PRELIMINARY
Ethernet Functions
• Multipoint-to-Multipoint EVC (E-LAN)
Point-to-Point EVC (E-Line)
In a Point-to-Point EVC, also known as E-Line, exactly two UNIs are associated
with one another through the EVC. Service frames are transferred between
them. Figure 7 illustrates two Point-to-Point EVCs.
Metro
Ethernet
Network
EVC1
Customer
Edge
EVC2
Customer
Edge
12566
Figure 7 Point to Point EVC
Multipoint-to-Multipoint EVC (E-LAN)
In a Multipoint-to-Multipoint EVC, also known as E-LAN, two or more UNIs are
associated with one another through the EVC. It allows unicast, broadcast and
multicast service frames to be transferred from one ingress UNI to one or more
egress UNIs.
Figure 8 illustrates a Multipoint-to-Multipoint EVC.
Metro
Ethernet
Network
Customer
Edge
Customer
Edge
Customer
Edge
12567
Figure 8 Multipoint to Multipoint EVC
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1/22102-HRA 901 17/9 Uen PU1 | 2016-07-04
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