Glossary - Cisco ASR1002 - ASR 1002 Router Software Configuration Manual

Configuring MPLS Layer 2 VPNs

Glossary

Glossary
ATM—Asynchronous Transfer Mode. A method of data transportation, whereby fixed-length packets
are sent over a switched network. The method's ability to ensure reliable delivery of packets at a high
rate makes it suitable for carrying voice, video, and data.
AToM—Any Transport over MPLS. AToM is a solution for transporting Layer 2 packets over an MPLS
backbone. AToM enables service providers to supply connectivity between customer sites with existing
data link layer (Layer 2) networks by using a single, integrated, packet-based network infrastructure—a
Cisco MPLS network. Instead of separate networks with separate network management environments,
service providers can deliver Layer 2 connections over an MPLS backbone.
EoMPLS—Ethernet over MPLS. This technology leverages an existing MPLS backbone network to
deliver Transparent LAN Services based on Ethernet connectivity to the customer site.
GEC—Gigabit EtherChannel. A high-performance Ethernet technology that provides gigabit per second
transmission rates. It provides a flexible and scalable bandwidth with resiliency and load sharing across
links for switches, router interfaces, and servers. Supports up to eight links per channel.
MPLS—Multiprotocol Label Switching. A mechanism in high-performance telecommunications
networks that directs and carries data from one network node to the next. MPLS makes it easy to create
virtual links between distant nodes. It can encapsulate packets of various network protocols.
VPLS—Virtual Private LAN Service. A method to provide Ethernet-based multipoint-to-multipoint
communication over IP and MPLS networks.
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