272Configuration restrictions and guidelinesIPv6 MPLS L3VPN is mutually exclusive with EVI and VXLAN. For more information about EVI andVXLAN, see EVI Configuration Guide and VXLAN Configuration Guide.IPv6 MPLS L3VPN configuration task listTasks at a glance(Required.) Configuring basic IPv6 MPLS L3VPN(Optional.) Configuring inter-AS IPv6 VPN(Optional.) Configuring an OSPFv3 sham link(Optional.) Configuring BGP AS number substitution and SoO attribute(Optional.) Enabling logging for BGP route flappingConfiguring basic IPv6 MPLS L3VPNThe key task in IPv6 MPLS L3VPN configuration is to manage the advertisement of IPv6 VPN routeson the MPLS backbone, including management of PE-CE route exchange and PE-PE routeexchange.To configure basic IPv6 MPLS L3VPN:Tasks at a glanceConfiguring VPN instances:4. (Required.) Creating a VPN instance5. (Required.) Associating a VPN instance with an interface6. (Optional.) Configuring route related attributes for a VPN instance(Required.) Configuring routing between a PE and a CE(Required.) Configuring routing between PEs(Optional.) Configuring BGP VPNv6 route controlConfiguration prerequisitesBefore configuring basic IPv6 MPLS L3VPN, perform the following tasks:1. Configure an IGP on the PEs and P devices to ensure IP connectivity within the MPLSbackbone.2. Configure basic MPLS for the MPLS backbone.3. Configure MPLS LDP on PEs and P devices to establish LDP LSPs.Configuring VPN instancesBy configuring VPN instances on a PE, you isolate not only VPN routes from public network routes,but also routes between VPNs. This feature allows VPN instances to be used in MPLS L3VPNs andother network scenarios as well.All VPN instance configurations are performed on PEs or MCEs.
