Understanding LSP Status Events

Label-switched path (LSP) status events occur in the history log of the show mpls lsp extensive command output, and provide detailed information that can help pinpoint the problem with an LSP. This chapter lists and describes many LSP status events. Descriptions generally include sample output of the LSP event, an explanation of what the event means, the possible cause of the event, and any possible actions that you can take. The LSP events are organized alphabetically. (See Table 5.)

Table 5: Checklist for Understanding LSP Status Events

Understanding LSP Status Events Tasks	Possible Action or Command
Displaying LSP Status Events	`show mpls lsp extensive`
Call Was Cleared by RSVP Event	Not applicable.
Change in Active Path Event	Not applicable.
Clear Call Event	Not applicable.
Deselected as Active Event	Analyze this event, and refer to events on either side of this event to determine the appropriate action.
Down Event	Analyze this event, and refer to events on either side of this event to determine the appropriate action.
Fast Reroute Detour Down Event	Analyze this event, and refer to events on either side of this event to determine the appropriate action.
Fast Reroute Detour Up Event	Not applicable.
Link Protection Down Event	Include the `family mpls` statement for all alternate paths for the LSP at the `[edit interfaces type-fpc/pic/port.unit]` hierarchy level.
Link Protection Up Event	Not applicable.
Originate Call Event	`[edit protocols rsvp] set traceoptions file rsvp.log set traceoptions flag packets` `file show /var/log/rsvp.log`
Originate Make-Before-Break Call Event	Not applicable.
Record Route Event	Not applicable.
ResvTear Received Event	Analyze this event, and refer to events on either side of this event to determine the appropriate action.
RSVP Disabled Event	`[edit protocols] activate rsvp` `[edit protocols rsvp] set interface` `type-fpc/pic/port`
RSVP Error Event	`[edit protocols] activate rsvp`
Selected as Active Path Event	Not applicable.
Session Preempted Event	Not applicable.
Up Event	Not applicable.