Terms and Acronyms

circuit cross-connect (CCC)—A method of exchanging frames between two router interfaces running the same Layer 2 protocol, such as ATM, Cisco HDLC, Ethernet, extended VLAN, Frame Relay, and PPP. For more information about CCC, see the JUNOS Network Interfaces Configuration Guide.
translational cross-connect (TCC)—A Juniper Networks method of exchanging frames between two router interfaces running different Layer 2 protocols, such as ATM, Cisco HDLC, Ethernet, extended VLAN, Frame Relay, and PPP. For more information about TCC, see the JUNOS Network Interfaces Configuration Guide.
Layer 2.5 VPNs—A method of privately connecting sites across the Internet. Layer 2.5 VPNs function like Layer 2 VPNs, but connect two sites that use different Layer 2 protocols. For more information about Layer 2 VPNs, see the JUNOS VPNs Configuration Guide.
Layer 2.5 circuits—A method of privately connecting sites across the Internet. Layer 2.5 circuits function like Layer 2 circuits, but connect two sites that use different Layer 2 protocols. For more information about Layer 2 circuits, see Layer 2 Circuits or the JUNOS VPNs Configuration Guide.
provider edge router (PE)—Any router that connects customer edge (CE) routers to the provider core network.
customer edge router (CE)—Any router that connects a customer site to a PE router.
provider core router (P)—Any router that lies between PE routers in the provider core network.