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From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
To: "rtgwg@ietf.org" <rtgwg@ietf.org>, "stephen.nadas@ericsson.com" <stephen.nadas@ericsson.com>
Subject: VRRPv3 checksum definition in RFC 5798
Thread-Topic: VRRPv3 checksum definition in RFC 5798
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Date: Thu, 5 Jan 2017 16:02:08 +0000
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Hi all,
I have concerns regarding the way in which the checksum for VRRPv3 messages=
 is defined in RFC 5798<https://tools.ietf.org/html/rfc5798>.
The corresponding text in Section 5.2.8 goes as following:


   The checksum is the 16-bit one's complement of the one's complement

   sum of the entire VRRP message starting with the version field and a

   "pseudo-header" as defined in Section 8.1 of [RFC2460]<https://tools.iet=
f.org/html/rfc2460#section-8.1>.  The next

   header field in the "pseudo-header" should be set to 112 (decimal)

   for VRRP.  For computing the checksum, the checksum field is set to

   zero.  See RFC1071<https://tools.ietf.org/html/rfc1071> for more detail =
[RFC1071<https://tools.ietf.org/html/rfc1071>].


My concern with this text that its definition of the pseudo-header refers t=
o Section 8.1 of RFC 2460 "IPv6 Specification".
What's more, the referenced Section 8.1 "Upper-Layer Checksums" begins with=
 the following text:

   Any transport or other upper-layer protocol that includes the
   addresses from the IP header in its checksum computation must be
   modified for use over IPv6, to include the 128-bit IPv6 addresses
   instead of 32-bit IPv4 addresses.

To me this means that the checksum definition in RFC 5798 is unambiguous wh=
en VRRPv3 is used over IPv6, but becomes problematic if VRRPv3 is used over=
 IPv4:

1.       The referenced definition of the pseudo-header is IPv6-specific

2.       VRRPv2 as defined in RFC 3768<https://www.ietf.org/rfc/rfc3768.txt=
> does not include pseudo-header in its checksum definition, so the modific=
ation mentioned in the quoted fragment from Section 8.1 of RFC 2460 does no=
t seem to directly apply.

I am aware of at least one widely deployed implementation of VRRPv3 for IPv=
4 that does not include the pseudo-header in its checksum computation. At t=
he same time I am also aware of other implementations that include pseudo-h=
eader in the VRRPv3 checksum when it runs over IPv4. Needless to say, such =
implementations are not interoperable. This looks to me as an indication of=
 validity of my concerns.

I wonder if this issue deserves an erratum. Your feedback would be highly a=
ppreciated.

Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com


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<p class=3D"MsoNormal">Hi all,<o:p></o:p></p>
<p class=3D"MsoNormal">I have concerns regarding the way in which the check=
sum for VRRPv3 messages is defined in
<a href=3D"https://tools.ietf.org/html/rfc5798">RFC 5798</a>.<o:p></o:p></p=
>
<p class=3D"MsoNormal">The corresponding text in Section 5.2.8 goes as foll=
owing:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<pre style=3D"page-break-before:always"><span style=3D"font-size:10.0pt;col=
or:black">&nbsp;&nbsp; The checksum is the 16-bit one's complement of the o=
ne's complement<o:p></o:p></span></pre>
<pre style=3D"page-break-before:always"><span style=3D"font-size:10.0pt;col=
or:black">&nbsp;&nbsp; sum of the entire VRRP message starting with the ver=
sion field and a<o:p></o:p></span></pre>
<pre style=3D"page-break-before:always"><span style=3D"font-size:10.0pt;col=
or:black">&nbsp;&nbsp; &quot;pseudo-header&quot; as defined in <a href=3D"h=
ttps://tools.ietf.org/html/rfc2460#section-8.1"><span style=3D"color:black;=
text-decoration:none">Section&nbsp;8.1 of [RFC2460]</span></a>.&nbsp; The n=
ext<o:p></o:p></span></pre>
<pre style=3D"page-break-before:always"><span style=3D"font-size:10.0pt;col=
or:black">&nbsp;&nbsp; header field in the &quot;pseudo-header&quot; should=
 be set to 112 (decimal)<o:p></o:p></span></pre>
<pre style=3D"page-break-before:always"><span style=3D"font-size:10.0pt;col=
or:black">&nbsp;&nbsp; for VRRP.&nbsp; For computing the checksum, the chec=
ksum field is set to<o:p></o:p></span></pre>
<pre style=3D"page-break-before:always"><span style=3D"font-size:10.0pt;col=
or:black">&nbsp;&nbsp; zero.&nbsp; See <a href=3D"https://tools.ietf.org/ht=
ml/rfc1071"><span style=3D"color:black;text-decoration:none">RFC1071</span>=
</a> for more detail [<a href=3D"https://tools.ietf.org/html/rfc1071" title=
=3D"&quot;Computing the Internet checksum&quot;"><span style=3D"color:black=
;text-decoration:none">RFC1071</span></a>].<o:p></o:p></span></pre>
<pre style=3D"page-break-before:always"><span lang=3D"EN"><o:p>&nbsp;</o:p>=
</span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN">My concern with this text that its=
 definition of the pseudo-header refers to Section 8.1 of RFC 2460 &#8220;<=
b>IPv6 Specification</b>&#8221;.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN">What&#8217;s more, the referenced =
Section 8.1 &#8220;Upper-Layer Checksums&#8221; begins with the following t=
ext:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp; Any transport or other upper-laye=
r protocol that includes the<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp; addresses from the IP header in i=
ts checksum computation must be<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp; modified for use over IPv6, to in=
clude the 128-bit IPv6 addresses<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp; instead of 32-bit IPv4 addresses.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN">To me this means that the checksum=
 definition in RFC 5798 is unambiguous when VRRPv3 is used over IPv6, but b=
ecomes problematic if VRRPv3 is used over IPv4:<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo1"><![if !supportLists]><span lang=3D"EN"><span style=3D"mso-list:Ign=
ore">1.<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span dir=3D"LTR"></span><span lang=3D"EN">T=
he referenced definition of the pseudo-header is IPv6-specific<o:p></o:p></=
span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo1"><![if !supportLists]><span lang=3D"EN"><span style=3D"mso-list:Ign=
ore">2.<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span dir=3D"LTR"></span><span lang=3D"EN">V=
RRPv2 as defined in
<a href=3D"https://www.ietf.org/rfc/rfc3768.txt">RFC 3768</a> does not incl=
ude pseudo-header in its checksum definition, so the modification mentioned=
 in the quoted fragment from Section 8.1 of RFC 2460 does not seem to direc=
tly apply.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN">I am aware of at least one widely =
deployed implementation of VRRPv3 for IPv4 that does not include the pseudo=
-header in its checksum computation. At the same time I am also aware of ot=
her implementations that include pseudo-header
 in the VRRPv3 checksum when it runs over IPv4. Needless to say, such imple=
mentations are not interoperable. This looks to me as an indication of vali=
dity of my concerns.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN">I wonder if this issue deserves an=
 erratum. Your feedback would be highly appreciated.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Regards,<o:p></o:p></p>
<p class=3D"MsoNormal">Sasha<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Office: &#43;972-39266302<o:p></o:p></p>
<p class=3D"MsoNormal">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;972-5492663=
02<o:p></o:p></p>
<p class=3D"MsoNormal">Email:&nbsp;&nbsp; Alexander.Vainshtein@ecitele.com<=
o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
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From nobody Mon Jan  9 07:01:04 2017
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Subject: I-D Action: draft-ietf-rtgwg-backoff-algo-04.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Routing Area Working Group of the IETF.

        Title           : SPF Back-off algorithm for link state IGPs
        Authors         : Bruno Decraene
                          Stephane Litkowski
                          Hannes Gredler
                          Acee Lindem
                          Pierre Francois
                          Chris Bowers
	Filename        : draft-ietf-rtgwg-backoff-algo-04.txt
	Pages           : 11
	Date            : 2017-01-09

Abstract:
   This document defines a standard algorithm to back-off link-state IGP
   SPF computations.

   Having one standard algorithm improves interoperability by reducing
   the probability and/or duration of transient forwarding loops during
   the IGP convergence when the IGP reacts to multiple proximate IGP
   events.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-rtgwg-backoff-algo/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-rtgwg-backoff-algo-04

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-rtgwg-backoff-algo-04


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

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


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Subject: RE: I-D Action: draft-ietf-rtgwg-backoff-algo-04.txt
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Hi all,

Just a refresh, with some typo corrections.

-- Bruno

 > -----Original Message-----
 > From: I-D-Announce [mailto:i-d-announce-bounces@ietf.org] On Behalf Of i=
nternet-
 > drafts@ietf.org
 > Sent: Monday, January 09, 2017 4:01 PM
 > To: i-d-announce@ietf.org
 > Cc: rtgwg@ietf.org
 > Subject: I-D Action: draft-ietf-rtgwg-backoff-algo-04.txt
 >=20
 >=20
 > A New Internet-Draft is available from the on-line Internet-Drafts direc=
tories.
 > This draft is a work item of the Routing Area Working Group of the IETF.
 >=20
 >         Title           : SPF Back-off algorithm for link state IGPs
 >         Authors         : Bruno Decraene
 >                           Stephane Litkowski
 >                           Hannes Gredler
 >                           Acee Lindem
 >                           Pierre Francois
 >                           Chris Bowers
 > 	Filename        : draft-ietf-rtgwg-backoff-algo-04.txt
 > 	Pages           : 11
 > 	Date            : 2017-01-09
 >=20
 > Abstract:
 >    This document defines a standard algorithm to back-off link-state IGP
 >    SPF computations.
 >=20
 >    Having one standard algorithm improves interoperability by reducing
 >    the probability and/or duration of transient forwarding loops during
 >    the IGP convergence when the IGP reacts to multiple proximate IGP
 >    events.
 >=20
 >=20
 >=20
 > The IETF datatracker status page for this draft is:
 > https://datatracker.ietf.org/doc/draft-ietf-rtgwg-backoff-algo/
 >=20
 > There's also a htmlized version available at:
 > https://tools.ietf.org/html/draft-ietf-rtgwg-backoff-algo-04
 >=20
 > A diff from the previous version is available at:
 > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-rtgwg-backoff-algo-04
 >=20
 >=20
 > Please note that it may take a couple of minutes from the time of submis=
sion
 > until the htmlized version and diff are available at tools.ietf.org.
 >=20
 > Internet-Drafts are also available by anonymous FTP at:
 > ftp://ftp.ietf.org/internet-drafts/
 >=20
 > _______________________________________________
 > I-D-Announce mailing list
 > I-D-Announce@ietf.org
 > https://www.ietf.org/mailman/listinfo/i-d-announce
 > Internet-Draft directories: http://www.ietf.org/shadow.html
 > or ftp://ftp.ietf.org/ietf/1shadow-sites.txt

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Date: Tue, 10 Jan 2017 13:19:10 -0800
Subject: Re: Routing in DC RTGWG interim - updated
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: RTGWG <rtgwg@ietf.org>
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Hi,

=20

Please find updated agenda for 25th=E2=80=99s interim

=20

Presenters:

Problem statements:

Petr Lapukhov - FB

Dmitry Afanasiev - YANDEX

Russ White/ Shawn Zandi - LinkedIn

=20

Solutions proposed:

Keyur Patel, Arrcus  - Shortest Path Routing Extensions for BGP Protocol, d=
raft-keyupate-idr-bgp-spf

Naiming Shen , Cisco  - IS-IS Routing for Spine-Leaf Topology, draft-shen-i=
sis-spine-leaf-ext

Tony Przygienda, Juniper - RIFT: Routing in Fat Trees, draft-przygienda-rif=
t  (draft to be published later this week)

Bhumip Khasnabish, ZTE - Generic Fault-avoidance Routing Protocol for Data =
Center Networks, draft-sl-rtgwg-far-dcn

=20

=20

Thanks!

=20

Cheers,

Jeff & Chris

=20

=20

From: Jeff Tantsura <jefftant.ietf@gmail.com>
Date: Saturday, December 17, 2016 at 06:10
To: RTGWG <rtgwg@ietf.org>
Cc: 'rtgwg-chairs' <rtgwg-chairs@tools.ietf.org>, Idr <idr-bounces@ietf.org=
>, Isis-wg <isis-wg-bounces@ietf.org>, "ospf@ietf.org" <ospf@ietf.org>
Subject: Routing in DC RTGWG interim

=20

Hi Routing Protocols wg=E2=80=99s,

=20

There have been number of recently published drafts and discussions on the =
topic

As discussed in Seoul, we=E2=80=99d like to have a RTGWG interim to provide the p=
latform for both, draft authors and implementers to talk about what and why.

=20

The date we have set is January 25, 9:00AM PST.

We will be reaching out to you.

=20

Based on our preliminary discussion in Seoul we are planning to have the fo=
llowing presenters:

=20

drafts:

draft-keyupate-idr-bgp-spf =E2=80=93 Keyur to present

draft-shen-isis-spine-leaf-ext =E2=80=93 Naiming?

draft-sl-rtgwg-far-dcn -?

Tony P?

=20

DC network designers:

LinkedIn =E2=80=93 Shawn Z./Russ

Yandex - Dmitry Afanasiev

=20

More to be announced

=20

Thanks,

Jeff & Chris

=20


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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:11.0p=
t'>Hi,<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt=
'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0=
pt'>Please find updated agenda for 25<sup>th</sup>&#8217;s interim<o:p></o:p=
></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'><o:p>&nbsp;</o=
:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>Presenters:<=
o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>Probl=
em statements:<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-siz=
e:11.0pt'>Petr Lapukhov - FB<o:p></o:p></span></p><p class=3DMsoNormal><span s=
tyle=3D'font-size:11.0pt'>Dmitry Afanasiev - YANDEX<o:p></o:p></span></p><p cl=
ass=3DMsoNormal><span style=3D'font-size:11.0pt'>Russ White/ Shawn Zandi - Linke=
dIn<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>&=
nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'=
>Solutions proposed:<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'fo=
nt-size:11.0pt'>Keyur Patel, Arrcus &nbsp;- Shortest Path Routing Extensions=
 for BGP Protocol, draft-keyupate-idr-bgp-spf<o:p></o:p></span></p><p class=3D=
MsoNormal><span style=3D'font-size:11.0pt'>Naiming Shen , Cisco &nbsp;- IS-IS =
Routing for Spine-Leaf Topology, draft-shen-isis-spine-leaf-ext<o:p></o:p></=
span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>Tony Przygienda, =
Juniper - RIFT: Routing in Fat Trees, draft-przygienda-rift &nbsp;(draft to =
be published later this week)<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt'>Bhumip Khasnabish, ZTE - Generic Fault-avoidance Ro=
uting Protocol for Data Center Networks, draft-sl-rtgwg-far-dcn<o:p></o:p></=
span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>&nbsp;<o:p></o:p>=
</span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'><o:p>&nbsp;</o:=
p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>Thanks!<o:p><=
/o:p></span></p><div><p class=3DMsoNormal><span style=3D'font-size:10.5pt;color:=
black'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'font-size=
:10.5pt;color:black'>Cheers,<o:p></o:p></span></p><p class=3DMsoNormal><span s=
tyle=3D'font-size:10.5pt;color:black'>Jeff &amp; Chris<o:p></o:p></span></p></=
div><p class=3DMsoNormal><span style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></spa=
n></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></s=
pan></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'>Jeff Tantsura &lt;jefftant.ietf@gmail.com&gt;<b=
r><b>Date: </b>Saturday, December 17, 2016 at 06:10<br><b>To: </b>RTGWG &lt;=
rtgwg@ietf.org&gt;<br><b>Cc: </b>'rtgwg-chairs' &lt;rtgwg-chairs@tools.ietf.=
org&gt;, Idr &lt;idr-bounces@ietf.org&gt;, Isis-wg &lt;isis-wg-bounces@ietf.=
org&gt;, &quot;ospf@ietf.org&quot; &lt;ospf@ietf.org&gt;<br><b>Subject: </b>=
Routing in DC RTGWG interim<o:p></o:p></span></p></div><div><p class=3DMsoNorm=
al><span style=3D'font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p><=
/div><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>Hi Routing Protocols =
wg&#8217;s,</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:1=
1.0pt'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size=
:11.0pt'>There have been number of recently published drafts and discussions=
 on the topic</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size=
:11.0pt'>As discussed in Seoul, we&#8217;d like to have a RTGWG interim to p=
rovide the platform for both, draft authors and implementers to talk about w=
hat and why.</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-siz=
e:11.0pt'>The date we have set is January 25, 9:00AM PST.</span><o:p></o:p><=
/p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>We will be reaching out=
 to you.</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11.0=
pt'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11=
.0pt'>Based on our preliminary discussion in Seoul we are planning to have t=
he following presenters:</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 sty=
le=3D'font-size:11.0pt'>drafts:</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt'>draft-keyupate-idr-bgp-spf &#8211; Keyur to present=
</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>draf=
t-shen-isis-spine-leaf-ext &#8211; Naiming?</span><o:p></o:p></p><p class=3DMs=
oNormal><span style=3D'font-size:11.0pt'>draft-sl-rtgwg-far-dcn -?</span><o:p>=
</o:p></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>Tony P?</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'>DC network =
designers:</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11=
.0pt'>LinkedIn &#8211; Shawn Z./Russ</span><o:p></o:p></p><p class=3DMsoNormal=
><span style=3D'font-size:11.0pt'>Yandex - Dmitry Afanasiev</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'>More to be announced<=
/span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;color:=
black'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size=
:11.0pt;color:black'>Thanks,</span><o:p></o:p></p><p class=3DMsoNormal><span s=
tyle=3D'font-size:11.0pt;color:black'>Jeff &amp; Chris</span><o:p></o:p></p><p=
 class=3DMsoNormal>&nbsp;<o:p></o:p></p></div></body></html>

--B_3566899152_897103432--



From nobody Wed Jan 11 15:23:08 2017
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From: prz <prz@zeta2.ch>
To: Jeff Tantsura <jefftant.ietf@gmail.com>
Subject: Re: [OSPF] Routing in DC RTGWG interim - updated
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On Tue, 10 Jan 2017 13:19:10 -0800, Jeff Tantsura  wrote:  

...


Presenters: 

... 

Tony Przygienda, Juniper - RIFT: Routing in Fat
Trees, draft-przygienda-rift (draft to be published later this week)


https://datatracker.ietf.org/doc/draft-przygienda-rift/ 

--- tony  


 
--=_aebd4637e7a3656194bcfb733d2ec781
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<p>On Tue, 10 Jan 2017 13:19:10 -0800, Jeff Tantsura &lt;jefftant.ietf@gmai=
l.com&gt; wrote:</p>
<blockquote type=3D"cite" style=3D"padding-left:5px; border-left:#1010ff 2p=
x solid; margin-left:5px; width:100%">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size: 14.666666984558105px;">.=
=2E.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11.0pt;">Presenters:</span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt;">...</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11pt;">Tony Przygienda, Ju=
niper - RIFT: Routing in Fat Trees, draft-przygienda-rift &nbsp;(draft to b=
e published later this week)</span></p>
<p class=3D"MsoNormal">&nbsp;</p>
</div>
</blockquote>
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size: 12pt;">https://datatracker=
=2Eietf.org/doc/draft-przygienda-rift/</span></p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"font-size: 12pt;">--- tony &nbsp;</sp=
an></p>
</div>
<p>&nbsp;</p>
--=_aebd4637e7a3656194bcfb733d2ec781--


From nobody Fri Jan 13 05:53:59 2017
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Subject: Re: YANG Doctors review for draft-ietf-rtgwg-yang-vrrp
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Including the rtgwg list.

Regards, B.
> Hi,
>
> I was asked to review the draft-ietf-rtgwg-yang-vrrp document, here 
> are my comments:
>
> - overall, the module is in a good shape, the common compilers are 
> able to parse it and do not complain about anything
>
> - the I-D text is very brief - some more detailed text about the 
> scope, relationship to other (augmented) modules and use cases for the 
> module would be welcome. Similarly, I would appreciate more detailed 
> description of the specific sections of the module. The use cases can 
> be demonstrated on configuration data examples which are now 
> completely missing.
>
> - it seems to me that at least some of the leafs in notifications are 
> supposed to be mandatory, maybe not only in notifications, but I'm not 
> expert in this area.
>   - e.g. the interface leaf in vrrp-virtual-router-error-event 
> notification, the leaf is then also used in path expression for 
> vrid-v4 (vrid-v6) leafref
>
> - module imports ietf-interfaces and ietf-ip, thus it MUST contain 
> normative references to RFC 7223 and RFC RFC 7277 - in I-D's reference 
> section as well as in the module (as other imported modules are 
> already referenced)
>
> - unify the new-master-reason-type enums' names: (master-)preempted vs 
> master-no-response
>
> - the local module prefix SHOULD be used instead of no prefix in all 
> path expressions (e.g. vrid-v4, vrid-v6)
>
> - consider changing type of the version leaf in vrrp-common-attributes 
> grouping to identityref - that way it would be possible only to 
> augment the current module for any future version of the protocol, 
> enumeration is limiting
>
> - vrrp-v3-attributes grouping seems as an addition to the 
> vrrp-common-attributes (at least it is always used together with 
> vrrp-common-attributes). Do you see (e.g. in some other module) a use 
> case to instantiate vrrp-common-attributes without vrrp-v3-attributes? 
> If not, the vrrp-v3-attributes should be placed into 
> vrrp-v3-attributes grouping. It is also question if it needs in that 
> case a separate grouping, the accept-mode leaf could be placed 
> directly into the common grouping just with the when condition.
>
> - having a key of the "network" list named "network" (in 
> vrrp-ipv4-attributes/track) seems as a bad design, try to rename the 
> list or its key, also the descriptions of the network list and its 
> container networks are not very clear.
>
> - the names in the comments behind the closing brackets inside the 
> vrrp-ipv4-attributes/track container are wrong (e.g. track-interfaces 
> instead of interfaces or track-networks instead of networks)
>
> - the previous 2 notes also apply to vrrp-ipv6-attributes grouping
>
> - vrrp-state-attributes/up-time - uptime is usually interpreted as a 
> time duration, but here it is used as a moment in time, so if it is 
> not defined this way in VRRP protocol, consider renaming
>
> - vrrp-state-attributes/last-event - are the events really so generic 
> that the type here must be a string? Maybe having identities for them 
> could help readability and understandability.
>
>
> Radek
>
> .
>


From nobody Fri Jan 13 08:39:50 2017
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From: Julien Meuric <julien.meuric@orange.com>
Organization: Orange
Subject: Routing Directorate QA Review of draft-ietf-rtgwg-yang-rip
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Hello,

I have been selected as the Routing Directorate QA reviewer for this
draft. For more information about the Routing Directorate, please see
http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

At this stage, the intend of the following is not to discuss the WG's
decision about the I-D, but rather to help improving its content.

Please not that I am not deep Yang expert, but RFC 6087 has provided me
with valuable guidelines.

_Summary_
The Yang module specified in the I-D may be almost complete to move
forward. The carrying document however deserves an update before going
to the next step. I do not repeat every comment raised by Yang doctors
in last December, but those need to be addressed as well.

_Comments_
- Add "import ietf-isis" and "import ietf-bgp" (page 9)
- According to RFC 6087, section 3.1, "the module description statement
MUST contain a reference to the latest approved IETF Trust Copyright
statement" (p 10).
- Both "prefix-set-ref" and "route-policy-ref" are defined as new types
(p 11): is there a reason not to consider them as generic types
specified elsewhere (e.g., among routing types).
- Yangvalidator raises errors on the 6 "must" expressions (cf. Yang
doctors' review).
- The security section does not say anything about the read/write fields
nor the "clear route" RPC: it really requires some work, please see the
template in RFC 6087, section 6.1.
- Normative references needs to be updated, at least with the following:
  * RFC 6991
  * RFC 7223
  * RFC 7277
  * draft-ietf-rtgwg-routing-types
  * draft-ietf-rtgwg-yang-key-chain
  * draft-ietf-ospf-yang
  * draft-ietf-isis-yang-isis-cfg
  * draft-ietf-idr-bgp-model
  * draft-ietf-bfd-yang
- Reading RFC 1724 (RIPv2 MIB) is clearly unnecessary to understand the
document, the reference must thus be moved to the informative list.

