- FEC – Forwarding Equivalent Class.
- LSP – Label Switched Path
- LSR – Label Switched Router
- LDP – Label Distribution Protocol
- RSVP-TE – Resource Reservation Protocol with Traffic Engineering
- PW – Pseudowire
- CSPF – Constraint Shortest Path First
- FRR -Fast Reroute
- VPRN – Virtual Private Routed Network
- VSI – Virtual Switching Instance.
- SDP – Service Destination Point
- VRF – Virtual Routing Forwarder
- EFM OAM – Ethernet in First Mile Operation, Administration and Maintenance (802.3ah)
- CFM – Connectivity Fault Management (802.1ag)
- C-SA – customer source address
- C-DA – customer destination address
- BUM – broadcast, unknown unicast and multicast
- ALSRP – Alcatel-Lucent Service Router Portfolio
- ECMP – Equal Cost Multi-Path
- TLV – Type-Length-Value
- CR-LDP – Constraint-based Routed Label Distribution Protocol
- PWE3 – Pseudowire Emulation Edge-to-Edge
- POS – Packet Over SDH/SONET
- PSN – packet-switched network\
- TLS – Transparent LAN Service
- LCCE – L2TP Control Connection Endpoints
