Section 5.3 of draft-bashandy-rtgwg-segment-routing-ti-lfa describes protecting SR policy midpoints against node failure for the case where the active segment is the prefix or adjacency segment of a neighbor.
I believe the steps described in the procedure is applicable only for a node steering packets into the SR policy. This could be an ingress PE steering IP packets into a SR-TE tunnel or an intermediate node steering labeled packets received with a BSID into a SR-TE tunnel identified by that BSID. A transit node that has no idea about the SR policy itself is not expected to perform the procedure described in that section. Is my understanding correct? Regards, Muthu
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