font-family:Consolas;color:#0432FF'>Thanks,<o:p=
></o:p></span></i></p></div><p class=3DMsoNormal><i><span =
style=3D'font-size:11.0pt;font-family:Consolas;color:#0432FF'>Himanshu</s=
pan></i><span style=3D'font-family:"Trebuchet =
MS","sans-serif";color:#0432FF'><o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-family:"Trebuchet =
MS","sans-serif";color:#0432FF'><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=3DMsoNormal><b><span style=3D'color:black'>From: =
</span></b><span style=3D'color:black'>Keyur Patel &lt;<a =
href=3D"mailto:keyur@arrcus.com">keyur@arrcus.com</a>&gt;<br><b>Date: =
</b>Friday, September 22, 2017 at 2:47 AM<br><b>To: </b>&quot;Shah, =
Himanshu&quot; &lt;<a =
href=3D"mailto:hshah@ciena.com">hshah@ciena.com</a>&gt;, Susan Hares =
&lt;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;, 'Xufeng =
Liu' &lt;<a =
href=3D"mailto:Xufeng_Liu@jabil.com">Xufeng_Liu@jabil.com</a>&gt;<br><b>S=
ubject: </b>Re: BGP yang data model =
question<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></p></div><p =
class=3DMsoNormal><span style=3D'font-size:11.0pt'>Hi =
Himanshu,</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></p><p =
class=3DMsoNormal><span style=3D'font-size:11.0pt'>As Sue mentioned we =
should have an updated model soon for you to review. Furthermore, some =
of the commands you listed MAY NOT be present in the base model as they =
belong in what we call as augmented model. The breakdown detail will be =
made available soon.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></p><p =
class=3DMsoNormal><span style=3D'font-size:11.0pt'>Hope all is well =
otherwise. </span><span =
style=3D'font-size:11.0pt;font-family:Wingdings'>J</span><o:p></o:p></p><=
p class=3DMsoNormal><span =
style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt'>Regards,</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt'>Keyur</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt'>&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=3DMsoNormal><b><span style=3D'color:black'>From: =
</span></b><span style=3D'color:black'>&quot;Shah, Himanshu&quot; &lt;<a =
href=3D"mailto:hshah@ciena.com">hshah@ciena.com</a>&gt;<br><b>Date: =
</b>Thursday, September 21, 2017 at 11:45 AM<br><b>To: </b>Susan Hares =
&lt;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;, 'Xufeng =
Liu' &lt;<a =
href=3D"mailto:Xufeng_Liu@jabil.com">Xufeng_Liu@jabil.com</a>&gt;, Keyur =
Patel &lt;<a =
href=3D"mailto:keyur@arrcus.com">keyur@arrcus.com</a>&gt;<br><b>Subject: =
</b>Re: BGP yang data model question</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span style=3D'font-family:"Times New =
Roman","serif"'>&nbsp;</span><o:p></o:p></p></div><p =
class=3DMsoNormal><i><span =
style=3D'font-family:Consolas;color:#0432FF'>Sue =
=E2=80=93</span></i><o:p></o:p></p><p class=3DMsoNormal><i><span =
style=3D'font-family:Consolas;color:#0432FF'>We are in the middle of =
implementation and would like to see this resolved sooner than =
later.</span></i><o:p></o:p></p><p class=3DMsoNormal><i><span =
style=3D'font-family:Consolas;color:#0432FF'>Any relief you can =
offer?</span></i><o:p></o:p></p><p class=3DMsoNormal><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><div><p class=3DMsoNormal><i><span =
style=3D'font-size:11.0pt;font-family:Consolas;color:#0432FF'>Thanks,</sp=
an></i><o:p></o:p></p></div><p class=3DMsoNormal><i><span =
style=3D'font-size:11.0pt;font-family:Consolas;color:#0432FF'>Himanshu</s=
pan></i><o:p></o:p></p><p class=3DMsoNormal><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal =
style=3D'margin-left:.5in'><b><span style=3D'color:black'>From: =
</span></b><span style=3D'color:black'>Susan Hares &lt;<a =
href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;<br><b>Date: =
</b>Thursday, September 21, 2017 at 2:36 PM<br><b>To: </b>'Xufeng Liu' =
&lt;<a =
href=3D"mailto:Xufeng_Liu@jabil.com">Xufeng_Liu@jabil.com</a>&gt;, =
&quot;Shah, Himanshu&quot; &lt;<a =
href=3D"mailto:hshah@ciena.com">hshah@ciena.com</a>&gt;, 'Keyur Patel' =
&lt;<a =
href=3D"mailto:keyur@arrcus.com">keyur@arrcus.com</a>&gt;<br><b>Subject: =
</b>RE: BGP yang data model question</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></p></div><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt;color:#1F497D'>Xufeng:</span><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt;color:#1F497D'>&nbsp;</span><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt;color:#1F497D'>We=E2=80=99re working on a =
revision to the BGP model.&nbsp; I=E2=80=99m mid-way through checking =
the model.&nbsp; Let me finish that so you can see it, and then =
I=E2=80=99ll send these questions over the weekend. =
</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt;color:#1F497D'>&nbsp;</span><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt;color:#1F497D'>Sue =
Hares</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt;color:#1F497D'>&nbsp;</span><o:p></o:p></p><div=
><div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt =
0in 0in 0in'><p class=3DMsoNormal style=3D'margin-left:.5in'><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Xufeng Liu [<a =
href=3D"mailto:Xufeng_Liu@jabil.com">mailto:Xufeng_Liu@jabil.com</a>] =
<br><b>Sent:</b> Thursday, September 21, 2017 9:19 AM<br><b>To:</b> =
Shah, Himanshu; <a href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>; =
Keyur Patel<br><b>Subject:</b> RE: BGP yang data model =
question</span><o:p></o:p></p></div></div><p class=3DMsoNormal =
style=3D'margin-left:.5in'>&nbsp;<o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:.5in'><span style=3D'font-size:11.0pt'>Sending to =
Keyur=E2=80=99s correct email address.</span><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt'>Thanks,</span><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt'>- Xufeng</span><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></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=3DMsoNormal =
style=3D'margin-left:.5in'><b><span =
style=3D'font-size:11.0pt'>From:</span></b><span =
style=3D'font-size:11.0pt'> Xufeng Liu <br><b>Sent:</b> Wednesday, =
September 20, 2017 9:22 PM<br><b>To:</b> 'Shah, Himanshu' &lt;<a =
href=3D"mailto:hshah@ciena.com">hshah@ciena.com</a>&gt;; <a =
href=3D"mailto:keyupate@cisco.com">keyupate@cisco.com</a>; <a =
href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a><br><b>Subject:</b> =
RE: BGP yang data model question</span><o:p></o:p></p></div></div><p =
class=3DMsoNormal style=3D'margin-left:.5in'>&nbsp;<o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt'>Hi Himanshu,</span><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt'>These configuration attributes were existing =
in the draft <a =
href=3D"https://tools.ietf.org/html/draft-zhdankin-idr-bgp-cfg-00">https:=
//tools.ietf.org/html/draft-zhdankin-idr-bgp-cfg-00</a>, which was =
merged with <a =
href=3D"https://tools.ietf.org/html/draft-shaikh-idr-bgp-model-01">https:=
//tools.ietf.org/html/draft-shaikh-idr-bgp-model-01</a> later on. These =
attributes were taken out after the merge. I think that the reason was =
because of the OC philosophy of taking minimum commonly used feature =
set. It is good that you are bringing up this topic again, which can be =
further discussed.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt'>I believe that Keyur may have more to say on =
this.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt'>Thanks,</span><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt'>- Xufeng</span><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></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=3DMsoNormal =
style=3D'margin-left:.5in'><b><span =
style=3D'font-size:11.0pt'>From:</span></b><span =
style=3D'font-size:11.0pt'> Shah, Himanshu [<a =
href=3D"mailto:hshah@ciena.com">mailto:hshah@ciena.com</a>] =
<br><b>Sent:</b> Wednesday, September 20, 2017 9:05 PM<br><b>To:</b> =
Xufeng Liu &lt;<a =
href=3D"mailto:Xufeng_Liu@jabil.com">Xufeng_Liu@jabil.com</a>&gt;; <a =
href=3D"mailto:keyupate@cisco.com">keyupate@cisco.com</a>; <a =
href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a><br><b>Subject:</b> =
Re: BGP yang data model question</span><o:p></o:p></p></div></div><p =
class=3DMsoNormal style=3D'margin-left:.5in'>&nbsp;<o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>Now with right =
sue=E2=80=99s address..</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><div><p class=3DMsoNormal style=3D'margin-left:.5in'><i><span =
style=3D'font-size:11.0pt;font-family:Consolas;color:#0432FF'>Thanks,</sp=
an></i><o:p></o:p></p></div><p class=3DMsoNormal =
style=3D'margin-left:.5in'><i><span =
style=3D'font-size:11.0pt;font-family:Consolas;color:#0432FF'>Himanshu</s=
pan></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal =
style=3D'margin-left:1.0in'><b><span style=3D'color:black'>From: =
</span></b><span style=3D'color:black'>&quot;Shah, Himanshu&quot; &lt;<a =
href=3D"mailto:hshah@ciena.com">hshah@ciena.com</a>&gt;<br><b>Date: =
</b>Wednesday, September 20, 2017 at 8:59 PM<br><b>To: </b>Xufeng Liu =
&lt;<a =
href=3D"mailto:xufeng_liu@jabil.com">xufeng_liu@jabil.com</a>&gt;, =
&quot;<a href=3D"mailto:keyupate@cisco.com">keyupate@cisco.com</a>&quot; =
&lt;<a href=3D"mailto:keyupate@cisco.com">keyupate@cisco.com</a>&gt;, =
&quot;<a href=3D"mailto:hares@ndzh.com">hares@ndzh.com</a>&quot; &lt;<a =
href=3D"mailto:hares@ndzh.com">hares@ndzh.com</a>&gt;<br><b>Subject: =
</b>Re: BGP yang data model question</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal style=3D'margin-left:1.0in'><span =
style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></p></div><p =
class=3DMsoNormal style=3D'margin-left:1.0in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>Including Keyur and Sue =
Hares..</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.0in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><p class=3DMsoNormal style=3D'margin-left:1.0in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>Hi Keyur and Sue =
=E2=80=93</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.0in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><p class=3DMsoNormal style=3D'margin-left:1.0in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>Can you answer the question =
below?</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.0in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>It seems like there are =
bunch of configurable on per address family per =
neighbor,</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.0in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>But IDR yang data model =
does not support it.</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.0in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>Cisco and other routers do =
support these configurables (seems like they have their own yang data =
file).</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.0in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><p class=3DMsoNormal style=3D'margin-left:1.0in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>Do you know why such =
limitation in IDR yang data model?</span></i><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:1.0in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><div><p class=3DMsoNormal style=3D'margin-left:1.0in'><i><span =
style=3D'font-size:11.0pt;font-family:Consolas;color:#0432FF'>Thanks,</sp=
an></i><o:p></o:p></p></div><p class=3DMsoNormal =
style=3D'margin-left:1.0in'><i><span =
style=3D'font-size:11.0pt;font-family:Consolas;color:#0432FF'>Himanshu</s=
pan></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.0in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><b><span style=3D'color:black'>From: =
</span></b><span style=3D'color:black'>&quot;Shah, Himanshu&quot; &lt;<a =
href=3D"mailto:hshah@ciena.com">hshah@ciena.com</a>&gt;<br><b>Date: =
</b>Tuesday, September 19, 2017 at 6:30 PM<br><b>To: </b>Xufeng Liu =
&lt;<a =
href=3D"mailto:xufeng_liu@jabil.com">xufeng_liu@jabil.com</a>&gt;<br><b>S=
ubject: </b>BGP yang data model</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal style=3D'margin-left:1.5in'><span =
style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></p></div><p =
class=3DMsoNormal style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>Hi Xufeng =
=E2=80=93</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><p class=3DMsoNormal style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>Why are below attributes =
not available at per neighbor per address family in BGP IETF yang data =
model?</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>Cisco supports them in =
their legacy BGP implementation.</span></i><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><p class=3DMsoNormal style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><p class=3DMsoNormal style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><p class=3DMsoNormal style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>ipservices(config)#router =
bgp 100</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>ipservices(config-router)#ad=
dress-family vpnv4 unicast</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>ipservices(config-router-af)=
#neighbor 1.1.1.1 ?</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>activate Enable the Address Family for this =
Neighbor</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>additional-paths Additional paths in the BGP =
table</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>advertise Advertise to this =
neighbor</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>allow-ebgp-vpn Allow VPN Routes to be exchanged over EBGP =
connection</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>allowas-in Accept as-path with my AS present in =
it</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>attribute-unchanged BGP attribute is propagated unchanged to =
this neighbor</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>distribute-list Filter updates to/from this =
neighbor</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>filter-list Establish BGP filters</span></i><o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>maximum-prefix Maximum number of prefix accept from this =
peer</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>next-hop-self Disable the next hop calculation for this =
neighbor</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>prefix-list Filter updates to/from this =
neighbor</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>remove-private-AS Remove private AS number from outbound =
updates</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>route-map Apply route map to =
neighbor</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>route-reflector-client Configure a neighbor as Route =
Reflector client</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>route-server-client Configure a neighbor as Route Server =
client</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>send-community Send Community attribute to this =
neighbor</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF;background:yellow;mso-highlig=
ht:yellow'>weight Set default weight for routes from this =
neighbor</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><p class=3DMsoNormal style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>ipservices(config-router-af)=
#neighbor 1.1.1.1</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><p class=3DMsoNormal style=3D'margin-left:1.5in'><i><span =
style=3D'font-family:Consolas;color:#0432FF'>&nbsp;</span></i><o:p></o:p>=
</p><p class=3DMsoNormal style=3D'margin-left:1.5in'><i><span =
style=3D'font-size:11.0pt;font-family:Consolas;color:#0432FF'>Thanks,</sp=
an></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:1.5in'><i><span =
style=3D'font-size:11.0pt;font-family:Consolas;color:#0432FF'>Himanshu</s=
pan></i><o:p></o:p></p></div></div></div></body></html>
------=_NextPart_000_01A4_01D35CA6.E22FB420--


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From: Rob Shakir <rjs@rob.sh>
Date: Wed, 15 Nov 2017 06:40:48 +0000
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To: Job Snijders <job@ntt.net>
Cc: John Scudder <jgs@juniper.net>, paul@jakma.org, "idr@ietf.org List" <idr@ietf.org>
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Subject: Re: [Idr] WGLC for draft-ietf-idr-mrai-dep-03
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Hi Job,

I don't recall the reason that this didn't go forward - so unfortunately
can't comment on that.

However, I wonder how many implementors of BGP are really just looking at
4271 these days and using these recommendations. It has been BCP a long
time that withdrawls should not be subject to MRAI in an implementation,
and tuneable MRAIs have been/are configurable in most implementations.

Do you think that getting out the IETF chisels and carving a new RFC is
needed to make this more common? Do you see implementations that don't do
what was suggested in this document or at least provide you knobs to
achieve this?

r.

On Tue, 24 Oct 2017 at 05:57 Job Snijders <job@ntt.net> wrote:

> Dear all,
>
> Reviving an old thread.
>
> I noticed support from Robert Raszuk, Jeff Tantsura, Bruno Decraene,
> andd Rob Shakir to deprecate the RFC 4271 default MRAI values. Jeff Haas
> commented that he read the draft.
>
> Perhaps it is time to conclude this WGLC? Or was the work abandoned for
> some reason not immediately apparent from the mailing list archive?
>
> The draft expired, but the latest version is here:
> https://tools.ietf.org/html/draft-ietf-idr-mrai-dep-04
>
> Kind regards,
>
> Job
>
>
> On Tue, Mar 29, 2011 at 08:44:57AM +0000, John Scudder wrote:
> > Folks,
> >
> > We have been remiss in not WGLC'ing this draft earlier, it has been
> stable for some time and is exceptionally short (about a half-page plus
> boilerplate):
> >
> > http://www.ietf.org/internet-drafts/draft-ietf-idr-mrai-dep-03.txt
> >
> > Please send any comments on the draft to the list by April 12, 2011.
> >
> > Thanks,
> >
> > --John
> > _______________________________________________
> > Idr mailing list
> > Idr@ietf.org
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<div dir=3D"ltr">Hi Job,<div><br></div><div>I don&#39;t recall the reason t=
hat this didn&#39;t go forward - so unfortunately can&#39;t comment on that=
.</div><div><br></div><div>However, I wonder how many implementors of BGP a=
re really just looking at 4271 these days and using these recommendations. =
It has been BCP a long time that withdrawls should not be subject to MRAI i=
n an implementation, and tuneable MRAIs have been/are configurable in most =
implementations.</div><div><br></div><div>Do you think that getting out the=
 IETF chisels and carving a new RFC is needed to make this more common? Do =
you see implementations that don&#39;t do what was suggested in this docume=
nt or at least provide you knobs to achieve this?</div><div><br></div><div>=
r.</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr">On Tue, 24 Oc=
t 2017 at 05:57 Job Snijders &lt;<a href=3D"mailto:job@ntt.net">job@ntt.net=
</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:=
0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear all,<br>
<br>
Reviving an old thread.<br>
<br>
I noticed support from Robert Raszuk, Jeff Tantsura, Bruno Decraene,<br>
andd Rob Shakir to deprecate the RFC 4271 default MRAI values. Jeff Haas<br=
>
commented that he read the draft.<br>
<br>
Perhaps it is time to conclude this WGLC? Or was the work abandoned for<br>
some reason not immediately apparent from the mailing list archive?<br>
<br>
The draft expired, but the latest version is here: <a href=3D"https://tools=
.ietf.org/html/draft-ietf-idr-mrai-dep-04" rel=3D"noreferrer" target=3D"_bl=
ank">https://tools.ietf.org/html/draft-ietf-idr-mrai-dep-04</a><br>
<br>
Kind regards,<br>
<br>
Job<br>
<br>
<br>
On Tue, Mar 29, 2011 at 08:44:57AM +0000, John Scudder wrote:<br>
&gt; Folks,<br>
&gt;<br>
&gt; We have been remiss in not WGLC&#39;ing this draft earlier, it has bee=
n stable for some time and is exceptionally short (about a half-page plus b=
oilerplate):<br>
&gt;<br>
&gt; <a href=3D"http://www.ietf.org/internet-drafts/draft-ietf-idr-mrai-dep=
-03.txt" rel=3D"noreferrer" target=3D"_blank">http://www.ietf.org/internet-=
drafts/draft-ietf-idr-mrai-dep-03.txt</a><br>
&gt;<br>
&gt; Please send any comments on the draft to the list by April 12, 2011.<b=
r>
&gt;<br>
&gt; Thanks,<br>
&gt;<br>
&gt; --John<br>
&gt; _______________________________________________<br>
&gt; Idr mailing list<br>
&gt; <a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferre=
r" target=3D"_blank">https://www.ietf.org/mailman/listinfo/idr</a><br>
<br>
_______________________________________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/listinfo/idr</a><br>
</blockquote></div>

--94eb2c12f2365309eb055dffc957--


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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Susan Hares wrote:
> This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages
> (11/12 to 11/26).  Please note this draft has at least 2
> implementations.    Please comment on whether you feel this draft is
> ready for publication.  

looks good.  Please publish.

Nick


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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Susan Hares wrote:
> This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages
> (11/12 to 11/26).  Please note this draft has at least 2
> implementations.

The implementation report is available here:
https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-extended-implementations

> Please comment on whether you feel this draft is ready for publication.

I support publication.

Kind regards,

Job


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Hi,

I am concerned with the lack of clear description of what router which
supports extended msg should do
when on one side he receives an attribute bigger then 4K and not of all
it's peers can handle it.

IMO the below statement is true but a bit too vague:

"Therefore putting an attribute which can not be decomposed to 4096 octets
or less in an

   Extended Message is a likely path to routing failure.
=E2=80=8B"


=E2=80=8BAnd the worst part is that the BGP speaker which in fact generated
such attribute =E2=80=8B

be it on purpose or by error will not find out that its propagation has

failed one or N hops away.


=E2=80=8BToday when one is trying to inject msg over 4K (say due to a bug) =
it
will fail locally,

generate syslog etc ... =E2=80=8B


Any comments from authors and WG on that ?


Thx,

R.





=E2=80=8B


On Sun, Nov 12, 2017 at 11:47 PM, Susan Hares <shares@ndzh.com> wrote:

> This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages
> (11/12 to 11/26).  Please note this draft has at least 2 implementations.
>    Please comment on whether you feel this draft is ready for
> publication.
>
>
>
> Susan Hares
>
>
>
> PS =E2=80=93 the request for this WG LC is at:
>
> https://www.ietf.org/mail-archive/web/idr/current/msg18801.html
>
>
>
>
>
>
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--94eb2c0756102ce3c6055e05ddd2
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small"><fo=
nt face=3D"arial, helvetica, sans-serif">Hi,</font></div><div class=3D"gmai=
l_default" style=3D"font-size:small"><font face=3D"arial, helvetica, sans-s=
erif"><br></font></div><div class=3D"gmail_default" style=3D"font-size:smal=
l"><font face=3D"arial, helvetica, sans-serif">I am concerned with the lack=
 of clear description of what router which supports extended msg should do=
=C2=A0</font></div><div class=3D"gmail_default" style=3D"font-size:small"><=
font face=3D"arial, helvetica, sans-serif">when on one side he receives an =
attribute bigger then 4K and not of all it&#39;s peers can handle it.</font=
></div><div class=3D"gmail_default" style=3D"font-size:small"><font face=3D=
"arial, helvetica, sans-serif"><br></font></div><div class=3D"gmail_default=
" style=3D"font-size:small"><font face=3D"arial, helvetica, sans-serif">IMO=
 the below statement is true but a bit too vague:</font></div><div class=3D=
"gmail_default" style=3D"font-size:small"><font face=3D"arial, helvetica, s=
ans-serif"><br></font></div><div class=3D"gmail_default" style=3D"font-size=
:small"><font face=3D"arial, helvetica, sans-serif">&quot;<span style=3D"co=
lor:rgb(0,0,0);font-size:13.3333px">Therefore putting=C2=A0</span><span sty=
le=3D"color:rgb(0,0,0);font-size:13.3333px">an attribute which can not be d=
ecomposed to 4096 octets or less in an</span></font></div><pre class=3D"gma=
il-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;c=
olor:rgb(0,0,0)"><font face=3D"arial, helvetica, sans-serif">   Extended Me=
ssage is a likely path to routing failure.<div class=3D"gmail_default" styl=
e=3D"font-size:small;display:inline">=E2=80=8B&quot;</div></font></pre><pre=
 class=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin=
-bottom:0px;color:rgb(0,0,0)"><font face=3D"arial, helvetica, sans-serif"><=
br></font></pre><pre class=3D"gmail-newpage" style=3D"font-size:13.3333px;m=
argin-top:0px;margin-bottom:0px;color:rgb(0,0,0)"><font face=3D"arial, helv=
etica, sans-serif"><div class=3D"gmail_default" style=3D"font-size:small;di=
splay:inline">=E2=80=8BAnd the worst part is that the BGP speaker which in =
fact generated </div>such attribute =E2=80=8B</font></pre><pre class=3D"gma=
il-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;c=
olor:rgb(0,0,0)"><font face=3D"arial, helvetica, sans-serif">be it on purpo=
se or by error will not find out that its propagation has </font></pre><pre=
 class=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin=
-bottom:0px;color:rgb(0,0,0)"><font face=3D"arial, helvetica, sans-serif">f=
ailed one or N hops away. </font></pre><pre class=3D"gmail-newpage" style=
=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0)">=
<font face=3D"arial, helvetica, sans-serif"><br></font></pre><pre class=3D"=
gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0p=
x;color:rgb(0,0,0)"><div class=3D"gmail_default" style=3D"font-size:small;d=
isplay:inline"><font face=3D"arial, helvetica, sans-serif">=E2=80=8BToday w=
hen one is trying to inject msg over 4K (say due to a bug) it will fail loc=
ally, </font></div></pre><pre class=3D"gmail-newpage" style=3D"font-size:13=
.3333px;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0)"><div class=3D"gm=
ail_default" style=3D"font-size:small;display:inline"><font face=3D"arial, =
helvetica, sans-serif">generate syslog etc ... =E2=80=8B</font></div><br></=
pre><pre class=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-top:0p=
x;margin-bottom:0px;color:rgb(0,0,0)"><div class=3D"gmail_default" style=3D=
"font-size:small;display:inline"><font face=3D"arial, helvetica, sans-serif=
"><br></font></div></pre><pre class=3D"gmail-newpage" style=3D"font-size:13=
.3333px;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0)"><div class=3D"gm=
ail_default" style=3D"font-size:small;display:inline"><font face=3D"arial, =
helvetica, sans-serif">Any comments from authors and WG on that ?</font></d=
iv></pre><pre class=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-t=
op:0px;margin-bottom:0px;color:rgb(0,0,0)"><div class=3D"gmail_default" sty=
le=3D"font-size:small;display:inline"><font face=3D"arial, helvetica, sans-=
serif"><br></font></div></pre><pre class=3D"gmail-newpage" style=3D"font-si=
ze:13.3333px;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0)"><div class=
=3D"gmail_default" style=3D"font-size:small;display:inline"><font face=3D"a=
rial, helvetica, sans-serif">Thx,</font></div></pre><pre class=3D"gmail-new=
page" style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;color:r=
gb(0,0,0)"><div class=3D"gmail_default" style=3D"font-size:small;display:in=
line"><font face=3D"arial, helvetica, sans-serif">R.</font></div></pre><pre=
 class=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin=
-bottom:0px;color:rgb(0,0,0)"><div class=3D"gmail_default" style=3D"font-si=
ze:small;display:inline"><font face=3D"arial, helvetica, sans-serif"><br></=
font></div></pre><pre class=3D"gmail-newpage" style=3D"font-size:13.3333px;=
margin-top:0px;margin-bottom:0px;color:rgb(0,0,0)"><br></pre><pre class=3D"=
gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0p=
x;color:rgb(0,0,0)"><br></pre><pre class=3D"gmail-newpage" style=3D"font-si=
ze:13.3333px;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0)"><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small;display:inline"><br></div></pre><pre class=3D"gmail-newpage" style=
=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0)">=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small;display:inline">=E2=80=8B</div></pre></div><div class=3D"=
gmail_extra"><br><div class=3D"gmail_quote">On Sun, Nov 12, 2017 at 11:47 P=
M, Susan Hares <span dir=3D"ltr">&lt;<a href=3D"mailto:shares@ndzh.com" tar=
get=3D"_blank">shares@ndzh.com</a>&gt;</span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex"><div lang=3D"EN-US" link=3D"blue" vlink=3D"purple"><div class=
=3D"m_-6048504162474103360WordSection1"><p class=3D"MsoNormal">This begins =
a 2 week WG LC for draft-ietf-idr-bgp-extended-<wbr>messages (11/12 to 11/2=
6).=C2=A0 Please note this draft has at least 2 implementations. =C2=A0=C2=
=A0=C2=A0Please comment on whether you feel this draft is ready for publica=
tion.=C2=A0=C2=A0 <span class=3D"HOEnZb"><font color=3D"#888888"><u></u><u>=
</u></font></span></p><span class=3D"HOEnZb"><font color=3D"#888888"><p cla=
ss=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">Susan Hares=
 <u></u><u></u></p></font></span><p class=3D"MsoNormal"><u></u>=C2=A0<u></u=
></p><p class=3D"MsoNormal">PS =E2=80=93 the request for this WG LC is at:<=
u></u><u></u></p><p class=3D"MsoNormal"><a href=3D"https://www.ietf.org/mai=
l-archive/web/idr/current/msg18801.html" target=3D"_blank">https://www.ietf=
.org/mail-<wbr>archive/web/idr/current/<wbr>msg18801.html</a><u></u><u></u>=
</p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal"><=
u></u>=C2=A0<u></u></p><pre><span style=3D"color:black"> <u></u><u></u></sp=
an></pre><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNorm=
al"><u></u>=C2=A0<u></u></p></div></div><br>______________________________<=
wbr>_________________<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" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

--94eb2c0756102ce3c6055e05ddd2--


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From: heasley <heas@shrubbery.net>
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
Cc: Robert Raszuk <robert@raszuk.net>, Susan Hares <shares@ndzh.com>, idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Wed, Nov 15, 2017 at 07:24:12PM +0000, Jakob Heitz (jheitz):
> Good point Robert. How about adding something like:
> 
> Certain features used by some BGP speakers require the use of extended messages.
> Such features are indicated with a BGP capability.
> If a BGP speaker sends an extended message to a second speaker, but that message
> does not use a feature that requires extended messages, then the contents of that
> message may not be distributed correctly throughout the BGP space to which that content is targeted.
> This is because while the immediate neighbor speaker may support extended messages, every
> BGP speaker within the said BGP space might not support extended messages.
> 
> For example, a certain BGP feature requires the use of a large BGP attribute.
> This feature is not supported by every BGP speaker within a BGP space.
> BGP updates with the large attribute removed might be acceptable to speakers
> that do not support the feature, even though functionality is reduced without the feature.
> If such a BGP update is longer than 4096 octets when the
> large attribute is removed, then it cannot be distributed to those speakers.
> 
> To prevent the failures outlined above, a BGP speaker SHOULD not generate a message
> that is longer than 4096 octets if a feature that requires extended messages is not used.
> Furthermore, a BGP speaker SHOULD not generate a message that cannot be reduced to
> 4096 octets or less by another speaker that needs to remove the feature that requires
> extended messages.

A feature that requires large attributes would also require extended messages
and if the capabilities do not reflect both, I expect the open would fail and
the capability would be excluded subsequently.  Are there features requiring
extended communities that are not themselves represented by a capability?
Implying that those attributes would naturally be removed, leaving the normal
reduction of NLRI to fit within the former msg limit?

not that some manner of feedback is not necessary.  a route could contain a
mix of community attributes leading it to exceed the former msg limit.  And
4271 offers no direction for that case either.  I expect the update to be
discarded and a trap and syslog is generated, but I do not know.

> Thanks,
> Jakob
> 
> From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Robert Raszuk
> Sent: Wednesday, November 15, 2017 5:56 AM
> To: Susan Hares <shares@ndzh.com>
> Cc: idr wg <idr@ietf.org>; idr-ads@ietf.org; idr-chairs@ietf.org
> Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
> 
> Hi,
> 
> I am concerned with the lack of clear description of what router which supports extended msg should do
> when on one side he receives an attribute bigger then 4K and not of all it's peers can handle it.
> 
> IMO the below statement is true but a bit too vague:
> 
> "Therefore putting an attribute which can not be decomposed to 4096 octets or less in an
> 
>    Extended Message is a likely path to routing failure.
> 
> ​"
> 
> 
> 
> ​And the worst part is that the BGP speaker which in fact generated
> 
> such attribute ​
> 
> be it on purpose or by error will not find out that its propagation has
> 
> failed one or N hops away.
> 
> 
> 
> ​Today when one is trying to inject msg over 4K (say due to a bug) it will fail locally,
> 
> generate syslog etc ... ​
> 
> 
> 
> 
> 
> Any comments from authors and WG on that ?
> 
> 
> 
> Thx,
> 
> R.
> 
> 
> 
> 
> 
> 
> 
> 
> 
> ​
> 
> On Sun, Nov 12, 2017 at 11:47 PM, Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>> wrote:
> This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages (11/12 to 11/26).  Please note this draft has at least 2 implementations.    Please comment on whether you feel this draft is ready for publication.
> 
> Susan Hares
> 
> PS – the request for this WG LC is at:
> https://www.ietf.org/mail-archive/web/idr/current/msg18801.html
> 
> 
> 
> 
> 
> 
> 
> _______________________________________________
> Idr mailing list
> Idr@ietf.org<mailto:Idr@ietf.org>
> https://www.ietf.org/mailman/listinfo/idr
> 

> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr


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From: <bruno.decraene@orange.com>
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "bruno.decraene@orange.com" <bruno.decraene@orange.com>, "Jakob Heitz (jheitz)" <jheitz@cisco.com>, Robert Raszuk <robert@raszuk.net>, Susan Hares <shares@ndzh.com>
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Date: Thu, 16 Nov 2017 05:44:36 +0000
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
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Thread-Topic: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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> The reason I went further than that is that with extended messages,
> it's not just about a speaker and its neighbor anymore, it's about a
> whole BGP space.

< bitchiness, it's been two weeks in s'pore >

the original extended messages draft was restricted to update messages
for the purpose of bgpsec.  and bgpsec required it.  and when bgpsec
hits a neighbor which does not speak bgpsec, it strips all the crypto
bloat and then the update fits in 4095 as it is the same as today.  this
was not an accident.

but the idr wg, it its tradition of embellishment, asked for other
messages to be extended (some suggested open be extended too, a real
rat-hole).  well, bright folk, you want it, you figure it out.  send
text.  and small simple text, < 500 words.  if you can not keep it
simple, that should tell you something.

rndy


From nobody Wed Nov 15 22:49:36 2017
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Subject: [Idr] I-D Action: draft-ietf-idr-flow-spec-v6-09.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 Inter-Domain Routing WG of the IETF.

        Title           : Dissemination of Flow Specification Rules for IPv6
        Authors         : Danny McPherson
                          Robert Raszuk
                          Burjiz Pithawala
                          Andy Karch
                          Susan Hares
	Filename        : draft-ietf-idr-flow-spec-v6-09.txt
	Pages           : 10
	Date            : 2017-11-15

Abstract:
   Dissemination of Flow Specification Rules [RFC5575] provides a
   protocol extension for propagation of traffic flow information for
   the purpose of rate limiting or filtering.  The [RFC5575] specifies
   those extensions for IPv4 protocol data packets.

   This specification extends the current [RFC5575] and defines changes
   to the original document in order to make it also usable and
   applicable to IPv6 data packets.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-flow-spec-v6/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-flow-spec-v6-09
https://datatracker.ietf.org/doc/html/draft-ietf-idr-flow-spec-v6-09

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-flow-spec-v6-09


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: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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WG:
[WG chair hat on] 

+1 - to randy request to send text.  We've been through this draft before.
Positive proposals that are brief will really help move this draft forward.

[WG chair hat askew] -- it's been 7 days in Singapore with great network
connectivity..  

Sue 

-----Original Message-----
From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Randy Bush
Sent: Thursday, November 16, 2017 1:33 AM
To: Jakob Heitz
Cc: Interminable Discussion Room
Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages
(11/12 to 11/26)

> The reason I went further than that is that with extended messages, 
> it's not just about a speaker and its neighbor anymore, it's about a 
> whole BGP space.

< bitchiness, it's been two weeks in s'pore >

the original extended messages draft was restricted to update messages for
the purpose of bgpsec.  and bgpsec required it.  and when bgpsec hits a
neighbor which does not speak bgpsec, it strips all the crypto bloat and
then the update fits in 4095 as it is the same as today.  this was not an
accident.

but the idr wg, it its tradition of embellishment, asked for other messages
to be extended (some suggested open be extended too, a real rat-hole).
well, bright folk, you want it, you figure it out.  send text.  and small
simple text, < 500 words.  if you can not keep it simple, that should tell
you something.

rndy

_______________________________________________
Idr mailing list
Idr@ietf.org
https://www.ietf.org/mailman/listinfo/idr


From nobody Wed Nov 15 23:03:17 2017
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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> Note that Network-Byte Order is the standard for IETF documents and at
> least I don=A2t think it needs to be specified in every document with
> packet encodings. See section 3.1 of
> https://www.ietf.org/rfc/rfc2360.txt

yay!  i can remove text.  ty

randy


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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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--94eb2c1cb82c9823e5055e15012c
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Indeed this is the problem.

My main concern is not about use by new attributes/apps which may not fit
4k msg and which can define what to do when mismatch occurs.

My concern is on the lack of clear definition on what a BGP speaker should
do 5 hops away from the sender when it receives say Extended Community or
Large Community attributes of the size of 6k ? Maybe due to a bug or attack
or xyz ...

Sometimes it is save to drop just such attribute sometimes it is not even
considering currently shipping attributes. And regardless if the attribute
is dropped or entire update is dropped the real sender will have no clue
about it.

As far as proposing text .. one practical option I see which will allow to
introduce extended msg without risk of breaking current networks would be
to define a new BGP message type: "BGP LARGE UPDATE MSG".

You still have the same problem there of handling support between new and
old peers, but at least you are not potentially  breaking what works today
nor are introducing new attack vectors to existing deployments.

//R.




On Nov 16, 2017 14:09, "Jakob Heitz (jheitz)" <jheitz@cisco.com> wrote:

> The reason I went further than that is that with extended messages, it's
> not just about a speaker and its neighbor anymore, it's about a whole BGP
> space.
>
>
>
> We should probably go further still and say:
>
>
>
> BGP speakers that are not using features that specifically require
> extended messages MUST NOT use extended messages.
>
>
>
> Thanks,
>
> Jakob
>
>
>
> *From:* bruno.decraene@orange.com [mailto:bruno.decraene@orange.com]
> *Sent:* Wednesday, November 15, 2017 8:03 PM
> *To:* Jakob Heitz (jheitz) <jheitz@cisco.com>; Robert Raszuk <
> robert@raszuk.net>; Susan Hares <shares@ndzh.com>
> *Cc:* idr wg <idr@ietf.org>; idr-ads@ietf.org; idr-chairs@ietf.org
> *Subject:* RE: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messag=
es
> (11/12 to 11/26)
>
>
>
> I was thinking of something more along the lines of
> https://tools.ietf.org/html/rfc7606#section-8 e.g.
>
>
>
> =C2=A7 Guidance for Authors of BGP Specifications
>
>
>
>    A document that specifies a new BGP attribute that may not fit in a
> 4096-octet limit MUST provide specifics
>
>    regarding how to advertise a BGP message larger than 4096 octets to a =
speaker that does not support Extended Messages. In particular whether the =
removal of the attribute is allowed/advertised or not. Trade-offs are likel=
y similar to the ones discussed in RFC 7606. In particular, if the
>
>    attribute in question has or may have an effect on route selection or
>
>    installation, the presumption is that removing it is unsafe unless
>
>    careful analysis proves otherwise.
>
>
>
> --
>
> =E2=80=9CMulti-octet fields MUST be in network byte order.=E2=80=9D
>
> Possibly a reference could be added, specifying this =E2=80=9Cnetwork byt=
e order=E2=80=9D. (especially for a MUST)
>
>
>
> Thanks,
>
> Regards,
>
> --Bruno
>
>
>
> *From:* Idr [mailto:idr-bounces@ietf.org <idr-bounces@ietf.org>] *On
> Behalf Of *Jakob Heitz (jheitz)
> *Sent:* Thursday, November 16, 2017 3:24 AM
> *To:* Robert Raszuk; Susan Hares
> *Cc:* idr wg; idr-ads@ietf.org; idr-chairs@ietf.org
> *Subject:* Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messag=
es
> (11/12 to 11/26)
>
>
>
> Good point Robert. How about adding something like:
>
>
>
> Certain features used by some BGP speakers require the use of extended
> messages.
>
> Such features are indicated with a BGP capability.
>
> If a BGP speaker sends an extended message to a second speaker, but that
> message
>
> does not use a feature that requires extended messages, then the contents
> of that
>
> message may not be distributed correctly throughout the BGP space to whic=
h
> that content is targeted.
>
> This is because while the immediate neighbor speaker may support extended
> messages, every
>
> BGP speaker within the said BGP space might not support extended messages=
.
>
>
>
> For example, a certain BGP feature requires the use of a large BGP
> attribute.
>
> This feature is not supported by every BGP speaker within a BGP space.
>
> BGP updates with the large attribute removed might be acceptable to
> speakers
>
> that do not support the feature, even though functionality is reduced
> without the feature.
>
> If such a BGP update is longer than 4096 octets when the
>
> large attribute is removed, then it cannot be distributed to those
> speakers.
>
>
>
> To prevent the failures outlined above, a BGP speaker SHOULD not generate
> a message
>
> that is longer than 4096 octets if a feature that requires extended
> messages is not used.
>
> Furthermore, a BGP speaker SHOULD not generate a message that cannot be
> reduced to
>
> 4096 octets or less by another speaker that needs to remove the feature
> that requires
>
> extended messages.
>
>
>
> Thanks,
>
> Jakob
>
>
>
> *From:* Idr [mailto:idr-bounces@ietf.org <idr-bounces@ietf.org>] *On
> Behalf Of *Robert Raszuk
> *Sent:* Wednesday, November 15, 2017 5:56 AM
> *To:* Susan Hares <shares@ndzh.com>
> *Cc:* idr wg <idr@ietf.org>; idr-ads@ietf.org; idr-chairs@ietf.org
> *Subject:* Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messag=
es
> (11/12 to 11/26)
>
>
>
> Hi,
>
>
>
> I am concerned with the lack of clear description of what router which
> supports extended msg should do
>
> when on one side he receives an attribute bigger then 4K and not of all
> it's peers can handle it.
>
>
>
> IMO the below statement is true but a bit too vague:
>
>
>
> "Therefore putting an attribute which can not be decomposed to 4096
> octets or less in an
>
>    Extended Message is a likely path to routing failure.
>
> =E2=80=8B"
>
>
>
> =E2=80=8BAnd the worst part is that the BGP speaker which in fact generat=
ed
>
> such attribute =E2=80=8B
>
> be it on purpose or by error will not find out that its propagation has
>
> failed one or N hops away.
>
>
>
> =E2=80=8BToday when one is trying to inject msg over 4K (say due to a bug=
) it will fail locally,
>
> generate syslog etc ... =E2=80=8B
>
>
>
>
>
> Any comments from authors and WG on that ?
>
>
>
> Thx,
>
> R.
>
>
>
>
>
>
>
>
>
> =E2=80=8B
>
>
>
> On Sun, Nov 12, 2017 at 11:47 PM, Susan Hares <shares@ndzh.com> wrote:
>
> This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages
> (11/12 to 11/26).  Please note this draft has at least 2 implementations.
>    Please comment on whether you feel this draft is ready for
> publication.
>
>
>
> Susan Hares
>
>
>
> PS =E2=80=93 the request for this WG LC is at:
>
> https://www.ietf.org/mail-archive/web/idr/current/msg18801.html
>
>
>
>
>
>
>
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>
> _________________________________________________________________________=
________________________________________________
>
>
>
> Ce message et ses pieces jointes peuvent contenir des informations confid=
entielles ou privilegiees et ne doivent donc
>
> pas etre diffuses, exploites ou copies sans autorisation. Si vous avez re=
cu 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 o=
u falsifie. Merci.
>
>
>
> This message and its attachments may contain confidential or privileged i=
nformation 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 de=
lete this message and its attachments.
>
> As emails may be altered, Orange is not liable for messages that have bee=
n modified, changed or falsified.
>
> Thank you.
>
>

