Seamless BFD (S-BFD) is a form of BFD that requires significantly less state and reduces the need for session bootstrapping as compared to LSP BFD. For more information, refer to ‟Seamless Bidirectional Forwarding Detection (S-BFD)” in 7450 ESS, 7750 SR, 7950 XRS, and VSR OAM and Diagnostics Guide. S-BFD also requires centralized configuration for the reflector function, as well as a mapping at the head-end node between the remote session discriminator and the IP address for the reflector by each session. This configuration and the mapping are described in the 7450 ESS, 7750 SR, 7950 XRS, and VSR OAM and Diagnostics Guide. This user guide describes the application of S-BFD to SR-TE LSPs, and the LSP configuration required for this feature.
S-BFD is supported in the following SR objects or contexts:
PCC-Initiated:
SR-TE LSP level
SR-TE primary path
SR-TE secondary and standby path
PCE-Initiated SR-TE LSPs
SR-TE auto-LSPs