Symptom:
VPLS PW imposition traffic dropped on egress LC/NP due to ECMP/bundle load-balance type wrong. The impacted traffic is flooding/multicasting traffic. Unicast traffic is not impacted.

Conditions:
When "load-balancing flow [src-dst-mac|src-dst-ip]" is configured in L2VPN, the VPLS PW data plane has hit the error condition in which some PWs do VC-label hashing and others do flow based hashing. 
This condition causes inconsistency between ingress LC and egress LC in handling PW imposition traffic ECMP/bundle load-balancing. In the worse case, traffic is dropped on egress LC.

The traffic loss symptom cannot be triggered by moving the port around or adding/deleting ports.  It can happen after LC reload or l2vpn loandbalance configuration changes.