--94eb2c1cb82c9823e5055e15012c
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"auto">Indeed this is the problem.<div dir=3D"auto"><br></div><d=
iv dir=3D"auto">My main concern is not about use by new attributes/apps whi=
ch may not fit 4k msg and which can define what to do when mismatch occurs.=
</div><div dir=3D"auto"><br></div><div dir=3D"auto">My concern is on the la=
ck of clear definition on what a BGP speaker should do 5 hops away from the=
 sender when it receives say Extended Community or Large Community attribut=
es of the size of 6k ? Maybe due to a bug or attack or xyz ...</div><div di=
r=3D"auto"><br></div><div dir=3D"auto">Sometimes it is save to drop just su=
ch attribute sometimes it is not even considering currently shipping attrib=
utes. And regardless if the attribute is dropped or entire update is droppe=
d the real sender will have no clue about it.</div><div dir=3D"auto"><br></=
div><div dir=3D"auto">As far as proposing text .. one practical option I se=
e which will allow to introduce extended msg without risk of breaking curre=
nt networks would be to define a new BGP message type: &quot;BGP LARGE UPDA=
TE MSG&quot;.=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">You =
still have the same problem there of handling support between new and old p=
eers, but at least you are not potentially=C2=A0 breaking what works today =
nor are introducing new attack vectors to existing deployments.</div><div d=
ir=3D"auto"><br></div><div dir=3D"auto">//R.</div><div dir=3D"auto"><br></d=
iv><div dir=3D"auto"><br></div><div dir=3D"auto"><br></div></div><div class=
=3D"gmail_extra"><br><div class=3D"gmail_quote">On Nov 16, 2017 14:09, &quo=
t;Jakob Heitz (jheitz)&quot; &lt;<a href=3D"mailto:jheitz@cisco.com">jheitz=
@cisco.com</a>&gt; wrote:<br type=3D"attribution"><blockquote class=3D"gmai=
l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left=
:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_7065670119261598066WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">The reason I went further than that is=
 that with extended messages, it&#39;s not just about a speaker and its nei=
ghbor anymore, it&#39;s about a whole BGP space.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">We should probably go further still an=
d say:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">BGP speakers that are not using featur=
es that specifically require extended messages MUST NOT use extended messag=
es.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Thanks,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Jakob<u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0"><u></u>=C2=A0<u></u></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"> <a href=3D"mailto:bruno.decrae=
ne@orange.com" target=3D"_blank">bruno.decraene@orange.com</a> [mailto:<a h=
ref=3D"mailto:bruno.decraene@orange.com" target=3D"_blank">bruno.decraene@o=
range.<wbr>com</a>]
<br>
<b>Sent:</b> Wednesday, November 15, 2017 8:03 PM<br>
<b>To:</b> Jakob Heitz (jheitz) &lt;<a href=3D"mailto:jheitz@cisco.com" tar=
get=3D"_blank">jheitz@cisco.com</a>&gt;; Robert Raszuk &lt;<a href=3D"mailt=
o:robert@raszuk.net" target=3D"_blank">robert@raszuk.net</a>&gt;; Susan Har=
es &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@ndzh.com=
</a>&gt;<br>
<b>Cc:</b> idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;; <a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">id=
r-ads@ietf.org</a>; <a href=3D"mailto:idr-chairs@ietf.org" target=3D"_blank=
">idr-chairs@ietf.org</a><br>
<b>Subject:</b> RE: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wb=
r>messages (11/12 to 11/26)<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">I was thinking of something more along th=
e lines of
<a href=3D"https://tools.ietf.org/html/rfc7606#section-8" target=3D"_blank"=
>https://tools.ietf.org/html/<wbr>rfc7606#section-8</a> e.g.<u></u><u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">=C2=A7 Guidance for Authors of BGP Specif=
ications<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">=C2=A0=C2=A0 A document that specifies a =
new BGP attribute that may not fit in a 4096-octet limit MUST provide speci=
fics<u></u><u></u></span></p>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,sans-ser=
if;color:black">=C2=A0=C2=A0 regarding how to advertise a BGP message large=
r than 4096 octets to a speaker that does not support Extended Messages. In=
 particular whether the removal of the attribute is allowed/advertised or n=
ot. Trade-offs are likely similar to the ones discussed in RFC 7606. </span=
><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,serif"=
>In particular, if the<u></u><u></u></span></pre>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif">=C2=A0=C2=A0 attribute in question has or may have a=
n effect on route selection or<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif">=C2=A0=C2=A0 installation, the presumption is that r=
emoving it is unsafe unless<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif">=C2=A0=C2=A0
</span><span lang=3D"FR" style=3D"font-size:10.0pt;font-family:&quot;Courie=
r New&quot;,serif">careful analysis proves otherwise.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">--<u></u><u></u></span></p>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,sans-ser=
if;color:black">=E2=80=9C</span><span style=3D"font-size:10.0pt;font-family=
:&quot;Courier New&quot;,serif">Multi-octet fields MUST be in network byte =
order.=E2=80=9D<u></u><u></u></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,se=
rif">Possibly a reference could be added, specifying this =E2=80=9Cnetwork =
byte order=E2=80=9D. (especially for a MUST)<u></u><u></u></span></pre>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">Thanks,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">Regards,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black">--Bruno<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"><u></u>=C2=A0<u></u></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 #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span lang=3D"FR" style=3D"font-size:10.0pt;font-=
family:&quot;Tahoma&quot;,sans-serif">From:</span></b><span lang=3D"FR" sty=
le=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif"> Idr [<a =
href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">mailto:idr-bounces@i=
etf.org</a>]
<b>On Behalf Of </b>Jakob Heitz (jheitz)<br>
<b>Sent:</b> Thursday, November 16, 2017 3:24 AM<br>
<b>To:</b> Robert Raszuk; Susan Hares<br>
<b>Cc:</b> idr wg; <a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">id=
r-ads@ietf.org</a>; <a href=3D"mailto:idr-chairs@ietf.org" target=3D"_blank=
">
idr-chairs@ietf.org</a><br>
<b>Subject:</b> Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wb=
r>messages (11/12 to 11/26)<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"FR"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Good point Robert. How about adding so=
mething like:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Certain features used by some BGP spea=
kers require the use of extended messages.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Such features are indicated with a BGP=
 capability.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">If a BGP speaker sends an extended mes=
sage to a second speaker, but that message<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">does not use a feature that requires e=
xtended messages, then the contents of that<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">message may not be distributed correct=
ly throughout the BGP space to which that content is targeted.<u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">This is because while the immediate ne=
ighbor speaker may support extended messages, every<u></u><u></u></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">BGP speaker within the said BGP space =
might not support extended messages.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">For example, a certain BGP feature req=
uires the use of a large BGP attribute.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">This feature is not supported by every=
 BGP speaker within a BGP space.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">BGP updates with the large attribute r=
emoved might be acceptable to speakers<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">that do not support the feature, even =
though functionality is reduced without the feature.<u></u><u></u></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">If such a BGP update is longer than 40=
96 octets when the<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">large attribute is removed, then it ca=
nnot be distributed to those speakers.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">To prevent the failures outlined above=
, a BGP speaker SHOULD not generate a message<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">that is longer than 4096 octets if a f=
eature that requires extended messages is not used.<u></u><u></u></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Furthermore, a BGP speaker SHOULD not =
generate a message that cannot be reduced to<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">4096 octets or less by another speaker=
 that needs to remove the feature that requires<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">extended messages.<u></u><u></u></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Thanks,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Jakob<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<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"> Idr [<a href=3D"mailto:idr-bou=
nces@ietf.org" target=3D"_blank">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> Wednesday, November 15, 2017 5:56 AM<br>
<b>To:</b> Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_bl=
ank">shares@ndzh.com</a>&gt;<br>
<b>Cc:</b> idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;; <a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">
idr-ads@ietf.org</a>; <a href=3D"mailto:idr-chairs@ietf.org" target=3D"_bla=
nk">idr-chairs@ietf.org</a><br>
<b>Subject:</b> Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wb=
r>messages (11/12 to 11/26)<u></u><u></u></span></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Hi,</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">I am concerned with the lack of clear description of what router which=
 supports extended msg should do=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">when on one side he receives an attribute bigger then 4K and not of al=
l it&#39;s peers can handle it.</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">IMO the below statement is true but a bit too vague:</span><u></u><u><=
/u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">&quot;</span><span style=3D"font-size:10.0pt;font-family:&quot;Arial&q=
uot;,sans-serif;color:black">Therefore putting=C2=A0an attribute which can =
not be decomposed to 4096 octets or less in an</span><u></u><u></u></p>
</div>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,sans-ser=
if;color:black">=C2=A0=C2=A0 Extended Message is a likely path to routing f=
ailure.<u></u><u></u></span></pre>
<div>
<pre><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:black">=
=E2=80=8B&quot;<u></u><u></u></span></pre>
</div>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,se=
rif;color:black"><u></u>=C2=A0<u></u></span></pre>
<div>
<pre><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:black">=
=E2=80=8BAnd the worst part is that the BGP speaker which in fact generated=
 <u></u><u></u></span></pre>
</div>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,sans-ser=
if;color:black">such attribute =E2=80=8B</span><span style=3D"font-size:10.=
0pt;font-family:&quot;Courier New&quot;,serif;color:black"><u></u><u></u></=
span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,sans-ser=
if;color:black">be it on purpose or by error will not find out that its pro=
pagation has </span><span style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;,serif;color:black"><u></u><u></u></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Arial&quot;,sans-ser=
if;color:black">failed one or N hops away. </span><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;,serif;color:black"><u></u><u></u=
></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,se=
rif;color:black"><u></u>=C2=A0<u></u></span></pre>
<div>
<pre><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:black">=
=E2=80=8BToday when one is trying to inject msg over 4K (say due to a bug) =
it will fail locally, </span><span style=3D"font-family:&quot;Courier New&q=
uot;,serif;color:black"><u></u><u></u></span></pre>
</div>
<div>
<pre><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:black">g=
enerate syslog etc ... =E2=80=8B</span><span style=3D"font-family:&quot;Cou=
rier New&quot;,serif;color:black"><u></u><u></u></span></pre>
</div>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,se=
rif;color:black"><u></u>=C2=A0<u></u></span></pre>
<div>
<pre><span style=3D"font-family:&quot;Courier New&quot;,serif;color:black">=
<u></u>=C2=A0<u></u></span></pre>
</div>
<div>
<pre><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:black">A=
ny comments from authors and WG on that ?</span><span style=3D"font-family:=
&quot;Courier New&quot;,serif;color:black"><u></u><u></u></span></pre>
</div>
<div>
<pre><span style=3D"font-family:&quot;Courier New&quot;,serif;color:black">=
<u></u>=C2=A0<u></u></span></pre>
</div>
<div>
<pre><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:black">T=
hx,</span><span style=3D"font-family:&quot;Courier New&quot;,serif;color:bl=
ack"><u></u><u></u></span></pre>
</div>
<div>
<pre><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:black">R=
.</span><span style=3D"font-family:&quot;Courier New&quot;,serif;color:blac=
k"><u></u><u></u></span></pre>
</div>
<div>
<pre><span style=3D"font-family:&quot;Courier New&quot;,serif;color:black">=
<u></u>=C2=A0<u></u></span></pre>
</div>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,se=
rif;color:black"><u></u>=C2=A0<u></u></span></pre>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,se=
rif;color:black"><u></u>=C2=A0<u></u></span></pre>
<div>
<pre><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:black"><=
u></u>=C2=A0<u></u></span></pre>
</div>
<div>
<pre><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:black">=
=E2=80=8B<u></u><u></u></span></pre>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Sun, Nov 12, 2017 at 11:47 PM, Susan Hares &lt;<a=
 href=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@ndzh.com</a>&gt; =
wrote:<u></u><u></u></p>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal">This begins a 2 week WG LC for draft-ietf-idr-bgp-ex=
tended-<wbr>messages (11/12 to 11/26).=C2=A0 Please note this draft has at =
least 2 implementations. =C2=A0=C2=A0=C2=A0Please comment on whether you fe=
el
 this draft is ready for publication.=C2=A0=C2=A0 <u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:#888888">=C2=A0<u></u><u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#888888">Susan Hares
<u></u><u></u></span></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">PS =E2=80=93 the request for this WG LC is at:<u></u=
><u></u></p>
<p class=3D"MsoNormal"><a href=3D"https://www.ietf.org/mail-archive/web/idr=
/current/msg18801.html" target=3D"_blank">https://www.ietf.org/mail-<wbr>ar=
chive/web/idr/current/<wbr>msg18801.html</a><u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<pre><span style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;,se=
rif;color:black"> </span><span style=3D"font-size:10.0pt;font-family:&quot;=
Courier New&quot;,serif"><u></u><u></u></span></pre>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" target=3D"_blank">htt=
ps://www.ietf.org/mailman/<wbr>listinfo/idr</a><u></u><u></u></p>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
<pre><span lang=3D"FR" style=3D"font-size:10.0pt;font-family:&quot;Courier =
New&quot;,serif">______________________________<wbr>_______________________=
_______<wbr>______________________________<wbr>____________________________=
__<wbr>_<u></u><u></u></span></pre>
<pre><span lang=3D"FR" style=3D"font-size:10.0pt;font-family:&quot;Courier =
New&quot;,serif"><u></u>=C2=A0<u></u></span></pre>
<pre><span lang=3D"FR" style=3D"font-size:10.0pt;font-family:&quot;Courier =
New&quot;,serif">Ce message et ses pieces jointes peuvent contenir des info=
rmations confidentielles ou privilegiees et ne doivent donc<u></u><u></u></=
span></pre>
<pre><span lang=3D"FR" style=3D"font-size:10.0pt;font-family:&quot;Courier =
New&quot;,serif">pas etre diffuses, exploites ou copies sans autorisation. =
Si vous avez recu ce message par erreur, veuillez le signaler<u></u><u></u>=
</span></pre>
<pre><span lang=3D"FR" style=3D"font-size:10.0pt;font-family:&quot;Courier =
New&quot;,serif">a l&#39;expediteur et le detruire ainsi que les pieces joi=
ntes. Les messages electroniques etant susceptibles d&#39;alteration,<u></u=
><u></u></span></pre>
<pre><span lang=3D"FR" style=3D"font-size:10.0pt;font-family:&quot;Courier =
New&quot;,serif">Orange decline toute responsabilite si ce message a ete al=
tere, deforme ou falsifie. Merci.<u></u><u></u></span></pre>
<pre><span lang=3D"FR" style=3D"font-size:10.0pt;font-family:&quot;Courier =
New&quot;,serif"><u></u>=C2=A0<u></u></span></pre>
<pre><span lang=3D"FR" style=3D"font-size:10.0pt;font-family:&quot;Courier =
New&quot;,serif">This message and its attachments may contain confidential =
or privileged information that may be protected by law;<u></u><u></u></span=
></pre>
<pre><span lang=3D"FR" style=3D"font-size:10.0pt;font-family:&quot;Courier =
New&quot;,serif">they should not be distributed, used or copied without aut=
horisation.<u></u><u></u></span></pre>
<pre><span lang=3D"FR" style=3D"font-size:10.0pt;font-family:&quot;Courier =
New&quot;,serif">If you have received this email in error, please notify th=
e sender and delete this message and its attachments.<u></u><u></u></span><=
/pre>
<pre><span lang=3D"FR" style=3D"font-size:10.0pt;font-family:&quot;Courier =
New&quot;,serif">As emails may be altered, Orange is not liable for message=
s that have been modified, changed or falsified.<u></u><u></u></span></pre>
<pre><span lang=3D"FR" style=3D"font-size:10.0pt;font-family:&quot;Courier =
New&quot;,serif">Thank you.<u></u><u></u></span></pre>
</div>
</div>

</blockquote></div></div>

--94eb2c1cb82c9823e5055e15012c--


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Date: Thu, 16 Nov 2017 13:17:15 +0100
From: Job Snijders <job@ntt.net>
To: Robert Raszuk <robert@raszuk.net>
Cc: "Jakob Heitz (jheitz)" <jheitz@cisco.com>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, bruno.decraene@orange.com, "idr-ads@ietf.org" <idr-ads@ietf.org>, Susan Hares <shares@ndzh.com>, idr wg <idr@ietf.org>
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On Thu, Nov 16, 2017 at 08:59:56AM +0100, Robert Raszuk wrote:
> As far as proposing text .. one practical option I see which will allow to
> introduce extended msg without risk of breaking current networks would be
> to define a new BGP message type: "BGP LARGE UPDATE MSG".

How is a new BGP message type any different than negotiating through a
capability whether an extended message can be handled by the peer.

> You still have the same problem there of handling support between new
> and old peers, but at least you are not potentially  breaking what
> works today nor are introducing new attack vectors to existing
> deployments.

I'm not sure I follow your reasoning. 

Kind regards,

Job


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Date: Thu, 16 Nov 2017 14:09:01 +0100
From: Job Snijders <job@ntt.net>
To: Robert Raszuk <robert@raszuk.net>
Cc: Susan Hares <shares@ndzh.com>, idr wg <idr@ietf.org>, idr-ads@ietf.org, idr-chairs@ietf.org
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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On Wed, Nov 15, 2017 at 02:56:01PM +0100, Robert Raszuk wrote:
> I am concerned with the lack of clear description of what router which
> supports extended msg should do when on one side he receives an
> attribute bigger then 4K and not of all it's peers can handle it.
> 
> IMO the below statement is true but a bit too vague:
> 
> "Therefore putting an attribute which can not be decomposed to 4096
> octets or less in an Extended Message is a likely path to routing
> failure."
> 
> And the worst part is that the BGP speaker which in fact generated
> such attribute be it on purpose or by error will not find out that its
> propagation has failed one or N hops away.
> 
> Today when one is trying to inject msg over 4K (say due to a bug) it
> will fail locally, generate syslog etc ... 
> 
> Any comments from authors and WG on that ?

Let's not forget this draft idea has been around since 2011. To prevent
path / routing failures, we'd better get a move on and start deplying.

Kind regards,

Job


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Date: Thu, 16 Nov 2017 14:15:11 +0100
From: Job Snijders <job@ntt.net>
To: Susan Hares <shares@ndzh.com>, idr wg <idr@ietf.org>, santiago@crfreenet.org
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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On Wed, Nov 15, 2017 at 02:16:00PM +0100, Job Snijders wrote:
> Susan Hares wrote:
> > This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages
> > (11/12 to 11/26).  Please note this draft has at least 2
> > implementations.
> 
> The implementation report is available here:
> https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-extended-implementations

It appears that BIRD also has an implementation. (I have not tested it,
so I won't add it myself to the implementation wiki page)

    """
    enable extended messages [switch]

    The BGP protocol uses maximum message length of 4096 bytes. This
    option provides an extension to allow extended messages with length
    up to 65535 bytes. Default: off.
    """
    http://bird.network.cz/?get_doc&f=bird-6.html#ss6.3

Kind regards,

Job


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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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--001a11491d2ada8ef1055e199939
Content-Type: text/plain; charset="UTF-8"
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>
> How is a new BGP message type any different than negotiating through a
> capability whether an extended message can be handled by the peer.
>

=E2=80=8BBecause it is not about what your peer can handle. It is about wha=
t *all*
BGP speakers can handle and what to do when you get to narrow street with
this truck.

it is mainly about not breaking what works today as discussed already when
someone will send 5K of Large Community Attribute.
=E2=80=8B
=E2=80=8BMaybe rather then new message the draft could simply say that none=
 of
existing BGP Attributes (defined before this RFC goes out) MUST ever exceed
4K in total and only the new attributes will =E2=80=8Bbe allowed to be big =
if they
want - then I am happy to keep all in current UPDATE msg type. And the new
fat attributes specs as Bruno suggested must describe on their own how to
handle peers with only 4K messages.

Peace ?

Cheers,
R.

PS. The fact that spec been around from 2011 and has no major
implementation (Cisco, Arista, Juniper, Nokia etc..) does not really help
...

--001a11491d2ada8ef1055e199939
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #c=
cc solid;padding-left:1ex">How is a new BGP message type any different than=
 negotiating through a<br>
capability whether an extended message can be handled by the peer.<br></blo=
ckquote><div><br></div><div><div class=3D"gmail_default" style=3D"font-fami=
ly:arial,helvetica,sans-serif;font-size:small">=E2=80=8BBecause it is not a=
bout what your peer can handle. It is about what *all* BGP speakers can han=
dle and what to do when you get to narrow street with this truck.</div><div=
 class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fo=
nt-size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:=
arial,helvetica,sans-serif;font-size:small">it is mainly about not breaking=
 what works today as discussed already when someone will send 5K of Large C=
ommunity Attribute.</div><div class=3D"gmail_default" style=3D"font-family:=
arial,helvetica,sans-serif;font-size:small">=E2=80=8B</div></div><div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">=E2=80=8BMaybe rather then new message the draft could simply=
 say that none of existing BGP Attributes (defined before this RFC goes out=
) MUST ever exceed 4K in total and only the new attributes will =E2=80=8Bbe=
 allowed to be big if they want - then I am happy to keep all in current UP=
DATE msg type. And the new fat attributes specs as Bruno suggested must des=
cribe on their own how to handle peers with only 4K messages.=C2=A0</div><d=
iv class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;=
font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small">Peace ?</div><div class=3D"gm=
ail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:smal=
l"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvet=
ica,sans-serif;font-size:small">Cheers,</div><div class=3D"gmail_default" s=
tyle=3D"font-family:arial,helvetica,sans-serif;font-size:small">R.</div></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small">PS. The fact that spec b=
een around from 2011 and has no major implementation (Cisco, Arista, Junipe=
r, Nokia etc..) does not really help ...</div></div><br></div></div>

--001a11491d2ada8ef1055e199939--


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Subject: [Idr] I-D Action: draft-ietf-idr-flowspec-nvo3-01.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 Inter-Domain Routing WG of the IETF.

        Title           : Dissemination of NVO3 Flow Specification Rules
        Authors         : Donald Eastlake
                          Weiguo Hao
                          Shunwan Zhuang
                          Zhenbin Li
                          Rong Gu
	Filename        : draft-ietf-idr-flowspec-nvo3-01.txt
	Pages           : 13
	Date            : 2017-11-16

Abstract:
   This draft proposes a new subset of component types to support the
   NVO3 flow-spec application.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-flowspec-nvo3/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-flowspec-nvo3-01
https://datatracker.ietf.org/doc/html/draft-ietf-idr-flowspec-nvo3-01

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-flowspec-nvo3-01


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: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Randy Bush <randy@psg.com>
CC: Interminable Discussion Room <idr@ietf.org>
Thread-Topic: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
Thread-Index: AdNcB5lUqir6ZylBRUe7xuFnWiyeYQCRCmeAAAKXf6AADgWzoAAEnWDQAA2aSYAAD2nugA==
Date: Thu, 16 Nov 2017 20:00:24 +0000
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Yes, extended-messages was originally proposed, because bgpsec required it.
However, it doesn't anymore, because it is now using a shorter signature th=
an before.
https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-sidr-bgpsec-protocol-23.tx=
t

There are some cases in EVPN that require lots of extended communities to b=
e sent.
This is why in my proposed text, I said "feature" not "capability".

Thanks,
Jakob


-----Original Message-----
From: Randy Bush [mailto:randy@psg.com]=20
Sent: Wednesday, November 15, 2017 10:33 PM
To: Jakob Heitz (jheitz) <jheitz@cisco.com>
Cc: Interminable Discussion Room <idr@ietf.org>
Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (=
11/12 to 11/26)

> The reason I went further than that is that with extended messages,
> it's not just about a speaker and its neighbor anymore, it's about a
> whole BGP space.

< bitchiness, it's been two weeks in s'pore >

the original extended messages draft was restricted to update messages
for the purpose of bgpsec.  and bgpsec required it.  and when bgpsec
hits a neighbor which does not speak bgpsec, it strips all the crypto
bloat and then the update fits in 4095 as it is the same as today.  this
was not an accident.

but the idr wg, it its tradition of embellishment, asked for other
messages to be extended (some suggested open be extended too, a real
rat-hole).  well, bright folk, you want it, you figure it out.  send
text.  and small simple text, < 500 words.  if you can not keep it
simple, that should tell you something.

rndy


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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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--94eb2c1cb82cb80270055e2fe52b
Content-Type: text/plain; charset="UTF-8"

Hi Jakob,

So if this is no longer needed for bgpsec perhaps you can share with IDR
what type of cargo BESS cooked for BGP transport jets to now carry ?

Millions of MAC addresses packed into extended communities ? Something
worse ?

Thanks a lot,
Robert.


On Thu, Nov 16, 2017 at 9:00 PM, Jakob Heitz (jheitz) <jheitz@cisco.com>
wrote:

> Yes, extended-messages was originally proposed, because bgpsec required it.
> However, it doesn't anymore, because it is now using a shorter signature
> than before.
> https://tools.ietf.org/rfcdiff?url2=draft-ietf-sidr-bgpsec-protocol-23.txt
>
> There are some cases in EVPN that require lots of extended communities to
> be sent.
> This is why in my proposed text, I said "feature" not "capability".
>
> Thanks,
> Jakob
>
>
> -----Original Message-----
> From: Randy Bush [mailto:randy@psg.com]
> Sent: Wednesday, November 15, 2017 10:33 PM
> To: Jakob Heitz (jheitz) <jheitz@cisco.com>
> Cc: Interminable Discussion Room <idr@ietf.org>
> Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages
> (11/12 to 11/26)
>
> > The reason I went further than that is that with extended messages,
> > it's not just about a speaker and its neighbor anymore, it's about a
> > whole BGP space.
>
> < bitchiness, it's been two weeks in s'pore >
>
> the original extended messages draft was restricted to update messages
> for the purpose of bgpsec.  and bgpsec required it.  and when bgpsec
> hits a neighbor which does not speak bgpsec, it strips all the crypto
> bloat and then the update fits in 4095 as it is the same as today.  this
> was not an accident.
>
> but the idr wg, it its tradition of embellishment, asked for other
> messages to be extended (some suggested open be extended too, a real
> rat-hole).  well, bright folk, you want it, you figure it out.  send
> text.  and small simple text, < 500 words.  if you can not keep it
> simple, that should tell you something.
>
> rndy
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>

--94eb2c1cb82cb80270055e2fe52b
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Jakob,</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">So if this is no longer needed for bgpsec perhaps y=
ou can share with IDR what type of cargo BESS cooked for BGP transport jets=
 to now carry ?</div><div class=3D"gmail_default" style=3D"font-family:aria=
l,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Millio=
ns of MAC addresses packed into extended communities ? Something worse ?</d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small">Thanks a lot,</div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">Robert.</div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail=
_extra"><br><div class=3D"gmail_quote">On Thu, Nov 16, 2017 at 9:00 PM, Jak=
ob Heitz (jheitz) <span dir=3D"ltr">&lt;<a href=3D"mailto:jheitz@cisco.com"=
 target=3D"_blank">jheitz@cisco.com</a>&gt;</span> wrote:<br><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;p=
adding-left:1ex">Yes, extended-messages was originally proposed, because bg=
psec required it.<br>
However, it doesn&#39;t anymore, because it is now using a shorter signatur=
e than before.<br>
<a href=3D"https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-sidr-bgpsec-pro=
tocol-23.txt" rel=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/<=
wbr>rfcdiff?url2=3Ddraft-ietf-sidr-<wbr>bgpsec-protocol-23.txt</a><br>
<br>
There are some cases in EVPN that require lots of extended communities to b=
e sent.<br>
This is why in my proposed text, I said &quot;feature&quot; not &quot;capab=
ility&quot;.<br>
<br>
Thanks,<br>
Jakob<br>
<span class=3D"im HOEnZb"><br>
<br>
-----Original Message-----<br>
From: Randy Bush [mailto:<a href=3D"mailto:randy@psg.com">randy@psg.com</a>=
]<br>
Sent: Wednesday, November 15, 2017 10:33 PM<br>
To: Jakob Heitz (jheitz) &lt;<a href=3D"mailto:jheitz@cisco.com">jheitz@cis=
co.com</a>&gt;<br>
</span><span class=3D"im HOEnZb">Cc: Interminable Discussion Room &lt;<a hr=
ef=3D"mailto:idr@ietf.org">idr@ietf.org</a>&gt;<br>
Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wbr>messa=
ges (11/12 to 11/26)<br>
<br>
</span><div class=3D"HOEnZb"><div class=3D"h5">&gt; The reason I went furth=
er than that is that with extended messages,<br>
&gt; it&#39;s not just about a speaker and its neighbor anymore, it&#39;s a=
bout a<br>
&gt; whole BGP space.<br>
<br>
&lt; bitchiness, it&#39;s been two weeks in s&#39;pore &gt;<br>
<br>
the original extended messages draft was restricted to update messages<br>
for the purpose of bgpsec.=C2=A0 and bgpsec required it.=C2=A0 and when bgp=
sec<br>
hits a neighbor which does not speak bgpsec, it strips all the crypto<br>
bloat and then the update fits in 4095 as it is the same as today.=C2=A0 th=
is<br>
was not an accident.<br>
<br>
but the idr wg, it its tradition of embellishment, asked for other<br>
messages to be extended (some suggested open be extended too, a real<br>
rat-hole).=C2=A0 well, bright folk, you want it, you figure it out.=C2=A0 s=
end<br>
text.=C2=A0 and small simple text, &lt; 500 words.=C2=A0 if you can not kee=
p it<br>
simple, that should tell you something.<br>
<br>
rndy<br>
<br>
______________________________<wbr>_________________<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" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
</div></div></blockquote></div><br></div></div>

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To: Robert Raszuk <robert@raszuk.net>
CC: Interminable Discussion Room <idr@ietf.org>
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--_000_e0d75bb572454c15b50279cdf676c359XCHALN014ciscocom_--


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Date: Fri, 17 Nov 2017 19:55:05 +0100
From: Job Snijders <job@ntt.net>
To: Robert Raszuk <robert@raszuk.net>
Cc: "Jakob Heitz (jheitz)" <jheitz@cisco.com>, Susan Hares <shares@ndzh.com>, idr wg <idr@ietf.org>
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Hi Robert,

On Thu, Nov 16, 2017 at 02:28:51PM +0100, Robert Raszuk wrote:
> > How is a new BGP message type any different than negotiating through
> > a capability whether an extended message can be handled by the peer.
> 
> Because it is not about what your peer can handle. It is about what
> *all* BGP speakers can handle and what to do when you get to narrow
> street with this truck.
> 
> it is mainly about not breaking what works today as discussed already
> when someone will send 5K of Large Community Attribute.
>
> Maybe rather then new message the draft could simply say that none of
> existing BGP Attributes (defined before this RFC goes out) MUST ever
> exceed 4K in total and only the new attributes will be allowed to be
> big if they want - then I am happy to keep all in current UPDATE msg
> type. And the new fat attributes specs as Bruno suggested must
> describe on their own how to handle peers with only 4K messages.
> 
> Peace ?

This is an interesting angle. Your proposal allows for the specification
(and hopefully more code) to start shipping, and at a later point the
flood gates can be opened (for 'old world' attributes) if the WG deems
tjat appropiate.

Proposed text:

----
OLD:
    A BGP announcement will, in the normal case, propagate throughout
    the BGP speaking Internet; and there will undoubtedly be BGP
    speakers which do not have the Extended Message capability.
    Therefore putting an attribute which can not be decomposed to 4096
    octets or less in an Extended Message is a likely path to routing
    failure.
   
NEW:
    A BGP announcement will, in the normal case, propagate throughout
    the BGP speaking Internet; and there will undoubtedly be BGP
    speakers which do not have the Extended Message capability.
    Therefore putting an attribute which can not be decomposed to 4096
    octets or less in an Extended Message is a likely path to routing
    failure.

    It is RECOMMENDED that BGP protocol developers and implementers are
    conservative in their application and use of Extended Messages.
    Future protocol specifications will need to describe how to handle
    peers which can only accomodate 4096 octet messages.
----

Kind regards,

Job

ps. Since I don't think we can say "we'll never need larger than 4096",
I think it is important to get this one shipped. The curious thing is
that we'll need to have code deployed in the wild, _before_ any
application can start using it. The WG LC is about a reasonable proposal
to bump the limit in a way that is incrementally deployable (e.g.
capability negotated).


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> Yes, extended-messages was originally proposed, because bgpsec required it.
> However, it doesn't anymore, because it is now using a shorter signature
> than before.

this statement is untrue


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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 Inter-Domain Routing WG of the IETF.

        Title           : Extended Message support for BGP
        Authors         : Randy Bush
                          Keyur Patel
                          Dave Ward
	Filename        : draft-ietf-idr-bgp-extended-messages-24.txt
	Pages           : 6
	Date            : 2017-11-18

Abstract:
   The BGP specification mandates a maximum BGP message size of 4096
   octets.  As BGP is extended to support newer AFI/SAFIs and other
   features, there is a need to extend the maximum message size beyond
   4096 octets.  This document updates the BGP specification RFC4271 by
   providing an extension to BGP to extend its current maximum message
   size from 4096 octets to 65535 octets for all except the OPEN
   message.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-bgp-extended-messages/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-bgp-extended-messages-24
https://datatracker.ietf.org/doc/html/draft-ietf-idr-bgp-extended-messages-24

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-bgp-extended-messages-24


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: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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> Look for $B!H(Bextended$B!I(B in this diff. All references to extended messages
> were removed in draft 23.
> https://tools.ietf.org/rfcdiff?url2=draft-ietf-sidr-bgpsec-protocol-23.txt

to get it past the normative ref problem as extended messages was stuck
in the idr <bleep>


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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Randy Bush <randy@psg.com>
CC: Interminable Discussion Room <idr@ietf.org>
Thread-Topic: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Date: Sun, 19 Nov 2017 09:03:17 +0000
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From: Robert Raszuk <robert@raszuk.net>
Date: Sun, 19 Nov 2017 23:04:50 +0100
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To: Job Snijders <job@ntt.net>
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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--f403043868bcaba838055e5d28bf
Content-Type: text/plain; charset="UTF-8"

Hi Job,

The new proposed text is an improvement, but it still does not describe
what a BGP speaker should do when receiving any existing attribute (say
extended community) packed with RTs exceeding in total 4K and needs to send
it to "old" peer.

IMO we do need to define the recommended behavior before we progress this
to RFC. Just like we did so in migration to 4 octet AS in rfc6793.

Possible options:

1. Drop the update (bit ugly as such drop will be silent .. other then
local syslog/error report)

2. Drop the big attribute and insert defined here standard community or
some other marker indicating MSG_TRUNCATED info.

More ?

Thx,
R.

On Fri, Nov 17, 2017 at 7:55 PM, Job Snijders <job@ntt.net> wrote:

> Hi Robert,
>
> On Thu, Nov 16, 2017 at 02:28:51PM +0100, Robert Raszuk wrote:
> > > How is a new BGP message type any different than negotiating through
> > > a capability whether an extended message can be handled by the peer.
> >
> > Because it is not about what your peer can handle. It is about what
> > *all* BGP speakers can handle and what to do when you get to narrow
> > street with this truck.
> >
> > it is mainly about not breaking what works today as discussed already
> > when someone will send 5K of Large Community Attribute.
> >
> > Maybe rather then new message the draft could simply say that none of
> > existing BGP Attributes (defined before this RFC goes out) MUST ever
> > exceed 4K in total and only the new attributes will be allowed to be
> > big if they want - then I am happy to keep all in current UPDATE msg
> > type. And the new fat attributes specs as Bruno suggested must
> > describe on their own how to handle peers with only 4K messages.
> >
> > Peace ?
>
> This is an interesting angle. Your proposal allows for the specification
> (and hopefully more code) to start shipping, and at a later point the
> flood gates can be opened (for 'old world' attributes) if the WG deems
> tjat appropiate.
>
> Proposed text:
>
> ----
> OLD:
>     A BGP announcement will, in the normal case, propagate throughout
>     the BGP speaking Internet; and there will undoubtedly be BGP
>     speakers which do not have the Extended Message capability.
>     Therefore putting an attribute which can not be decomposed to 4096
>     octets or less in an Extended Message is a likely path to routing
>     failure.
>
> NEW:
>     A BGP announcement will, in the normal case, propagate throughout
>     the BGP speaking Internet; and there will undoubtedly be BGP
>     speakers which do not have the Extended Message capability.
>     Therefore putting an attribute which can not be decomposed to 4096
>     octets or less in an Extended Message is a likely path to routing
>     failure.
>
>     It is RECOMMENDED that BGP protocol developers and implementers are
>     conservative in their application and use of Extended Messages.
>     Future protocol specifications will need to describe how to handle
>     peers which can only accomodate 4096 octet messages.
> ----
>
> Kind regards,
>
> Job
>
> ps. Since I don't think we can say "we'll never need larger than 4096",
> I think it is important to get this one shipped. The curious thing is
> that we'll need to have code deployed in the wild, _before_ any
> application can start using it. The WG LC is about a reasonable proposal
> to bump the limit in a way that is incrementally deployable (e.g.
> capability negotated).
>

--f403043868bcaba838055e5d28bf
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Job,</div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small">The new proposed text is an improvement, but it still=
 does not describe what a BGP speaker should do when receiving any existing=
 attribute (say extended community) packed with RTs exceeding in total 4K a=
nd needs to send it to &quot;old&quot; peer.=C2=A0</div><div class=3D"gmail=
_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">=
<br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif;font-size:small">IMO we do need to define the recommended behav=
ior before we progress this to RFC. Just like we did so in migration to 4 o=
ctet AS in rfc6793.</div><div class=3D"gmail_default" style=3D"font-family:=
arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Po=
ssible options:<br></div><div class=3D"gmail_default" style=3D"font-family:=
arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">1.=
 Drop the update (bit ugly as such drop will be silent .. other then local =
syslog/error report)</div><div class=3D"gmail_default" style=3D"font-family=
:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">2=
. Drop the big attribute and insert defined here standard community or some=
 other marker indicating MSG_TRUNCATED info.=C2=A0</div><div class=3D"gmail=
_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">=
<br></div><div class=3D"gmail_default">More ?</div><div class=3D"gmail_defa=
ult"><br></div><div class=3D"gmail_default">Thx,<br>R.</div></div><div clas=
s=3D"gmail_extra"><br><div class=3D"gmail_quote">On Fri, Nov 17, 2017 at 7:=
55 PM, Job Snijders <span dir=3D"ltr">&lt;<a href=3D"mailto:job@ntt.net" ta=
rget=3D"_blank">job@ntt.net</a>&gt;</span> wrote:<br><blockquote class=3D"g=
mail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-l=
eft:1ex">Hi Robert,<br>
<span class=3D""><br>
On Thu, Nov 16, 2017 at 02:28:51PM +0100, Robert Raszuk wrote:<br>
&gt; &gt; How is a new BGP message type any different than negotiating thro=
ugh<br>
&gt; &gt; a capability whether an extended message can be handled by the pe=
er.<br>
&gt;<br>
&gt; Because it is not about what your peer can handle. It is about what<br=
>
&gt; *all* BGP speakers can handle and what to do when you get to narrow<br=
>
&gt; street with this truck.<br>
&gt;<br>
&gt; it is mainly about not breaking what works today as discussed already<=
br>
&gt; when someone will send 5K of Large Community Attribute.<br>
&gt;<br>
&gt; Maybe rather then new message the draft could simply say that none of<=
br>
&gt; existing BGP Attributes (defined before this RFC goes out) MUST ever<b=
r>
&gt; exceed 4K in total and only the new attributes will be allowed to be<b=
r>
&gt; big if they want - then I am happy to keep all in current UPDATE msg<b=
r>
&gt; type. And the new fat attributes specs as Bruno suggested must<br>
&gt; describe on their own how to handle peers with only 4K messages.<br>
&gt;<br>
&gt; Peace ?<br>
<br>
</span>This is an interesting angle. Your proposal allows for the specifica=
tion<br>
(and hopefully more code) to start shipping, and at a later point the<br>
flood gates can be opened (for &#39;old world&#39; attributes) if the WG de=
ems<br>
tjat appropiate.<br>
<br>
Proposed text:<br>
<br>
----<br>
OLD:<br>
=C2=A0 =C2=A0 A BGP announcement will, in the normal case, propagate throug=
hout<br>
=C2=A0 =C2=A0 the BGP speaking Internet; and there will undoubtedly be BGP<=
br>
=C2=A0 =C2=A0 speakers which do not have the Extended Message capability.<b=
r>
<span class=3D"">=C2=A0 =C2=A0 Therefore putting an attribute which can not=
 be decomposed to 4096<br>
=C2=A0 =C2=A0 octets or less in an Extended Message is a likely path to rou=
ting<br>
=C2=A0 =C2=A0 failure.<br>
<br>
</span>NEW:<br>
=C2=A0 =C2=A0 A BGP announcement will, in the normal case, propagate throug=
hout<br>
=C2=A0 =C2=A0 the BGP speaking Internet; and there will undoubtedly be BGP<=
br>
=C2=A0 =C2=A0 speakers which do not have the Extended Message capability.<b=
r>
<span class=3D"">=C2=A0 =C2=A0 Therefore putting an attribute which can not=
 be decomposed to 4096<br>
=C2=A0 =C2=A0 octets or less in an Extended Message is a likely path to rou=
ting<br>
=C2=A0 =C2=A0 failure.<br>
<br>
</span>=C2=A0 =C2=A0 It is RECOMMENDED that BGP protocol developers and imp=
lementers are<br>
=C2=A0 =C2=A0 conservative in their application and use of Extended Message=
s.<br>
=C2=A0 =C2=A0 Future protocol specifications will need to describe how to h=
andle<br>
=C2=A0 =C2=A0 peers which can only accomodate 4096 octet messages.<br>
----<br>
<br>
Kind regards,<br>
<br>
Job<br>
<br>
ps. Since I don&#39;t think we can say &quot;we&#39;ll never need larger th=
an 4096&quot;,<br>
I think it is important to get this one shipped. The curious thing is<br>
that we&#39;ll need to have code deployed in the wild, _before_ any<br>
application can start using it. The WG LC is about a reasonable proposal<br=
>
to bump the limit in a way that is incrementally deployable (e.g.<br>
capability negotated).<br>
</blockquote></div><br></div>

--f403043868bcaba838055e5d28bf--


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From: Muthu Arul Mozhi Perumal <muthu.arul@gmail.com>
Date: Mon, 20 Nov 2017 19:49:23 +0530
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Subject: [Idr] Query on draft-ietf-idr-bgp4-mibv2-15
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draft-ietf-idr-bgp4-mibv2 is supposed to address some of the key
deficiencies in the BGP-4 MIB [RFC4273] including the ability to monitor
IPv6 BGP peering sessions and carry IPv6 reachability.

However, that draft expired in 2014. Does anyone know why it didn't
progress further? Is there any other draft or RFC replacing it?

Regards,
Muthu

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<div dir=3D"ltr"><div class=3D"gmail_default"><font face=3D"arial, helvetic=
a, sans-serif">draft-ietf-idr-bgp4-mibv2 is supposed to address some of the=
 key deficiencies in the BGP-4 MIB [RFC4273] including the ability to monit=
or IPv6 BGP peering sessions and carry IPv6 reachability.</font><br></div><=
div class=3D"gmail_default"><font face=3D"arial, helvetica, sans-serif"><br=
></font></div><div class=3D"gmail_default"><font face=3D"arial, helvetica, =
sans-serif">However, that draft expired in 2014. Does anyone know why it di=
dn&#39;t progress further? Is there any other draft or RFC replacing it?</f=
ont></div><div class=3D"gmail_default"><font face=3D"arial, helvetica, sans=
-serif"><br></font></div><div class=3D"gmail_default"><font face=3D"arial, =
helvetica, sans-serif">Regards,</font></div><div class=3D"gmail_default"><f=
ont face=3D"arial, helvetica, sans-serif">Muthu</font></div></div>

--001a113ec53cf15b9a055e6ac56f--


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Muthu Arul Mozhi Perumal <muthu.arul@gmail.com>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] Query on draft-ietf-idr-bgp4-mibv2-15
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Subject: Re: [Idr] Query on draft-ietf-idr-bgp4-mibv2-15
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Acee Lindem (acee) wrote:
> The IETF has moved on from SNMP-based management to YANG, refer to this
> IESG statement:
> 
> https://www.ietf.org/iesg/statement/writable-mib-module.html

the rest of the world is going to take many years to catch up with this
decision - usable YANG is only beginning to make its way into a small
segment of high-end kit out there, and there is a large segment of
market kit where it is likely never to be deployed.

In the meantime - in this particular situation - we have no means of
monitoring ipv6 or vrf-enabled bgp sessions, other than screen-scraping.
 It shouldn't need pointing out that this is a deficit with serious
operational consequences.

Nick


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--001a11403450bbaa08055e6cd059
Content-Type: text/plain; charset="UTF-8"

The IESG statement is about standards-based approaches to configuration,
right? There are deployed SNMP based systems for monitoring that are
crucial for network operation. What is our recommendation towards them?

Regards,
Muthu

On Mon, Nov 20, 2017 at 8:44 PM, Acee Lindem (acee) <acee@cisco.com> wrote:

> Hi Muthu,
>
> The IETF has moved on from SNMP-based management to YANG, refer to this
> IESG statement:
>
> https://www.ietf.org/iesg/statement/writable-mib-module.html
>
> Thanks,
> Acee
>
> From: Idr <idr-bounces@ietf.org> on behalf of Muthu Arul Mozhi Perumal <
> muthu.arul@gmail.com>
> Date: Monday, November 20, 2017 at 9:19 AM
> To: IDR List <idr@ietf.org>
> Subject: [Idr] Query on draft-ietf-idr-bgp4-mibv2-15
>
> draft-ietf-idr-bgp4-mibv2 is supposed to address some of the key
> deficiencies in the BGP-4 MIB [RFC4273] including the ability to monitor
> IPv6 BGP peering sessions and carry IPv6 reachability.
>
> However, that draft expired in 2014. Does anyone know why it didn't
> progress further? Is there any other draft or RFC replacing it?
>
> Regards,
> Muthu
>
>

--001a11403450bbaa08055e6cd059
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">The IESG statement is about standards-b=
ased approaches to configuration, right? There are deployed SNMP based syst=
ems for monitoring that are crucial for network operation. What is our reco=
mmendation towards them?</div><div class=3D"gmail_default" style=3D"font-fa=
mily:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gm=
ail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:smal=
l">Regards,</div><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Muthu</div><div class=3D"gmail_extra"><=
br><div class=3D"gmail_quote">On Mon, Nov 20, 2017 at 8:44 PM, Acee Lindem =
(acee) <span dir=3D"ltr">&lt;<a href=3D"mailto:acee@cisco.com" target=3D"_b=
lank">acee@cisco.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,20=
4);padding-left:1ex">



<div style=3D"word-wrap:break-word">
<div style=3D"color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14p=
x">
Hi Muthu,=C2=A0</div>
<div style=3D"color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14p=
x">
<br>
</div>
<div style=3D"color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14p=
x">
The IETF has moved on from SNMP-based management to YANG, refer to this IES=
G statement:</div>
<div style=3D"color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14p=
x">
<br>
</div>
<div><font face=3D"Calibri,sans-serif"><a href=3D"https://www.ietf.org/iesg=
/statement/writable-mib-module.html" target=3D"_blank">https://www.ietf.org=
/iesg/<wbr>statement/writable-mib-module.<wbr>html</a></font></div>
<div><font face=3D"Calibri,sans-serif"><br>
</font></div>
<div><font face=3D"Calibri,sans-serif">Thanks,</font></div>
<div><font face=3D"Calibri,sans-serif">Acee</font></div>
<div style=3D"color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14p=
x">
<br>
</div>
<span id=3D"gmail-m_-7032315808138194361OLK_SRC_BODY_SECTION" style=3D"colo=
r:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px">
<div style=3D"font-family:Calibri;font-size:11pt;text-align:left;color:blac=
k;border-width:1pt medium medium;border-style:solid none none;border-bottom=
-color:initial;border-left-color:initial;padding:3pt 0in 0in;border-top-col=
or:rgb(181,196,223);border-right-color:initial">
<span style=3D"font-weight:bold">From: </span>Idr &lt;<a href=3D"mailto:idr=
-bounces@ietf.org" target=3D"_blank">idr-bounces@ietf.org</a>&gt; on behalf=
 of Muthu Arul Mozhi Perumal &lt;<a href=3D"mailto:muthu.arul@gmail.com" ta=
rget=3D"_blank">muthu.arul@gmail.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Monday, November 20, 2017 at =
9:19 AM<br>
<span style=3D"font-weight:bold">To: </span>IDR List &lt;<a href=3D"mailto:=
idr@ietf.org" target=3D"_blank">idr@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>[Idr] Query on draft-ietf-=
idr-bgp4-mibv2-15<br>
</div><div><div class=3D"gmail-h5">
<div><br>
</div>
<blockquote id=3D"gmail-m_-7032315808138194361MAC_OUTLOOK_ATTRIBUTION_BLOCK=
QUOTE">
<div>
<div>
<div dir=3D"ltr">
<div><font face=3D"arial,helvetica,sans-serif">draft-ietf-idr-bgp4-mibv2 is=
 supposed to address some of the key deficiencies in the BGP-4 MIB [RFC4273=
] including the ability to monitor IPv6 BGP peering sessions and carry IPv6=
 reachability.</font><br>
</div>
<div><font face=3D"arial,helvetica,sans-serif"><br>
</font></div>
<div><font face=3D"arial,helvetica,sans-serif">However, that draft expired =
in 2014. Does anyone know why it didn&#39;t progress further? Is there any =
other draft or RFC replacing it?</font></div>
<div><font face=3D"arial,helvetica,sans-serif"><br>
</font></div>
<div><font face=3D"arial,helvetica,sans-serif">Regards,</font></div>
<div><font face=3D"arial,helvetica,sans-serif">Muthu</font></div>
</div>
</div>
</div>
</blockquote>
</div></div></span>
</div>

</blockquote></div><br></div></div>

--001a11403450bbaa08055e6cd059--


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Nick Hilliard <nick@foobar.org>
CC: Muthu Arul Mozhi Perumal <muthu.arul@gmail.com>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] Query on draft-ietf-idr-bgp4-mibv2-15
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Date: Mon, 20 Nov 2017 16:55:22 +0000
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Subject: Re: [Idr] Query on draft-ietf-idr-bgp4-mibv2-15
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Nick Hilliard <nick@foobar.org>
CC: Muthu Arul Mozhi Perumal <muthu.arul@gmail.com>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] Query on draft-ietf-idr-bgp4-mibv2-15
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Date: Mon, 20 Nov 2017 17:28:09 +0000
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From nobody Tue Nov 21 02:26:46 2017
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From: Thomas Mangin <thomas.mangin@exa.net.uk>
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Date: Tue, 21 Nov 2017 10:26:35 +0000
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Hello Everyone,

I support the draft; and I therefore implemented it on ExaBGP master.

I am will keep an eye on the discussion regarding the potential issue =
transiting messages with larger than 4k total attributes size could =
cause.=20

I would have no objection myself on seeing an arbitrary limit on the =
Total Path Attribute set to prevent backward compatibility as the most =
likely quick win is going to be on packing more NLRI ATM.

That said, I am not aware of any guideline in previous RFC to cover this =
issue and it is already possible to encounter this problem today. So =
while the draft make the issue more likely, it does not make things =
worse from a specification POV.

I am therefore wondering if this should not be covered by another =
unrelated RFC as it can affect current speakers and is not specific to =
this draft.

