304# Configure interface Loopback 0 and start IS-IS on it.[PE2] interface loopback 0[PE2-LoopBack0] ip address 5.5.5.9 32[PE2-LoopBack0] isis enable 1[PE2-LoopBack0] quit# Create VPN instance vpn1 and configure the RD and route target attributes.[PE2] ip vpn-instance vpn1[PE2-vpn-instance-vpn1] route-distinguisher 12:12[PE2-vpn-instance-vpn1] vpn-target 3:3 import-extcommunity[PE2-vpn-instance-vpn1] vpn-target 3:3 export-extcommunity[PE2-vpn-instance-vpn1] quit# Bind the interface connected with CE 2 to the created VPN instance.[PE2] interface vlan-interface 12[PE2-Vlan-interface12] ip binding vpn-instance vpn1[PE2-Vlan-interface12] ip address 20.0.0.1 8[PE2-Vlan-interface12] quit# Start BGP on PE 2.[PE2] bgp 600# Configure IBGP peer 4.4.4.9 as a VPNv4 peer.[PE2-bgp] peer 4.4.4.9 as-number 600[PE2-bgp] peer 4.4.4.9 connect-interface loopback 0[PE2-bgp] ipv4-family vpnv4[PE2-bgp-af-vpnv4] peer 4.4.4.9 enable[PE2-bgp-af-vpnv4] quit# Redistribute direct routes to the VPN routing table of vpn1.[PE2-bgp] ipv4-family vpn-instance vpn1[PE2-bgp-vpn1] import-route direct[PE2-bgp-vpn1] quit[PE2-bgp] quit5. Verify your configuration:Ping PE 1 from PE 2 and ping PE 2 from PE 1. They can ping each other successfully.[PE2] ping –vpn-instance vpn1 30.0.0.1[PE1] ping –vpn-instance vpn1 20.0.0.1Configuring inter-AS option CNetwork requirements• Site 1 and Site 2 belong to the same VPN. Site 1 accesses the network through PE 1 in AS 100 andSite 2 accesses the network through PE 2 in AS 600.• PEs in the same AS run IS-IS.• PE 1 and ASBR-PE 1 exchange labeled IPv4 routes by MP-IBGP.• PE 2 and ASBR-PE 2 exchange labeled IPv4 routes by MP-IBGP.• PE 1 and PE 2 are MP-EBGP peers.• ASBR-PE 1 and ASBR-PE 2 use their respective routing policies and label the routes received fromeach other.
