Terms and Acronyms

Layer 2 circuit—A method of transporting Layer 2 frames between provider edge (PE) routers across an MPLS backbone using LDP signaling.
circuit cross-connect (CCC)—A Juniper Networks method of exchanging frames between one router interface running a Layer 2 protocol and another router interface using the same Layer 2 protocol. For more information about CCC, see either the JUNOS Network Interfaces Configuration Guide or the JUNOS MPLS Applications Configuration Guide.
control word—A 32-bit field used in Layer 2 circuits to transport sequence information, Layer 2 media control information, and padding.