
From takeda.tomonori@lab.ntt.co.jp  Mon Aug  9 02:55:26 2010
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Date: Mon, 09 Aug 2010 18:52:52 +0900
From: Tomonori TAKEDA <takeda.tomonori@lab.ntt.co.jp>
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Cc: rtg-dir@ietf.org, draft-ietf-isis-ipv6-te@tools.ietf.org
Subject: [RTG-DIR] RtgDir review: dratf-ietf-isis-ipv6-te-07.txt
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Hello,

I have been selected as the Routing Directorate reviewer for this draft.
The Routing Directorate seeks to review all routing or routing-related
drafts as they pass through IETF last call and IESG review. The purpose
of the review is to provide assistance to the Routing ADs. For more
information about the Routing Directorate, please see
http://www.ietf.org/iesg/directorate/routing.html

Although these comments are primarily for the use of the Routing ADs, it
would be helpful if you could consider them along with any other IETF
Last Call comments that you receive, and strive to resolve them through
discussion or by updating the draft.


Document: dratf-ietf-isis-ipv6-te-07.txt
Reviewer: Tomonori Takeda
Review Date: 9 August 2010
IETF LC End Date: Unknown
Intended Status: Standards Track



Summary:
This document is basically ready for publication, but has some minor
issues to be considered before publication.


Comments:
This document is well written and easy to read. I have several nits and
one minor question.


Major Issues:
No major issues found.


Minor Issues:

Section 3.1.1:
Global, site-local and link-local addresses are mentioned. Have you
considered that site-local addresses have been deprecated by RFC 3879?
Have you considered unique local addresses in RFC 4139?


Nits:

- I would suggest to add RFC 2119 to normative references.

- Usually, the main body starts with Introduction section, followed by
Requirement Words. I would suggest that Section 2 (Overview) is moved up
to Section 1, followed by Requirement Words (or Requirement Words can be
a separate section).


Tomonori Takeda


From jon.harrison@metaswitch.com  Mon Aug  9 10:06:29 2010
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From: Jonathan Harrison <jon.harrison@metaswitch.com>
To: Tomonori TAKEDA <takeda.tomonori@lab.ntt.co.jp>
Date: Mon, 9 Aug 2010 18:07:00 +0100
Thread-Topic: RtgDir review: dratf-ietf-isis-ipv6-te-07.txt
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Subject: Re: [RTG-DIR] RtgDir review: dratf-ietf-isis-ipv6-te-07.txt
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--_002_11DE3EEC54A8A44EAD99D8C0D3FD7207A03E5C4410ENFIMBOX1adda_
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Hi,

Thanks for the useful comments. =20

For section 3.1.1, I agree that it is better to consider unique-local (as p=
er RFC 4193) than the deprecated site-local addresses.

As for the nits, I'm happy to change the ordering so that section 1 is the =
overview, which is followed by the requirements words, and I'm happy to add=
 RFC 2119 as a normative reference.

I've attached an updated version of the draft with these markups (plus some=
 updated contact details).  Could you please let me know if you think any f=
urther changes are required?

Thanks,
Jon


-----Original Message-----
From: Tomonori TAKEDA [mailto:takeda.tomonori@lab.ntt.co.jp]=20
Sent: 09 August 2010 10:53
To: rtg-ads@tools.ietf.org
Cc: rtg-dir@ietf.org; draft-ietf-isis-ipv6-te@tools.ietf.org
Subject: RtgDir review: dratf-ietf-isis-ipv6-te-07.txt

Hello,

I have been selected as the Routing Directorate reviewer for this draft.
The Routing Directorate seeks to review all routing or routing-related
drafts as they pass through IETF last call and IESG review. The purpose
of the review is to provide assistance to the Routing ADs. For more
information about the Routing Directorate, please see
http://www.ietf.org/iesg/directorate/routing.html

Although these comments are primarily for the use of the Routing ADs, it
would be helpful if you could consider them along with any other IETF
Last Call comments that you receive, and strive to resolve them through
discussion or by updating the draft.


Document: dratf-ietf-isis-ipv6-te-07.txt
Reviewer: Tomonori Takeda
Review Date: 9 August 2010
IETF LC End Date: Unknown
Intended Status: Standards Track



Summary:
This document is basically ready for publication, but has some minor
issues to be considered before publication.


Comments:
This document is well written and easy to read. I have several nits and
one minor question.


Major Issues:
No major issues found.


