Cisco Systems A9014CFD Scalability Numbers, How to Configure IPv6 over Mpls 6PE and 6VPE, 37-6

Chapter 37 IPv6 over MPLS: 6PE and 6VPE

Scalability Numbers

Scalability Numbers

Table 37-1shows the scalability numbers for the 6PE and 6VPE feature.

Table 37-1	Scalability Numbers for 6PE and 6VPE
Interface		Numbers
Number of VRFs		113
Number of VPNv6 prefixes per VRF		About 40001
Number of VPNv6 prefixes		About 400037-1
Number of global IPv6 prefixes		About 400037-1

1.This number is limited by the MPLS label usage on the PE router. The maximum number of label space shared between IPv4 and IPv6 is 4000.

How to Configure IPv6 over MPLS: 6PE and 6VPE

This section describes how to configure IPv6 over MPLS: 6PE and 6VPE feature:

•Configuring 6PE, page 37-6(Required)

•Configuring 6VPE, page 37-9(Required)

•Verifying IPv6 over MPLS: 6PE and 6VPE Configuration, page 37-15(Optional)

Configuring 6PE

Ensure that you configure 6PE on PE routers participating in both the IPv4 cloud and IPv6 clouds. To learn routes from both clouds, you can use any routing protocol supported on IOS (BGP, OSPF, IS-IS, EIGRP, Static).

BGP running on a PE router should establish (IPv4) neighborhood with BGP running on other PEs. Subsequently, it should advertise the IPv6 prefixes learnt from the IPv6 table to the neighbors. The IPv6 prefixes advertised by BGP would automatically have IPv4-encoded-IPv6 addresses as the nexthop-address in the advertisement.

To configure 6PE, complete the following steps:

SUMMARY STEPS

1.enable

2.configure terminal

3.ip cef

4.ipv6 cef

5.ipv6 unicast-routing

6.router bgp as-number

7.no synchronization

8.no bgp default ipv4-unicast

	Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
37-6	OL-23826-09