Use this procedure to enable PM on d-group interface(s) or a LAG logical port containing two d-group interfaces. The PM functions include Loss Measurement and Delay Measurement, both proactive (continuous with 15-minute and 24-hour binning of results), and on-demand. Up-MEPs which are configured for the PM measurements may exist on any port, but the OAM PM traffic passes through the d-group interface(s). Down-MEPs may be configured for PM measurements only on the interface(s) enabled for Ethernet OAM PM. By default OAM PM is disabled.

You can only enable OAM PM on one or two d-group ports, or a LAG containing them, and when ethoam cfm is enabled. Specified individual ports cannot be members of a LAG. Once OAM PM is enabled, you cannot modify the port participation, nor can you change the configuration of mode dvlan-tunnel, spanning tree or ERP participation, nor LAG membership, on those ports, nor mtu-size on any port, without first disabling OAM PM. You cannot change VLAN participation on a port enabled for OAM PM if a Loss or Delay Measurement session is configured in that VLAN.

Disable is not allowed:

• If any MA has its CCM Interval set to under one (1) second.

• If p34mux is enabled.

• If a VLAN loopback with sada_handling set to 1 or 2 is configured on one of the ports.