Minor Issues:

Section 3.1.1:
Global, site-local and link-local addresses are mentioned. Have you
considered that site-local addresses have been deprecated by RFC 3879?
Have you considered unique local addresses in RFC 4139?


Nits:

- I would suggest to add RFC 2119 to normative references.

- Usually, the main body starts with Introduction section, followed by
Requirement Words. I would suggest that Section 2 (Overview) is moved up
to Section 1, followed by Requirement Words (or Requirement Words can be
a separate section).


Tomonori Takeda


--_002_11DE3EEC54A8A44EAD99D8C0D3FD7207A03E5C4410ENFIMBOX1adda_
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--_002_11DE3EEC54A8A44EAD99D8C0D3FD7207A03E5C4410ENFIMBOX1adda_--

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From: Tomonori TAKEDA <takeda.tomonori@lab.ntt.co.jp>
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To: Jonathan Harrison <jon.harrison@metaswitch.com>
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Subject: Re: [RTG-DIR] RtgDir review: dratf-ietf-isis-ipv6-te-07.txt
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Hi Jon,

Thanks for the update.

A few more comments (for nits). I think Section 6 (IPv4/IPv6 Migration)
is added from the version on the IETF site, which is a bit hard to
understand for me.


Section 2:
s/RFC 2119/[RFC2119]


Section 6:
Currently,
   The IS-IS extensions described in this document allow the routing of
   GMPLS LSPs using IPv6 addressing through an IS-IS network.

How about,
  The IS-IS extensions described in this document allow exchanging
  MPLS/GMPLS TE information in LSPs using IPv6 addressing through an
  IS-IS network.

Also, I would suggest to spell out LSP (Link State Protocol Data Unit)
at its first usage (Section 3.1.1), since some people may think LSP as
Label Switched Path.


Section 6:
   Migration of LSPs from IPv4 to IPv6 is an issue for GMPLS signaling
   and is outside the scope of this document.

I am not sure what this means. Are you saying that migration of LSPs
from IPv4 addressing to IPv6 addressing is a matter of TE database,
which can be further used to build ERO in MPLS/GMPLS RSVP-TE signaling?


Thanks,
Tomonori Takeda

Jonathan Harrison wrote:
> Hi,
> 
> Thanks for the useful comments.  
> 
> For section 3.1.1, I agree that it is better to consider unique-local (as per RFC 4193) than the deprecated site-local addresses.
> 
> As for the nits, I'm happy to change the ordering so that section 1 is the overview, which is followed by the requirements words, and I'm happy to add RFC 2119 as a normative reference.
> 
> I've attached an updated version of the draft with these markups (plus some updated contact details).  Could you please let me know if you think any further changes are required?
> 
> Thanks,
> Jon
> 
> 
> -----Original Message-----
> From: Tomonori TAKEDA [mailto:takeda.tomonori@lab.ntt.co.jp] 
> Sent: 09 August 2010 10:53
> To: rtg-ads@tools.ietf.org
> Cc: rtg-dir@ietf.org; draft-ietf-isis-ipv6-te@tools.ietf.org
> Subject: RtgDir review: dratf-ietf-isis-ipv6-te-07.txt
> 
> Hello,
> 
> I have been selected as the Routing Directorate reviewer for this draft.
> The Routing Directorate seeks to review all routing or routing-related
> drafts as they pass through IETF last call and IESG review. The purpose
> of the review is to provide assistance to the Routing ADs. For more
> information about the Routing Directorate, please see
> http://www.ietf.org/iesg/directorate/routing.html
> 
> Although these comments are primarily for the use of the Routing ADs, it
> would be helpful if you could consider them along with any other IETF
> Last Call comments that you receive, and strive to resolve them through
> discussion or by updating the draft.
> 
> 
> Document: dratf-ietf-isis-ipv6-te-07.txt
> Reviewer: Tomonori Takeda
> Review Date: 9 August 2010
> IETF LC End Date: Unknown
> Intended Status: Standards Track
> 
> 
> 
> Summary:
> This document is basically ready for publication, but has some minor
> issues to be considered before publication.
> 
> 
> Comments:
> This document is well written and easy to read. I have several nits and
> one minor question.
> 
> 
> Major Issues:
> No major issues found.
> 
> 
> Minor Issues:
> 
> Section 3.1.1:
> Global, site-local and link-local addresses are mentioned. Have you
> considered that site-local addresses have been deprecated by RFC 3879?
> Have you considered unique local addresses in RFC 4139?
> 
> 
> Nits:
> 
> - I would suggest to add RFC 2119 to normative references.
> 
> - Usually, the main body starts with Introduction section, followed by
> Requirement Words. I would suggest that Section 2 (Overview) is moved up
> to Section 1, followed by Requirement Words (or Requirement Words can be
> a separate section).
> 
> 
> Tomonori Takeda
> 


