Y.1731 functionality extended to Down MEPS

Y.1731 LMM/LMR to Ethernet interfaces is extended to Point-to-Point Down MEPs (Maintenance Entity Group End Points), as defined in IEEE 802.1ag over VPWS. To display the iterator output for an LM session, run the following command from the network interfaces hierarchy: show oam ethernet connectivity-fault-management sla-iterator-statistics sla-iterator <profile> maintenance-domain <MA> local-mep <MEP> remote-mep <RMEP>.