_Nits_
- In the "bfd-protocol-parms" string (page 10), the abbreviation for
"parameters" is unusual; was "params" intended?
- In "originate-default-route-container" (p 12), to be consistent: s/RIP
or RIPng instance/RIP routing instance/
- In "redistribute-container" (p 12): s/BFP autonomous system/BGP
autonomous system/
- In "list isis" (p 12-13): s/ISIS/IS-IS/  [5 times]
- In "list ospfv2" (p 14-15): s/OSPF routing instance into the RIP
routing instance/OSPFv2 routing instance into the RIPv2 routing
instance/  [twice]
- In "route-type" of "list ospfv2" (p 15): s/OSPF routes matching the
specified route type into the RIP routing instance/OSPFv2 routes
matching the specified route type into the RIPv2 routing instance/
- In "list ospfv3" (p 15): s/OSPF routing instance into the RIP routing
instance/OSPFv3 routing instance into the RIPng routing instance/  [twice]
- In "route-type" of "list ospfv3" (p 16): s/OSPF routes matching the
specified route type into the RIP routing instance/OSPFv3 routes
matching the specified route type into the RIPng routing instance/
- In "ripv2" (p 16): s/RIP routing instance into the current RIP routing
instance/RIPv2 routing instance into the current RIPv2 routing
instance/  [twice]
- In "leaf listen" of "list interface" (p 29): s/RIP or RIPng/RIPv2 or
RIPng/
- In "container ipv4" (p 31): s/A RIPv2 RIP neighbor/A RIPv2 neighbor/
- In "container ipv6" (p 33): s/A RIPv2 RIP neighbor/A RIPng neighbor/
- In "leaf ipv6-prefix" of "container routes" (p 34): s/in
RFC5952)and/in RFC5952) and/


Regards,

Julien


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Subject: Routing in DC RTGWG interim - updated
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--_002_CE03DB3D7B45C245BCA0D243277949362F7D1E11MX307CL04corpem_--


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "Black, David" <David.Black@dell.com>, Jeff Tantsura <jefftant.ietf@gmail.com>, RTGWG <rtgwg@ietf.org>, Isis-wg <isis-wg-bounces@ietf.org>, "'rtgwg-chairs'" <rtgwg-chairs@tools.ietf.org>, Idr <idr-bounces@ietf.org>, "ospf@ietf.org" <ospf@ietf.org>
Subject: Re: [OSPF] Routing in DC RTGWG interim - updated
Thread-Topic: [OSPF] Routing in DC RTGWG interim - updated
Thread-Index: AQHScA4hxOUlt1nNKUObjJKHJXgifA==
Date: Mon, 16 Jan 2017 15:35:14 +0000
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Hi David,=20
The meeting is 12:00 PM - 2:30 PM EST.
Thanks,
Acee

On 1/16/17, 6:42 AM, "OSPF on behalf of Black, David"
<ospf-bounces@ietf.org on behalf of David.Black@dell.com> wrote:

>When: Jan 25, 2017 (all day)
>--
>_____________________________________________
>From: rtgwg [mailto:rtgwg-bounces@ietf.org] On Behalf Of Jeff Tantsura
>Sent: Tuesday, January 10, 2017 4:19 PM
>To: RTGWG
>Cc: Isis-wg; 'rtgwg-chairs'; Idr; ospf@ietf.org
>Subject: Re: Routing in DC RTGWG interim - updated
>
>
>Hi,
>
>Please find updated agenda for 25th=B9s interim
>
>Presenters:
>Problem statements:
>Petr Lapukhov - FB
>Dmitry Afanasiev - YANDEX
>Russ White/ Shawn Zandi - LinkedIn
>
>Solutions proposed:
>Keyur Patel, Arrcus  - Shortest Path Routing Extensions for BGP Protocol,
>draft-keyupate-idr-bgp-spf
>Naiming Shen , Cisco  - IS-IS Routing for Spine-Leaf Topology,
>draft-shen-isis-spine-leaf-ext
>Tony Przygienda, Juniper - RIFT: Routing in Fat Trees,
>draft-przygienda-rift  (draft to be published later this week)
>Bhumip Khasnabish, ZTE - Generic Fault-avoidance Routing Protocol for
>Data Center Networks, draft-sl-rtgwg-far-dcn
>
>
>Thanks!
>
>Cheers,
>Jeff & Chris
>
>
>From: Jeff Tantsura
><jefftant.ietf@gmail.com<mailto:jefftant.ietf@gmail.com>>
>Date: Saturday, December 17, 2016 at 06:10
>To: RTGWG <rtgwg@ietf.org<mailto:rtgwg@ietf.org>>
>Cc: 'rtgwg-chairs'
><rtgwg-chairs@tools.ietf.org<mailto:rtgwg-chairs@tools.ietf.org>>, Idr
><idr-bounces@ietf.org<mailto:idr-bounces@ietf.org>>, Isis-wg
><isis-wg-bounces@ietf.org<mailto:isis-wg-bounces@ietf.org>>,
>"ospf@ietf.org<mailto:ospf@ietf.org>"
><ospf@ietf.org<mailto:ospf@ietf.org>>
>Subject: Routing in DC RTGWG interim
>
>Hi Routing Protocols wg=B9s,
>
>There have been number of recently published drafts and discussions on
>the topic
>As discussed in Seoul, we=B9d like to have a RTGWG interim to provide the
>platform for both, draft authors and implementers to talk about what and
>why.
>
>The date we have set is January 25, 9:00AM PST.
>We will be reaching out to you.
>
>Based on our preliminary discussion in Seoul we are planning to have the
>following presenters:
>
>drafts:
>draft-keyupate-idr-bgp-spf =AD Keyur to present
>draft-shen-isis-spine-leaf-ext =AD Naiming?
>draft-sl-rtgwg-far-dcn -?
>Tony P?
>
>DC network designers:
>LinkedIn =AD Shawn Z./Russ
>Yandex - Dmitry Afanasiev
>
>More to be announced
>
>Thanks,
>Jeff & Chris
>_______________________________________________
>OSPF mailing list
>OSPF@ietf.org
>https://www.ietf.org/mailman/listinfo/ospf


From nobody Mon Jan 16 08:33:36 2017
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Subject: =?utf-8?q?Mirja_K=C3=BChlewind=27s_No_Objection_on_draft-ietf-rtgw?= =?utf-8?q?g-rlfa-node-protection-10=3A_=28with_COMMENT=29?=
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Mirja Kühlewind has entered the following ballot position for
draft-ietf-rtgwg-rlfa-node-protection-10: No Objection

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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Overall comment: This reads rather like an informational rfc; however
given that rfc7490 is standards track, I guess that's fine.

More specific comments:
- More abbreviations could be spelled out to make it easier to read.
- Not sure what section 3 tells me; but I'm also not an expert. 
- Also section 3: "As already specified in Section 2.3.4 to limit the
computational
   overhead of the proposed approach, forward SPF computations MUST be
   run on a selected subset from the entire set of PQ-nodes computed in
   the network, with a finite limit on the number of PQ-nodes in the
   subset."
   I guess you don't need the upper case MUST here.
- Also then in section 2.3.4: "To limit the computational overhead of the
approach proposed, this
   document proposes that implementations MUST choose a subset from the
   entire set of PQ-nodes computed in the network, with a finite limit
   on the number of PQ-nodes in the subset."
   Saying "this doc recommends" and "MUST" in the same sentence seem
inaccurate.
- And also section 2.3.4: Could you maybe suggest or discuss an
appropriate default value?



From nobody Mon Jan 16 13:01:06 2017
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Subject: I-D Action: draft-ietf-rtgwg-yang-rip-03.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Routing Area Working Group of the IETF.

        Title           : A YANG Data Model for Routing Information Protocol (RIP)
        Authors         : Xufeng Liu
                          Prateek Sarda
                          Vikram Choudhary
	Filename        : draft-ietf-rtgwg-yang-rip-03.txt
	Pages           : 44
	Date            : 2017-01-16

Abstract:
   This document describes a data model for the Routing Information
   Protocol (RIP).  Both RIP version 2 and RIPng are covered.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-rtgwg-yang-rip/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-rtgwg-yang-rip-03

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-rtgwg-yang-rip-03


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until the htmlized version and diff are available at tools.ietf.org.

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ftp://ftp.ietf.org/internet-drafts/


From nobody Tue Jan 17 11:50:51 2017
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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 Routing Area Working Group of the IETF.

        Title           : LFA selection for Multi-Homed Prefixes
        Authors         : Pushpasis Sarkar
                          Shraddha Hegde
                          Chris Bowers
                          Uma Chunduri
                          Jeff Tantsura
                          Bruno Decraene
                          Hannes Gredler
	Filename        : draft-ietf-rtgwg-multihomed-prefix-lfa-01.txt
	Pages           : 16
	Date            : 2017-01-16

Abstract:
   This document shares experience gained from implementing algorithms
   to determine Loop-Free Alternates for multi-homed prefixes.  In
   particular, this document provides explicit inequalities that can be
   used to evaluate neighbors as a potential alternates for multi-homed
   prefixes.  It also provides detailed criteria for evaluating
   potential alternates for external prefixes advertised by OSPF ASBRs.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-rtgwg-multihomed-prefix-lfa/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-rtgwg-multihomed-prefix-lfa-01

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-rtgwg-multihomed-prefix-lfa-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: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
Date: Wed, 18 Jan 2017 08:12:10 +0530
Message-ID: <CAEFuwkit6gUtMuV90vFaFHe4NwK+1bsSCv3EEmhjKYStF7M0Ew@mail.gmail.com>
Subject: =?UTF-8?Q?Re=3A_Mirja_K=C3=BChlewind=27s_No_Objection_on_draft=2Dietf=2Drt?= =?UTF-8?Q?gwg=2Drlfa=2Dnode=2Dprotection=2D10=3A_=28with_COMMENT=29?=
To: Mirja Kuehlewind <ietf@kuehlewind.net>
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Hi Mirja,

Thanks a lot for the comments. And sorry for not being able to reply
earlier. Please find some comments  inline.

Thanks
-Pushpasis

On Mon, Jan 16, 2017 at 10:03 PM, Mirja Kuehlewind <ietf@kuehlewind.net>
wrote:

> Mirja K=C3=BChlewind has entered the following ballot position for
> draft-ietf-rtgwg-rlfa-node-protection-10: No Objection
>
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
>
>
> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/
>
>
>
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> Overall comment: This reads rather like an informational rfc; however
> given that rfc7490 is standards track, I guess that's fine.
>
> More specific comments:
> - More abbreviations could be spelled out to make it easier to read.
>
[Pushpasis] I will try to add as many as I can in the next version :)

> - Not sure what section 3 tells me; but I'm also not an expert.
>
[Pushpasis] Section 3 is about a using the same solution proposed to find a
node-protected R-LFA path by running a forward-SPF on the PQ node(s) to
select parameters of the same paths discovered, so that the computing
router on discovering multiple R-LFA backup paths to a single destination
can run some backup-path-selection policies on the same path parameters
collected (while doing computing F-SPF) to select one or more best suited
R-LFA backup paths for the destination. Hope it explains :) You may also
want to refer to RFC7916 for more explanation.

- Also section 3: "As already specified in Section 2.3.4 to limit the
> computational
>    overhead of the proposed approach, forward SPF computations MUST be
>    run on a selected subset from the entire set of PQ-nodes computed in
>    the network, with a finite limit on the number of PQ-nodes in the
>    subset."
>    I guess you don't need the upper case MUST here.
>
[Pushpasis] Actually this was suggested to be exactly a MUST in WG
discussions on the WG mail

> - Also then in section 2.3.4: "To limit the computational overhead of the
> approach proposed, this
>    document proposes that implementations MUST choose a subset from the
>    entire set of PQ-nodes computed in the network, with a finite limit
>    on the number of PQ-nodes in the subset."
>    Saying "this doc recommends" and "MUST" in the same sentence seem
> inaccurate.
>
[Pushpasis] Should I replace 'recommends' with 'specifies' then?

> - And also section 2.3.4: Could you maybe suggest or discuss an
> appropriate default value?
>
[Pushpasis] I have myself implemented it for Juniper and the default value
as 16. I can specify the same as a suggested default. But I am not sure it
will be raise any concern in the WG or not. If you suggest, I can go ahead
and put this in the next version.

Thanks once again
-Pushpasis

--001a114dbe7670d4b70546555d9a
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<div dir=3D"ltr">Hi Mirja,<div><br></div><div>Thanks a lot for the comments=
. And sorry for not being able to reply earlier. Please find some comments =
=C2=A0inline.</div><div><br></div><div>Thanks</div><div>-Pushpasis</div><di=
v class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Jan 16, 2017=
 at 10:03 PM, Mirja Kuehlewind <span dir=3D"ltr">&lt;<a href=3D"mailto:ietf=
@kuehlewind.net" target=3D"_blank">ietf@kuehlewind.net</a>&gt;</span> wrote=
:<br><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bo=
rder-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:so=
lid;padding-left:1ex">Mirja K=C3=BChlewind has entered the following ballot=
 position for<br>
draft-ietf-rtgwg-rlfa-node-<wbr>protection-10: No Objection<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
email addresses included in the To and CC lines. (Feel free to cut this<br>
introductory paragraph, however.)<br>
<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/iesg/<=
wbr>statement/discuss-criteria.<wbr>html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-prot=
ection/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/=
<wbr>doc/draft-ietf-rtgwg-rlfa-<wbr>node-protection/</a><br>
<br>
<br>
<br>
------------------------------<wbr>------------------------------<wbr>-----=
-----<br>
COMMENT:<br>
------------------------------<wbr>------------------------------<wbr>-----=
-----<br>
<br>
Overall comment: This reads rather like an informational rfc; however<br>
given that rfc7490 is standards track, I guess that&#39;s fine.<br>
<br>
More specific comments:<br>
- More abbreviations could be spelled out to make it easier to read.<br></b=
lockquote><div>[Pushpasis] I will try to add as many as I can in the next v=
ersion :)=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px =
0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);bord=
er-left-style:solid;padding-left:1ex">
- Not sure what section 3 tells me; but I&#39;m also not an expert.<br></bl=
ockquote><div>[Pushpasis] Section 3 is about a using the same solution prop=
osed to find a node-protected R-LFA path by running a forward-SPF on the PQ=
 node(s) to select parameters of the same paths discovered, so that the com=
puting router on discovering multiple R-LFA backup paths to a single destin=
ation can run some backup-path-selection policies on the same path paramete=
rs collected (while doing computing F-SPF) to select one or more best suite=
d R-LFA backup paths for the destination. Hope it explains :) You may also =
want to refer to RFC7916 for more explanation.</div><div><br></div><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-wid=
th:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-l=
eft:1ex">
- Also section 3: &quot;As already specified in Section 2.3.4 to limit the<=
br>
computational<br>
=C2=A0 =C2=A0overhead of the proposed approach, forward SPF computations MU=
ST be<br>
=C2=A0 =C2=A0run on a selected subset from the entire set of PQ-nodes compu=
ted in<br>
=C2=A0 =C2=A0the network, with a finite limit on the number of PQ-nodes in =
the<br>
=C2=A0 =C2=A0subset.&quot;<br>
=C2=A0 =C2=A0I guess you don&#39;t need the upper case MUST here.<br></bloc=
kquote><div>[Pushpasis] Actually this was suggested to be exactly a MUST in=
 WG discussions on the WG mail=C2=A0</div><blockquote class=3D"gmail_quote"=
 style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:=
rgb(204,204,204);border-left-style:solid;padding-left:1ex">
- Also then in section 2.3.4: &quot;To limit the computational overhead of =
the<br>
approach proposed, this<br>
=C2=A0 =C2=A0document proposes that implementations MUST choose a subset fr=
om the<br>
=C2=A0 =C2=A0entire set of PQ-nodes computed in the network, with a finite =
limit<br>
=C2=A0 =C2=A0on the number of PQ-nodes in the subset.&quot;<br>
=C2=A0 =C2=A0Saying &quot;this doc recommends&quot; and &quot;MUST&quot; in=
 the same sentence seem<br>
inaccurate.<br></blockquote><div>[Pushpasis] Should I replace &#39;recommen=
ds&#39; with &#39;specifies&#39; then?=C2=A0</div><blockquote class=3D"gmai=
l_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-lef=
t-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
- And also section 2.3.4: Could you maybe suggest or discuss an<br>
appropriate default value?<br></blockquote><div>[Pushpasis] I have myself i=
mplemented it for Juniper and the default value as 16. I can specify the sa=
me as a suggested default. But I am not sure it will be raise any concern i=
n the WG or not. If you suggest, I can go ahead and put this in the next ve=
rsion.</div><div><br></div><div>Thanks once again</div><div>-Pushpasis</div=
></div><br></div></div>

--001a114dbe7670d4b70546555d9a--


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From: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
Date: Wed, 18 Jan 2017 08:21:44 +0530
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Hi Mirja,

- Also then in section 2.3.4: "To limit the computational overhead of the
> approach proposed, this
>    document proposes that implementations MUST choose a subset from the
>    entire set of PQ-nodes computed in the network, with a finite limit
>    on the number of PQ-nodes in the subset."
>    Saying "this doc recommends" and "MUST" in the same sentence seem
> inaccurate.
>
[Pushpasis] Should I replace 'recommends' with 'specifies' then?

Actually, I don't see the term 'recommends' anywhere in the current
version. So now I am not sure what was the comment about :( Request you to
clarify this a bit, so that I can take the right resolution..

Thanks and regards,
-Pushpasis

On Wed, Jan 18, 2017 at 8:12 AM, Pushpasis Sarkar <pushpasis.ietf@gmail.com=
>
wrote:

> Hi Mirja,
>
> Thanks a lot for the comments. And sorry for not being able to reply
> earlier. Please find some comments  inline.
>
> Thanks
> -Pushpasis
>
> On Mon, Jan 16, 2017 at 10:03 PM, Mirja Kuehlewind <ietf@kuehlewind.net>
> wrote:
>
>> Mirja K=C3=BChlewind has entered the following ballot position for
>> draft-ietf-rtgwg-rlfa-node-protection-10: No Objection
>>
>> When responding, please keep the subject line intact and reply to all
>> email addresses included in the To and CC lines. (Feel free to cut this
>> introductory paragraph, however.)
>>
>>
>> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.htm=
l
>> for more information about IESG DISCUSS and COMMENT positions.
>>
>>
>> The document, along with other ballot positions, can be found here:
>> https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/
>>
>>
>>
>> ----------------------------------------------------------------------
>> COMMENT:
>> ----------------------------------------------------------------------
>>
>> Overall comment: This reads rather like an informational rfc; however
>> given that rfc7490 is standards track, I guess that's fine.
>>
>> More specific comments:
>> - More abbreviations could be spelled out to make it easier to read.
>>
> [Pushpasis] I will try to add as many as I can in the next version :)
>
>> - Not sure what section 3 tells me; but I'm also not an expert.
>>
> [Pushpasis] Section 3 is about a using the same solution proposed to find
> a node-protected R-LFA path by running a forward-SPF on the PQ node(s) to
> select parameters of the same paths discovered, so that the computing
> router on discovering multiple R-LFA backup paths to a single destination
> can run some backup-path-selection policies on the same path parameters
> collected (while doing computing F-SPF) to select one or more best suited
> R-LFA backup paths for the destination. Hope it explains :) You may also
> want to refer to RFC7916 for more explanation.
>
> - Also section 3: "As already specified in Section 2.3.4 to limit the
>> computational
>>    overhead of the proposed approach, forward SPF computations MUST be
>>    run on a selected subset from the entire set of PQ-nodes computed in
>>    the network, with a finite limit on the number of PQ-nodes in the
>>    subset."
>>    I guess you don't need the upper case MUST here.
>>
> [Pushpasis] Actually this was suggested to be exactly a MUST in WG
> discussions on the WG mail
>
>> - Also then in section 2.3.4: "To limit the computational overhead of th=
e
>> approach proposed, this
>>    document proposes that implementations MUST choose a subset from the
>>    entire set of PQ-nodes computed in the network, with a finite limit
>>    on the number of PQ-nodes in the subset."
>>    Saying "this doc recommends" and "MUST" in the same sentence seem
>> inaccurate.
>>
> [Pushpasis] Should I replace 'recommends' with 'specifies' then?
>
>> - And also section 2.3.4: Could you maybe suggest or discuss an
>> appropriate default value?
>>
> [Pushpasis] I have myself implemented it for Juniper and the default valu=
e
> as 16. I can specify the same as a suggested default. But I am not sure i=
t
> will be raise any concern in the WG or not. If you suggest, I can go ahea=
d
> and put this in the next version.
>
> Thanks once again
> -Pushpasis
>
>

--f403045e62a246fa970546557ff5
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Mirja,<div><br></div><div><span class=3D"gmail-im" styl=
e=3D"font-size:12.800000190734863px"><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(2=
04,204,204);border-left-style:solid;padding-left:1ex">- Also then in sectio=
n 2.3.4: &quot;To limit the computational overhead of the<br>approach propo=
sed, this<br>=C2=A0 =C2=A0document proposes that implementations MUST choos=
e a subset from the<br>=C2=A0 =C2=A0entire set of PQ-nodes computed in the =
network, with a finite limit<br>=C2=A0 =C2=A0on the number of PQ-nodes in t=
he subset.&quot;<br>=C2=A0 =C2=A0Saying &quot;this doc recommends&quot; and=
 &quot;MUST&quot; in the same sentence seem<br>inaccurate.<br></blockquote>=
</span><div style=3D"font-size:12.800000190734863px">[Pushpasis] Should I r=
eplace &#39;recommends&#39; with &#39;specifies&#39; then?=C2=A0</div></div=
><div style=3D"font-size:12.800000190734863px"><br></div><div style=3D"font=
-size:12.800000190734863px">Actually, I don&#39;t see the term &#39;recomme=
nds&#39; anywhere in the current version. So now I am not sure what was the=
 comment about :( Request you to clarify this a bit, so that I can take the=
 right resolution..=C2=A0</div><div style=3D"font-size:12.800000190734863px=
"><br></div><div style=3D"font-size:12.800000190734863px">Thanks and regard=
s,</div><div style=3D"font-size:12.800000190734863px">-Pushpasis</div></div=
><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Wed, Jan 18, =
2017 at 8:12 AM, Pushpasis Sarkar <span dir=3D"ltr">&lt;<a href=3D"mailto:p=
ushpasis.ietf@gmail.com" target=3D"_blank">pushpasis.ietf@gmail.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"ltr">Hi Mirja,=
<div><br></div><div>Thanks a lot for the comments. And sorry for not being =
able to reply earlier. Please find some comments =C2=A0inline.</div><div><b=
r></div><div>Thanks</div><div>-Pushpasis</div><div class=3D"gmail_extra"><b=
r><div class=3D"gmail_quote"><span class=3D"">On Mon, Jan 16, 2017 at 10:03=
 PM, Mirja Kuehlewind <span dir=3D"ltr">&lt;<a href=3D"mailto:ietf@kuehlewi=
nd.net" target=3D"_blank">ietf@kuehlewind.net</a>&gt;</span> wrote:<br><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left=
-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;paddi=
ng-left:1ex">Mirja K=C3=BChlewind has entered the following ballot position=
 for<br>
draft-ietf-rtgwg-rlfa-node-pro<wbr>tection-10: No Objection<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
email addresses included in the To and CC lines. (Feel free to cut this<br>
introductory paragraph, however.)<br>
<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/iesg/s=
tat<wbr>ement/discuss-criteria.html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-prot=
ection/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/=
d<wbr>oc/draft-ietf-rtgwg-rlfa-node-<wbr>protection/</a><br>
<br>
<br>
<br>
------------------------------<wbr>------------------------------<wbr>-----=
-----<br>
COMMENT:<br>
------------------------------<wbr>------------------------------<wbr>-----=
-----<br>
<br>
Overall comment: This reads rather like an informational rfc; however<br>
given that rfc7490 is standards track, I guess that&#39;s fine.<br>
<br>
More specific comments:<br>
- More abbreviations could be spelled out to make it easier to read.<br></b=
lockquote></span><div>[Pushpasis] I will try to add as many as I can in the=
 next version :)=C2=A0</div><span class=3D""><blockquote class=3D"gmail_quo=
te" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-col=
or:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
- Not sure what section 3 tells me; but I&#39;m also not an expert.<br></bl=
ockquote></span><div>[Pushpasis] Section 3 is about a using the same soluti=
on proposed to find a node-protected R-LFA path by running a forward-SPF on=
 the PQ node(s) to select parameters of the same paths discovered, so that =
the computing router on discovering multiple R-LFA backup paths to a single=
 destination can run some backup-path-selection policies on the same path p=
arameters collected (while doing computing F-SPF) to select one or more bes=
t suited R-LFA backup paths for the destination. Hope it explains :) You ma=
y also want to refer to RFC7916 for more explanation.</div><span class=3D""=
><div><br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0=
px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-le=
ft-style:solid;padding-left:1ex">
- Also section 3: &quot;As already specified in Section 2.3.4 to limit the<=
br>
computational<br>
=C2=A0 =C2=A0overhead of the proposed approach, forward SPF computations MU=
ST be<br>
=C2=A0 =C2=A0run on a selected subset from the entire set of PQ-nodes compu=
ted in<br>
=C2=A0 =C2=A0the network, with a finite limit on the number of PQ-nodes in =
the<br>
=C2=A0 =C2=A0subset.&quot;<br>
=C2=A0 =C2=A0I guess you don&#39;t need the upper case MUST here.<br></bloc=
kquote></span><div>[Pushpasis] Actually this was suggested to be exactly a =
MUST in WG discussions on the WG mail=C2=A0</div><span class=3D""><blockquo=
te class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-widt=
h:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-le=
ft:1ex">
- Also then in section 2.3.4: &quot;To limit the computational overhead of =
the<br>
approach proposed, this<br>
=C2=A0 =C2=A0document proposes that implementations MUST choose a subset fr=
om the<br>
=C2=A0 =C2=A0entire set of PQ-nodes computed in the network, with a finite =
limit<br>
=C2=A0 =C2=A0on the number of PQ-nodes in the subset.&quot;<br>
=C2=A0 =C2=A0Saying &quot;this doc recommends&quot; and &quot;MUST&quot; in=
 the same sentence seem<br>
inaccurate.<br></blockquote></span><div>[Pushpasis] Should I replace &#39;r=
ecommends&#39; with &#39;specifies&#39; then?=C2=A0</div><span class=3D""><=
blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l=
eft-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;pa=
dding-left:1ex">
- And also section 2.3.4: Could you maybe suggest or discuss an<br>
appropriate default value?<br></blockquote></span><div>[Pushpasis] I have m=
yself implemented it for Juniper and the default value as 16. I can specify=
 the same as a suggested default. But I am not sure it will be raise any co=
ncern in the WG or not. If you suggest, I can go ahead and put this in the =
next version.</div><div><br></div><div>Thanks once again</div><span class=
=3D"HOEnZb"><font color=3D"#888888"><div>-Pushpasis</div></font></span></di=
v><br></div></div>
</blockquote></div><br></div>

--f403045e62a246fa970546557ff5--


From nobody Wed Jan 18 07:31:00 2017
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Subject: =?UTF-8?Q?Re:_Mirja_K=c3=bchlewind's_No_Objection_on_draft-ietf-rtg?= =?UTF-8?Q?wg-rlfa-node-protection-10:_=28with_COMMENT=29?=
To: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
References: <148458441463.22600.5019628198022110802.idtracker@ietfa.amsl.com> <CAEFuwkit6gUtMuV90vFaFHe4NwK+1bsSCv3EEmhjKYStF7M0Ew@mail.gmail.com> <CAEFuwkgY6n7sUqtFJEo-i=S91i4XkwhdSTZz5NQwG4LyP3+9kQ@mail.gmail.com>
From: =?UTF-8?Q?Mirja_K=c3=bchlewind?= <ietf@kuehlewind.net>
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Sorry, it was 'this document proposes' (not recommends)... yes better to use 
'specifies' instead!

