Session Date/Time: 25 Jul 2023 20:00

lsvr

Summary

The lsvr working group meeting at IETF 117 covered several key topics including document status updates, a new SD-WAN use case for BGP SPF, and future directions for the working group, including a potential recharter. Discussions focused on the relationship between BGP SPF, BGPLS, and the broader routing landscape, raising questions about functional splits and coordination with other working groups.

Key Discussion Points

Document Status: Updates were provided on the core protocol specification, applicability statement, BGP LS Yang model, and individual drafts like BGP SPF for SD-WAN and the implementation report.
L3DL Drafts: The expired L3DL drafts were discussed, with a decision to refresh them and formally include them in a recharter.
BGP SPF for SD-WAN: A presentation introduced a new use case for BGP SPF in multi-segment SD-WAN, sparking debate on charter relevance and potential implications for the working group's scope.
Yang Model Discussion: Whether to keep BGP-LS and LS SPF in one Yang document or to split them in two.
Rechartering: The need to review and potentially revise the working group charter was highlighted, considering L3DL work and the evolving landscape of BGP SPF applications.
Functional Split & Coordination: A broader discussion ensued regarding the potential for functional splits in LS-related work, specifically the division between IDR and LSVR. Concerns were raised about expertise overlap and the need for strong communication between working groups.
Implementation Spec: There was general consensus that this document should be adopted into the working group.

Decisions and Action Items

Refresh L3DL Drafts: Randy will refresh the L3DL drafts.
Start Recharter Discussions: The working group will begin discussions on rechartering, aiming to have a draft proposal ready by the next Prague IETF meeting.
Review BGP SPF Base Spec: Hangshi will review the BGP SPF base spec to identify areas of leverage and new additions.
Hold Cross-WG Discussion: Routing ADs and chairs from IDR, LSVR, and potentially TEAS/SPRING will convene to discuss functional splits and coordination strategies for LS-related work.

Next Steps

Authors to submit version 27 of BGP-SPF core protocol specification taking into account comments from Alvaro and other sources
Authors to address open issues and AC's comments on the BGP-LS Yang model.
Continue discussions on the mailing list regarding charter revisions and functional splits.
Coordinate a meeting between relevant ADs and WG chairs to discuss functional splits.