Sincerely,

Thomas

> On 12 Nov 2017, at 22:47, Susan Hares <shares@ndzh.com> wrote:
>=20
> This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages =
(11/12 to 11/26).  Please note this draft has at least 2 =
implementations.    Please comment on whether you feel this draft is =
ready for publication.  =20
> =20
> Susan Hares=20
> =20
> PS =E2=80=93 the request for this WG LC is at:
> https://www.ietf.org/mail-archive/web/idr/current/msg18801.html =
<https://www.ietf.org/mail-archive/web/idr/current/msg18801.html>
> =20
> =20
> =20
> =20
> =20
> _______________________________________________
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charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><div =
class=3D"">Hello Everyone,</div><div class=3D""><br class=3D""></div><div =
class=3D""><div class=3D"">I support the draft; and I therefore =
implemented it on ExaBGP master.</div><div class=3D""><br =
class=3D""></div><div class=3D"">I am will keep an eye on the discussion =
regarding the potential issue transiting messages with larger than 4k =
total attributes size could cause.&nbsp;</div><div class=3D""><br =
class=3D""></div><div class=3D"">I would have no objection myself on =
seeing an arbitrary limit on the Total Path Attribute set to prevent =
backward compatibility as the most likely quick win is going to be on =
packing more NLRI ATM.</div><div class=3D""><br class=3D""></div><div =
class=3D"">That said, I am not aware of any guideline in previous RFC to =
cover this issue and it is already possible to encounter this problem =
today. So while the draft make the issue more likely, it does not make =
things worse from a specification POV.</div><div class=3D""><br =
class=3D""></div><div class=3D"">I am therefore wondering if this should =
not be covered by another unrelated RFC as it can affect current =
speakers and is not specific to this draft.</div><div class=3D""><br =
class=3D""></div><div class=3D"">Sincerely,</div><div class=3D""><br =
class=3D""></div><div class=3D"">Thomas<br class=3D""><div class=3D"">
<div style=3D"color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-size-adjust: auto; =
-webkit-text-stroke-width: 0px;"><br =
class=3D""></div></div><div><blockquote type=3D"cite" class=3D""><div =
class=3D"">On 12 Nov 2017, at 22:47, Susan Hares &lt;<a =
href=3D"mailto:shares@ndzh.com" class=3D"">shares@ndzh.com</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">This begins a 2 week WG LC for =
draft-ietf-idr-bgp-extended-messages (11/12 to 11/26).&nbsp; Please note =
this draft has at least 2 implementations. &nbsp;&nbsp;&nbsp;Please =
comment on whether you feel this draft is ready for =
publication.&nbsp;&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">Susan =
Hares<span class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">PS =E2=80=93=
 the request for this WG LC is at:<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><a =
href=3D"https://www.ietf.org/mail-archive/web/idr/current/msg18801.html" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">https://www.ietf.org/mail-archive/web/idr/current/msg18801.html=
</a><o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><pre style=3D"margin: 0in 0in 0.0001pt; =
font-size: 10pt; font-family: &quot;Courier New&quot;;" class=3D""><span =
style=3D"" class=3D""> <o:p class=3D""></o:p></span></pre><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: =
inline !important;" =
class=3D"">_______________________________________________</span><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">Idr mailing list</span><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><a =
href=3D"mailto:Idr@ietf.org" style=3D"color: purple; text-decoration: =
underline; font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" =
class=3D"">Idr@ietf.org</a><br style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><a =
href=3D"https://www.ietf.org/mailman/listinfo/idr" style=3D"color: =
purple; text-decoration: underline; font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-size-adjust: auto; =
-webkit-text-stroke-width: 0px;" =
class=3D"">https://www.ietf.org/mailman/listinfo/idr</a></div></blockquote=
></div><br class=3D""></div></div></body></html>=

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Hi Thomas,

Great that you implemented it in ExaBGP. Is it on by default or do you need
a global/per peer knob ?

- - -

As to your point that even today you may have the same problem ... well if
you consider the problem to be interworking between peers when one is
already receiving 4K update and want to add more stuff ... you are right it
can fail today.

But this is not the main problem I am pointing out. The problem is that in
the above case the local guy who is adding stuff to existing update will
locally and immediately know that it failed.

In the new model it is nodes far far away who happily injected larger then
4K update messages will never know that their updates never made it through
as they intended.

And since IDR and community failed to progress OPERATIONAL MSG in BGP
providing a bit of a ops feedback between peers and perhaps beyond we are
where we are. https://goo.gl/JTpQDc

Best,
Robert.


On Tue, Nov 21, 2017 at 11:26 AM, Thomas Mangin <thomas.mangin@exa.net.uk>
wrote:

> Hello Everyone,
>
> I support the draft; and I therefore implemented it on ExaBGP master.
>
> I am will keep an eye on the discussion regarding the potential issue
> transiting messages with larger than 4k total attributes size could cause=
.
>
> I would have no objection myself on seeing an arbitrary limit on the Tota=
l
> Path Attribute set to prevent backward compatibility as the most likely
> quick win is going to be on packing more NLRI ATM.
>
> That said, I am not aware of any guideline in previous RFC to cover this
> issue and it is already possible to encounter this problem today. So whil=
e
> the draft make the issue more likely, it does not make things worse from =
a
> specification POV.
>
> I am therefore wondering if this should not be covered by another
> unrelated RFC as it can affect current speakers and is not specific to th=
is
> draft.
>
> Sincerely,
>
> Thomas
>
> On 12 Nov 2017, at 22:47, Susan Hares <shares@ndzh.com> wrote:
>
> This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages
> (11/12 to 11/26).  Please note this draft has at least 2 implementations.
>    Please comment on whether you feel this draft is ready for publication=
.
>
>
> Susan Hares
>
> PS =E2=80=93 the request for this WG LC is at:
> https://www.ietf.org/mail-archive/web/idr/current/msg18801.html
>
>
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Thomas,</div><div class=3D"gmail_def=
ault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br>=
</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small">Great that you implemented it in ExaBGP. Is it on =
by default or do you need a global/per peer knob ?=C2=A0</div><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,hel=
vetica,sans-serif;font-size:small">- - -=C2=A0</div><div class=3D"gmail_def=
ault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br>=
</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small">As to your point that even today you may have the =
same problem ... well if you consider the problem to be interworking betwee=
n peers when one is already receiving 4K update and want to add more stuff =
... you are right it can fail today.=C2=A0</div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></di=
v><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small">But this is not the main problem I am pointing out. Th=
e problem is that in the above case the local guy who is adding stuff to ex=
isting update will locally and immediately know that it failed.=C2=A0</div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-fam=
ily:arial,helvetica,sans-serif;font-size:small">In the new model it is node=
s far far away who happily injected larger then 4K update messages will nev=
er know that their updates never made it through as they intended.</div><di=
v class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;f=
ont-size:small"><br></div><div class=3D"gmail_default" style=3D"font-family=
:arial,helvetica,sans-serif;font-size:small">And since IDR and community fa=
iled to progress OPERATIONAL MSG in BGP providing a bit of a ops feedback b=
etween peers and perhaps beyond we are where we are.=C2=A0<a href=3D"https:=
//goo.gl/JTpQDc">https://goo.gl/JTpQDc</a></div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></di=
v><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small">Best,</div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small">Robert.</div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small"><br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail=
_quote">On Tue, Nov 21, 2017 at 11:26 AM, Thomas Mangin <span dir=3D"ltr">&=
lt;<a href=3D"mailto:thomas.mangin@exa.net.uk" target=3D"_blank">thomas.man=
gin@exa.net.uk</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div=
 style=3D"word-wrap:break-word;line-break:after-white-space"><div>Hello Eve=
ryone,</div><div><br></div><div><div>I support the draft; and I therefore i=
mplemented it on ExaBGP master.</div><div><br></div><div>I am will keep an =
eye on the discussion regarding the potential issue transiting messages wit=
h larger than 4k total attributes size could cause.=C2=A0</div><div><br></d=
iv><div>I would have no objection myself on seeing an arbitrary limit on th=
e Total Path Attribute set to prevent backward compatibility as the most li=
kely quick win is going to be on packing more NLRI ATM.</div><div><br></div=
><div>That said, I am not aware of any guideline in previous RFC to cover t=
his issue and it is already possible to encounter this problem today. So wh=
ile the draft make the issue more likely, it does not make things worse fro=
m a specification POV.</div><div><br></div><div>I am therefore wondering if=
 this should not be covered by another unrelated RFC as it can affect curre=
nt speakers and is not specific to this draft.</div><div><br></div><div>Sin=
cerely,</div><div><br></div><div>Thomas<br><div>
<div style=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-st=
yle:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:norma=
l;text-align:start;text-indent:0px;text-transform:none;white-space:normal;w=
ord-spacing:0px"><br></div></div><div><blockquote type=3D"cite"><div><div c=
lass=3D"h5"><div>On 12 Nov 2017, at 22:47, Susan Hares &lt;<a href=3D"mailt=
o:shares@ndzh.com" target=3D"_blank">shares@ndzh.com</a>&gt; wrote:</div><b=
r class=3D"m_6988495671839111146Apple-interchange-newline"></div></div><div=
><div><div class=3D"h5"><div class=3D"m_6988495671839111146WordSection1" st=
yle=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-variant-=
caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-=
indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><div st=
yle=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-seri=
f">This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-<wbr>messages=
 (11/12 to 11/26).=C2=A0 Please note this draft has at least 2 implementati=
ons. =C2=A0=C2=A0=C2=A0Please comment on whether you feel this draft is rea=
dy for publication.=C2=A0=C2=A0<span class=3D"m_6988495671839111146Apple-co=
nverted-space">=C2=A0</span><u></u><u></u></div><div style=3D"margin:0in 0i=
n 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><u></u>=C2=A0<u><=
/u></div><div style=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:C=
alibri,sans-serif">Susan Hares<span class=3D"m_6988495671839111146Apple-con=
verted-space">=C2=A0</span><u></u><u></u></div><div style=3D"margin:0in 0in=
 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><u></u>=C2=A0<u></=
u></div><div style=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:Ca=
libri,sans-serif">PS =E2=80=93 the request for this WG LC is at:<u></u><u><=
/u></div><div style=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:C=
alibri,sans-serif"><a href=3D"https://www.ietf.org/mail-archive/web/idr/cur=
rent/msg18801.html" style=3D"color:purple;text-decoration:underline" target=
=3D"_blank">https://www.ietf.org/mail-<wbr>archive/web/idr/current/<wbr>msg=
18801.html</a><u></u><u></u></div><div style=3D"margin:0in 0in 0.0001pt;fon=
t-size:11pt;font-family:Calibri,sans-serif"><u></u>=C2=A0<u></u></div><div =
style=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-se=
rif"><u></u>=C2=A0<u></u></div><pre style=3D"margin:0in 0in 0.0001pt;font-s=
ize:10pt;font-family:&quot;Courier New&quot;"><span> <u></u><u></u></span><=
/pre><div style=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calib=
ri,sans-serif"><u></u>=C2=A0<u></u></div><div style=3D"margin:0in 0in 0.000=
1pt;font-size:11pt;font-family:Calibri,sans-serif"><u></u>=C2=A0<u></u></di=
v></div></div></div><span class=3D""><span style=3D"font-family:Helvetica;f=
ont-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal=
;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none=
;white-space:normal;word-spacing:0px;float:none;display:inline!important">_=
_____________________________<wbr>_________________</span><br style=3D"font=
-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal=
;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;=
text-transform:none;white-space:normal;word-spacing:0px"><span style=3D"fon=
t-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:norma=
l;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px=
;text-transform:none;white-space:normal;word-spacing:0px;float:none;display=
:inline!important">Idr mailing list</span><br style=3D"font-family:Helvetic=
a;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:nor=
mal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:n=
one;white-space:normal;word-spacing:0px"><a href=3D"mailto:Idr@ietf.org" st=
yle=3D"color:purple;text-decoration:underline;font-family:Helvetica;font-si=
ze:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;lette=
r-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white=
-space:normal;word-spacing:0px" target=3D"_blank">Idr@ietf.org</a><br style=
=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-variant-cap=
s:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-ind=
ent:0px;text-transform:none;white-space:normal;word-spacing:0px"><a href=3D=
"https://www.ietf.org/mailman/listinfo/idr" style=3D"color:purple;text-deco=
ration:underline;font-family:Helvetica;font-size:12px;font-style:normal;fon=
t-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:s=
tart;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0p=
x" target=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a></sp=
an></div></blockquote></div><br></div></div></div><br>_____________________=
_________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
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rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

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From: Thomas Mangin <thomas.mangin@exa.net.uk>
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Hello Robert,

As this is a capability, it is an option to be enabled per neighbour.

I thought it made sense to give the user control of this option: one may =
not want to enable the feature - and therefore they should be able to do =
so IMHO.

Thomas

> On 21 Nov 2017, at 14:22, Robert Raszuk <robert@raszuk.net> wrote:
>=20
> Hi Thomas,
>=20
> Great that you implemented it in ExaBGP. Is it on by default or do you =
need a global/per peer knob ?=20
>=20
> - - -=20
>=20
> As to your point that even today you may have the same problem ... =
well if you consider the problem to be interworking between peers when =
one is already receiving 4K update and want to add more stuff ... you =
are right it can fail today.=20
>=20
> But this is not the main problem I am pointing out. The problem is =
that in the above case the local guy who is adding stuff to existing =
update will locally and immediately know that it failed.=20
>=20
> In the new model it is nodes far far away who happily injected larger =
then 4K update messages will never know that their updates never made it =
through as they intended.
>=20
> And since IDR and community failed to progress OPERATIONAL MSG in BGP =
providing a bit of a ops feedback between peers and perhaps beyond we =
are where we are. https://goo.gl/JTpQDc <https://goo.gl/JTpQDc>
>=20
> Best,
> Robert.
>=20
>=20
> On Tue, Nov 21, 2017 at 11:26 AM, Thomas Mangin =
<thomas.mangin@exa.net.uk <mailto:thomas.mangin@exa.net.uk>> wrote:
> Hello Everyone,
>=20
> I support the draft; and I therefore implemented it on ExaBGP master.
>=20
> I am will keep an eye on the discussion regarding the potential issue =
transiting messages with larger than 4k total attributes size could =
cause.=20
>=20
> I would have no objection myself on seeing an arbitrary limit on the =
Total Path Attribute set to prevent backward compatibility as the most =
likely quick win is going to be on packing more NLRI ATM.
>=20
> That said, I am not aware of any guideline in previous RFC to cover =
this issue and it is already possible to encounter this problem today. =
So while the draft make the issue more likely, it does not make things =
worse from a specification POV.
>=20
> I am therefore wondering if this should not be covered by another =
unrelated RFC as it can affect current speakers and is not specific to =
this draft.
>=20
> Sincerely,
>=20
> Thomas
>=20
>> On 12 Nov 2017, at 22:47, Susan Hares <shares@ndzh.com =
<mailto:shares@ndzh.com>> wrote:
>>=20
>> This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages =
(11/12 to 11/26).  Please note this draft has at least 2 =
implementations.    Please comment on whether you feel this draft is =
ready for publication.  =20
>> =20
>> Susan Hares=20
>> =20
>> PS =E2=80=93 the request for this WG LC is at:
>> https://www.ietf.org/mail-archive/web/idr/current/msg18801.html =
<https://www.ietf.org/mail-archive/web/idr/current/msg18801.html>
>> =20
>> =20
>> =20
>> =20
>> =20
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org <mailto:Idr@ietf.org>
>> https://www.ietf.org/mailman/listinfo/idr =
<https://www.ietf.org/mailman/listinfo/idr>
>=20
> _______________________________________________
> Idr mailing list
> Idr@ietf.org <mailto:Idr@ietf.org>
> https://www.ietf.org/mailman/listinfo/idr =
<https://www.ietf.org/mailman/listinfo/idr>
>=20
>=20


--Apple-Mail=_EA737ACE-CD15-4DA5-A18B-9AC9708824E9
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">Hello=
 Robert,<div class=3D""><br class=3D""></div><div class=3D"">As this is =
a capability, it is an option to be enabled per neighbour.</div><div =
class=3D""><br class=3D""></div><div class=3D"">I thought it made sense =
to give the user control of this option: one may not want to enable the =
feature - and therefore they should be able to do so IMHO.</div><div =
class=3D""><br class=3D""></div><div class=3D""><div class=3D"">
<div style=3D"color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-size-adjust: auto; =
-webkit-text-stroke-width: 0px;">Thomas</div></div><div style=3D"color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: normal; letter-spacing: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: =
0px;"><br class=3D""></div><div><blockquote type=3D"cite" class=3D""><div =
class=3D"">On 21 Nov 2017, at 14:22, Robert Raszuk &lt;<a =
href=3D"mailto:robert@raszuk.net" class=3D"">robert@raszuk.net</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><div =
dir=3D"ltr" class=3D""><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Hi =
Thomas,</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Great =
that you implemented it in ExaBGP. Is it on by default or do you need a =
global/per peer knob ?&nbsp;</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">- - =
-&nbsp;</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">As to =
your point that even today you may have the same problem ... well if you =
consider the problem to be interworking between peers when one is =
already receiving 4K update and want to add more stuff ... you are right =
it can fail today.&nbsp;</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">But =
this is not the main problem I am pointing out. The problem is that in =
the above case the local guy who is adding stuff to existing update will =
locally and immediately know that it failed.&nbsp;</div><div =
class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">In the =
new model it is nodes far far away who happily injected larger then 4K =
update messages will never know that their updates never made it through =
as they intended.</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">And =
since IDR and community failed to progress OPERATIONAL MSG in BGP =
providing a bit of a ops feedback between peers and perhaps beyond we =
are where we are.&nbsp;<a href=3D"https://goo.gl/JTpQDc" =
class=3D"">https://goo.gl/JTpQDc</a></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Best,</di=
v><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Robert.</=
div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div></div><div class=3D"gmail_extra"><br class=3D""><div =
class=3D"gmail_quote">On Tue, Nov 21, 2017 at 11:26 AM, Thomas Mangin =
<span dir=3D"ltr" class=3D"">&lt;<a =
href=3D"mailto:thomas.mangin@exa.net.uk" target=3D"_blank" =
class=3D"">thomas.mangin@exa.net.uk</a>&gt;</span> wrote:<br =
class=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div =
style=3D"word-wrap:break-word;line-break:after-white-space" =
class=3D""><div class=3D"">Hello Everyone,</div><div class=3D""><br =
class=3D""></div><div class=3D""><div class=3D"">I support the draft; =
and I therefore implemented it on ExaBGP master.</div><div class=3D""><br =
class=3D""></div><div class=3D"">I am will keep an eye on the discussion =
regarding the potential issue transiting messages with larger than 4k =
total attributes size could cause.&nbsp;</div><div class=3D""><br =
class=3D""></div><div class=3D"">I would have no objection myself on =
seeing an arbitrary limit on the Total Path Attribute set to prevent =
backward compatibility as the most likely quick win is going to be on =
packing more NLRI ATM.</div><div class=3D""><br class=3D""></div><div =
class=3D"">That said, I am not aware of any guideline in previous RFC to =
cover this issue and it is already possible to encounter this problem =
today. So while the draft make the issue more likely, it does not make =
things worse from a specification POV.</div><div class=3D""><br =
class=3D""></div><div class=3D"">I am therefore wondering if this should =
not be covered by another unrelated RFC as it can affect current =
speakers and is not specific to this draft.</div><div class=3D""><br =
class=3D""></div><div class=3D"">Sincerely,</div><div class=3D""><br =
class=3D""></div><div class=3D"">Thomas<br class=3D""><div class=3D"">
<div style=3D"font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: normal; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; word-spacing: 0px;" class=3D""><br =
class=3D""></div></div><div class=3D""><blockquote type=3D"cite" =
class=3D""><div class=3D""><div class=3D"h5"><div class=3D"">On 12 Nov =
2017, at 22:47, Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" =
target=3D"_blank" class=3D"">shares@ndzh.com</a>&gt; wrote:</div><br =
class=3D"m_6988495671839111146Apple-interchange-newline"></div></div><div =
class=3D""><div class=3D""><div class=3D"h5"><div =
class=3D"m_6988495671839111146WordSection1" =
style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-varia=
nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
ext-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><d=
iv style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D"">This =
begins a 2 week WG LC for draft-ietf-idr-bgp-extended-<wbr =
class=3D"">messages (11/12 to 11/26).&nbsp; Please note this draft has =
at least 2 implementations. &nbsp;&nbsp;&nbsp;Please comment on whether =
you feel this draft is ready for publication.&nbsp;&nbsp;<span =
class=3D"m_6988495671839111146Apple-converted-space">&nbsp;</span><u =
class=3D""></u><u class=3D""></u></div><div style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div><div style=3D"margin:0in =
0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" =
class=3D"">Susan Hares<span =
class=3D"m_6988495671839111146Apple-converted-space">&nbsp;</span><u =
class=3D""></u><u class=3D""></u></div><div style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div><div style=3D"margin:0in =
0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D"">PS =
=E2=80=93 the request for this WG LC is at:<u class=3D""></u><u =
class=3D""></u></div><div style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><a =
href=3D"https://www.ietf.org/mail-archive/web/idr/current/msg18801.html" =
style=3D"color:purple;text-decoration:underline" target=3D"_blank" =
class=3D"">https://www.ietf.org/mail-<wbr =
class=3D"">archive/web/idr/current/<wbr class=3D"">msg18801.html</a><u =
class=3D""></u><u class=3D""></u></div><div style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div><div style=3D"margin:0in =
0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
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0in 0.0001pt;font-size:10pt;font-family:&quot;Courier New&quot;" =
class=3D""><span class=3D""> <u class=3D""></u><u =
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0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
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0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
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nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
ext-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;flo=
at:none;display:inline!important" =
class=3D"">______________________________<wbr =
class=3D"">_________________</span><br =
style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-varia=
nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
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nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
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class=3D""><a href=3D"mailto:Idr@ietf.org" =
style=3D"color:purple;text-decoration:underline;font-family:Helvetica;font=
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style=3D"color:purple;text-decoration:underline;font-family:Helvetica;font=
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class=3D""></div></div></div><br =
class=3D"">______________________________<wbr =
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Idr mailing list<br class=3D"">
<a href=3D"mailto:Idr@ietf.org" class=3D"">Idr@ietf.org</a><br class=3D"">=

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From: Robert Raszuk <robert@raszuk.net>
Date: Tue, 21 Nov 2017 16:03:32 +0100
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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My take would be to make it enabled by default (potentially with a knob to
disable it if needed) .. otherwise we are creating even worse swiss cheese
even among those implementations which do support it.

Thx,
R.

On Tue, Nov 21, 2017 at 3:56 PM, Thomas Mangin <thomas.mangin@exa.net.uk>
wrote:

> Hello Robert,
>
> As this is a capability, it is an option to be enabled per neighbour.
>
> I thought it made sense to give the user control of this option: one may
> not want to enable the feature - and therefore they should be able to do =
so
> IMHO.
>
> Thomas
>
> On 21 Nov 2017, at 14:22, Robert Raszuk <robert@raszuk.net> wrote:
>
> Hi Thomas,
>
> Great that you implemented it in ExaBGP. Is it on by default or do you
> need a global/per peer knob ?
>
> - - -
>
> As to your point that even today you may have the same problem ... well i=
f
> you consider the problem to be interworking between peers when one is
> already receiving 4K update and want to add more stuff ... you are right =
it
> can fail today.
>
> But this is not the main problem I am pointing out. The problem is that i=
n
> the above case the local guy who is adding stuff to existing update will
> locally and immediately know that it failed.
>
> In the new model it is nodes far far away who happily injected larger the=
n
> 4K update messages will never know that their updates never made it throu=
gh
> as they intended.
>
> And since IDR and community failed to progress OPERATIONAL MSG in BGP
> providing a bit of a ops feedback between peers and perhaps beyond we are
> where we are. https://goo.gl/JTpQDc
>
> Best,
> Robert.
>
>
> On Tue, Nov 21, 2017 at 11:26 AM, Thomas Mangin <thomas.mangin@exa.net.uk=
>
> wrote:
>
>> Hello Everyone,
>>
>> I support the draft; and I therefore implemented it on ExaBGP master.
>>
>> I am will keep an eye on the discussion regarding the potential issue
>> transiting messages with larger than 4k total attributes size could caus=
e.
>>
>> I would have no objection myself on seeing an arbitrary limit on the
>> Total Path Attribute set to prevent backward compatibility as the most
>> likely quick win is going to be on packing more NLRI ATM.
>>
>> That said, I am not aware of any guideline in previous RFC to cover this
>> issue and it is already possible to encounter this problem today. So whi=
le
>> the draft make the issue more likely, it does not make things worse from=
 a
>> specification POV.
>>
>> I am therefore wondering if this should not be covered by another
>> unrelated RFC as it can affect current speakers and is not specific to t=
his
>> draft.
>>
>> Sincerely,
>>
>> Thomas
>>
>> On 12 Nov 2017, at 22:47, Susan Hares <shares@ndzh.com> wrote:
>>
>> This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages
>> (11/12 to 11/26).  Please note this draft has at least 2 implementations=
.
>>    Please comment on whether you feel this draft is ready for publicatio=
n.
>>
>>
>> Susan Hares
>>
>> PS =E2=80=93 the request for this WG LC is at:
>> https://www.ietf.org/mail-archive/web/idr/current/msg18801.html
>>
>>
>>
>>
>>
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org
>> https://www.ietf.org/mailman/listinfo/idr
>>
>>
>>
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org
>> https://www.ietf.org/mailman/listinfo/idr
>>
>>
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">My take wo=
uld be to make it enabled by default (potentially with a knob to disable it=
 if needed) .. otherwise we are creating even worse swiss cheese even among=
 those implementations which do support it.=C2=A0</div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><=
br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small">Thx,</div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small">R.</div></div><div=
 class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue, Nov 21, 2017 =
at 3:56 PM, Thomas Mangin <span dir=3D"ltr">&lt;<a href=3D"mailto:thomas.ma=
ngin@exa.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;</span> =
wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bord=
er-left:1px #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word=
;line-break:after-white-space">Hello Robert,<div><br></div><div>As this is =
a capability, it is an option to be enabled per neighbour.</div><div><br></=
div><div>I thought it made sense to give the user control of this option: o=
ne may not want to enable the feature - and therefore they should be able t=
o do so IMHO.</div><span class=3D"HOEnZb"><font color=3D"#888888"><div><br>=
</div></font></span><div><span class=3D"HOEnZb"><font color=3D"#888888"><di=
v>
<div style=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-st=
yle:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:norma=
l;text-align:start;text-indent:0px;text-transform:none;white-space:normal;w=
ord-spacing:0px">Thomas</div></div></font></span><div><div class=3D"h5"><di=
v style=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-style=
:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;t=
ext-align:start;text-indent:0px;text-transform:none;white-space:normal;word=
-spacing:0px"><br></div><div><blockquote type=3D"cite"><div>On 21 Nov 2017,=
 at 14:22, Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D=
"_blank">robert@raszuk.net</a>&gt; wrote:</div><br class=3D"m_4304889594927=
04421Apple-interchange-newline"><div><div dir=3D"ltr"><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Hi=
 Thomas,</div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" sty=
le=3D"font-family:arial,helvetica,sans-serif;font-size:small">Great that yo=
u implemented it in ExaBGP. Is it on by default or do you need a global/per=
 peer knob ?=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:a=
rial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_de=
fault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">- -=
 -=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" sty=
le=3D"font-family:arial,helvetica,sans-serif;font-size:small">As to your po=
int that even today you may have the same problem ... well if you consider =
the problem to be interworking between peers when one is already receiving =
4K update and want to add more stuff ... you are right it can fail today.=
=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">But this is not=
 the main problem I am pointing out. The problem is that in the above case =
the local guy who is adding stuff to existing update will locally and immed=
iately know that it failed.=C2=A0</div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">In the new model it is nodes far far away who happily injecte=
d larger then 4K update messages will never know that their updates never m=
ade it through as they intended.</div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div cla=
ss=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small">And since IDR and community failed to progress OPERATIONAL MSG i=
n BGP providing a bit of a ops feedback between peers and perhaps beyond we=
 are where we are.=C2=A0<a href=3D"https://goo.gl/JTpQDc" target=3D"_blank"=
>https://goo.gl/JTpQDc</a></div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"=
gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sm=
all">Best,</div><div class=3D"gmail_default" style=3D"font-family:arial,hel=
vetica,sans-serif;font-size:small">Robert.</div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></di=
v></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue, N=
ov 21, 2017 at 11:26 AM, Thomas Mangin <span dir=3D"ltr">&lt;<a href=3D"mai=
lto:thomas.mangin@exa.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a=
>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 =
0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style=3D"word-wr=
ap:break-word;line-break:after-white-space"><div>Hello Everyone,</div><div>=
<br></div><div><div>I support the draft; and I therefore implemented it on =
ExaBGP master.</div><div><br></div><div>I am will keep an eye on the discus=
sion regarding the potential issue transiting messages with larger than 4k =
total attributes size could cause.=C2=A0</div><div><br></div><div>I would h=
ave no objection myself on seeing an arbitrary limit on the Total Path Attr=
ibute set to prevent backward compatibility as the most likely quick win is=
 going to be on packing more NLRI ATM.</div><div><br></div><div>That said, =
I am not aware of any guideline in previous RFC to cover this issue and it =
is already possible to encounter this problem today. So while the draft mak=
e the issue more likely, it does not make things worse from a specification=
 POV.</div><div><br></div><div>I am therefore wondering if this should not =
be covered by another unrelated RFC as it can affect current speakers and i=
s not specific to this draft.</div><div><br></div><div>Sincerely,</div><div=
><br></div><div>Thomas<br><div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">=
<br></div></div><div><blockquote type=3D"cite"><div><div class=3D"m_4304889=
59492704421h5"><div>On 12 Nov 2017, at 22:47, Susan Hares &lt;<a href=3D"ma=
ilto:shares@ndzh.com" target=3D"_blank">shares@ndzh.com</a>&gt; wrote:</div=
><br class=3D"m_430488959492704421m_6988495671839111146Apple-interchange-ne=
wline"></div></div><div><div><div class=3D"m_430488959492704421h5"><div cla=
ss=3D"m_430488959492704421m_6988495671839111146WordSection1" style=3D"font-=
family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;=
font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;t=
ext-transform:none;white-space:normal;word-spacing:0px"><div style=3D"margi=
n:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">This begi=
ns a 2 week WG LC for draft-ietf-idr-bgp-extended-me<wbr>ssages (11/12 to 1=
1/26).=C2=A0 Please note this draft has at least 2 implementations. =C2=A0=
=C2=A0=C2=A0Please comment on whether you feel this draft is ready for publ=
ication.=C2=A0=C2=A0<span class=3D"m_430488959492704421m_698849567183911114=
6Apple-converted-space">=C2=A0</span><u></u><u></u></div><div style=3D"marg=
in:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><u></u>=
=C2=A0<u></u></div><div style=3D"margin:0in 0in 0.0001pt;font-size:11pt;fon=
t-family:Calibri,sans-serif">Susan Hares<span class=3D"m_430488959492704421=
m_6988495671839111146Apple-converted-space">=C2=A0</span><u></u><u></u></di=
v><div style=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,=
sans-serif"><u></u>=C2=A0<u></u></div><div style=3D"margin:0in 0in 0.0001pt=
;font-size:11pt;font-family:Calibri,sans-serif">PS =E2=80=93 the request fo=
r this WG LC is at:<u></u><u></u></div><div style=3D"margin:0in 0in 0.0001p=
t;font-size:11pt;font-family:Calibri,sans-serif"><a href=3D"https://www.iet=
f.org/mail-archive/web/idr/current/msg18801.html" style=3D"color:purple;tex=
t-decoration:underline" target=3D"_blank">https://www.ietf.org/mail-arch<wb=
r>ive/web/idr/current/msg18801.<wbr>html</a><u></u><u></u></div><div style=
=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">=
<u></u>=C2=A0<u></u></div><div style=3D"margin:0in 0in 0.0001pt;font-size:1=
1pt;font-family:Calibri,sans-serif"><u></u>=C2=A0<u></u></div><pre style=3D=
"margin:0in 0in 0.0001pt;font-size:10pt;font-family:&quot;Courier New&quot;=
"><span> <u></u><u></u></span></pre><div style=3D"margin:0in 0in 0.0001pt;f=
ont-size:11pt;font-family:Calibri,sans-serif"><u></u>=C2=A0<u></u></div><di=
v style=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-=
serif"><u></u>=C2=A0<u></u></div></div></div></div><span><span style=3D"fon=
t-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:norma=
l;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px=
;text-transform:none;white-space:normal;word-spacing:0px;float:none;display=
:inline!important">______________________________<wbr>_________________</sp=
an><br style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font=
-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:st=
art;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px=
"><span style=3D"font-family:Helvetica;font-size:12px;font-style:normal;fon=
t-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:s=
tart;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0p=
x;float:none;display:inline!important">Idr mailing list</span><br style=3D"=
font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:no=
rmal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:=
0px;text-transform:none;white-space:normal;word-spacing:0px"><a href=3D"mai=
lto:Idr@ietf.org" style=3D"color:purple;text-decoration:underline;font-fami=
ly:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font=
-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-=
transform:none;white-space:normal;word-spacing:0px" target=3D"_blank">Idr@i=
etf.org</a><br style=3D"font-family:Helvetica;font-size:12px;font-style:nor=
mal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-=
align:start;text-indent:0px;text-transform:none;white-space:normal;word-spa=
cing:0px"><a href=3D"https://www.ietf.org/mailman/listinfo/idr" style=3D"co=
lor:purple;text-decoration:underline;font-family:Helvetica;font-size:12px;f=
ont-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing=
:normal;text-align:start;text-indent:0px;text-transform:none;white-space:no=
rmal;word-spacing:0px" target=3D"_blank">https://www.ietf.org/mailman/l<wbr=
>istinfo/idr</a></span></div></blockquote></div><br></div></div></div><br>_=
_____________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/l<wbr>istinfo/idr</a><br>
<br></blockquote></div><br></div>
</div></blockquote></div><br></div></div></div></div></blockquote></div><br=
></div>

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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Hello Robert,

> But this is not the main problem I am pointing out. The problem is =
that in the above case the local guy who is adding stuff to existing =
update will locally and immediately know that it failed.=20

I understand this is the same transitive issue we saw with ASN4 in the =
past where the failure is occurring a few routers away.=20

That said should I send a peer an update of exactly 4096 bytes, how =
would they propagate it to its peers / transit and prepend their own ASN =
without breaking their session ? So I think that the issue is still not =
limited to this draft.

As the behaviour can happen without the draft - to be honest my own code =
suffers from this bug and I will be fixing it today -  it would cause =
the same remote flapping as seen with ASN.

This case is not covered by RFC 7606 for =E2=80=9Cthread-as-withdraw=E2=80=
=9D ? Perhaps time for some code audit by everyone ...

> And since IDR and community failed to progress OPERATIONAL MSG in BGP =
providing a bit of a ops feedback between peers and perhaps beyond we =
are where we are. https://goo.gl/JTpQDc <https://goo.gl/JTpQDc>
I agree that having way to share implementation limitation (like max rib =
size, etc.) is something that should perhaps be discussed again ..=20
Different thread for a different day :-)

Thomas


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">Hello=
 Robert,<div class=3D""><br class=3D""></div><div =
class=3D""><div><blockquote type=3D"cite" class=3D""><div dir=3D"ltr" =
class=3D""><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">But =
this is not the main problem I am pointing out. The problem is that in =
the above case the local guy who is adding stuff to existing update will =
locally and immediately know that it =
failed.&nbsp;</div></div></blockquote><div><br class=3D""></div>I =
understand this is the same transitive issue we saw with ASN4 in the =
past where the failure is occurring a few routers =
away.&nbsp;</div><div><br class=3D""></div><div>That said should I send =
a peer an update of exactly 4096 bytes, how would they propagate it to =
its peers / transit and prepend their own ASN without breaking their =
session ? So I think that the issue is still not limited to this =
draft.</div><div><br class=3D""></div><div>As the behaviour can happen =
without the draft - to be honest my own code suffers from this bug and I =
will be fixing it today - &nbsp;it would cause the same remote flapping =
as seen with ASN.</div><div><br class=3D""></div><div><div>This case is =
not covered by&nbsp;RFC 7606 for =E2=80=9Cthread-as-withdraw=E2=80=9D ? =
Perhaps time for some code audit by everyone ...</div><div><br =
class=3D""></div></div><div><blockquote type=3D"cite" class=3D""><div =
dir=3D"ltr" class=3D""><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">And =
since IDR and community failed to progress OPERATIONAL MSG in BGP =
providing a bit of a ops feedback between peers and perhaps beyond we =
are where we are.&nbsp;<a href=3D"https://goo.gl/JTpQDc" =
class=3D"">https://goo.gl/JTpQDc</a></div></div></blockquote></div><br =
class=3D""></div><div class=3D"">I agree that having way to share =
implementation limitation (like max rib size, etc.) is something that =
should perhaps be discussed again ..&nbsp;</div><div class=3D"">Different =
thread for a different day :-)</div><div class=3D""><br =
class=3D""></div><div class=3D"">Thomas</div><div class=3D""><br =
class=3D""></div></body></html>=

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From nobody Tue Nov 21 07:22:02 2017
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Your wish is my command: done !
=
https://github.com/Exa-Networks/exabgp/commit/80612f0cef940d8f8b03b16f543c=
9173615188c5 =
<https://github.com/Exa-Networks/exabgp/commit/80612f0cef940d8f8b03b16f543=
c9173615188c5>

Thomas

> On 21 Nov 2017, at 15:03, Robert Raszuk <robert@raszuk.net> wrote:
>=20
>=20
> My take would be to make it enabled by default (potentially with a =
knob to disable it if needed) .. otherwise we are creating even worse =
swiss cheese even among those implementations which do support it.=20
>=20
> Thx,
> R.
>=20
> On Tue, Nov 21, 2017 at 3:56 PM, Thomas Mangin =
<thomas.mangin@exa.net.uk <mailto:thomas.mangin@exa.net.uk>> wrote:
> Hello Robert,
>=20
> As this is a capability, it is an option to be enabled per neighbour.
>=20
> I thought it made sense to give the user control of this option: one =
may not want to enable the feature - and therefore they should be able =
to do so IMHO.
>=20
> Thomas
>=20
>> On 21 Nov 2017, at 14:22, Robert Raszuk <robert@raszuk.net =
<mailto:robert@raszuk.net>> wrote:
>>=20
>> Hi Thomas,
>>=20
>> Great that you implemented it in ExaBGP. Is it on by default or do =
you need a global/per peer knob ?=20
>>=20
>> - - -=20
>>=20
>> As to your point that even today you may have the same problem ... =
well if you consider the problem to be interworking between peers when =
one is already receiving 4K update and want to add more stuff ... you =
are right it can fail today.=20
>>=20
>> But this is not the main problem I am pointing out. The problem is =
that in the above case the local guy who is adding stuff to existing =
update will locally and immediately know that it failed.=20
>>=20
>> In the new model it is nodes far far away who happily injected larger =
then 4K update messages will never know that their updates never made it =
through as they intended.
>>=20
>> And since IDR and community failed to progress OPERATIONAL MSG in BGP =
providing a bit of a ops feedback between peers and perhaps beyond we =
are where we are. https://goo.gl/JTpQDc <https://goo.gl/JTpQDc>
>>=20
>> Best,
>> Robert.
>>=20
>>=20
>> On Tue, Nov 21, 2017 at 11:26 AM, Thomas Mangin =
<thomas.mangin@exa.net.uk <mailto:thomas.mangin@exa.net.uk>> wrote:
>> Hello Everyone,
>>=20
>> I support the draft; and I therefore implemented it on ExaBGP master.
>>=20
>> I am will keep an eye on the discussion regarding the potential issue =
transiting messages with larger than 4k total attributes size could =
cause.=20
>>=20
>> I would have no objection myself on seeing an arbitrary limit on the =
Total Path Attribute set to prevent backward compatibility as the most =
likely quick win is going to be on packing more NLRI ATM.
>>=20
>> That said, I am not aware of any guideline in previous RFC to cover =
this issue and it is already possible to encounter this problem today. =
So while the draft make the issue more likely, it does not make things =
worse from a specification POV.
>>=20
>> I am therefore wondering if this should not be covered by another =
unrelated RFC as it can affect current speakers and is not specific to =
this draft.
>>=20
>> Sincerely,
>>=20
>> Thomas
>>=20
>>> On 12 Nov 2017, at 22:47, Susan Hares <shares@ndzh.com =
<mailto:shares@ndzh.com>> wrote:
>>>=20
>>> This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages =
(11/12 to 11/26).  Please note this draft has at least 2 =
implementations.    Please comment on whether you feel this draft is =
ready for publication.  =20
>>> =20
>>> Susan Hares=20
>>> =20
>>> PS =E2=80=93 the request for this WG LC is at:
>>> https://www.ietf.org/mail-archive/web/idr/current/msg18801.html =
<https://www.ietf.org/mail-archive/web/idr/current/msg18801.html>
>>> =20
>>> =20
>>> =20
>>> =20
>>> =20
>>> _______________________________________________
>>> Idr mailing list
>>> Idr@ietf.org <mailto:Idr@ietf.org>
>>> https://www.ietf.org/mailman/listinfo/idr =
<https://www.ietf.org/mailman/listinfo/idr>
>>=20
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org <mailto:Idr@ietf.org>
>> https://www.ietf.org/mailman/listinfo/idr =
<https://www.ietf.org/mailman/listinfo/idr>
>>=20
>>=20
>=20
>=20
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr


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-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">Your =
wish is my command: done !<div class=3D""><a =
href=3D"https://github.com/Exa-Networks/exabgp/commit/80612f0cef940d8f8b03=
b16f543c9173615188c5" =
class=3D"">https://github.com/Exa-Networks/exabgp/commit/80612f0cef940d8f8=
b03b16f543c9173615188c5</a><br class=3D""><div class=3D""><br =
class=3D""></div><div class=3D"">
<div style=3D"color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: =
auto; word-spacing: 0px; -webkit-text-size-adjust: auto; =
-webkit-text-stroke-width: 0px;">Thomas</div></div><div style=3D"color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: normal; letter-spacing: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: =
0px;"><br class=3D""></div><div style=3D""><blockquote type=3D"cite" =
class=3D""><div class=3D"">On 21 Nov 2017, at 15:03, Robert Raszuk =
&lt;<a href=3D"mailto:robert@raszuk.net" =
class=3D"">robert@raszuk.net</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div dir=3D"ltr" =
class=3D""><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">My take =
would be to make it enabled by default (potentially with a knob to =
disable it if needed) .. otherwise we are creating even worse swiss =
cheese even among those implementations which do support =
it.&nbsp;</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Thx,</div=
><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">R.</div><=
/div><div class=3D"gmail_extra"><br class=3D""><div =
class=3D"gmail_quote">On Tue, Nov 21, 2017 at 3:56 PM, Thomas Mangin =
<span dir=3D"ltr" class=3D"">&lt;<a =
href=3D"mailto:thomas.mangin@exa.net.uk" target=3D"_blank" =
class=3D"">thomas.mangin@exa.net.uk</a>&gt;</span> wrote:<br =
class=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div =
style=3D"word-wrap:break-word;line-break:after-white-space" =
class=3D"">Hello Robert,<div class=3D""><br class=3D""></div><div =
class=3D"">As this is a capability, it is an option to be enabled per =
neighbour.</div><div class=3D""><br class=3D""></div><div class=3D"">I =
thought it made sense to give the user control of this option: one may =
not want to enable the feature - and therefore they should be able to do =
so IMHO.</div><span class=3D"HOEnZb"><font color=3D"#888888" =
class=3D""><div class=3D""><br class=3D""></div></font></span><div =
class=3D""><span class=3D"HOEnZb"><font color=3D"#888888" class=3D""><div =
class=3D"">
<div style=3D"font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: normal; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; word-spacing: 0px;" =
class=3D"">Thomas</div></div></font></span><div class=3D""><div =
class=3D"h5"><div style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px;" =
class=3D""><br class=3D""></div><div class=3D""><blockquote type=3D"cite" =
class=3D""><div class=3D"">On 21 Nov 2017, at 14:22, Robert Raszuk =
&lt;<a href=3D"mailto:robert@raszuk.net" target=3D"_blank" =
class=3D"">robert@raszuk.net</a>&gt; wrote:</div><br =
class=3D"m_430488959492704421Apple-interchange-newline"><div =
class=3D""><div dir=3D"ltr" class=3D""><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Hi =
Thomas,</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Great =
that you implemented it in ExaBGP. Is it on by default or do you need a =
global/per peer knob ?&nbsp;</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">- - =
-&nbsp;</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">As to =
your point that even today you may have the same problem ... well if you =
consider the problem to be interworking between peers when one is =
already receiving 4K update and want to add more stuff ... you are right =
it can fail today.&nbsp;</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">But =
this is not the main problem I am pointing out. The problem is that in =
the above case the local guy who is adding stuff to existing update will =
locally and immediately know that it failed.&nbsp;</div><div =
class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">In the =
new model it is nodes far far away who happily injected larger then 4K =
update messages will never know that their updates never made it through =
as they intended.</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">And =
since IDR and community failed to progress OPERATIONAL MSG in BGP =
providing a bit of a ops feedback between peers and perhaps beyond we =
are where we are.&nbsp;<a href=3D"https://goo.gl/JTpQDc" target=3D"_blank"=
 class=3D"">https://goo.gl/JTpQDc</a></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Best,</di=
v><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Robert.</=
div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div></div><div class=3D"gmail_extra"><br class=3D""><div =
class=3D"gmail_quote">On Tue, Nov 21, 2017 at 11:26 AM, Thomas Mangin =
<span dir=3D"ltr" class=3D"">&lt;<a =
href=3D"mailto:thomas.mangin@exa.net.uk" target=3D"_blank" =
class=3D"">thomas.mangin@exa.net.uk</a>&gt;</span> wrote:<br =
class=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div =
style=3D"word-wrap:break-word;line-break:after-white-space" =
class=3D""><div class=3D"">Hello Everyone,</div><div class=3D""><br =
class=3D""></div><div class=3D""><div class=3D"">I support the draft; =
and I therefore implemented it on ExaBGP master.</div><div class=3D""><br =
class=3D""></div><div class=3D"">I am will keep an eye on the discussion =
regarding the potential issue transiting messages with larger than 4k =
total attributes size could cause.&nbsp;</div><div class=3D""><br =
class=3D""></div><div class=3D"">I would have no objection myself on =
seeing an arbitrary limit on the Total Path Attribute set to prevent =
backward compatibility as the most likely quick win is going to be on =
packing more NLRI ATM.</div><div class=3D""><br class=3D""></div><div =
class=3D"">That said, I am not aware of any guideline in previous RFC to =
cover this issue and it is already possible to encounter this problem =
today. So while the draft make the issue more likely, it does not make =
things worse from a specification POV.</div><div class=3D""><br =
class=3D""></div><div class=3D"">I am therefore wondering if this should =
not be covered by another unrelated RFC as it can affect current =
speakers and is not specific to this draft.</div><div class=3D""><br =
class=3D""></div><div class=3D"">Sincerely,</div><div class=3D""><br =
class=3D""></div><div class=3D"">Thomas<br class=3D""><div class=3D"">
<div =
style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-varia=
nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
ext-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" =
class=3D""><br class=3D""></div></div><div class=3D""><blockquote =
type=3D"cite" class=3D""><div class=3D""><div =
class=3D"m_430488959492704421h5"><div class=3D"">On 12 Nov 2017, at =
22:47, Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" =
target=3D"_blank" class=3D"">shares@ndzh.com</a>&gt; wrote:</div><br =
class=3D"m_430488959492704421m_6988495671839111146Apple-interchange-newlin=
e"></div></div><div class=3D""><div class=3D""><div =
class=3D"m_430488959492704421h5"><div =
class=3D"m_430488959492704421m_6988495671839111146WordSection1" =
style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-varia=
nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
ext-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><d=
iv style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D"">This =
begins a 2 week WG LC for draft-ietf-idr-bgp-extended-me<wbr =
class=3D"">ssages (11/12 to 11/26).&nbsp; Please note this draft has at =
least 2 implementations. &nbsp;&nbsp;&nbsp;Please comment on whether you =
feel this draft is ready for publication.&nbsp;&nbsp;<span =
class=3D"m_430488959492704421m_6988495671839111146Apple-converted-space">&=
nbsp;</span><u class=3D""></u><u class=3D""></u></div><div =
style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div><div style=3D"margin:0in =
0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" =
class=3D"">Susan Hares<span =
class=3D"m_430488959492704421m_6988495671839111146Apple-converted-space">&=
nbsp;</span><u class=3D""></u><u class=3D""></u></div><div =
style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div><div style=3D"margin:0in =
0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D"">PS =
=E2=80=93 the request for this WG LC is at:<u class=3D""></u><u =
class=3D""></u></div><div style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><a =
href=3D"https://www.ietf.org/mail-archive/web/idr/current/msg18801.html" =
style=3D"color:purple;text-decoration:underline" target=3D"_blank" =
class=3D"">https://www.ietf.org/mail-arch<wbr =
class=3D"">ive/web/idr/current/msg18801.<wbr class=3D"">html</a><u =
class=3D""></u><u class=3D""></u></div><div style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div><div style=3D"margin:0in =
0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div><pre style=3D"margin:0in =
0in 0.0001pt;font-size:10pt;font-family:&quot;Courier New&quot;" =
class=3D""><span class=3D""> <u class=3D""></u><u =
class=3D""></u></span></pre><div style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div><div style=3D"margin:0in =
0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div></div></div></div><span =
class=3D""><span =
style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-varia=
nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
ext-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;flo=
at:none;display:inline!important" =
class=3D"">______________________________<wbr =
class=3D"">_________________</span><br =
style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-varia=
nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
ext-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" =
class=3D""><span =
style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-varia=
nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
ext-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;flo=
at:none;display:inline!important" class=3D"">Idr mailing list</span><br =
style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-varia=
nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
ext-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" =
class=3D""><a href=3D"mailto:Idr@ietf.org" =
style=3D"color:purple;text-decoration:underline;font-family:Helvetica;font=
-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px" target=3D"_blank" =
class=3D"">Idr@ietf.org</a><br =
style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-varia=
nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
ext-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" =
class=3D""><a href=3D"https://www.ietf.org/mailman/listinfo/idr" =
style=3D"color:purple;text-decoration:underline;font-family:Helvetica;font=
-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;l=
etter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px" target=3D"_blank" =
class=3D"">https://www.ietf.org/mailman/l<wbr =
class=3D"">istinfo/idr</a></span></div></blockquote></div><br =
class=3D""></div></div></div><br =
class=3D"">______________________________<wbr =
class=3D"">_________________<br class=3D"">
Idr mailing list<br class=3D"">
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank" =
class=3D"">Idr@ietf.org</a><br class=3D"">
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" =
target=3D"_blank" class=3D"">https://www.ietf.org/mailman/l<wbr =
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<br class=3D""></blockquote></div><br class=3D""></div>
</div></blockquote></div><br =
class=3D""></div></div></div></div></blockquote></div><br =
class=3D""></div>
_______________________________________________<br class=3D"">Idr =
mailing list<br class=3D""><a href=3D"mailto:Idr@ietf.org" =
class=3D"">Idr@ietf.org</a><br =
class=3D"">https://www.ietf.org/mailman/listinfo/idr<br =
class=3D""></div></blockquote></div><br class=3D""></div></body></html>=

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References: <000901d35c08$3f12d950$bd388bf0$@ndzh.com> <B61C3B8F-1168-4EB1-8D8E-88C4BF28B3AA@exa.net.uk> <CA+b+ER=1sHhAqhOc2VipzZMB+Zsxk8n+8cNUshkjPw_A9k9E-A@mail.gmail.com> <39049A8C-6D47-4251-AF87-342F68DDE8AE@exa.net.uk> <CA+b+ER=ANs15BEmRKeqneVHNcTSCsGDMVDQgFV4OucwPSWcLgw@mail.gmail.com> <7419B76F-AC12-4A8E-B2DF-95BBCDB7A5EB@exa.net.uk>
From: Robert Raszuk <robert@raszuk.net>
Date: Tue, 21 Nov 2017 16:25:25 +0100
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To: Thomas Mangin <thomas.mangin@exa.net.uk>
Cc: Idr <idr-bounces@ietf.org>, idr wg <idr@ietf.org>, idr-ads@ietf.org
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/6VKLpSr5jhOvQ2uQVFTkp2QJJtI>
Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Cool :)

Care to add ExaBGP to the wiki ?

https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-extended-implementat=
ions

Thx,
R.