-- 
Tomonori TAKEDA
NTT Network Service Systems Lab.
Phone: +81-422-59-7434


From jon.harrison@metaswitch.com  Tue Aug 10 03:20:52 2010
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From: Jonathan Harrison <jon.harrison@metaswitch.com>
To: Tomonori TAKEDA <takeda.tomonori@lab.ntt.co.jp>
Date: Tue, 10 Aug 2010 11:21:22 +0100
Thread-Topic: [RTG-DIR] RtgDir review: dratf-ietf-isis-ipv6-te-07.txt
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Subject: Re: [RTG-DIR] RtgDir review: dratf-ietf-isis-ipv6-te-07.txt
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Hi Tomonori Takeda,

I've made your suggested change to section 2.

Section 6 is a proposed addition in response to the Operations Directorate =
review (see the attached e-mail).  As you point out, I should spell out LSP=
 when talking about IS-IS and MPLS to avoid confusion.  The intended meanin=
g was Label Switched Path, so the section should have read as follows.

6.  IPv4/IPv6 Migration

   The IS-IS extensions described in this document allow the routing of
   GMPLS label switched paths using IPv6 addressing through an IS-IS=20
   network.  There are no migration issues introduced by the addition of
   this IPv6 TE routing information into an existing IPv4 GMPLS network.
   Migration of label switched paths from IPv4 to IPv6 is an issue for=20
   GMPLS signaling and is outside the scope of this document.

Does that seem reasonable?

Thanks,
Jon

-----Original Message-----
From: Tomonori TAKEDA [mailto:takeda.tomonori@lab.ntt.co.jp]=20
Sent: 10 August 2010 08:46
To: Jonathan Harrison
Cc: rtg-dir@ietf.org; rtg-ads@tools.ietf.org; draft-ietf-isis-ipv6-te@tools=
.ietf.org; stbryant@cisco.com
Subject: Re: [RTG-DIR] RtgDir review: dratf-ietf-isis-ipv6-te-07.txt

Hi Jon,

Thanks for the update.

A few more comments (for nits). I think Section 6 (IPv4/IPv6 Migration)
is added from the version on the IETF site, which is a bit hard to
understand for me.


Section 2:
s/RFC 2119/[RFC2119]


Section 6:
Currently,
   The IS-IS extensions described in this document allow the routing of
   GMPLS LSPs using IPv6 addressing through an IS-IS network.

How about,
  The IS-IS extensions described in this document allow exchanging
  MPLS/GMPLS TE information in LSPs using IPv6 addressing through an
  IS-IS network.

Also, I would suggest to spell out LSP (Link State Protocol Data Unit)
at its first usage (Section 3.1.1), since some people may think LSP as
Label Switched Path.


Section 6:
   Migration of LSPs from IPv4 to IPv6 is an issue for GMPLS signaling
   and is outside the scope of this document.

I am not sure what this means. Are you saying that migration of LSPs
from IPv4 addressing to IPv6 addressing is a matter of TE database,
which can be further used to build ERO in MPLS/GMPLS RSVP-TE signaling?


