3Com Switch 8800 Configuration Guide Chapter 37 BGP/MPLS VPN Configuration37-56[PE3-bgp-af-vpn-instance] import-route direct[PE3-bgp-af-vpn-instance] import-route static[PE3-bgp-af-vpn-instance] group 192 external[PE3-bgp-af-vpn-instance] peer 192.168.13.2 group 192 as-number 65003[PE3-bgp-af-vpn-instance] quit[PE3-bgp] quitSet up MP-EBGP adjacency between PE3 and CE4, import intra-CE4 VPN routeslearned into VPN-instance3.2.[PE3-bgp] ipv4-family vpn-instance vpn-instance3.2[PE3-bgp-af-vpn-instance] import-route direct[PE3-bgp-af-vpn-instance] import-route static[PE3-bgp-af-vpn-instance] group 232 external[PE3-bgp-af-vpn-instance] peer 192.168.23.2 group 232 as-number 65004[PE3-bgp-af-vpn-instance] quit[PE3-bgp] quitBind the interface connecting PE3 and CE3 to VPN-instance3.1 and the interfaceconnecting PE3 and CE4 to VPN-instance 3.2.[PE3] vlan 311[PE3-vlan311] port gigabitethernet 3/1/1[PE3-vlan311] quit[PE3] interface Vlan-interface 311[PE3-Vlan-interface311] ip binding vpn-instance vpn-instance3.1[PE3-Vlan-interface311] ip address 192.168.13.1 255.255.255.0[PE3-Vlan-interface311] quit[PE3] vlan 314[PE3-vlan314] port gigabitethernet 3/1/4[PE3-vlan314] quit[PE3] interface Vlan-interface 314[PE3-Vlan-interface314] ip binding vpn-instance vpn-instance3.2[PE3-Vlan-interface314] ip address 192.168.23.1 255.255.255.0[PE3-Vlan-interface314] quit37.4.6 Cross-domain BGP/MPLS VPN Configuration ExampleI. Network requirementsA VPN subscriber has sites in both city A and B. Because of the geographical reason,site in City A accesses to the MPLS/VPN network of service provider in City A, and getsAS100 as the AS number; site in City B accesses to the MPLS/VPN network of serviceprovider in City B, and gets AS200 as the AS number. The VPN goes through two ASs.CE1 and CE2 belong to VPN-A, while CE3 and CE4 belong to VPN-B.
