Re: [Lsr] New Version Notification for draft-xu-lsr-flooding-reduction-in-clos-01.txt

["Les Ginsberg (ginsberg)" <[e-mail]>]

Xiaohu –

I also point out that there are at least two existing drafts which specifically address IS-IS flooding reduction in CLOS networks and do so in greater detail and with more robustness than what is in your draft:

https://datatracker.ietf.org/doc/draft-ietf-lsr-distoptflood/

https://datatracker.ietf.org/doc/draft-ietf-lsr-isis-spine-leaf-ext/

I do not see a need for yet another draft specifically aimed at CLOS networks.

Note that work on draft-ietf-lsr-isis-spine-leaf-ext was suspended due to lack of interest in deploying an IGP solution in CLOS networks.
You are suggesting in draft-xu-lsr-fare that AI is going to change this. Well, maybe, but if so I think we should return to the solutions already available and prioritize work on them.

   Les


From: Lsr <[e-mail]> On Behalf Of Tony Li
Sent: Thursday, November 23, 2023 8:39 AM
To: [e-mail]
Cc: [e-mail]
Subject: Re: [Lsr] New Version Notification for draft-xu-lsr-flooding-reduction-in-clos-01.txt

Hi,

What you’re proposing is already described in IS-IS Mesh Groups (https://www.rfc-editor.org/rfc/rfc2973.html) and improved upon in Dynamic Flooding (https://datatracker.ietf.org/doc/html/draft-ietf-lsr-dynamic-flooding).

Regards,
Tony



On Nov 23, 2023, at 8:29 AM, [e-mail]<mailto:[e-mail]> wrote:

Hi all,

Any comments or suggestions are welcome.

Best regards,
Xiaohu

发件人: [e-mail]<mailto:[e-mail]> <[e-mail]<mailto:[e-mail]>>
日期: 星期三, 2023年11月22日 11:37
收件人: Xiaohu Xu <[e-mail]<mailto:[e-mail]>>
主题: New Version Notification for draft-xu-lsr-flooding-reduction-in-clos-01.txt
A new version of Internet-Draft draft-xu-lsr-flooding-reduction-in-clos-01.txt
has been successfully submitted by Xiaohu Xu and posted to the
IETF repository.

Name:     draft-xu-lsr-flooding-reduction-in-clos
Revision: 01
Title:    Flooding Reduction in CLOS Networks
Date:     2023-11-22
Group:    Individual Submission
Pages:    6
URL:      https://www.ietf.org/archive/id/draft-xu-lsr-flooding-reduction-in-clos-01.txt
Status:   https://datatracker.ietf.org/doc/draft-xu-lsr-flooding-reduction-in-clos/
HTMLized: https://datatracker.ietf.org/doc/html/draft-xu-lsr-flooding-reduction-in-clos
Diff:     https://author-tools.ietf.org/iddiff?url2=draft-xu-lsr-flooding-reduction-in-clos-01

Abstract:

   In a CLOS topology, an OSPF (or ISIS) router may receive identical
   copies of an LSA (or LSP) from multiple OSPF (or ISIS) neighbors.
   Moreover, two OSPF (or ISIS) neighbors may exchange the same LSA (or
   LSP) simultaneously.  This results in unnecessary flooding of link-
   state information, which wastes the precious resources of OSPF (or
   ISIS) routers.  Therefore, this document proposes extensions to OSPF
   (or ISIS) to reduce this flooding within CLOS networks.  The
   reduction of OSPF (or ISIS) flooding is highly beneficial for
   improving the scalability of CLOS networks.



The IETF Secretariat

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