Thanks,
Tomonori Takeda

Jonathan Harrison wrote:
> Hi,
>=20
> Thanks for the useful comments. =20
>=20
> For section 3.1.1, I agree that it is better to consider unique-local (as=
 per RFC 4193) than the deprecated site-local addresses.
>=20
> As for the nits, I'm happy to change the ordering so that section 1 is th=
e overview, which is followed by the requirements words, and I'm happy to a=
dd RFC 2119 as a normative reference.
>=20
> I've attached an updated version of the draft with these markups (plus so=
me updated contact details).  Could you please let me know if you think any=
 further changes are required?
>=20
> Thanks,
> Jon
>=20
>=20
> -----Original Message-----
> From: Tomonori TAKEDA [mailto:takeda.tomonori@lab.ntt.co.jp]=20
> Sent: 09 August 2010 10:53
> To: rtg-ads@tools.ietf.org
> Cc: rtg-dir@ietf.org; draft-ietf-isis-ipv6-te@tools.ietf.org
> Subject: RtgDir review: dratf-ietf-isis-ipv6-te-07.txt
>=20
> Hello,
>=20
> I have been selected as the Routing Directorate reviewer for this draft.
> The Routing Directorate seeks to review all routing or routing-related
> drafts as they pass through IETF last call and IESG review. The purpose
> of the review is to provide assistance to the Routing ADs. For more
> information about the Routing Directorate, please see
> http://www.ietf.org/iesg/directorate/routing.html
>=20
> Although these comments are primarily for the use of the Routing ADs, it
> would be helpful if you could consider them along with any other IETF
> Last Call comments that you receive, and strive to resolve them through
> discussion or by updating the draft.
>=20
>=20
> Document: dratf-ietf-isis-ipv6-te-07.txt
> Reviewer: Tomonori Takeda
> Review Date: 9 August 2010
> IETF LC End Date: Unknown
> Intended Status: Standards Track
>=20
>=20
>=20
> Summary:
> This document is basically ready for publication, but has some minor
> issues to be considered before publication.
>=20
>=20
> Comments:
> This document is well written and easy to read. I have several nits and
> one minor question.
>=20
>=20
> Major Issues:
> No major issues found.
>=20
>=20
> Minor Issues:
>=20
> Section 3.1.1:
> Global, site-local and link-local addresses are mentioned. Have you
> considered that site-local addresses have been deprecated by RFC 3879?
> Have you considered unique local addresses in RFC 4139?
>=20
>=20
> Nits:
>=20
> - I would suggest to add RFC 2119 to normative references.
>=20
> - Usually, the main body starts with Introduction section, followed by
> Requirement Words. I would suggest that Section 2 (Overview) is moved up
> to Section 1, followed by Requirement Words (or Requirement Words can be
> a separate section).
>=20
>=20
> Tomonori Takeda
>=20


--=20
Tomonori TAKEDA
NTT Network Service Systems Lab.
Phone: +81-422-59-7434


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From: Jonathan Harrison <jon.harrison@metaswitch.com>
To: "Romascanu, Dan (Dan)" <dromasca@avaya.com>, Tina TSOU <tena@huawei.com>
CC: "stbryant@cisco.com" <stbryant@cisco.com>, Jon Berger
	<Jon.Berger@metaswitch.com>, Mike Bartlett <Mike.Bartlett@metaswitch.com>
Date: Mon, 9 Aug 2010 18:00:51 +0100
Subject: RE: [OPS-DIR] Operations Directorate Review
 ofdraft-ietf-isis-ipv6-te-07
Thread-Topic: [OPS-DIR] Operations Directorate Review
 ofdraft-ietf-isis-ipv6-te-07
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Hi Dan and Tina,

Thanks for the comments.

While I agree that there are potentially migration issues when moving MPLS =
LSPs from IPv4 to IPv6, these are out of scope for the underlying routing p=
rotocol - it is an issue for G-MPLS signaling.  In particular, when IPv6 ro=
uting information is available in a GMPLS network, this allows the CSPF cal=
culation to provide a route for new IPv6 LSPs.  It is the responsibility of=
 signaling to signal the new LSP and perform refresh and/or make-before-bre=
ak.

Do you agree that this is out-of-scope for this draft?  If so, would the ad=
dition of the following text to the draft be acceptable?

7.  IPv4/IPv6 Migration

The IS-IS extensions described in this document allow the routing of
GMPLS LSPs using IPv6 addressing through an IS-IS network.  There are
no migration issues introduced by the addition of this IPv6 TE routing
information into an existing IPv4 GMPLS network.  Migration of LSPs
from IPv4 to IPv6 is an issue for GMPLS signaling and is outside the
scope of this document.

Thanks,
Jon


  _____

From: Romascanu, Dan (Dan) [mailto:dromasca@avaya.com]
Sent: 06 August 2010 10:39
To: Jonathan Harrison; Jon Berger; Mike Bartlett
Cc: stbryant@cisco.com; Tina TSOU
Subject: FW: [OPS-DIR] Operations Directorate Review ofdraft-ietf-isis-ipv6=
-te-07


Hi,

Please address the issues raised by Tina Tsou in her OPS-DIR review.

Regards,

Dan




  _____

From: ops-dir-bounces@ietf.org [mailto:ops-dir-bounces@ietf.org] On Behalf =
Of Tina TSOU
Sent: Tuesday, July 06, 2010 4:26 AM
To: ops-dir@ietf.org
Subject: [OPS-DIR] Operations Directorate Review ofdraft-ietf-isis-ipv6-te-=
07


Hi,

...