On Tue, Nov 21, 2017 at 4:21 PM, Thomas Mangin <thomas.mangin@exa.net.uk>
wrote:

> Your wish is my command: done !
> https://github.com/Exa-Networks/exabgp/commit/
> 80612f0cef940d8f8b03b16f543c9173615188c5
>
>
> Thomas
>
> On 21 Nov 2017, at 15:03, Robert Raszuk <robert@raszuk.net> wrote:
>
>
> My take would be to make it enabled by default (potentially with a knob t=
o
> disable it if needed) .. otherwise we are creating even worse swiss chees=
e
> even among those implementations which do support it.
>
> Thx,
> R.
>
> On Tue, Nov 21, 2017 at 3:56 PM, Thomas Mangin <thomas.mangin@exa.net.uk>
> wrote:
>
>> Hello Robert,
>>
>> As this is a capability, it is an option to be enabled per neighbour.
>>
>> I thought it made sense to give the user control of this option: one may
>> not want to enable the feature - and therefore they should be able to do=
 so
>> IMHO.
>>
>> Thomas
>>
>> On 21 Nov 2017, at 14:22, Robert Raszuk <robert@raszuk.net> wrote:
>>
>> Hi Thomas,
>>
>> Great that you implemented it in ExaBGP. Is it on by default or do you
>> need a global/per peer knob ?
>>
>> - - -
>>
>> As to your point that even today you may have the same problem ... well
>> if you consider the problem to be interworking between peers when one is
>> already receiving 4K update and want to add more stuff ... you are right=
 it
>> can fail today.
>>
>> But this is not the main problem I am pointing out. The problem is that
>> in the above case the local guy who is adding stuff to existing update w=
ill
>> locally and immediately know that it failed.
>>
>> In the new model it is nodes far far away who happily injected larger
>> then 4K update messages will never know that their updates never made it
>> through as they intended.
>>
>> And since IDR and community failed to progress OPERATIONAL MSG in BGP
>> providing a bit of a ops feedback between peers and perhaps beyond we ar=
e
>> where we are. https://goo.gl/JTpQDc
>>
>> Best,
>> Robert.
>>
>>
>> On Tue, Nov 21, 2017 at 11:26 AM, Thomas Mangin <thomas.mangin@exa.net.u=
k
>> > wrote:
>>
>>> Hello Everyone,
>>>
>>> I support the draft; and I therefore implemented it on ExaBGP master.
>>>
>>> I am will keep an eye on the discussion regarding the potential issue
>>> transiting messages with larger than 4k total attributes size could cau=
se.
>>>
>>> I would have no objection myself on seeing an arbitrary limit on the
>>> Total Path Attribute set to prevent backward compatibility as the most
>>> likely quick win is going to be on packing more NLRI ATM.
>>>
>>> That said, I am not aware of any guideline in previous RFC to cover thi=
s
>>> issue and it is already possible to encounter this problem today. So wh=
ile
>>> the draft make the issue more likely, it does not make things worse fro=
m a
>>> specification POV.
>>>
>>> I am therefore wondering if this should not be covered by another
>>> unrelated RFC as it can affect current speakers and is not specific to =
this
>>> draft.
>>>
>>> Sincerely,
>>>
>>> Thomas
>>>
>>> On 12 Nov 2017, at 22:47, Susan Hares <shares@ndzh.com> wrote:
>>>
>>> This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages
>>> (11/12 to 11/26).  Please note this draft has at least 2 implementation=
s.
>>>    Please comment on whether you feel this draft is ready for publicati=
on.
>>>
>>>
>>> Susan Hares
>>>
>>> PS =E2=80=93 the request for this WG LC is at:
>>> https://www.ietf.org/mail-archive/web/idr/current/msg18801.html
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Idr mailing list
>>> Idr@ietf.org
>>> https://www.ietf.org/mailman/listinfo/idr
>>>
>>>
>>>
>>> _______________________________________________
>>> Idr mailing list
>>> Idr@ietf.org
>>> https://www.ietf.org/mailman/listinfo/idr
>>>
>>>
>>
>>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--94eb2c0d4376faa9d1055e7fcf10
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Cool :)=C2=A0</div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><=
br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small">Care to add ExaBGP to the wiki ?=C2=A0</div><di=
v class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;f=
ont-size:small"><br></div><div class=3D"gmail_default"><font face=3D"arial,=
 helvetica, sans-serif"><a href=3D"https://trac.ietf.org/trac/idr/wiki/draf=
t-ietf-idr-bgp-extended-implementations">https://trac.ietf.org/trac/idr/wik=
i/draft-ietf-idr-bgp-extended-implementations</a></font><br></div><div clas=
s=3D"gmail_default"><font face=3D"arial, helvetica, sans-serif"><br></font>=
</div><div class=3D"gmail_default"><font face=3D"arial, helvetica, sans-ser=
if">Thx,<br>R.</font></div></div><div class=3D"gmail_extra"><br><div class=
=3D"gmail_quote">On Tue, Nov 21, 2017 at 4:21 PM, Thomas Mangin <span dir=
=3D"ltr">&lt;<a href=3D"mailto:thomas.mangin@exa.net.uk" target=3D"_blank">=
thomas.mangin@exa.net.uk</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"><div style=3D"word-wrap:break-word;line-break:after-white-space">Your=
 wish is my command: done !<div><a href=3D"https://github.com/Exa-Networks/=
exabgp/commit/80612f0cef940d8f8b03b16f543c9173615188c5" target=3D"_blank">h=
ttps://github.com/Exa-<wbr>Networks/exabgp/commit/<wbr>80612f0cef940d8f8b03=
b16f543c91<wbr>73615188c5</a><div><div class=3D"h5"><br><div><br></div><div=
>
<div style=3D"color:rgb(0,0,0);font-family:Helvetica;font-size:12px;font-st=
yle:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:norma=
l;text-align:start;text-indent:0px;text-transform:none;white-space:normal;w=
ord-spacing:0px">Thomas</div></div><div style=3D"color:rgb(0,0,0);font-fami=
ly:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font=
-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-=
transform:none;white-space:normal;word-spacing:0px"><br></div><div><blockqu=
ote type=3D"cite"><div>On 21 Nov 2017, at 15:03, Robert Raszuk &lt;<a href=
=3D"mailto:robert@raszuk.net" target=3D"_blank">robert@raszuk.net</a>&gt; w=
rote:</div><br class=3D"m_-8448415829277468868Apple-interchange-newline"><d=
iv><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">My take=
 would be to make it enabled by default (potentially with a knob to disable=
 it if needed) .. otherwise we are creating even worse swiss cheese even am=
ong those implementations which do support it.=C2=A0</div><div class=3D"gma=
il_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small=
"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small">Thx,</div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">R.</div></div><=
div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue, Nov 21, 20=
17 at 3:56 PM, Thomas Mangin <span dir=3D"ltr">&lt;<a href=3D"mailto:thomas=
.mangin@exa.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;</spa=
n> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;b=
order-left:1px #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-w=
ord;line-break:after-white-space">Hello Robert,<div><br></div><div>As this =
is a capability, it is an option to be enabled per neighbour.</div><div><br=
></div><div>I thought it made sense to give the user control of this option=
: one may not want to enable the feature - and therefore they should be abl=
e to do so IMHO.</div><span class=3D"m_-8448415829277468868HOEnZb"><font co=
lor=3D"#888888"><div><br></div></font></span><div><span class=3D"m_-8448415=
829277468868HOEnZb"><font color=3D"#888888"><div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">=
Thomas</div></div></font></span><div><div class=3D"m_-8448415829277468868h5=
"><div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font=
-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:st=
art;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px=
"><br></div><div><blockquote type=3D"cite"><div>On 21 Nov 2017, at 14:22, R=
obert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D"_blank">rob=
ert@raszuk.net</a>&gt; wrote:</div><br class=3D"m_-8448415829277468868m_430=
488959492704421Apple-interchange-newline"><div><div dir=3D"ltr"><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">Hi Thomas,</div><div class=3D"gmail_default" style=3D"font-family:=
arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Gr=
eat that you implemented it in ExaBGP. Is it on by default or do you need a=
 global/per peer knob ?=C2=A0</div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">- - -=C2=A0</div><div class=3D"gmail_default" style=3D"font-family=
:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">A=
s to your point that even today you may have the same problem ... well if y=
ou consider the problem to be interworking between peers when one is alread=
y receiving 4K update and want to add more stuff ... you are right it can f=
ail today.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">But t=
his is not the main problem I am pointing out. The problem is that in the a=
bove case the local guy who is adding stuff to existing update will locally=
 and immediately know that it failed.=C2=A0</div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small">In the new model it is nodes far far away who happily=
 injected larger then 4K update messages will never know that their updates=
 never made it through as they intended.</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">And since IDR and community failed to progress OPERATION=
AL MSG in BGP providing a bit of a ops feedback between peers and perhaps b=
eyond we are where we are.=C2=A0<a href=3D"https://goo.gl/JTpQDc" target=3D=
"_blank">https://goo.gl/JTpQDc</a></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">Best,</div><div class=3D"gmail_default" style=3D"font-family:=
arial,helvetica,sans-serif;font-size:small">Robert.</div><div class=3D"gmai=
l_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"=
><br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">=
On Tue, Nov 21, 2017 at 11:26 AM, Thomas Mangin <span dir=3D"ltr">&lt;<a hr=
ef=3D"mailto:thomas.mangin@exa.net.uk" target=3D"_blank">thomas.mangin@exa.=
net.uk</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"=
margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style=
=3D"word-wrap:break-word;line-break:after-white-space"><div>Hello Everyone,=
</div><div><br></div><div><div>I support the draft; and I therefore impleme=
nted it on ExaBGP master.</div><div><br></div><div>I am will keep an eye on=
 the discussion regarding the potential issue transiting messages with larg=
er than 4k total attributes size could cause.=C2=A0</div><div><br></div><di=
v>I would have no objection myself on seeing an arbitrary limit on the Tota=
l Path Attribute set to prevent backward compatibility as the most likely q=
uick win is going to be on packing more NLRI ATM.</div><div><br></div><div>=
That said, I am not aware of any guideline in previous RFC to cover this is=
sue and it is already possible to encounter this problem today. So while th=
e draft make the issue more likely, it does not make things worse from a sp=
ecification POV.</div><div><br></div><div>I am therefore wondering if this =
should not be covered by another unrelated RFC as it can affect current spe=
akers and is not specific to this draft.</div><div><br></div><div>Sincerely=
,</div><div><br></div><div>Thomas<br><div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">=
<br></div></div><div><blockquote type=3D"cite"><div><div class=3D"m_-844841=
5829277468868m_430488959492704421h5"><div>On 12 Nov 2017, at 22:47, Susan H=
ares &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@ndzh.c=
om</a>&gt; wrote:</div><br class=3D"m_-8448415829277468868m_430488959492704=
421m_6988495671839111146Apple-interchange-newline"></div></div><div><div><d=
iv class=3D"m_-8448415829277468868m_430488959492704421h5"><div class=3D"m_-=
8448415829277468868m_430488959492704421m_6988495671839111146WordSection1" s=
tyle=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-variant=
-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text=
-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><div s=
tyle=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-ser=
if">This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-me<wbr>ssage=
s (11/12 to 11/26).=C2=A0 Please note this draft has at least 2 implementat=
ions. =C2=A0=C2=A0=C2=A0Please comment on whether you feel this draft is re=
ady for publication.=C2=A0=C2=A0<span class=3D"m_-8448415829277468868m_4304=
88959492704421m_6988495671839111146Apple-converted-space">=C2=A0</span><u><=
/u><u></u></div><div style=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-f=
amily:Calibri,sans-serif"><u></u>=C2=A0<u></u></div><div style=3D"margin:0i=
n 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">Susan Hares<s=
pan class=3D"m_-8448415829277468868m_430488959492704421m_698849567183911114=
6Apple-converted-space">=C2=A0</span><u></u><u></u></div><div style=3D"marg=
in:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><u></u>=
=C2=A0<u></u></div><div style=3D"margin:0in 0in 0.0001pt;font-size:11pt;fon=
t-family:Calibri,sans-serif">PS =E2=80=93 the request for this WG LC is at:=
<u></u><u></u></div><div style=3D"margin:0in 0in 0.0001pt;font-size:11pt;fo=
nt-family:Calibri,sans-serif"><a href=3D"https://www.ietf.org/mail-archive/=
web/idr/current/msg18801.html" style=3D"color:purple;text-decoration:underl=
ine" target=3D"_blank">https://www.ietf.org/mail-arch<wbr>ive/web/idr/curre=
nt/msg18801.h<wbr>tml</a><u></u><u></u></div><div style=3D"margin:0in 0in 0=
.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><u></u>=C2=A0<u></u>=
</div><div style=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:Cali=
bri,sans-serif"><u></u>=C2=A0<u></u></div><pre style=3D"margin:0in 0in 0.00=
01pt;font-size:10pt;font-family:&quot;Courier New&quot;"><span> <u></u><u><=
/u></span></pre><div style=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-f=
amily:Calibri,sans-serif"><u></u>=C2=A0<u></u></div><div style=3D"margin:0i=
n 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><u></u>=C2=A0=
<u></u></div></div></div></div><span><span style=3D"font-family:Helvetica;f=
ont-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal=
;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none=
;white-space:normal;word-spacing:0px;float:none;display:inline!important">_=
_____________________________<wbr>_________________</span><br style=3D"font=
-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal=
;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;=
text-transform:none;white-space:normal;word-spacing:0px"><span style=3D"fon=
t-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:norma=
l;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px=
;text-transform:none;white-space:normal;word-spacing:0px;float:none;display=
:inline!important">Idr mailing list</span><br style=3D"font-family:Helvetic=
a;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:nor=
mal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:n=
one;white-space:normal;word-spacing:0px"><a href=3D"mailto:Idr@ietf.org" st=
yle=3D"color:purple;text-decoration:underline;font-family:Helvetica;font-si=
ze:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;lette=
r-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white=
-space:normal;word-spacing:0px" target=3D"_blank">Idr@ietf.org</a><br style=
=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-variant-cap=
s:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-ind=
ent:0px;text-transform:none;white-space:normal;word-spacing:0px"><a href=3D=
"https://www.ietf.org/mailman/listinfo/idr" style=3D"color:purple;text-deco=
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Robert,

I do not have a login

1	Yes
2	Yes
3	Yes
4a	Yes
4b	Yes
5a	You can send extended UPDATE . So No ?
5b	Yes

Thomas

> On 21 Nov 2017, at 15:25, Robert Raszuk <robert@raszuk.net> wrote:
>=20
> Cool :)=20
>=20
> Care to add ExaBGP to the wiki ?=20
>=20
> =
https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-extended-implementa=
tions =
<https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-extended-implement=
ations>
>=20
> Thx,
> R.
>=20
> On Tue, Nov 21, 2017 at 4:21 PM, Thomas Mangin =
<thomas.mangin@exa.net.uk <mailto:thomas.mangin@exa.net.uk>> wrote:
> Your wish is my command: done !
> =
https://github.com/Exa-Networks/exabgp/commit/80612f0cef940d8f8b03b16f543c=
9173615188c5 =
<https://github.com/Exa-Networks/exabgp/commit/80612f0cef940d8f8b03b16f543=
c9173615188c5>
>=20
>=20
> Thomas
>=20
>> On 21 Nov 2017, at 15:03, Robert Raszuk <robert@raszuk.net =
<mailto:robert@raszuk.net>> wrote:
>>=20
>>=20
>> My take would be to make it enabled by default (potentially with a =
knob to disable it if needed) .. otherwise we are creating even worse =
swiss cheese even among those implementations which do support it.=20
>>=20
>> Thx,
>> R.
>>=20
>> On Tue, Nov 21, 2017 at 3:56 PM, Thomas Mangin =
<thomas.mangin@exa.net.uk <mailto:thomas.mangin@exa.net.uk>> wrote:
>> Hello Robert,
>>=20
>> As this is a capability, it is an option to be enabled per neighbour.
>>=20
>> I thought it made sense to give the user control of this option: one =
may not want to enable the feature - and therefore they should be able =
to do so IMHO.
>>=20
>> Thomas
>>=20
>>> On 21 Nov 2017, at 14:22, Robert Raszuk <robert@raszuk.net =
<mailto:robert@raszuk.net>> wrote:
>>>=20
>>> Hi Thomas,
>>>=20
>>> Great that you implemented it in ExaBGP. Is it on by default or do =
you need a global/per peer knob ?=20
>>>=20
>>> - - -=20
>>>=20
>>> As to your point that even today you may have the same problem ... =
well if you consider the problem to be interworking between peers when =
one is already receiving 4K update and want to add more stuff ... you =
are right it can fail today.=20
>>>=20
>>> But this is not the main problem I am pointing out. The problem is =
that in the above case the local guy who is adding stuff to existing =
update will locally and immediately know that it failed.=20
>>>=20
>>> In the new model it is nodes far far away who happily injected =
larger then 4K update messages will never know that their updates never =
made it through as they intended.
>>>=20
>>> And since IDR and community failed to progress OPERATIONAL MSG in =
BGP providing a bit of a ops feedback between peers and perhaps beyond =
we are where we are. https://goo.gl/JTpQDc <https://goo.gl/JTpQDc>
>>>=20
>>> Best,
>>> Robert.
>>>=20
>>>=20
>>> On Tue, Nov 21, 2017 at 11:26 AM, Thomas Mangin =
<thomas.mangin@exa.net.uk <mailto:thomas.mangin@exa.net.uk>> wrote:
>>> Hello Everyone,
>>>=20
>>> I support the draft; and I therefore implemented it on ExaBGP =
master.
>>>=20
>>> I am will keep an eye on the discussion regarding the potential =
issue transiting messages with larger than 4k total attributes size =
could cause.=20
>>>=20
>>> I would have no objection myself on seeing an arbitrary limit on the =
Total Path Attribute set to prevent backward compatibility as the most =
likely quick win is going to be on packing more NLRI ATM.
>>>=20
>>> That said, I am not aware of any guideline in previous RFC to cover =
this issue and it is already possible to encounter this problem today. =
So while the draft make the issue more likely, it does not make things =
worse from a specification POV.
>>>=20
>>> I am therefore wondering if this should not be covered by another =
unrelated RFC as it can affect current speakers and is not specific to =
this draft.
>>>=20
>>> Sincerely,
>>>=20
>>> Thomas
>>>=20
>>>> On 12 Nov 2017, at 22:47, Susan Hares <shares@ndzh.com =
<mailto:shares@ndzh.com>> wrote:
>>>>=20
>>>> This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages =
(11/12 to 11/26).  Please note this draft has at least 2 =
implementations.    Please comment on whether you feel this draft is =
ready for publication.  =20
>>>> =20
>>>> Susan Hares=20
>>>> =20
>>>> PS =E2=80=93 the request for this WG LC is at:
>>>> https://www.ietf.org/mail-archive/web/idr/current/msg18801.html =
<https://www.ietf.org/mail-archive/web/idr/current/msg18801.html>
>>>> =20
>>>> =20
>>>> =20
>>>> =20
>>>> =20
>>>> _______________________________________________
>>>> Idr mailing list
>>>> Idr@ietf.org <mailto:Idr@ietf.org>
>>>> https://www.ietf.org/mailman/listinfo/idr =
<https://www.ietf.org/mailman/listinfo/idr>
>>>=20
>>> _______________________________________________
>>> Idr mailing list
>>> Idr@ietf.org <mailto:Idr@ietf.org>
>>> https://www.ietf.org/mailman/listinfo/idr =
<https://www.ietf.org/mailman/listinfo/idr>
>>>=20
>>>=20
>>=20
>>=20
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org <mailto:Idr@ietf.org>
>> https://www.ietf.org/mailman/listinfo/idr =
<https://www.ietf.org/mailman/listinfo/idr>
>=20
>=20
> _______________________________________________
> Idr mailing list
> Idr@ietf.org <mailto:Idr@ietf.org>
> https://www.ietf.org/mailman/listinfo/idr =
<https://www.ietf.org/mailman/listinfo/idr>
>=20
>=20
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" =
class=3D"">Robert,<div class=3D""><br class=3D""></div><div class=3D"">I =
do not have a login</div><div class=3D""><br class=3D""></div><div =
class=3D""><div class=3D"">1<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>Yes</div><div class=3D"">2<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span>Yes</div><div class=3D"">3<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>Yes</div><div class=3D"">4a<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span>Yes</div><div class=3D"">4b<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>Yes</div><div class=3D"">5a<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>You can =
send extended UPDATE . So No ?</div><div class=3D"">5b<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span>Yes</div><div class=3D""><br class=3D""></div><div =
class=3D"">Thomas</div><div class=3D""><br =
class=3D""></div><div><blockquote type=3D"cite" class=3D""><div =
class=3D"">On 21 Nov 2017, at 15:25, Robert Raszuk &lt;<a =
href=3D"mailto:robert@raszuk.net" class=3D"">robert@raszuk.net</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><div =
dir=3D"ltr" class=3D""><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Cool =
:)&nbsp;</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Care to =
add ExaBGP to the wiki ?&nbsp;</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default"><font face=3D"arial, =
helvetica, sans-serif" class=3D""><a =
href=3D"https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-extended-im=
plementations" =
class=3D"">https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-extended=
-implementations</a></font><br class=3D""></div><div =
class=3D"gmail_default"><font face=3D"arial, helvetica, sans-serif" =
class=3D""><br class=3D""></font></div><div class=3D"gmail_default"><font =
face=3D"arial, helvetica, sans-serif" class=3D"">Thx,<br =
class=3D"">R.</font></div></div><div class=3D"gmail_extra"><br =
class=3D""><div class=3D"gmail_quote">On Tue, Nov 21, 2017 at 4:21 PM, =
Thomas Mangin <span dir=3D"ltr" class=3D"">&lt;<a =
href=3D"mailto:thomas.mangin@exa.net.uk" target=3D"_blank" =
class=3D"">thomas.mangin@exa.net.uk</a>&gt;</span> wrote:<br =
class=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div =
style=3D"word-wrap:break-word;line-break:after-white-space" =
class=3D"">Your wish is my command: done !<div class=3D""><a =
href=3D"https://github.com/Exa-Networks/exabgp/commit/80612f0cef940d8f8b03=
b16f543c9173615188c5" target=3D"_blank" =
class=3D"">https://github.com/Exa-<wbr =
class=3D"">Networks/exabgp/commit/<wbr =
class=3D"">80612f0cef940d8f8b03b16f543c91<wbr =
class=3D"">73615188c5</a><div class=3D""><div class=3D"h5"><br =
class=3D""><div class=3D""><br class=3D""></div><div class=3D"">
<div style=3D"font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: normal; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; word-spacing: 0px;" class=3D"">Thomas</div></div><div=
 style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px;" class=3D""><br class=3D""></div><div =
class=3D""><blockquote type=3D"cite" class=3D""><div class=3D"">On 21 =
Nov 2017, at 15:03, Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net"=
 target=3D"_blank" class=3D"">robert@raszuk.net</a>&gt; wrote:</div><br =
class=3D"m_-8448415829277468868Apple-interchange-newline"><div =
class=3D""><div dir=3D"ltr" class=3D""><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">My take =
would be to make it enabled by default (potentially with a knob to =
disable it if needed) .. otherwise we are creating even worse swiss =
cheese even among those implementations which do support =
it.&nbsp;</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Thx,</div=
><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">R.</div><=
/div><div class=3D"gmail_extra"><br class=3D""><div =
class=3D"gmail_quote">On Tue, Nov 21, 2017 at 3:56 PM, Thomas Mangin =
<span dir=3D"ltr" class=3D"">&lt;<a =
href=3D"mailto:thomas.mangin@exa.net.uk" target=3D"_blank" =
class=3D"">thomas.mangin@exa.net.uk</a>&gt;</span> wrote:<br =
class=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div =
style=3D"word-wrap:break-word;line-break:after-white-space" =
class=3D"">Hello Robert,<div class=3D""><br class=3D""></div><div =
class=3D"">As this is a capability, it is an option to be enabled per =
neighbour.</div><div class=3D""><br class=3D""></div><div class=3D"">I =
thought it made sense to give the user control of this option: one may =
not want to enable the feature - and therefore they should be able to do =
so IMHO.</div><span class=3D"m_-8448415829277468868HOEnZb"><font =
color=3D"#888888" class=3D""><div class=3D""><br =
class=3D""></div></font></span><div class=3D""><span =
class=3D"m_-8448415829277468868HOEnZb"><font color=3D"#888888" =
class=3D""><div class=3D"">
<div =
style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-varia=
nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
ext-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" =
class=3D"">Thomas</div></div></font></span><div class=3D""><div =
class=3D"m_-8448415829277468868h5"><div =
style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-varia=
nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
ext-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" =
class=3D""><br class=3D""></div><div class=3D""><blockquote type=3D"cite" =
class=3D""><div class=3D"">On 21 Nov 2017, at 14:22, Robert Raszuk =
&lt;<a href=3D"mailto:robert@raszuk.net" target=3D"_blank" =
class=3D"">robert@raszuk.net</a>&gt; wrote:</div><br =
class=3D"m_-8448415829277468868m_430488959492704421Apple-interchange-newli=
ne"><div class=3D""><div dir=3D"ltr" class=3D""><div =
class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Hi =
Thomas,</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Great =
that you implemented it in ExaBGP. Is it on by default or do you need a =
global/per peer knob ?&nbsp;</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">- - =
-&nbsp;</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">As to =
your point that even today you may have the same problem ... well if you =
consider the problem to be interworking between peers when one is =
already receiving 4K update and want to add more stuff ... you are right =
it can fail today.&nbsp;</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">But =
this is not the main problem I am pointing out. The problem is that in =
the above case the local guy who is adding stuff to existing update will =
locally and immediately know that it failed.&nbsp;</div><div =
class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">In the =
new model it is nodes far far away who happily injected larger then 4K =
update messages will never know that their updates never made it through =
as they intended.</div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">And =
since IDR and community failed to progress OPERATIONAL MSG in BGP =
providing a bit of a ops feedback between peers and perhaps beyond we =
are where we are.&nbsp;<a href=3D"https://goo.gl/JTpQDc" target=3D"_blank"=
 class=3D"">https://goo.gl/JTpQDc</a></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Best,</di=
v><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Robert.</=
div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br =
class=3D""></div></div><div class=3D"gmail_extra"><br class=3D""><div =
class=3D"gmail_quote">On Tue, Nov 21, 2017 at 11:26 AM, Thomas Mangin =
<span dir=3D"ltr" class=3D"">&lt;<a =
href=3D"mailto:thomas.mangin@exa.net.uk" target=3D"_blank" =
class=3D"">thomas.mangin@exa.net.uk</a>&gt;</span> wrote:<br =
class=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div =
style=3D"word-wrap:break-word;line-break:after-white-space" =
class=3D""><div class=3D"">Hello Everyone,</div><div class=3D""><br =
class=3D""></div><div class=3D""><div class=3D"">I support the draft; =
and I therefore implemented it on ExaBGP master.</div><div class=3D""><br =
class=3D""></div><div class=3D"">I am will keep an eye on the discussion =
regarding the potential issue transiting messages with larger than 4k =
total attributes size could cause.&nbsp;</div><div class=3D""><br =
class=3D""></div><div class=3D"">I would have no objection myself on =
seeing an arbitrary limit on the Total Path Attribute set to prevent =
backward compatibility as the most likely quick win is going to be on =
packing more NLRI ATM.</div><div class=3D""><br class=3D""></div><div =
class=3D"">That said, I am not aware of any guideline in previous RFC to =
cover this issue and it is already possible to encounter this problem =
today. So while the draft make the issue more likely, it does not make =
things worse from a specification POV.</div><div class=3D""><br =
class=3D""></div><div class=3D"">I am therefore wondering if this should =
not be covered by another unrelated RFC as it can affect current =
speakers and is not specific to this draft.</div><div class=3D""><br =
class=3D""></div><div class=3D"">Sincerely,</div><div class=3D""><br =
class=3D""></div><div class=3D"">Thomas<br class=3D""><div class=3D"">
<div =
style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-varia=
nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
ext-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" =
class=3D""><br class=3D""></div></div><div class=3D""><blockquote =
type=3D"cite" class=3D""><div class=3D""><div =
class=3D"m_-8448415829277468868m_430488959492704421h5"><div class=3D"">On =
12 Nov 2017, at 22:47, Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" =
target=3D"_blank" class=3D"">shares@ndzh.com</a>&gt; wrote:</div><br =
class=3D"m_-8448415829277468868m_430488959492704421m_6988495671839111146Ap=
ple-interchange-newline"></div></div><div class=3D""><div class=3D""><div =
class=3D"m_-8448415829277468868m_430488959492704421h5"><div =
class=3D"m_-8448415829277468868m_430488959492704421m_6988495671839111146Wo=
rdSection1" =
style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-varia=
nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
ext-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><d=
iv style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D"">This =
begins a 2 week WG LC for draft-ietf-idr-bgp-extended-me<wbr =
class=3D"">ssages (11/12 to 11/26).&nbsp; Please note this draft has at =
least 2 implementations. &nbsp;&nbsp;&nbsp;Please comment on whether you =
feel this draft is ready for publication.&nbsp;&nbsp;<span =
class=3D"m_-8448415829277468868m_430488959492704421m_6988495671839111146Ap=
ple-converted-space">&nbsp;</span><u class=3D""></u><u =
class=3D""></u></div><div style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div><div style=3D"margin:0in =
0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" =
class=3D"">Susan Hares<span =
class=3D"m_-8448415829277468868m_430488959492704421m_6988495671839111146Ap=
ple-converted-space">&nbsp;</span><u class=3D""></u><u =
class=3D""></u></div><div style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div><div style=3D"margin:0in =
0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D"">PS =
=E2=80=93 the request for this WG LC is at:<u class=3D""></u><u =
class=3D""></u></div><div style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><a =
href=3D"https://www.ietf.org/mail-archive/web/idr/current/msg18801.html" =
style=3D"color:purple;text-decoration:underline" target=3D"_blank" =
class=3D"">https://www.ietf.org/mail-arch<wbr =
class=3D"">ive/web/idr/current/msg18801.h<wbr class=3D"">tml</a><u =
class=3D""></u><u class=3D""></u></div><div style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div><div style=3D"margin:0in =
0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div><pre style=3D"margin:0in =
0in 0.0001pt;font-size:10pt;font-family:&quot;Courier New&quot;" =
class=3D""><span class=3D""> <u class=3D""></u><u =
class=3D""></u></span></pre><div style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div><div style=3D"margin:0in =
0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif" class=3D""><u =
class=3D""></u>&nbsp;<u class=3D""></u></div></div></div></div><span =
class=3D""><span =
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at:none;display:inline!important" =
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class=3D""><span =
style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-varia=
nt-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;t=
ext-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;flo=
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______________________________<wbr class=3D"">_________________<br =
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Done ! I filled the report for you :).

5a is answering the question in 5 so I said Yes - Clearly if there is no
support no capability will be sent :) Confusing a bit ...

Cheers,
R.

On Tue, Nov 21, 2017 at 5:03 PM, Thomas Mangin <thomas.mangin@exa.net.uk>
wrote:

> Robert,
>
> I do not have a login
>
> 1 Yes
> 2 Yes
> 3 Yes
> 4a Yes
> 4b Yes
> 5a You can send extended UPDATE . So No ?
> 5b Yes
>
> Thomas
>
> On 21 Nov 2017, at 15:25, Robert Raszuk <robert@raszuk.net> wrote:
>
> Cool :)
>
> Care to add ExaBGP to the wiki ?
>
> https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-
> extended-implementations
>
> Thx,
> R.
>
> On Tue, Nov 21, 2017 at 4:21 PM, Thomas Mangin <thomas.mangin@exa.net.uk>
> wrote:
>
>> Your wish is my command: done !
>> https://github.com/Exa-Networks/exabgp/commit/80612f0cef940d
>> 8f8b03b16f543c9173615188c5
>>
>>
>> Thomas
>>
>> On 21 Nov 2017, at 15:03, Robert Raszuk <robert@raszuk.net> wrote:
>>
>>
>> My take would be to make it enabled by default (potentially with a knob
>> to disable it if needed) .. otherwise we are creating even worse swiss
>> cheese even among those implementations which do support it.
>>
>> Thx,
>> R.
>>
>> On Tue, Nov 21, 2017 at 3:56 PM, Thomas Mangin <thomas.mangin@exa.net.uk=
>
>> wrote:
>>
>>> Hello Robert,
>>>
>>> As this is a capability, it is an option to be enabled per neighbour.
>>>
>>> I thought it made sense to give the user control of this option: one ma=
y
>>> not want to enable the feature - and therefore they should be able to d=
o so
>>> IMHO.
>>>
>>> Thomas
>>>
>>> On 21 Nov 2017, at 14:22, Robert Raszuk <robert@raszuk.net> wrote:
>>>
>>> Hi Thomas,
>>>
>>> Great that you implemented it in ExaBGP. Is it on by default or do you
>>> need a global/per peer knob ?
>>>
>>> - - -
>>>
>>> As to your point that even today you may have the same problem ... well
>>> if you consider the problem to be interworking between peers when one i=
s
>>> already receiving 4K update and want to add more stuff ... you are righ=
t it
>>> can fail today.
>>>
>>> But this is not the main problem I am pointing out. The problem is that
>>> in the above case the local guy who is adding stuff to existing update =
will
>>> locally and immediately know that it failed.
>>>
>>> In the new model it is nodes far far away who happily injected larger
>>> then 4K update messages will never know that their updates never made i=
t
>>> through as they intended.
>>>
>>> And since IDR and community failed to progress OPERATIONAL MSG in BGP
>>> providing a bit of a ops feedback between peers and perhaps beyond we a=
re
>>> where we are. https://goo.gl/JTpQDc
>>>
>>> Best,
>>> Robert.
>>>
>>>
>>> On Tue, Nov 21, 2017 at 11:26 AM, Thomas Mangin <
>>> thomas.mangin@exa.net.uk> wrote:
>>>
>>>> Hello Everyone,
>>>>
>>>> I support the draft; and I therefore implemented it on ExaBGP master.
>>>>
>>>> I am will keep an eye on the discussion regarding the potential issue
>>>> transiting messages with larger than 4k total attributes size could ca=
use.
>>>>
>>>> I would have no objection myself on seeing an arbitrary limit on the
>>>> Total Path Attribute set to prevent backward compatibility as the most
>>>> likely quick win is going to be on packing more NLRI ATM.
>>>>
>>>> That said, I am not aware of any guideline in previous RFC to cover
>>>> this issue and it is already possible to encounter this problem today.=
 So
>>>> while the draft make the issue more likely, it does not make things wo=
rse
>>>> from a specification POV.
>>>>
>>>> I am therefore wondering if this should not be covered by another
>>>> unrelated RFC as it can affect current speakers and is not specific to=
 this
>>>> draft.
>>>>
>>>> Sincerely,
>>>>
>>>> Thomas
>>>>
>>>> On 12 Nov 2017, at 22:47, Susan Hares <shares@ndzh.com> wrote:
>>>>
>>>> This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-messages
>>>> (11/12 to 11/26).  Please note this draft has at least 2 implementatio=
ns.
>>>>    Please comment on whether you feel this draft is ready for publicat=
ion.
>>>>
>>>>
>>>> Susan Hares
>>>>
>>>> PS =E2=80=93 the request for this WG LC is at:
>>>> https://www.ietf.org/mail-archive/web/idr/current/msg18801.html
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Idr mailing list
>>>> Idr@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/idr
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Idr mailing list
>>>> Idr@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/idr
>>>>
>>>>
>>>
>>>
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org
>> https://www.ietf.org/mailman/listinfo/idr
>>
>>
>>
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org
>> https://www.ietf.org/mailman/listinfo/idr
>>
>>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--94eb2c06671a19d70a055e808775
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Done ! I f=
illed the report for you :).</div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">5a is answering the question in 5 so I said Yes - Clearly if there=
 is no support no capability will be sent :) Confusing a bit ...=C2=A0</div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-fa=
mily:arial,helvetica,sans-serif;font-size:small">Cheers,</div><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall">R.</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quot=
e">On Tue, Nov 21, 2017 at 5:03 PM, Thomas Mangin <span dir=3D"ltr">&lt;<a =
href=3D"mailto:thomas.mangin@exa.net.uk" target=3D"_blank">thomas.mangin@ex=
a.net.uk</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div sty=
le=3D"word-wrap:break-word;line-break:after-white-space">Robert,<div><br></=
div><div>I do not have a login</div><div><br></div><div><div>1<span class=
=3D"m_1465612020327863408Apple-tab-span" style=3D"white-space:pre-wrap">	</=
span>Yes</div><div>2<span class=3D"m_1465612020327863408Apple-tab-span" sty=
le=3D"white-space:pre-wrap">	</span>Yes</div><div>3<span class=3D"m_1465612=
020327863408Apple-tab-span" style=3D"white-space:pre-wrap">	</span>Yes</div=
><div>4a<span class=3D"m_1465612020327863408Apple-tab-span" style=3D"white-=
space:pre-wrap">	</span>Yes</div><div>4b<span class=3D"m_146561202032786340=
8Apple-tab-span" style=3D"white-space:pre-wrap">	</span>Yes</div><div>5a<sp=
an class=3D"m_1465612020327863408Apple-tab-span" style=3D"white-space:pre-w=
rap">	</span>You can send extended UPDATE . So No ?</div><div>5b<span class=
=3D"m_1465612020327863408Apple-tab-span" style=3D"white-space:pre-wrap">	</=
span>Yes</div><span class=3D"HOEnZb"><font color=3D"#888888"><div><br></div=
><div>Thomas</div></font></span><div><div class=3D"h5"><div><br></div><div>=
<blockquote type=3D"cite"><div>On 21 Nov 2017, at 15:25, Robert Raszuk &lt;=
<a href=3D"mailto:robert@raszuk.net" target=3D"_blank">robert@raszuk.net</a=
>&gt; wrote:</div><br class=3D"m_1465612020327863408Apple-interchange-newli=
ne"><div><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family=
:arial,helvetica,sans-serif;font-size:small">Cool :)=C2=A0</div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small">Care to add ExaBGP to the wiki ?=C2=
=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small"><br></div><div class=3D"gmail_default"><font fa=
ce=3D"arial, helvetica, sans-serif"><a href=3D"https://trac.ietf.org/trac/i=
dr/wiki/draft-ietf-idr-bgp-extended-implementations" target=3D"_blank">http=
s://trac.ietf.org/trac/<wbr>idr/wiki/draft-ietf-idr-bgp-<wbr>extended-imple=
mentations</a></font><br></div><div class=3D"gmail_default"><font face=3D"a=
rial, helvetica, sans-serif"><br></font></div><div class=3D"gmail_default">=
<font face=3D"arial, helvetica, sans-serif">Thx,<br>R.</font></div></div><d=
iv class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue, Nov 21, 201=
7 at 4:21 PM, Thomas Mangin <span dir=3D"ltr">&lt;<a href=3D"mailto:thomas.=
mangin@exa.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;</span=
> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bo=
rder-left:1px #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-wo=
rd;line-break:after-white-space">Your wish is my command: done !<div><a hre=
f=3D"https://github.com/Exa-Networks/exabgp/commit/80612f0cef940d8f8b03b16f=
543c9173615188c5" target=3D"_blank">https://github.com/Exa-Network<wbr>s/ex=
abgp/commit/80612f0cef940d<wbr>8f8b03b16f543c9173615188c5</a><div><div clas=
s=3D"m_1465612020327863408h5"><br><div><br></div><div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">=
Thomas</div></div><div style=3D"font-family:Helvetica;font-size:12px;font-s=
tyle:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:norm=
al;text-align:start;text-indent:0px;text-transform:none;white-space:normal;=
word-spacing:0px"><br></div><div><blockquote type=3D"cite"><div>On 21 Nov 2=
017, at 15:03, Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" targe=
t=3D"_blank">robert@raszuk.net</a>&gt; wrote:</div><br class=3D"m_146561202=
0327863408m_-8448415829277468868Apple-interchange-newline"><div><div dir=3D=
"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small">My take would be to m=
ake it enabled by default (potentially with a knob to disable it if needed)=
 .. otherwise we are creating even worse swiss cheese even among those impl=
ementations which do support it.=C2=A0</div><div class=3D"gmail_default" st=
yle=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><d=
iv class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;=
font-size:small">Thx,</div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small">R.</div></div><div class=3D"g=
mail_extra"><br><div class=3D"gmail_quote">On Tue, Nov 21, 2017 at 3:56 PM,=
 Thomas Mangin <span dir=3D"ltr">&lt;<a href=3D"mailto:thomas.mangin@exa.ne=
t.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;</span> wrote:<br><=
blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px=
 #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word;line-break=
:after-white-space">Hello Robert,<div><br></div><div>As this is a capabilit=
y, it is an option to be enabled per neighbour.</div><div><br></div><div>I =
thought it made sense to give the user control of this option: one may not =
want to enable the feature - and therefore they should be able to do so IMH=
O.</div><span class=3D"m_1465612020327863408m_-8448415829277468868HOEnZb"><=
font color=3D"#888888"><div><br></div></font></span><div><span class=3D"m_1=
465612020327863408m_-8448415829277468868HOEnZb"><font color=3D"#888888"><di=
v>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">=
Thomas</div></div></font></span><div><div class=3D"m_1465612020327863408m_-=
8448415829277468868h5"><div style=3D"font-family:Helvetica;font-size:12px;f=
ont-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing=
:normal;text-align:start;text-indent:0px;text-transform:none;white-space:no=
rmal;word-spacing:0px"><br></div><div><blockquote type=3D"cite"><div>On 21 =
Nov 2017, at 14:22, Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" =
target=3D"_blank">robert@raszuk.net</a>&gt; wrote:</div><br class=3D"m_1465=
612020327863408m_-8448415829277468868m_430488959492704421Apple-interchange-=
newline"><div><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-f=
amily:arial,helvetica,sans-serif;font-size:small">Hi Thomas,</div><div clas=
s=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-si=
ze:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small">Great that you implemented it in Exa=
BGP. Is it on by default or do you need a global/per peer knob ?=C2=A0</div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-fa=
mily:arial,helvetica,sans-serif;font-size:small">- - -=C2=A0</div><div clas=
s=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-si=
ze:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small">As to your point that even today you=
 may have the same problem ... well if you consider the problem to be inter=
working between peers when one is already receiving 4K update and want to a=
dd more stuff ... you are right it can fail today.=C2=A0</div><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,hel=
vetica,sans-serif;font-size:small">But this is not the main problem I am po=
inting out. The problem is that in the above case the local guy who is addi=
ng stuff to existing update will locally and immediately know that it faile=
d.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" sty=
le=3D"font-family:arial,helvetica,sans-serif;font-size:small">In the new mo=
del it is nodes far far away who happily injected larger then 4K update mes=
sages will never know that their updates never made it through as they inte=
nded.</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetic=
a,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">And since IDR a=
nd community failed to progress OPERATIONAL MSG in BGP providing a bit of a=
 ops feedback between peers and perhaps beyond we are where we are.=C2=A0<a=
 href=3D"https://goo.gl/JTpQDc" target=3D"_blank">https://goo.gl/JTpQDc</a>=
</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small">Best,</div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">Robert.</div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small"><br></div></div><div class=3D"gmai=
l_extra"><br><div class=3D"gmail_quote">On Tue, Nov 21, 2017 at 11:26 AM, T=
homas Mangin <span dir=3D"ltr">&lt;<a href=3D"mailto:thomas.mangin@exa.net.=
uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;</span> wrote:<br><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #=
ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word;line-break:a=
fter-white-space"><div>Hello Everyone,</div><div><br></div><div><div>I supp=
ort the draft; and I therefore implemented it on ExaBGP master.</div><div><=
br></div><div>I am will keep an eye on the discussion regarding the potenti=
al issue transiting messages with larger than 4k total attributes size coul=
d cause.=C2=A0</div><div><br></div><div>I would have no objection myself on=
 seeing an arbitrary limit on the Total Path Attribute set to prevent backw=
ard compatibility as the most likely quick win is going to be on packing mo=
re NLRI ATM.</div><div><br></div><div>That said, I am not aware of any guid=
eline in previous RFC to cover this issue and it is already possible to enc=
ounter this problem today. So while the draft make the issue more likely, i=
t does not make things worse from a specification POV.</div><div><br></div>=
<div>I am therefore wondering if this should not be covered by another unre=
lated RFC as it can affect current speakers and is not specific to this dra=
ft.</div><div><br></div><div>Sincerely,</div><div><br></div><div>Thomas<br>=
<div>
<div style=3D"font-family:Helvetica;font-size:12px;font-style:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:star=
t;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">=
<br></div></div><div><blockquote type=3D"cite"><div><div class=3D"m_1465612=
020327863408m_-8448415829277468868m_430488959492704421h5"><div>On 12 Nov 20=
17, at 22:47, Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"=
_blank">shares@ndzh.com</a>&gt; wrote:</div><br class=3D"m_1465612020327863=
408m_-8448415829277468868m_430488959492704421m_6988495671839111146Apple-int=
erchange-newline"></div></div><div><div><div class=3D"m_1465612020327863408=
m_-8448415829277468868m_430488959492704421h5"><div class=3D"m_1465612020327=
863408m_-8448415829277468868m_430488959492704421m_6988495671839111146WordSe=
ction1" style=3D"font-family:Helvetica;font-size:12px;font-style:normal;fon=
t-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:s=
tart;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0p=
x"><div style=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri=
,sans-serif">This begins a 2 week WG LC for draft-ietf-idr-bgp-extended-me<=
wbr>ssages (11/12 to 11/26).=C2=A0 Please note this draft has at least 2 im=
plementations. =C2=A0=C2=A0=C2=A0Please comment on whether you feel this dr=
aft is ready for publication.=C2=A0=C2=A0<span class=3D"m_14656120203278634=
08m_-8448415829277468868m_430488959492704421m_6988495671839111146Apple-conv=
erted-space">=C2=A0</span><u></u><u></u></div><div style=3D"margin:0in 0in =
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><u></u>=C2=A0<u></u=
></div><div style=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:Cal=
ibri,sans-serif">Susan Hares<span class=3D"m_1465612020327863408m_-84484158=
29277468868m_430488959492704421m_6988495671839111146Apple-converted-space">=
=C2=A0</span><u></u><u></u></div><div style=3D"margin:0in 0in 0.0001pt;font=
-size:11pt;font-family:Calibri,sans-serif"><u></u>=C2=A0<u></u></div><div s=
tyle=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-ser=
if">PS =E2=80=93 the request for this WG LC is at:<u></u><u></u></div><div =
style=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-se=
rif"><a href=3D"https://www.ietf.org/mail-archive/web/idr/current/msg18801.=
html" style=3D"color:purple;text-decoration:underline" target=3D"_blank">ht=
tps://www.ietf.org/mail-arch<wbr>ive/web/idr/current/msg18801.h<wbr>tml</a>=
<u></u><u></u></div><div style=3D"margin:0in 0in 0.0001pt;font-size:11pt;fo=
nt-family:Calibri,sans-serif"><u></u>=C2=A0<u></u></div><div style=3D"margi=
n:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><u></u>=
=C2=A0<u></u></div><pre style=3D"margin:0in 0in 0.0001pt;font-size:10pt;fon=
t-family:&quot;Courier New&quot;"><span> <u></u><u></u></span></pre><div st=
yle=3D"margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-seri=
f"><u></u>=C2=A0<u></u></div><div style=3D"margin:0in 0in 0.0001pt;font-siz=
e:11pt;font-family:Calibri,sans-serif"><u></u>=C2=A0<u></u></div></div></di=
v></div><span><span style=3D"font-family:Helvetica;font-size:12px;font-styl=
e:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;=
text-align:start;text-indent:0px;text-transform:none;white-space:normal;wor=
d-spacing:0px;float:none;display:inline!important">________________________=
______<wbr>_________________</span><br style=3D"font-family:Helvetica;font-=
size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;let=
ter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;whi=
te-space:normal;word-spacing:0px"><span style=3D"font-family:Helvetica;font=
-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;le=
tter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;wh=
ite-space:normal;word-spacing:0px;float:none;display:inline!important">Idr =
mailing list</span><br style=3D"font-family:Helvetica;font-size:12px;font-s=
tyle:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:norm=
al;text-align:start;text-indent:0px;text-transform:none;white-space:normal;=
word-spacing:0px"><a href=3D"mailto:Idr@ietf.org" style=3D"color:purple;tex=
t-decoration:underline;font-family:Helvetica;font-size:12px;font-style:norm=
al;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-a=
lign:start;text-indent:0px;text-transform:none;white-space:normal;word-spac=
ing:0px" target=3D"_blank">Idr@ietf.org</a><br style=3D"font-family:Helveti=
ca;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:no=
rmal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:=
none;white-space:normal;word-spacing:0px"><a href=3D"https://www.ietf.org/m=
ailman/listinfo/idr" style=3D"color:purple;text-decoration:underline;font-f=
amily:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;f=
ont-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;te=
xt-transform:none;white-space:normal;word-spacing:0px" target=3D"_blank">ht=
tps://www.ietf.org/mailman/l<wbr>istinfo/idr</a></span></div></blockquote><=
/div><br></div></div></div><br>______________________________<wbr>_________=
________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
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> On 21 Nov 2017, at 15:09, Thomas Mangin <thomas.mangin@exa.net.uk> =
wrote:
>=20
> This case is not covered by RFC 7606 for =E2=80=9Cthread-as-withdraw=E2=80=
=9D ? Perhaps time for some code audit by everyone =E2=80=A6

Oh crap !
=
https://github.com/Exa-Networks/exabgp/commit/68e719ce821f075c3d80de085e92=
0e37a0c25bdf =
<https://github.com/Exa-Networks/exabgp/commit/68e719ce821f075c3d80de085e9=
20e37a0c25bdf>

Thomas


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><br =
class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On =
21 Nov 2017, at 15:09, Thomas Mangin &lt;<a =
href=3D"mailto:thomas.mangin@exa.net.uk" =
class=3D"">thomas.mangin@exa.net.uk</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D"">This case is not covered by&nbsp;RFC 7606 for =
=E2=80=9Cthread-as-withdraw=E2=80=9D ? Perhaps time for some code audit =
by everyone =E2=80=A6</div></div></blockquote><br class=3D""></div><div>Oh=
 crap !</div><div><a =
href=3D"https://github.com/Exa-Networks/exabgp/commit/68e719ce821f075c3d80=
de085e920e37a0c25bdf" =
class=3D"">https://github.com/Exa-Networks/exabgp/commit/68e719ce821f075c3=
d80de085e920e37a0c25bdf</a></div><div><br =
class=3D""></div><div>Thomas</div><br class=3D""></body></html>=

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On Tue, 21 Nov 2017 at 15:03, Robert Raszuk <robert@raszuk.net> wrote:

>
> My take would be to make it enabled by default (potentially with a knob t=
o
> disable it if needed) .. otherwise we are creating even worse swiss chees=
e
> even among those implementations which do support it.
>

+ 1 to this.