On 18.01.2017 03:51, Pushpasis Sarkar wrote:
> Hi Mirja,
>
>     - Also then in section 2.3.4: "To limit the computational overhead of the
>     approach proposed, this
>        document proposes that implementations MUST choose a subset from the
>        entire set of PQ-nodes computed in the network, with a finite limit
>        on the number of PQ-nodes in the subset."
>        Saying "this doc recommends" and "MUST" in the same sentence seem
>     inaccurate.
>
> [Pushpasis] Should I replace 'recommends' with 'specifies' then?
>
> Actually, I don't see the term 'recommends' anywhere in the current version.
> So now I am not sure what was the comment about :( Request you to clarify
> this a bit, so that I can take the right resolution..
>
> Thanks and regards,
> -Pushpasis
>
> On Wed, Jan 18, 2017 at 8:12 AM, Pushpasis Sarkar <pushpasis.ietf@gmail.com
> <mailto:pushpasis.ietf@gmail.com>> wrote:
>
>     Hi Mirja,
>
>     Thanks a lot for the comments. And sorry for not being able to reply
>     earlier. Please find some comments  inline.
>
>     Thanks
>     -Pushpasis
>
>     On Mon, Jan 16, 2017 at 10:03 PM, Mirja Kuehlewind <ietf@kuehlewind.net
>     <mailto:ietf@kuehlewind.net>> wrote:
>
>         Mirja Kühlewind has entered the following ballot position for
>         draft-ietf-rtgwg-rlfa-node-protection-10: No Objection
>
>         When responding, please keep the subject line intact and reply to all
>         email addresses included in the To and CC lines. (Feel free to cut this
>         introductory paragraph, however.)
>
>
>         Please refer to
>         https://www.ietf.org/iesg/statement/discuss-criteria.html
>         <https://www.ietf.org/iesg/statement/discuss-criteria.html>
>         for more information about IESG DISCUSS and COMMENT positions.
>
>
>         The document, along with other ballot positions, can be found here:
>         https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/
>         <https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/>
>
>
>
>         ----------------------------------------------------------------------
>         COMMENT:
>         ----------------------------------------------------------------------
>
>         Overall comment: This reads rather like an informational rfc; however
>         given that rfc7490 is standards track, I guess that's fine.
>
>         More specific comments:
>         - More abbreviations could be spelled out to make it easier to read.
>
>     [Pushpasis] I will try to add as many as I can in the next version :)
>
>         - Not sure what section 3 tells me; but I'm also not an expert.
>
>     [Pushpasis] Section 3 is about a using the same solution proposed to find
>     a node-protected R-LFA path by running a forward-SPF on the PQ node(s) to
>     select parameters of the same paths discovered, so that the computing
>     router on discovering multiple R-LFA backup paths to a single destination
>     can run some backup-path-selection policies on the same path parameters
>     collected (while doing computing F-SPF) to select one or more best suited
>     R-LFA backup paths for the destination. Hope it explains :) You may also
>     want to refer to RFC7916 for more explanation.
>
>         - Also section 3: "As already specified in Section 2.3.4 to limit the
>         computational
>            overhead of the proposed approach, forward SPF computations MUST be
>            run on a selected subset from the entire set of PQ-nodes computed in
>            the network, with a finite limit on the number of PQ-nodes in the
>            subset."
>            I guess you don't need the upper case MUST here.
>
>     [Pushpasis] Actually this was suggested to be exactly a MUST in WG
>     discussions on the WG mail
>
>         - Also then in section 2.3.4: "To limit the computational overhead of the
>         approach proposed, this
>            document proposes that implementations MUST choose a subset from the
>            entire set of PQ-nodes computed in the network, with a finite limit
>            on the number of PQ-nodes in the subset."
>            Saying "this doc recommends" and "MUST" in the same sentence seem
>         inaccurate.
>
>     [Pushpasis] Should I replace 'recommends' with 'specifies' then?
>
>         - And also section 2.3.4: Could you maybe suggest or discuss an
>         appropriate default value?
>
>     [Pushpasis] I have myself implemented it for Juniper and the default
>     value as 16. I can specify the same as a suggested default. But I am not
>     sure it will be raise any concern in the WG or not. If you suggest, I can
>     go ahead and put this in the next version.
>
>     Thanks once again
>     -Pushpasis
>
>


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Subject: =?UTF-8?Q?Re:_Mirja_K=c3=bchlewind's_No_Objection_on_draft-ietf-rtg?= =?UTF-8?Q?wg-rlfa-node-protection-10:_=28with_COMMENT=29?=
To: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
References: <148458441463.22600.5019628198022110802.idtracker@ietfa.amsl.com> <CAEFuwkit6gUtMuV90vFaFHe4NwK+1bsSCv3EEmhjKYStF7M0Ew@mail.gmail.com>
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Hi Pushpasis,

thank for your replies. Please see below!

Mirja

On 18.01.2017 03:42, Pushpasis Sarkar wrote:
> Hi Mirja,
>
> Thanks a lot for the comments. And sorry for not being able to reply earlier.
> Please find some comments  inline.
>
> Thanks
> -Pushpasis
>
> On Mon, Jan 16, 2017 at 10:03 PM, Mirja Kuehlewind <ietf@kuehlewind.net
> <mailto:ietf@kuehlewind.net>> wrote:
>
>     Mirja Kühlewind has entered the following ballot position for
>     draft-ietf-rtgwg-rlfa-node-protection-10: No Objection
>
>     When responding, please keep the subject line intact and reply to all
>     email addresses included in the To and CC lines. (Feel free to cut this
>     introductory paragraph, however.)
>
>
>     Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
>     <https://www.ietf.org/iesg/statement/discuss-criteria.html>
>     for more information about IESG DISCUSS and COMMENT positions.
>
>
>     The document, along with other ballot positions, can be found here:
>     https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/
>     <https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/>
>
>
>
>     ----------------------------------------------------------------------
>     COMMENT:
>     ----------------------------------------------------------------------
>
>     Overall comment: This reads rather like an informational rfc; however
>     given that rfc7490 is standards track, I guess that's fine.
>
>     More specific comments:
>     - More abbreviations could be spelled out to make it easier to read.
>
> [Pushpasis] I will try to add as many as I can in the next version :)
>
>     - Not sure what section 3 tells me; but I'm also not an expert.
>
> [Pushpasis] Section 3 is about a using the same solution proposed to find a
> node-protected R-LFA path by running a forward-SPF on the PQ node(s) to
> select parameters of the same paths discovered, so that the computing router
> on discovering multiple R-LFA backup paths to a single destination can run
> some backup-path-selection policies on the same path parameters collected
> (while doing computing F-SPF) to select one or more best suited R-LFA backup
> paths for the destination. Hope it explains :) You may also want to refer to
> RFC7916 for more explanation.

Still not clear to me. Anyway I'm not an expert and maybe I'm missing 
something. Or let me ask the questions differently: What does this part add 
to the rest of the doc and why is this a separate section?

>
>     - Also section 3: "As already specified in Section 2.3.4 to limit the
>     computational
>        overhead of the proposed approach, forward SPF computations MUST be
>        run on a selected subset from the entire set of PQ-nodes computed in
>        the network, with a finite limit on the number of PQ-nodes in the
>        subset."
>        I guess you don't need the upper case MUST here.
>
> [Pushpasis] Actually this was suggested to be exactly a MUST in WG
> discussions on the WG mail

My point was, given this is a MUST in section 2.3.4 and this sentence starts 
with "As already specified in Section 2.3.4" it does have to be an upper case 
MUST here again (because it's correctly normatively specified in section 
2.3.4). However not a big issue.

>
>     - Also then in section 2.3.4: "To limit the computational overhead of the
>     approach proposed, this
>        document proposes that implementations MUST choose a subset from the
>        entire set of PQ-nodes computed in the network, with a finite limit
>        on the number of PQ-nodes in the subset."
>        Saying "this doc recommends" and "MUST" in the same sentence seem
>     inaccurate.
>
> [Pushpasis] Should I replace 'recommends' with 'specifies' then?
>
>     - And also section 2.3.4: Could you maybe suggest or discuss an
>     appropriate default value?
>
> [Pushpasis] I have myself implemented it for Juniper and the default value as
> 16. I can specify the same as a suggested default. But I am not sure it will
> be raise any concern in the WG or not. If you suggest, I can go ahead and put
> this in the next version.

If you think this could raise any concerns in the wg, you should go back to 
the wg mailing list and ask for feedback/confirmation.



>
> Thanks once again
> -Pushpasis
>


From nobody Wed Jan 18 13:22:49 2017
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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 Routing Area Working Group of the IETF.

        Title           : Routing Key Chain YANG Data Model
        Authors         : Acee Lindem
                          Yingzhen Qu
                          Derek Yeung
                          Ing-Wher Chen
                          Jeffrey Zhang
                          Yi Yang
	Filename        : draft-ietf-rtgwg-yang-key-chain-12.txt
	Pages           : 24
	Date            : 2017-01-18

Abstract:
   This document describes the key chain YANG data model.  A key chain
   is a list of elements each containing a key, send lifetime, accept
   lifetime, and algorithm (authentication or encryption).  By properly
   overlapping the send and accept lifetimes of multiple key chain
   elements, keys and algorithms may be gracefully updated.  By
   representing them in a YANG data model, key distribution can be
   automated.  Key chains are commonly used for routing protocol
   authentication and other applications.  In some applications, the
   protocols do not use the key chain element key directly, but rather a
   key derivation function is used to derive a short-lived key from the
   key chain element key (e.g., the Master Keys used in the TCP
   Authentication Option.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-rtgwg-yang-key-chain/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-rtgwg-yang-key-chain-12

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-rtgwg-yang-key-chain-12


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/


From nobody Thu Jan 19 00:55:28 2017
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To: draft-ietf-rtgwg-yang-key-chain@ietf.org, "rtgwg@ietf.org" <rtgwg@ietf.org>
From: Benoit Claise <bclaise@cisco.com>
Subject: YANG in draft-ietf-rtgwg-yang-key-chain
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Date: Thu, 19 Jan 2017 09:55:19 +0100
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This is a multi-part message in MIME format.
--------------AA111E592843417A97B6240E
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Dear authors,

Thanks for posting a new version of the draft.
However, there is a problem with the YANG module.
You have two extra greater-than signs after the module name, as you can 
see from the diff.



Therefore, we can't extract the YANG module:

    $ xym.py draft-ietf-rtgwg-yang-key-chain-12.txt

    Extracting 'ietf-key-chain@2017-01-20.yang'
        ERROR: 'draft-ietf-rtgwg-yang-key-chain-12.txt', Line 1344 -
    Missing <CODE ENDS>

    No models created.


And all the YANG module that imports ietf-key-chain@2017-01-20.yang 
obviously fail.
Please update this draft asap.

Finally, this error should have been caught by idnits.
Let me know if it's not the case.

Regards, Benoit

--------------AA111E592843417A97B6240E
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--------------42B3E8B6ACD27BEBF1E054E8
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<html>
  <head>

    <meta http-equiv="content-type" content="text/html; charset=utf-8">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    Dear authors,<br>
    <br>
    Thanks for posting a new version of the draft.<br>
    However, there is a problem with the YANG module.<br>
    You have two extra greater-than signs after the module name, as you
    can see from the diff.<br>
    <br>
    <img src="cid:part1.FD513D9B.570F281E@cisco.com" alt=""><br>
    <br>
    Therefore, we can't extract the YANG module:<br>
    <blockquote>$ xym.py draft-ietf-rtgwg-yang-key-chain-12.txt <br>
      <br>
      Extracting '<a class="moz-txt-link-abbreviated" href="mailto:ietf-key-chain@2017-01-20.yang">ietf-key-chain@2017-01-20.yang</a>'<br>
         ERROR: 'draft-ietf-rtgwg-yang-key-chain-12.txt', Line 1344 -
      Missing &lt;CODE ENDS&gt;<br>
      <br>
      No models created.<br>
    </blockquote>
    <br>
    And all the YANG module that imports <a class="moz-txt-link-abbreviated" href="mailto:ietf-key-chain@2017-01-20.yang">ietf-key-chain@2017-01-20.yang</a>
    obviously fail.<br>
    Please update this draft asap.<br>
    <br>
    Finally, this error should have been caught by idnits. <br>
    Let me know if it's not the case.<br>
    <br>
    Regards, Benoit<br>
  </body>
</html>

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--------------AA111E592843417A97B6240E--


From nobody Thu Jan 19 01:57:32 2017
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From: "Benoit Claise" <bclaise@cisco.com>
To: "The IESG" <iesg@ietf.org>
Subject: Benoit Claise's Discuss on draft-ietf-rtgwg-rlfa-node-protection-10: (with DISCUSS and COMMENT)
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Benoit Claise has entered the following ballot position for
draft-ietf-rtgwg-rlfa-node-protection-10: Discuss

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
introductory paragraph, however.)


Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/



----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

This document mentions manageability in his title. Hence my special
focus.
I'm with Eric Vyncke here. His OPS DIR review is:

Not being an expert in LFA, the review focus was only on operation.
And, due to the density and specialization of the I-D, I would like to
ask the authors whether they read RFC 5706 about 'ops and mgmt
guidelines', i.e., to check whether this I-D considered migration from an
existing LFA to the new one, interoperations with previous LFA and how
correct operations can be verified.
As the core topic is about loop-free alternates, we can assume that fault
management and operations are at the core of this I-D. But, I encourage
the authors to quickly review their document with RFC 5706 in mind.

After reading the document (and with basic knowledge of RLFA), I'm unable
to tell at this point if RFC 7916 is still valid for this new
functionality, if it needs to be updated, or even if
https://tools.ietf.org/html/draft-ietf-rtgwg-rlfa-node-protection-10#section-3
is complete in light of RFC 5706. I'll be watching the discussion with
interest.


----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

-  The resulting Remote-LFA
   alternate nexthops (also referred to as the PQ-nodes) may not
provide
   node-protection for all destinations covered by the same, in case of
   failure of the primary nexthop node.

Covered by the same?

- There are also some nits and typos such as " uitilized" in the
abstract.



From nobody Thu Jan 19 02:45:37 2017
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Subject: I-D Action: draft-ietf-rtgwg-yang-key-chain-13.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 Routing Area Working Group of the IETF.

        Title           : Routing Key Chain YANG Data Model
        Authors         : Acee Lindem
                          Yingzhen Qu
                          Derek Yeung
                          Ing-Wher Chen
                          Jeffrey Zhang
                          Yi Yang
	Filename        : draft-ietf-rtgwg-yang-key-chain-13.txt
	Pages           : 24
	Date            : 2017-01-19

Abstract:
   This document describes the key chain YANG data model.  A key chain
   is a list of elements each containing a key, send lifetime, accept
   lifetime, and algorithm (authentication or encryption).  By properly
   overlapping the send and accept lifetimes of multiple key chain
   elements, keys and algorithms may be gracefully updated.  By
   representing them in a YANG data model, key distribution can be
   automated.  Key chains are commonly used for routing protocol
   authentication and other applications.  In some applications, the
   protocols do not use the key chain element key directly, but rather a
   key derivation function is used to derive a short-lived key from the
   key chain element key (e.g., the Master Keys used in the TCP
   Authentication Option.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-rtgwg-yang-key-chain/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-rtgwg-yang-key-chain-13

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-rtgwg-yang-key-chain-13


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: "Acee Lindem (acee)" <acee@cisco.com>
To: "Benoit Claise (bclaise)" <bclaise@cisco.com>, "draft-ietf-rtgwg-yang-key-chain@ietf.org" <draft-ietf-rtgwg-yang-key-chain@ietf.org>, "rtgwg@ietf.org" <rtgwg@ietf.org>
Subject: Re: YANG in draft-ietf-rtgwg-yang-key-chain
Thread-Topic: YANG in draft-ietf-rtgwg-yang-key-chain
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--_004_D4A6030A94AF1aceeciscocom_
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	boundary="_000_D4A6030A94AF1aceeciscocom_"

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Hi Benoit,
It should be fixed now - sorry the compilation error. I have validated the =
draft using: http://www.yangvalidator.com/

I remember looking at the idnits prior to submission but perhaps I didn't c=
heck the YANG validation link.

Thanks,
Acee

From: "Benoit Claise (bclaise)" <bclaise@cisco.com<mailto:bclaise@cisco.com=
>>
Date: Thursday, January 19, 2017 at 2:55 AM
To: "draft-ietf-rtgwg-yang-key-chain@ietf.org<mailto:draft-ietf-rtgwg-yang-=
key-chain@ietf.org>" <draft-ietf-rtgwg-yang-key-chain@ietf.org<mailto:draft=
-ietf-rtgwg-yang-key-chain@ietf.org>>, Routing WG <rtgwg@ietf.org<mailto:rt=
gwg@ietf.org>>
Subject: YANG in draft-ietf-rtgwg-yang-key-chain
Resent-From: <alias-bounces@ietf.org<mailto:alias-bounces@ietf.org>>
Resent-To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Jeffrey Zha=
ng <zzhang@juniper.net<mailto:zzhang@juniper.net>>, <derek@arrcus.com<mailt=
o:derek@arrcus.com>>, Helen Chen <ichen@kuatrotech.com<mailto:ichen@kuatrot=
ech.com>>, Yingzhen Qu <yingzhen.qu@huawei.com<mailto:yingzhen.qu@huawei.co=
m>>, <yi.yang@sockrate.com<mailto:yi.yang@sockrate.com>>
Resent-Date: Thursday, January 19, 2017 at 2:55 AM

Dear authors,

Thanks for posting a new version of the draft.
However, there is a problem with the YANG module.
You have two extra greater-than signs after the module name, as you can see=
 from the diff.

[cid:part1.FD513D9B.570F281E@cisco.com]

Therefore, we can't extract the YANG module:
$ xym.py draft-ietf-rtgwg-yang-key-chain-12.txt

Extracting 'ietf-key-chain@2017-01-20.yang<mailto:ietf-key-chain@2017-01-20=
.yang>'
   ERROR: 'draft-ietf-rtgwg-yang-key-chain-12.txt', Line 1344 - Missing <CO=
DE ENDS>

No models created.

And all the YANG module that imports ietf-key-chain@2017-01-20.yang<mailto:=
ietf-key-chain@2017-01-20.yang> obviously fail.
Please update this draft asap.

Finally, this error should have been caught by idnits.
Let me know if it's not the case.

Regards, Benoit

--_000_D4A6030A94AF1aceeciscocom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>Hi Benoit,&nbsp;</div>
<div>It should be fixed now &#8211; sorry the compilation error. I have val=
idated the draft using:&nbsp;<a href=3D"http://www.yangvalidator.com">http:=
//www.yangvalidator.com</a>/</div>
<div><br>
</div>
<div>I remember looking at the idnits prior to submission but perhaps I did=
n&#8217;t check the YANG validation link.&nbsp;</div>
<div><br>
</div>
<div>Thanks,&nbsp;</div>
<div>Acee</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>&quot;Benoit Claise (bclaise)=
&quot; &lt;<a href=3D"mailto:bclaise@cisco.com">bclaise@cisco.com</a>&gt;<b=
r>
<span style=3D"font-weight:bold">Date: </span>Thursday, January 19, 2017 at=
 2:55 AM<br>
<span style=3D"font-weight:bold">To: </span>&quot;<a href=3D"mailto:draft-i=
etf-rtgwg-yang-key-chain@ietf.org">draft-ietf-rtgwg-yang-key-chain@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:draft-ietf-rtgwg-yang-key-chain@ietf.org">=
draft-ietf-rtgwg-yang-key-chain@ietf.org</a>&gt;, Routing
 WG &lt;<a href=3D"mailto:rtgwg@ietf.org">rtgwg@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>YANG in draft-ietf-rtgwg-y=
ang-key-chain<br>
<span style=3D"font-weight:bold">Resent-From: </span>&lt;<a href=3D"mailto:=
alias-bounces@ietf.org">alias-bounces@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Resent-To: </span>Acee Lindem &lt;<a href=
=3D"mailto:acee@cisco.com">acee@cisco.com</a>&gt;, Jeffrey Zhang &lt;<a hre=
f=3D"mailto:zzhang@juniper.net">zzhang@juniper.net</a>&gt;, &lt;<a href=3D"=
mailto:derek@arrcus.com">derek@arrcus.com</a>&gt;, Helen Chen
 &lt;<a href=3D"mailto:ichen@kuatrotech.com">ichen@kuatrotech.com</a>&gt;, =
Yingzhen Qu &lt;<a href=3D"mailto:yingzhen.qu@huawei.com">yingzhen.qu@huawe=
i.com</a>&gt;, &lt;<a href=3D"mailto:yi.yang@sockrate.com">yi.yang@sockrate=
.com</a>&gt;<br>
<span style=3D"font-weight:bold">Resent-Date: </span>Thursday, January 19, =
2017 at 2:55 AM<br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div bgcolor=3D"#FFFFFF" text=3D"#000000">Dear authors,<br>
<br>
Thanks for posting a new version of the draft.<br>
However, there is a problem with the YANG module.<br>
You have two extra greater-than signs after the module name, as you can see=
 from the diff.<br>
<br>
<img src=3D"cid:part1.FD513D9B.570F281E@cisco.com" alt=3D""><br>
<br>
Therefore, we can't extract the YANG module:<br>
<blockquote>$ xym.py draft-ietf-rtgwg-yang-key-chain-12.txt <br>
<br>
Extracting '<a class=3D"moz-txt-link-abbreviated" href=3D"mailto:ietf-key-c=
hain@2017-01-20.yang">ietf-key-chain@2017-01-20.yang</a>'<br>
&nbsp;&nbsp; ERROR: 'draft-ietf-rtgwg-yang-key-chain-12.txt', Line 1344 - M=
issing &lt;CODE ENDS&gt;<br>
<br>
No models created.<br>
</blockquote>
<br>
And all the YANG module that imports <a class=3D"moz-txt-link-abbreviated" =
href=3D"mailto:ietf-key-chain@2017-01-20.yang">
ietf-key-chain@2017-01-20.yang</a> obviously fail.<br>
Please update this draft asap.<br>
<br>
Finally, this error should have been caught by idnits. <br>
Let me know if it's not the case.<br>
<br>
Regards, Benoit<br>
</div>
</div>
</blockquote>
</span>
</body>
</html>

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From: "Acee Lindem (acee)" <acee@cisco.com>
Subject: Re: I-D Action: draft-ietf-rtgwg-yang-key-chain-13.txt
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This version uses NETCONF Access Control Model (NACM) rules, as defined in
RFC 6536, to make key-strings inaccessible by default. The key-strings are
now retrievable in the operational state as long as the proper NACM rules
are defined.=20

Thanks,
Acee=20

On 1/19/17, 5:45 AM, "rtgwg on behalf of internet-drafts@ietf.org"
<rtgwg-bounces@ietf.org on behalf of internet-drafts@ietf.org> wrote:

>
>A New Internet-Draft is available from the on-line Internet-Drafts
>directories.
>This draft is a work item of the Routing Area Working Group of the IETF.
>
>        Title           : Routing Key Chain YANG Data Model
>        Authors         : Acee Lindem
>                          Yingzhen Qu
>                          Derek Yeung
>                          Ing-Wher Chen
>                          Jeffrey Zhang
>                          Yi Yang
>	Filename        : draft-ietf-rtgwg-yang-key-chain-13.txt
>	Pages           : 24
>	Date            : 2017-01-19
>
>Abstract:
>   This document describes the key chain YANG data model.  A key chain
>   is a list of elements each containing a key, send lifetime, accept
>   lifetime, and algorithm (authentication or encryption).  By properly
>   overlapping the send and accept lifetimes of multiple key chain
>   elements, keys and algorithms may be gracefully updated.  By
>   representing them in a YANG data model, key distribution can be
>   automated.  Key chains are commonly used for routing protocol
>   authentication and other applications.  In some applications, the
>   protocols do not use the key chain element key directly, but rather a
>   key derivation function is used to derive a short-lived key from the
>   key chain element key (e.g., the Master Keys used in the TCP
>   Authentication Option.
>
>
>The IETF datatracker status page for this draft is:
>https://datatracker.ietf.org/doc/draft-ietf-rtgwg-yang-key-chain/
>
>There's also a htmlized version available at:
>https://tools.ietf.org/html/draft-ietf-rtgwg-yang-key-chain-13
>
>A diff from the previous version is available at:
>https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-rtgwg-yang-key-chain-13
>
>
>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/
>
>_______________________________________________
>rtgwg mailing list
>rtgwg@ietf.org
>https://www.ietf.org/mailman/listinfo/rtgwg


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From: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
Date: Thu, 19 Jan 2017 16:35:11 +0530
Message-ID: <CAEFuwkjYQSaWU9ZAVsJdJ_Ja=modj1mLXuOW9G-BOoTjF9LyQA@mail.gmail.com>
Subject: Re: Benoit Claise's Discuss on draft-ietf-rtgwg-rlfa-node-protection-10: (with DISCUSS and COMMENT)
To: Benoit Claise <bclaise@cisco.com>
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Cc: rtgwg-chairs <rtgwg-chairs@ietf.org>, draft-ietf-rtgwg-rlfa-node-protection@ietf.org, The IESG <iesg@ietf.org>, "Eric Vyncke \(evyncke\)" <evyncke@cisco.com>, RTGWG <rtgwg@ietf.org>
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--f403045e62a2d8198b054670818e
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Hi Benoit,

Many many thanks for your review comments. Please find answers inline...

On Thu, Jan 19, 2017 at 3:27 PM, Benoit Claise <bclaise@cisco.com> wrote:

> Benoit Claise has entered the following ballot position for
> draft-ietf-rtgwg-rlfa-node-protection-10: Discuss
>
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
>
>
> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/
>
>
>
> ----------------------------------------------------------------------
> DISCUSS:
> ----------------------------------------------------------------------
>
> This document mentions manageability in his title. Hence my special
> focus.
> I'm with Eric Vyncke here. His OPS DIR review is:
>
> Not being an expert in LFA, the review focus was only on operation.
> And, due to the density and specialization of the I-D, I would like to
> ask the authors whether they read RFC 5706 about 'ops and mgmt
> guidelines', i.e., to check whether this I-D considered migration from an
> existing LFA to the new one, interoperations with previous LFA and how
> correct operations can be verified.
> As the core topic is about loop-free alternates, we can assume that fault
> management and operations are at the core of this I-D. But, I encourage
> the authors to quickly review their document with RFC 5706 in mind.
>
> After reading the document (and with basic knowledge of RLFA), I'm unable
> to tell at this point if RFC 7916 is still valid for this new
> functionality, if it needs to be updated, or even if
> https://tools.ietf.org/html/draft-ietf-rtgwg-rlfa-node-
> protection-10#section-3
> is complete in light of RFC 5706. I'll be watching the discussion with
> interest.
>
> [Pushpasis]
I have provided an elaborate explanation in reply to OPS DIR review
comments from Eric. Request you to please refer to that.. :) And please let
us know if we are missing anything specific here..


> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> -  The resulting Remote-LFA
>    alternate nexthops (also referred to as the PQ-nodes) may not
> provide
>    node-protection for all destinations covered by the same, in case of
>    failure of the primary nexthop node.
>
> Covered by the same?
>
[Pushpasis] The reference here is to the PQ-node computed using RFC7490
specification which only gaurantees protection against failure of first-hop
link and not against failure of first-hop node(or router)..
I will try to change the text to clarify this..

>
> - There are also some nits and typos such as " uitilized" in the
> abstract.
>
[Pushpasis] I will take care of this in a next version shortly.

Thanks once again and Regards,
-Pushpasis

--f403045e62a2d8198b054670818e
Content-Type: text/html; charset=UTF-8
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<div dir=3D"ltr">Hi Benoit,<div><br></div><div>Many many thanks for your re=
view comments. Please find answers inline...</div><div class=3D"gmail_extra=
"><br><div class=3D"gmail_quote">On Thu, Jan 19, 2017 at 3:27 PM, Benoit Cl=
aise <span dir=3D"ltr">&lt;<a href=3D"mailto:bclaise@cisco.com" target=3D"_=
blank">bclaise@cisco.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmai=
l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left=
:1ex">Benoit Claise has entered the following ballot position for<br>
draft-ietf-rtgwg-rlfa-node-<wbr>protection-10: Discuss<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
email addresses included in the To and CC lines. (Feel free to cut this<br>
introductory paragraph, however.)<br>
<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/iesg/<=
wbr>statement/discuss-criteria.<wbr>html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-prot=
ection/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/=
<wbr>doc/draft-ietf-rtgwg-rlfa-<wbr>node-protection/</a><br>
<br>
<br>
<br>
------------------------------<wbr>------------------------------<wbr>-----=
-----<br>
DISCUSS:<br>
------------------------------<wbr>------------------------------<wbr>-----=
-----<br>
<br>
This document mentions manageability in his title. Hence my special<br>
focus.<br>
I&#39;m with Eric Vyncke here. His OPS DIR review is:<br>
<br>
Not being an expert in LFA, the review focus was only on operation.<br>
And, due to the density and specialization of the I-D, I would like to<br>
ask the authors whether they read RFC 5706 about &#39;ops and mgmt<br>
guidelines&#39;, i.e., to check whether this I-D considered migration from =
an<br>
existing LFA to the new one, interoperations with previous LFA and how<br>
correct operations can be verified.<br>
As the core topic is about loop-free alternates, we can assume that fault<b=
r>
management and operations are at the core of this I-D. But, I encourage<br>
the authors to quickly review their document with RFC 5706 in mind.<br>
<br>
After reading the document (and with basic knowledge of RLFA), I&#39;m unab=
le<br>
to tell at this point if RFC 7916 is still valid for this new<br>
functionality, if it needs to be updated, or even if<br>
<a href=3D"https://tools.ietf.org/html/draft-ietf-rtgwg-rlfa-node-protectio=
n-10#section-3" rel=3D"noreferrer" target=3D"_blank">https://tools.ietf.org=
/html/<wbr>draft-ietf-rtgwg-rlfa-node-<wbr>protection-10#section-3</a><br>
is complete in light of RFC 5706. I&#39;ll be watching the discussion with<=
br>
interest.<br>
<br></blockquote><div>[Pushpasis]</div><div>I have provided an elaborate ex=
planation in reply to OPS DIR review comments from Eric. Request you to ple=
ase refer to that.. :) And please let us know if we are missing anything sp=
ecific here..=C2=A0</div><div><br></div><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
------------------------------<wbr>------------------------------<wbr>-----=
-----<br>
COMMENT:<br>
------------------------------<wbr>------------------------------<wbr>-----=
-----<br>
<br>
-=C2=A0 The resulting Remote-LFA<br>
=C2=A0 =C2=A0alternate nexthops (also referred to as the PQ-nodes) may not<=
br>
provide<br>
=C2=A0 =C2=A0node-protection for all destinations covered by the same, in c=
ase of<br>
=C2=A0 =C2=A0failure of the primary nexthop node.<br>
<br>
Covered by the same?<br></blockquote><div>[Pushpasis] The reference here is=
 to the PQ-node computed using RFC7490 specification which only gaurantees =
protection against failure of first-hop link and not against failure of fir=
st-hop node(or router).. =C2=A0</div><div>I will try to change the text to =
clarify this..</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0=
 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
- There are also some nits and typos such as &quot; uitilized&quot; in the<=
br>
abstract.<br></blockquote><div>[Pushpasis] I will take care of this in a ne=
xt version shortly.</div><div><br></div><div>Thanks once again and Regards,=
</div><div>-Pushpasis</div></div><br></div></div>

--f403045e62a2d8198b054670818e--


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From: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
Date: Thu, 19 Jan 2017 17:08:36 +0530
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Hi Mirja,

Thanks for your comments once again.. Please find some more answers inline

-Pushpasis

On Wed, Jan 18, 2017 at 9:02 PM, Mirja K=C3=BChlewind <ietf@kuehlewind.net>
wrote:

> Hi Pushpasis,
>
> thank for your replies. Please see below!
>
> Mirja
>
> On 18.01.2017 03:42, Pushpasis Sarkar wrote:
>
>> Hi Mirja,
>>
>> Thanks a lot for the comments. And sorry for not being able to reply
>> earlier.
>> Please find some comments  inline.
>>
>> Thanks
>> -Pushpasis
>>
>> On Mon, Jan 16, 2017 at 10:03 PM, Mirja Kuehlewind <ietf@kuehlewind.net
>> <mailto:ietf@kuehlewind.net>> wrote:
>>
>>     Mirja K=C3=BChlewind has entered the following ballot position for
>>     draft-ietf-rtgwg-rlfa-node-protection-10: No Objection
>>
>>     When responding, please keep the subject line intact and reply to al=
l
>>     email addresses included in the To and CC lines. (Feel free to cut
>> this
>>     introductory paragraph, however.)
>>
>>
>>     Please refer to https://www.ietf.org/iesg/stat
>> ement/discuss-criteria.html
>>     <https://www.ietf.org/iesg/statement/discuss-criteria.html>
>>     for more information about IESG DISCUSS and COMMENT positions.
>>
>>
>>     The document, along with other ballot positions, can be found here:
>>     https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-
>> protection/
>>     <https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node
>> -protection/>
>>
>>
>>
>>     ------------------------------------------------------------
>> ----------
>>     COMMENT:
>>     ------------------------------------------------------------
>> ----------
>>
>>     Overall comment: This reads rather like an informational rfc; howeve=
r
>>     given that rfc7490 is standards track, I guess that's fine.
>>
>>     More specific comments:
>>     - More abbreviations could be spelled out to make it easier to read.
>>
>> [Pushpasis] I will try to add as many as I can in the next version :)
>>
>>     - Not sure what section 3 tells me; but I'm also not an expert.
>>
>> [Pushpasis] Section 3 is about a using the same solution proposed to fin=
d
>> a
>> node-protected R-LFA path by running a forward-SPF on the PQ node(s) to
>> select parameters of the same paths discovered, so that the computing
>> router
>> on discovering multiple R-LFA backup paths to a single destination can r=
un
>> some backup-path-selection policies on the same path parameters collecte=
d
>> (while doing computing F-SPF) to select one or more best suited R-LFA
>> backup
>> paths for the destination. Hope it explains :) You may also want to refe=
r
>> to
>> RFC7916 for more explanation.
>>
>
> Still not clear to me. Anyway I'm not an expert and maybe I'm missing
> something. Or let me ask the questions differently: What does this part a=
dd
> to the rest of the doc and why is this a separate section?

[Pushpasis] The solution proposed to solve the first problem in section 2
(i.e. ensuring node-protection with R-LFA) can also be extended to solve
another problem (i.e. collecting parameters used by
backup-selection-algorithm RFC7916 wrt to R-LFA backup paths (this is more
detailed in section 6.2.5.4 of RFC7916). Since the same solution in a
extended form also solved a separate but related problem, this was curved
out as separate section. In summary this document proposes to two separate
but related problems and hence two different sections..  Hope I could
answer this satisfactorily this time.. :)


>
>
>>     - Also section 3: "As already specified in Section 2.3.4 to limit th=
e
>>     computational
>>        overhead of the proposed approach, forward SPF computations MUST =
be
>>        run on a selected subset from the entire set of PQ-nodes computed
>> in
>>        the network, with a finite limit on the number of PQ-nodes in the
>>        subset."
>>        I guess you don't need the upper case MUST here.
>>
>> [Pushpasis] Actually this was suggested to be exactly a MUST in WG
>> discussions on the WG mail
>>
>
> My point was, given this is a MUST in section 2.3.4 and this sentence
> starts with "As already specified in Section 2.3.4" it does have to be an
> upper case MUST here again (because it's correctly normatively specified =
in
> section 2.3.4). However not a big issue.

[Pushpasis] Got it. Will do so..


>
>
>
>>     - Also then in section 2.3.4: "To limit the computational overhead o=
f
>> the
>>     approach proposed, this
>>        document proposes that implementations MUST choose a subset from
>> the
>>        entire set of PQ-nodes computed in the network, with a finite lim=
it
>>        on the number of PQ-nodes in the subset."
>>        Saying "this doc recommends" and "MUST" in the same sentence seem
>>     inaccurate.
>>
>> [Pushpasis] Should I replace 'recommends' with 'specifies' then?
>>
>>     - And also section 2.3.4: Could you maybe suggest or discuss an
>>     appropriate default value?
>>
>> [Pushpasis] I have myself implemented it for Juniper and the default
>> value as
>> 16. I can specify the same as a suggested default. But I am not sure it
>> will
>> be raise any concern in the WG or not. If you suggest, I can go ahead an=
d
>> put
>> this in the next version.
>>
>
> If you think this could raise any concerns in the wg, you should go back
> to the wg mailing list and ask for feedback/confirmation.
>
[Pushpasis] I dont think it will raise a concern. Just wanted to avoid
unwarranted discussion.. :) Anyways I will provide some text in the next
version and ask WG to let know any comments or opinion.

Thanks and Regards,
-Pushpasis


>
>
>
>
>> Thanks once again
>> -Pushpasis
>>
>>

--001a114dbe76524d15054670f9c4
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Mirja,<div><br></div><div>Thanks for your comments once=
 again.. Please find some more answers inline</div><div><br></div><div>-Pus=
hpasis</div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On We=
d, Jan 18, 2017 at 9:02 PM, Mirja K=C3=BChlewind <span dir=3D"ltr">&lt;<a h=
ref=3D"mailto:ietf@kuehlewind.net" target=3D"_blank">ietf@kuehlewind.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">Hi Pushpasis,<br>
<br>
thank for your replies. Please see below!<br>
<br>
Mirja<span class=3D""><br>
<br>
On 18.01.2017 03:42, Pushpasis Sarkar wrote:<br>
</span><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-=
left:1px #ccc solid;padding-left:1ex"><span class=3D"">
Hi Mirja,<br>
<br>
Thanks a lot for the comments. And sorry for not being able to reply earlie=
r.<br>
Please find some comments=C2=A0 inline.<br>
<br>
Thanks<br>
-Pushpasis<br>
<br>
On Mon, Jan 16, 2017 at 10:03 PM, Mirja Kuehlewind &lt;<a href=3D"mailto:ie=
tf@kuehlewind.net" target=3D"_blank">ietf@kuehlewind.net</a><br></span><div=
><div class=3D"h5">
&lt;mailto:<a href=3D"mailto:ietf@kuehlewind.net" target=3D"_blank">ietf@ku=
ehlewind.net</a>&gt;&gt; wrote:<br>
<br>
=C2=A0 =C2=A0 Mirja K=C3=BChlewind has entered the following ballot positio=
n for<br>
=C2=A0 =C2=A0 draft-ietf-rtgwg-rlfa-node-pro<wbr>tection-10: No Objection<b=
r>
<br>
=C2=A0 =C2=A0 When responding, please keep the subject line intact and repl=
y to all<br>
=C2=A0 =C2=A0 email addresses included in the To and CC lines. (Feel free t=
o cut this<br>
=C2=A0 =C2=A0 introductory paragraph, however.)<br>
<br>
<br>
=C2=A0 =C2=A0 Please refer to <a href=3D"https://www.ietf.org/iesg/statemen=
t/discuss-criteria.html" rel=3D"noreferrer" target=3D"_blank">https://www.i=
etf.org/iesg/stat<wbr>ement/discuss-criteria.html</a><br>
=C2=A0 =C2=A0 &lt;<a href=3D"https://www.ietf.org/iesg/statement/discuss-cr=
iteria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/iesg=
/sta<wbr>tement/discuss-criteria.html</a>&gt;<br>
=C2=A0 =C2=A0 for more information about IESG DISCUSS and COMMENT positions=
.<br>
<br>
<br>
=C2=A0 =C2=A0 The document, along with other ballot positions, can be found=
 here:<br>
=C2=A0 =C2=A0 <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-rtgwg-=
rlfa-node-protection/" rel=3D"noreferrer" target=3D"_blank">https://datatra=
cker.ietf.org/d<wbr>oc/draft-ietf-rtgwg-rlfa-node-<wbr>protection/</a><br>
=C2=A0 =C2=A0 &lt;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-rt=
gwg-rlfa-node-protection/" rel=3D"noreferrer" target=3D"_blank">https://dat=
atracker.ietf.org/<wbr>doc/draft-ietf-rtgwg-rlfa-node<wbr>-protection/</a>&=
gt;<br>
<br>
<br>
<br>
=C2=A0 =C2=A0 ------------------------------<wbr>--------------------------=
----<wbr>----------<br>
=C2=A0 =C2=A0 COMMENT:<br>
=C2=A0 =C2=A0 ------------------------------<wbr>--------------------------=
----<wbr>----------<br>
<br>
=C2=A0 =C2=A0 Overall comment: This reads rather like an informational rfc;=
 however<br>
=C2=A0 =C2=A0 given that rfc7490 is standards track, I guess that&#39;s fin=
e.<br>
<br>
=C2=A0 =C2=A0 More specific comments:<br>
=C2=A0 =C2=A0 - More abbreviations could be spelled out to make it easier t=
o read.<br>
<br>
[Pushpasis] I will try to add as many as I can in the next version :)<br>
<br>
=C2=A0 =C2=A0 - Not sure what section 3 tells me; but I&#39;m also not an e=
xpert.<br>
<br>
[Pushpasis] Section 3 is about a using the same solution proposed to find a=
<br>
node-protected R-LFA path by running a forward-SPF on the PQ node(s) to<br>
select parameters of the same paths discovered, so that the computing route=
r<br>
on discovering multiple R-LFA backup paths to a single destination can run<=
br>
some backup-path-selection policies on the same path parameters collected<b=
r>
(while doing computing F-SPF) to select one or more best suited R-LFA backu=
p<br>
paths for the destination. Hope it explains :) You may also want to refer t=
o<br>
RFC7916 for more explanation.<br>
</div></div></blockquote>
<br>
Still not clear to me. Anyway I&#39;m not an expert and maybe I&#39;m missi=
ng something. Or let me ask the questions differently: What does this part =
add to the rest of the doc and why is this a separate section?</blockquote>=
<div>[Pushpasis] The solution proposed to solve the first problem in sectio=
n 2 (i.e. ensuring node-protection with R-LFA) can also be extended to solv=
e another problem (i.e. collecting parameters used by backup-selection-algo=
rithm RFC7916 wrt to R-LFA backup paths (this is more detailed in section 6=
.2.5.4 of RFC7916). Since the same solution in a extended form also solved =
a separate but related problem, this was curved out as separate section. In=
 summary this document proposes to two separate but related problems and he=
nce two different sections..=C2=A0 Hope I could answer this satisfactorily =
this time.. :)</div><div><br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span cl=
ass=3D""><br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<br>
=C2=A0 =C2=A0 - Also section 3: &quot;As already specified in Section 2.3.4=
 to limit the<br>
=C2=A0 =C2=A0 computational<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0overhead of the proposed approach, forward SPF c=
omputations MUST be<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0run on a selected subset from the entire set of =
PQ-nodes computed in<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0the network, with a finite limit on the number o=
f PQ-nodes in the<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0subset.&quot;<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0I guess you don&#39;t need the upper case MUST h=
ere.<br>
<br>
[Pushpasis] Actually this was suggested to be exactly a MUST in WG<br>
discussions on the WG mail<br>
</blockquote>
<br></span>
My point was, given this is a MUST in section 2.3.4 and this sentence start=
s with &quot;As already specified in Section 2.3.4&quot; it does have to be=
 an upper case MUST here again (because it&#39;s correctly normatively spec=
ified in section 2.3.4). However not a big issue.=C2=A0</blockquote><div>[P=
ushpasis] Got it. Will do so..=C2=A0</div><div>=C2=A0</div><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pad=
ding-left:1ex"><span class=3D""><br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<br>
=C2=A0 =C2=A0 - Also then in section 2.3.4: &quot;To limit the computationa=
l overhead of the<br>
=C2=A0 =C2=A0 approach proposed, this<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0document proposes that implementations MUST choo=
se a subset from the<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0entire set of PQ-nodes computed in the network, =
with a finite limit<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0on the number of PQ-nodes in the subset.&quot;<b=
r>
=C2=A0 =C2=A0 =C2=A0 =C2=A0Saying &quot;this doc recommends&quot; and &quot=
;MUST&quot; in the same sentence seem<br>
=C2=A0 =C2=A0 inaccurate.<br>
<br>
[Pushpasis] Should I replace &#39;recommends&#39; with &#39;specifies&#39; =
then?<br>
<br>
=C2=A0 =C2=A0 - And also section 2.3.4: Could you maybe suggest or discuss =
an<br>
=C2=A0 =C2=A0 appropriate default value?<br>
<br>
[Pushpasis] I have myself implemented it for Juniper and the default value =
as<br>
16. I can specify the same as a suggested default. But I am not sure it wil=
l<br>
be raise any concern in the WG or not. If you suggest, I can go ahead and p=
ut<br>
this in the next version.<br>
</blockquote>
<br></span>
If you think this could raise any concerns in the wg, you should go back to=
 the wg mailing list and ask for feedback/confirmation.<br></blockquote><di=
v>[Pushpasis] I dont think it will raise a concern. Just wanted to avoid un=
warranted discussion.. :) Anyways I will provide some text in the next vers=
ion and ask WG to let know any comments or opinion.</div><div><br></div><di=
v>Thanks and Regards,</div><div>-Pushpasis</div><div>=C2=A0</div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc sol=
id;padding-left:1ex">
<br>
<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<br>
Thanks once again<br>
-Pushpasis<br>
<br>
</blockquote>
</blockquote></div><br></div></div>

--001a114dbe76524d15054670f9c4--


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From nobody Thu Jan 19 18:16:34 2017
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From: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
Date: Fri, 20 Jan 2017 07:36:41 +0530
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Subject: =?UTF-8?Q?Re=3A_Mirja_K=C3=BChlewind=27s_No_Objection_on_draft=2Dietf=2Drt?= =?UTF-8?Q?gwg=2Drlfa=2Dnode=2Dprotection=2D10=3A_=28with_COMMENT=29?=
To: Uma Chunduri <uma.chunduri@huawei.com>
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Hi Uma,

Many thanks for the comments..

For the clarification for everyone, the following text in section 2.3.4
already mention about the knob you requested..

"

Implementations MUST choose
   a default value for this limit and may provide user with a
   configuration knob to override the default limit.  Implementations
   MUST also evaluate some default preference criteria while considering
   a PQ-node in this subset.  Finally, implementations MAY also allow
   the user to override the default preference criteria, by providing a
   policy configuration for the same.

"

So there is two knobs this document specifies..
- A knob to set the limit to the number of nodes in the subset of PQ-nodes.
- A policy configuration to let user control which nodes will go in the
subset of PQ-nodes

Thanks
-Pushpasis

On Fri, Jan 20, 2017 at 1:36 AM, Uma Chunduri <uma.chunduri@huawei.com>
wrote:

> One quick comment below  [Uma]:
>
>
>
> --
>
> Uma C.
>
>
>
> *From:* rtgwg [mailto:rtgwg-bounces@ietf.org] *On Behalf Of *Pushpasis
> Sarkar
> *Sent:* Thursday, January 19, 2017 3:39 AM
> *To:* Mirja K=C3=BChlewind <ietf@kuehlewind.net>
> *Cc:* draft-ietf-rtgwg-rlfa-node-protection@ietf.org; rtgwg-chairs <
> rtgwg-chairs@ietf.org>; The IESG <iesg@ietf.org>; RTGWG <rtgwg@ietf.org>
> *Subject:* Re: Mirja K=C3=BChlewind's No Objection on
> draft-ietf-rtgwg-rlfa-node-protection-10: (with COMMENT)
>
>
>
> Hi Mirja,
>
>
>
> Thanks for your comments once again.. Please find some more answers inlin=
e
>
>
>
> -Pushpasis
>
>
>
> On Wed, Jan 18, 2017 at 9:02 PM, Mirja K=C3=BChlewind <ietf@kuehlewind.ne=
t>
> wrote:
>
> Hi Pushpasis,
>
> thank for your replies. Please see below!
>
> Mirja
>
> On 18.01.2017 03:42, Pushpasis Sarkar wrote:
>
> Hi Mirja,
>
> Thanks a lot for the comments. And sorry for not being able to reply
> earlier.
> Please find some comments  inline.
>
> Thanks
> -Pushpasis
>
> On Mon, Jan 16, 2017 at 10:03 PM, Mirja Kuehlewind <ietf@kuehlewind.net
>
> <mailto:ietf@kuehlewind.net>> wrote:
>
>     Mirja K=C3=BChlewind has entered the following ballot position for
>     draft-ietf-rtgwg-rlfa-node-protection-10: No Objection
>
>     When responding, please keep the subject line intact and reply to all
>     email addresses included in the To and CC lines. (Feel free to cut th=
is
>     introductory paragraph, however.)
>
>
>     Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.
> html
>     <https://www.ietf.org/iesg/statement/discuss-criteria.html>
>     for more information about IESG DISCUSS and COMMENT positions.
>
>
>     The document, along with other ballot positions, can be found here:
>     https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-
> node-protection/
>     <https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-
> node-protection/>
>
>
>
>     ---------------------------------------------------------------------=
-
>     COMMENT:
>     ---------------------------------------------------------------------=
-
>
>     Overall comment: This reads rather like an informational rfc; however
>     given that rfc7490 is standards track, I guess that's fine.
>
>     More specific comments:
>     - More abbreviations could be spelled out to make it easier to read.
>
> [Pushpasis] I will try to add as many as I can in the next version :)
>
>     - Not sure what section 3 tells me; but I'm also not an expert.
>
> [Pushpasis] Section 3 is about a using the same solution proposed to find=
 a
> node-protected R-LFA path by running a forward-SPF on the PQ node(s) to
> select parameters of the same paths discovered, so that the computing
> router
> on discovering multiple R-LFA backup paths to a single destination can ru=
n
> some backup-path-selection policies on the same path parameters collected
> (while doing computing F-SPF) to select one or more best suited R-LFA
> backup
> paths for the destination. Hope it explains :) You may also want to refer
> to
> RFC7916 for more explanation.
>
>
> Still not clear to me. Anyway I'm not an expert and maybe I'm missing
> something. Or let me ask the questions differently: What does this part a=
dd
> to the rest of the doc and why is this a separate section?
>
> [Pushpasis] The solution proposed to solve the first problem in section 2
> (i.e. ensuring node-protection with R-LFA) can also be extended to solve
> another problem (i.e. collecting parameters used by
> backup-selection-algorithm RFC7916 wrt to R-LFA backup paths (this is mor=
e
> detailed in section 6.2.5.4 of RFC7916). Since the same solution in a
> extended form also solved a separate but related problem, this was curved
> out as separate section. In summary this document proposes to two separat=
e
> but related problems and hence two different sections..  Hope I could
> answer this satisfactorily this time.. :)
>
>
>
>
>
>
>     - Also section 3: "As already specified in Section 2.3.4 to limit the
>     computational
>        overhead of the proposed approach, forward SPF computations MUST b=
e
>        run on a selected subset from the entire set of PQ-nodes computed =
in
>        the network, with a finite limit on the number of PQ-nodes in the
>        subset."
>        I guess you don't need the upper case MUST here.
>
> [Pushpasis] Actually this was suggested to be exactly a MUST in WG
> discussions on the WG mail
>
>
> My point was, given this is a MUST in section 2.3.4 and this sentence
> starts with "As already specified in Section 2.3.4" it does have to be an
> upper case MUST here again (because it's correctly normatively specified =
in
> section 2.3.4). However not a big issue.
>
> [Pushpasis] Got it. Will do so..
>
>
>
>
>
>
>     - Also then in section 2.3.4: "To limit the computational overhead of
> the
>     approach proposed, this
>        document proposes that implementations MUST choose a subset from t=
he
>        entire set of PQ-nodes computed in the network, with a finite limi=
t
>        on the number of PQ-nodes in the subset."
>        Saying "this doc recommends" and "MUST" in the same sentence seem
>     inaccurate.
>
> [Pushpasis] Should I replace 'recommends' with 'specifies' then?
>
>     - And also section 2.3.4: Could you maybe suggest or discuss an
>     appropriate default value?
>
> [Pushpasis] I have myself implemented it for Juniper and the default valu=
e
> as
> 16. I can specify the same as a suggested default. But I am not sure it
> will
> be raise any concern in the WG or not. If you suggest, I can go ahead and
> put
> this in the next version.
>
>
> If you think this could raise any concerns in the wg, you should go back
> to the wg mailing list and ask for feedback/confirmation.
>
> [Pushpasis] I dont think it will raise a concern. Just wanted to avoid
> unwarranted discussion.. :) Anyways I will provide some text in the next
> version and ask WG to let know any comments or opinion.
>
>
>
> [Uma]: It=E2=80=99s important to have a knob here and as long as this is =
there
> it=E2=80=99s fine (and this aspect is clearly described). This purely dep=
ends on
> how big the ring is but this sounds fine.
>
>
>
> Thanks and Regards,
>
> -Pushpasis
>
>
>
>
>
>
> Thanks once again
> -Pushpasis
>
>
>