I gave this a read through, it looks like when the original GMPLS-TE extens=
ions were done they did not include IPV6 which was a real oversite and that=
 this draft simply is correcting that mistake. Since all of these TLV's are=
 just parallels of existing TLVs with contents that have V6 as opposed to V=
4 addresses there are almost certainly no new operational issues with an en=
tirely V6 network.

However that would leave migration as the main concern. Now they don't talk=
 too much about it in this draft so its hard to gauge if they have indeed a=
ddressed it properly.

One example would be what happens when a link is identified as V4 at one en=
d and V6 at the other (during a migration to V6 addressing). Does the CSPF =
and signalling all 'just work'.

What happens to a new PCE and signalling sequence in this case.. more impor=
tantly does make before break still work (when the original was V4 signalle=
d)? What about refresh reduction?

I don't know the answers to the above questions since I'd have to go and ex=
tensively study the current drafts/RFC's but I think the Authors should add=
 a section on migration and indicate that 1) new LSP setup works, 2) refres=
h is not affected on existing paths that traverse a link when the V4 is sub=
stinted for a V6 with 100'of LSP's up on it and 3) make before break is not=
 affected during migration.

So my general comment would be something like this:

"More information that migration has been taken into consideration and that=
 partial V4/V6 operation works for all the major features of GMPLS/RSVP-TE =
{make before break, new connections, refresh reduction, FRR etc.} should be=
 added. Or, if this has been addresses somewhere else a comment to that eff=
ect with an explicit reference should be added."

