IGP Flexible Algorithm, February 2023
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- PROPOSED STANDARD
- P. Psenak, Ed.
- lsr (rtg)
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IGP protocols historically compute the best paths over the network based on the IGP metric assigned to the links. Many network deployments use RSVP-TE or Segment Routing - Traffic Engineering (SR-TE) to steer traffic over a path that is computed using different metrics or constraints than the shortest IGP path. This document specifies a solution that allows IGPs themselves to compute constraint-based paths over the network. This document also specifies a way of using Segment Routing (SR) Prefix-SIDs and SRv6 locators to steer packets along the constraint-based paths.
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.