12 E-LINE and E-LAN Connectivity Services
Connectivity Services
Ethernet Virtual Private LAN
(EVPLAN)
Ethernet Private Line (EPLAN) E-LAN
Ethernet Virtual Private Line
(EVPL) Ethernet Private Line (EPL) E-LINE
Shared
(Service Multiplexed)
Dedicated
(All to One Bundling)
Ethernet Service
Type
72 Chapter 2
Ethernet Private Line (EPL) Using E-LINE Service Type An Ethernet Private Line
(EPL) service is specified using an E-LINE service type. EPL uses a Point-to-Point EVC
between two UNIs and provides a high degree of transparency for service frames between
the UNIs it interconnects, such that the service frame??™s header and payload are identical
at both the source and destination UNI. The service also has an expectation of low frame
delay, frame delay variation, and frame loss ratio. It does not allow for service multiplexing
because a dedicated UNI (physical interface) is used for the service. Due to the amount of
transparency in this service, there is no need for coordination between the subscriber and
Service Provider on a detailed CE-VLAN ID/EVC map for each UNI because all service
frames are mapped to a single EVC at the UNI.
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