cmEthernetTrafficPortIngressPushPVIDEnabled is a read-write boolean specifying whether this port's configured PVID value is pushed onto untagged ingress frames, applicable only for connection-oriented EVPL service. An administrator enables this when untagged customer frames need to be tagged with a specific VLAN internally so they can be carried alongside other tagged services through the same EVPL infrastructure. For example, a customer sending untagged Ethernet frames into an EVPL service that must be identified by a specific internal VLAN would have this object enabled so the port's PVID is pushed onto those frames on ingress.