secondary srlg-disjoint
Use this command to set how to avoid the SRLGs (Shared Risk Link Groups) of a protected primary.
A fast-reroute/secondary path for an LSP that is disjoint from the primary ensures that a single point of failure on a particular link does not bring down both the primary and secondary paths in the LSP.
Note: The SRLG option configured in RSVP-TRUNK mode (this command) takes higher preference than the option configured in RSVP router mode (see 'srlg-disjoint').
Use the no form of this command to not avoid the SRLGs of a protected interface.
Command Syntax
secondary srlg-disjoint (forced|preferred)
no secondary srlg-disjoint
Parameters
forced
The router does not create the secondary/backup tunnel unless it avoids SRLGs of the primary-path/protected-interface.
preferred
With two explicit paths, the first explicit path tries to avoid the SRLGs of the primary-path/ protected interface. If that does not work, the secondary/backup tunne uses the second path (which ignores SRLGs).
Command Mode
RSVP -TRUNK mode
Example
#configure terminal
(config)#rsvp-trunk t1
(config-rsvp)# secondary srlg-disjoint forced
Last modified date: 07-13-2023