H-Vpls With Ethernet Q-In-Q Access - Cisco ASR 903 Manual

▀ H-VPLS with Ethernet Q-in-Q Access

interface GigabitEthernet0/0/7
service instance 2 ethernet evc30
encapsulation dot1q 30
bridge-domain 30
H-VPLS with Ethernet Q-in-Q Access
In a flat or non-hierarchical VPLS configuration, a full mesh of pseudowires (PWs) is needed between all PE
nodes. Hierarchical Virtual Private LAN Service (H-VPLS) reduces both signaling and replication overhead by
using a combination of full-mesh and hub-and-spoke configurations.
In the example below, U-PE device will add S-Tag 30 on top of customer vlan 10. N-PE device is only aware of S-
TAG 30.
U-PE(ASR903)
! To CE interface, C- tag 10
interface GigabitEthernet0/0/2
service instance 1 ethernet
encapsulation dot1q 10
bridge-domain 10
! Interface to N-PE
! S-TAG 30 is added on top of C-tag 10
interface GigabitEthernet0/0/1
service instance 3 ethernet
encapsulation dot1q 30 second-dot1q 10
▄ Cisco ASR 903 Router Design and Deployment Guide
72
Figure 12. H-VPLS with Ethernet Q-in-Q Access
Virtual Private LAN Service - VPLS
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