This section provides information about the steps necessary to create shared risk link groups for primary/standby SRLG disjoint configuration and for FRR detours/bypass SRLG disjoint configuration. Non-CSPF manual bypass is not considered.
A typical application of the SRLG feature is to provide for an automatic placement of secondary backup LSPs or FRR bypass/detour LSPs that minimizes the probability of fate sharing with the path of the primary LSP (shown in the following figure).
Figure: Shared Risk Link Groups
This feature is supported on OSPF and IS-IS interfaces on which RSVP is enabled.