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<div dir=3D"ltr">Hi Uma,<div><br></div><div>Many thanks for the comments..=
=C2=A0</div><div><br></div><div>For the clarification for everyone, the fol=
lowing text in section 2.3.4 already mention about the knob you requested..=
=C2=A0</div><div><br></div><div>&quot;</div><div><pre style=3D"box-sizing:b=
order-box;overflow:auto;font-family:&#39;pt mono&#39;,monaco,monospace;font=
-size:14px;padding:10px;margin-top:0px;margin-bottom:10.5px;line-height:1.2=
14;color:rgb(0,0,0);word-break:break-all;word-wrap:break-word;background-co=
lor:rgb(255,253,245);border:1px solid rgb(204,204,204);border-top-left-radi=
us:4px;border-top-right-radius:4px;border-bottom-right-radius:4px;border-bo=
ttom-left-radius:4px">Implementations MUST choose
   a default value for this limit and may provide user with a
   configuration knob to override the default limit.  Implementations
   MUST also evaluate some default preference criteria while considering
   a PQ-node in this subset.  Finally, implementations MAY also allow
   the user to override the default preference criteria, by providing a
   policy configuration for the same.</pre></div><div>&quot;</div><div><br>=
</div><div>So there is two knobs this document specifies..=C2=A0</div><div>=
- A knob to set the limit to the number of nodes in the subset of PQ-nodes.=
</div><div>- A policy configuration to let user control which nodes will go=
 in the subset of PQ-nodes</div><div><br></div><div>Thanks</div><div>-Pushp=
asis</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">O=
n Fri, Jan 20, 2017 at 1:36 AM, Uma Chunduri <span dir=3D"ltr">&lt;<a href=
=3D"mailto:uma.chunduri@huawei.com" target=3D"_blank">uma.chunduri@huawei.c=
om</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"marg=
in: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_-436091198010573297WordSection1">
<p class=3D"MsoNormal"><a name=3D"m_-436091198010573297__MailEndCompose"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;co=
lor:#1f497d">One quick comment below =C2=A0[Uma]:<u></u><u></u></span></a><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><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;color:#1f497d">--</span><span style=3D"font-size:11.=
0pt;font-family:&quot;Freestyle Script&quot;;color:#1f497d"><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;color:#1f497d">Uma C.</span><span style=3D"font-size=
:11.0pt;font-family:&quot;Brush Script MT&quot;;color:#1f497d"><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;color:#1f497d"><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"> rtgwg [mailto:<a href=3D"mailt=
o:rtgwg-bounces@ietf.org" target=3D"_blank">rtgwg-bounces@ietf.org</a><wbr>=
]
<b>On Behalf Of </b>Pushpasis Sarkar<br>
<b>Sent:</b> Thursday, January 19, 2017 3:39 AM<br>
<b>To:</b> Mirja K=C3=BChlewind &lt;<a href=3D"mailto:ietf@kuehlewind.net" =
target=3D"_blank">ietf@kuehlewind.net</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:draft-ietf-rtgwg-rlfa-node-protection@ietf.org=
" target=3D"_blank">draft-ietf-rtgwg-rlfa-node-<wbr>protection@ietf.org</a>=
; rtgwg-chairs &lt;<a href=3D"mailto:rtgwg-chairs@ietf.org" target=3D"_blan=
k">rtgwg-chairs@ietf.org</a>&gt;; The IESG &lt;<a href=3D"mailto:iesg@ietf.=
org" target=3D"_blank">iesg@ietf.org</a>&gt;; RTGWG &lt;<a href=3D"mailto:r=
tgwg@ietf.org" target=3D"_blank">rtgwg@ietf.org</a>&gt;<br>
<b>Subject:</b> Re: Mirja K=C3=BChlewind&#39;s No Objection on draft-ietf-r=
tgwg-rlfa-node-<wbr>protection-10: (with COMMENT)<u></u><u></u></span></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div><div><div class=3D"h5">
<p class=3D"MsoNormal">Hi Mirja,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks for your comments once again.. Please find so=
me more answers inline<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">-Pushpasis<u></u><u></u></p>
</div>
</div></div><div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div><div><div class=3D"h5">
<p class=3D"MsoNormal">On Wed, Jan 18, 2017 at 9:02 PM, Mirja K=C3=BChlewin=
d &lt;<a href=3D"mailto:ietf@kuehlewind.net" target=3D"_blank">ietf@kuehlew=
ind.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">
<p class=3D"MsoNormal">Hi Pushpasis,<br>
<br>
thank for your replies. Please see below!<br>
<br>
Mirja<br>
<br>
On 18.01.2017 03:42, Pushpasis Sarkar 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">
<p class=3D"MsoNormal">Hi Mirja,<br>
<br>
Thanks a lot for the comments. And sorry for not being able to reply earlie=
r.<br>
Please find some comments=C2=A0 inline.<br>
<br>
Thanks<br>
-Pushpasis<br>
<br>
On Mon, Jan 16, 2017 at 10:03 PM, Mirja Kuehlewind &lt;<a href=3D"mailto:ie=
tf@kuehlewind.net" target=3D"_blank">ietf@kuehlewind.net</a><u></u><u></u><=
/p>
<div>
<div>
<p class=3D"MsoNormal">&lt;mailto:<a href=3D"mailto:ietf@kuehlewind.net" ta=
rget=3D"_blank">ietf@kuehlewind.net</a>&gt;&gt; wrote:<br>
<br>
=C2=A0 =C2=A0 Mirja K=C3=BChlewind has entered the following ballot positio=
n for<br>
=C2=A0 =C2=A0 draft-ietf-rtgwg-rlfa-node-<wbr>protection-10: No Objection<b=
r>
<br>
=C2=A0 =C2=A0 When responding, please keep the subject line intact and repl=
y to all<br>
=C2=A0 =C2=A0 email addresses included in the To and CC lines. (Feel free t=
o cut this<br>
=C2=A0 =C2=A0 introductory paragraph, however.)<br>
<br>
<br>
=C2=A0 =C2=A0 Please refer to <a href=3D"https://www.ietf.org/iesg/statemen=
t/discuss-criteria.html" target=3D"_blank">
https://www.ietf.org/iesg/<wbr>statement/discuss-criteria.<wbr>html</a><br>
=C2=A0 =C2=A0 &lt;<a href=3D"https://www.ietf.org/iesg/statement/discuss-cr=
iteria.html" target=3D"_blank">https://www.ietf.org/iesg/<wbr>statement/dis=
cuss-criteria.<wbr>html</a>&gt;<br>
=C2=A0 =C2=A0 for more information about IESG DISCUSS and COMMENT positions=
.<br>
<br>
<br>
=C2=A0 =C2=A0 The document, along with other ballot positions, can be found=
 here:<br>
=C2=A0 =C2=A0 <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-rtgwg-=
rlfa-node-protection/" target=3D"_blank">
https://datatracker.ietf.org/<wbr>doc/draft-ietf-rtgwg-rlfa-<wbr>node-prote=
ction/</a><br>
=C2=A0 =C2=A0 &lt;<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-rt=
gwg-rlfa-node-protection/" target=3D"_blank">https://datatracker.ietf.org/<=
wbr>doc/draft-ietf-rtgwg-rlfa-<wbr>node-protection/</a>&gt;<br>
<br>
<br>
<br>
=C2=A0 =C2=A0 ------------------------------<wbr>--------------------------=
----<wbr>----------<br>
=C2=A0 =C2=A0 COMMENT:<br>
=C2=A0 =C2=A0 ------------------------------<wbr>--------------------------=
----<wbr>----------<br>
<br>
=C2=A0 =C2=A0 Overall comment: This reads rather like an informational rfc;=
 however<br>
=C2=A0 =C2=A0 given that rfc7490 is standards track, I guess that&#39;s fin=
e.<br>
<br>
=C2=A0 =C2=A0 More specific comments:<br>
=C2=A0 =C2=A0 - More abbreviations could be spelled out to make it easier t=
o read.<br>
<br>
[Pushpasis] I will try to add as many as I can in the next version :)<br>
<br>
=C2=A0 =C2=A0 - Not sure what section 3 tells me; but I&#39;m also not an e=
xpert.<br>
<br>
[Pushpasis] Section 3 is about a using the same solution proposed to find a=
<br>
node-protected R-LFA path by running a forward-SPF on the PQ node(s) to<br>
select parameters of the same paths discovered, so that the computing route=
r<br>
on discovering multiple R-LFA backup paths to a single destination can run<=
br>
some backup-path-selection policies on the same path parameters collected<b=
r>
(while doing computing F-SPF) to select one or more best suited R-LFA backu=
p<br>
paths for the destination. Hope it explains :) You may also want to refer t=
o<br>
RFC7916 for more explanation.<u></u><u></u></p>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><br>
Still not clear to me. Anyway I&#39;m not an expert and maybe I&#39;m missi=
ng something. Or let me ask the questions differently: What does this part =
add to the rest of the doc and why is this a separate section?<u></u><u></u=
></p>
</blockquote>
<div>
<p class=3D"MsoNormal">[Pushpasis] The solution proposed to solve the first=
 problem in section 2 (i.e. ensuring node-protection with R-LFA) can also b=
e extended to solve another problem (i.e. collecting parameters used by bac=
kup-selection-algorithm RFC7916 wrt
 to R-LFA backup paths (this is more detailed in section 6.2.5.4 of RFC7916=
). Since the same solution in a extended form also solved a separate but re=
lated problem, this was curved out as separate section. In summary this doc=
ument proposes to two separate but
 related problems and hence two different sections..=C2=A0 Hope I could ans=
wer this satisfactorily this time.. :)<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<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">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><u></u>=C2=A0<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">
<p class=3D"MsoNormal"><br>
=C2=A0 =C2=A0 - Also section 3: &quot;As already specified in Section 2.3.4=
 to limit the<br>
=C2=A0 =C2=A0 computational<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0overhead of the proposed approach, forward SPF c=
omputations MUST be<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0run on a selected subset from the entire set of =
PQ-nodes computed in<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0the network, with a finite limit on the number o=
f PQ-nodes in the<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0subset.&quot;<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0I guess you don&#39;t need the upper case MUST h=
ere.<br>
<br>
[Pushpasis] Actually this was suggested to be exactly a MUST in WG<br>
discussions on the WG mail<u></u><u></u></p>
</blockquote>
<p class=3D"MsoNormal"><br>
My point was, given this is a MUST in section 2.3.4 and this sentence start=
s with &quot;As already specified in Section 2.3.4&quot; it does have to be=
 an upper case MUST here again (because it&#39;s correctly normatively spec=
ified in section 2.3.4). However not a big issue.=C2=A0<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">[Pushpasis] Got it. Will do so..=C2=A0<u></u><u></u>=
</p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<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">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><u></u>=C2=A0<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">
<p class=3D"MsoNormal"><br>
=C2=A0 =C2=A0 - Also then in section 2.3.4: &quot;To limit the computationa=
l overhead of the<br>
=C2=A0 =C2=A0 approach proposed, this<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0document proposes that implementations MUST choo=
se a subset from the<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0entire set of PQ-nodes computed in the network, =
with a finite limit<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0on the number of PQ-nodes in the subset.&quot;<b=
r>
=C2=A0 =C2=A0 =C2=A0 =C2=A0Saying &quot;this doc recommends&quot; and &quot=
;MUST&quot; in the same sentence seem<br>
=C2=A0 =C2=A0 inaccurate.<br>
<br>
[Pushpasis] Should I replace &#39;recommends&#39; with &#39;specifies&#39; =
then?<br>
<br>
=C2=A0 =C2=A0 - And also section 2.3.4: Could you maybe suggest or discuss =
an<br>
=C2=A0 =C2=A0 appropriate default value?<br>
<br>
[Pushpasis] I have myself implemented it for Juniper and the default value =
as<br>
16. I can specify the same as a suggested default. But I am not sure it wil=
l<br>
be raise any concern in the WG or not. If you suggest, I can go ahead and p=
ut<br>
this in the next version.<u></u><u></u></p>
</blockquote>
<p class=3D"MsoNormal"><br>
If you think this could raise any concerns in the wg, you should go back to=
 the wg mailing list and ask for feedback/confirmation.<u></u><u></u></p>
</blockquote>
</div></div><div><div><div class=3D"h5">
<p class=3D"MsoNormal">[Pushpasis] I dont think it will raise a concern. Ju=
st wanted to avoid unwarranted discussion.. :) Anyways I will provide some =
text in the next version and ask WG to let know any comments or opinion.<u>=
</u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
</div></div><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-fam=
ily:&quot;Calibri&quot;,sans-serif;color:#1f497d">[Uma]: It=E2=80=99s impor=
tant to have a knob here and as long as this is there it=E2=80=99s fine (an=
d this aspect is clearly described). This purely depends on how big the rin=
g
 is but this sounds fine.<u></u><u></u></span></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks and Regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">-Pushpasis<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<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">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
<br>
<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">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
Thanks once again<br>
-Pushpasis<u></u><u></u></p>
</blockquote>
</blockquote>
</span></div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div>
</div>

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

--94eb2c188a4adc1e0505467d19a2--


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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 Routing Area Working Group of the IETF.

        Title           : Remote-LFA Node Protection and Manageability
        Authors         : Pushpasis Sarkar
                          Shraddha Hegde
                          Chris Bowers
                          Hannes Gredler
                          Stephane Litkowski
	Filename        : draft-ietf-rtgwg-rlfa-node-protection-11.txt
	Pages           : 21
	Date            : 2017-01-19

Abstract:
   The loop-free alternates computed following the current Remote-LFA
   specification guarantees only link-protection.  The resulting Remote-
   LFA nexthops (also called PQ-nodes), may not guarantee node-
   protection for all destinations being protected by it.

   This document describes an extension to the Remote Loop-Free based IP
   fast reroute mechanisms described in [RFC7490], that describes
   procedures for determining if a given PQ-node provides node-
   protection for a specific destination or not.  The document also
   shows how the same procedure can be utilized for collection of
   complete characteristics for alternate paths.  Knowledge about the
   characteristics of all alternate path is precursory to apply operator
   defined policy for eliminating paths not fitting constraints.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-rtgwg-rlfa-node-protection-11

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-rtgwg-rlfa-node-protection-11


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: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
Date: Fri, 20 Jan 2017 08:46:17 +0530
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Subject: Fwd: New Version Notification for draft-ietf-rtgwg-rlfa-node-protection-11.txt
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Hi RTGWG members,

I have uploaded another version of this draft addressing all the IESG
review comments received so far. Request you all review it once more and
let me know if you have any comments.

Thanks and Regards,
-Pushpasis

---------- Forwarded message ----------
From: <internet-drafts@ietf.org>
Date: Fri, Jan 20, 2017 at 8:41 AM
Subject: New Version Notification for
draft-ietf-rtgwg-rlfa-node-protection-11.txt
To: Pushpasis Sarkar <pushpasis.ietf@gmail.com>, Shraddha Hegde <
shraddha@juniper.net>, Chris Bowers <cbowers@juniper.net>, Hannes Gredler <
hannes@rtbrick.com>, Stephane Litkowski <stephane.litkowski@orange.com>



A new version of I-D, draft-ietf-rtgwg-rlfa-node-protection-11.txt
has been successfully submitted by Pushpasis Sarkar and posted to the
IETF repository.

Name:           draft-ietf-rtgwg-rlfa-node-protection
Revision:       11
Title:          Remote-LFA Node Protection and Manageability
Document date:  2017-01-20
Group:          rtgwg
Pages:          21
URL:            https://www.ietf.org/internet-drafts/draft-ietf-rtgwg-rlfa-
node-protection-11.txt
Status:         https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-
node-protection/
Htmlized:       https://tools.ietf.org/html/draft-ietf-rtgwg-rlfa-node-
protection-11
Diff:           https://www.ietf.org/rfcdiff?url2=draft-ietf-rtgwg-rlfa-
node-protection-11

Abstract:
   The loop-free alternates computed following the current Remote-LFA
   specification guarantees only link-protection.  The resulting Remote-
   LFA nexthops (also called PQ-nodes), may not guarantee node-
   protection for all destinations being protected by it.

   This document describes an extension to the Remote Loop-Free based IP
   fast reroute mechanisms described in [RFC7490], that describes
   procedures for determining if a given PQ-node provides node-
   protection for a specific destination or not.  The document also
   shows how the same procedure can be utilized for collection of
   complete characteristics for alternate paths.  Knowledge about the
   characteristics of all alternate path is precursory to apply operator
   defined policy for eliminating paths not fitting constraints.





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.

The IETF Secretariat

--94eb2c0b26b8c142d005467e12d9
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<div dir=3D"ltr">Hi RTGWG members,<div><br></div><div>I have uploaded anoth=
er version of this draft addressing all the IESG review comments received s=
o far. Request you all review it once more and let me know if you have any =
comments.</div><div><br></div><div>Thanks and Regards,</div><div>-Pushpasis=
</div><div><br><div class=3D"gmail_quote">---------- Forwarded message ----=
------<br>From: <b class=3D"gmail_sendername"></b> <span dir=3D"ltr">&lt;<a=
 href=3D"mailto:internet-drafts@ietf.org">internet-drafts@ietf.org</a>&gt;<=
/span><br>Date: Fri, Jan 20, 2017 at 8:41 AM<br>Subject: New Version Notifi=
cation for draft-ietf-rtgwg-rlfa-node-protection-11.txt<br>To: Pushpasis Sa=
rkar &lt;<a href=3D"mailto:pushpasis.ietf@gmail.com">pushpasis.ietf@gmail.c=
om</a>&gt;, Shraddha Hegde &lt;<a href=3D"mailto:shraddha@juniper.net">shra=
ddha@juniper.net</a>&gt;, Chris Bowers &lt;<a href=3D"mailto:cbowers@junipe=
r.net">cbowers@juniper.net</a>&gt;, Hannes Gredler &lt;<a href=3D"mailto:ha=
nnes@rtbrick.com">hannes@rtbrick.com</a>&gt;, Stephane Litkowski &lt;<a hre=
f=3D"mailto:stephane.litkowski@orange.com">stephane.litkowski@orange.com</a=
>&gt;<br><br><br><br>
A new version of I-D, draft-ietf-rtgwg-rlfa-node-<wbr>protection-11.txt<br>
has been successfully submitted by Pushpasis Sarkar and posted to the<br>
IETF repository.<br>
<br>
Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-ietf-rtgwg-rlfa-node-<w=
br>protection<br>
Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A011<br>
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Remote-LFA Node Protection and Man=
ageability<br>
Document date:=C2=A0 2017-01-20<br>
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 rtgwg<br>
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 21<br>
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"https://www.ietf.o=
rg/internet-drafts/draft-ietf-rtgwg-rlfa-node-protection-11.txt" rel=3D"nor=
eferrer" target=3D"_blank">https://www.ietf.org/internet-<wbr>drafts/draft-=
ietf-rtgwg-rlfa-<wbr>node-protection-11.txt</a><br>
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.iet=
f.org/doc/draft-ietf-rtgwg-rlfa-node-protection/" rel=3D"noreferrer" target=
=3D"_blank">https://datatracker.ietf.org/<wbr>doc/draft-ietf-rtgwg-rlfa-<wb=
r>node-protection/</a><br>
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://tools.ietf.org/html/=
draft-ietf-rtgwg-rlfa-node-protection-11" rel=3D"noreferrer" target=3D"_bla=
nk">https://tools.ietf.org/html/<wbr>draft-ietf-rtgwg-rlfa-node-<wbr>protec=
tion-11</a><br>
Diff:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://www.ietf.o=
rg/rfcdiff?url2=3Ddraft-ietf-rtgwg-rlfa-node-protection-11" rel=3D"noreferr=
er" target=3D"_blank">https://www.ietf.org/rfcdiff?<wbr>url2=3Ddraft-ietf-r=
tgwg-rlfa-<wbr>node-protection-11</a><br>
<br>
Abstract:<br>
=C2=A0 =C2=A0The loop-free alternates computed following the current Remote=
-LFA<br>
=C2=A0 =C2=A0specification guarantees only link-protection.=C2=A0 The resul=
ting Remote-<br>
=C2=A0 =C2=A0LFA nexthops (also called PQ-nodes), may not guarantee node-<b=
r>
=C2=A0 =C2=A0protection for all destinations being protected by it.<br>
<br>
=C2=A0 =C2=A0This document describes an extension to the Remote Loop-Free b=
ased IP<br>
=C2=A0 =C2=A0fast reroute mechanisms described in [RFC7490], that describes=
<br>
=C2=A0 =C2=A0procedures for determining if a given PQ-node provides node-<b=
r>
=C2=A0 =C2=A0protection for a specific destination or not.=C2=A0 The docume=
nt also<br>
=C2=A0 =C2=A0shows how the same procedure can be utilized for collection of=
<br>
=C2=A0 =C2=A0complete characteristics for alternate paths.=C2=A0 Knowledge =
about the<br>
=C2=A0 =C2=A0characteristics of all alternate path is precursory to apply o=
perator<br>
=C2=A0 =C2=A0defined policy for eliminating paths not fitting constraints.<=
br>
<br>
<br>
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at <a href=3D"http://tool=
s.ietf.org" rel=3D"noreferrer" target=3D"_blank">tools.ietf.org</a>.<br>
<br>
The IETF Secretariat<br>
<br>
</div><br></div></div>

--94eb2c0b26b8c142d005467e12d9--


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Subject: Re: Benoit Claise's Discuss on draft-ietf-rtgwg-rlfa-node-protection-10: (with DISCUSS and COMMENT)
To: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
References: <148481984787.10321.18432401406725499674.idtracker@ietfa.amsl.com> <CAEFuwkjYQSaWU9ZAVsJdJ_Ja=modj1mLXuOW9G-BOoTjF9LyQA@mail.gmail.com>
From: Benoit Claise <bclaise@cisco.com>
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Cc: rtgwg-chairs <rtgwg-chairs@ietf.org>, draft-ietf-rtgwg-rlfa-node-protection@ietf.org, The IESG <iesg@ietf.org>, "Eric Vyncke \(evyncke\)" <evyncke@cisco.com>, RTGWG <rtgwg@ietf.org>
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On 1/19/2017 12:05 PM, Pushpasis Sarkar wrote:
> Hi Benoit,
>
> Many many thanks for your review comments. Please find answers inline...
>
> On Thu, Jan 19, 2017 at 3:27 PM, Benoit Claise <bclaise@cisco.com 
> <mailto:bclaise@cisco.com>> wrote:
>
>     Benoit Claise has entered the following ballot position for
>     draft-ietf-rtgwg-rlfa-node-protection-10: Discuss
>
>     When responding, please keep the subject line intact and reply to all
>     email addresses included in the To and CC lines. (Feel free to cut
>     this
>     introductory paragraph, however.)
>
>
>     Please refer to
>     https://www.ietf.org/iesg/statement/discuss-criteria.html
>     <https://www.ietf.org/iesg/statement/discuss-criteria.html>
>     for more information about IESG DISCUSS and COMMENT positions.
>
>
>     The document, along with other ballot positions, can be found here:
>     https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/
>     <https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/>
>
>
>
>     ----------------------------------------------------------------------
>     DISCUSS:
>     ----------------------------------------------------------------------
>
>     This document mentions manageability in his title. Hence my special
>     focus.
>     I'm with Eric Vyncke here. His OPS DIR review is:
>
>     Not being an expert in LFA, the review focus was only on operation.
>     And, due to the density and specialization of the I-D, I would like to
>     ask the authors whether they read RFC 5706 about 'ops and mgmt
>     guidelines', i.e., to check whether this I-D considered migration
>     from an
>     existing LFA to the new one, interoperations with previous LFA and how
>     correct operations can be verified.
>     As the core topic is about loop-free alternates, we can assume
>     that fault
>     management and operations are at the core of this I-D. But, I
>     encourage
>     the authors to quickly review their document with RFC 5706 in mind.
>
>     After reading the document (and with basic knowledge of RLFA), I'm
>     unable
>     to tell at this point if RFC 7916 is still valid for this new
>     functionality, if it needs to be updated, or even if
>     https://tools.ietf.org/html/draft-ietf-rtgwg-rlfa-node-protection-10#section-3
>     <https://tools.ietf.org/html/draft-ietf-rtgwg-rlfa-node-protection-10#section-3>
>     is complete in light of RFC 5706. I'll be watching the discussion with
>     interest.
>
> [Pushpasis]
> I have provided an elaborate explanation in reply to OPS DIR review 
> comments from Eric. Request you to please refer to that.. :) And 
> please let us know if we are missing anything specific here..
>
>
>     ----------------------------------------------------------------------
>     COMMENT:
>     ----------------------------------------------------------------------
>
>     -  The resulting Remote-LFA
>        alternate nexthops (also referred to as the PQ-nodes) may not
>     provide
>        node-protection for all destinations covered by the same, in
>     case of
>        failure of the primary nexthop node.
>
>     Covered by the same?
>
my point is: aren't you missing a word after "by the same"?

