Session Date/Time: 09 Nov 2023 14:00

lsvr

Summary

The LSVR working group meeting focused on the status of existing drafts, including the BGP-LS specification, YANG model, and updates to NRI election rules. A key discussion point was the re-chartering of the working group and its future direction. Several proposed updates and extensions to the BGP-LS protocol were presented, particularly regarding its application in multi-segment SD-WAN scenarios.

Key Discussion Points

BGP-LS Draft Status: The authors are working on changes based on the shepherd review, aiming for a new working group last call after incorporating feedback.
BGP-LS YANG Model: Updates include support for BGP-LS attributes, with ongoing work to improve the representation of nested TLVs. Discussion revolved around leveraging existing IGP models for inspiration.
Multi-Segment SD-WAN with BGP-LS: Proposed extensions to BGP-LS to support SD-WAN use cases, including the advertisement of link types and consideration of link quality requirements. There was a suggestion to consider using affinity/link colors instead of introducing a new TLV for link type.
BGP-LS NRI Election Rules: Proposed updates to address convergence delays, redundant advertisements, and non-deterministic selection. The discussion focused on whether these updates should be incorporated into the base specification or maintained in a separate document.
Working Group Re-chartering: Discussion on the future direction of the working group, considering new application spaces and the level of active participation. Key topics included potential extensions for L3DoS, protocol maintenance, and BGP-LS applications. There was agreement that the chairs should create and circulate a draft charter amendment.

Decisions and Action Items

Action Item: Authors of the BGP-LS draft to incorporate feedback from the shepherd review and prepare for a new working group last call.
Action Item: Authors of the BGP-LS YANG model to investigate the OSPF model's handling of TLVs and sub-TLVs for potential adoption in the BGP-LS model.
Decision: Updates to BGP-LS NRI election rules should be maintained in a separate document, rather than being merged into the base specification at this time.
Action Item: Chairs to create and circulate a draft amended working group charter for review and feedback, focusing initially on protocol maintenance and extensions like L3DoS.

Next Steps

The chairs will solicit feedback on the list.
A draft revised charter will be posted and reviewed, targeting completion before the end of the year.
Authors will work on updating the relevant drafts based on meeting discussions.