This feature supports FP2 and later and applies only to the 7450 ESS and 7750 SR.
To launch cpe-ping on an Epipe, all of the following must be true:
All SAPs on the Epipe must be provisioned on slots that are chassis mode D compatible.
If bound to a PBB tunnel, all SAPs on the B-VPLS must be provisioned on slots that are chassis mode D compatible.
If the Epipe or the B-VPLS (in the case of PBB Epipe) uses SDP-bindings, the system configuration must be network chassis mode D compatible.