%% You should probably cite draft-lin-bfd-path-consistency-over-sr-04 instead of this revision. @techreport{lin-bfd-path-consistency-over-sr-03, number = {draft-lin-bfd-path-consistency-over-sr-03}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-lin-bfd-path-consistency-over-sr/03/}, author = {Changwang Lin and Weiqiang Cheng and Jiang Wenying and Ran Chen}, title = {{BFD Path Consistency over SR}}, pagetotal = 23, year = 2024, month = jul, day = 8, abstract = {Bidirectional Forwarding Detection (BFD) can be used to monitor paths between nodes. U-BFD defined in {[}I-D.ietf-bfd-unaffiliated-echo{]} can effectively reduce the device equipment. Seamless BFD (S-BFD) provides a simplified mechanism which is suitable for monitoring of paths that are setup dynamically and on a large scale network. In SR network, BFD can also be used to monitor SR paths. When a headend use BFD to monitor the segment list/CPath of SR Policy, the forward path of control packet is indicated by segment list, the reverse path of response control packet is via the shortest path from the reflector back to the initiator (headend) as determined by routing. The forward path and reverse path of control packet are likely inconsistent going through different intermediate nodes or links. This document describes a method to keep the forward path and reverse path consistent when using S-BFD or U-BFD to detect SR Policy}, }