
Chapter 4: Feature Description
Ethernet Features
Layer 2 service in which each UNI is dedicated to the EP-LAN service. A typical use case for EP-
LAN services is Transparent LAN.
The following figure shows an example of an EP-LAN service in which the service is defined to
provide Customer Edge VLAN (CE-VLAN) tag preservation and tunneling for key Layer 2 control
protocols. Customers can use this service to configure VLANs across the sites without the need to
coordinate with the service provider. Each interface is configured for All-to-One Bundling, which
enables the EP-LAN service to support CE-VLAN ID preservation. In addition, EP-LAN supports CE-
VLAN CoS preservation.
Figure 30 MEF Ethernet Private LAN Example
Ethernet Virtual Private LAN Service
Customers often use an E-LAN service type to connect their UNIs in an MEN, while at the same
time accessing other services from one or more of those UNIs. For example, a customer might
want to access a public or private IP service from a UNI at the customer site that is also used to
provide E-LAN service among the customer’s several metro locations. The Ethernet Virtual Private
LAN (EVP-LAN) service is defined to address this need. EVP-LAN is actually a combination of EVPL
and E-LAN.
Bundling can be used on the UNIs in the Multipoint-to-Multipoint EVC, but is not mandatory. As
such, CE-VLAN tag preservation and tunneling of certain Layer 2 control protocols may or may not
be provided. Service multiplexing is allowed on each UNI. A typical use case would be to provide
Internet access a corporate VPN via one UNI.
The following figure provides an example of an EVP-LAN service.
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