Failure-action down

The failure-action down command is supported for point-to-point RSVP (including mesh point-to-point and one-hop point-to-point auto-LSPs) and LDP LSPs. This command is configured within the config>router>mpls>lsp>bfd, config>router>mpls>lsp-template>bfd, or config>router>ldp>lsp-bfd contexts. For RSVP LSPs, it is only supported at the LSP level and not at the primary or secondary path levels. When configured, an LSP is made unavailable as a transport if BFD on the LSP goes down.

If BFD is disabled, MPLS installs the LSP as ‟usable” in the TTM. The failure-action configuration is ignored.

If BFD is enabled and no failure-action is configured, MPLS installs the LSP as ‟usable” in the TTM regardless of the BFD session state. BFD generates BFD Up and BFD Down traps.

If BFD is enabled and failure-action down is configured:

Note:

BFD session state is never used to trigger a switch of the active path when failure-action down is configured.