Regards, B.
> [Pushpasis] The reference here is to the PQ-node computed using 
> RFC7490 specification which only gaurantees protection against failure 
> of first-hop link and not against failure of first-hop node(or router)..
> I will try to change the text to clarify this..
>
>
>     - There are also some nits and typos such as " uitilized" in the
>     abstract.
>
> [Pushpasis] I will take care of this in a next version shortly.
>
> Thanks once again and Regards,
> -Pushpasis
>


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    <div class="moz-cite-prefix">On 1/19/2017 12:05 PM, Pushpasis Sarkar
      wrote:<br>
    </div>
    <blockquote
cite="mid:CAEFuwkjYQSaWU9ZAVsJdJ_Ja=modj1mLXuOW9G-BOoTjF9LyQA@mail.gmail.com"
      type="cite">
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      <div dir="ltr">Hi Benoit,
        <div><br>
        </div>
        <div>Many many thanks for your review comments. Please find
          answers inline...</div>
        <div class="gmail_extra"><br>
          <div class="gmail_quote">On Thu, Jan 19, 2017 at 3:27 PM,
            Benoit Claise <span dir="ltr">&lt;<a moz-do-not-send="true"
                href="mailto:bclaise@cisco.com" target="_blank">bclaise@cisco.com</a>&gt;</span>
            wrote:<br>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">Benoit
              Claise has entered the following ballot position for<br>
              draft-ietf-rtgwg-rlfa-node-<wbr>protection-10: Discuss<br>
              <br>
              When responding, please keep the subject line intact and
              reply to all<br>
              email addresses included in the To and CC lines. (Feel
              free to cut this<br>
              introductory paragraph, however.)<br>
              <br>
              <br>
              Please refer to <a moz-do-not-send="true"
                href="https://www.ietf.org/iesg/statement/discuss-criteria.html"
                rel="noreferrer" target="_blank">https://www.ietf.org/iesg/<wbr>statement/discuss-criteria.<wbr>html</a><br>
              for more information about IESG DISCUSS and COMMENT
              positions.<br>
              <br>
              <br>
              The document, along with other ballot positions, can be
              found here:<br>
              <a moz-do-not-send="true"
href="https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/"
                rel="noreferrer" target="_blank">https://datatracker.ietf.org/<wbr>doc/draft-ietf-rtgwg-rlfa-<wbr>node-protection/</a><br>
              <br>
              <br>
              <br>
              ------------------------------<wbr>------------------------------<wbr>----------<br>
              DISCUSS:<br>
              ------------------------------<wbr>------------------------------<wbr>----------<br>
              <br>
              This document mentions manageability in his title. Hence
              my special<br>
              focus.<br>
              I'm with Eric Vyncke here. His OPS DIR review is:<br>
              <br>
              Not being an expert in LFA, the review focus was only on
              operation.<br>
              And, due to the density and specialization of the I-D, I
              would like to<br>
              ask the authors whether they read RFC 5706 about 'ops and
              mgmt<br>
              guidelines', i.e., to check whether this I-D considered
              migration from an<br>
              existing LFA to the new one, interoperations with previous
              LFA and how<br>
              correct operations can be verified.<br>
              As the core topic is about loop-free alternates, we can
              assume that fault<br>
              management and operations are at the core of this I-D.
              But, I encourage<br>
              the authors to quickly review their document with RFC 5706
              in mind.<br>
              <br>
              After reading the document (and with basic knowledge of
              RLFA), I'm unable<br>
              to tell at this point if RFC 7916 is still valid for this
              new<br>
              functionality, if it needs to be updated, or even if<br>
              <a moz-do-not-send="true"
href="https://tools.ietf.org/html/draft-ietf-rtgwg-rlfa-node-protection-10#section-3"
                rel="noreferrer" target="_blank">https://tools.ietf.org/html/<wbr>draft-ietf-rtgwg-rlfa-node-<wbr>protection-10#section-3</a><br>
              is complete in light of RFC 5706. I'll be watching the
              discussion with<br>
              interest.<br>
              <br>
            </blockquote>
            <div>[Pushpasis]</div>
            <div>I have provided an elaborate explanation in reply to
              OPS DIR review comments from Eric. Request you to please
              refer to that.. :) And please let us know if we are
              missing anything specific here.. </div>
            <div><br>
            </div>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <br>
              ------------------------------<wbr>------------------------------<wbr>----------<br>
              COMMENT:<br>
              ------------------------------<wbr>------------------------------<wbr>----------<br>
              <br>
              -  The resulting Remote-LFA<br>
                 alternate nexthops (also referred to as the PQ-nodes)
              may not<br>
              provide<br>
                 node-protection for all destinations covered by the
              same, in case of<br>
                 failure of the primary nexthop node.<br>
              <br>
              Covered by the same?<br>
            </blockquote>
          </div>
        </div>
      </div>
    </blockquote>
    my point is: aren't you missing a word after "by the same"?<br>
    <br>
    Regards, B.<br>
    <blockquote
cite="mid:CAEFuwkjYQSaWU9ZAVsJdJ_Ja=modj1mLXuOW9G-BOoTjF9LyQA@mail.gmail.com"
      type="cite">
      <div dir="ltr">
        <div class="gmail_extra">
          <div class="gmail_quote">
            <div>[Pushpasis] The reference here is to the PQ-node
              computed using RFC7490 specification which only gaurantees
              protection against failure of first-hop link and not
              against failure of first-hop node(or router)..  </div>
            <div>I will try to change the text to clarify this..</div>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <br>
              - There are also some nits and typos such as " uitilized"
              in the<br>
              abstract.<br>
            </blockquote>
            <div>[Pushpasis] I will take care of this in a next version
              shortly.</div>
            <div><br>
            </div>
            <div>Thanks once again and Regards,</div>
            <div>-Pushpasis</div>
          </div>
          <br>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
</html>

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From: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
Date: Fri, 20 Jan 2017 14:59:56 +0530
Message-ID: <CAEFuwkhOOiNLkrRkpGkHtVGeybi6-KK67msGpPHrbT-ENYUYjw@mail.gmail.com>
Subject: Re: Benoit Claise's Discuss on draft-ietf-rtgwg-rlfa-node-protection-10: (with DISCUSS and COMMENT)
To: Benoit Claise <bclaise@cisco.com>
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Cc: rtgwg-chairs <rtgwg-chairs@ietf.org>, draft-ietf-rtgwg-rlfa-node-protection@ietf.org, The IESG <iesg@ietf.org>, "Eric Vyncke \(evyncke\)" <evyncke@cisco.com>, RTGWG <rtgwg@ietf.org>
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--94eb2c0af9a80858df0546834b7c
Content-Type: text/plain; charset=UTF-8

Hi Benoit,

Sure. I will add this clarification too in the next version.

Thanks
-Pushpasis

On Fri, Jan 20, 2017 at 2:10 PM, Benoit Claise <bclaise@cisco.com> wrote:

> On 1/19/2017 12:05 PM, Pushpasis Sarkar wrote:
>
> Hi Benoit,
>
> Many many thanks for your review comments. Please find answers inline...
>
> On Thu, Jan 19, 2017 at 3:27 PM, Benoit Claise <bclaise@cisco.com> wrote:
>
>> Benoit Claise has entered the following ballot position for
>> draft-ietf-rtgwg-rlfa-node-protection-10: Discuss
>>
>> When responding, please keep the subject line intact and reply to all
>> email addresses included in the To and CC lines. (Feel free to cut this
>> introductory paragraph, however.)
>>
>>
>> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
>> for more information about IESG DISCUSS and COMMENT positions.
>>
>>
>> The document, along with other ballot positions, can be found here:
>> https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/
>>
>>
>>
>> ----------------------------------------------------------------------
>> DISCUSS:
>> ----------------------------------------------------------------------
>>
>> This document mentions manageability in his title. Hence my special
>> focus.
>> I'm with Eric Vyncke here. His OPS DIR review is:
>>
>> Not being an expert in LFA, the review focus was only on operation.
>> And, due to the density and specialization of the I-D, I would like to
>> ask the authors whether they read RFC 5706 about 'ops and mgmt
>> guidelines', i.e., to check whether this I-D considered migration from an
>> existing LFA to the new one, interoperations with previous LFA and how
>> correct operations can be verified.
>> As the core topic is about loop-free alternates, we can assume that fault
>> management and operations are at the core of this I-D. But, I encourage
>> the authors to quickly review their document with RFC 5706 in mind.
>>
>> After reading the document (and with basic knowledge of RLFA), I'm unable
>> to tell at this point if RFC 7916 is still valid for this new
>> functionality, if it needs to be updated, or even if
>> https://tools.ietf.org/html/draft-ietf-rtgwg-rlfa-node-prote
>> ction-10#section-3
>> is complete in light of RFC 5706. I'll be watching the discussion with
>> interest.
>>
>> [Pushpasis]
> I have provided an elaborate explanation in reply to OPS DIR review
> comments from Eric. Request you to please refer to that.. :) And please let
> us know if we are missing anything specific here..
>
>
>> ----------------------------------------------------------------------
>> COMMENT:
>> ----------------------------------------------------------------------
>>
>> -  The resulting Remote-LFA
>>    alternate nexthops (also referred to as the PQ-nodes) may not
>> provide
>>    node-protection for all destinations covered by the same, in case of
>>    failure of the primary nexthop node.
>>
>> Covered by the same?
>>
> my point is: aren't you missing a word after "by the same"?
>
> Regards, B.
>
> [Pushpasis] The reference here is to the PQ-node computed using RFC7490
> specification which only gaurantees protection against failure of first-hop
> link and not against failure of first-hop node(or router)..
> I will try to change the text to clarify this..
>
>>
>> - There are also some nits and typos such as " uitilized" in the
>> abstract.
>>
> [Pushpasis] I will take care of this in a next version shortly.
>
> Thanks once again and Regards,
> -Pushpasis
>
>
>

--94eb2c0af9a80858df0546834b7c
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Benoit,<div><br></div><div>Sure. I will add this clarif=
ication too in the next version.</div><div><br></div><div>Thanks</div><div>=
-Pushpasis</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_qu=
ote">On Fri, Jan 20, 2017 at 2:10 PM, Benoit Claise <span dir=3D"ltr">&lt;<=
a href=3D"mailto:bclaise@cisco.com" target=3D"_blank">bclaise@cisco.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">
 =20
   =20
 =20
  <div bgcolor=3D"#FFFFFF" text=3D"#000000"><div><div class=3D"h5">
    <div class=3D"m_8040583485265324113moz-cite-prefix">On 1/19/2017 12:05 =
PM, Pushpasis Sarkar
      wrote:<br>
    </div>
    <blockquote type=3D"cite">
     =20
      <div dir=3D"ltr">Hi Benoit,
        <div><br>
        </div>
        <div>Many many thanks for your review comments. Please find
          answers inline...</div>
        <div class=3D"gmail_extra"><br>
          <div class=3D"gmail_quote">On Thu, Jan 19, 2017 at 3:27 PM,
            Benoit Claise <span dir=3D"ltr">&lt;<a href=3D"mailto:bclaise@c=
isco.com" target=3D"_blank">bclaise@cisco.com</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">Benoit
              Claise has entered the following ballot position for<br>
              draft-ietf-rtgwg-rlfa-node-pro<wbr>tection-10: Discuss<br>
              <br>
              When responding, please keep the subject line intact and
              reply to all<br>
              email addresses included in the To and CC lines. (Feel
              free to cut this<br>
              introductory paragraph, however.)<br>
              <br>
              <br>
              Please refer to <a href=3D"https://www.ietf.org/iesg/statemen=
t/discuss-criteria.html" rel=3D"noreferrer" target=3D"_blank">https://www.i=
etf.org/iesg/stat<wbr>ement/discuss-criteria.html</a><br>
              for more information about IESG DISCUSS and COMMENT
              positions.<br>
              <br>
              <br>
              The document, along with other ballot positions, can be
              found here:<br>
              <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-rtgwg-=
rlfa-node-protection/" rel=3D"noreferrer" target=3D"_blank">https://datatra=
cker.ietf.org/d<wbr>oc/draft-ietf-rtgwg-rlfa-node-<wbr>protection/</a><br>
              <br>
              <br>
              <br>
              ------------------------------<wbr>--------------------------=
----<wbr>----------<br>
              DISCUSS:<br>
              ------------------------------<wbr>--------------------------=
----<wbr>----------<br>
              <br>
              This document mentions manageability in his title. Hence
              my special<br>
              focus.<br>
              I&#39;m with Eric Vyncke here. His OPS DIR review is:<br>
              <br>
              Not being an expert in LFA, the review focus was only on
              operation.<br>
              And, due to the density and specialization of the I-D, I
              would like to<br>
              ask the authors whether they read RFC 5706 about &#39;ops and
              mgmt<br>
              guidelines&#39;, i.e., to check whether this I-D considered
              migration from an<br>
              existing LFA to the new one, interoperations with previous
              LFA and how<br>
              correct operations can be verified.<br>
              As the core topic is about loop-free alternates, we can
              assume that fault<br>
              management and operations are at the core of this I-D.
              But, I encourage<br>
              the authors to quickly review their document with RFC 5706
              in mind.<br>
              <br>
              After reading the document (and with basic knowledge of
              RLFA), I&#39;m unable<br>
              to tell at this point if RFC 7916 is still valid for this
              new<br>
              functionality, if it needs to be updated, or even if<br>
              <a href=3D"https://tools.ietf.org/html/draft-ietf-rtgwg-rlfa-=
node-protection-10#section-3" rel=3D"noreferrer" target=3D"_blank">https://=
tools.ietf.org/html/dr<wbr>aft-ietf-rtgwg-rlfa-node-prote<wbr>ction-10#sect=
ion-3</a><br>
              is complete in light of RFC 5706. I&#39;ll be watching the
              discussion with<br>
              interest.<br>
              <br>
            </blockquote>
            <div>[Pushpasis]</div>
            <div>I have provided an elaborate explanation in reply to
              OPS DIR review comments from Eric. Request you to please
              refer to that.. :) And please let us know if we are
              missing anything specific here..=C2=A0</div>
            <div><br>
            </div>
            <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bo=
rder-left:1px #ccc solid;padding-left:1ex">
              <br>
              ------------------------------<wbr>--------------------------=
----<wbr>----------<br>
              COMMENT:<br>
              ------------------------------<wbr>--------------------------=
----<wbr>----------<br>
              <br>
              -=C2=A0 The resulting Remote-LFA<br>
              =C2=A0 =C2=A0alternate nexthops (also referred to as the PQ-n=
odes)
              may not<br>
              provide<br>
              =C2=A0 =C2=A0node-protection for all destinations covered by =
the
              same, in case of<br>
              =C2=A0 =C2=A0failure of the primary nexthop node.<br>
              <br>
              Covered by the same?<br>
            </blockquote>
          </div>
        </div>
      </div>
    </blockquote></div></div>
    my point is: aren&#39;t you missing a word after &quot;by the same&quot=
;?<br>
    <br>
    Regards, B.<span class=3D""><br>
    <blockquote type=3D"cite">
      <div dir=3D"ltr">
        <div class=3D"gmail_extra">
          <div class=3D"gmail_quote">
            <div>[Pushpasis] The reference here is to the PQ-node
              computed using RFC7490 specification which only gaurantees
              protection against failure of first-hop link and not
              against failure of first-hop node(or router).. =C2=A0</div>
            <div>I will try to change the text to clarify this..</div>
            <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bo=
rder-left:1px #ccc solid;padding-left:1ex">
              <br>
              - There are also some nits and typos such as &quot; uitilized=
&quot;
              in the<br>
              abstract.<br>
            </blockquote>
            <div>[Pushpasis] I will take care of this in a next version
              shortly.</div>
            <div><br>
            </div>
            <div>Thanks once again and Regards,</div>
            <div>-Pushpasis</div>
          </div>
          <br>
        </div>
      </div>
    </blockquote>
    <br>
  </span></div>

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

--94eb2c0af9a80858df0546834b7c--


From nobody Fri Jan 20 03:11:45 2017
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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 Routing Area Working Group of the IETF.

        Title           : Remote-LFA Node Protection and Manageability
        Authors         : Pushpasis Sarkar
                          Shraddha Hegde
                          Chris Bowers
                          Hannes Gredler
                          Stephane Litkowski
	Filename        : draft-ietf-rtgwg-rlfa-node-protection-12.txt
	Pages           : 21
	Date            : 2017-01-20

Abstract:
   The loop-free alternates computed following the current Remote-LFA
   specification guarantees only link-protection.  The resulting Remote-
   LFA nexthops (also called PQ-nodes), may not guarantee node-
   protection for all destinations being protected by it.

   This document describes procedures for determining if a given PQ-node
   provides node-protection for a specific destination or not.  The
   document also shows how the same procedure can be utilized for
   collection of complete characteristics for alternate paths.
   Knowledge about the characteristics of all alternate path is
   precursory to apply operator defined policy for eliminating paths not
   fitting constraints.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-rtgwg-rlfa-node-protection-12

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-rtgwg-rlfa-node-protection-12


Please note that it may take a couple of minutes from the time of submission
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From nobody Fri Jan 20 03:19:43 2017
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Benoit Claise has entered the following ballot position for
draft-ietf-rtgwg-rlfa-node-protection-12: No Objection

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From nobody Fri Jan 20 03:29:40 2017
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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 Routing Area Working Group of the IETF.

        Title           : Remote-LFA Node Protection and Manageability
        Authors         : Pushpasis Sarkar
                          Shraddha Hegde
                          Chris Bowers
                          Hannes Gredler
                          Stephane Litkowski
	Filename        : draft-ietf-rtgwg-rlfa-node-protection-13.txt
	Pages           : 21
	Date            : 2017-01-20

Abstract:
   The loop-free alternates computed following the current Remote-LFA
   specification guarantees only link-protection.  The resulting Remote-
   LFA nexthops (also called PQ-nodes), may not guarantee node-
   protection for all destinations being protected by it.

   This document describes an extension to the Remote Loop-Free based IP
   fast reroute mechanisms, that specifes procedures for determining if
   a given PQ-node provides node-protection for a specific destination
   or not.  The document also shows how the same procedure can be
   utilized for collection of complete characteristics for alternate
   paths.  Knowledge about the characteristics of all alternate path is
   precursory to apply operator defined policy for eliminating paths not
   fitting constraints.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-rtgwg-rlfa-node-protection-13

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-rtgwg-rlfa-node-protection-13


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: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
Date: Fri, 20 Jan 2017 17:03:11 +0530
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Subject: Re: Benoit Claise's No Objection on draft-ietf-rtgwg-rlfa-node-protection-12
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--001a114e62fcc61f4b05468503cb
Content-Type: text/plain; charset=UTF-8

Hi Benoit,

I am sorry to say that I have accidentally changed some text in Abstract in
version 12. I have uploaded another version 13 reversing back the changes
but trying to avoid a NIT that was flagging.. So request you to approve
version 13 as well..

Once again I regret the inconvenience caused..

Thanks and regards,
-Pushpasis


On Fri, Jan 20, 2017 at 4:49 PM, Benoit Claise <bclaise@cisco.com> wrote:

> Benoit Claise has entered the following ballot position for
> draft-ietf-rtgwg-rlfa-node-protection-12: No Objection
>
> When responding, please keep the subject line intact and reply to all
> email addresses included in the To and CC lines. (Feel free to cut this
> introductory paragraph, however.)
>
>
> Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
> for more information about IESG DISCUSS and COMMENT positions.
>
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/
>
>
> There are no remarks associated with this position.
>
>
>
>
>

--001a114e62fcc61f4b05468503cb
Content-Type: text/html; charset=UTF-8
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<div dir=3D"ltr">Hi Benoit,<div><br></div><div>I am sorry to say that I hav=
e accidentally changed some text in Abstract in version 12. I have uploaded=
 another version 13 reversing back the changes but trying to avoid a NIT th=
at was flagging.. So request you to approve version 13 as well..=C2=A0</div=
><div><br></div><div>Once again I regret the inconvenience caused..=C2=A0</=
div><div><br></div><div>Thanks and regards,</div><div>-Pushpasis</div><div>=
<br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">O=
n Fri, Jan 20, 2017 at 4:49 PM, Benoit Claise <span dir=3D"ltr">&lt;<a href=
=3D"mailto:bclaise@cisco.com" target=3D"_blank">bclaise@cisco.com</a>&gt;</=
span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8e=
x;border-left:1px #ccc solid;padding-left:1ex">Benoit Claise has entered th=
e following ballot position for<br>
draft-ietf-rtgwg-rlfa-node-<wbr>protection-12: No Objection<br>
<br>
When responding, please keep the subject line intact and reply to all<br>
email addresses included in the To and CC lines. (Feel free to cut this<br>
introductory paragraph, however.)<br>
<br>
<br>
Please refer to <a href=3D"https://www.ietf.org/iesg/statement/discuss-crit=
eria.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/iesg/<=
wbr>statement/discuss-criteria.<wbr>html</a><br>
for more information about IESG DISCUSS and COMMENT positions.<br>
<br>
<br>
The document, along with other ballot positions, can be found here:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-prot=
ection/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/=
<wbr>doc/draft-ietf-rtgwg-rlfa-<wbr>node-protection/</a><br>
<br>
<br>
There are no remarks associated with this position.<br>
<br>
<br>
<br>
<br>
</blockquote></div><br></div>

--001a114e62fcc61f4b05468503cb--


From nobody Fri Jan 20 13:16:13 2017
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Subject: Protocol Action: 'Remote-LFA Node Protection and Manageability' to Proposed Standard (draft-ietf-rtgwg-rlfa-node-protection-13.txt)
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The IESG has approved the following document:
- 'Remote-LFA Node Protection and Manageability'
  (draft-ietf-rtgwg-rlfa-node-protection-13.txt) as Proposed Standard

This document is the product of the Routing Area Working Group.

The IESG contact persons are Alvaro Retana, Alia Atlas and Deborah
Brungard.

A URL of this Internet Draft is:
https://datatracker.ietf.org/doc/draft-ietf-rtgwg-rlfa-node-protection/





Technical Summary

   The loop-free alternates computed following the current Remote-LFA
   specification guarantees only link-protection.  The resulting Remote-
   LFA nexthops (also called PQ-nodes), may not guarantee node-
   protection for all destinations being protected by it.

   This document describes an extension to the Remote Loop-Free based IP
   fast reroute mechanisms described in RFC7490, that describes
   procedures for determining if a given PQ-node provides node-
   protection for a specific destination or not.  The document also
   shows how the same procedure can be utilised for collection of
   complete characteristics for alternate paths.  Knowledge about the
   characteristics of all alternate path is precursory to apply operator
   defined policy for eliminating paths not fitting constraints.

Working Group Summary

There was strong concensus for this document by the working group, the routing 
directorate review by Mike Shand and comments by Levente Csikor helped resolve 
some earlier issues with the drafts readability.

Document Quality

The document is of high quality and there is an existing implementation that has been deployed.

Personnel

Jon Mitchell, Document Shepherd
Alia Atlas, Responsible Area Director


From nobody Sun Jan 22 10:26:23 2017
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Sun, 22 Jan 2017 10:26:13 -0800
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Subject: Re: [OSPF] Routing in DC RTGWG interim - updated
To: "Acee Lindem (acee)" <acee@cisco.com>
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Dear All,
RTGWG chairs mentioned only 01/25 but the event stretches it over two days.
Got confused.

Regards, Greg

On Mon, Jan 16, 2017 at 7:35 AM, Acee Lindem (acee) <acee@cisco.com> wrote:

> Hi David,
> The meeting is 12:00 PM - 2:30 PM EST.
> Thanks,
> Acee
>
> On 1/16/17, 6:42 AM, "OSPF on behalf of Black, David"
> <ospf-bounces@ietf.org on behalf of David.Black@dell.com> wrote:
>
> >When: Jan 25, 2017 (all day)
> >--
> >_____________________________________________
> >From: rtgwg [mailto:rtgwg-bounces@ietf.org] On Behalf Of Jeff Tantsura
> >Sent: Tuesday, January 10, 2017 4:19 PM
> >To: RTGWG
> >Cc: Isis-wg; 'rtgwg-chairs'; Idr; ospf@ietf.org
> >Subject: Re: Routing in DC RTGWG interim - updated
> >
> >
> >Hi,
> >
> >Please find updated agenda for 25th=C2=B9s interim
> >
> >Presenters:
> >Problem statements:
> >Petr Lapukhov - FB
> >Dmitry Afanasiev - YANDEX
> >Russ White/ Shawn Zandi - LinkedIn
> >
> >Solutions proposed:
> >Keyur Patel, Arrcus  - Shortest Path Routing Extensions for BGP Protocol=
,
> >draft-keyupate-idr-bgp-spf
> >Naiming Shen , Cisco  - IS-IS Routing for Spine-Leaf Topology,
> >draft-shen-isis-spine-leaf-ext
> >Tony Przygienda, Juniper - RIFT: Routing in Fat Trees,
> >draft-przygienda-rift  (draft to be published later this week)
> >Bhumip Khasnabish, ZTE - Generic Fault-avoidance Routing Protocol for
> >Data Center Networks, draft-sl-rtgwg-far-dcn
> >
> >
> >Thanks!
> >
> >Cheers,
> >Jeff & Chris
> >
> >
> >From: Jeff Tantsura
> ><jefftant.ietf@gmail.com<mailto:jefftant.ietf@gmail.com>>
> >Date: Saturday, December 17, 2016 at 06:10
> >To: RTGWG <rtgwg@ietf.org<mailto:rtgwg@ietf.org>>
> >Cc: 'rtgwg-chairs'
> ><rtgwg-chairs@tools.ietf.org<mailto:rtgwg-chairs@tools.ietf.org>>, Idr
> ><idr-bounces@ietf.org<mailto:idr-bounces@ietf.org>>, Isis-wg
> ><isis-wg-bounces@ietf.org<mailto:isis-wg-bounces@ietf.org>>,
> >"ospf@ietf.org<mailto:ospf@ietf.org>"
> ><ospf@ietf.org<mailto:ospf@ietf.org>>
> >Subject: Routing in DC RTGWG interim
> >
> >Hi Routing Protocols wg=C2=B9s,
> >
> >There have been number of recently published drafts and discussions on
> >the topic
> >As discussed in Seoul, we=C2=B9d like to have a RTGWG interim to provide=
 the
> >platform for both, draft authors and implementers to talk about what and
> >why.
> >
> >The date we have set is January 25, 9:00AM PST.
> >We will be reaching out to you.
> >
> >Based on our preliminary discussion in Seoul we are planning to have the
> >following presenters:
> >
> >drafts:
> >draft-keyupate-idr-bgp-spf =C2=AD Keyur to present
> >draft-shen-isis-spine-leaf-ext =C2=AD Naiming?
> >draft-sl-rtgwg-far-dcn -?
> >Tony P?
> >
> >DC network designers:
> >LinkedIn =C2=AD Shawn Z./Russ
> >Yandex - Dmitry Afanasiev
> >
> >More to be announced
> >
> >Thanks,
> >Jeff & Chris
> >_______________________________________________
> >OSPF mailing list
> >OSPF@ietf.org
> >https://www.ietf.org/mailman/listinfo/ospf
>
> _______________________________________________
> OSPF mailing list
> OSPF@ietf.org
> https://www.ietf.org/mailman/listinfo/ospf
>

