Hi Tony, I agree that the mesh group feature described in RFC2973 is a relatively simple mechanism to reduce the flooding of LSPs. However, it’s still a little bit complex since 1) it relies on a correct static configuration on all links; 2) it also modifies the behavior in the transmission of generated LSPs; 3) it modifies the transmission behavior of CSNP; 4) mesh groups are required to be connected by "transit" circuits which are ‘meshInactive’.
In contrast, the flooding reduction mechanism as proposed in my draft is much simpler. Best regards, Xiaohu 发件人: Tony Li <tony1ath...@gmail.com> 代表 Tony Li <tony...@tony.li> 日期: 星期五, 2023年11月24日 00:39 收件人: xuxiaohu_i...@hotmail.com <xuxiaohu_i...@hotmail.com> 抄送: lsr@ietf.org <lsr@ietf.org> 主题: Re: [Lsr] New Version Notification for draft-xu-lsr-flooding-reduction-in-clos-01.txt Hi Xiaohu, 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, xuxiaohu_i...@hotmail.com wrote: Hi all, Any comments or suggestions are welcome. Best regards, Xiaohu 发件人: internet-dra...@ietf.org <internet-dra...@ietf.org> 日期: 星期三, 2023年11月22日 11:37 收件人: Xiaohu Xu <xuxiaohu_i...@hotmail.com> 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 _______________________________________________ Lsr mailing list Lsr@ietf.org https://www.ietf.org/mailman/listinfo/lsr
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