Hi SPRING WG As co-author support adoption.
There’s been a few documents and examples now that relate to validity/eligibility/enablement to allow control of candidate path tunnel forwarding without explicating admin-down the candidate path - controlling the active state. This shows there’s a need, and this draft fills that need with a generic knob so we can define the knob once independent of the rules/behavior that act on the knob. Thanks Andrew From: Karboubi, Amal <[email protected]> Date: Wednesday, November 26, 2025 at 5:12 PM To: Alvaro Retana <[email protected]>, [email protected] <[email protected]>, [email protected] <[email protected]>, [email protected] <[email protected]> Subject: RE: [**EXTERNAL**] Call for adoption: draft-karboubi-spring-sr-policy-eligibility-04 (Ends 2025-12-16) CAUTION: This is an external email. Please be very careful when clicking links or opening attachments. See the URL nok.it/ext for additional information. Dear chairs and the WG, As an author, I support WG Adoption of this draft. It updates the active candidate path selection process defined in RFC9256 and provides a generic mechanism for an operator to embody their intent and any other conditions as part of the selection process using eligibility property which permits a path to be signaled and established as operationally up, but controls whether the path is eligible to carry traffic. There are various use cases that could benefit from this concept ranging from performance based conditions, minimum Number of SID list, "sticky" path constraint, maintenance, etc. Regards, -Amal. -----Original Message----- From: Alvaro Retana via Datatracker <[email protected]> Sent: Tuesday, November 25, 2025 5:14 PM To: [email protected]; [email protected]; [email protected] Subject: [**EXTERNAL**] Call for adoption: draft-karboubi-spring-sr-policy-eligibility-04 (Ends 2025-12-16) Subject: Call for adoption: draft-karboubi-spring-sr-policy-eligibility-04 (Ends 2025-12-16) This message starts a 3-week Call for Adoption for this document. Abstract: Segment Routing (SR) introduces new challenges for pinning candidate paths on their intended paths (the path the PCE computed based on provided intent and may have made bandwidth reservations on). The actual path through a network can change or no longer meet the required constraints if a SID list of an SR Policy candidate path is not fully expressed as a list of adjacency SIDs or when a change in the topology does happen. The introduction of the new candidate path eligibility concept permits a path to be signaled and established as operationally up, but controls whether the path is eligible to carry traffic, thus influencing its active state. The eligibility concept allows a system (operator, pce, headend, etc.) to set eligibility as false when path deviations may have occurred, or path constraints are no longer met for one or more SID lists of a candidate path and clear it when candidate path deviations are removed or constraints are met again. 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