PW status signaling is common in dynamic PWs established through T-LDP signaling, but there is no mechanism to signal the status of PW (and various associated faults) in BGP signaled PW in BGP-AD VPLS environment. In hybrid multi-segmented environments e.g. in hierarchical networks where the ownership of different segments of the NW, and hence underlying signaling methods, lies with different operators and/or administrators, end-to-end fault signaling becomes problematic). It is propose that L2VPN Pseudowire status can be sent for BGP-AD VPLS signaled pseudowires as a solution for this problem.
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Anonymous, "L2VPN Pseudowire status notification in BGP-AD VPLS Environment", Technical Disclosure Commons, (March 09, 2022)