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LDP Session Alternates Between Up and Down States
Fault Description
An LDP session alternates between Up and Down states when you add, change, or delete the LDP GR timer, LDP authentication, LDP Keepalive timer, or LDP transport address.
Procedure
- Run the display this command in the LDP view to check whether
LDP GR or LDP MTU is configured.
- If the following information is displayed:
mpls ldp graceful-restart
LDP GR is configured. - If information similar to the following is displayed:
mpls ldp md5-password cipher 2.2.2.2 %#%#i@]DOR.^#F.'v8OauMuIclT]0\<CYVblIiE:Mj04%#%#ormpls ldp authentication key-chain peer 2.2.2.2 name kc1
LDP authentication is configured.
- Run the display this command in the interface view to check
whether the LDP Keepalive timer or LDP transport address is configured.
- If information similar to the following is displayed:
mpls ldp mpls ldp timer keepalive-hold 30
The LDP Keepalive timer is configured. - If information similar to the following is displayed:
mpls ldp mpls ldp transport-address interface
The LDP transport address is configured.
- After the preceding configurations are complete, wait for 10s and the LDP session becomes stable.