I=E2=80=99m working on another open source implementation that will have th=
is
enabled by default as well.

Seems sensible if all vendors would take that approach.

Kind regards,

Job

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<div><br><div class=3D"gmail_quote"><div dir=3D"auto">On Tue, 21 Nov 2017 a=
t 15:03, Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net">robert@rasz=
uk.net</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"m=
argin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div cla=
ss=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small"><br></div><div class=3D"gmail_default" style=3D"font-family:aria=
l,helvetica,sans-serif;font-size:small">My take would be to make it enabled=
 by default (potentially with a knob to disable it if needed) .. otherwise =
we are creating even worse swiss cheese even among those implementations wh=
ich do support it.=C2=A0</div></div></blockquote><div dir=3D"auto"><br></di=
v><div dir=3D"auto">+ 1 to this.=C2=A0</div><div dir=3D"auto"><br></div><di=
v dir=3D"auto">I=E2=80=99m working on another open source implementation th=
at will have this enabled by default as well.=C2=A0</div><div dir=3D"auto">=
<br></div><div dir=3D"auto">Seems sensible if all vendors would take that a=
pproach.=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">Kind rega=
rds,</div><div dir=3D"auto"><br></div><div dir=3D"auto">Job</div></div></di=
v>

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I don't know why this is not spelled out in the draft ....

On Tue, Nov 21, 2017 at 5:21 PM, Job Snijders <job@ntt.net> wrote:

>
> On Tue, 21 Nov 2017 at 15:03, Robert Raszuk <robert@raszuk.net> wrote:
>
>>
>> My take would be to make it enabled by default (potentially with a knob
>> to disable it if needed) .. otherwise we are creating even worse swiss
>> cheese even among those implementations which do support it.
>>
>
> + 1 to this.
>
> I=E2=80=99m working on another open source implementation that will have =
this
> enabled by default as well.
>
> Seems sensible if all vendors would take that approach.
>
> Kind regards,
>
> Job
>

--94eb2c0d2326a7be02055e809ec1
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">I don&#39;=
t know why this is not spelled out in the draft ....=C2=A0</div></div><div =
class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue, Nov 21, 2017 a=
t 5:21 PM, Job Snijders <span dir=3D"ltr">&lt;<a href=3D"mailto:job@ntt.net=
" target=3D"_blank">job@ntt.net</a>&gt;</span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex"><div><br><div class=3D"gmail_quote"><span class=3D""><div dir=
=3D"auto">On Tue, 21 Nov 2017 at 15:03, Robert Raszuk &lt;<a href=3D"mailto=
:robert@raszuk.net" target=3D"_blank">robert@raszuk.net</a>&gt; wrote:<br><=
/div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-le=
ft:1px #ccc solid;padding-left:1ex"><div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">My take would be to make it enabled by default (potentially w=
ith a knob to disable it if needed) .. otherwise we are creating even worse=
 swiss cheese even among those implementations which do support it.=C2=A0</=
div></div></blockquote><div dir=3D"auto"><br></div></span><div dir=3D"auto"=
>+ 1 to this.=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">I=E2=
=80=99m working on another open source implementation that will have this e=
nabled by default as well.=C2=A0</div><div dir=3D"auto"><br></div><div dir=
=3D"auto">Seems sensible if all vendors would take that approach.=C2=A0</di=
v><div dir=3D"auto"><br></div><div dir=3D"auto">Kind regards,</div><div dir=
=3D"auto"><br></div><div dir=3D"auto">Job</div></div></div>
</blockquote></div><br></div>

--94eb2c0d2326a7be02055e809ec1--


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From: Job Snijders <job@ntt.net>
Date: Tue, 21 Nov 2017 17:35:30 +0000
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To: Robert Raszuk <robert@raszuk.net>
Cc: Idr <idr-bounces@ietf.org>, Job Snijders <job@ntt.net>,  Thomas Mangin <thomas.mangin@exa.net.uk>, idr wg <idr@ietf.org>, idr-ads@ietf.org
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Robert/Randy,

About this being a default:

Old (Section 4):

A BGP speaker that is willing to send and receive BGP Extended Messages
with a peer SHOULD advertise the BGP Extended Message Capability to the
peer using BGP Capabilities Advertisement RFC5492].

New (Section 4)

A BGP speaker that is capable to send and receive BGP Extended Messages
with a peer SHOULD advertise the BGP Extended Message Capability to the
peer using BGP Capabilities Advertisement [RFC5492].

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<div dir=3D"auto">Robert/Randy,</div><div dir=3D"auto"><br></div><div dir=
=3D"auto">About this being a default:</div><div dir=3D"auto"><br></div><div=
 dir=3D"auto">Old (Section 4):</div><div dir=3D"auto"><br></div><div dir=3D=
"auto">A BGP speaker that is willing to send and receive BGP Extended Messa=
ges with a peer SHOULD advertise the BGP Extended Message Capability to the=
 peer using BGP Capabilities Advertisement RFC5492].</div><div dir=3D"auto"=
><br></div><div dir=3D"auto">New (Section 4)</div><div dir=3D"auto"><br></d=
iv><div dir=3D"auto">A BGP speaker that is capable to send and receive BGP =
Extended Messages with a peer SHOULD advertise the BGP Extended Message Cap=
ability to the peer using BGP Capabilities Advertisement [RFC5492].</div>

--f403043c4204c5c2a7055e81a110--


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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Great !

On Tue, Nov 21, 2017 at 6:35 PM, Job Snijders <job@ntt.net> wrote:

> Robert/Randy,
>
> About this being a default:
>
> Old (Section 4):
>
> A BGP speaker that is willing to send and receive BGP Extended Messages
> with a peer SHOULD advertise the BGP Extended Message Capability to the
> peer using BGP Capabilities Advertisement RFC5492].
>
> New (Section 4)
>
> A BGP speaker that is capable to send and receive BGP Extended Messages
> with a peer SHOULD advertise the BGP Extended Message Capability to the
> peer using BGP Capabilities Advertisement [RFC5492].
>

--94eb2c0d43766444ce055e828a63
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Great !</div></div><div class=3D"gmail_=
extra"><br><div class=3D"gmail_quote">On Tue, Nov 21, 2017 at 6:35 PM, Job =
Snijders <span dir=3D"ltr">&lt;<a href=3D"mailto:job@ntt.net" target=3D"_bl=
ank">job@ntt.net</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote"=
 style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><d=
iv dir=3D"auto">Robert/Randy,</div><div dir=3D"auto"><br></div><div dir=3D"=
auto">About this being a default:</div><div dir=3D"auto"><br></div><div dir=
=3D"auto">Old (Section 4):</div><div dir=3D"auto"><br></div><div dir=3D"aut=
o">A BGP speaker that is willing to send and receive BGP Extended Messages =
with a peer SHOULD advertise the BGP Extended Message Capability to the pee=
r using BGP Capabilities Advertisement RFC5492].</div><div dir=3D"auto"><br=
></div><div dir=3D"auto">New (Section 4)</div><div dir=3D"auto"><br></div><=
div dir=3D"auto">A BGP speaker that is capable to send and receive BGP Exte=
nded Messages with a peer SHOULD advertise the BGP Extended Message Capabil=
ity to the peer using BGP Capabilities Advertisement [RFC5492].</div>
</blockquote></div><br></div>

--94eb2c0d43766444ce055e828a63--


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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Robert Raszuk <robert@raszuk.net>, Job Snijders <job@ntt.net>
CC: idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <idr-bounces@ietf.org>, Thomas Mangin <thomas.mangin@exa.net.uk>
Thread-Topic: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Date: Tue, 21 Nov 2017 22:38:54 +0000
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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--_000_976743ea96934039a85fa74415b45862XCHALN014ciscocom_--


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From: Robert Raszuk <robert@raszuk.net>
Date: Tue, 21 Nov 2017 23:54:57 +0100
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To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
Cc: Job Snijders <job@ntt.net>, idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>,  Idr <idr-bounces@ietf.org>, Thomas Mangin <thomas.mangin@exa.net.uk>
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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--94eb2c0d2326a077d9055e8617e0
Content-Type: text/plain; charset="UTF-8"

Hi Jakob,

I think what you added is fine, but requires a time limit.

Statement that implementation can receive, parse/validate, display in CLI
or match in the policy 16K of communities all actions taking 1h each is
rather not that interesting isn't it ?

Or is the indicator of spec compliance a statement that it just does not
crash regardless of time it takes for execution of each stated action :) ?

Thx,
//R.





On Tue, Nov 21, 2017 at 11:38 PM, Jakob Heitz (jheitz) <jheitz@cisco.com>
wrote:

> The new update message size requires support for:
>
> 16375 communities
>
> 8187 extended communities
>
> 5458 large communities
>
> I have not changed the as-path length, because it is already ridiculously
> high.
>
> If anyone wants to talk about a maximum as-path length, please speak up.
>
>
>
> I have added tests to the implementation report
>
> https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-
> extended-implementations
>
> to ensure full compliance with the consequences of the draft.
>
>
>
> Implementers, please update your compliance.
>
>
>
> Thanks,
>
> Jakob
>
>
>
> *From:* Idr [mailto:idr-bounces@ietf.org] *On Behalf Of *Robert Raszuk
> *Sent:* Tuesday, November 21, 2017 10:41 AM
> *To:* Job Snijders <job@ntt.net>
> *Cc:* idr wg <idr@ietf.org>; idr-ads@ietf.org; Idr <idr-bounces@ietf.org>;
> Thomas Mangin <thomas.mangin@exa.net.uk>
> *Subject:* Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages
> (11/12 to 11/26)
>
>
>
> Great !
>
>
>
> On Tue, Nov 21, 2017 at 6:35 PM, Job Snijders <job@ntt.net> wrote:
>
> Robert/Randy,
>
>
>
> About this being a default:
>
>
>
> Old (Section 4):
>
>
>
> A BGP speaker that is willing to send and receive BGP Extended Messages
> with a peer SHOULD advertise the BGP Extended Message Capability to the
> peer using BGP Capabilities Advertisement RFC5492].
>
>
>
> New (Section 4)
>
>
>
> A BGP speaker that is capable to send and receive BGP Extended Messages
> with a peer SHOULD advertise the BGP Extended Message Capability to the
> peer using BGP Capabilities Advertisement [RFC5492].
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--94eb2c0d2326a077d9055e8617e0
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Jakob,</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">I think what you added is fine, but requires a time=
 limit.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Statemen=
t that implementation can receive, parse/validate, display in CLI or match =
in the policy 16K of communities all actions taking 1h each is rather not t=
hat interesting isn&#39;t it ?=C2=A0</div><div class=3D"gmail_default" styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div=
 class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fo=
nt-size:small">Or is the indicator of spec compliance a statement that it j=
ust does not crash regardless of time it takes for execution of each stated=
 action :) ?</div><div class=3D"gmail_default" style=3D"font-family:arial,h=
elvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Thx,</div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small">//R.</div><div class=3D"gmail_default" style=3D"font-fa=
mily:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gm=
ail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:smal=
l"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvet=
ica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div></di=
v><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue, Nov 21,=
 2017 at 11:38 PM, Jakob Heitz (jheitz) <span dir=3D"ltr">&lt;<a href=3D"ma=
ilto:jheitz@cisco.com" target=3D"_blank">jheitz@cisco.com</a>&gt;</span> wr=
ote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border=
-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_1265418055108559291WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">The new update message size requires support=
 for:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">16375 communities<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">8187 extended communities<u></u><u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">5458 large communities<u></u><u></u></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">I have not changed the as-path length, becau=
se it is already ridiculously high.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">If anyone wants to talk about a maximum as-p=
ath length, please speak up.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">I have added tests to the implementation rep=
ort<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0"><a href=3D"https://trac.ietf.org/trac/idr/wi=
ki/draft-ietf-idr-bgp-extended-implementations" target=3D"_blank">https://t=
rac.ietf.org/trac/<wbr>idr/wiki/draft-ietf-idr-bgp-<wbr>extended-implementa=
tions</a><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">to ensure full compliance with the consequen=
ces of the draft.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Implementers, please update your compliance.=
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Thanks,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0">Jakob<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:#7030a0"><u></u>=C2=A0<u></u></span></p>
<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"> Idr [mailto:<a href=3D"mailto:=
idr-bounces@ietf.org" target=3D"_blank">idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> Tuesday, November 21, 2017 10:41 AM<br>
<b>To:</b> Job Snijders &lt;<a href=3D"mailto:job@ntt.net" target=3D"_blank=
">job@ntt.net</a>&gt;<br>
<b>Cc:</b> idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;; <a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">id=
r-ads@ietf.org</a>; Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=
=3D"_blank">idr-bounces@ietf.org</a>&gt;; Thomas Mangin &lt;<a href=3D"mail=
to:thomas.mangin@exa.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>=
&gt;<span class=3D""><br>
<b>Subject:</b> Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wb=
r>messages (11/12 to 11/26)<u></u><u></u></span></span></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Great !<u></u><u></u></span></p>
</div>
</div><div><div class=3D"h5">
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Tue, Nov 21, 2017 at 6:35 PM, Job Snijders &lt;<a=
 href=3D"mailto:job@ntt.net" target=3D"_blank">job@ntt.net</a>&gt; wrote:<u=
></u><u></u></p>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<p class=3D"MsoNormal">Robert/Randy,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">About this being a default:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Old (Section 4):<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">A BGP speaker that is willing to send and receive BG=
P Extended Messages with a peer SHOULD advertise the BGP Extended Message C=
apability to the peer using BGP Capabilities Advertisement RFC5492].<u></u>=
<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">New (Section 4)<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">A BGP speaker that is capable to send and receive BG=
P Extended Messages with a peer SHOULD advertise the BGP Extended Message C=
apability to the peer using BGP Capabilities Advertisement [RFC5492].<u></u=
><u></u></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div></div></div>
</div>

<br>______________________________<wbr>_________________<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" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div><br></div>

--94eb2c0d2326a077d9055e8617e0--


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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Robert Raszuk <robert@raszuk.net>
CC: Job Snijders <job@ntt.net>, idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <idr-bounces@ietf.org>, Thomas Mangin <thomas.mangin@exa.net.uk>
Thread-Topic: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Robert Raszuk <robert@raszuk.net>
CC: idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, "Thomas Mangin" <thomas.mangin@exa.net.uk>, Idr <idr-bounces@ietf.org>
Thread-Topic: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Date: Tue, 21 Nov 2017 23:12:55 +0000
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--_000_deae6e85c3ff47a6bbcac176eb91bd3eXCHALN014ciscocom_--


From nobody Tue Nov 21 15:30:04 2017
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From: Randy Bush <randy@psg.com>
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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> A BGP speaker that is capable to send and receive BGP Extended
> Messages with a peer SHOULD advertise the BGP Extended Message
> Capability to the peer using BGP Capabilities Advertisement [RFC5492].

   A BGP speaker that is capable of sending and receiving BGP Extended
   Messages SHOULD advertise the BGP Extended Message Capability to the
   peer using BGP Capabilities Advertisement [RFC5492].  A BGP speaker
   MAY send Extended Messages to its peer only if it has received the
   Extended Message Capability from that peer.


From nobody Wed Nov 22 07:10:35 2017
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From: "Borchert, Oliver (Fed)" <oliver.borchert@nist.gov>
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>, Robert Raszuk <robert@raszuk.net>
CC: idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <idr-bounces@ietf.org>, Thomas Mangin <thomas.mangin@exa.net.uk>, Randy Bush <randy@psg.com>
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: "Borchert, Oliver (Fed)" <oliver.borchert@nist.gov>
CC: Robert Raszuk <robert@raszuk.net>, idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <idr-bounces@ietf.org>, "Thomas Mangin" <thomas.mangin@exa.net.uk>, Randy Bush <randy@psg.com>
Thread-Topic: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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From: "Borchert, Oliver (Fed)" <oliver.borchert@nist.gov>
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
CC: Robert Raszuk <robert@raszuk.net>, idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <idr-bounces@ietf.org>, "Thomas Mangin" <thomas.mangin@exa.net.uk>, Randy Bush <randy@psg.com>
Thread-Topic: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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--_000_1D2FD4370EEF4FF69853C09E7EEA2A15nistgov_--


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Cc: "Jakob Heitz (jheitz)" <jheitz@cisco.com>, idr wg <idr@ietf.org>,  "idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <idr-bounces@ietf.org>,  Thomas Mangin <thomas.mangin@exa.net.uk>, Randy Bush <randy@psg.com>
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Hi Olivier,

The larger updates will contain larger attributes and I think Jakob's point
of those questions was to make sure that what actually creates the extended
size BGP UPDATE MSGs can be handled by the implementations who claim
support for it.

However I must agree with you that implementation report draft or wiki is
really not the right place for those questions. It merely is there to
indicate if the draft has been implemented and what parts of the draft got
implemented.

Those questions are perfect for customer evaluation of given bgp
implementation though, but I am afraid we do not have within IETF a room
for such efforts :)

Best,
R.






On Wed, Nov 22, 2017 at 8:58 PM, Borchert, Oliver (Fed) <
oliver.borchert@nist.gov> wrote:

> To my understanding the wiki should state compliance with the draft in
> question and not particular BGP attributes.
>
>
>
> The draft is about the capability of sending and receiving updates larger
> than 4K and how to handle if the capability is not propagated, as well as
> the =E2=80=9C5 mile view=E2=80=9D on what to do if an update would exceed=
 the newly
> proposed max length of 64K, it is not about performance issues etc.
>
>
>
> To me the added questions in the wiki are more about the capability to
> process individual attributes that might become large. This is outside th=
e
> scope of the draft in question.
>
>
>
> It seems to me that what you try to solve is not compliance with the
> draft, it is more about the capability of particular implementations on h=
ow
> to deal with larger updates and this might change with memory, CPU, quali=
ty
> of implementation, etc. but has nothing to do with the draft in question.
>
>
>
> In case there are issues with attributes getting too large and therefore
> causing issues to BGP itself, then I believe the RFC=E2=80=99s dealing wi=
th these
> attributes should be updated.
>
>
>
> Again, I believe this is out of scope of this draft and I do not see any
> need to have these questions in the wiki.
>
>
>
> Oliver
>
>
>
> *From: *"Jakob Heitz (jheitz)" <jheitz@cisco.com>
> *Date: *Wednesday, November 22, 2017 at 12:16 PM
> *To: *Oliver Borchert <oliver.borchert@nist.gov>
> *Cc: *Robert Raszuk <robert@raszuk.net>, idr wg <idr@ietf.org>, "
> idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <idr-bounces@ietf.org>, Thomas
> Mangin <thomas.mangin@exa.net.uk>, Randy Bush <randy@psg.com>
>
> *Subject: *Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messag=
es
> (11/12 to 11/26)
>
>
>
> Larger message implies larger path attributes. You may answer =E2=80=9Cno=
=E2=80=9D for the
> parts with which you do not comply.
>
>
>
> If the implied path attribute sizes are too large, then we need to be
> explicit about the maximum sizes for each attribute in the draft. Please
> suggest reasonable maximum sizes.
>
> Thanks,
>
> Jakob.
>
>
> On Nov 22, 2017, at 7:10 AM, Borchert, Oliver (Fed) <
> oliver.borchert@nist.gov> wrote:
>
> Jakob,
>
>
>
> I looked into the added questions for the compliance report you added on
> the wiki.
>
> I am not quite sure that these added questions do apply for a compliance
> of the requested draft. These do more apply to features used within BGP
> that might result in larger BGP messages.
>
> And here the draft has a clear message in the last paragraph of section 3=
:
>
>
>
> =E2=80=9CIt is RECOMMENDED that BGP protocol developers and implementers =
are
>
>
>   conservative in their application and use of Extended Messages.=E2=80=
=9D
>
>
>
> Therefore, they would more apply to proper functioning of implemented BGP
> features rather than the extended message itself. I do not believe that
> these new questions do apply here.
>
>
>
> Said that, BGPSEC-IO is a traffic generator that mainly focusses on BGPSE=
C
> updates. We did not add communities to the generated traffic and I do not
> intent to do so in the near future (though community contributions are
> welcome) =E2=80=93 in this sense, for sending my answer is NA.
>
> On the receiving side, as long as the BGP update in itself is well formed
> and within its length boundaries (4K or < 64K) there is no issue. We just
> dump the update either on the =E2=80=9Cfloor=E2=80=9D or screen.
>
>
>
> With QuaggaSRx, as long as Quagga can process communities of that length,
> QuaggaSRx can as well. QuaggaSRx same as BGPSEC-IO do comply with the dra=
ft
> itself when it comes to accepting and generating > 4K updates as specifie=
d
> in the draft and we tested the processing and memory usage using BGPsec
> traffic of little less than 64 K.
>
>
>
> Oliver
>
>
>
> *From: *Idr <idr-bounces@ietf.org> on behalf of "Jakob Heitz (jheitz)" <
> jheitz@cisco.com>
> *Date: *Tuesday, November 21, 2017 at 6:13 PM
> *To: *Robert Raszuk <robert@raszuk.net>
> *Cc: *idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <
> idr-bounces@ietf.org>, Thomas Mangin <thomas.mangin@exa.net.uk>
> *Subject: *Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messag=
es
> (11/12 to 11/26)
>
>
>
> 1 hour ??
>
> When I tested my large community code, I tested at the limit and over it.
>
> There was no perceptible time for the operations.
>
> 16 times imperceptible would be a blip at the most.
>
> The only operations that take a worrisome amount of time are regexp
> matches with nested wildcards.
>
> Hmm, I should add regexp matches explicitly, because that requires to
> expand the communities into ascii representation in the matching engine.
>
>
>
> Thanks,
>
> Jakob
>
>
>
> *From:* Idr [mailto:idr-bounces@ietf.org <idr-bounces@ietf.org>] *On
> Behalf Of *Jakob Heitz (jheitz)
> *Sent:* Tuesday, November 21, 2017 2:58 PM
> *To:* Robert Raszuk <robert@raszuk.net>
> *Cc:* idr wg <idr@ietf.org>; idr-ads@ietf.org; Thomas Mangin <
> thomas.mangin@exa.net.uk>; Idr <idr-bounces@ietf.org>
> *Subject:* Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messag=
es
> (11/12 to 11/26)
>
>
>
> Just that it does it without error.
>
> If the numbers are too large, we should discuss reasonable limits.
>
>
>
> Thanks,
>
> Jakob
>
>
>
> *From:* rraszuk@gmail.com [mailto:rraszuk@gmail.com <rraszuk@gmail.com>] =
*On
> Behalf Of *Robert Raszuk
> *Sent:* Tuesday, November 21, 2017 2:55 PM
> *To:* Jakob Heitz (jheitz) <jheitz@cisco.com>
> *Cc:* Job Snijders <job@ntt.net>; idr wg <idr@ietf.org>; idr-ads@ietf.org=
;
> Idr <idr-bounces@ietf.org>; Thomas Mangin <thomas.mangin@exa.net.uk>
> *Subject:* Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messag=
es
> (11/12 to 11/26)
>
>
>
> Hi Jakob,
>
>
>
> I think what you added is fine, but requires a time limit.
>
>
>
> Statement that implementation can receive, parse/validate, display in CLI
> or match in the policy 16K of communities all actions taking 1h each is
> rather not that interesting isn't it ?
>
>
>
> Or is the indicator of spec compliance a statement that it just does not
> crash regardless of time it takes for execution of each stated action :) =
?
>
>
>
> Thx,
>
> //R.
>
>
>
>
>
>
>
>
>
>
>
> On Tue, Nov 21, 2017 at 11:38 PM, Jakob Heitz (jheitz) <jheitz@cisco.com>
> wrote:
>
> The new update message size requires support for:
>
> 16375 communities
>
> 8187 extended communities
>
> 5458 large communities
>
> I have not changed the as-path length, because it is already ridiculously
> high.
>
> If anyone wants to talk about a maximum as-path length, please speak up.
>
>
>
> I have added tests to the implementation report
>
> https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-
> extended-implementations
> <https://na01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftrac.=
ietf.org%2Ftrac%2Fidr%2Fwiki%2Fdraft-ietf-idr-bgp-extended-implementations&=
data=3D02%7C01%7Coliver.borchert%40nist.gov%7Cc29658d9c708468b0ccd08d531357=
6ee%7C2ab5d82fd8fa4797a93e054655c61dec%7C1%7C0%7C636469028063383089&sdata=
=3DzRFsa6v%2BqWcQo44fTcKtmbmqmFZicA495i%2BZfcA4ZSg%3D&reserved=3D0>
>
> to ensure full compliance with the consequences of the draft.
>
>
>
> Implementers, please update your compliance.
>
>
>
> Thanks,
>
> Jakob
>
>
>
> *From:* Idr [mailto:idr-bounces@ietf.org] *On Behalf Of *Robert Raszuk
> *Sent:* Tuesday, November 21, 2017 10:41 AM
> *To:* Job Snijders <job@ntt.net>
> *Cc:* idr wg <idr@ietf.org>; idr-ads@ietf.org; Idr <idr-bounces@ietf.org>=
;
> Thomas Mangin <thomas.mangin@exa.net.uk>
> *Subject:* Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messag=
es
> (11/12 to 11/26)
>
>
>
> Great !
>
>
>
> On Tue, Nov 21, 2017 at 6:35 PM, Job Snijders <job@ntt.net> wrote:
>
> Robert/Randy,
>
>
>
> About this being a default:
>
>
>
> Old (Section 4):
>
>
>
> A BGP speaker that is willing to send and receive BGP Extended Messages
> with a peer SHOULD advertise the BGP Extended Message Capability to the
> peer using BGP Capabilities Advertisement RFC5492].
>
>
>
> New (Section 4)
>
>
>
> A BGP speaker that is capable to send and receive BGP Extended Messages
> with a peer SHOULD advertise the BGP Extended Message Capability to the
> peer using BGP Capabilities Advertisement [RFC5492].
>
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
> <https://na01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fwww.i=
etf.org%2Fmailman%2Flistinfo%2Fidr&data=3D02%7C01%7Coliver.borchert%40nist.=
gov%7Cc29658d9c708468b0ccd08d5313576ee%7C2ab5d82fd8fa4797a93e054655c61dec%7=
C1%7C0%7C636469028063383089&sdata=3DBt6F5N6zA5v7GCXm7peFu06uK1TCD3sRHIVPffp=
%2F0O0%3D&reserved=3D0>
>
>
>
>

--f403043868bc97ba5e055e97e7ee
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Olivier,</div><div class=3D"gmail_de=
fault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br=
></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sa=
ns-serif;font-size:small">The larger updates will contain larger attributes=
 and I think Jakob&#39;s point of those questions was to make sure that wha=
t actually creates the extended size BGP UPDATE MSGs can be handled by the =
implementations who claim support for it.</div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small">However I must agree with you that implementation repor=
t draft or wiki is really not the right place for those questions. It merel=
y is there to indicate if the draft has been implemented and what parts of =
the draft got implemented.=C2=A0</div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div cla=
ss=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small">Those questions are perfect for customer evaluation of given bgp=
 implementation though, but I am afraid we do not have within IETF a room f=
or such efforts :)=C2=A0</div><div class=3D"gmail_default" style=3D"font-fa=
mily:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gm=
ail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:smal=
l">Best,</div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small">R.</div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:a=
rial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_de=
fault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br=
></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sa=
ns-serif;font-size:small">=C2=A0</div></div><div class=3D"gmail_extra"><br>=
<div class=3D"gmail_quote">On Wed, Nov 22, 2017 at 8:58 PM, Borchert, Olive=
r (Fed) <span dir=3D"ltr">&lt;<a href=3D"mailto:oliver.borchert@nist.gov" t=
arget=3D"_blank">oliver.borchert@nist.gov</a>&gt;</span> wrote:<br><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc s=
olid;padding-left:1ex">







<div bgcolor=3D"white" lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_-4323177439807161142WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">To my understanding the wiki should state complianc=
e with the draft in question and not particular BGP attributes.<u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">The draft is about the capability of sending and re=
ceiving updates larger than 4K and how to handle if the capability is not p=
ropagated, as well as the =E2=80=9C5 mile view=E2=80=9D on what
 to do if an update would exceed the newly proposed max length of 64K, it i=
s not about performance issues etc.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">To me the added questions in the wiki are more abou=
t the capability to process individual attributes that might become large. =
This is outside the scope of the draft in question.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">It seems to me that what you try to solve is not co=
mpliance with the draft, it is more about the capability of particular impl=
ementations on how to deal with larger updates
 and this might change with memory, CPU, quality of implementation, etc. bu=
t has nothing to do with the draft in question.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">In case there are issues with attributes getting to=
o large and therefore causing issues to BGP itself, then I believe the RFC=
=E2=80=99s dealing with these attributes should be updated.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Again, I believe this is out of scope of this draft=
 and I do not see any need to have these questions in the wiki.<u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Oliver<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></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"color:black">From: </span></b><spa=
n style=3D"color:black">&quot;Jakob Heitz (jheitz)&quot; &lt;<a href=3D"mai=
lto:jheitz@cisco.com" target=3D"_blank">jheitz@cisco.com</a>&gt;<br>
<b>Date: </b>Wednesday, November 22, 2017 at 12:16 PM<br>
<b>To: </b>Oliver Borchert &lt;<a href=3D"mailto:oliver.borchert@nist.gov" =
target=3D"_blank">oliver.borchert@nist.gov</a>&gt;<br>
<b>Cc: </b>Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D=
"_blank">robert@raszuk.net</a>&gt;, idr wg &lt;<a href=3D"mailto:idr@ietf.o=
rg" target=3D"_blank">idr@ietf.org</a>&gt;, &quot;<a href=3D"mailto:idr-ads=
@ietf.org" target=3D"_blank">idr-ads@ietf.org</a>&quot; &lt;<a href=3D"mail=
to:idr-ads@ietf.org" target=3D"_blank">idr-ads@ietf.org</a>&gt;, Idr &lt;<a=
 href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-bounces@ietf.or=
g</a>&gt;, Thomas Mangin &lt;<a href=3D"mailto:thomas.mangin@exa.net.uk" ta=
rget=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;, Randy Bush &lt;<a href=3D=
"mailto:randy@psg.com" target=3D"_blank">randy@psg.com</a>&gt;</span></p><d=
iv><div class=3D"h5"><br>
<b>Subject: </b>Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wb=
r>messages (11/12 to 11/26)<u></u><u></u></div></div><p></p>
</div><div><div class=3D"h5">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><u></u>=C2=A0<u></u=
></span></p>
</div>
<p class=3D"MsoNormal">Larger message implies larger path attributes. You m=
ay answer =E2=80=9Cno=E2=80=9D for the parts with which you do not comply.
<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">If the implied path a=
ttribute sizes are too large, then we need to be explicit about the maximum=
 sizes for each attribute in the draft. Please suggest reasonable maximum s=
izes.=C2=A0<u></u><u></u></p>
<div id=3D"m_-4323177439807161142AppleMailSignature">
<div>
<p class=3D"MsoNormal">Thanks,<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">Jakob.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
On Nov 22, 2017, at 7:10 AM, Borchert, Oliver (Fed) &lt;<a href=3D"mailto:o=
liver.borchert@nist.gov" target=3D"_blank">oliver.borchert@nist.gov</a>&gt;=
 wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Jakob,</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">I looked into the added questions for the complianc=
e report you added on the wiki.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">I am not quite sure that these added questions do a=
pply for a compliance of the requested draft. These do more apply to featur=
es used within BGP that might result in larger
 BGP messages. </span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">And here the draft has a clear message in the last =
paragraph of section 3:</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=E2=80=9CIt is RECOMMENDED that BGP protocol develo=
pers and implementers are =C2=A0 =C2=A0 =C2=A0 =C2=A0</span><u></u><u></u><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0 conservative in their application and use of=
 Extended Messages.=E2=80=9D</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Therefore, they would more apply to proper function=
ing of implemented BGP features rather than the extended message itself. I =
do not believe that these new questions do apply
 here.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Said that, BGPSEC-IO is a traffic generator that ma=
inly focusses on BGPSEC updates. We did not add communities to the generate=
d traffic and I do not intent to do so in the
 near future (though community contributions are welcome) =E2=80=93 in this=
 sense, for sending my answer is NA.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">On the receiving side, as long as the BGP update in=
 itself is well formed and within its length boundaries (4K or &lt; 64K) th=
ere is no issue. We just dump the update either on
 the =E2=80=9Cfloor=E2=80=9D or screen.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">With QuaggaSRx, as long as Quagga can process commu=
nities of that length, QuaggaSRx can as well. QuaggaSRx same as BGPSEC-IO d=
o comply with the draft itself when it comes to
 accepting and generating &gt; 4K updates as specified in the draft and we =
tested the processing and memory usage using BGPsec traffic of little less =
than 64 K.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Oliver</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span><u></u><u></u></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"color:black">From: </span></b><spa=
n style=3D"color:black">Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" tar=
get=3D"_blank">idr-bounces@ietf.org</a>&gt; on behalf of &quot;Jakob Heitz =
(jheitz)&quot; &lt;<a href=3D"mailto:jheitz@cisco.com" target=3D"_blank">jh=
eitz@cisco.com</a>&gt;<br>
<b>Date: </b>Tuesday, November 21, 2017 at 6:13 PM<br>
<b>To: </b>Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D=
"_blank">robert@raszuk.net</a>&gt;<br>
<b>Cc: </b>idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:idr-ads@ietf.org" target=3D"_bla=
nk">idr-ads@ietf.org</a>&quot; &lt;<a href=3D"mailto:idr-ads@ietf.org" targ=
et=3D"_blank">idr-ads@ietf.org</a>&gt;, Idr &lt;<a href=3D"mailto:idr-bounc=
es@ietf.org" target=3D"_blank">idr-bounces@ietf.org</a>&gt;, Thomas
 Mangin &lt;<a href=3D"mailto:thomas.mangin@exa.net.uk" target=3D"_blank">t=
homas.mangin@exa.net.uk</a>&gt;<br>
<b>Subject: </b>Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wb=
r>messages (11/12 to 11/26)</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">=C2=A0</span><u></u=
><u></u></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">1 hour ??</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">When I tested my large community code,=
 I tested at the limit and over it.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">There was no perceptible time for the =
operations.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">16 times imperceptible would be a blip=
 at the most.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">The only operations that take a worris=
ome amount of time are regexp matches with nested wildcards.</span><u></u><=
u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Hmm, I should add regexp matches expli=
citly, because that requires to expand the communities into ascii represent=
ation in the matching engine.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Thanks,</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Jakob</span><u></u><u></u></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></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"> Idr [<a href=3D"mailto:idr-bou=
nces@ietf.org" target=3D"_blank">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Jakob Heitz (jheitz)<br>
<b>Sent:</b> Tuesday, November 21, 2017 2:58 PM<br>
<b>To:</b> Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D=
"_blank">robert@raszuk.net</a>&gt;<br>
<b>Cc:</b> idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;; <a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">
idr-ads@ietf.org</a>; Thomas Mangin &lt;<a href=3D"mailto:thomas.mangin@exa=
.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;; Idr &lt;<a hre=
f=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-bounces@ietf.org</a=
>&gt;<br>
<b>Subject:</b> Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wb=
r>messages (11/12 to 11/26)</span><u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Just that it does it without error.</s=
pan><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">If the numbers are too large, we shoul=
d discuss reasonable limits.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Thanks,</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Jakob</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></p>
<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">
<a href=3D"mailto:rraszuk@gmail.com" target=3D"_blank">rraszuk@gmail.com</a=
> [<a href=3D"mailto:rraszuk@gmail.com" target=3D"_blank">mailto:rraszuk@gm=
ail.com</a>]
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> Tuesday, November 21, 2017 2:55 PM<br>
<b>To:</b> Jakob Heitz (jheitz) &lt;<a href=3D"mailto:jheitz@cisco.com" tar=
get=3D"_blank">jheitz@cisco.com</a>&gt;<br>
<b>Cc:</b> Job Snijders &lt;<a href=3D"mailto:job@ntt.net" target=3D"_blank=
">job@ntt.net</a>&gt;; idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D=
"_blank">idr@ietf.org</a>&gt;;
<a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">idr-ads@ietf.org</a>;=
 Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-boun=
ces@ietf.org</a>&gt;; Thomas Mangin &lt;<a href=3D"mailto:thomas.mangin@exa=
.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;<br>
<b>Subject:</b> Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wb=
r>messages (11/12 to 11/26)</span><u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Hi Jakob,</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">I think what you added is fine, but requires a time limit.=C2=A0</span=
><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Statement that implementation can receive, parse/validate, display in =
CLI or match in the policy 16K of communities all actions taking 1h each is=
 rather not that interesting isn&#39;t it ?=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Or is the indicator of spec compliance a statement that it just does n=
ot crash regardless of time it takes for execution of each stated action :)=
 ?</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Thx,</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">//R.</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">On Tue, Nov 21, 2017 at 11:38 PM, Jakob Heitz (jheit=
z) &lt;<a href=3D"mailto:jheitz@cisco.com" target=3D"_blank">jheitz@cisco.c=
om</a>&gt; wrote:<u></u><u></u></p>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">The new update message size requires s=
upport for:</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">16375 communities</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">8187 extended communities</span><u></u=
><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">5458 large communities</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">I have not changed the as-path length,=
 because it is already ridiculously high.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">If anyone wants to talk about a maximu=
m as-path length, please speak up.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">I have added tests to the implementati=
on report</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0"><a href=3D"https://na01.safelinks.prot=
ection.outlook.com/?url=3Dhttps%3A%2F%2Ftrac.ietf.org%2Ftrac%2Fidr%2Fwiki%2=
Fdraft-ietf-idr-bgp-extended-implementations&amp;data=3D02%7C01%7Coliver.bo=
rchert%40nist.gov%7Cc29658d9c708468b0ccd08d5313576ee%7C2ab5d82fd8fa4797a93e=
054655c61dec%7C1%7C0%7C636469028063383089&amp;sdata=3DzRFsa6v%2BqWcQo44fTcK=
tmbmqmFZicA495i%2BZfcA4ZSg%3D&amp;reserved=3D0" target=3D"_blank">https://t=
rac.ietf.org/trac/<wbr>idr/wiki/draft-ietf-idr-bgp-<wbr>extended-implementa=
tions</a></span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">to ensure full compliance with the con=
sequences of the draft.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Implementers, please update your compl=
iance.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Thanks,</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Jakob</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></p>
<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"> Idr [mailto:<a href=3D"mailto:=
idr-bounces@ietf.org" target=3D"_blank">idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> Tuesday, November 21, 2017 10:41 AM<br>
<b>To:</b> Job Snijders &lt;<a href=3D"mailto:job@ntt.net" target=3D"_blank=
">job@ntt.net</a>&gt;<br>
<b>Cc:</b> idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;;
<a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">idr-ads@ietf.org</a>;=
 Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-boun=
ces@ietf.org</a>&gt;; Thomas Mangin &lt;<a href=3D"mailto:thomas.mangin@exa=
.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;<br>
<b>Subject:</b> Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wb=
r>messages (11/12 to 11/26)</span><u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Great !</span><u></u><u></u></p>
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">On Tue, Nov 21, 2017 at 6:35 PM, Job Snijders &lt;<a=
 href=3D"mailto:job@ntt.net" target=3D"_blank">job@ntt.net</a>&gt; wrote:<u=
></u><u></u></p>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<p class=3D"MsoNormal">Robert/Randy,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">About this being a default:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Old (Section 4):<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">A BGP speaker that is willing to send and receive BG=
P Extended Messages with a peer SHOULD advertise the BGP Extended Message C=
apability to the peer using BGP Capabilities Advertisement
 RFC5492].<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">New (Section 4)<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">A BGP speaker that is capable to send and receive BG=
P Extended Messages with a peer SHOULD advertise the BGP Extended Message C=
apability to the peer using BGP Capabilities Advertisement
 [RFC5492].<u></u><u></u></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://na01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F=
%2Fwww.ietf.org%2Fmailman%2Flistinfo%2Fidr&amp;data=3D02%7C01%7Coliver.borc=
hert%40nist.gov%7Cc29658d9c708468b0ccd08d5313576ee%7C2ab5d82fd8fa4797a93e05=
4655c61dec%7C1%7C0%7C636469028063383089&amp;sdata=3DBt6F5N6zA5v7GCXm7peFu06=
uK1TCD3sRHIVPffp%2F0O0%3D&amp;reserved=3D0" target=3D"_blank">https://www.i=
etf.org/mailman/<wbr>listinfo/idr</a><u></u><u></u></p>
</blockquote>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</blockquote>
</div>
</div></div></div>
</div>

</blockquote></div><br></div>

--f403043868bc97ba5e055e97e7ee--


From nobody Wed Nov 22 12:30:03 2017
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From: "Borchert, Oliver (Fed)" <oliver.borchert@nist.gov>
To: Robert Raszuk <robert@raszuk.net>
CC: "Jakob Heitz (jheitz)" <jheitz@cisco.com>, idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <idr-bounces@ietf.org>, "Thomas Mangin" <thomas.mangin@exa.net.uk>, Randy Bush <randy@psg.com>
Thread-Topic: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
Thread-Index: AdNcB5lUqir6ZylBRUe7xuFnWiyeYQGq5uSAAAg/8QAAAS+JgAAAPKYAAAK34gAAABCLgAAChkMAAAJHFYAACFGHAAAAj3+AAAAbuIAAAITrgAAhcQSAAARgtwAABaxqgAAAaTSAAACxn4A=
Date: Wed, 22 Nov 2017 20:29:54 +0000
Message-ID: <9FC5C70F-B6B3-411B-A6A3-8652E2DEA778@nist.gov>
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: "Borchert, Oliver (Fed)" <oliver.borchert@nist.gov>
CC: Robert Raszuk <robert@raszuk.net>, idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <idr-bounces@ietf.org>, "Thomas Mangin" <thomas.mangin@exa.net.uk>, Randy Bush <randy@psg.com>
Thread-Topic: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Date: Wed, 22 Nov 2017 23:26:32 +0000
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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References: <000901d35c08$3f12d950$bd388bf0$@ndzh.com> <B61C3B8F-1168-4EB1-8D8E-88C4BF28B3AA@exa.net.uk> <CA+b+ER=1sHhAqhOc2VipzZMB+Zsxk8n+8cNUshkjPw_A9k9E-A@mail.gmail.com> <39049A8C-6D47-4251-AF87-342F68DDE8AE@exa.net.uk> <CA+b+ER=ANs15BEmRKeqneVHNcTSCsGDMVDQgFV4OucwPSWcLgw@mail.gmail.com> <CACWOCC9Yde99EbhLrveCtoUVSZWiP=sL=k69zrGBeNj5AjCGFQ@mail.gmail.com> <CA+b+ERk_2XZ_Y3EqSjNAbSi1ZqKhD2oThrRR2EOJzckQ41GijA@mail.gmail.com> <CACWOCC-EfzOYdUrHAWQN10LBzofySrKRADc6Zq-dyca1o0DPvw@mail.gmail.com> <CA+b+ER=ppm1N2wnMrPxxS_Nug2EaETBkW5gASTVZ2UKKq0aZJA@mail.gmail.com> <976743ea96934039a85fa74415b45862@XCH-ALN-014.cisco.com> <CA+b+ERmpEghcndHKM+WKKxg1V8ufTwg=xqb0J5jNowZHj2OwAQ@mail.gmail.com> <88d5df779a344b588745108c771d3145@XCH-ALN-014.cisco.com> <deae6e85c3ff47a6bbcac176eb91bd3e@XCH-ALN-014.cisco.com> <F0EAF2D4-656D-48BD-830B-DC2E8B862813@nist.gov> <A0106E1A-272D-4E1D-A0F3-E3531D583AA3@cisco.com> <1D2FD437-0EEF-4FF6-9853-C09E7EEA2A15@nist.gov> <2B92A151-5A78-46EE-8A46-C09603A37219@cisco.com>
From: Robert Raszuk <robert@raszuk.net>
Date: Thu, 23 Nov 2017 00:36:19 +0100
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To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
Cc: "Borchert, Oliver (Fed)" <oliver.borchert@nist.gov>, idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <idr-bounces@ietf.org>,  Thomas Mangin <thomas.mangin@exa.net.uk>, Randy Bush <randy@psg.com>
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Hi Jakob,

You are very correct. But the way to address this point (and yes it would
be great to address it) is to include in this current draft (a WG document
after all) sections pertaining to each current BGP Attribute and its
maximum size in the extended message. I think this is what was also
Olivier's main point - not that your observations were wrong - they just
did not fit with the current way documents are progressed.

