Transition Networks
S4224 Web User Guide
33558 Rev. C
Page 293 of 669
Configuration > Ethernet Services > EVCs
The
Configuration
>
Ethernet
Services
>
EVCs
menu path displays current EVC configurations. The
EVC settings can also be configured here. On this system, only Provider Bridge based EVCs are
supported.
Figure 8. Provider Bridge E-LINE Service
The EVC (Ethernet Virtual Connection) is an association of two or more UNIs that limits the exchange of
frames to UNIs in the Ethernet Virtual Connection. The User Network Interface (UNI) is the physical
interface or port that is the demarcation between the customer and the service provider/Cable
Operator/Carrier/MSO. The UNI is the physical demarcation point between the responsibility of the
Service Provider and the responsibility of the Subscriber.
MEF Ethernet Virtual Connection Types
The Metro Ethernet Forum (MEF) specifies these EVC (Ethernet Virtual Connection) types:
E-Line
EVC: Point-to-point Service Ethernet Private Line (EPL) allows only one EVC per UNI port, while
Ethernet Virtual Private Line (EVPL) allows multiple EVCs per UNI port. The figure below shows a
Provider Bridge E-LINE service example.
Figure 9. Provider Bridge E-LINE Service
E-LAN
EVC: Multipoint Service Ethernet Private LAN (EP-LAN) allows only one EVC per UNI port, while
Ethernet Virtual Private LAN (EVP-LAN) allows multiple EVCs per UNI port. This is a bridged service.
E-TREE
EVC: Rooted Multipoint Service Ethernet Private Tree (EP-TREE) allows only one EVC per UNI
port, while Ethernet Virtual Private Tree (EVP-TREE) allows multiple EVCs per UNI port. This is a bridged
service where the root port has access to all the leaf ports, but the leaf ports only have access to the root
port.