--001a1141b0f2a0e29d0546b304f9
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<div dir=3D"ltr">Dear All,<div>RTGWG chairs mentioned only 01/25 but the ev=
ent stretches it over two days. Got confused.</div><div><br></div><div>Rega=
rds, Greg</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quo=
te">On Mon, Jan 16, 2017 at 7:35 AM, Acee Lindem (acee) <span dir=3D"ltr">&=
lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@cisco.com</a>&g=
t;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0=
 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi David,<br>
The meeting is 12:00 PM - 2:30 PM EST.<br>
Thanks,<br>
Acee<br>
<br>
On 1/16/17, 6:42 AM, &quot;OSPF on behalf of Black, David&quot;<br>
<div><div class=3D"h5">&lt;<a href=3D"mailto:ospf-bounces@ietf.org">ospf-bo=
unces@ietf.org</a> on behalf of <a href=3D"mailto:David.Black@dell.com">Dav=
id.Black@dell.com</a>&gt; wrote:<br>
<br>
&gt;When: Jan 25, 2017 (all day)<br>
&gt;--<br>
&gt;_____________________________<wbr>________________<br>
&gt;From: rtgwg [mailto:<a href=3D"mailto:rtgwg-bounces@ietf.org">rtgwg-bou=
nces@ietf.org</a><wbr>] On Behalf Of Jeff Tantsura<br>
&gt;Sent: Tuesday, January 10, 2017 4:19 PM<br>
&gt;To: RTGWG<br>
&gt;Cc: Isis-wg; &#39;rtgwg-chairs&#39;; Idr; <a href=3D"mailto:ospf@ietf.o=
rg">ospf@ietf.org</a><br>
&gt;Subject: Re: Routing in DC RTGWG interim - updated<br>
&gt;<br>
&gt;<br>
&gt;Hi,<br>
&gt;<br>
&gt;Please find updated agenda for 25th=C2=B9s interim<br>
&gt;<br>
&gt;Presenters:<br>
&gt;Problem statements:<br>
&gt;Petr Lapukhov - FB<br>
&gt;Dmitry Afanasiev - YANDEX<br>
&gt;Russ White/ Shawn Zandi - LinkedIn<br>
&gt;<br>
&gt;Solutions proposed:<br>
&gt;Keyur Patel, Arrcus=C2=A0 - Shortest Path Routing Extensions for BGP Pr=
otocol,<br>
&gt;draft-keyupate-idr-bgp-spf<br>
&gt;Naiming Shen , Cisco=C2=A0 - IS-IS Routing for Spine-Leaf Topology,<br>
&gt;draft-shen-isis-spine-leaf-<wbr>ext<br>
&gt;Tony Przygienda, Juniper - RIFT: Routing in Fat Trees,<br>
&gt;draft-przygienda-rift=C2=A0 (draft to be published later this week)<br>
&gt;Bhumip Khasnabish, ZTE - Generic Fault-avoidance Routing Protocol for<b=
r>
&gt;Data Center Networks, draft-sl-rtgwg-far-dcn<br>
&gt;<br>
&gt;<br>
&gt;Thanks!<br>
&gt;<br>
&gt;Cheers,<br>
&gt;Jeff &amp; Chris<br>
&gt;<br>
&gt;<br>
&gt;From: Jeff Tantsura<br>
&gt;&lt;<a href=3D"mailto:jefftant.ietf@gmail.com">jefftant.ietf@gmail.com<=
/a>&lt;<wbr>mailto:<a href=3D"mailto:jefftant.ietf@gmail.com">jefftant.ietf=
@gmail.com</a><wbr>&gt;&gt;<br>
&gt;Date: Saturday, December 17, 2016 at 06:10<br>
&gt;To: RTGWG &lt;<a href=3D"mailto:rtgwg@ietf.org">rtgwg@ietf.org</a>&lt;m=
ailto:<a href=3D"mailto:rtgwg@ietf.org">rtgwg@<wbr>ietf.org</a>&gt;&gt;<br>
&gt;Cc: &#39;rtgwg-chairs&#39;<br>
&gt;&lt;<a href=3D"mailto:rtgwg-chairs@tools.ietf.org">rtgwg-chairs@tools.i=
etf.org</a>&lt;<wbr>mailto:<a href=3D"mailto:rtgwg-chairs@tools.ietf.org">r=
tgwg-chairs@tools.<wbr>ietf.org</a>&gt;&gt;, Idr<br>
&gt;&lt;<a href=3D"mailto:idr-bounces@ietf.org">idr-bounces@ietf.org</a>&lt=
;mailto:<a href=3D"mailto:idr-bounces@ietf.org"><wbr>idr-bounces@ietf.org</=
a>&gt;&gt;, Isis-wg<br>
&gt;&lt;<a href=3D"mailto:isis-wg-bounces@ietf.org">isis-wg-bounces@ietf.or=
g</a>&lt;<wbr>mailto:<a href=3D"mailto:isis-wg-bounces@ietf.org">isis-wg-bo=
unces@ietf.<wbr>org</a>&gt;&gt;,<br>
&gt;&quot;<a href=3D"mailto:ospf@ietf.org">ospf@ietf.org</a>&lt;mailto:<a h=
ref=3D"mailto:ospf@ietf.org">ospf@<wbr>ietf.org</a>&gt;&quot;<br>
&gt;&lt;<a href=3D"mailto:ospf@ietf.org">ospf@ietf.org</a>&lt;mailto:<a hre=
f=3D"mailto:ospf@ietf.org">ospf@<wbr>ietf.org</a>&gt;&gt;<br>
&gt;Subject: Routing in DC RTGWG interim<br>
&gt;<br>
&gt;Hi Routing Protocols wg=C2=B9s,<br>
&gt;<br>
&gt;There have been number of recently published drafts and discussions on<=
br>
&gt;the topic<br>
&gt;As discussed in Seoul, we=C2=B9d like to have a RTGWG interim to provid=
e the<br>
&gt;platform for both, draft authors and implementers to talk about what an=
d<br>
&gt;why.<br>
&gt;<br>
&gt;The date we have set is January 25, 9:00AM PST.<br>
&gt;We will be reaching out to you.<br>
&gt;<br>
&gt;Based on our preliminary discussion in Seoul we are planning to have th=
e<br>
&gt;following presenters:<br>
&gt;<br>
&gt;drafts:<br>
&gt;draft-keyupate-idr-bgp-spf =C2=AD Keyur to present<br>
&gt;draft-shen-isis-spine-leaf-<wbr>ext =C2=AD Naiming?<br>
&gt;draft-sl-rtgwg-far-dcn -?<br>
&gt;Tony P?<br>
&gt;<br>
&gt;DC network designers:<br>
&gt;LinkedIn =C2=AD Shawn Z./Russ<br>
&gt;Yandex - Dmitry Afanasiev<br>
&gt;<br>
&gt;More to be announced<br>
&gt;<br>
&gt;Thanks,<br>
&gt;Jeff &amp; Chris<br>
</div></div>&gt;_____________________________<wbr>__________________<br>
&gt;OSPF mailing list<br>
&gt;<a href=3D"mailto:OSPF@ietf.org">OSPF@ietf.org</a><br>
&gt;<a href=3D"https://www.ietf.org/mailman/listinfo/ospf" rel=3D"noreferre=
r" target=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/ospf</a><br=
>
<br>
______________________________<wbr>_________________<br>
OSPF mailing list<br>
<a href=3D"mailto:OSPF@ietf.org">OSPF@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ospf" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/ospf</a><br>
</blockquote></div><br></div>

--001a1141b0f2a0e29d0546b304f9--


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Date: Tue, 24 Jan 2017 15:32:37 -0800
Subject: Re: Routing in DC RTGWG interim - updated
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: RTGWG <rtgwg@ietf.org>
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Hi,

=20

Agenda and webex details for the upcoming interim have been posted at https=
://datatracker.ietf.org/meeting/interim-2017-rtgwg-01/agenda/rtgwg/

Presentations are available (partially) at https://datatracker.ietf.org/mee=
ting/interim-2017-rtgwg-01/session/rtgwg

=20

Looking forward to seeing you all at the interim, coming Wednesday, January=
 25 at 9:00AM PST.

=20

Cheers,

Jeff and Chris

=20

=20

From: Jeff Tantsura <jefftant.ietf@gmail.com>
Date: Tuesday, January 10, 2017 at 13:19
To: RTGWG <rtgwg@ietf.org>
Cc: 'rtgwg-chairs' <rtgwg-chairs@tools.ietf.org>, Idr <idr-bounces@ietf.org=
>, Isis-wg <isis-wg-bounces@ietf.org>, "ospf@ietf.org" <ospf@ietf.org>
Subject: Re: Routing in DC RTGWG interim - updated

=20

Hi,

=20

Please find updated agenda for 25th=E2=80=99s interim

=20

Presenters:

Problem statements:

Petr Lapukhov - FB

Dmitry Afanasiev - YANDEX

Russ White/ Shawn Zandi - LinkedIn

=20

Solutions proposed:

Keyur Patel, Arrcus  - Shortest Path Routing Extensions for BGP Protocol, d=
raft-keyupate-idr-bgp-spf

Naiming Shen , Cisco  - IS-IS Routing for Spine-Leaf Topology, draft-shen-i=
sis-spine-leaf-ext

Tony Przygienda, Juniper - RIFT: Routing in Fat Trees, draft-przygienda-rif=
t  (draft to be published later this week)

Bhumip Khasnabish, ZTE - Generic Fault-avoidance Routing Protocol for Data =
Center Networks, draft-sl-rtgwg-far-dcn

=20

=20

Thanks!

=20

Cheers,

Jeff & Chris

=20

=20

From: Jeff Tantsura <jefftant.ietf@gmail.com>
Date: Saturday, December 17, 2016 at 06:10
To: RTGWG <rtgwg@ietf.org>
Cc: 'rtgwg-chairs' <rtgwg-chairs@tools.ietf.org>, Idr <idr-bounces@ietf.org=
>, Isis-wg <isis-wg-bounces@ietf.org>, "ospf@ietf.org" <ospf@ietf.org>
Subject: Routing in DC RTGWG interim

=20

Hi Routing Protocols wg=E2=80=99s,

=20

There have been number of recently published drafts and discussions on the =
topic

As discussed in Seoul, we=E2=80=99d like to have a RTGWG interim to provide the p=
latform for both, draft authors and implementers to talk about what and why.

=20

The date we have set is January 25, 9:00AM PST.

We will be reaching out to you.

=20

Based on our preliminary discussion in Seoul we are planning to have the fo=
llowing presenters:

=20

drafts:

draft-keyupate-idr-bgp-spf =E2=80=93 Keyur to present

draft-shen-isis-spine-leaf-ext =E2=80=93 Naiming?

draft-sl-rtgwg-far-dcn -?

Tony P?

=20

DC network designers:

LinkedIn =E2=80=93 Shawn Z./Russ

Yandex - Dmitry Afanasiev

=20

More to be announced

=20

Thanks,

Jeff & Chris

=20


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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:11.0p=
t'>Hi,<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt=
'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0=
pt'>Agenda and webex details for the upcoming interim have been posted at <a=
 href=3D"https://datatracker.ietf.org/meeting/interim-2017-rtgwg-01/agenda/rtg=
wg/">https://datatracker.ietf.org/meeting/interim-2017-rtgwg-01/agenda/rtgwg=
/</a><o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'=
>Presentations are available (partially) at <a href=3D"https://datatracker.iet=
f.org/meeting/interim-2017-rtgwg-01/session/rtgwg">https://datatracker.ietf.=
org/meeting/interim-2017-rtgwg-01/session/rtgwg</a><o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></p><=
p class=3DMsoNormal><span style=3D'font-size:11.0pt'>Looking forward to seeing y=
ou all at the interim, coming Wednesday, January 25 at 9:00AM PST.<o:p></o:p=
></span></p><div><p class=3DMsoNormal><span style=3D'font-size:10.5pt;color:blac=
k'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:10.=
5pt;color:black'>Cheers,<o:p></o:p></span></p><p class=3DMsoNormal><span style=
=3D'font-size:10.5pt;color:black'>Jeff and Chris<o:p></o:p></span></p></div><p=
 class=3DMsoNormal><span style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></p>=
<p class=3DMsoNormal><span style=3D'font-size:11.0pt'><o:p>&nbsp;</o:p></span></=
p><div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0=
in 0in'><p class=3DMsoNormal><b><span style=3D'color:black'>From: </span></b><sp=
an style=3D'color:black'>Jeff Tantsura &lt;jefftant.ietf@gmail.com&gt;<br><b>D=
ate: </b>Tuesday, January 10, 2017 at 13:19<br><b>To: </b>RTGWG &lt;rtgwg@ie=
tf.org&gt;<br><b>Cc: </b>'rtgwg-chairs' &lt;rtgwg-chairs@tools.ietf.org&gt;,=
 Idr &lt;idr-bounces@ietf.org&gt;, Isis-wg &lt;isis-wg-bounces@ietf.org&gt;,=
 &quot;ospf@ietf.org&quot; &lt;ospf@ietf.org&gt;<br><b>Subject: </b>Re: Rout=
ing in DC RTGWG interim - updated<o:p></o:p></span></p></div><div><p class=3DM=
soNormal><span style=3D'font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span=
></p></div><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>Hi,</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'>Please find up=
dated agenda for 25<sup>th</sup>&#8217;s interim</span><o:p></o:p></p><p cla=
ss=3DMsoNormal><span style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></p><p c=
lass=3DMsoNormal><span style=3D'font-size:11.0pt'>Presenters:</span><o:p></o:p><=
/p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>Problem statements:</sp=
an><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>Petr Lap=
ukhov - FB</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11=
.0pt'>Dmitry Afanasiev - YANDEX</span><o:p></o:p></p><p class=3DMsoNormal><spa=
n style=3D'font-size:11.0pt'>Russ White/ Shawn Zandi - LinkedIn</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'>Solutions propose=
d:</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>Ke=
yur Patel, Arrcus &nbsp;- Shortest Path Routing Extensions for BGP Protocol,=
 draft-keyupate-idr-bgp-spf</span><o:p></o:p></p><p class=3DMsoNormal><span st=
yle=3D'font-size:11.0pt'>Naiming Shen , Cisco &nbsp;- IS-IS Routing for Spine-=
Leaf Topology, draft-shen-isis-spine-leaf-ext</span><o:p></o:p></p><p class=3D=
MsoNormal><span style=3D'font-size:11.0pt'>Tony Przygienda, Juniper - RIFT: Ro=
uting in Fat Trees, draft-przygienda-rift &nbsp;(draft to be published later=
 this week)</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:1=
1.0pt'>Bhumip Khasnabish, ZTE - Generic Fault-avoidance Routing Protocol for=
 Data Center Networks, draft-sl-rtgwg-far-dcn</span><o:p></o:p></p><p class=3D=
MsoNormal><span style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></p><p clas=
s=3DMsoNormal><span style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></p><p cl=
ass=3DMsoNormal><span style=3D'font-size:11.0pt'>Thanks!</span><o:p></o:p></p><d=
iv><p class=3DMsoNormal><span style=3D'font-size:10.5pt;color:black'>&nbsp;</spa=
n><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:10.5pt;color:blac=
k'>Cheers,</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:10=
.5pt;color:black'>Jeff &amp; Chris</span><o:p></o:p></p></div><p class=3DMsoNo=
rmal><span style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></p><p class=3DMso=
Normal><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 c=
lass=3DMsoNormal><b><span style=3D'color:black'>From: </span></b><span style=3D'co=
lor:black'>Jeff Tantsura &lt;jefftant.ietf@gmail.com&gt;<br><b>Date: </b>Sat=
urday, December 17, 2016 at 06:10<br><b>To: </b>RTGWG &lt;rtgwg@ietf.org&gt;=
<br><b>Cc: </b>'rtgwg-chairs' &lt;rtgwg-chairs@tools.ietf.org&gt;, Idr &lt;i=
dr-bounces@ietf.org&gt;, Isis-wg &lt;isis-wg-bounces@ietf.org&gt;, &quot;osp=
f@ietf.org&quot; &lt;ospf@ietf.org&gt;<br><b>Subject: </b>Routing in DC RTGW=
G interim</span><o:p></o:p></p></div><div><p class=3DMsoNormal><span style=3D'fo=
nt-family:"Times New Roman"'>&nbsp;</span><o:p></o:p></p></div><p class=3DMsoN=
ormal><span style=3D'font-size:11.0pt'>Hi Routing Protocols wg&#8217;s,</span>=
<o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>&nbsp;</spa=
n><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>There hav=
e been number of recently published drafts and discussions on the topic</spa=
n><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>As discus=
sed in Seoul, we&#8217;d like to have a RTGWG interim to provide the platfor=
m for both, draft authors and implementers to talk about what and why.</span=
><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>&nbsp;</sp=
an><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>The date=
 we have set is January 25, 9:00AM PST.</span><o:p></o:p></p><p class=3DMsoNor=
mal><span style=3D'font-size:11.0pt'>We will be reaching out to you.</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'>Based on our=
 preliminary discussion in Seoul we are planning to have the following prese=
nters:</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:11.0=
pt'>drafts:</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:1=
1.0pt'>draft-keyupate-idr-bgp-spf &#8211; Keyur to present</span><o:p></o:p>=
</p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>draft-shen-isis-spine-=
leaf-ext &#8211; Naiming?</span><o:p></o:p></p><p class=3DMsoNormal><span styl=
e=3D'font-size:11.0pt'>draft-sl-rtgwg-far-dcn -?</span><o:p></o:p></p><p class=
=3DMsoNormal><span style=3D'font-size:11.0pt'>Tony P?</span><o:p></o:p></p><p cl=
ass=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'>DC network designers:</span><=
o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt'>LinkedIn &#8=
211; Shawn Z./Russ</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font=
-size:11.0pt'>Yandex - Dmitry Afanasiev</span><o:p></o:p></p><p class=3DMsoNor=
mal><span style=3D'font-size:11.0pt'>&nbsp;</span><o:p></o:p></p><p class=3DMsoN=
ormal><span style=3D'font-size:11.0pt'>More to be announced</span><o:p></o:p><=
/p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;color:black'>&nbsp;</spa=
n><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;color:blac=
k'>Thanks,</span><o:p></o:p></p><p class=3DMsoNormal><span style=3D'font-size:11=
.0pt;color:black'>Jeff &amp; Chris</span><o:p></o:p></p><p class=3DMsoNormal>&=
nbsp;<o:p></o:p></p></div></body></html>

--B_3568116758_1470679604--



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From: Chris Bowers <cbowers@juniper.net>
To: RTGWG <rtgwg@ietf.org>
Subject: RE: Routing in DC RTGWG interim - updated
Thread-Topic: Routing in DC RTGWG interim - updated
Thread-Index: AQHSa4c1re2AAQYQXEGC1SmnceUgt6FIXTyAgAEaZmA=
Date: Wed, 25 Jan 2017 16:27:08 +0000
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From: Uma Chunduri <uma.chunduri@huawei.com>
To: Chris Bowers <cbowers@juniper.net>, RTGWG <rtgwg@ietf.org>
Subject: RE: Routing in DC RTGWG interim - updated
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Subject: Re: Routing in DC RTGWG interim - updated
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/* Trimming the lists a bit */

Hi Uma,

Well I would actually start with common understanding and agreement as to
what's wrong with RFC7938 based deployments in the first place ? Is there
some document or draft which describes it well ?

Is BGP local auto discovery an issue ? Then let's solve it .. it is simple
problem. Some already solved it with auto BGP peering to link local
addresses.

To perhaps restate Keyur's question ... Do we all agree with the
requirements as presented by Tony P which are triggering RIFT ?


[image: Inline image 1]

Cheers,
R.



On Wed, Jan 25, 2017 at 8:26 PM, Uma Chunduri <uma.chunduri@huawei.com>
wrote:

> One quick suggestion for the solution presenters:
>
>
>
> Perhaps it=E2=80=99s good to have a section in respective documents how t=
he
> proposal can bring operational simplicity (if at all)  than existing
> deployments (say than RFC 7938 based..).
>
> --
>
> Uma C.
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small"><fo=
nt face=3D"monospace, monospace">/* Trimming the lists a bit */</font></div=
><div class=3D"gmail_default" style=3D"font-size:small"><font face=3D"monos=
pace, monospace"><br></font></div><div class=3D"gmail_default" style=3D"fon=
t-size:small"><font face=3D"monospace, monospace">Hi Uma,<br></font></div><=
div class=3D"gmail_default" style=3D"font-size:small"><font face=3D"monospa=
ce, monospace"><br></font></div><div class=3D"gmail_default" style=3D"font-=
size:small"><font face=3D"monospace, monospace">Well I would actually start=
 with common understanding and agreement as to what&#39;s wrong with RFC793=
8 based deployments in the first place ? Is there some document or draft wh=
ich describes it well ?=C2=A0</font></div><div class=3D"gmail_default" styl=
e=3D"font-size:small"><font face=3D"monospace, monospace"><br></font></div>=
<div class=3D"gmail_default" style=3D"font-size:small"><font face=3D"monosp=
ace, monospace">Is BGP local auto discovery an issue ? Then let&#39;s solve=
 it .. it is simple problem. Some already solved it with auto BGP peering t=
o link local addresses.=C2=A0</font></div><div class=3D"gmail_default" styl=
e=3D"font-size:small"><font face=3D"monospace, monospace"><br></font></div>=
<div class=3D"gmail_default" style=3D"font-size:small"><font face=3D"monosp=
ace, monospace">To perhaps restate Keyur&#39;s question ... Do we all agree=
 with the requirements as presented by Tony P which are triggering RIFT ?=
=C2=A0</font></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_default" style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small"><img src=3D"cid:ii_159d7220650e0cf6" alt=3D"Inline ima=
ge 1" width=3D"549" height=3D"325"><br></div><div class=3D"gmail_default" s=
tyle=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">Cheers,<br>R.</div><div class=3D"gmail_default" style=3D"=
font-family:arial,helvetica,sans-serif;font-size:small"><br></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_extra"><br><div class=3D"gmail_quot=
e">On Wed, Jan 25, 2017 at 8:26 PM, Uma Chunduri <span dir=3D"ltr">&lt;<a h=
ref=3D"mailto:uma.chunduri@huawei.com" target=3D"_blank">uma.chunduri@huawe=
i.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"m=
argin: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_-7952574399569957290WordSection1">
<p class=3D"MsoNormal"><a name=3D"m_-7952574399569957290__MailEndCompose"><=
span style=3D"font-size:11.0pt;color:#1f497d">One quick suggestion for the =
solution presenters:<u></u><u></u></span></a></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:#1f497d"><u></=
u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:#1f497d">Perha=
ps it=E2=80=99s good to have a section in respective documents how the prop=
osal can bring operational simplicity (if at all) =C2=A0than existing deplo=
yments (say than RFC 7938 based..).<u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:#1f497d">--</s=
pan><span style=3D"font-size:11.0pt;font-family:&quot;Freestyle Script&quot=
;;color:#1f497d"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;color:#1f497d">Uma C=
.</span></p></div></div></div></blockquote><div><br></div><div><br></div></=
div></div></div>

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From: Uma Chunduri <uma.chunduri@huawei.com>
To: Robert Raszuk <robert@raszuk.net>
Subject: RE: Routing in DC RTGWG interim - updated
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Subject: Re: Routing in DC RTGWG interim - updated
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--001a1135c238af25a30546f1fe37
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> I am not sure this is the central issue ..but for SPF based approaches to
> have the topology view this could be one part of it (and hence in bgp-spf=
,
>  usage of BGP-LS to advertise the TCP peering as a Link NLRI with new TLV=
s
> distinguishing itself from IGP adj representation).
>

=E2=80=8BWell on BGP SPF proposal I see number of advantage .. but very hon=
estly I
do not buy into how it is being "sold" here.

If folks talking about it would say ... our proposal is to run BGP SPF =E2=
=80=8Bon
controller only to optimize and augment things while you still run normal
eBGP in CLOS I would be perhaps very interested in seriously supporting
this work.

But if I hear that this is to replace eBGP and push routes left and right
"centrally computed" this goes way over the max level of gain vs
drawback/risk level one is to accept.

Best,
R.

--001a1135c238af25a30546f1fe37
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"><br></div><div class=3D"gmail_extra"><d=
iv class=3D"gmail_quote"><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_5841435114451493869WordSect=
ion1"><div><div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">I am not sure this is the central iss=
ue ..but for SPF based approaches to have the topology view this could be o=
ne part of it (and hence in bgp-spf,
 =C2=A0usage of BGP-LS to advertise the TCP peering as a Link NLRI with new=
 TLVs distinguishing itself from IGP adj representation).</span></p></div><=
/div></div></div></blockquote><div><br></div><div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">=E2=80=
=8BWell on BGP SPF proposal I see number of advantage .. but very honestly =
I do not buy into how it is being &quot;sold&quot; here.=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">If folks talking about it would sa=
y ... our proposal is to run BGP SPF =E2=80=8Bon controller only to optimiz=
e and augment things while you still run normal eBGP in CLOS I would be per=
haps very interested in seriously supporting this work.=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">But if I hear that this is to repla=
ce eBGP and push routes left and right &quot;centrally computed&quot; this =
goes way over the max level of gain vs drawback/risk level one is to accept=
.</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sa=
ns-serif;font-size:small"><br></div><div class=3D"gmail_default" style=3D"f=
ont-family:arial,helvetica,sans-serif;font-size:small">Best,</div><div clas=
s=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-si=
ze:small">R.</div><br></div></div></div></div>

--001a1135c238af25a30546f1fe37--


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From: Uma Chunduri <uma.chunduri@huawei.com>
To: Robert Raszuk <robert@raszuk.net>
Subject: RE: Routing in DC RTGWG interim - updated
Thread-Topic: Routing in DC RTGWG interim - updated
Thread-Index: AQHSdptJTpR90by9I0WxuRkP7Y4pHaFJ6KQA//+rH2CAAIrOgP//jZiAgACSSwD//3uvoA==
Date: Wed, 25 Jan 2017 21:46:41 +0000
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Robert Raszuk <robert@raszuk.net>, Uma Chunduri <uma.chunduri@huawei.com>
Subject: Re: Routing in DC RTGWG interim - updated
Thread-Topic: Routing in DC RTGWG interim - updated
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From: Robert Raszuk <robert@raszuk.net>
Date: Wed, 25 Jan 2017 23:20:26 +0100
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Subject: Re: Routing in DC RTGWG interim - updated
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--001a11401d2ec1ea5d0546f2a367
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Hi AC,

My point was to indicate that running SPF regardless if it happens in
central controller or at each switch would be perhaps fine as a add-on not
as replacement of basic 7938.

