Before configuring the route reflection for BGP VPNv6 routes, complete the following tasks:
Enable IPv6 globally on the PE, and enable IPv6 on the interfaces that need be configured with IPv6.
Configure the routing protocol for the MPLS backbone network to implement IP connectivity between devices in the backbone network.
Establish tunnels (LSPs or MPLS TE tunnels) between the RR and all PEs serving as the clients.