Label Distribution Protocol 
470
MPLS Guide
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Use subject to Terms available at: www.nokia.com
3HE 18686 AAAB TQZZA
 
If the FEC gets resolved before the tunnel-down-damp-time timer expires, LDP programs 
the IOM with the new NHLFE and posts a tunnel modify event to the TTM, updating the 
dampened entry in the TTM with the new NHLFE information. 
If the FEC does not get resolved and the tunnel-down-damp-time timer expires, LDP posts 
a tunnel down event to the TTM, which deletes the LDP tunnel.
The no form of the command resets the damp timer value back to the default value of 3. If 
the timer value is set to 0, tunnel down events are not dampened but are reported 
immediately.
Default 3
Parameters seconds — the time interval that LDP waits before posting a tunnel down event to the 
TTM
Values 0 to 20