Or as I suggested add one line to the current spec stating that current
attributes MUST not be extended in size unless a new specific RFC will
allow for it as provide interop between 4k/65K boundary rules for each such
attribute.

Just placing those on implementation report wiki (while not being part of
the document) is not part of the IDR process I am afraid. Besides even if
someone reports it works today you have zero guarantees that it will work
the same way tomorrow unless it is clearly spelled out in the RFC given
implementation claims to support.

Thx,
R.

On Thu, Nov 23, 2017 at 12:26 AM, Jakob Heitz (jheitz) <jheitz@cisco.com>
wrote:

> If router A follows this draft, then it can quite legitimately send an
> update with 16000 communities. If router B cannot receive and process it,
> then it=E2=80=99s broken.
>
> If path attribute size is not addressed, then this draft will cause
> inoperable implementations. As such, it is not fit for standardization.
> Either we assume the maximum possible size for all attributes or specify
> shorter maximum sizes. Anything less leads to failure to interoperate.
>
> Oliver, what maximum sizes does your implementation support?
> You can put those sizes into the wiki.
>
> Thanks,
> Jakob.
>
>
> On Nov 22, 2017, at 11:58 AM, Borchert, Oliver (Fed) <
> oliver.borchert@nist.gov> wrote:
>
> To my understanding the wiki should state compliance with the draft in
> question and not particular BGP attributes.
>
>
>
> The draft is about the capability of sending and receiving updates larger
> than 4K and how to handle if the capability is not propagated, as well as
> the =E2=80=9C5 mile view=E2=80=9D on what to do if an update would exceed=
 the newly
> proposed max length of 64K, it is not about performance issues etc.
>
>
>
> To me the added questions in the wiki are more about the capability to
> process individual attributes that might become large. This is outside th=
e
> scope of the draft in question.
>
>
>
> It seems to me that what you try to solve is not compliance with the
> draft, it is more about the capability of particular implementations on h=
ow
> to deal with larger updates and this might change with memory, CPU, quali=
ty
> of implementation, etc. but has nothing to do with the draft in question.
>
>
>
> In case there are issues with attributes getting too large and therefore
> causing issues to BGP itself, then I believe the RFC=E2=80=99s dealing wi=
th these
> attributes should be updated.
>
>
>
> Again, I believe this is out of scope of this draft and I do not see any
> need to have these questions in the wiki.
>
>
>
> Oliver
>
>
>
> *From: *"Jakob Heitz (jheitz)" <jheitz@cisco.com>
> *Date: *Wednesday, November 22, 2017 at 12:16 PM
> *To: *Oliver Borchert <oliver.borchert@nist.gov>
> *Cc: *Robert Raszuk <robert@raszuk.net>, idr wg <idr@ietf.org>, "
> idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <idr-bounces@ietf.org>, Thomas
> Mangin <thomas.mangin@exa.net.uk>, Randy Bush <randy@psg.com>
> *Subject: *Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messag=
es
> (11/12 to 11/26)
>
>
>
> Larger message implies larger path attributes. You may answer =E2=80=9Cno=
=E2=80=9D for the
> parts with which you do not comply.
>
>
>
> If the implied path attribute sizes are too large, then we need to be
> explicit about the maximum sizes for each attribute in the draft. Please
> suggest reasonable maximum sizes.
>
> Thanks,
>
> Jakob.
>
>
> On Nov 22, 2017, at 7:10 AM, Borchert, Oliver (Fed) <
> oliver.borchert@nist.gov> wrote:
>
> Jakob,
>
>
>
> I looked into the added questions for the compliance report you added on
> the wiki.
>
> I am not quite sure that these added questions do apply for a compliance
> of the requested draft. These do more apply to features used within BGP
> that might result in larger BGP messages.
>
> And here the draft has a clear message in the last paragraph of section 3=
:
>
>
>
> =E2=80=9CIt is RECOMMENDED that BGP protocol developers and implementers =
are
>
>
>   conservative in their application and use of Extended Messages.=E2=80=
=9D
>
>
>
> Therefore, they would more apply to proper functioning of implemented BGP
> features rather than the extended message itself. I do not believe that
> these new questions do apply here.
>
>
>
> Said that, BGPSEC-IO is a traffic generator that mainly focusses on BGPSE=
C
> updates. We did not add communities to the generated traffic and I do not
> intent to do so in the near future (though community contributions are
> welcome) =E2=80=93 in this sense, for sending my answer is NA.
>
> On the receiving side, as long as the BGP update in itself is well formed
> and within its length boundaries (4K or < 64K) there is no issue. We just
> dump the update either on the =E2=80=9Cfloor=E2=80=9D or screen.
>
>
>
> With QuaggaSRx, as long as Quagga can process communities of that length,
> QuaggaSRx can as well. QuaggaSRx same as BGPSEC-IO do comply with the dra=
ft
> itself when it comes to accepting and generating > 4K updates as specifie=
d
> in the draft and we tested the processing and memory usage using BGPsec
> traffic of little less than 64 K.
>
>
>
> Oliver
>
>
>
> *From: *Idr <idr-bounces@ietf.org> on behalf of "Jakob Heitz (jheitz)" <
> jheitz@cisco.com>
> *Date: *Tuesday, November 21, 2017 at 6:13 PM
> *To: *Robert Raszuk <robert@raszuk.net>
> *Cc: *idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <
> idr-bounces@ietf.org>, Thomas Mangin <thomas.mangin@exa.net.uk>
> *Subject: *Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messag=
es
> (11/12 to 11/26)
>
>
>
> 1 hour ??
>
> When I tested my large community code, I tested at the limit and over it.
>
> There was no perceptible time for the operations.
>
> 16 times imperceptible would be a blip at the most.
>
> The only operations that take a worrisome amount of time are regexp
> matches with nested wildcards.
>
> Hmm, I should add regexp matches explicitly, because that requires to
> expand the communities into ascii representation in the matching engine.
>
>
>
> Thanks,
>
> Jakob
>
>
>
> *From:* Idr [mailto:idr-bounces@ietf.org <idr-bounces@ietf.org>] *On
> Behalf Of *Jakob Heitz (jheitz)
> *Sent:* Tuesday, November 21, 2017 2:58 PM
> *To:* Robert Raszuk <robert@raszuk.net>
> *Cc:* idr wg <idr@ietf.org>; idr-ads@ietf.org; Thomas Mangin <
> thomas.mangin@exa.net.uk>; Idr <idr-bounces@ietf.org>
> *Subject:* Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messag=
es
> (11/12 to 11/26)
>
>
>
> Just that it does it without error.
>
> If the numbers are too large, we should discuss reasonable limits.
>
>
>
> Thanks,
>
> Jakob
>
>
>
> *From:* rraszuk@gmail.com [mailto:rraszuk@gmail.com <rraszuk@gmail.com>] =
*On
> Behalf Of *Robert Raszuk
> *Sent:* Tuesday, November 21, 2017 2:55 PM
> *To:* Jakob Heitz (jheitz) <jheitz@cisco.com>
> *Cc:* Job Snijders <job@ntt.net>; idr wg <idr@ietf.org>; idr-ads@ietf.org=
;
> Idr <idr-bounces@ietf.org>; Thomas Mangin <thomas.mangin@exa.net.uk>
> *Subject:* Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messag=
es
> (11/12 to 11/26)
>
>
>
> Hi Jakob,
>
>
>
> I think what you added is fine, but requires a time limit.
>
>
>
> Statement that implementation can receive, parse/validate, display in CLI
> or match in the policy 16K of communities all actions taking 1h each is
> rather not that interesting isn't it ?
>
>
>
> Or is the indicator of spec compliance a statement that it just does not
> crash regardless of time it takes for execution of each stated action :) =
?
>
>
>
> Thx,
>
> //R.
>
>
>
>
>
>
>
>
>
>
>
> On Tue, Nov 21, 2017 at 11:38 PM, Jakob Heitz (jheitz) <jheitz@cisco.com>
> wrote:
>
> The new update message size requires support for:
>
> 16375 communities
>
> 8187 extended communities
>
> 5458 large communities
>
> I have not changed the as-path length, because it is already ridiculously
> high.
>
> If anyone wants to talk about a maximum as-path length, please speak up.
>
>
>
> I have added tests to the implementation report
>
> https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-
> extended-implementations
> <https://na01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftrac.=
ietf.org%2Ftrac%2Fidr%2Fwiki%2Fdraft-ietf-idr-bgp-extended-implementations&=
data=3D02%7C01%7Coliver.borchert%40nist.gov%7Cc29658d9c708468b0ccd08d531357=
6ee%7C2ab5d82fd8fa4797a93e054655c61dec%7C1%7C0%7C636469028063383089&sdata=
=3DzRFsa6v%2BqWcQo44fTcKtmbmqmFZicA495i%2BZfcA4ZSg%3D&reserved=3D0>
>
> to ensure full compliance with the consequences of the draft.
>
>
>
> Implementers, please update your compliance.
>
>
>
> Thanks,
>
> Jakob
>
>
>
> *From:* Idr [mailto:idr-bounces@ietf.org] *On Behalf Of *Robert Raszuk
> *Sent:* Tuesday, November 21, 2017 10:41 AM
> *To:* Job Snijders <job@ntt.net>
> *Cc:* idr wg <idr@ietf.org>; idr-ads@ietf.org; Idr <idr-bounces@ietf.org>=
;
> Thomas Mangin <thomas.mangin@exa.net.uk>
> *Subject:* Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messag=
es
> (11/12 to 11/26)
>
>
>
> Great !
>
>
>
> On Tue, Nov 21, 2017 at 6:35 PM, Job Snijders <job@ntt.net> wrote:
>
> Robert/Randy,
>
>
>
> About this being a default:
>
>
>
> Old (Section 4):
>
>
>
> A BGP speaker that is willing to send and receive BGP Extended Messages
> with a peer SHOULD advertise the BGP Extended Message Capability to the
> peer using BGP Capabilities Advertisement RFC5492].
>
>
>
> New (Section 4)
>
>
>
> A BGP speaker that is capable to send and receive BGP Extended Messages
> with a peer SHOULD advertise the BGP Extended Message Capability to the
> peer using BGP Capabilities Advertisement [RFC5492].
>
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
> <https://na01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fwww.i=
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>
>
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Jakob,</div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small">You are very correct. But the way to address this p=
oint (and yes it would be great to address it) is to include in this curren=
t draft (a WG document after all) sections pertaining to each current BGP A=
ttribute and its maximum size in the extended message. I think this is what=
 was also Olivier&#39;s main point - not that your observations were wrong =
- they just did not fit with the current way documents are progressed.=C2=
=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small">Or as I suggested =
add one line to the current spec stating that current attributes MUST not b=
e extended in size unless a new specific RFC will allow for it as provide i=
nterop between 4k/65K boundary rules for each such attribute.=C2=A0</div><d=
iv class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;=
font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif;font-size:small">Just placing those on impleme=
ntation report wiki (while not being part of the document) is not part of t=
he IDR process I am afraid. Besides even if someone reports it works today =
you have zero guarantees that it will work the same way tomorrow unless it =
is clearly spelled out in the RFC given implementation claims to support.=
=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">Thx,</div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fon=
t-size:small">R.</div></div><div class=3D"gmail_extra"><br><div class=3D"gm=
ail_quote">On Thu, Nov 23, 2017 at 12:26 AM, Jakob Heitz (jheitz) <span dir=
=3D"ltr">&lt;<a href=3D"mailto:jheitz@cisco.com" target=3D"_blank">jheitz@c=
isco.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">



<div dir=3D"auto">
<div>If router A follows this draft, then it can quite legitimately send an=
 update with 16000 communities. If router B cannot receive and process it, =
then it=E2=80=99s broken.</div>
<div><br>
</div>
If path attribute size is not addressed, then this draft will cause inopera=
ble implementations. As such, it is not fit for standardization. Either we =
assume the maximum possible size for all attributes or specify shorter maxi=
mum sizes. Anything less leads to
 failure to interoperate.
<div><br>
</div>
<div>Oliver, what maximum sizes does your implementation support?</div>
<div>You can put those sizes into the wiki.<br>
<br>
<div id=3D"m_-8602471395833698538AppleMailSignature">Thanks,<br>
<div>Jakob.</div>
<div><br>
</div>
</div><div><div class=3D"h5">
<div><br>
On Nov 22, 2017, at 11:58 AM, Borchert, Oliver (Fed) &lt;<a href=3D"mailto:=
oliver.borchert@nist.gov" target=3D"_blank">oliver.borchert@nist.gov</a>&gt=
; wrote:<br>
<br>
</div>
<blockquote type=3D"cite">
<div>




<div class=3D"m_-8602471395833698538WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">To my understanding the wiki should state complianc=
e with the draft in question and not particular BGP attributes.<u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">The draft is about the capability of sending and re=
ceiving updates larger than 4K and how to handle if the capability is not p=
ropagated, as well as the =E2=80=9C5 mile view=E2=80=9D on what
 to do if an update would exceed the newly proposed max length of 64K, it i=
s not about performance issues etc.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">To me the added questions in the wiki are more abou=
t the capability to process individual attributes that might become large. =
This is outside the scope of the draft in question.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">It seems to me that what you try to solve is not co=
mpliance with the draft, it is more about the capability of particular impl=
ementations on how to deal with larger updates
 and this might change with memory, CPU, quality of implementation, etc. bu=
t has nothing to do with the draft in question.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">In case there are issues with attributes getting to=
o large and therefore causing issues to BGP itself, then I believe the RFC=
=E2=80=99s dealing with these attributes should be updated.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Again, I believe this is out of scope of this draft=
 and I do not see any need to have these questions in the wiki.<u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Oliver<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></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"color:black">From: </span></b><spa=
n style=3D"color:black">&quot;Jakob Heitz (jheitz)&quot; &lt;<a href=3D"mai=
lto:jheitz@cisco.com" target=3D"_blank">jheitz@cisco.com</a>&gt;<br>
<b>Date: </b>Wednesday, November 22, 2017 at 12:16 PM<br>
<b>To: </b>Oliver Borchert &lt;<a href=3D"mailto:oliver.borchert@nist.gov" =
target=3D"_blank">oliver.borchert@nist.gov</a>&gt;<br>
<b>Cc: </b>Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D=
"_blank">robert@raszuk.net</a>&gt;, idr wg &lt;<a href=3D"mailto:idr@ietf.o=
rg" target=3D"_blank">idr@ietf.org</a>&gt;, &quot;<a href=3D"mailto:idr-ads=
@ietf.org" target=3D"_blank">idr-ads@ietf.org</a>&quot; &lt;<a href=3D"mail=
to:idr-ads@ietf.org" target=3D"_blank">idr-ads@ietf.org</a>&gt;,
 Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-boun=
ces@ietf.org</a>&gt;, Thomas Mangin &lt;<a href=3D"mailto:thomas.mangin@exa=
.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;, Randy Bush &lt=
;<a href=3D"mailto:randy@psg.com" target=3D"_blank">randy@psg.com</a>&gt;<b=
r>
<b>Subject: </b>Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wb=
r>messages (11/12 to 11/26)<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><u></u>=C2=A0<u></u=
></span></p>
</div>
<p class=3D"MsoNormal">Larger message implies larger path attributes. You m=
ay answer =E2=80=9Cno=E2=80=9D for the parts with which you do not comply.
<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">If the implied path a=
ttribute sizes are too large, then we need to be explicit about the maximum=
 sizes for each attribute in the draft. Please suggest reasonable maximum s=
izes.=C2=A0<u></u><u></u></p>
<div id=3D"m_-8602471395833698538AppleMailSignature">
<div>
<p class=3D"MsoNormal">Thanks,<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">Jakob.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
On Nov 22, 2017, at 7:10 AM, Borchert, Oliver (Fed) &lt;<a href=3D"mailto:o=
liver.borchert@nist.gov" target=3D"_blank">oliver.borchert@nist.gov</a>&gt;=
 wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Jakob,</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">I looked into the added questions for the complianc=
e report you added on the wiki.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">I am not quite sure that these added questions do a=
pply for a compliance of the requested draft. These do more apply to featur=
es used within BGP that might result in larger
 BGP messages. </span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">And here the draft has a clear message in the last =
paragraph of section 3:</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=E2=80=9CIt is RECOMMENDED that BGP protocol develo=
pers and implementers are =C2=A0 =C2=A0 =C2=A0 =C2=A0</span><u></u><u></u><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0 conservative in their application and use of=
 Extended Messages.=E2=80=9D</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Therefore, they would more apply to proper function=
ing of implemented BGP features rather than the extended message itself. I =
do not believe that these new questions do apply
 here.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Said that, BGPSEC-IO is a traffic generator that ma=
inly focusses on BGPSEC updates. We did not add communities to the generate=
d traffic and I do not intent to do so in the
 near future (though community contributions are welcome) =E2=80=93 in this=
 sense, for sending my answer is NA.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">On the receiving side, as long as the BGP update in=
 itself is well formed and within its length boundaries (4K or &lt; 64K) th=
ere is no issue. We just dump the update either on
 the =E2=80=9Cfloor=E2=80=9D or screen.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">With QuaggaSRx, as long as Quagga can process commu=
nities of that length, QuaggaSRx can as well. QuaggaSRx same as BGPSEC-IO d=
o comply with the draft itself when it comes to
 accepting and generating &gt; 4K updates as specified in the draft and we =
tested the processing and memory usage using BGPsec traffic of little less =
than 64 K.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Oliver</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span><u></u><u></u></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"color:black">From: </span></b><spa=
n style=3D"color:black">Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" tar=
get=3D"_blank">idr-bounces@ietf.org</a>&gt; on behalf of &quot;Jakob Heitz =
(jheitz)&quot; &lt;<a href=3D"mailto:jheitz@cisco.com" target=3D"_blank">jh=
eitz@cisco.com</a>&gt;<br>
<b>Date: </b>Tuesday, November 21, 2017 at 6:13 PM<br>
<b>To: </b>Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D=
"_blank">robert@raszuk.net</a>&gt;<br>
<b>Cc: </b>idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:idr-ads@ietf.org" target=3D"_bla=
nk">idr-ads@ietf.org</a>&quot; &lt;<a href=3D"mailto:idr-ads@ietf.org" targ=
et=3D"_blank">idr-ads@ietf.org</a>&gt;, Idr &lt;<a href=3D"mailto:idr-bounc=
es@ietf.org" target=3D"_blank">idr-bounces@ietf.org</a>&gt;, Thomas
 Mangin &lt;<a href=3D"mailto:thomas.mangin@exa.net.uk" target=3D"_blank">t=
homas.mangin@exa.net.uk</a>&gt;<br>
<b>Subject: </b>Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wb=
r>messages (11/12 to 11/26)</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">=C2=A0</span><u></u=
><u></u></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">1 hour ??</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">When I tested my large community code,=
 I tested at the limit and over it.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">There was no perceptible time for the =
operations.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">16 times imperceptible would be a blip=
 at the most.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">The only operations that take a worris=
ome amount of time are regexp matches with nested wildcards.</span><u></u><=
u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Hmm, I should add regexp matches expli=
citly, because that requires to expand the communities into ascii represent=
ation in the matching engine.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Thanks,</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Jakob</span><u></u><u></u></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></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"> Idr [<a href=3D"mailto:idr-bou=
nces@ietf.org" target=3D"_blank">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Jakob Heitz (jheitz)<br>
<b>Sent:</b> Tuesday, November 21, 2017 2:58 PM<br>
<b>To:</b> Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D=
"_blank">robert@raszuk.net</a>&gt;<br>
<b>Cc:</b> idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;; <a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">
idr-ads@ietf.org</a>; Thomas Mangin &lt;<a href=3D"mailto:thomas.mangin@exa=
.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;; Idr &lt;<a hre=
f=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-bounces@ietf.org</a=
>&gt;<br>
<b>Subject:</b> Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wb=
r>messages (11/12 to 11/26)</span><u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Just that it does it without error.</s=
pan><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">If the numbers are too large, we shoul=
d discuss reasonable limits.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Thanks,</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Jakob</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></p>
<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">
<a href=3D"mailto:rraszuk@gmail.com" target=3D"_blank">rraszuk@gmail.com</a=
> [<a href=3D"mailto:rraszuk@gmail.com" target=3D"_blank">mailto:rraszuk@gm=
ail.com</a>]
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> Tuesday, November 21, 2017 2:55 PM<br>
<b>To:</b> Jakob Heitz (jheitz) &lt;<a href=3D"mailto:jheitz@cisco.com" tar=
get=3D"_blank">jheitz@cisco.com</a>&gt;<br>
<b>Cc:</b> Job Snijders &lt;<a href=3D"mailto:job@ntt.net" target=3D"_blank=
">job@ntt.net</a>&gt;; idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D=
"_blank">idr@ietf.org</a>&gt;;
<a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">idr-ads@ietf.org</a>;=
 Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-boun=
ces@ietf.org</a>&gt;; Thomas Mangin &lt;<a href=3D"mailto:thomas.mangin@exa=
.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;<br>
<b>Subject:</b> Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wb=
r>messages (11/12 to 11/26)</span><u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Hi Jakob,</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">I think what you added is fine, but requires a time limit.=C2=A0</span=
><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Statement that implementation can receive, parse/validate, display in =
CLI or match in the policy 16K of communities all actions taking 1h each is=
 rather not that interesting isn&#39;t it ?=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Or is the indicator of spec compliance a statement that it just does n=
ot crash regardless of time it takes for execution of each stated action :)=
 ?</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Thx,</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">//R.</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">=C2=A0</span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">On Tue, Nov 21, 2017 at 11:38 PM, Jakob Heitz (jheit=
z) &lt;<a href=3D"mailto:jheitz@cisco.com" target=3D"_blank">jheitz@cisco.c=
om</a>&gt; wrote:<u></u><u></u></p>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">The new update message size requires s=
upport for:</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">16375 communities</span><u></u><u></u>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">8187 extended communities</span><u></u=
><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">5458 large communities</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">I have not changed the as-path length,=
 because it is already ridiculously high.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">If anyone wants to talk about a maximu=
m as-path length, please speak up.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">I have added tests to the implementati=
on report</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0"><a href=3D"https://na01.safelinks.prot=
ection.outlook.com/?url=3Dhttps%3A%2F%2Ftrac.ietf.org%2Ftrac%2Fidr%2Fwiki%2=
Fdraft-ietf-idr-bgp-extended-implementations&amp;data=3D02%7C01%7Coliver.bo=
rchert%40nist.gov%7Cc29658d9c708468b0ccd08d5313576ee%7C2ab5d82fd8fa4797a93e=
054655c61dec%7C1%7C0%7C636469028063383089&amp;sdata=3DzRFsa6v%2BqWcQo44fTcK=
tmbmqmFZicA495i%2BZfcA4ZSg%3D&amp;reserved=3D0" target=3D"_blank">https://t=
rac.ietf.org/trac/<wbr>idr/wiki/draft-ietf-idr-bgp-<wbr>extended-implementa=
tions</a></span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">to ensure full compliance with the con=
sequences of the draft.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Implementers, please update your compl=
iance.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Thanks,</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">Jakob</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;,serif;color:#7030a0">=C2=A0</span><u></u><u></u></p>
<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"> Idr [mailto:<a href=3D"mailto:=
idr-bounces@ietf.org" target=3D"_blank">idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> Tuesday, November 21, 2017 10:41 AM<br>
<b>To:</b> Job Snijders &lt;<a href=3D"mailto:job@ntt.net" target=3D"_blank=
">job@ntt.net</a>&gt;<br>
<b>Cc:</b> idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;;
<a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">idr-ads@ietf.org</a>;=
 Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-boun=
ces@ietf.org</a>&gt;; Thomas Mangin &lt;<a href=3D"mailto:thomas.mangin@exa=
.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;<br>
<b>Subject:</b> Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-<wb=
r>messages (11/12 to 11/26)</span><u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif">Great !</span><u></u><u></u></p>
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">On Tue, Nov 21, 2017 at 6:35 PM, Job Snijders &lt;<a=
 href=3D"mailto:job@ntt.net" target=3D"_blank">job@ntt.net</a>&gt; wrote:<u=
></u><u></u></p>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<p class=3D"MsoNormal">Robert/Randy,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">About this being a default:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Old (Section 4):<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">A BGP speaker that is willing to send and receive BG=
P Extended Messages with a peer SHOULD advertise the BGP Extended Message C=
apability to the peer using BGP Capabilities Advertisement
 RFC5492].<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">New (Section 4)<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">A BGP speaker that is capable to send and receive BG=
P Extended Messages with a peer SHOULD advertise the BGP Extended Message C=
apability to the peer using BGP Capabilities Advertisement
 [RFC5492].<u></u><u></u></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://na01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F=
%2Fwww.ietf.org%2Fmailman%2Flistinfo%2Fidr&amp;data=3D02%7C01%7Coliver.borc=
hert%40nist.gov%7Cc29658d9c708468b0ccd08d5313576ee%7C2ab5d82fd8fa4797a93e05=
4655c61dec%7C1%7C0%7C636469028063383089&amp;sdata=3DBt6F5N6zA5v7GCXm7peFu06=
uK1TCD3sRHIVPffp%2F0O0%3D&amp;reserved=3D0" target=3D"_blank">https://www.i=
etf.org/mailman/<wbr>listinfo/idr</a><u></u><u></u></p>
</blockquote>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div></div></div>
</div>

</blockquote></div><br></div>

--001a114238606990c7055e9ac9f3--


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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Robert Raszuk <robert@raszuk.net>
CC: "Borchert, Oliver (Fed)" <oliver.borchert@nist.gov>, idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <idr-bounces@ietf.org>, Thomas Mangin <thomas.mangin@exa.net.uk>, Randy Bush <randy@psg.com>
Thread-Topic: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Date: Thu, 23 Nov 2017 01:05:02 +0000
Message-ID: <78E497F6-068D-449D-8D9E-13EC37C39A08@cisco.com>
References: <000901d35c08$3f12d950$bd388bf0$@ndzh.com> <B61C3B8F-1168-4EB1-8D8E-88C4BF28B3AA@exa.net.uk> <CA+b+ER=1sHhAqhOc2VipzZMB+Zsxk8n+8cNUshkjPw_A9k9E-A@mail.gmail.com> <39049A8C-6D47-4251-AF87-342F68DDE8AE@exa.net.uk> <CA+b+ER=ANs15BEmRKeqneVHNcTSCsGDMVDQgFV4OucwPSWcLgw@mail.gmail.com> <CACWOCC9Yde99EbhLrveCtoUVSZWiP=sL=k69zrGBeNj5AjCGFQ@mail.gmail.com> <CA+b+ERk_2XZ_Y3EqSjNAbSi1ZqKhD2oThrRR2EOJzckQ41GijA@mail.gmail.com> <CACWOCC-EfzOYdUrHAWQN10LBzofySrKRADc6Zq-dyca1o0DPvw@mail.gmail.com> <CA+b+ER=ppm1N2wnMrPxxS_Nug2EaETBkW5gASTVZ2UKKq0aZJA@mail.gmail.com> <976743ea96934039a85fa74415b45862@XCH-ALN-014.cisco.com> <CA+b+ERmpEghcndHKM+WKKxg1V8ufTwg=xqb0J5jNowZHj2OwAQ@mail.gmail.com> <88d5df779a344b588745108c771d3145@XCH-ALN-014.cisco.com> <deae6e85c3ff47a6bbcac176eb91bd3e@XCH-ALN-014.cisco.com> <F0EAF2D4-656D-48BD-830B-DC2E8B862813@nist.gov> <A0106E1A-272D-4E1D-A0F3-E3531D583AA3@cisco.com> <1D2FD437-0EEF-4FF6-9853-C09E7EEA2A15@nist.gov> <2B92A151-5A78-46EE-8A46-C09603A37219@cisco.com>, <CA+b+ERkq2NWr5K7wDOafS52+pbKETpGH+5vMXUbGgCGCA0QBEw@mail.gmail.com>
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References: <000901d35c08$3f12d950$bd388bf0$@ndzh.com> <B61C3B8F-1168-4EB1-8D8E-88C4BF28B3AA@exa.net.uk> <CA+b+ER=1sHhAqhOc2VipzZMB+Zsxk8n+8cNUshkjPw_A9k9E-A@mail.gmail.com> <39049A8C-6D47-4251-AF87-342F68DDE8AE@exa.net.uk> <CA+b+ER=ANs15BEmRKeqneVHNcTSCsGDMVDQgFV4OucwPSWcLgw@mail.gmail.com> <CACWOCC9Yde99EbhLrveCtoUVSZWiP=sL=k69zrGBeNj5AjCGFQ@mail.gmail.com> <CA+b+ERk_2XZ_Y3EqSjNAbSi1ZqKhD2oThrRR2EOJzckQ41GijA@mail.gmail.com> <CACWOCC-EfzOYdUrHAWQN10LBzofySrKRADc6Zq-dyca1o0DPvw@mail.gmail.com> <CA+b+ER=ppm1N2wnMrPxxS_Nug2EaETBkW5gASTVZ2UKKq0aZJA@mail.gmail.com> <976743ea96934039a85fa74415b45862@XCH-ALN-014.cisco.com> <CA+b+ERmpEghcndHKM+WKKxg1V8ufTwg=xqb0J5jNowZHj2OwAQ@mail.gmail.com> <88d5df779a344b588745108c771d3145@XCH-ALN-014.cisco.com> <deae6e85c3ff47a6bbcac176eb91bd3e@XCH-ALN-014.cisco.com> <F0EAF2D4-656D-48BD-830B-DC2E8B862813@nist.gov> <A0106E1A-272D-4E1D-A0F3-E3531D583AA3@cisco.com> <1D2FD437-0EEF-4FF6-9853-C09E7EEA2A15@nist.gov> <2B92A151-5A78-46EE-8A46-C09603A37219@cisco.com> <CA+b+ERkq2NWr5K7wDOafS52+pbKETpGH+5vMXUbGgCGCA0QBEw@mail.gmail.com> <78E497F6-068D-449D-8D9E-13EC37C39A08@cisco.com>
From: Robert Raszuk <robert@raszuk.net>
Date: Thu, 23 Nov 2017 10:17:54 +0100
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To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
Cc: "Borchert, Oliver (Fed)" <oliver.borchert@nist.gov>, idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <idr-bounces@ietf.org>,  Thomas Mangin <thomas.mangin@exa.net.uk>, Randy Bush <randy@psg.com>
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Yes the proposed text addresses my concerns. I would only to it one more
sentence:

"=E2=80=8B
The size of individual BGP path attributes MUST be small enough that they
can fit into a BGP UPDATE message of 4096 octets. If a BGP feature requires
a path attribute to be longer, then the required size of the path attribute
MUST be specified in the RFC of the feature requiring it. *Such RFC MUST
also specify the expected behavior on the boundary between peers which do
support extended message size and those which do not."*

Thx,
Robert Raszuk.



On Thu, Nov 23, 2017 at 2:05 AM, Jakob Heitz (jheitz) <jheitz@cisco.com>
wrote:

> I=E2=80=99m happy to add a sentence to the effect of:
> =E2=80=8B=E2=80=8B
> The size of individual BGP path attributes MUST be small enough that they
> can fit into a BGP UPDATE message of 4096 octets. If a BGP feature requir=
es
> a path attribute to be longer, then the required size of the path attribu=
te
> MUST be specified in the RFC of the feature requiring it.
>
> Thanks,
> Jakob.
>
>
> On Nov 22, 2017, at 3:36 PM, Robert Raszuk <robert@raszuk.net> wrote:
>
> Hi Jakob,
>
> You are very correct. But the way to address this point (and yes it would
> be great to address it) is to include in this current draft (a WG documen=
t
> after all) sections pertaining to each current BGP Attribute and its
> maximum size in the extended message. I think this is what was also
> Olivier's main point - not that your observations were wrong - they just
> did not fit with the current way documents are progressed.
>
> Or as I suggested add one line to the current spec stating that current
> attributes MUST not be extended in size unless a new specific RFC will
> allow for it as provide interop between 4k/65K boundary rules for each su=
ch
> attribute.
>
> Just placing those on implementation report wiki (while not being part of
> the document) is not part of the IDR process I am afraid. Besides even if
> someone reports it works today you have zero guarantees that it will work
> the same way tomorrow unless it is clearly spelled out in the RFC given
> implementation claims to support.
>
> Thx,
> R.
>
> On Thu, Nov 23, 2017 at 12:26 AM, Jakob Heitz (jheitz) <jheitz@cisco.com>
> wrote:
>
>> If router A follows this draft, then it can quite legitimately send an
>> update with 16000 communities. If router B cannot receive and process it=
,
>> then it=E2=80=99s broken.
>>
>> If path attribute size is not addressed, then this draft will cause
>> inoperable implementations. As such, it is not fit for standardization.
>> Either we assume the maximum possible size for all attributes or specify
>> shorter maximum sizes. Anything less leads to failure to interoperate.
>>
>> Oliver, what maximum sizes does your implementation support?
>> You can put those sizes into the wiki.
>>
>> Thanks,
>> Jakob.
>>
>>
>> On Nov 22, 2017, at 11:58 AM, Borchert, Oliver (Fed) <
>> oliver.borchert@nist.gov> wrote:
>>
>> To my understanding the wiki should state compliance with the draft in
>> question and not particular BGP attributes.
>>
>>
>>
>> The draft is about the capability of sending and receiving updates large=
r
>> than 4K and how to handle if the capability is not propagated, as well a=
s
>> the =E2=80=9C5 mile view=E2=80=9D on what to do if an update would excee=
d the newly
>> proposed max length of 64K, it is not about performance issues etc.
>>
>>
>>
>> To me the added questions in the wiki are more about the capability to
>> process individual attributes that might become large. This is outside t=
he
>> scope of the draft in question.
>>
>>
>>
>> It seems to me that what you try to solve is not compliance with the
>> draft, it is more about the capability of particular implementations on =
how
>> to deal with larger updates and this might change with memory, CPU, qual=
ity
>> of implementation, etc. but has nothing to do with the draft in question=
.
>>
>>
>>
>> In case there are issues with attributes getting too large and therefore
>> causing issues to BGP itself, then I believe the RFC=E2=80=99s dealing w=
ith these
>> attributes should be updated.
>>
>>
>>
>> Again, I believe this is out of scope of this draft and I do not see any
>> need to have these questions in the wiki.
>>
>>
>>
>> Oliver
>>
>>
>>
>> *From: *"Jakob Heitz (jheitz)" <jheitz@cisco.com>
>> *Date: *Wednesday, November 22, 2017 at 12:16 PM
>> *To: *Oliver Borchert <oliver.borchert@nist.gov>
>> *Cc: *Robert Raszuk <robert@raszuk.net>, idr wg <idr@ietf.org>, "
>> idr-ads@ietf.org" <idr-ads@ietf.org>, Idr <idr-bounces@ietf.org>, Thomas
>> Mangin <thomas.mangin@exa.net.uk>, Randy Bush <randy@psg.com>
>> *Subject: *Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messa=
ges
>> (11/12 to 11/26)
>>
>>
>>
>> Larger message implies larger path attributes. You may answer =E2=80=9Cn=
o=E2=80=9D for
>> the parts with which you do not comply.
>>
>>
>>
>> If the implied path attribute sizes are too large, then we need to be
>> explicit about the maximum sizes for each attribute in the draft. Please
>> suggest reasonable maximum sizes.
>>
>> Thanks,
>>
>> Jakob.
>>
>>
>> On Nov 22, 2017, at 7:10 AM, Borchert, Oliver (Fed) <
>> oliver.borchert@nist.gov> wrote:
>>
>> Jakob,
>>
>>
>>
>> I looked into the added questions for the compliance report you added on
>> the wiki.
>>
>> I am not quite sure that these added questions do apply for a compliance
>> of the requested draft. These do more apply to features used within BGP
>> that might result in larger BGP messages.
>>
>> And here the draft has a clear message in the last paragraph of section =
3:
>>
>>
>>
>> =E2=80=9CIt is RECOMMENDED that BGP protocol developers and implementers=
 are
>>
>>
>>   conservative in their application and use of Extended Messages.=E2=80=
=9D
>>
>>
>>
>> Therefore, they would more apply to proper functioning of implemented BG=
P
>> features rather than the extended message itself. I do not believe that
>> these new questions do apply here.
>>
>>
>>
>> Said that, BGPSEC-IO is a traffic generator that mainly focusses on
>> BGPSEC updates. We did not add communities to the generated traffic and =
I
>> do not intent to do so in the near future (though community contribution=
s
>> are welcome) =E2=80=93 in this sense, for sending my answer is NA.
>>
>> On the receiving side, as long as the BGP update in itself is well forme=
d
>> and within its length boundaries (4K or < 64K) there is no issue. We jus=
t
>> dump the update either on the =E2=80=9Cfloor=E2=80=9D or screen.
>>
>>
>>
>> With QuaggaSRx, as long as Quagga can process communities of that length=
,
>> QuaggaSRx can as well. QuaggaSRx same as BGPSEC-IO do comply with the dr=
aft
>> itself when it comes to accepting and generating > 4K updates as specifi=
ed
>> in the draft and we tested the processing and memory usage using BGPsec
>> traffic of little less than 64 K.
>>
>>
>>
>> Oliver
>>
>>
>>
>> *From: *Idr <idr-bounces@ietf.org> on behalf of "Jakob Heitz (jheitz)" <
>> jheitz@cisco.com>
>> *Date: *Tuesday, November 21, 2017 at 6:13 PM
>> *To: *Robert Raszuk <robert@raszuk.net>
>> *Cc: *idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, Idr =
<
>> idr-bounces@ietf.org>, Thomas Mangin <thomas.mangin@exa.net.uk>
>> *Subject: *Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messa=
ges
>> (11/12 to 11/26)
>>
>>
>>
>> 1 hour ??
>>
>> When I tested my large community code, I tested at the limit and over it=
.
>>
>> There was no perceptible time for the operations.
>>
>> 16 times imperceptible would be a blip at the most.
>>
>> The only operations that take a worrisome amount of time are regexp
>> matches with nested wildcards.
>>
>> Hmm, I should add regexp matches explicitly, because that requires to
>> expand the communities into ascii representation in the matching engine.
>>
>>
>>
>> Thanks,
>>
>> Jakob
>>
>>
>>
>> *From:* Idr [mailto:idr-bounces@ietf.org <idr-bounces@ietf.org>] *On
>> Behalf Of *Jakob Heitz (jheitz)
>> *Sent:* Tuesday, November 21, 2017 2:58 PM
>> *To:* Robert Raszuk <robert@raszuk.net>
>> *Cc:* idr wg <idr@ietf.org>; idr-ads@ietf.org; Thomas Mangin <
>> thomas.mangin@exa.net.uk>; Idr <idr-bounces@ietf.org>
>> *Subject:* Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messa=
ges
>> (11/12 to 11/26)
>>
>>
>>
>> Just that it does it without error.
>>
>> If the numbers are too large, we should discuss reasonable limits.
>>
>>
>>
>> Thanks,
>>
>> Jakob
>>
>>
>>
>> *From:* rraszuk@gmail.com [mailto:rraszuk@gmail.com <rraszuk@gmail.com>]=
 *On
>> Behalf Of *Robert Raszuk
>> *Sent:* Tuesday, November 21, 2017 2:55 PM
>> *To:* Jakob Heitz (jheitz) <jheitz@cisco.com>
>> *Cc:* Job Snijders <job@ntt.net>; idr wg <idr@ietf.org>; idr-ads@ietf.or=
g;
>> Idr <idr-bounces@ietf.org>; Thomas Mangin <thomas.mangin@exa.net.uk>
>> *Subject:* Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messa=
ges
>> (11/12 to 11/26)
>>
>>
>>
>> Hi Jakob,
>>
>>
>>
>> I think what you added is fine, but requires a time limit.
>>
>>
>>
>> Statement that implementation can receive, parse/validate, display in CL=
I
>> or match in the policy 16K of communities all actions taking 1h each is
>> rather not that interesting isn't it ?
>>
>>
>>
>> Or is the indicator of spec compliance a statement that it just does not
>> crash regardless of time it takes for execution of each stated action :)=
 ?
>>
>>
>>
>> Thx,
>>
>> //R.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> On Tue, Nov 21, 2017 at 11:38 PM, Jakob Heitz (jheitz) <jheitz@cisco.com=
>
>> wrote:
>>
>> The new update message size requires support for:
>>
>> 16375 communities
>>
>> 8187 extended communities
>>
>> 5458 large communities
>>
>> I have not changed the as-path length, because it is already ridiculousl=
y
>> high.
>>
>> If anyone wants to talk about a maximum as-path length, please speak up.
>>
>>
>>
>> I have added tests to the implementation report
>>
>> https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-bgp-exten
>> ded-implementations
>> <https://na01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftrac=
.ietf.org%2Ftrac%2Fidr%2Fwiki%2Fdraft-ietf-idr-bgp-extended-implementations=
&data=3D02%7C01%7Coliver.borchert%40nist.gov%7Cc29658d9c708468b0ccd08d53135=
76ee%7C2ab5d82fd8fa4797a93e054655c61dec%7C1%7C0%7C636469028063383089&sdata=
=3DzRFsa6v%2BqWcQo44fTcKtmbmqmFZicA495i%2BZfcA4ZSg%3D&reserved=3D0>
>>
>> to ensure full compliance with the consequences of the draft.
>>
>>
>>
>> Implementers, please update your compliance.
>>
>>
>>
>> Thanks,
>>
>> Jakob
>>
>>
>>
>> *From:* Idr [mailto:idr-bounces@ietf.org] *On Behalf Of *Robert Raszuk
>> *Sent:* Tuesday, November 21, 2017 10:41 AM
>> *To:* Job Snijders <job@ntt.net>
>> *Cc:* idr wg <idr@ietf.org>; idr-ads@ietf.org; Idr <idr-bounces@ietf.org=
>;
>> Thomas Mangin <thomas.mangin@exa.net.uk>
>> *Subject:* Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messa=
ges
>> (11/12 to 11/26)
>>
>>
>>
>> Great !
>>
>>
>>
>> On Tue, Nov 21, 2017 at 6:35 PM, Job Snijders <job@ntt.net> wrote:
>>
>> Robert/Randy,
>>
>>
>>
>> About this being a default:
>>
>>
>>
>> Old (Section 4):
>>
>>
>>
>> A BGP speaker that is willing to send and receive BGP Extended Messages
>> with a peer SHOULD advertise the BGP Extended Message Capability to the
>> peer using BGP Capabilities Advertisement RFC5492].
>>
>>
>>
>> New (Section 4)
>>
>>
>>
>> A BGP speaker that is capable to send and receive BGP Extended Messages
>> with a peer SHOULD advertise the BGP Extended Message Capability to the
>> peer using BGP Capabilities Advertisement [RFC5492].
>>
>>
>>
>>
>> _______________________________________________
>> Idr mailing list
>> Idr@ietf.org
>> https://www.ietf.org/mailman/listinfo/idr
>> <https://na01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fwww.=
ietf.org%2Fmailman%2Flistinfo%2Fidr&data=3D02%7C01%7Coliver.borchert%40nist=
.gov%7Cc29658d9c708468b0ccd08d5313576ee%7C2ab5d82fd8fa4797a93e054655c61dec%=
7C1%7C0%7C636469028063383089&sdata=3DBt6F5N6zA5v7GCXm7peFu06uK1TCD3sRHIVPff=
p%2F0O0%3D&reserved=3D0>
>>
>>
>>
>>
>

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

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Yes the pr=
oposed text addresses my concerns. I would only to it one more sentence:=C2=
=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small"><div style=3D"font=
-family:arial,sans-serif"><div class=3D"gmail_default" style=3D"font-family=
:arial,helvetica,sans-serif;display:inline">&quot;=E2=80=8B</div>The size o=
f individual BGP path attributes MUST be small enough that they can fit int=
o a BGP UPDATE message of 4096 octets. If a BGP feature requires a path att=
ribute to be longer, then the required size of the path attribute MUST be s=
pecified in the RFC of the feature requiring it. <b>Such RFC MUST also spec=
ify the expected behavior on the boundary between peers which do support ex=
tended message size and those which do not.&quot;</b></div><div><br></div><=
div>Thx,</div><div>Robert Raszuk.</div><div><br></div><div><br></div></div>=
<div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu, Nov 23, 2=
017 at 2:05 AM, Jakob Heitz (jheitz) <span dir=3D"ltr">&lt;<a href=3D"mailt=
o:jheitz@cisco.com" target=3D"_blank">jheitz@cisco.com</a>&gt;</span> wrote=
:<br><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bo=
rder-left:1px solid rgb(204,204,204);padding-left:1ex">



