LSP Event
ResvTear received
Sample Output
user@R1> show mpls lsp extensive [...Output truncated...] 23 Dec 28 13:46:39 CSPF failed: no route toward 10.0.0.6 22 Dec 28 13:46:39 Clear Call 21 Dec 28 13:46:39 ResvTear received 20 Dec 28 13:46:39 Down 19 Dec 28 13:46:39 10.1.13.2: Session preempted 18 Dec 28 13:42:07 Selected as active path [...Output truncated...]
Meaning
This LSP event indicates that an RSVP ResvTear message was received. ResvTear messages remove RSVP reservation states along a path. These messages travel upstream toward senders of the session. This message usually appears in the middle of a run of messages that tear the LSP down.
Cause
In some cases, an ResvTear event is received because a router’s reservation state times out. In other cases, when the downstream link fails, the upstream node must eliminate all RSVP states and initiates a ResvTear event. If you are running Fast ReRoute, the upstream node initiates a PathErr message, not a ResvTear message. It is beyond the scope of this document to include all possible reasons for an ResvTear event.
Action
Analyze the status to determine if this is the required behavior. If this is not the required behavior, verify the surrounding LSP events to identify the cause of the problem.
