Topology is below. 3 Hybrid MSTP NEs connected as link
configure ETH service on PW between NE1 and NE3, NE1 and NE3 report MPLS_PW_LOCV alarm.
1. Check any phsical damage on fiber,check any abnormal alarm about laser or port.
Check physical fiber connection, make sure no wrong connection happened.
2. Check PW label configured site by site.
3. Query PW OAM parameter on both sites, NE1 site configured CV mode, NE3 use FFD, problem point found.
4. Change OAM parameter on NE1 to FFD 3.3ms, the same with NE3,alarm disappear. traffic recover
Reason1: Physical link down,or wrong link connection
Reason2: PW configuration wrong.
Reason3: PW configuration wrong.OAM parameters on both sites mismatch
All PW OAM parameter should be the same on LSP,wrong configuration would impact traffic.