H-Vpls With Ethernet Access Qinq Or Qinany; H-Vpls With Pw-Access - Cisco CRS Configuration Manual

Implementing Multipoint Layer 2 Services
edge offers significant technical and economic advantages. H-VPLS also allows Ethernet point-to-point and
multipoint Layer 2 VPN services, as well as Ethernet access to high-speed Internet and IP VPN services.
Two flavors of H-VPLS are:
• Ethernet access in the edge domain
• MPLS access in the edge domain

H-VPLS with Ethernet Access QinQ or QinAny

The following figure shows the Ethernet access for H-VPLS. The edge domain can be built using Ethernet
switches and techniques such as QinQ. Using Ethernet as the edge technology simplifies the operation of the
edge domain and reduces the cost of the edge devices.
Figure 12: Ethernet Access for H-VPLS

H-VPLS with PW-access

The following figure shows the pseudowire (PW) access for H-VPLS. The edge domain can be an MPLS
access network. In this scenario, the U-PE device carries the customer traffic from attachment circuits (AC)
over the point to point (p2p) pseudowires. The p2p pseudowires terminate in a bridge domain configured on
the N-PE device.
Cisco IOS XR Virtual Private Network Configuration Guide for the Cisco CRS Router, Release 6.1.x
Multipoint Layer 2 Services Overview
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