<div dir=3D"auto">
I=E2=80=99m happy to add a sentence to the effect of:
<div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small;display:inline">=E2=80=8B=E2=80=8B</div>The size of =
individual BGP path attributes MUST be small enough that they can fit into =
a BGP UPDATE message of 4096 octets. If a BGP feature requires a path attri=
bute to be longer, then the required size of the path attribute MUST be spe=
cified in the RFC
 of the feature requiring it.</div>
<div><br>
<div id=3D"gmail-m_-2237859730900043416AppleMailSignature">Thanks,<br>
<div>Jakob.</div>
<div><br>
</div>
</div><div><div class=3D"gmail-h5">
<div><br>
On Nov 22, 2017, at 3:36 PM, Robert Raszuk &lt;<a href=3D"mailto:robert@ras=
zuk.net" target=3D"_blank">robert@raszuk.net</a>&gt; wrote:<br>
<br>
</div>
<blockquote type=3D"cite">
<div>
<div dir=3D"ltr">
<div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">
Hi Jakob,</div>
<div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">
<br>
</div>
<div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">
You are very correct. But the way to address this point (and yes it would b=
e great to address it) is to include in this current draft (a WG document a=
fter all) sections pertaining to each current BGP Attribute and its maximum=
 size in the extended message. I
 think this is what was also Olivier&#39;s main point - not that your obser=
vations were wrong - they just did not fit with the current way documents a=
re progressed.=C2=A0</div>
<div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">
<br>
</div>
<div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">
Or as I suggested add one line to the current spec stating that current att=
ributes MUST not be extended in size unless a new specific RFC will allow f=
or it as provide interop between 4k/65K boundary rules for each such attrib=
ute.=C2=A0</div>
<div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">
<br>
</div>
<div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">
Just placing those on implementation report wiki (while not being part of t=
he document) is not part of the IDR process I am afraid. Besides even if so=
meone reports it works today you have zero guarantees that it will work the=
 same way tomorrow unless it is
 clearly spelled out in the RFC given implementation claims to support.=C2=
=A0</div>
<div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">
<br>
</div>
<div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">
Thx,</div>
<div style=3D"font-family:arial,helvetica,sans-serif;font-size:small">
R.</div>
</div>
<div class=3D"gmail_extra"><br>
<div class=3D"gmail_quote">On Thu, Nov 23, 2017 at 12:26 AM, Jakob Heitz (j=
heitz) <span dir=3D"ltr">
&lt;<a href=3D"mailto:jheitz@cisco.com" target=3D"_blank">jheitz@cisco.com<=
/a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir=3D"auto">
<div>If router A follows this draft, then it can quite legitimately send an=
 update with 16000 communities. If router B cannot receive and process it, =
then it=E2=80=99s broken.</div>
<div><br>
</div>
If path attribute size is not addressed, then this draft will cause inopera=
ble implementations. As such, it is not fit for standardization. Either we =
assume the maximum possible size for all attributes or specify shorter maxi=
mum sizes. Anything less leads to
 failure to interoperate.
<div><br>
</div>
<div>Oliver, what maximum sizes does your implementation support?</div>
<div>You can put those sizes into the wiki.<br>
<br>
<div id=3D"gmail-m_-2237859730900043416m_-8602471395833698538AppleMailSigna=
ture">Thanks,<br>
<div>Jakob.</div>
<div><br>
</div>
</div>
<div>
<div class=3D"gmail-m_-2237859730900043416h5">
<div><br>
On Nov 22, 2017, at 11:58 AM, Borchert, Oliver (Fed) &lt;<a href=3D"mailto:=
oliver.borchert@nist.gov" target=3D"_blank">oliver.borchert@nist.gov</a>&gt=
; wrote:<br>
<br>
</div>
<blockquote type=3D"cite">
<div>
<div class=3D"gmail-m_-2237859730900043416m_-8602471395833698538WordSection=
1">
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">To my understanding the wiki should state compliance with the dra=
ft in question and not particular BGP attributes.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">The draft is about the capability of sending and receiving update=
s larger than 4K and how to handle if the capability is not propagated, as =
well as the =E2=80=9C5 mile view=E2=80=9D on what
 to do if an update would exceed the newly proposed max length of 64K, it i=
s not about performance issues etc.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">To me the added questions in the wiki are more about the capabili=
ty to process individual attributes that might become large. This is outsid=
e the scope of the draft in question.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">It seems to me that what you try to solve is not compliance with =
the draft, it is more about the capability of particular implementations on=
 how to deal with larger updates
 and this might change with memory, CPU, quality of implementation, etc. bu=
t has nothing to do with the draft in question.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">In case there are issues with attributes getting too large and th=
erefore causing issues to BGP itself, then I believe the RFC=E2=80=99s deal=
ing with these attributes should be updated.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">Again, I believe this is out of scope of this draft and I do not =
see any need to have these questions in the wiki.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">Oliver<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(181,196,223);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"color:black">From: </span></b><spa=
n style=3D"color:black">&quot;Jakob Heitz (jheitz)&quot; &lt;<a href=3D"mai=
lto:jheitz@cisco.com" target=3D"_blank">jheitz@cisco.com</a>&gt;<br>
<b>Date: </b>Wednesday, November 22, 2017 at 12:16 PM<br>
<b>To: </b>Oliver Borchert &lt;<a href=3D"mailto:oliver.borchert@nist.gov" =
target=3D"_blank">oliver.borchert@nist.gov</a>&gt;<br>
<b>Cc: </b>Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D=
"_blank">robert@raszuk.net</a>&gt;, idr wg &lt;<a href=3D"mailto:idr@ietf.o=
rg" target=3D"_blank">idr@ietf.org</a>&gt;, &quot;<a href=3D"mailto:idr-ads=
@ietf.org" target=3D"_blank">idr-ads@ietf.org</a>&quot; &lt;<a href=3D"mail=
to:idr-ads@ietf.org" target=3D"_blank">idr-ads@ietf.org</a>&gt;,
 Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-boun=
ces@ietf.org</a>&gt;, Thomas Mangin &lt;<a href=3D"mailto:thomas.mangin@exa=
.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;, Randy Bush &lt=
;<a href=3D"mailto:randy@psg.com" target=3D"_blank">randy@psg.com</a>&gt;<b=
r>
<b>Subject: </b>Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-me<=
wbr>ssages (11/12 to 11/26)<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
</div>
<p class=3D"MsoNormal">Larger message implies larger path attributes. You m=
ay answer =E2=80=9Cno=E2=80=9D for the parts with which you do not comply.
<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">If the implied path att=
ribute sizes are too large, then we need to be explicit about the maximum s=
izes for each attribute in the draft. Please suggest reasonable maximum siz=
es.=C2=A0<u></u><u></u></p>
<div id=3D"gmail-m_-2237859730900043416m_-8602471395833698538AppleMailSigna=
ture">
<div>
<p class=3D"MsoNormal">Thanks,<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">Jakob.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><br>
On Nov 22, 2017, at 7:10 AM, Borchert, Oliver (Fed) &lt;<a href=3D"mailto:o=
liver.borchert@nist.gov" target=3D"_blank">oliver.borchert@nist.gov</a>&gt;=
 wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"margin-top:5pt;margin-bottom:5pt">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">Jakob,</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">I looked into the added questions for the compliance report you a=
dded on the wiki.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">I am not quite sure that these added questions do apply for a com=
pliance of the requested draft. These do more apply to features used within=
 BGP that might result in larger
 BGP messages. </span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">And here the draft has a clear message in the last paragraph of s=
ection 3:</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">=E2=80=9CIt is RECOMMENDED that BGP protocol developers and imple=
menters are =C2=A0 =C2=A0 =C2=A0 =C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">=C2=A0 conservative in their application and use of Extended Mess=
ages.=E2=80=9D</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">Therefore, they would more apply to proper functioning of impleme=
nted BGP features rather than the extended message itself. I do not believe=
 that these new questions do apply
 here.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">Said that, BGPSEC-IO is a traffic generator that mainly focusses =
on BGPSEC updates. We did not add communities to the generated traffic and =
I do not intent to do so in the
 near future (though community contributions are welcome) =E2=80=93 in this=
 sense, for sending my answer is NA.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">On the receiving side, as long as the BGP update in itself is wel=
l formed and within its length boundaries (4K or &lt; 64K) there is no issu=
e. We just dump the update either on
 the =E2=80=9Cfloor=E2=80=9D or screen.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">With QuaggaSRx, as long as Quagga can process communities of that=
 length, QuaggaSRx can as well. QuaggaSRx same as BGPSEC-IO do comply with =
the draft itself when it comes to
 accepting and generating &gt; 4K updates as specified in the draft and we =
tested the processing and memory usage using BGPsec traffic of little less =
than 64 K.
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">Oliver</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">=C2=A0</span><u></u><u></u></p>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(181,196,223);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"color:black">From: </span></b><spa=
n style=3D"color:black">Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" tar=
get=3D"_blank">idr-bounces@ietf.org</a>&gt; on behalf of &quot;Jakob Heitz =
(jheitz)&quot; &lt;<a href=3D"mailto:jheitz@cisco.com" target=3D"_blank">jh=
eitz@cisco.com</a>&gt;<br>
<b>Date: </b>Tuesday, November 21, 2017 at 6:13 PM<br>
<b>To: </b>Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D=
"_blank">robert@raszuk.net</a>&gt;<br>
<b>Cc: </b>idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:idr-ads@ietf.org" target=3D"_bla=
nk">idr-ads@ietf.org</a>&quot; &lt;<a href=3D"mailto:idr-ads@ietf.org" targ=
et=3D"_blank">idr-ads@ietf.org</a>&gt;, Idr &lt;<a href=3D"mailto:idr-bounc=
es@ietf.org" target=3D"_blank">idr-bounces@ietf.org</a>&gt;,
 Thomas Mangin &lt;<a href=3D"mailto:thomas.mangin@exa.net.uk" target=3D"_b=
lank">thomas.mangin@exa.net.uk</a>&gt;<br>
<b>Subject: </b>Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-me<=
wbr>ssages (11/12 to 11/26)</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">=C2=A0</span><u></u><=
u></u></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">1 hour ??</span><u></u><u></u></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">When I tested my large community=
 code, I tested at the limit and over it.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">There was no perceptible time fo=
r the operations.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">16 times imperceptible would be =
a blip at the most.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">The only operations that take a =
worrisome amount of time are regexp matches with nested wildcards.</span><u=
></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">Hmm, I should add regexp matches=
 explicitly, because that requires to expand the communities into ascii rep=
resentation in the matching engine.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">=C2=A0</span><u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">Thanks,</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">Jakob</span><u></u><u></u></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">=C2=A0</span><u></u><u></u></p>
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11pt;font-family:Calibri=
,sans-serif">From:</span></b><span style=3D"font-size:11pt;font-family:Cali=
bri,sans-serif"> Idr [<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_bl=
ank">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Jakob Heitz (jheitz)<br>
<b>Sent:</b> Tuesday, November 21, 2017 2:58 PM<br>
<b>To:</b> Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D=
"_blank">robert@raszuk.net</a>&gt;<br>
<b>Cc:</b> idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;;
<a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">idr-ads@ietf.org</a>;=
 Thomas Mangin &lt;<a href=3D"mailto:thomas.mangin@exa.net.uk" target=3D"_b=
lank">thomas.mangin@exa.net.uk</a>&gt;; Idr &lt;<a href=3D"mailto:idr-bounc=
es@ietf.org" target=3D"_blank">idr-bounces@ietf.org</a>&gt;<br>
<b>Subject:</b> Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-me<=
wbr>ssages (11/12 to 11/26)</span><u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">Just that it does it without err=
or.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">If the numbers are too large, we=
 should discuss reasonable limits.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">Thanks,</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">Jakob</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11pt;font-family:Calibri=
,sans-serif">From:</span></b><span style=3D"font-size:11pt;font-family:Cali=
bri,sans-serif">
<a href=3D"mailto:rraszuk@gmail.com" target=3D"_blank">rraszuk@gmail.com</a=
> [<a href=3D"mailto:rraszuk@gmail.com" target=3D"_blank">mailto:rraszuk@gm=
ail.com</a>]
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> Tuesday, November 21, 2017 2:55 PM<br>
<b>To:</b> Jakob Heitz (jheitz) &lt;<a href=3D"mailto:jheitz@cisco.com" tar=
get=3D"_blank">jheitz@cisco.com</a>&gt;<br>
<b>Cc:</b> Job Snijders &lt;<a href=3D"mailto:job@ntt.net" target=3D"_blank=
">job@ntt.net</a>&gt;; idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D=
"_blank">idr@ietf.org</a>&gt;;
<a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">idr-ads@ietf.org</a>;=
 Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-boun=
ces@ietf.org</a>&gt;; Thomas Mangin &lt;<a href=3D"mailto:thomas.mangin@exa=
.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;<br>
<b>Subject:</b> Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-me<=
wbr>ssages (11/12 to 11/26)</span><u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">Hi Jako=
b,</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">=C2=A0<=
/span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">I think=
 what you added is fine, but requires a time limit.=C2=A0</span><u></u><u><=
/u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">=C2=A0<=
/span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">Stateme=
nt that implementation can receive, parse/validate, display in CLI or match=
 in the policy 16K of communities all actions taking 1h each is rather not =
that interesting isn&#39;t it ?=C2=A0</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">=C2=A0<=
/span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">Or is t=
he indicator of spec compliance a statement that it just does not crash reg=
ardless of time it takes for execution of each stated action :) ?</span><u>=
</u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">=C2=A0<=
/span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">Thx,</s=
pan><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">//R.</s=
pan><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">=C2=A0<=
/span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">=C2=A0<=
/span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">=C2=A0<=
/span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">=C2=A0<=
/span><u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">On Tue, Nov 21, 2017 at 11:38 PM, Jakob Heitz (jheit=
z) &lt;<a href=3D"mailto:jheitz@cisco.com" target=3D"_blank">jheitz@cisco.c=
om</a>&gt; wrote:<u></u><u></u></p>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin:5pt 0i=
n 5pt 4.8pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">The new update message size requ=
ires support for:</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">16375 communities</span><u></u><=
u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">8187 extended communities</span>=
<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">5458 large communities</span><u>=
</u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">I have not changed the as-path l=
ength, because it is already ridiculously high.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">If anyone wants to talk about a =
maximum as-path length, please speak up.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">I have added tests to the implem=
entation report</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)"><a href=3D"https://na01.safelink=
s.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftrac.ietf.org%2Ftrac%2Fidr%2F=
wiki%2Fdraft-ietf-idr-bgp-extended-implementations&amp;data=3D02%7C01%7Coli=
ver.borchert%40nist.gov%7Cc29658d9c708468b0ccd08d5313576ee%7C2ab5d82fd8fa47=
97a93e054655c61dec%7C1%7C0%7C636469028063383089&amp;sdata=3DzRFsa6v%2BqWcQo=
44fTcKtmbmqmFZicA495i%2BZfcA4ZSg%3D&amp;reserved=3D0" target=3D"_blank">htt=
ps://trac.ietf.org/trac/idr<wbr>/wiki/draft-ietf-idr-bgp-exten<wbr>ded-impl=
ementations</a></span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">to ensure full compliance with t=
he consequences of the draft.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">Implementers, please update your=
 compliance.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">Thanks,</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">Jakob</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;,serif;color:rgb(112,48,160)">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11pt;font-family:Calibri=
,sans-serif">From:</span></b><span style=3D"font-size:11pt;font-family:Cali=
bri,sans-serif"> Idr [mailto:<a href=3D"mailto:idr-bounces@ietf.org" target=
=3D"_blank">idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Robert Raszuk<br>
<b>Sent:</b> Tuesday, November 21, 2017 10:41 AM<br>
<b>To:</b> Job Snijders &lt;<a href=3D"mailto:job@ntt.net" target=3D"_blank=
">job@ntt.net</a>&gt;<br>
<b>Cc:</b> idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr=
@ietf.org</a>&gt;;
<a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">idr-ads@ietf.org</a>;=
 Idr &lt;<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-boun=
ces@ietf.org</a>&gt;; Thomas Mangin &lt;<a href=3D"mailto:thomas.mangin@exa=
.net.uk" target=3D"_blank">thomas.mangin@exa.net.uk</a>&gt;<br>
<b>Subject:</b> Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-me<=
wbr>ssages (11/12 to 11/26)</span><u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Arial,sans-serif">Great !=
</span><u></u><u></u></p>
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">On Tue, Nov 21, 2017 at 6:35 PM, Job Snijders &lt;<a=
 href=3D"mailto:job@ntt.net" target=3D"_blank">job@ntt.net</a>&gt; wrote:<u=
></u><u></u></p>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin:5pt 0i=
n 5pt 4.8pt">
<div>
<p class=3D"MsoNormal">Robert/Randy,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">About this being a default:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Old (Section 4):<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">A BGP speaker that is willing to send and receive BG=
P Extended Messages with a peer SHOULD advertise the BGP Extended Message C=
apability to the peer using BGP Capabilities Advertisement RFC5492].<u></u>=
<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">New (Section 4)<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">A BGP speaker that is capable to send and receive BG=
P Extended Messages with a peer SHOULD advertise the BGP Extended Message C=
apability to the peer using BGP Capabilities Advertisement [RFC5492].<u></u=
><u></u></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><br>
______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a><br>
<a href=3D"https://na01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F=
%2Fwww.ietf.org%2Fmailman%2Flistinfo%2Fidr&amp;data=3D02%7C01%7Coliver.borc=
hert%40nist.gov%7Cc29658d9c708468b0ccd08d5313576ee%7C2ab5d82fd8fa4797a93e05=
4655c61dec%7C1%7C0%7C636469028063383089&amp;sdata=3DBt6F5N6zA5v7GCXm7peFu06=
uK1TCD3sRHIVPffp%2F0O0%3D&amp;reserved=3D0" target=3D"_blank">https://www.i=
etf.org/mailman/l<wbr>istinfo/idr</a><u></u><u></u></p>
</blockquote>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<br>
</div>
</div>
</blockquote>
</div></div></div>
</div>

</blockquote></div><br></div></div>

--001a114685924ed61c055ea2e92c--


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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
To: idr wg <idr@ietf.org>
CC: "idr-chairs@ietf.org" <idr-chairs@ietf.org>
Thread-Topic: IETF 100 IDR meeting minutes
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Dear all,

The minutes of IDR session have been posted:

https://datatracker.ietf.org/meeting/100/materials/minutes-100-idr/

Many thanks to Ignas for helping with the minute taking.

Please review it and let us know if any additions/corrections is needed. Th=
anks.

Best regards,
Jie


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear all, <o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">The minutes of IDR session have=
 been posted:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><a href=3D"https://datatracker.=
ietf.org/meeting/100/materials/minutes-100-idr/">https://datatracker.ietf.o=
rg/meeting/100/materials/minutes-100-idr/</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Many thanks to Ignas for helpin=
g with the minute taking.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Please review it and let us kno=
w if any additions/corrections is needed. Thanks.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Best regards,<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jie<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
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--_000_76CD132C3ADEF848BD84D028D243C9279816C3E0NKGEML515MBXchi_--


From nobody Tue Nov 28 09:43:33 2017
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From: Jeffrey Haas <jhaas@pfrc.org>
To: Nick Hilliard <nick@foobar.org>
Cc: "Acee Lindem (acee)" <acee@cisco.com>, "idr@ietf.org" <idr@ietf.org>
Message-ID: <20171128174700.GP16871@pfrc.org>
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Subject: Re: [Idr] Query on draft-ietf-idr-bgp4-mibv2-15
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On Mon, Nov 20, 2017 at 03:36:21PM +0000, Nick Hilliard wrote:
> Acee Lindem (acee) wrote:
> > The IETF has moved on from SNMP-based management to YANG, refer to this
> > IESG statement:
> > 
> > https://www.ietf.org/iesg/statement/writable-mib-module.html
> 
> the rest of the world is going to take many years to catch up with this
> decision - usable YANG is only beginning to make its way into a small
> segment of high-end kit out there, and there is a large segment of
> market kit where it is likely never to be deployed.
> 
> In the meantime - in this particular situation - we have no means of
> monitoring ipv6 or vrf-enabled bgp sessions, other than screen-scraping.
>  It shouldn't need pointing out that this is a deficit with serious
> operational consequences.

Once upon a time, Sue said to a very new BGP developer: "Hey, I have this
bit of IETF work that needs to be done.  Interested?"

MIB design was a very interesting set of life lessons.  And similarly,
dealing with conflicting opinions about "what belongs in the model".  Mind
you, this was in the day when there some level of insistence that things be
not only monitorable via SNMP, but potentially configurable.

A consequence of a number of these tensions, including the fact that BGP had
an awful lot of optional (but common) features that could be modeled only
with a bit of difficulty in SMI-v2 using abstract indices, meant that there
was a very high degree of *thrash* in the work.  This taxed our MIB doctors
more than a little - thankless work that they still are owed many libations
for.

The big vendors at various snapshot points implemented portions of the 
BGP MIBv2 as enterprise MIBs.  Mostly the useful bits: peering sessions,
counters.  The actual routing table data... yeah, they skipped it.  SNMP is
really an awful hammer to try to grab that stuff from anyway.  And trying to
wedge in all of the different optional things lead to tables of tables...
ick.

mibv2-15 is in a state where most of the big vendors can likely leverage
their enterprise mibs and their existing routing table stuff and do the code
to ship this in reasonable order.  But most aren't interested.  I
occasionally hope to grab the cycles myself to just finish it on my end, but
convincing the rest of product management to do the test and other work
hasn't panned out.

If there's need to actually dust off this MIB, it won't take much work to do
so.  But it'll take quite some convincing, I think.

-- Jeff (author)

P.S. The issue related to the fact that BGP is a maze of optional features
still hasn't been fully resolved in the yang model work that is currently in
progress.  But at least yang let's you do something about having optional
features.



From nobody Tue Nov 28 10:29:47 2017
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From: Jeffrey Haas <jhaas@pfrc.org>
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
Cc: "Borchert, Oliver (Fed)" <oliver.borchert@nist.gov>, idr wg <idr@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, Robert Raszuk <robert@raszuk.net>, Idr <idr-bounces@ietf.org>, Thomas Mangin <thomas.mangin@exa.net.uk>
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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[I'm choosing this message as my response point, but not intending to
suggest that other bits of the thread weren't relevant.]

On Wed, Nov 22, 2017 at 11:26:32PM +0000, Jakob Heitz (jheitz) wrote:
> If router A follows this draft, then it can quite legitimately send an update with 16000 communities. If router B cannot receive and process it, then it’s broken.
> 
> If path attribute size is not addressed, then this draft will cause inoperable implementations. As such, it is not fit for standardization. Either we assume the maximum possible size for all attributes or specify shorter maximum sizes. Anything less leads to failure to interoperate.

BGP has always had an issue with features that had the risk of overflowing
the Path Attributes.  I've seen this (as likely have others supporting
implementations) with odd combinations of AS_PATH, communities, etc.
Extended communities and new features simply make this more likely.

My take on the issue is this:
- If you've selected a route and are attempting to send it to a neighbor and
  you are unable to format a valid BGP PDU containing only a single NLRI,
  you MUST NOT try to send it.
- If you previously sent reachability for that NLRI, and are unable to send
  it as above, you MUST withdraw it.  Otherwise you run the risk of
  improper reachability or forwarding.

Basically, "treat as withdraw" applies here.

IMO, it's no different for extended messsages.  If I receive a > 4k message
and I can't format it for a subsequent peer, treat as withdraw for those
peers.

Where we've had good room for discussion has been what to do in order to
avoid these sort of things:
- Are there circumstances where we might be able to drop an optional
  attribute?  Maybe.  This seems messy to me.
- Are there circumstances where we might be able to limit the size of large
  attributes?  (E.g. communities.)  Possibly.  But this may be unsafe and
  would be highly circumstantial.  Whose route-target do you drop from a VPN
  route as an example?
- Is there wisdom in suggesting "old world" path attributes shouldn't be
  allowed to overflow the 4k limit?  Possibly.  Then you start getting into
  interesting mixes of combinatorics.  For example, long AS_PATH and a long
  community list together.  Implementations already do things like limit
  maximum AS_PATH length.

My personal opinion on the mitigations is that we shouldn't try to be
normative about them in the spec.  As noted in the AS_PATH example, vendors
already limit some attributes to be shorter than what the protocol might
maximally allow.  Leave it to the implementations to provide knobs
appropriate to those implementations.  There may be room in the spec
suggesting that such things are possible.

We *MUST* be normative about the treat as withdraw behavior.

-- Jeff


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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Hi Jeff,

> We *MUST* be normative about the treat as withdraw behavior.

This does provide one way to address my main point that the draft MUST be
updated to define what to do when you get to a bottleneck. Otherwise each
implementation will try to do their own thing which will be a disaster.

However your suggestion creates troubleshooting nightmare. How does a
sender is to know that some routers 3 ASes away did not get his prefix ?
How does the receiver is to know that because he is running older device
with no software upgrade possible he will be potentially missing some
routes ?

Do we no longer care that any BGP4 proposal no matter how great and useful
it is MUST be incrementally deployable ?

Thx,
R.


On Tue, Nov 28, 2017 at 7:33 PM, Jeffrey Haas <jhaas@pfrc.org> wrote:

> [I'm choosing this message as my response point, but not intending to
> suggest that other bits of the thread weren't relevant.]
>
> On Wed, Nov 22, 2017 at 11:26:32PM +0000, Jakob Heitz (jheitz) wrote:
> > If router A follows this draft, then it can quite legitimately send an
> update with 16000 communities. If router B cannot receive and process it,
> then it=E2=80=99s broken.
> >
> > If path attribute size is not addressed, then this draft will cause
> inoperable implementations. As such, it is not fit for standardization.
> Either we assume the maximum possible size for all attributes or specify
> shorter maximum sizes. Anything less leads to failure to interoperate.
>
> BGP has always had an issue with features that had the risk of overflowin=
g
> the Path Attributes.  I've seen this (as likely have others supporting
> implementations) with odd combinations of AS_PATH, communities, etc.
> Extended communities and new features simply make this more likely.
>
> My take on the issue is this:
> - If you've selected a route and are attempting to send it to a neighbor
> and
>   you are unable to format a valid BGP PDU containing only a single NLRI,
>   you MUST NOT try to send it.
> - If you previously sent reachability for that NLRI, and are unable to se=
nd
>   it as above, you MUST withdraw it.  Otherwise you run the risk of
>   improper reachability or forwarding.
>
> Basically, "treat as withdraw" applies here.
>
> IMO, it's no different for extended messsages.  If I receive a > 4k messa=
ge
> and I can't format it for a subsequent peer, treat as withdraw for those
> peers.
>
> Where we've had good room for discussion has been what to do in order to
> avoid these sort of things:
> - Are there circumstances where we might be able to drop an optional
>   attribute?  Maybe.  This seems messy to me.
> - Are there circumstances where we might be able to limit the size of lar=
ge
>   attributes?  (E.g. communities.)  Possibly.  But this may be unsafe and
>   would be highly circumstantial.  Whose route-target do you drop from a
> VPN
>   route as an example?
> - Is there wisdom in suggesting "old world" path attributes shouldn't be
>   allowed to overflow the 4k limit?  Possibly.  Then you start getting in=
to
>   interesting mixes of combinatorics.  For example, long AS_PATH and a lo=
ng
>   community list together.  Implementations already do things like limit
>   maximum AS_PATH length.
>
> My personal opinion on the mitigations is that we shouldn't try to be
> normative about them in the spec.  As noted in the AS_PATH example, vendo=
rs
> already limit some attributes to be shorter than what the protocol might
> maximally allow.  Leave it to the implementations to provide knobs
> appropriate to those implementations.  There may be room in the spec
> suggesting that such things are possible.
>
> We *MUST* be normative about the treat as withdraw behavior.
>
> -- Jeff
>

--001a1143816e5cbfd3055f0fa9d4
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Jeff,</div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></=
div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif;font-size:small"><span style=3D"font-family:arial,sans-serif">&gt; We=
 *MUST* be normative about the treat as withdraw behavior.</span><br style=
=3D"font-family:arial,sans-serif"></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small"><span style=3D"=
font-family:arial,sans-serif"><br></span></div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><span sty=
le=3D"font-family:arial,sans-serif">This does provide one way to address my=
 main point that the draft MUST be updated to define what to do when you ge=
t to a bottleneck. Otherwise each implementation will try to do their own t=
hing which will be a disaster.=C2=A0</span></div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><span s=
tyle=3D"font-family:arial,sans-serif"><br></span></div><div class=3D"gmail_=
default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><=
span style=3D"font-family:arial,sans-serif">However your suggestion creates=
 troubleshooting nightmare. How does a sender is to know that some routers =
3 ASes away did not get his prefix ? How does the receiver is to know that =
because he is running older device with no software upgrade possible he wil=
l be potentially missing some routes ?=C2=A0</span></div><div class=3D"gmai=
l_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"=
><span style=3D"font-family:arial,sans-serif"><br></span></div><div class=
=3D"gmail_default" style=3D"">Do we no longer care that any BGP4 proposal n=
o matter how great and useful it is MUST be incrementally deployable=C2=A0?=
=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small"><span style=3D"font-family:arial,sans-serif"=
><br></span></div><div class=3D"gmail_default" style=3D"font-family:arial,h=
elvetica,sans-serif;font-size:small"><span style=3D"font-family:arial,sans-=
serif">Thx,</span></div><div class=3D"gmail_default" style=3D"font-family:a=
rial,helvetica,sans-serif;font-size:small"><span style=3D"font-family:arial=
,sans-serif">R.</span></div><div class=3D"gmail_default" style=3D"font-fami=
ly:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmai=
l_extra"><br><div class=3D"gmail_quote">On Tue, Nov 28, 2017 at 7:33 PM, Je=
ffrey Haas <span dir=3D"ltr">&lt;<a href=3D"mailto:jhaas@pfrc.org" target=
=3D"_blank">jhaas@pfrc.org</a>&gt;</span> wrote:<br><blockquote class=3D"gm=
ail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,=
204,204);padding-left:1ex">[I&#39;m choosing this message as my response po=
int, but not intending to<br>
suggest that other bits of the thread weren&#39;t relevant.]<br>
<span class=3D"gmail-"><br>
On Wed, Nov 22, 2017 at 11:26:32PM +0000, Jakob Heitz (jheitz) wrote:<br>
&gt; If router A follows this draft, then it can quite legitimately send an=
 update with 16000 communities. If router B cannot receive and process it, =
then it=E2=80=99s broken.<br>
&gt;<br>
&gt; If path attribute size is not addressed, then this draft will cause in=
operable implementations. As such, it is not fit for standardization. Eithe=
r we assume the maximum possible size for all attributes or specify shorter=
 maximum sizes. Anything less leads to failure to interoperate.<br>
<br>
</span>BGP has always had an issue with features that had the risk of overf=
lowing<br>
the Path Attributes.=C2=A0 I&#39;ve seen this (as likely have others suppor=
ting<br>
implementations) with odd combinations of AS_PATH, communities, etc.<br>
Extended communities and new features simply make this more likely.<br>
<br>
My take on the issue is this:<br>
- If you&#39;ve selected a route and are attempting to send it to a neighbo=
r and<br>
=C2=A0 you are unable to format a valid BGP PDU containing only a single NL=
RI,<br>
=C2=A0 you MUST NOT try to send it.<br>
- If you previously sent reachability for that NLRI, and are unable to send=
<br>
=C2=A0 it as above, you MUST withdraw it.=C2=A0 Otherwise you run the risk =
of<br>
=C2=A0 improper reachability or forwarding.<br>
<br>
Basically, &quot;treat as withdraw&quot; applies here.<br>
<br>
IMO, it&#39;s no different for extended messsages.=C2=A0 If I receive a &gt=
; 4k message<br>
and I can&#39;t format it for a subsequent peer, treat as withdraw for thos=
e<br>
peers.<br>
<br>
Where we&#39;ve had good room for discussion has been what to do in order t=
o<br>
avoid these sort of things:<br>
- Are there circumstances where we might be able to drop an optional<br>
=C2=A0 attribute?=C2=A0 Maybe.=C2=A0 This seems messy to me.<br>
- Are there circumstances where we might be able to limit the size of large=
<br>
=C2=A0 attributes?=C2=A0 (E.g. communities.)=C2=A0 Possibly.=C2=A0 But this=
 may be unsafe and<br>
=C2=A0 would be highly circumstantial.=C2=A0 Whose route-target do you drop=
 from a VPN<br>
=C2=A0 route as an example?<br>
- Is there wisdom in suggesting &quot;old world&quot; path attributes shoul=
dn&#39;t be<br>
=C2=A0 allowed to overflow the 4k limit?=C2=A0 Possibly.=C2=A0 Then you sta=
rt getting into<br>
=C2=A0 interesting mixes of combinatorics.=C2=A0 For example, long AS_PATH =
and a long<br>
=C2=A0 community list together.=C2=A0 Implementations already do things lik=
e limit<br>
=C2=A0 maximum AS_PATH length.<br>
<br>
My personal opinion on the mitigations is that we shouldn&#39;t try to be<b=
r>
normative about them in the spec.=C2=A0 As noted in the AS_PATH example, ve=
ndors<br>
already limit some attributes to be shorter than what the protocol might<br=
>
maximally allow.=C2=A0 Leave it to the implementations to provide knobs<br>
appropriate to those implementations.=C2=A0 There may be room in the spec<b=
r>
suggesting that such things are possible.<br>
<br>
We *MUST* be normative about the treat as withdraw behavior.<br>
<br>
-- Jeff<br>
</blockquote></div><br></div></div>

--001a1143816e5cbfd3055f0fa9d4--


From nobody Tue Nov 28 11:11:31 2017
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Robert,

On Tue, Nov 28, 2017 at 08:02:32PM +0100, Robert Raszuk wrote:
> > We *MUST* be normative about the treat as withdraw behavior.
> 
> This does provide one way to address my main point that the draft MUST be
> updated to define what to do when you get to a bottleneck. Otherwise each
> implementation will try to do their own thing which will be a disaster.
> 
> However your suggestion creates troubleshooting nightmare. How does a
> sender is to know that some routers 3 ASes away did not get his prefix ?
> How does the receiver is to know that because he is running older device
> with no software upgrade possible he will be potentially missing some
> routes ?

We don't know this today.

I don't believe trying to solve it in this document helps.

> Do we no longer care that any BGP4 proposal no matter how great and useful
> it is MUST be incrementally deployable ?

I do not see this as world ending. :-)

The original scenario for bgpsec is one where we had significant concerns
about too-small UPDATE messages causing issues.  We had to address the
issues there.  And we already know that as a feature it has incremental
deployment challenges.

For everything else, the cases I'm currently familiar with that are likely
to cause quasi-legitimate overflows are mostly VPN scenarios.  The "blast
radius" is thus somewhat local.  I'm curious about other known scenarios.

There is likely good room for GROW to pick up the topic of how to mitigate
overflows.  I think the IDR audience is somewhat too narrow.

-- Jeff


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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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--f403043868bcbbb386055f0ffb64
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> =E2=80=8B=E2=80=8B
I don't believe trying to solve it in this document helps.

Never suggested that.

> =E2=80=8B
The original scenario for bgpsec is one where we had significant concerns
> about too-small UPDATE messages causing issues.  We had to address the
> issues there.  And we already know that as a feature it has incremental
> deployment challenges.

Well if this is still for BGPSEC I think your suggestion to
treat-as-withdraw is not
that good. I do prefer to get unsecured reachability then no reachability
at all.

And if you make it treat-as-withdraw as MUST even if BGSEC itself says to
drop
crypto when it does not fit it is quite unlikely that anyone will even try
to secure
BGP UPDATES any time soon.

Cheers,
R.

--f403043868bcbbb386055f0ffb64
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><div class=3D"gmail_default" style=3D"d=
isplay:inline"><br></div></div><div class=3D"gmail_default" style=3D"font-f=
amily:arial,helvetica,sans-serif;font-size:small"><div class=3D"gmail_defau=
lt" style=3D"display:inline">&gt; =E2=80=8B=E2=80=8B</div><span style=3D"fo=
nt-family:arial,sans-serif">I don&#39;t believe trying to solve it in this =
document helps.</span><br></div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small"><span style=3D"font-fami=
ly:arial,sans-serif"><br></span></div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small"><span style=3D"fon=
t-family:arial,sans-serif">Never suggested that.=C2=A0</span></div><div cla=
ss=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small"><span style=3D"font-family:arial,sans-serif"><br></span></div><d=
iv class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;=
font-size:small"><div class=3D"gmail_default" style=3D"display:inline">&gt;=
 =E2=80=8B</div><span style=3D"font-family:arial,sans-serif">The original s=
cenario for bgpsec is one where we had significant concerns</span></div><di=
v class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;f=
ont-size:small">&gt;=C2=A0<span style=3D"font-family:arial,sans-serif">abou=
t too-small UPDATE messages causing issues.=C2=A0 We had to address the</sp=
an></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small">&gt;=C2=A0<span style=3D"font-family:arial,sans=
-serif">issues there.=C2=A0 And we already know that as a feature it has in=
cremental</span></div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small">&gt;=C2=A0<span style=3D"font-fami=
ly:arial,sans-serif">deployment challenges.</span><br style=3D"font-family:=
arial,sans-serif"></div><div class=3D"gmail_default" style=3D"font-family:a=
rial,helvetica,sans-serif;font-size:small"><span style=3D"font-family:arial=
,sans-serif"><br></span></div><div class=3D"gmail_default" style=3D"font-fa=
mily:arial,helvetica,sans-serif;font-size:small"><span style=3D"font-family=
:arial,sans-serif">Well if this is still for BGPSEC I think your suggestion=
 to treat-as-withdraw is not=C2=A0</span></div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><span sty=
le=3D"font-family:arial,sans-serif">that good.=C2=A0</span><span style=3D"f=
ont-family:arial,sans-serif">I do prefer to get unsecured</span><span style=
=3D"font-family:arial,sans-serif">=C2=A0reachability then no reachability a=
t all.=C2=A0</span></div><div class=3D"gmail_default" style=3D""><br></div>=
<div class=3D"gmail_default" style=3D"">And if you make it treat-as-withdra=
w as MUST even if BGSEC itself says to drop=C2=A0</div><div class=3D"gmail_=
default" style=3D"">crypto when it does not fit it is quite unlikely that a=
nyone will even try to secure=C2=A0</div><div class=3D"gmail_default" style=
=3D"">BGP UPDATES any time soon.=C2=A0</div><div class=3D"gmail_default" st=
yle=3D""><br></div><div class=3D"gmail_default" style=3D"">Cheers,<br>R.</d=
iv></div>

--f403043868bcbbb386055f0ffb64--


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To: Robert Raszuk <robert@raszuk.net>
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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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Robert,

On Tue, Nov 28, 2017 at 08:25:35PM +0100, Robert Raszuk wrote:
> > The original scenario for bgpsec is one where we had significant concerns
> > about too-small UPDATE messages causing issues.  We had to address the
> > issues there.  And we already know that as a feature it has incremental
> > deployment challenges.
> 
> Well if this is still for BGPSEC I think your suggestion to
> treat-as-withdraw is not
> that good. I do prefer to get unsecured reachability then no reachability
> at all.

If a bgpsec speaker chooses to "downgrade" its reachability, that's its
choice.  In such a case, it would no longer be trying to overflow the 4k
PDU.

Similarly, routers that limit AS_PATH length choosing to not propagate (and
treat as withdraw) an AS_PATH that exceeds its local limit is a local
choice.

> And if you make it treat-as-withdraw as MUST even if BGSEC itself says to
> drop
> crypto when it does not fit it is quite unlikely that anyone will even try
> to secure
> BGP UPDATES any time soon.

bgpsec implementations are likely to deploy extended messages in tandem.  I
don't find the argument you seem to be making compelling.

-- Jeff


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Subject: Re: [Idr] WG Last Call foir draft-ietf-idr-bgp-extended-messages (11/12 to 11/26)
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--f403043868bc333d5b055f10324e
Content-Type: text/plain; charset="UTF-8"

> bgpsec implementations are likely to deploy extended messages in tandem.

Is this just your assumption or is this enforced in any IETF document ?

This is important news no one earlier mentioned in this entire thread.

Thx

--f403043868bc333d5b055f10324e
Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><span style=3D"font-family:arial,sans-s=
erif;font-size:12.8px"><br></span></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small"><span style=3D"=
font-family:arial,sans-serif;font-size:12.8px">&gt; bgpsec implementations =
are likely to deploy extended messages in tandem.</span><br></div><div clas=
s=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-si=
ze:small"><span style=3D"font-family:arial,sans-serif;font-size:12.8px"><br=
></span></div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small"><span style=3D"font-family:arial,sans-seri=
f;font-size:12.8px">Is this just your assumption or is this enforced in any=
 IETF document ?=C2=A0</span></div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small"><span style=3D"font-f=
amily:arial,sans-serif;font-size:12.8px"><br></span></div><div class=3D"gma=
il_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small=
"><span style=3D"font-family:arial,sans-serif;font-size:12.8px">This is imp=
ortant news no one earlier mentioned in this entire thread.=C2=A0</span></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small"><span style=3D"font-family:arial,sans-serif;font-size=
:12.8px"><br></span></div><div class=3D"gmail_default" style=3D"font-family=
:arial,helvetica,sans-serif;font-size:small"><span style=3D"font-family:ari=
al,sans-serif;font-size:12.8px">Thx</span></div></div>

--f403043868bc333d5b055f10324e--


From nobody Wed Nov 29 23:13:01 2017
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Subject: [Idr] I-D Action: draft-ietf-idr-eag-distribution-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 Inter-Domain Routing WG of the IETF.

        Title           : Distribution of MPLS-TE Extended admin Group Using BGP
        Authors         : Zitao Wang
                          Qin Wu
                          Jeff Tantsura
	Filename        : draft-ietf-idr-eag-distribution-05.txt
	Pages           : 5
	Date            : 2017-11-29

Abstract:
   As MPLS-TE network grows, administrative Groups advertised as a
   fixed-length 32-bit Bitmask is quite constraining.  "Extended
   Administrative Group" IGP TE extensions sub-TLV is introduced to
   provide for additional administrative groups (link colors) beyond the
   current limit of 32.  This document describes extensions to BGP
   protocol, that can be used to distribute extended administrative
   groups in MPLS-TE.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-idr-eag-distribution/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-idr-eag-distribution-05
https://datatracker.ietf.org/doc/html/draft-ietf-idr-eag-distribution-05

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-idr-eag-distribution-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: Robert Raszuk <robert@raszuk.net>
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Subject: [Idr] draft-ietf-idr-eag-distribution-05.txt
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--089e082fe404551112055f301e5e
Content-Type: text/plain; charset="UTF-8"

/* While the draft is in IDR I am adding MPLS WG here as the discussion is
really about MPLS-TE and not BGP */

Hi,

I looked at draft-ietf-idr-eag-distribution-05.txt and would like to share
few comments on it.

The draft defines extension to BGP-LS in order for the node to signal
extended admin groups of a links in the TE domain relaxing the current
limit of 32 bits.

Observations:

1. Is the draft only applicable to MPLS-TE or also to SR networks ? If the
latter the title needs to be changed.

2. While it is usually considered good to have more then less of anything
let's look at the bigger picture and the consequences of this proposal in
respect to its current applicability of MPLS-TE:

Signalling of 32 affinity bits of the link is just a tiny piece of the full
picture. In MPLS-TE networks those bits are signaled in SESSION_ATTRIBUTE
of RSVP-PATH msg as defined in RFC3209 section 4.7

Signalling more then 32 bits will just not fit the current space hence
fundamental set of RSVP-TE (aka MPLS-TE) operation are broken.

Likewise most of the CSPF implementations would also need to modified to
accomodate for BGP signalled extened affinity bits.

IMO if there is real need to have more then 32 admin groups per link in a
TE domain the right process would be to extend IGP as well as RSVP-TE RFCs
for it.

Moreover as we know RSVP-TE or SR-TE while can steer packets via
constrained paths do not guarantee any interface level reservations or
packet prioritization. Those are control plane driven features.

As such one could also notice that with the extened set of link affinity
classes there is real need to also extend QoS of each network element to
offer more then 32 diffserv classes. Otherwise in the event of congestion
it is likely that packets assumed to be classified into one admin group
will likely compete for bandwith in the same queue with packets classified
into different group.

So while I do not have concerns to define such TLV in BGP-LS I do have
bigger picture observations which I believe need to be addressed and need
to become formal references in this document before we proceed on it in IDR
any further.

Cheers,
Robert.

--089e082fe404551112055f301e5e
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">/* While the draft is in IDR I am addin=
g MPLS WG here as the discussion is really about MPLS-TE and not BGP */</di=
v><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-f=
amily:arial,helvetica,sans-serif;font-size:small">Hi,</div><div class=3D"gm=
ail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:smal=
l"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvet=
ica,sans-serif;font-size:small">I looked at=C2=A0draft-ietf-idr-eag-distrib=
ution-05.txt and would like to share few comments on it.=C2=A0</div><div cl=
ass=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-=
size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small">The draft defines extension to BGP=
-LS in order for the node to signal extended admin groups of a links in the=
 TE domain relaxing the current limit of 32 bits.=C2=A0</div><div class=3D"=
gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:sm=
all"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helv=
etica,sans-serif;font-size:small">Observations:</div><div class=3D"gmail_de=
fault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br=
></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sa=
ns-serif;font-size:small">1. Is the draft only applicable to MPLS-TE or als=
o to SR networks ? If the latter the title needs to be changed.=C2=A0</div>=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-fam=
ily:arial,helvetica,sans-serif;font-size:small">2. While it is usually cons=
idered good to have more then less of anything let&#39;s look at the bigger=
 picture and the consequences of this proposal in respect to its current ap=
plicability of MPLS-TE:=C2=A0</div><div class=3D"gmail_default" style=3D"fo=
nt-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">Signalling of 32 affinity bits of the link is just a tiny piece of=
 the full picture. In MPLS-TE networks those bits are signaled in SESSION_A=
TTRIBUTE of RSVP-PATH msg as defined in RFC3209 section 4.7</div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small">Signalling more then 32 bits will jus=
t not fit the current space hence fundamental set of RSVP-TE (aka MPLS-TE) =
operation are broken.=C2=A0</div><div class=3D"gmail_default" style=3D"font=
-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:s=
mall">Likewise most of the CSPF implementations would also need to modified=
 to accomodate for BGP signalled extened affinity bits.=C2=A0</div><div cla=
ss=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-s=
ize:small"><br></div><div class=3D"gmail_default" style=3D"font-family:aria=
l,helvetica,sans-serif;font-size:small">IMO if there is real need to have m=
ore then 32 admin groups per link in a TE domain the right process would be=
 to extend IGP as well as RSVP-TE RFCs for it.=C2=A0</div><div class=3D"gma=
il_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small=
"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small">Moreover as we know RSVP-TE or SR-TE while c=
an steer packets via constrained paths do not guarantee any interface level=
 reservations or packet prioritization. Those are control plane driven feat=
ures.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small">As such on=
e could also notice that with the extened set of link affinity classes ther=
e is real need to also extend QoS of each network element to offer more the=
n 32 diffserv classes. Otherwise in the event of congestion it is likely th=
at packets assumed to be classified into one admin group will likely compet=
e for bandwith in the same queue with packets classified into different gro=
up.</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small">So while I do not =
have concerns to define such TLV in BGP-LS I do have bigger picture observa=
tions which I believe need to be addressed and need to become formal refere=
nces in this document before we proceed on it in IDR any further.</div><div=
 class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fo=
nt-size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:=
arial,helvetica,sans-serif;font-size:small">Cheers,</div><div class=3D"gmai=
l_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"=
>Robert.</div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif;font-size:small"><br></div></div>

--089e082fe404551112055f301e5e--


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Date: Thu, 30 Nov 2017 02:20:11 -0800
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: Robert Raszuk <robert@raszuk.net>, idr wg <idr@ietf.org>
CC: "mpls@ietf.org" <mpls@ietf.org>
Message-ID: <B119A283-577B-4349-9AAE-40B00C67C745@gmail.com>
Thread-Topic: [Idr] draft-ietf-idr-eag-distribution-05.txt
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Subject: Re: [Idr] draft-ietf-idr-eag-distribution-05.txt
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Robert,

=20

The draft provides BGP-LS facility for RFC7308 that extends RFCs 3630 and 5=
305 (AG->EAG), aka link coloring, nothing to do with BW reservations or pack=
et prioritization.

RFC7308 was necessary to provide interoperable solution, if I recall correc=
tly, around 2013, in order to signal EAGs - Junos was using TLV138 while XR =
Sub-TLV 252. Your comment about modifications needed is about 5 years late=E2=80=
=A6

There was a need for more than 32, that came in a form of feature requests =
=E2=98=BA

You might not believe it =E2=80=93 but there are still networks running RSVP-TE a=
t a rather large scale.

=20

I agree =E2=80=93 a wider look is necessary, but BGP-LS might not be the first pl=
ace to start.

=20

Hope this clarifies.