B. R.
Tina
http://tinatsou.weebly.com/contact.html


--_000_7974807778746567787071737776698074787276777267767574707_
Content-Type: text/html; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
<meta name=3D"GENERATOR" content=3D"MSHTML 8.00.6001.18928">
<style></style>
</head>
<body bgcolor=3D"#ffffff">
<div dir=3D"ltr" align=3D"left"><span class=3D"018472114-09082010"><font co=
lor=3D"#800080" size=3D"2" face=3D"Arial">Hi Dan and Tina,</font></span></d=
iv>
<div dir=3D"ltr" align=3D"left"><span class=3D"018472114-09082010"><font co=
lor=3D"#800080" size=3D"2" face=3D"Arial"></font></span>&nbsp;</div>
<div dir=3D"ltr" align=3D"left"><span class=3D"018472114-09082010"><font co=
lor=3D"#800080" size=3D"2" face=3D"Arial">Thanks for the comments.&nbsp;
</font></span></div>
<div><font color=3D"#800080" size=3D"2" face=3D"Arial"></font>&nbsp;</div>
<div><span class=3D"018472114-09082010"><font color=3D"#800080" size=3D"2" =
face=3D"Arial">While I agree that there are potentially migration issues wh=
en moving MPLS LSPs from IPv4 to IPv6, these are out of scope for the under=
lying routing protocol - it is an issue
 for G-MPLS signaling.&nbsp; In particular,&nbsp;when IPv6 routing informat=
ion is available in a GMPLS network, this allows&nbsp;the CSPF calculation =
to provide a route for new IPv6 LSPs.&nbsp; It is the responsibility of sig=
naling to&nbsp;signal the new LSP and perform refresh and/or
 make-before-break.</font></span></div>
<div><font color=3D"#800080" size=3D"2" face=3D"Arial"></font><font color=
=3D"#800080" size=3D"2" face=3D"Arial"></font><font color=3D"#800080" size=
=3D"2" face=3D"Arial"></font><font color=3D"#800080" size=3D"2" face=3D"Ari=
al"></font><font color=3D"#800080" size=3D"2" face=3D"Arial"></font><font c=
olor=3D"#800080" size=3D"2" face=3D"Arial"></font><font color=3D"#800080" s=
ize=3D"2" face=3D"Arial"></font><font color=3D"#800080" size=3D"2" face=3D"=
Arial"></font><font color=3D"#800080" size=3D"2" face=3D"Arial"></font>&nbs=
p;</div>
<div><font color=3D"#800080" size=3D"2" face=3D"Arial"><span class=3D"01847=
2114-09082010">Do you agree that this is out-of-scope for this draft?&nbsp;=
 If so,&nbsp;would the addition of the following text&nbsp;to the draft be =
acceptable?&nbsp;
</span></font></div>
<blockquote style=3D"MARGIN-RIGHT: 0px" dir=3D"ltr">
<div><font color=3D"#800080" size=3D"2" face=3D"Arial">7.&nbsp; IPv4/IPv6 M=
igration</font></div>
<div><font color=3D"#800080" size=3D"2" face=3D"Arial"></font>&nbsp;</div>
<div><font color=3D"#800080" size=3D"2" face=3D"Arial">The IS-IS extensions=
 described in this document allow the routing of<br>
GMPLS LSPs using IPv6 addressing through an IS-IS network.&nbsp; There are<=
br>
no migration issues introduced by the addition of this IPv6 TE routing<br>
information into an existing IPv4 GMPLS network.&nbsp; Migration of LSPs<br=
>
from IPv4 to IPv6 is an issue for GMPLS signaling and is outside the<br>
scope of this document.</font></div>
</blockquote>
<div><font color=3D"#800080" size=3D"2" face=3D"Arial"><span class=3D"01847=
2114-09082010">Thanks,</span></font></div>
<div><font color=3D"#800080" size=3D"2" face=3D"Arial"><span class=3D"01847=
2114-09082010">Jon</span></font></div>
<div><font color=3D"#800080" size=3D"2" face=3D"Arial"></font>&nbsp;</div>
<div><br>
</div>
<div dir=3D"ltr" lang=3D"en-us" class=3D"OutlookMessageHeader" align=3D"lef=
t">
<hr tabindex=3D"-1">
<font size=3D"2" face=3D"Tahoma"><b>From:</b> Romascanu, Dan (Dan) [mailto:=
dromasca@avaya.com]
<br>
<b>Sent:</b> 06 August 2010 10:39<br>
<b>To:</b> Jonathan Harrison; Jon Berger; Mike Bartlett<br>
<b>Cc:</b> stbryant@cisco.com; Tina TSOU<br>
<b>Subject:</b> FW: [OPS-DIR] Operations Directorate Review ofdraft-ietf-is=
is-ipv6-te-07<br>
</font><br>
</div>
<div></div>
<div><font color=3D"#0000ff" size=3D"2" face=3D"Arial"><span class=3D"49838=
3309-06082010">Hi,</span></font></div>
<div><font color=3D"#0000ff" size=3D"2" face=3D"Arial"><span class=3D"49838=
3309-06082010"></span></font>&nbsp;</div>
<div><font color=3D"#0000ff" size=3D"2" face=3D"Arial"><span class=3D"49838=
3309-06082010">Please address the issues raised by Tina Tsou in her OPS-DIR=
 review.</span></font></div>
<div><font color=3D"#0000ff" size=3D"2" face=3D"Arial"><span class=3D"49838=
