Ipv6 On The Provider Edge And Customer Edge Routers - Cisco CRS Configuration Manual

Implementing IPv6 VPN Provider Edge Transport over MPLS
• IPv6 introduction into an existing MPLS service—6PE/VPE routers can be added at any time.
• It is possible to switch up to OC-192 speed in the core.

IPv6 on the Provider Edge and Customer Edge Routers

Service Provider Edge Routers
6PE is particularly applicable to service providers who currently run an MPLS network. One of its advantages
is that there is no need to upgrade the hardware, software, or configuration of the core network, and it eliminates
the impact on the operations and the revenues generated by the existing IPv4 traffic. MPLS is used by many
service providers to deliver services to customers. MPLS as a multiservice infrastructure technology is able
to provide layer 3 VPN, QoS, traffic engineering, fast re-routing and integration of ATM and IP switching.
Customer Edge Routers
Using tunnels on the CE routers is the simplest way to deploy IPv6 over MPLS networks. It has no impact
on the operation or infrastructure of MPLS and requires no changes to the P routers in the core or to the PE
routers. However, tunnel meshing is required as the number of CEs to connect increases, and it is difficult to
delegate a global IPv6 prefix for an ISP.
The following figure illustrates the network architecture using tunnels on the CE routers.
Figure 24: IPv6 Using Tunnels on the CE Routers
Cisco IOS XR Virtual Private Network Configuration Guide for the Cisco CRS Router, Release 6.1.x
IPv6 on the Provider Edge and Customer Edge Routers
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