Hello Devang,

in the feature navigator look for the 6VPE feature for example a C7609 with sup720 3BXL and IOS 12.2(33)SxHa2 has the vpnv6 address-family.

see for example

http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-ov_mpls_6vpe.html

you still need an MPLS/Ipv4 core or an ipv4 core if using GRE tunnels:

Table 1 Feature Information for Implementing IPv6 VPN over MPLS

Feature Name Releases Feature Information

IPv6 VPN over MPLS (6VPE)

12.2(28)SB

12.2(33)SRB

12.4(20)T

The IPv6 VPN (6VPE) over a MPLS IPv4 core infrastructure feature allows ISPs to offer IPv6 VPN services to their customers.

This entire document provides information about this feature.

MPLS VPN 6VPE support over IP tunnels

12.2(33)

SRB1

This feature allows the use of IPv4 GRE tunnels to provide IPv6 VPN over MPLS functionality to reach the BGP next hop.

This following sections provide information about this feature:

•6VPE Over GRE Tunnels

Hope to help

Giuseppe