Alcatel-Lucent 7750 SR - VPLS Packet Walkthrough; Figure 57: VPLS Service Architecture

Page 420 7750 SR OS Services Guide
VPLS Packet Walkthrough
This section provides an example of VPLS processing of a customer packet sent across the
network (Figure 57) from site-A, which is connected to PE-Router-A, to site-B, which is
connected to PE-Router-C (Figure 58).
Figure 57: VPLS Service Architecture
1. PE-Router-A (Figure 58)
a. Service packets arriving at PE-Router-A are associated with a VPLS service instance based
on the combination of the physical port and the IEEE 802.1Q tag (VLAN-ID) in the packet.
PE D
PE C
IP/MPLS
Network
VPLS Service1
LSP Full-mesh
VPLS Service1
Virtual
Bridge
PE A
PE B
OSSG201
B
B
B
B
B
B
B