3309-06082010"></span></font>&nbsp;</div>
<div><font color=3D"#0000ff" size=3D"2" face=3D"Arial"><span class=3D"49838=
3309-06082010">Regards,</span></font></div>
<div><font color=3D"#0000ff" size=3D"2" face=3D"Arial"><span class=3D"49838=
3309-06082010"></span></font>&nbsp;</div>
<div><font color=3D"#0000ff" size=3D"2" face=3D"Arial"><span class=3D"49838=
3309-06082010">Dan</span></font></div>
<div><font color=3D"#0000ff" size=3D"2" face=3D"Arial"><span class=3D"49838=
3309-06082010"></span></font>&nbsp;</div>
<font color=3D"#0000ff" size=3D"2" face=3D"Arial"></font><br>
<blockquote style=3D"MARGIN-RIGHT: 0px" dir=3D"ltr">
<div dir=3D"ltr" lang=3D"en-us" class=3D"OutlookMessageHeader" align=3D"lef=
t">
<hr tabindex=3D"-1">
<font size=3D"2" face=3D"Tahoma"><b>From:</b> ops-dir-bounces@ietf.org [mai=
lto:ops-dir-bounces@ietf.org]
<b>On Behalf Of </b>Tina TSOU<br>
<b>Sent:</b> Tuesday, July 06, 2010 4:26 AM<br>
<b>To:</b> ops-dir@ietf.org<br>
<b>Subject:</b> [OPS-DIR] Operations Directorate Review ofdraft-ietf-isis-i=
pv6-te-07<br>
</font><br>
</div>
<div></div>
<div><font size=3D"2" face=3D"Arial">Hi, </font></div>
<div><font color=3D"#0000ff" size=3D"2" face=3D"Arial"><span class=3D"49838=
3309-06082010"></span></font>&nbsp;</div>
<div><font color=3D"#0000ff" size=3D"2" face=3D"Arial"><span class=3D"49838=
3309-06082010">...&nbsp;</span></font></div>
<div><font size=3D"2" face=3D"Arial"></font>&nbsp;</div>
<div><font size=3D"2" face=3D"Arial">I gave this a read through, it looks l=
ike when the original GMPLS-TE extensions were done they did not include IP=
V6 which was a real oversite and that this draft simply is correcting that =
mistake. Since all of these TLV's are
 just parallels of existing TLVs with contents that have V6 as opposed to V=
4 addresses there are almost certainly no new operational issues with an en=
tirely V6 network.</font></div>
<div><font color=3D"#800080" size=3D"2" face=3D"Arial"></font>&nbsp;</div>
<div><font size=3D"2" face=3D"Arial">However that would leave migration as =
the main concern. Now they don't talk too much about it in this draft so it=
s hard to gauge if they have indeed addressed it properly.
</font></div>
<div><font color=3D"#800080" size=3D"2" face=3D"Arial"></font>&nbsp;</div>
<div><font size=3D"2" face=3D"Arial">One example would be what happens when=
 a link is identified as V4 at one end and V6 at the other (during a migrat=
ion to V6 addressing). Does the CSPF and signalling all 'just work'.</font>=
</div>
<div><font color=3D"#800080" size=3D"2" face=3D"Arial"></font>&nbsp;</div>
<div><font size=3D"2" face=3D"Arial">What happens to a new PCE and signalli=
ng sequence in this case.. more importantly does make before break still wo=
rk (when the original was V4 signalled)? What about refresh reduction?</fon=
t></div>
<div><font color=3D"#800080" size=3D"2" face=3D"Arial"></font>&nbsp;</div>
<div><font size=3D"2" face=3D"Arial">I don't know the answers to the above =
questions since I'd have to go and extensively study the current drafts/RFC=
's but I think the Authors should add a section on migration and indicate t=
hat 1) new LSP setup works, 2) refresh
 is not affected on existing paths that traverse a link when the V4 is subs=
tinted for a V6 with 100'of LSP's up on it and 3) make before break is not =
affected during migration.</font></div>
<div><font color=3D"#800080" size=3D"2" face=3D"Arial"></font>&nbsp;</div>
<div><font size=3D"2" face=3D"Arial">So my general comment would be somethi=
ng like this:</font></div>
<div><font color=3D"#800080" size=3D"2" face=3D"Arial"></font>&nbsp;</div>
<div><font size=3D"2" face=3D"Arial">&quot;More information that migration =
has been taken into consideration and that partial V4/V6 operation works fo=
r all the major features of GMPLS/RSVP-TE {make before break, new connectio=
ns, refresh reduction, FRR etc.} should be
 added. Or, if this has been addresses somewhere else a comment to that eff=
ect with an explicit reference should be added.&quot;</font></div>
<div><font size=3D"2" face=3D"Arial"></font>&nbsp;</div>
<div><font size=3D"2" face=3D"Arial">B. R.<br>
Tina<br>
<a href=3D"http://tinatsou.weebly.com/contact.html">http://tinatsou.weebly.=
com/contact.html</a></font></div>
</blockquote>
</body>
</html>