=20

Thanks,

Jeff

From: Idr <idr-bounces@ietf.org> on behalf of Robert Raszuk <robert@raszuk.=
net>
Date: Thursday, November 30, 2017 at 01:46
To: idr wg <idr@ietf.org>
Cc: "mpls@ietf.org" <mpls@ietf.org>
Subject: [Idr] draft-ietf-idr-eag-distribution-05.txt

=20

/* While the draft is in IDR I am adding MPLS WG here as the discussion is =
really about MPLS-TE and not BGP */

=20

Hi,

=20

I looked at draft-ietf-idr-eag-distribution-05.txt and would like to share =
few comments on it.=20

=20

The draft defines extension to BGP-LS in order for the node to signal exten=
ded admin groups of a links in the TE domain relaxing the current limit of 3=
2 bits.=20

=20

Observations:

=20

1. Is the draft only applicable to MPLS-TE or also to SR networks ? If the =
latter the title needs to be changed.=20

=20

2. While it is usually considered good to have more then less of anything l=
et's look at the bigger picture and the consequences of this proposal in res=
pect to its current applicability of MPLS-TE:=20

=20

Signalling of 32 affinity bits of the link is just a tiny piece of the full=
 picture. In MPLS-TE networks those bits are signaled in SESSION_ATTRIBUTE o=
f RSVP-PATH msg as defined in RFC3209 section 4.7

=20

Signalling more then 32 bits will just not fit the current space hence fund=
amental set of RSVP-TE (aka MPLS-TE) operation are broken.=20

=20

Likewise most of the CSPF implementations would also need to modified to ac=
comodate for BGP signalled extened affinity bits.=20

=20

IMO if there is real need to have more then 32 admin groups per link in a T=
E domain the right process would be to extend IGP as well as RSVP-TE RFCs fo=
r it.=20

=20

Moreover as we know RSVP-TE or SR-TE while can steer packets via constraine=
d paths do not guarantee any interface level reservations or packet prioriti=
zation. Those are control plane driven features.=20

=20

As such one could also notice that with the extened set of link affinity cl=
asses there is real need to also extend QoS of each network element to offer=
 more then 32 diffserv classes. Otherwise in the event of congestion it is l=
ikely that packets assumed to be classified into one admin group will likely=
 compete for bandwith in the same queue with packets classified into differe=
nt group.

=20

So while I do not have concerns to define such TLV in BGP-LS I do have bigg=
er picture observations which I believe need to be addressed and need to bec=
ome formal references in this document before we proceed on it in IDR any fu=
rther.

=20

Cheers,

Robert.

=20

_______________________________________________ Idr mailing list Idr@ietf.o=
rg https://www.ietf.org/mailman/listinfo/idr=20


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s-microsoft-com:office:word" xmlns:m=3D"http://schemas.microsoft.com/office/20=
04/12/omml" xmlns=3D"http://www.w3.org/TR/REC-html40"><head><meta name=3DTitle c=
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--></style></head><body bgcolor=3Dwhite lang=3DEN-US link=3D"#0563C1" vlink=3D"#954=
F72"><div class=3DWordSection1><p class=3DMsoNormal><span style=3D'font-size:14.0p=
t'>Robert,<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:14=
.0pt'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:=
14.0pt'>The draft provides BGP-LS facility for RFC7308 that extends RFCs 363=
0 and 5305 (AG-&gt;EAG), aka link coloring, nothing to do with BW reservatio=
ns or packet prioritization.<o:p></o:p></span></p><p class=3DMsoNormal><span s=
tyle=3D'font-size:14.0pt'>RFC7308 was necessary to provide interoperable solut=
ion, if I recall correctly, around 2013, in order to signal EAGs - Junos was=
 using TLV138 while XR Sub-TLV 252. Your comment about modifications needed =
is about 5 years late=E2=80=A6<o:p></o:p></span></p><p class=3DMsoNormal><span style=
=3D'font-size:14.0pt'>There was a need for more than 32, that came in a form o=
f feature requests </span><span style=3D'font-size:14.0pt;font-family:"Apple C=
olor Emoji"'>=E2=98=BA</span><span style=3D'font-size:14.0pt'><o:p></o:p></span></p>=
<p class=3DMsoNormal><span style=3D'font-size:14.0pt'>You might not believe it =E2=
=80=93 but there are still networks running RSVP-TE at a rather large scale.<o:p=
></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:14.0pt'><o:p>&nb=
sp;</o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:14.0pt'>I agre=
e =E2=80=93 a wider look is necessary, but BGP-LS might not be the first place to =
start.<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:14.0pt=
'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:14.0=
pt'>Hope this clarifies.<o:p></o:p></span></p><p class=3DMsoNormal><span style=
=3D'font-size:14.0pt'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span sty=
le=3D'font-size:14.0pt'>Thanks,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:14.0pt'>Jeff<o:p></o:p></span></p><div style=3D'border:none;b=
order-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal =
style=3D'margin-left:.5in'><b><span style=3D'font-size:12.0pt;color:black'>From:=
 </span></b><span style=3D'font-size:12.0pt;color:black'>Idr &lt;idr-bounces@i=
etf.org&gt; on behalf of Robert Raszuk &lt;robert@raszuk.net&gt;<br><b>Date:=
 </b>Thursday, November 30, 2017 at 01:46<br><b>To: </b>idr wg &lt;idr@ietf.=
org&gt;<br><b>Cc: </b>&quot;mpls@ietf.org&quot; &lt;mpls@ietf.org&gt;<br><b>=
Subject: </b>[Idr] draft-ietf-idr-eag-distribution-05.txt<o:p></o:p></span><=
/p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><o:p>&nbsp;</o:p><=
/p></div><div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'=
font-size:12.0pt;font-family:"Arial",sans-serif'>/* While the draft is in ID=
R I am adding MPLS WG here as the discussion is really about MPLS-TE and not=
 BGP */<o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-lef=
t:.5in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&=
nbsp;</o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'=
><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>Hi,<o:p></o:p=
></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span sty=
le=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></span=
></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'fon=
t-size:12.0pt;font-family:"Arial",sans-serif'>I looked at&nbsp;draft-ietf-id=
r-eag-distribution-05.txt and would like to share few comments on it.&nbsp;<=
o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'>=
<span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o=
:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span s=
tyle=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>The draft defines ext=
ension to BGP-LS in order for the node to signal extended admin groups of a =
links in the TE domain relaxing the current limit of 32 bits.&nbsp;<o:p></o:=
p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span st=
yle=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></spa=
n></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'fo=
nt-size:12.0pt;font-family:"Arial",sans-serif'>Observations:<o:p></o:p></spa=
n></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'fo=
nt-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></span></p><=
/div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font-size=
:12.0pt;font-family:"Arial",sans-serif'>1. Is the draft only applicable to M=
PLS-TE or also to SR networks ? If the latter the title needs to be changed.=
&nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left=
:.5in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&n=
bsp;</o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'>=
<span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>2. While it is=
 usually considered good to have more then less of anything let's look at th=
e bigger picture and the consequences of this proposal in respect to its cur=
rent applicability of MPLS-TE:&nbsp;<o:p></o:p></span></p></div><div><p clas=
s=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font-size:12.0pt;font-fami=
ly:"Arial",sans-serif'><o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNo=
rmal style=3D'margin-left:.5in'><span style=3D'font-size:12.0pt;font-family:"Ari=
al",sans-serif'>Signalling of 32 affinity bits of the link is just a tiny pi=
ece of the full picture. In MPLS-TE networks those bits are signaled in SESS=
ION_ATTRIBUTE of RSVP-PATH msg as defined in RFC3209 section 4.7<o:p></o:p><=
/span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=
=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></span><=
/p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font-=
size:12.0pt;font-family:"Arial",sans-serif'>Signalling more then 32 bits wil=
l just not fit the current space hence fundamental set of RSVP-TE (aka MPLS-=
TE) operation are broken.&nbsp;<o:p></o:p></span></p></div><div><p class=3DMso=
Normal style=3D'margin-left:.5in'><span style=3D'font-size:12.0pt;font-family:"A=
rial",sans-serif'><o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal =
style=3D'margin-left:.5in'><span style=3D'font-size:12.0pt;font-family:"Arial",s=
ans-serif'>Likewise most of the CSPF implementations would also need to modi=
fied to accomodate for BGP signalled extened affinity bits.&nbsp;<o:p></o:p>=
</span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span styl=
e=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></span>=
</p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font=
-size:12.0pt;font-family:"Arial",sans-serif'>IMO if there is real need to ha=
ve more then 32 admin groups per link in a TE domain the right process would=
 be to extend IGP as well as RSVP-TE RFCs for it.&nbsp;<o:p></o:p></span></p=
></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font-si=
ze:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></span></p></div>=
<div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font-size:12.0=
pt;font-family:"Arial",sans-serif'>Moreover as we know RSVP-TE or SR-TE whil=
e can steer packets via constrained paths do not guarantee any interface lev=
el reservations or packet prioritization. Those are control plane driven fea=
tures.&nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'margi=
n-left:.5in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><=
o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:=
.5in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>As such =
one could also notice that with the extened set of link affinity classes the=
re is real need to also extend QoS of each network element to offer more the=
n 32 diffserv classes. Otherwise in the event of congestion it is likely tha=
t packets assumed to be classified into one admin group will likely compete =
for bandwith in the same queue with packets classified into different group.=
<o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'=
><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</=
o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span =
style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>So while I do not ha=
ve concerns to define such TLV in BGP-LS I do have bigger picture observatio=
ns which I believe need to be addressed and need to become formal references=
 in this document before we proceed on it in IDR any further.<o:p></o:p></sp=
an></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'f=
ont-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></span></p>=
</div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font-siz=
e:12.0pt;font-family:"Arial",sans-serif'>Cheers,<o:p></o:p></span></p></div>=
<div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font-size:12.0=
pt;font-family:"Arial",sans-serif'>Robert.<o:p></o:p></span></p></div><div><=
p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font-size:12.0pt;fon=
t-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></span></p></div></div><p clas=
s=3DMsoNormal style=3D'margin-left:.5in'>_______________________________________=
________ Idr mailing list Idr@ietf.org https://www.ietf.org/mailman/listinfo=
/idr <o:p></o:p></p></div></body></html>

--B_3594853212_1744931488--



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From: Robert Raszuk <robert@raszuk.net>
Date: Thu, 30 Nov 2017 15:13:28 +0100
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To: Jeff Tantsura <jefftant.ietf@gmail.com>
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Subject: Re: [Idr] draft-ietf-idr-eag-distribution-05.txt
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Jeff,

Both RFC3630 & RFC5305 define 4 octet administrative groups. I just checked
and non of them is updated formally by RFC7308.

My comment applies equally to RFC7308 and to your draft. It is really not
my fault that RFC7308 went through as is.

Defining only extension for longer then 4 octets admin groups for
interfaces in an MPLS-TE domain is presenting myopic view on how those
extensions are to be used in practice within SESSION_ATTRIBUTE object.

If you say that your extension are to be used only by controller I rest my
case. But as written today they can not just work in practice with base
RSVP-TE specification.

Best,
R.

PS. The comments about lack of bw reservation and qos was not related to yr
draft. It was to provide bigger picture of the problem at hand. But you are
welcome to disregard it :).





On Thu, Nov 30, 2017 at 11:20 AM, Jeff Tantsura <jefftant.ietf@gmail.com>
wrote:

> Robert,
>
>
>
> The draft provides BGP-LS facility for RFC7308 that extends RFCs 3630 and
> 5305 (AG->EAG), aka link coloring, nothing to do with BW reservations or
> packet prioritization.
>
> RFC7308 was necessary to provide interoperable solution, if I recall
> correctly, around 2013, in order to signal EAGs - Junos was using TLV138
> while XR Sub-TLV 252. Your comment about modifications needed is about 5
> years late=E2=80=A6
>
> There was a need for more than 32, that came in a form of feature request=
s
> =E2=98=BA
>
> You might not believe it =E2=80=93 but there are still networks running R=
SVP-TE at
> a rather large scale.
>
>
>
> I agree =E2=80=93 a wider look is necessary, but BGP-LS might not be the =
first
> place to start.
>
>
>
> Hope this clarifies.
>
>
>
> Thanks,
>
> Jeff
>
> *From: *Idr <idr-bounces@ietf.org> on behalf of Robert Raszuk <
> robert@raszuk.net>
> *Date: *Thursday, November 30, 2017 at 01:46
> *To: *idr wg <idr@ietf.org>
> *Cc: *"mpls@ietf.org" <mpls@ietf.org>
> *Subject: *[Idr] draft-ietf-idr-eag-distribution-05.txt
>
>
>
> /* While the draft is in IDR I am adding MPLS WG here as the discussion i=
s
> really about MPLS-TE and not BGP */
>
>
>
> Hi,
>
>
>
> I looked at draft-ietf-idr-eag-distribution-05.txt and would like to
> share few comments on it.
>
>
>
> The draft defines extension to BGP-LS in order for the node to signal
> extended admin groups of a links in the TE domain relaxing the current
> limit of 32 bits.
>
>
>
> Observations:
>
>
>
> 1. Is the draft only applicable to MPLS-TE or also to SR networks ? If th=
e
> latter the title needs to be changed.
>
>
>
> 2. While it is usually considered good to have more then less of anything
> let's look at the bigger picture and the consequences of this proposal in
> respect to its current applicability of MPLS-TE:
>
>
>
> Signalling of 32 affinity bits of the link is just a tiny piece of the
> full picture. In MPLS-TE networks those bits are signaled in
> SESSION_ATTRIBUTE of RSVP-PATH msg as defined in RFC3209 section 4.7
>
>
>
> Signalling more then 32 bits will just not fit the current space hence
> fundamental set of RSVP-TE (aka MPLS-TE) operation are broken.
>
>
>
> Likewise most of the CSPF implementations would also need to modified to
> accomodate for BGP signalled extened affinity bits.
>
>
>
> IMO if there is real need to have more then 32 admin groups per link in a
> TE domain the right process would be to extend IGP as well as RSVP-TE RFC=
s
> for it.
>
>
>
> Moreover as we know RSVP-TE or SR-TE while can steer packets via
> constrained paths do not guarantee any interface level reservations or
> packet prioritization. Those are control plane driven features.
>
>
>
> As such one could also notice that with the extened set of link affinity
> classes there is real need to also extend QoS of each network element to
> offer more then 32 diffserv classes. Otherwise in the event of congestion
> it is likely that packets assumed to be classified into one admin group
> will likely compete for bandwith in the same queue with packets classifie=
d
> into different group.
>
>
>
> So while I do not have concerns to define such TLV in BGP-LS I do have
> bigger picture observations which I believe need to be addressed and need
> to become formal references in this document before we proceed on it in I=
DR
> any further.
>
>
>
> Cheers,
>
> Robert.
>
>
>
> _______________________________________________ Idr mailing list
> Idr@ietf.org https://www.ietf.org/mailman/listinfo/idr
>

--001a11424216333691055f33db87
Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Jeff,</div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></div=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:small">Both RFC3630 &amp; RFC5305 define 4 octet administrativ=
e groups. I just checked and non of them is updated formally by RFC7308.=C2=
=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small">My comment applies=
 equally to RFC7308 and to your draft. It is really not my fault that RFC73=
08 went through as is.=C2=A0</div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small">Defining only extension for longer then 4 octets admin groups for =
interfaces in an MPLS-TE domain is presenting myopic view on how those exte=
nsions are to be used in practice within SESSION_ATTRIBUTE object.=C2=A0</d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small">If you say that your ext=
ension are to be used only by controller I rest my case. But as written tod=
ay they can not just work in practice with base RSVP-TE specification.=C2=
=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,=
sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D=
"font-family:arial,helvetica,sans-serif;font-size:small">Best,</div><div cl=
ass=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-=
size:small">R.</div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">PS. The=
 comments about lack of bw reservation and qos was not related to yr draft.=
 It was to provide bigger picture of the problem at hand. But you are welco=
me to disregard it :).=C2=A0</div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_default=
" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></di=
v><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu, Nov 30,=
 2017 at 11:20 AM, Jeff Tantsura <span dir=3D"ltr">&lt;<a href=3D"mailto:je=
fftant.ietf@gmail.com" target=3D"_blank">jefftant.ietf@gmail.com</a>&gt;</s=
pan> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex=
;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor=3D"white" lang=
=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72"><div class=3D"m_6261680831137=
081567m_-7827509696150584290WordSection1"><p class=3D"MsoNormal"><span styl=
e=3D"font-size:14.0pt">Robert,<u></u><u></u></span></p><p class=3D"MsoNorma=
l"><span style=3D"font-size:14.0pt"><u></u>=C2=A0<u></u></span></p><p class=
=3D"MsoNormal"><span style=3D"font-size:14.0pt">The draft provides BGP-LS f=
acility for RFC7308 that extends RFCs 3630 and 5305 (AG-&gt;EAG), aka link =
coloring, nothing to do with BW reservations or packet prioritization.<u></=
u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt"=
>RFC7308 was necessary to provide interoperable solution, if I recall corre=
ctly, around 2013, in order to signal EAGs - Junos was using TLV138 while X=
R Sub-TLV 252. Your comment about modifications needed is about 5 years lat=
e=E2=80=A6<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"fo=
nt-size:14.0pt">There was a need for more than 32, that came in a form of f=
eature requests </span><span style=3D"font-size:14.0pt;font-family:&quot;Ap=
ple Color Emoji&quot;">=E2=98=BA</span><span style=3D"font-size:14.0pt"><u>=
</u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0p=
t">You might not believe it =E2=80=93 but there are still networks running =
RSVP-TE at a rather large scale.<u></u><u></u></span></p><p class=3D"MsoNor=
mal"><span style=3D"font-size:14.0pt"><u></u>=C2=A0<u></u></span></p><p cla=
ss=3D"MsoNormal"><span style=3D"font-size:14.0pt">I agree =E2=80=93 a wider=
 look is necessary, but BGP-LS might not be the first place to start.<u></u=
><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt">=
<u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-s=
ize:14.0pt">Hope this clarifies.<u></u><u></u></span></p><p class=3D"MsoNor=
mal"><span style=3D"font-size:14.0pt"><u></u>=C2=A0<u></u></span></p><p cla=
ss=3D"MsoNormal"><span style=3D"font-size:14.0pt">Thanks,<u></u><u></u></sp=
an></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt">Jeff<u></u><=
u></u></span></p><div style=3D"border:none;border-top:solid #b5c4df 1.0pt;p=
adding:3.0pt 0in 0in 0in"><p class=3D"MsoNormal" style=3D"margin-left:.5in"=
><b><span style=3D"font-size:12.0pt;color:black">From: </span></b><span sty=
le=3D"font-size:12.0pt;color:black">Idr &lt;<a href=3D"mailto:idr-bounces@i=
etf.org" target=3D"_blank">idr-bounces@ietf.org</a>&gt; on behalf of Robert=
 Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D"_blank">robert@r=
aszuk.net</a>&gt;<br><b>Date: </b>Thursday, November 30, 2017 at 01:46<br><=
b>To: </b>idr wg &lt;<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@=
ietf.org</a>&gt;<br><b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" targe=
t=3D"_blank">mpls@ietf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" t=
arget=3D"_blank">mpls@ietf.org</a>&gt;<br><b>Subject: </b>[Idr] draft-ietf-=
idr-eag-distributio<wbr>n-05.txt<u></u><u></u></span></p></div><div><div cl=
ass=3D"m_6261680831137081567h5"><div><p class=3D"MsoNormal" style=3D"margin=
-left:.5in"><u></u>=C2=A0<u></u></p></div><div><div><p class=3D"MsoNormal" =
style=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;font-family:&quo=
t;Arial&quot;,sans-serif">/* While the draft is in IDR I am adding MPLS WG =
here as the discussion is really about MPLS-TE and not BGP */<u></u><u></u>=
</span></p></div><div><p class=3D"MsoNormal" style=3D"margin-left:.5in"><sp=
an style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u><=
/u>=C2=A0<u></u></span></p></div><div><p class=3D"MsoNormal" style=3D"margi=
n-left:.5in"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,=
sans-serif">Hi,<u></u><u></u></span></p></div><div><p class=3D"MsoNormal" s=
tyle=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;font-family:&quot=
;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p></div><div><p class=
=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;f=
ont-family:&quot;Arial&quot;,sans-serif">I looked at=C2=A0draft-ietf-idr-ea=
g-distribu<wbr>tion-05.txt and would like to share few comments on it.=C2=
=A0<u></u><u></u></span></p></div><div><p class=3D"MsoNormal" style=3D"marg=
in-left:.5in"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;=
,sans-serif"><u></u>=C2=A0<u></u></span></p></div><div><p class=3D"MsoNorma=
l" style=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;font-family:&=
quot;Arial&quot;,sans-serif">The draft defines extension to BGP-LS in order=
 for the node to signal extended admin groups of a links in the TE domain r=
elaxing the current limit of 32 bits.=C2=A0<u></u><u></u></span></p></div><=
div><p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-s=
ize:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></=
span></p></div><div><p class=3D"MsoNormal" style=3D"margin-left:.5in"><span=
 style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">Observ=
ations:<u></u><u></u></span></p></div><div><p class=3D"MsoNormal" style=3D"=
margin-left:.5in"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&q=
uot;,sans-serif"><u></u>=C2=A0<u></u></span></p></div><div><p class=3D"MsoN=
ormal" style=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;font-fami=
ly:&quot;Arial&quot;,sans-serif">1. Is the draft only applicable to MPLS-TE=
 or also to SR networks ? If the latter the title needs to be changed.=C2=
=A0<u></u><u></u></span></p></div><div><p class=3D"MsoNormal" style=3D"marg=
in-left:.5in"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;=
,sans-serif"><u></u>=C2=A0<u></u></span></p></div><div><p class=3D"MsoNorma=
l" style=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;font-family:&=
quot;Arial&quot;,sans-serif">2. While it is usually considered good to have=
 more then less of anything let&#39;s look at the bigger picture and the co=
nsequences of this proposal in respect to its current applicability of MPLS=
-TE:=C2=A0<u></u><u></u></span></p></div><div><p class=3D"MsoNormal" style=
=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;font-family:&quot;Ari=
al&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p></div><div><p class=3D"=
MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;font-=
family:&quot;Arial&quot;,sans-serif">Signalling of 32 affinity bits of the =
link is just a tiny piece of the full picture. In MPLS-TE networks those bi=
ts are signaled in SESSION_ATTRIBUTE of RSVP-PATH msg as defined in RFC3209=
 section 4.7<u></u><u></u></span></p></div><div><p class=3D"MsoNormal" styl=
e=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p></div><div><p class=3D=
"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;font=
-family:&quot;Arial&quot;,sans-serif">Signalling more then 32 bits will jus=
t not fit the current space hence fundamental set of RSVP-TE (aka MPLS-TE) =
operation are broken.=C2=A0<u></u><u></u></span></p></div><div><p class=3D"=
MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;font-=
family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p></div><=
div><p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-s=
ize:12.0pt;font-family:&quot;Arial&quot;,sans-serif">Likewise most of the C=
SPF implementations would also need to modified to accomodate for BGP signa=
lled extened affinity bits.=C2=A0<u></u><u></u></span></p></div><div><p cla=
ss=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:12.0pt=
;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p><=
/div><div><p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"=
font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">IMO if there is =
real need to have more then 32 admin groups per link in a TE domain the rig=
ht process would be to extend IGP as well as RSVP-TE RFCs for it.=C2=A0<u><=
/u><u></u></span></p></div><div><p class=3D"MsoNormal" style=3D"margin-left=
:.5in"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-s=
erif"><u></u>=C2=A0<u></u></span></p></div><div><p class=3D"MsoNormal" styl=
e=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;font-family:&quot;Ar=
ial&quot;,sans-serif">Moreover as we know RSVP-TE or SR-TE while can steer =
packets via constrained paths do not guarantee any interface level reservat=
ions or packet prioritization. Those are control plane driven features.=C2=
=A0<u></u><u></u></span></p></div><div><p class=3D"MsoNormal" style=3D"marg=
in-left:.5in"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;=
,sans-serif"><u></u>=C2=A0<u></u></span></p></div><div><p class=3D"MsoNorma=
l" style=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;font-family:&=
quot;Arial&quot;,sans-serif">As such one could also notice that with the ex=
tened set of link affinity classes there is real need to also extend QoS of=
 each network element to offer more then 32 diffserv classes. Otherwise in =
the event of congestion it is likely that packets assumed to be classified =
into one admin group will likely compete for bandwith in the same queue wit=
h packets classified into different group.<u></u><u></u></span></p></div><d=
iv><p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-si=
ze:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=A0<u></u></s=
pan></p></div><div><p class=3D"MsoNormal" style=3D"margin-left:.5in"><span =
style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif">So whil=
e I do not have concerns to define such TLV in BGP-LS I do have bigger pict=
ure observations which I believe need to be addressed and need to become fo=
rmal references in this document before we proceed on it in IDR any further=
.<u></u><u></u></span></p></div><div><p class=3D"MsoNormal" style=3D"margin=
-left:.5in"><span style=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,s=
ans-serif"><u></u>=C2=A0<u></u></span></p></div><div><p class=3D"MsoNormal"=
 style=3D"margin-left:.5in"><span style=3D"font-size:12.0pt;font-family:&qu=
ot;Arial&quot;,sans-serif">Cheers,<u></u><u></u></span></p></div><div><p cl=
ass=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:12.0p=
t;font-family:&quot;Arial&quot;,sans-serif">Robert.<u></u><u></u></span></p=
></div><div><p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=
=3D"font-size:12.0pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=C2=
=A0<u></u></span></p></div></div></div></div><p class=3D"MsoNormal" style=
=3D"margin-left:.5in">______________________________<wbr>_________________ =
Idr mailing list <a href=3D"mailto:Idr@ietf.org" target=3D"_blank">Idr@ietf=
.org</a> <a href=3D"https://www.ietf.org/mailman/listinfo/idr" target=3D"_b=
lank">https://www.ietf.org/mailman/l<wbr>istinfo/idr</a> <u></u><u></u></p>=
</div></div>
</blockquote></div><br></div></div>

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Date: Thu, 30 Nov 2017 06:54:40 -0800
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: Robert Raszuk <robert@raszuk.net>
CC: idr wg <idr@ietf.org>, "mpls@ietf.org" <mpls@ietf.org>
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Robert,

=20

Thanks for your comments, please see inline

=20

Cheers,

Jeff

=20

From: <rraszuk@gmail.com> on behalf of Robert Raszuk <robert@raszuk.net>
Date: Thursday, November 30, 2017 at 06:13
To: Jeff Tantsura <jefftant.ietf@gmail.com>
Cc: idr wg <idr@ietf.org>, "mpls@ietf.org" <mpls@ietf.org>
Subject: Re: [Idr] draft-ietf-idr-eag-distribution-05.txt

=20

Jeff,

=20

Both RFC3630 & RFC5305 define 4 octet administrative groups. I just checked=
 and non of them is updated formally by RFC7308.=20

[jeff] it doesn=E2=80=99t, it extends

=20

My comment applies equally to RFC7308 and to your draft. It is really not m=
y fault that RFC7308 went through as is.=20

[jeff] there should be 6-7 implementations of 7308 in the shipping products=
.

=20

Defining only extension for longer then 4 octets admin groups for interface=
s in an MPLS-TE domain is presenting myopic view on how those extensions are=
 to be used in practice within SESSION_ATTRIBUTE object.=20

[jeff] you are mixing state distribution with LSP setup=E2=80=A6 color(bitmask) i=
s a property of a link and on itself has nothing to do with RSVP-TE. The nam=
e of 7308 reflects realities of the time it was written, however.. it is not=
 limited to.

=20

If you say that your extension are to be used only by controller I rest my =
case. But as written today they can not just work in practice with base RSVP=
-TE specification.=20

[jeff] AG/EAG provide additional meta-data about the link in a graph and co=
uld be used by any consumer of that data, being PCE/SDNc/any_cool_acronym_of=
_the_day=20

=20

Best,

R.

=20

PS. The comments about lack of bw reservation and qos was not related to yr=
 draft. It was to provide bigger picture of the problem at hand. But you are=
 welcome to disregard it :).=20

[jeff] I really appreciate your comments and don=E2=80=99t mean to disregard them=
, resolution of color semantics could be done in any way to express business=
 logic

=20

=20

=20

=20

=20

On Thu, Nov 30, 2017 at 11:20 AM, Jeff Tantsura <jefftant.ietf@gmail.com> w=
rote:

Robert,

=20

The draft provides BGP-LS facility for RFC7308 that extends RFCs 3630 and 5=
305 (AG->EAG), aka link coloring, nothing to do with BW reservations or pack=
et prioritization.

RFC7308 was necessary to provide interoperable solution, if I recall correc=
tly, around 2013, in order to signal EAGs - Junos was using TLV138 while XR =
Sub-TLV 252. Your comment about modifications needed is about 5 years late=E2=80=
=A6

There was a need for more than 32, that came in a form of feature requests =
=E2=98=BA

You might not believe it =E2=80=93 but there are still networks running RSVP-TE a=
t a rather large scale.

=20

I agree =E2=80=93 a wider look is necessary, but BGP-LS might not be the first pl=
ace to start.

=20

Hope this clarifies.

=20

Thanks,

Jeff

From: Idr <idr-bounces@ietf.org> on behalf of Robert Raszuk <robert@raszuk.=
net>
Date: Thursday, November 30, 2017 at 01:46
To: idr wg <idr@ietf.org>
Cc: "mpls@ietf.org" <mpls@ietf.org>
Subject: [Idr] draft-ietf-idr-eag-distribution-05.txt

=20

/* While the draft is in IDR I am adding MPLS WG here as the discussion is =
really about MPLS-TE and not BGP */

=20

Hi,

=20

I looked at draft-ietf-idr-eag-distribution-05.txt and would like to share =
few comments on it.=20

=20

The draft defines extension to BGP-LS in order for the node to signal exten=
ded admin groups of a links in the TE domain relaxing the current limit of 3=
2 bits.=20

=20

Observations:

=20

1. Is the draft only applicable to MPLS-TE or also to SR networks ? If the =
latter the title needs to be changed.=20

=20

2. While it is usually considered good to have more then less of anything l=
et's look at the bigger picture and the consequences of this proposal in res=
pect to its current applicability of MPLS-TE:=20

=20

Signalling of 32 affinity bits of the link is just a tiny piece of the full=
 picture. In MPLS-TE networks those bits are signaled in SESSION_ATTRIBUTE o=
f RSVP-PATH msg as defined in RFC3209 section 4.7

=20

Signalling more then 32 bits will just not fit the current space hence fund=
amental set of RSVP-TE (aka MPLS-TE) operation are broken.=20

=20

Likewise most of the CSPF implementations would also need to modified to ac=
comodate for BGP signalled extened affinity bits.=20

=20

IMO if there is real need to have more then 32 admin groups per link in a T=
E domain the right process would be to extend IGP as well as RSVP-TE RFCs fo=
r it.=20

=20

Moreover as we know RSVP-TE or SR-TE while can steer packets via constraine=
d paths do not guarantee any interface level reservations or packet prioriti=
zation. Those are control plane driven features.=20

=20

As such one could also notice that with the extened set of link affinity cl=
asses there is real need to also extend QoS of each network element to offer=
 more then 32 diffserv classes. Otherwise in the event of congestion it is l=
ikely that packets assumed to be classified into one admin group will likely=
 compete for bandwith in the same queue with packets classified into differe=
nt group.

=20

So while I do not have concerns to define such TLV in BGP-LS I do have bigg=
er picture observations which I believe need to be addressed and need to bec=
ome formal references in this document before we proceed on it in IDR any fu=
rther.

=20

Cheers,

Robert.

=20

_______________________________________________ Idr mailing list Idr@ietf.o=
rg https://www.ietf.org/mailman/listinfo/idr=20

=20


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--></style></head><body bgcolor=3Dwhite lang=3DEN-US link=3Dblue vlink=3Dpurple><di=
v class=3DWordSection1><p class=3DMsoNormal><span style=3D'font-size:14.0pt'>Rober=
t,<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:14.0pt'><o=
:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:14.0pt'>=
Thanks for your comments, please see inline<o:p></o:p></span></p><p class=3DMs=
oNormal><span style=3D'font-size:14.0pt'><o:p>&nbsp;</o:p></span></p><div><p c=
lass=3DMsoNormal><span style=3D'font-size:10.5pt;color:black'>Cheers,<o:p></o:p>=
</span></p></div><p class=3DMsoNormal><span style=3D'font-size:10.5pt;color:blac=
k'>Jeff</span><span style=3D'font-size:14.0pt'><o:p></o:p></span></p><p class=3D=
MsoNormal><span style=3D'font-size:14.0pt'><o:p>&nbsp;</o:p></span></p><div st=
yle=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><=
p class=3DMsoNormal style=3D'margin-left:.5in'><b><span style=3D'font-size:12.0pt;=
color:black'>From: </span></b><span style=3D'font-size:12.0pt;color:black'>&lt=
;rraszuk@gmail.com&gt; on behalf of Robert Raszuk &lt;robert@raszuk.net&gt;<=
br><b>Date: </b>Thursday, November 30, 2017 at 06:13<br><b>To: </b>Jeff Tant=
sura &lt;jefftant.ietf@gmail.com&gt;<br><b>Cc: </b>idr wg &lt;idr@ietf.org&g=
t;, &quot;mpls@ietf.org&quot; &lt;mpls@ietf.org&gt;<br><b>Subject: </b>Re: [=
Idr] draft-ietf-idr-eag-distribution-05.txt<o:p></o:p></span></p></div><div>=
<p class=3DMsoNormal style=3D'margin-left:.5in'><o:p>&nbsp;</o:p></p></div><div>=
<div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font-size:12.0=
pt;font-family:"Arial",sans-serif'>Jeff,<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font-size:12.0pt;font-=
family:"Arial",sans-serif'><o:p>&nbsp;</o:p></span></p></div><div><p class=3DM=
soNormal style=3D'margin-left:.5in'><span style=3D'font-size:12.0pt;font-family:=
"Arial",sans-serif'>Both RFC3630 &amp; RFC5305 define 4 octet administrative=
 groups. I just checked and non of them is updated formally by RFC7308.&nbsp=
;<o:p></o:p></span></p><p class=3DMsoNormal style=3D'margin-left:.5in'><span sty=
le=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>[jeff] it doesn=E2=80=99t, it=
 extends<o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-le=
ft:.5in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p>=
&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in=
'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>My comment a=
pplies equally to RFC7308 and to your draft. It is really not my fault that =
RFC7308 went through as is.&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal st=
yle=3D'margin-left:.5in'><span style=3D'font-size:12.0pt;font-family:"Arial",san=
s-serif'>[jeff] there should be 6-7 implementations of 7308 in the shipping =
products.<o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-l=
eft:.5in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p=
>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5i=
n'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>Defining on=
ly extension for longer then 4 octets admin groups for interfaces in an MPLS=
-TE domain is presenting myopic view on how those extensions are to be used =
in practice within SESSION_ATTRIBUTE object.&nbsp;<o:p></o:p></span></p><p c=
lass=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font-size:12.0pt;font-f=
amily:"Arial",sans-serif'>[jeff] you are mixing state distribution with LSP =
setup=E2=80=A6 color(bitmask) is a property of a link and on itself has nothing to=
 do with RSVP-TE. The name of 7308 reflects realities of the time it was wri=
tten, however.. it is not limited to.<o:p></o:p></span></p></div><div><p cla=
ss=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font-size:12.0pt;font-fam=
ily:"Arial",sans-serif'><o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoN=
ormal style=3D'margin-left:.5in'><span style=3D'font-size:12.0pt;font-family:"Ar=
ial",sans-serif'>If you say that your extension are to be used only by contr=
oller I rest my case. But as written today they can not just work in practic=
e with base RSVP-TE specification.&nbsp;<o:p></o:p></span></p><p class=3DMsoNo=
rmal style=3D'margin-left:.5in'><span style=3D'font-size:12.0pt;font-family:"Ari=
al",sans-serif'>[jeff] AG/EAG provide additional meta-data about the link in=
 a graph and could be used by any consumer of that data, being PCE/SDNc/any_=
cool_acronym_of_the_day <o:p></o:p></span></p></div><div><p class=3DMsoNormal =
style=3D'margin-left:.5in'><span style=3D'font-size:12.0pt;font-family:"Arial",s=
ans-serif'><o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal style=3D'=
margin-left:.5in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-ser=
if'>Best,<o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-l=
eft:.5in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>R.<o=
:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><=
span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:=
p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span st=
yle=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>PS. The comments about=
 lack of bw reservation and qos was not related to yr draft. It was to provi=
de bigger picture of the problem at hand. But you are welcome to disregard i=
t :).&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal style=3D'margin-left:.5in'=
><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>[jeff] I real=
ly appreciate your comments and don=E2=80=99t mean to disregard them, resolution o=
f color semantics could be done in any way to express business logic<o:p></o=
:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span s=
tyle=3D'font-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></sp=
an></p></div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'f=
ont-size:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></span></p>=
</div><div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font-siz=
e:12.0pt;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></span></p></div><=
div><p class=3DMsoNormal style=3D'margin-left:.5in'><span style=3D'font-size:12.0p=
t;font-family:"Arial",sans-serif'><o:p>&nbsp;</o:p></span></p></div><div><p =
class=3DMsoNormal style=3D'margin-left:.5in'><o:p>&nbsp;</o:p></p><div><p class=3D=
MsoNormal style=3D'margin-left:.5in'>On Thu, Nov 30, 2017 at 11:20 AM, Jeff Ta=
ntsura &lt;<a href=3D"mailto:jefftant.ietf@gmail.com" target=3D"_blank">jefftant=
.ietf@gmail.com</a>&gt; wrote:<o:p></o:p></p><blockquote style=3D'border:none;=
border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;=
margin-right:0in'><div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:aut=
o;mso-margin-bottom-alt:auto;margin-left:.5in'><span style=3D'font-size:14.0pt=
'>Robert,</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:=
auto;mso-margin-bottom-alt:auto;margin-left:.5in'><span style=3D'font-size:14.=
0pt'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-al=
t:auto;mso-margin-bottom-alt:auto;margin-left:.5in'><span style=3D'font-size:1=
4.0pt'>The draft provides BGP-LS facility for RFC7308 that extends RFCs 3630=
 and 5305 (AG-&gt;EAG), aka link coloring, nothing to do with BW reservation=
s or packet prioritization.</span><o:p></o:p></p><p class=3DMsoNormal style=3D'm=
so-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in'><span st=
yle=3D'font-size:14.0pt'>RFC7308 was necessary to provide interoperable soluti=
on, if I recall correctly, around 2013, in order to signal EAGs - Junos was =
using TLV138 while XR Sub-TLV 252. Your comment about modifications needed i=
s about 5 years late=E2=80=A6</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-m=
argin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in'><span style=3D=
'font-size:14.0pt'>There was a need for more than 32, that came in a form of=
 feature requests </span><span style=3D'font-size:14.0pt;font-family:"Apple Co=
lor Emoji"'>=E2=98=BA</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-to=
p-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in'><span style=3D'font-si=
ze:14.0pt'>You might not believe it =E2=80=93 but there are still networks running=
 RSVP-TE at a rather large scale.</span><o:p></o:p></p><p class=3DMsoNormal st=
yle=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in'><s=
pan style=3D'font-size:14.0pt'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in'>=
<span style=3D'font-size:14.0pt'>I agree =E2=80=93 a wider look is necessary, but BG=
P-LS might not be the first place to start.</span><o:p></o:p></p><p class=3DMs=
oNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-lef=
t:.5in'><span style=3D'font-size:14.0pt'>&nbsp;</span><o:p></o:p></p><p class=3D=
MsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-l=
eft:.5in'><span style=3D'font-size:14.0pt'>Hope this clarifies.</span><o:p></o=
:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:.5in'><span style=3D'font-size:14.0pt'>&nbsp;</span><o:p><=
/o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom=
-alt:auto;margin-left:.5in'><span style=3D'font-size:14.0pt'>Thanks,</span><o:=
p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bot=
tom-alt:auto;margin-left:.5in'><span style=3D'font-size:14.0pt'>Jeff</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=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:auto;margin-left:1.0in'><b><span style=3D'font-size:12.0pt;color=
:black'>From: </span></b><span style=3D'font-size:12.0pt;color:black'>Idr &lt;=
<a href=3D"mailto:idr-bounces@ietf.org" target=3D"_blank">idr-bounces@ietf.org</=
a>&gt; on behalf of Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" tar=
get=3D"_blank">robert@raszuk.net</a>&gt;<br><b>Date: </b>Thursday, November 30=
, 2017 at 01:46<br><b>To: </b>idr wg &lt;<a href=3D"mailto:idr@ietf.org" targe=
t=3D"_blank">idr@ietf.org</a>&gt;<br><b>Cc: </b>&quot;<a href=3D"mailto:mpls@iet=
f.org" target=3D"_blank">mpls@ietf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf=
.org" target=3D"_blank">mpls@ietf.org</a>&gt;<br><b>Subject: </b>[Idr] draft-i=
etf-idr-eag-distribution-05.txt</span><o:p></o:p></p></div><div><div><div><p=
 class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;m=
argin-left:1.0in'>&nbsp;<o:p></o:p></p></div><div><div><p class=3DMsoNormal st=
yle=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:1.0in'><=
span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>/* While the dr=
aft is in IDR I am adding MPLS WG here as the discussion is really about MPL=
S-TE and not BGP */</span><o:p></o:p></p></div><div><p class=3DMsoNormal style=
=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:1.0in'><spa=
n style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>&nbsp;</span><o:p>=
</o:p></p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-m=
argin-bottom-alt:auto;margin-left:1.0in'><span style=3D'font-size:12.0pt;font-=
family:"Arial",sans-serif'>Hi,</span><o:p></o:p></p></div><div><p class=3DMsoN=
ormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:=
1.0in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>&nbsp;<=
/span><o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt=
:auto;mso-margin-bottom-alt:auto;margin-left:1.0in'><span style=3D'font-size:1=
2.0pt;font-family:"Arial",sans-serif'>I looked at&nbsp;draft-ietf-idr-eag-di=
stribution-05.txt and would like to share few comments on it.&nbsp;</span><o=
:p></o:p></p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;ms=
o-margin-bottom-alt:auto;margin-left:1.0in'><span style=3D'font-size:12.0pt;fo=
nt-family:"Arial",sans-serif'>&nbsp;</span><o:p></o:p></p></div><div><p clas=
s=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin=
-left:1.0in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>T=
he draft defines extension to BGP-LS in order for the node to signal extende=
d admin groups of a links in the TE domain relaxing the current limit of 32 =
bits.&nbsp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'mso-ma=
rgin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:1.0in'><span style=3D=
'font-size:12.0pt;font-family:"Arial",sans-serif'>&nbsp;</span><o:p></o:p></=
p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bo=
ttom-alt:auto;margin-left:1.0in'><span style=3D'font-size:12.0pt;font-family:"=
Arial",sans-serif'>Observations:</span><o:p></o:p></p></div><div><p class=3DMs=
oNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-lef=
t:1.0in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>&nbsp=
;</span><o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-a=
lt:auto;mso-margin-bottom-alt:auto;margin-left:1.0in'><span style=3D'font-size=
:12.0pt;font-family:"Arial",sans-serif'>1. Is the draft only applicable to M=
PLS-TE or also to SR networks ? If the latter the title needs to be changed.=
&nbsp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'mso-margin-=
top-alt:auto;mso-margin-bottom-alt:auto;margin-left:1.0in'><span style=3D'font=
-size:12.0pt;font-family:"Arial",sans-serif'>&nbsp;</span><o:p></o:p></p></d=
iv><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-=
alt:auto;margin-left:1.0in'><span style=3D'font-size:12.0pt;font-family:"Arial=
",sans-serif'>2. While it is usually considered good to have more then less =
of anything let's look at the bigger picture and the consequences of this pr=
oposal in respect to its current applicability of MPLS-TE:&nbsp;</span><o:p>=
</o:p></p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-m=
argin-bottom-alt:auto;margin-left:1.0in'><span style=3D'font-size:12.0pt;font-=
family:"Arial",sans-serif'>&nbsp;</span><o:p></o:p></p></div><div><p class=3DM=
soNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-le=
ft:1.0in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>Sign=
alling of 32 affinity bits of the link is just a tiny piece of the full pict=
ure. In MPLS-TE networks those bits are signaled in SESSION_ATTRIBUTE of RSV=
P-PATH msg as defined in RFC3209 section 4.7</span><o:p></o:p></p></div><div=
><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:aut=
o;margin-left:1.0in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-=
serif'>&nbsp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'mso-=
margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:1.0in'><span styl=
e=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>Signalling more then 32 =
bits will just not fit the current space hence fundamental set of RSVP-TE (a=
ka MPLS-TE) operation are broken.&nbsp;</span><o:p></o:p></p></div><div><p c=
lass=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mar=
gin-left:1.0in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif=
'>&nbsp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'mso-margi=
n-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:1.0in'><span style=3D'fo=
nt-size:12.0pt;font-family:"Arial",sans-serif'>Likewise most of the CSPF imp=
lementations would also need to modified to accomodate for BGP signalled ext=
ened affinity bits.&nbsp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal=
 style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:1.0in=
'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>&nbsp;</span=
><o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto=
;mso-margin-bottom-alt:auto;margin-left:1.0in'><span style=3D'font-size:12.0pt=
;font-family:"Arial",sans-serif'>IMO if there is real need to have more then=
 32 admin groups per link in a TE domain the right process would be to exten=
d IGP as well as RSVP-TE RFCs for it.&nbsp;</span><o:p></o:p></p></div><div>=
<p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto=
;margin-left:1.0in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-s=
erif'>&nbsp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'mso-m=
argin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:1.0in'><span style=
=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>Moreover as we know RSVP-=
TE or SR-TE while can steer packets via constrained paths do not guarantee a=
ny interface level reservations or packet prioritization. Those are control =
plane driven features.&nbsp;</span><o:p></o:p></p></div><div><p class=3DMsoNor=
mal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:1.=
0in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>&nbsp;</s=
pan><o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:a=
uto;mso-margin-bottom-alt:auto;margin-left:1.0in'><span style=3D'font-size:12.=
0pt;font-family:"Arial",sans-serif'>As such one could also notice that with =
the extened set of link affinity classes there is real need to also extend Q=
oS of each network element to offer more then 32 diffserv classes. Otherwise=
 in the event of congestion it is likely that packets assumed to be classifi=
ed into one admin group will likely compete for bandwith in the same queue w=
ith packets classified into different group.</span><o:p></o:p></p></div><div=
><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:aut=
o;margin-left:1.0in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-=
serif'>&nbsp;</span><o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'mso-=
margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:1.0in'><span styl=
e=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>So while I do not have c=
oncerns to define such TLV in BGP-LS I do have bigger picture observations w=
hich I believe need to be addressed and need to become formal references in =
this document before we proceed on it in IDR any further.</span><o:p></o:p><=
/p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-b=
ottom-alt:auto;margin-left:1.0in'><span style=3D'font-size:12.0pt;font-family:=
"Arial",sans-serif'>&nbsp;</span><o:p></o:p></p></div><div><p class=3DMsoNorma=
l style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:1.0i=
n'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>Cheers,</sp=
an><o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:au=
to;mso-margin-bottom-alt:auto;margin-left:1.0in'><span style=3D'font-size:12.0=
pt;font-family:"Arial",sans-serif'>Robert.</span><o:p></o:p></p></div><div><=
p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;=
margin-left:1.0in'><span style=3D'font-size:12.0pt;font-family:"Arial",sans-se=
rif'>&nbsp;</span><o:p></o:p></p></div></div></div></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:1.0in'=
>_______________________________________________ Idr mailing list <a href=3D"m=
ailto:Idr@ietf.org" target=3D"_blank">Idr@ietf.org</a> <a href=3D"https://www.ie=
tf.org/mailman/listinfo/idr" target=3D"_blank">https://www.ietf.org/mailman/li=
stinfo/idr</a> <o:p></o:p></p></div></div></blockquote></div><p class=3DMsoNor=
mal style=3D'margin-left:.5in'><o:p>&nbsp;</o:p></p></div></div></div></body><=
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