More detailed analysis
For a more detailed analysis a user can issue the debug ldp command. If there are more
sessions, there will be more prints to the console and user needs to filter this information by
the ldp-id of the particular session to debug. The ldp-id will be printed in the debugs and can
be
cross checked with the show command. For LDP start with debug ldp events - this will
give all the events of LDP. Make sure the protocol messages are sending out and receiving.
Make sure the state machine is working by issuing debug ldp fsm. For further filtering,
depending on the router type like upstream, down stream, transient, a user can issue the
commands debug ldp usm, debug ldp dsm, and debug ldp tsm. Make sure the finite
Troubleshooting an MPLS problem
116 Troubleshooting August 2013
Comments? infodev@avaya.com
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