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From takeda.tomonori@lab.ntt.co.jp  Tue Aug 10 08:52:43 2010
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From: Tomonori TAKEDA <takeda.tomonori@lab.ntt.co.jp>
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Subject: Re: [RTG-DIR] RtgDir review: dratf-ietf-isis-ipv6-te-07.txt
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Hi Jon,

Thanks for clarification.
The proposed text is good for me.

Tomonori Takeda

Jonathan Harrison wrote:
> Hi Tomonori Takeda,
> 
> I've made your suggested change to section 2.
> 
> Section 6 is a proposed addition in response to the Operations Directorate review (see the attached e-mail).  As you point out, I should spell out LSP when talking about IS-IS and MPLS to avoid confusion.  The intended meaning was Label Switched Path, so the section should have read as follows.
> 
> 6.  IPv4/IPv6 Migration
> 
>    The IS-IS extensions described in this document allow the routing of
>    GMPLS label switched paths using IPv6 addressing through an IS-IS 
>    network.  There are no migration issues introduced by the addition of
>    this IPv6 TE routing information into an existing IPv4 GMPLS network.
>    Migration of label switched paths from IPv4 to IPv6 is an issue for 
>    GMPLS signaling and is outside the scope of this document.
> 
> Does that seem reasonable?
> 
> Thanks,
> Jon
> 
> -----Original Message-----
> From: Tomonori TAKEDA [mailto:takeda.tomonori@lab.ntt.co.jp] 
> Sent: 10 August 2010 08:46
> To: Jonathan Harrison
> Cc: rtg-dir@ietf.org; rtg-ads@tools.ietf.org; draft-ietf-isis-ipv6-te@tools.ietf.org; stbryant@cisco.com
> Subject: Re: [RTG-DIR] RtgDir review: dratf-ietf-isis-ipv6-te-07.txt
> 
> Hi Jon,
> 
> Thanks for the update.
> 
> A few more comments (for nits). I think Section 6 (IPv4/IPv6 Migration)
> is added from the version on the IETF site, which is a bit hard to
> understand for me.
> 
> 
> Section 2:
> s/RFC 2119/[RFC2119]
> 
> 
> Section 6:
> Currently,
>    The IS-IS extensions described in this document allow the routing of
>    GMPLS LSPs using IPv6 addressing through an IS-IS network.
> 
> How about,
>   The IS-IS extensions described in this document allow exchanging
>   MPLS/GMPLS TE information in LSPs using IPv6 addressing through an
>   IS-IS network.
> 
> Also, I would suggest to spell out LSP (Link State Protocol Data Unit)
> at its first usage (Section 3.1.1), since some people may think LSP as
> Label Switched Path.
> 
> 
> Section 6:
>    Migration of LSPs from IPv4 to IPv6 is an issue for GMPLS signaling
>    and is outside the scope of this document.
> 
> I am not sure what this means. Are you saying that migration of LSPs
> from IPv4 addressing to IPv6 addressing is a matter of TE database,
> which can be further used to build ERO in MPLS/GMPLS RSVP-TE signaling?
> 
> 
> Thanks,
> Tomonori Takeda
> 
> Jonathan Harrison wrote:
>> Hi,
>>
>> Thanks for the useful comments.  
>>
>> For section 3.1.1, I agree that it is better to consider unique-local (as per RFC 4193) than the deprecated site-local addresses.
>>
>> As for the nits, I'm happy to change the ordering so that section 1 is the overview, which is followed by the requirements words, and I'm happy to add RFC 2119 as a normative reference.
>>
>> I've attached an updated version of the draft with these markups (plus some updated contact details).  Could you please let me know if you think any further changes are required?
>>
>> Thanks,
>> Jon
>>
>>
>> -----Original Message-----
>> From: Tomonori TAKEDA [mailto:takeda.tomonori@lab.ntt.co.jp] 
>> Sent: 09 August 2010 10:53
>> To: rtg-ads@tools.ietf.org
>> Cc: rtg-dir@ietf.org; draft-ietf-isis-ipv6-te@tools.ietf.org
>> Subject: RtgDir review: dratf-ietf-isis-ipv6-te-07.txt
>>
>> Hello,
>>
>> I have been selected as the Routing Directorate reviewer for this draft.
>> The Routing Directorate seeks to review all routing or routing-related
>> drafts as they pass through IETF last call and IESG review. The purpose
>> of the review is to provide assistance to the Routing ADs. For more
>> information about the Routing Directorate, please see
>> http://www.ietf.org/iesg/directorate/routing.html
>>
>> Although these comments are primarily for the use of the Routing ADs, it
>> would be helpful if you could consider them along with any other IETF
>> Last Call comments that you receive, and strive to resolve them through
>> discussion or by updating the draft.
>>
>>
>> Document: dratf-ietf-isis-ipv6-te-07.txt
>> Reviewer: Tomonori Takeda
>> Review Date: 9 August 2010
>> IETF LC End Date: Unknown
>> Intended Status: Standards Track
>>
>>
>>
>> Summary:
>> This document is basically ready for publication, but has some minor
>> issues to be considered before publication.
>>
>>
>> Comments:
>> This document is well written and easy to read. I have several nits and
>> one minor question.
>>
>>
>> Major Issues:
>> No major issues found.
>>
>>
>> Minor Issues:
>>
>> Section 3.1.1:
>> Global, site-local and link-local addresses are mentioned. Have you
>> considered that site-local addresses have been deprecated by RFC 3879?
>> Have you considered unique local addresses in RFC 4139?
>>
>>
>> Nits:
>>
>> - I would suggest to add RFC 2119 to normative references.
>>
>> - Usually, the main body starts with Introduction section, followed by
>> Requirement Words. I would suggest that Section 2 (Overview) is moved up
>> to Section 1, followed by Requirement Words (or Requirement Words can be
>> a separate section).
>>
>>
>> Tomonori Takeda
>>
> 
> 


-- 
Tomonori TAKEDA
NTT Network Service Systems Lab.
Phone: +81-422-59-7434

