Tony - I am not enthused about this solution. Full mesh isn't appealing at scale. But I recognize this as an alternative which some might find useful in some deployments.
I also understand why and find it appropriate that you have introduced discussion of this alternative in LSR. But ultimately - as others have pointed out - this work does not belong in LSR. Finally, I object to the use of IGP Router Capability advertisements as the vehicle for advertising the availability of the service. There are examples today of applications which monitor the IGP LSDB in order to provide value add - and they often execute on nodes not actively participating in IGP routing. While running such a service on ABRs is certainly one alternative, it is not the only one. I do not want - nor do I find it appropriate - for Router Capability to be used as a form of DNS for such applications. Please find another means to advertise the availability of the service. Les From: Lsr <lsr-boun...@ietf.org> On Behalf Of Tony Li Sent: Tuesday, January 18, 2022 5:05 PM To: lsr <lsr@ietf.org> Subject: [Lsr] Fwd: New Version Notification for draft-li-lsr-liveness-00.txt FYI. This is a better alternative that PUA/Pulse. Tony Begin forwarded message: From: internet-dra...@ietf.org<mailto:internet-dra...@ietf.org> Subject: New Version Notification for draft-li-lsr-liveness-00.txt Date: January 18, 2022 at 5:04:22 PM PST To: <t...@ietfa.amsl.com<mailto:t...@ietfa.amsl.com>>, "Tony Li" <tony...@tony.li<mailto:tony...@tony.li>> A new version of I-D, draft-li-lsr-liveness-00.txt has been successfully submitted by Tony Li, and posted to the IETF repository. Name: draft-li-lsr-liveness Revision: 00 Title: Node Liveness Protocol Document date: 2022-01-18 Group: Individual Submission Pages: 9 URL: https://www.ietf.org/archive/id/draft-li-lsr-liveness-00.txt Status: https://datatracker.ietf.org/doc/draft-li-lsr-liveness/ Htmlized: https://datatracker.ietf.org/doc/html/draft-li-lsr-liveness Abstract: Prompt notification of the loss of node liveness or reachability is useful for restoring services in tunneled topologies. IGP summarization precludes remote nodes from directly observing the status of remote nodes. This document proposes a service that, in conjunction with the IGP, provides prompt notifications without impacting IGP summarization. The IETF Secretariat
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