As simple as this. Please think about it :) IMHO such positioning is a
smoothest way to move forward. And if someone later thinks that BGP-SPF is
cool and works great they can at their will decommission vanilla 7938. But
this should be an option to the user and BGP-SPF architecture should be
written from day one with a notion of augmentation not a clean slate
proposal.

Cheers,
R.



On Wed, Jan 25, 2017 at 11:09 PM, Acee Lindem (acee) <acee@cisco.com> wrote=
:

> Hi Robert,
>
> From: rtgwg <rtgwg-bounces@ietf.org> on behalf of Robert Raszuk <
> robert@raszuk.net>
> Date: Wednesday, January 25, 2017 at 4:34 PM
> To: Uma Chunduri <uma.chunduri@huawei.com>
> Cc: Routing WG <rtgwg@ietf.org>
> Subject: Re: Routing in DC RTGWG interim - updated
>
>
> I am not sure this is the central issue ..but for SPF based approaches to
>> have the topology view this could be one part of it (and hence in bgp-sp=
f,
>>  usage of BGP-LS to advertise the TCP peering as a Link NLRI with new TL=
Vs
>> distinguishing itself from IGP adj representation).
>>
>
> =E2=80=8BWell on BGP SPF proposal I see number of advantage .. but very h=
onestly I
> do not buy into how it is being "sold" here.
>
> If folks talking about it would say ... our proposal is to run BGP SPF =
=E2=80=8Bon
> controller only to optimize and augment things while you still run normal
> eBGP in CLOS I would be perhaps very interested in seriously supporting
> this work.
>
> But if I hear that this is to replace eBGP and push routes left and right
> "centrally computed" this goes way over the max level of gain vs
> drawback/risk level one is to accept.
>
>
> We are really not intending the controller deployment to follow either of
> the above. The SPF route computation is distributed in each BGP switch an=
d
> hierarchal reflectors are used to allow for a spare mesh of BGP sessions.
> This overcomes the many copies issue that Tony alluded to when BGP is use=
d
> for <key, value> distribution.  The controller or route reflectors
> (dependent on the use case) could subset the scoping on the BGP-LS
> information or inject NLRI to influence the SPF.
>
> My fellow authors can chime in as well.
>
> Thanks,
> Acee
>
>
>
>
> Best,
> R.
>
>

--001a11401d2ec1ea5d0546f2a367
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 AC,</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">My point was to indicate that running SPF regardless i=
f it happens in central controller or at each switch would be perhaps fine =
as a add-on not as replacement of basic 7938.=C2=A0</div><div class=3D"gmai=
l_default" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"=
><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetic=
a,sans-serif;font-size:small">As simple as this. Please think about it :) I=
MHO such positioning is a smoothest way to move forward. And if someone lat=
er thinks that BGP-SPF is cool and works great they can at their will decom=
mission vanilla 7938. But this should be an option to the user and BGP-SPF =
architecture should be written from day one with a notion of augmentation n=
ot a clean slate proposal.</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">Cheers,</div><div class=3D"gmail_default" style=3D"font-family:arial,h=
elvetica,sans-serif;font-size:small">R.</div><div class=3D"gmail_default" s=
tyle=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></div></div><div class=3D"gmail_extra"><br><div class=
=3D"gmail_quote">On Wed, Jan 25, 2017 at 11:09 PM, Acee Lindem (acee) <span=
 dir=3D"ltr">&lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@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 style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-fam=
ily:Calibri,sans-serif">
<div>Hi Robert,</div>
<div><br>
</div>
<span id=3D"m_-8938529678649514472OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri;font-size:11pt;text-align:left;color:blac=
k;BORDER-BOTTOM:medium none;BORDER-LEFT:medium none;PADDING-BOTTOM:0in;PADD=
ING-LEFT:0in;PADDING-RIGHT:0in;BORDER-TOP:#b5c4df 1pt solid;BORDER-RIGHT:me=
dium none;PADDING-TOP:3pt">
<span style=3D"font-weight:bold">From: </span>rtgwg &lt;<a href=3D"mailto:r=
tgwg-bounces@ietf.org" target=3D"_blank">rtgwg-bounces@ietf.org</a>&gt; on =
behalf of Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D"=
_blank">robert@raszuk.net</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Wednesday, January 25, 2017 a=
t 4:34 PM<br>
<span style=3D"font-weight:bold">To: </span>Uma Chunduri &lt;<a href=3D"mai=
lto:uma.chunduri@huawei.com" target=3D"_blank">uma.chunduri@huawei.com</a>&=
gt;<br>
<span style=3D"font-weight:bold">Cc: </span>Routing WG &lt;<a href=3D"mailt=
o:rtgwg@ietf.org" target=3D"_blank">rtgwg@ietf.org</a>&gt;<span class=3D"">=
<br>
<span style=3D"font-weight:bold">Subject: </span>Re: Routing in DC RTGWG in=
terim - updated<br>
</span></div>
<div><br>
</div>
<blockquote id=3D"m_-8938529678649514472MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE"=
 style=3D"BORDER-LEFT:#b5c4df 5 solid;PADDING:0 0 0 5;MARGIN:0 0 0 5">
<div>
<div>
<div dir=3D"ltr">
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">
<br>
</div><span class=3D"">
<div class=3D"gmail_extra">
<div class=3D"gmail_quote">
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_-8938529678649514472m_5841435114451493869WordSection1">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">I am not sure this is the central iss=
ue ..but for SPF based approaches to have the topology view this could be o=
ne part of it (and hence in bgp-spf, =C2=A0usage of
 BGP-LS to advertise the TCP peering as a Link NLRI with new TLVs distingui=
shing itself from IGP adj representation).</span></p>
</div>
</div>
</div>
</div>
</blockquote>
<div><br>
</div>
<div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">
=E2=80=8BWell on BGP SPF proposal I see number of advantage .. but very hon=
estly I do not buy into how it is being &quot;sold&quot; here.=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-family:arial,helvetica,sans-seri=
f;font-size:small">
If folks talking about it would say ... our proposal is to run BGP SPF =E2=
=80=8Bon controller only to optimize and augment things while you still run=
 normal eBGP in CLOS I would be perhaps very interested in seriously suppor=
ting this work.=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-family:arial,helvetica,sans-seri=
f;font-size:small">
But if I hear that this is to replace eBGP and push routes left and right &=
quot;centrally computed&quot; this goes way over the max level of gain vs d=
rawback/risk level one is to accept.</div>
</div>
</div>
</div>
</span></div>
</div>
</div>
</blockquote>
</span>
<div><br>
</div>
<div>We are really not intending the controller deployment to follow either=
 of the above. The SPF route computation is distributed in each BGP switch =
and hierarchal reflectors are used to allow for a spare mesh of BGP session=
s. This overcomes the many copies
 issue that Tony alluded to when BGP is used for &lt;key, value&gt; distrib=
ution.=C2=A0 The controller or route reflectors (dependent on the use case)=
 could subset the scoping on the BGP-LS information or inject NLRI to influ=
ence the SPF.=C2=A0</div>
<div><br>
</div>
<div>My fellow authors can chime in as well.=C2=A0</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Acee=C2=A0</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<span id=3D"m_-8938529678649514472OLK_SRC_BODY_SECTION">
<blockquote id=3D"m_-8938529678649514472MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE"=
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<div>
<div>
<div dir=3D"ltr">
<div class=3D"gmail_extra">
<div class=3D"gmail_quote">
<div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
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<br>
</div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f;font-size:small">
Best,</div>
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
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R.</div>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</span>
</div>

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

--001a11401d2ec1ea5d0546f2a367--


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Date: Wed, 25 Jan 2017 14:45:58 -0800
Subject: Re: Routing in DC RTGWG interim - recording
From: Jeff Tantsura <jefftant.ietf@gmail.com>
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Hi ALL,

 

Please find the link to the recording of the interim.

https://ietf.webex.com/ietf/ldr.php?RCID=660f5960c9d92ce94108d9b31884fa76

 

Thanks,

Jeff


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Robert Raszuk <robert@raszuk.net>
Subject: Re: Routing in DC RTGWG interim - updated
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From: Robert Raszuk <robert@raszuk.net>
Date: Wed, 25 Jan 2017 23:51:40 +0100
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Subject: Re: Routing in DC RTGWG interim - updated
To: "Acee Lindem (acee)" <acee@cisco.com>
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--001a1135c238799ddd0546f313d8
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

> Great question!!! I want to assure the WG that Robert and I have had no
> prior collusion and he asked this independently=E2=80=A6
>

=E2=80=8BLOL .. Like the RTGWG would not know alreasy that I do not play su=
ch setup
games ???=E2=80=8B ;-) Come on AC !



> We have thought about that. The beauty of BGP SPF is that you can use it
> solely for the underlay and maintain the services (e.g., RFC 4364) in the
> overlay.
>
> Additionally, it is very easy to migrate only a portion of your data
> center to BGP SPF. Routers operating in both domains (BGP SPF and RFC 793=
8)
> can perform the interworking by advertising AF IPv4 unicast routes into t=
he
> BGP-SPF domain as BGP-LS Prefix NLRI and reachable BGP-SPF prefixes into
> the normal BGP IPv4 or IPv6 unicast domain as reachable NLRI.
>


=E2=80=8BThat's not what I am talking about ... I am talking of running bot=
h in
parallel not interworking at the boundary. Think outside of the box pls.

Just to translate to your world is like running ISIS and OSPF together if
for nothing else then for routing with OSPF and using ISIS only to compute
your LFAs (if really needed and OSPF does not support it yet on your boxes)
:) =E2=80=8B.

Best,
R.

--001a1135c238799ddd0546f313d8
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"><div=
>=C2=A0</div><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;color:rgb(0,0,0);font-size:14px;font-family:Calibri,sans-serif"><div>Gr=
eat question!!! I want to assure the WG that Robert and I have had no prior=
 collusion and he asked this independently=E2=80=A6=C2=A0<br></div></div></=
blockquote><div><br></div><div><div class=3D"gmail_default" style=3D"font-f=
amily:arial,helvetica,sans-serif;font-size:small">=E2=80=8BLOL .. Like the =
RTGWG would not know alreasy that I do not play such setup games ???=E2=80=
=8B ;-) Come on AC !</div></div><div><br></div><div>=C2=A0</div><blockquote=
 class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli=
d;padding-left:1ex"><div style=3D"word-wrap:break-word;color:rgb(0,0,0);fon=
t-size:14px;font-family:Calibri,sans-serif"><div>
</div>
<div>We have thought about that. The beauty of BGP SPF is that you can use =
it solely for the underlay and maintain the services (e.g., RFC 4364) in th=
e overlay.=C2=A0</div>
<div><br>
</div>
<div>Additionally, it is very easy to migrate only a portion of your data c=
enter to BGP SPF. Routers operating in both domains (BGP SPF and RFC 7938) =
can perform the interworking by advertising AF IPv4 unicast routes into the=
 BGP-SPF domain as BGP-LS Prefix
 NLRI and reachable BGP-SPF prefixes into the normal BGP IPv4 or IPv6 unica=
st domain as reachable NLRI.=C2=A0</div></div></blockquote><div><br></div><=
div><br></div><div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small">=E2=80=8BThat&#39;s not what I am tal=
king about ... I am talking of running both in parallel not interworking at=
 the boundary. Think outside of the box pls.</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">Just to translate to your world is like running ISIS=
 and OSPF together if for nothing else then for routing with OSPF and using=
 ISIS only to compute your LFAs (if really needed and OSPF does not support=
 it yet on your boxes) :) =E2=80=8B.=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">Best,</div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif;font-size:small">R.</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><br>=
</div><div><br></div><div>=C2=A0</div></div></div></div>

--001a1135c238799ddd0546f313d8--


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Robert Raszuk <robert@raszuk.net>
Subject: Re: Routing in DC RTGWG interim - updated
Thread-Topic: Routing in DC RTGWG interim - updated
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Date: Wed, 25 Jan 2017 22:57:42 +0000
Message-ID: <D4AE96B7.99EA6%acee@cisco.com>
References: <3DAD74E7-81E0-4A07-9560-994C462A720D@gmail.com> <2769D4FA-9E37-4CDE-99D5-932C2A2EA7E0@gmail.com> <MWHPR05MB282979AE979E9621CD79180BA9740@MWHPR05MB2829.namprd05.prod.outlook.com> <25B4902B1192E84696414485F57268540187EEB2@SJCEML703-CHM.china.huawei.com> <CA+b+ERmwCU-tz8J2gWMoAWUx8k2_w2dWugRZTpW9QdA6934koA@mail.gmail.com> <25B4902B1192E84696414485F57268540187EF0A@SJCEML703-CHM.china.huawei.com> <CA+b+ERn+LHR5u17D2xPwaEved4A-6bjD7_MqsrYSjTTn1UWpuQ@mail.gmail.com> <D4AE8A38.99E5B%acee@cisco.com> <CA+b+ER=cOwRmdCx6hAgMrOfVB5bQC1O8Fe-TvH=eg371-Cv9nw@mail.gmail.com> <D4AE9298.99E85%acee@cisco.com> <CA+b+ERnQz7_E0znynqu3kQWoTu428BaC_CMV7HmDjmC9j9j7iw@mail.gmail.com>
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From: "Van De Velde, Gunter (Nokia - BE)" <gunter.van_de_velde@nokia.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, Robert Raszuk <robert@raszuk.net>
Subject: Re: [ALU] Re: Routing in DC RTGWG interim - updated
Thread-Topic: [ALU] Re: Routing in DC RTGWG interim - updated
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From: "Xufeng Liu" <xufeng.liu.ietf@gmail.com>
To: "'Julien Meuric'" <julien.meuric@orange.com>, <rtgwg@ietf.org>, <draft-ietf-rtgwg-yang-rip.all@ietf.org>
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Subject: RE: Routing Directorate QA Review of draft-ietf-rtgwg-yang-rip
Date: Fri, 27 Jan 2017 15:35:14 -0500
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Hi Julien,

Thank you much for the review. An updated version =
https://tools.ietf.org/html/draft-ietf-rtgwg-yang-rip-03 has been posted =
to address most of these items.
Please let us know for any further issues.

Thanks,
- Xufeng


> -----Original Message-----
> From: Julien Meuric [mailto:julien.meuric@orange.com]
> Sent: Friday, January 13, 2017 11:40 AM
> To: rtgwg@ietf.org; draft-ietf-rtgwg-yang-rip.all@ietf.org
> Cc: rtg-dir@ietf.org
> Subject: Routing Directorate QA Review of draft-ietf-rtgwg-yang-rip
>=20
> Hello,
>=20
> I have been selected as the Routing Directorate QA reviewer for this =
draft. For
> more information about the Routing Directorate, please see
> =E2=82=AC=E2=80=B9http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir
>=20
> At this stage, the intend of the following is not to discuss the WG's =
decision
> about the I-D, but rather to help improving its content.
>=20
> Please not that I am not deep Yang expert, but RFC 6087 has provided =
me with
> valuable guidelines.
>=20
> _Summary_
> The Yang module specified in the I-D may be almost complete to move =
forward.
> The carrying document however deserves an update before going to the =
next
> step. I do not repeat every comment raised by Yang doctors in last =
December,
> but those need to be addressed as well.
>=20
[Xufeng] Replied in a separate email thread.

> _Comments_
> - Add "import ietf-isis" and "import ietf-bgp" (page 9)
[Xufeng] Added "ietf-isis". The model "ietf-bgp" has expired and fails =
to compile. We may wait for a newer version of it. Since we do not use =
any type or grouping from "ietf-bgp", we do not need to import it for =
now.

> - According to RFC 6087, section 3.1, "the module description =
statement MUST
> contain a reference to the latest approved IETF Trust Copyright =
statement" (p
> 10).
[Xufeng] Fixed. Thanks.

> - Both "prefix-set-ref" and "route-policy-ref" are defined as new =
types (p 11): is
> there a reason not to consider them as generic types specified =
elsewhere (e.g.,
> among routing types).
[Xufeng] These two local definitions are intended to refer any common =
types defined in other models whenever available. At this moment, =
https://datatracker.ietf.org/doc/draft-ietf-rtgwg-policy-model/ has =
expired and does not compile. We will update this model whenever an =
updated policy model is available.

> - Yangvalidator raises errors on the 6 "must" expressions (cf. Yang =
doctors'
> review).
[Xufeng] Fixed.=20

> - The security section does not say anything about the read/write =
fields nor the
> "clear route" RPC: it really requires some work, please see the =
template in RFC
> 6087, section 6.1.
[Xufeng] Updated the security section.

> - Normative references needs to be updated, at least with the =
following:
>   * RFC 6991
>   * RFC 7223
>   * RFC 7277
>   * draft-ietf-rtgwg-routing-types
>   * draft-ietf-rtgwg-yang-key-chain
>   * draft-ietf-ospf-yang
>   * draft-ietf-isis-yang-isis-cfg
>   * draft-ietf-idr-bgp-model
>   * draft-ietf-bfd-yang
[Xufeng] Updated.

> - Reading RFC 1724 (RIPv2 MIB) is clearly unnecessary to understand =
the
> document, the reference must thus be moved to the informative list.
[Xufeng] Adjusted as suggested.

>=20
> _Nits_
> - In the "bfd-protocol-parms" string (page 10), the abbreviation for =
"parameters"
> is unusual; was "params" intended?
[Xufeng] Changed to "bfd-protocol-parameters"

> - In "originate-default-route-container" (p 12), to be consistent: =
s/RIP or RIPng
> instance/RIP routing instance/
[Xufeng] Fixed.

> - In "redistribute-container" (p 12): s/BFP autonomous system/BGP =
autonomous
> system/
[Xufeng] Fixed.

> - In "list isis" (p 12-13): s/ISIS/IS-IS/  [5 times]
[Xufeng] Fixed.

> - In "list ospfv2" (p 14-15): s/OSPF routing instance into the RIP =
routing
[Xufeng] Fixed.

> instance/OSPFv2 routing instance into the RIPv2 routing instance/  =
[twice]
[Xufeng] Fixed.

> - In "route-type" of "list ospfv2" (p 15): s/OSPF routes matching the =
specified
> route type into the RIP routing instance/OSPFv2 routes matching the =
specified
> route type into the RIPv2 routing instance/
[Xufeng] Fixed.

> - In "list ospfv3" (p 15): s/OSPF routing instance into the RIP =
routing
> instance/OSPFv3 routing instance into the RIPng routing instance/  =
[twice]
[Xufeng] Fixed.

> - In "route-type" of "list ospfv3" (p 16): s/OSPF routes matching the =
specified
> route type into the RIP routing instance/OSPFv3 routes matching the =
specified
> route type into the RIPng routing instance/
[Xufeng] Fixed.

> - In "ripv2" (p 16): s/RIP routing instance into the current RIP =
routing
> instance/RIPv2 routing instance into the current RIPv2 routing =
instance/  [twice]
[Xufeng] Fixed.

> - In "leaf listen" of "list interface" (p 29): s/RIP or RIPng/RIPv2 or =
RIPng/
[Xufeng] Fixed.

> - In "container ipv4" (p 31): s/A RIPv2 RIP neighbor/A RIPv2 neighbor/
[Xufeng] Fixed.

> - In "container ipv6" (p 33): s/A RIPv2 RIP neighbor/A RIPng neighbor/
[Xufeng] Fixed.

> - In "leaf ipv6-prefix" of "container routes" (p 34): s/in =
RFC5952)and/in RFC5952)
> and/
[Xufeng] Fixed.

>=20
>=20
> Regards,
>=20
> Julien



From nobody Sat Jan 28 16:46:31 2017
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A new meeting session request has just been submitted by Jeff Tantsura, a Chair of the rtgwg working group.


---------------------------------------------------------
Working Group Name: Routing Area Working Group
Area Name: Routing Area
Session Requester: Jeff Tantsura

Number of Sessions: 2
Length of Session(s):  2 Hours, 2.5 Hours
Number of Attendees: 150
Conflicts to Avoid: 
 First Priority: isis mpls ospf pce idr spring
 Second Priority: bess bier teas ccamp i2rs l2sm
 Third Priority: bfd detnet lime nvo3 pim netmod


Special Requests:
  
---------------------------------------------------------


From nobody Tue Jan 31 02:25:19 2017
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Subject: Re: Routing Directorate QA Review of draft-ietf-rtgwg-yang-rip
To: Xufeng Liu <xufeng.liu.ietf@gmail.com>
References: <adbb1acc-8bf3-39cb-66a8-241f9de8063c@orange.com> <05f401d278dc$dd884800$9898d800$@gmail.com>
From: Julien Meuric <julien.meuric@orange.com>
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Hi Xufeng,

Thank you for the update. Looking at the diffs, it seems that you have
addressed my comments. This version is fine by me for a QA review at
this stage.

Thanks,

Julien


Jan. 27, 2017 - xufeng.liu.ietf@gmail.com:
> Hi Julien,
> 
> Thank you much for the review. An updated version https://tools.ietf.org/html/draft-ietf-rtgwg-yang-rip-03 has been posted to address most of these items.
> Please let us know for any further issues.
> 
> Thanks,
> - Xufeng
> 
> 
>> -----Original Message-----
>> From: Julien Meuric [mailto:julien.meuric@orange.com]
>> Sent: Friday, January 13, 2017 11:40 AM
>>
>> Hello,
>>
>> I have been selected as the Routing Directorate QA reviewer for this draft. For
>> more information about the Routing Directorate, please see
>> €‹http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir
>>
>> At this stage, the intend of the following is not to discuss the WG's decision
>> about the I-D, but rather to help improving its content.
>>
>> Please not that I am not deep Yang expert, but RFC 6087 has provided me with
>> valuable guidelines.
>>
>> _Summary_
>> The Yang module specified in the I-D may be almost complete to move forward.
>> The carrying document however deserves an update before going to the next
>> step. I do not repeat every comment raised by Yang doctors in last December,
>> but those need to be addressed as well.
>>
> [Xufeng] Replied in a separate email thread.
> 
>> _Comments_
>> - Add "import ietf-isis" and "import ietf-bgp" (page 9)
> [Xufeng] Added "ietf-isis". The model "ietf-bgp" has expired and fails to compile. We may wait for a newer version of it. Since we do not use any type or grouping from "ietf-bgp", we do not need to import it for now.
> 
>> - According to RFC 6087, section 3.1, "the module description statement MUST
>> contain a reference to the latest approved IETF Trust Copyright statement" (p
>> 10).
> [Xufeng] Fixed. Thanks.
> 
>> - Both "prefix-set-ref" and "route-policy-ref" are defined as new types (p 11): is
>> there a reason not to consider them as generic types specified elsewhere (e.g.,
>> among routing types).
> [Xufeng] These two local definitions are intended to refer any common types defined in other models whenever available. At this moment, https://datatracker.ietf.org/doc/draft-ietf-rtgwg-policy-model/ has expired and does not compile. We will update this model whenever an updated policy model is available.
> 
>> - Yangvalidator raises errors on the 6 "must" expressions (cf. Yang doctors'
>> review).
> [Xufeng] Fixed. 
> 
>> - The security section does not say anything about the read/write fields nor the
>> "clear route" RPC: it really requires some work, please see the template in RFC
>> 6087, section 6.1.
> [Xufeng] Updated the security section.
> 
>> - Normative references needs to be updated, at least with the following:
>>   * RFC 6991
>>   * RFC 7223
>>   * RFC 7277
>>   * draft-ietf-rtgwg-routing-types
>>   * draft-ietf-rtgwg-yang-key-chain
>>   * draft-ietf-ospf-yang
>>   * draft-ietf-isis-yang-isis-cfg
>>   * draft-ietf-idr-bgp-model
>>   * draft-ietf-bfd-yang
> [Xufeng] Updated.
> 
>> - Reading RFC 1724 (RIPv2 MIB) is clearly unnecessary to understand the
>> document, the reference must thus be moved to the informative list.
> [Xufeng] Adjusted as suggested.
> 
>>
>> _Nits_
>> - In the "bfd-protocol-parms" string (page 10), the abbreviation for "parameters"
>> is unusual; was "params" intended?
> [Xufeng] Changed to "bfd-protocol-parameters"
> 
>> - In "originate-default-route-container" (p 12), to be consistent: s/RIP or RIPng
>> instance/RIP routing instance/
> [Xufeng] Fixed.
> 
>> - In "redistribute-container" (p 12): s/BFP autonomous system/BGP autonomous
>> system/
> [Xufeng] Fixed.
> 
>> - In "list isis" (p 12-13): s/ISIS/IS-IS/  [5 times]
> [Xufeng] Fixed.
> 
>> - In "list ospfv2" (p 14-15): s/OSPF routing instance into the RIP routing
> [Xufeng] Fixed.
> 
>> instance/OSPFv2 routing instance into the RIPv2 routing instance/  [twice]
> [Xufeng] Fixed.
> 
>> - In "route-type" of "list ospfv2" (p 15): s/OSPF routes matching the specified
>> route type into the RIP routing instance/OSPFv2 routes matching the specified
>> route type into the RIPv2 routing instance/
> [Xufeng] Fixed.
> 
>> - In "list ospfv3" (p 15): s/OSPF routing instance into the RIP routing
>> instance/OSPFv3 routing instance into the RIPng routing instance/  [twice]
> [Xufeng] Fixed.
> 
>> - In "route-type" of "list ospfv3" (p 16): s/OSPF routes matching the specified
>> route type into the RIP routing instance/OSPFv3 routes matching the specified
>> route type into the RIPng routing instance/
> [Xufeng] Fixed.
> 
>> - In "ripv2" (p 16): s/RIP routing instance into the current RIP routing
>> instance/RIPv2 routing instance into the current RIPv2 routing instance/  [twice]
> [Xufeng] Fixed.
> 
>> - In "leaf listen" of "list interface" (p 29): s/RIP or RIPng/RIPv2 or RIPng/
> [Xufeng] Fixed.
> 
>> - In "container ipv4" (p 31): s/A RIPv2 RIP neighbor/A RIPv2 neighbor/
> [Xufeng] Fixed.
> 
>> - In "container ipv6" (p 33): s/A RIPv2 RIP neighbor/A RIPng neighbor/
> [Xufeng] Fixed.
> 
>> - In "leaf ipv6-prefix" of "container routes" (p 34): s/in RFC5952)and/in RFC5952)
>> and/
> [Xufeng] Fixed.
> 
>>
>>
>> Regards,
>>
>> Julien
> 
> 


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