Ethernet Virtual Private Line

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Ethernet Virtual Private Line (EVPL) is a Metro Ethernet service type defined by the Metro Ethernet Forum. It describes any E-Line Metro Ethernet service that permits service multiplexing at the Ethernet user-to-network interface (UNI).

Because E-Line services implement point-to-point Ethernet virtual connections (EVC), this service provides Metro Ethernet with a virtual circuit service that is analogous to that provided by frame relay and Asynchronous Transfer Mode (ATM). It permits a hub-and-spoke communication arrangement while requiring only a single UNI at the hub location. It can also support partial mesh and even full mesh communication arrangements.

Because there are multiple EVCs per UNI in an EVPL service, the EVC must be visible to the customer. To do this, the service provider expects customer traffic to have an appropriate 802.1p VLAN tag when submitted. The network will also deliver tagged traffic to that location so that the customer knows which EVC traffic is arriving from.

See Also

PodSnacks

<mp3>http://podcast.hill-vt.com/podsnacks/2007q4/mef_service_types.mp3%7Cdownload</mp3> | Metro Ethernet service types

Knowledge Nuggets

Metro Ethernet