Re: [Isis-wg] Review of draft-ietf-isis-extended-sequence-no-tlv-04

Uma Chunduri <uma.chunduri@ericsson.com> Thu, 26 March 2015 18:43 UTC

From: Uma Chunduri <uma.chunduri@ericsson.com>
To: Alia Atlas <akatlas@gmail.com>, Nevil Brownlee <n.brownlee@auckland.ac.nz>
Thread-Topic: Review of draft-ietf-isis-extended-sequence-no-tlv-04
Thread-Index: AQHQZ+SAC42uZyGno0i39UZi4HczX50vVPyA///De4A=
Date: Thu, 26 Mar 2015 18:43:09 +0000
Message-ID: <1B502206DFA0C544B7A60469152008633F618FCC@eusaamb105.ericsson.se>
References: <551437E7.9030406@auckland.ac.nz> <CAG4d1rcB0qp0yiLNCTvQmhqvgWFSvSUDfVGCDe6F0MQGzwQ==w@mail.gmail.com>
In-Reply-To: <CAG4d1rcB0qp0yiLNCTvQmhqvgWFSvSUDfVGCDe6F0MQGzwQ==w@mail.gmail.com>
Accept-Language: en-US
Content-Language: en-US
Content-Type: multipart/alternative; boundary="_000_1B502206DFA0C544B7A60469152008633F618FCCeusaamb105erics_"
MIME-Version: 1.0
Resent-To: draft-ietf-isis-extended-sequence-no-tlv.all@ietf.org
Resent-Message-Id: <20150326184320.E88F91ABD36@ietfa.amsl.com>
Resent-Date: Thu, 26 Mar 2015 11:43:20 -0700
Resent-From: uma.chunduri@ericsson.com
Archived-At: <http://mailarchive.ietf.org/arch/msg/draft-ietf-isis-extended-sequence-no-tlv.all@tools/XuFVKELNufxt-JEyCCAApmINV30>
Archived-At: <http://mailarchive.ietf.org/arch/msg/isis-wg/cOVH3hMOyKXP9jQStEtfWfGmA9s>
Cc: "ops-dir@ietf.org" <ops-dir@ietf.org>, "draft-ietf-isis-extended-sequence-no-tlv.all@tools.ietf.org" <draft-ietf-isis-extended-sequence-no-tlv.all@tools.ietf.org>
Subject: Re: [Isis-wg] Review of draft-ietf-isis-extended-sequence-no-tlv-04
Precedence: list

Hi Nevil,

Thank you very much for the review and suggestions.

We shall  take care of both the comments (in-line [Uma] below) in the next revision
along with routing directorate’s review comments.
--
Uma C.

From: Alia Atlas [mailto:akatlas@gmail.com]
Sent: Thursday, March 26, 2015 1:16 PM
To: Nevil Brownlee
Cc: ops-dir@ietf.org; draft-ietf-isis-extended-sequence-no-tlv.all@tools.ietf.org
Subject: Re: Review of draft-ietf-isis-extended-sequence-no-tlv-04

Nevil,

Thanks very much for the review.

Alia

On Thu, Mar 26, 2015 at 12:46 PM, Nevil Brownlee <n.brownlee@auckland.ac.nz<mailto:n.brownlee@auckland.ac.nz>> wrote:

Hi all:

I have reviewed this document as part of the Operational directorate's
ongoing effort to review all IETF documents being processed by the
IESG.  These comments were written primarily for the benefit of the
operational area directors.  Document editors and WG chairs should
treat these comments just like any other last call comments.

Overall, it seems fine to me.

Abstract:
  "This document defines Extended Sequence number TLV to protect
   Intermediate System to Intermediate System (IS-IS) PDUs from replay
   attacks."

Draft addresses Security concerns raised by the use of IS-IS in
Data Centre environments, and by the use of SDN in Data Centres.

"This document defines Extended Sequence number (ESN) TLV to protect
Intermediate System to Intermediate System (IS-IS) PDUs from replay
attacks."

[Uma]: Ack.


I presume that the ESSN will be given a random (but non-zero) when the
router boots up, then increments from there?
[Uma]: Yes, that’s correct.

This is covered in
detail in Appendix A, but perhaps a forward reference to that in
section 3 would be helpful.

[Uma]:  Sure, shall do that.


Section 5 on Backward Compatibility and Deployment seems clear
to me, and should help Operators to use this new feature.

Cheers, Nevil
Co-chair, EMAN WG

--
---------------------------------------------------------------------
 Nevil Brownlee                    Computer Science Department | ITS
 Phone: +64 9 373 7599 x88941<tel:%2B64%209%20373%207599%20x88941>             The University of Auckland
 FAX: +64 9 373 7453<tel:%2B64%209%20373%207453>   Private Bag 92019, Auckland 1142, New Zealand

[Isis-wg] Review of draft-ietf-isis-extended-sequ… Nevil Brownlee
Re: [Isis-wg] Review of draft-ietf-isis-extended-… Alia Atlas
Re: [Isis-wg] Review of draft-ietf-isis-extended-… Uma Chunduri