1-36Refer to Configuring Basic MPLS L3VPN.In the inter-provider VPN option A solution, for the same VPN, the VPN targets for the VPN instances ofthe PEs must match those for the VPN instances of the ASBR-PEs in the same AS. It is not required forPEs in different ASs.Configuring Inter-Provider VPN Option BFollow these steps to configure inter-provider VPN option B on ASBR PEs:To do… Use the command… RemarksEnter system view system-view —Enter interface view for theinterface connecting to theremote ASBR-PEinterface interface-typeinterface-number —Configure the IP address of theinterfaceip address ip-address { mask |mask-length } RequiredReturn to system view quit —Enter BGP view bgp as-number —Enter BGP-VPNv4 subaddressfamily view ipv4-family vpnv4 —Disable VPN target filtering forVPNv4 routes undo policy vpn-targetRequiredBy default, PE performs VPNtarget filtering of the receivedVPNv4 routes.The routes surviving thefiltering will be added to therouting table, and the othersare discarded.In the inter-provider VPN option B solution, the ASBR PEs need to maintain all VPNv4 routinginformation and advertise the information to peer ASBR PEs. In this case, the ASBR PEs must receiveall VPNv4 routing information without performing VPN target filtering.In the inter-provider VPN option B solution, for the same VPN, the VPN targets for the VPN instances ofthe PEs must match those for the VPN instances of the ASBR-PEs in the same AS. This is true for PEsin different ASs.
