305
[PE2-Vlan-interface11] quit
# 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] quit
5. Verify the configuration:
Ping PE 1 from PE 2 and ping PE 2 from PE 1. They can ping each other:
[PE2] ping –vpn-instance vpn1 30.0.0.1
[PE1] ping –vpn-instance vpn1 20.0.0.1
Configuring inter-AS option C
Network requirements
Site 1 and Site 2 belong to the same VPN. Site 1 accesses the network through PE 1 in AS 100 and Site
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 from each
other.
ASBR-PE 1 and ASBR-PE 2 use MP-EBGP to exchange labeled IPv4 routes.
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