3com 3031 Instruccion De Instalación

[PE3-bgp-af-vpn-instance]quit

[PE3-bgp]quit

c Bind the interface connecting PE3 and CE3 with VPN-instance 2. 

[PE3]interface ethernet 1/0/0

[PE3-Ethernet1/0/0]ip binding vpn-instance vpn-instance2

[PE3-Ethernet1/0/0]ip address 172.18.0.1 255.255.0.0

[PE3-Ethernet1/0/0]quit

d Configure loopback interface.

[PE3]interface loopback 0

[PE3-LoopBack0]ip address 33.1.1.1 255.255.255.255

[PE3-LoopBack0]quit

e Set up MP-IBGP adjacency between PE3 and PE1 to exchange intra-PE VPN 

routing information, activate MP-IBGP peer in VPNv4 address family view. 

[PE3] bgp 100

[PE3-bgp] group 11

[PE3-bgp] peer 11.1.1.1 group 11 

[PE3-bgp] peer 11.1.1.1 connect-interface loopback 0

[PE3-bgp] ipv4-family vpnv4

[PE3-bgp-af-vpn] peer 11 enable

[PE3-bgp-af-vpn] peer 11.1.1.1 group 11

[PE3-bgp-af-vpn] quit

[PE3-bgp] quit

For the applications which require high robustness of network, you may use CE 
dual-home networking mode. 

CE1 and CE2 are respectively connected to PE1 and PE2 to achieve dual-homing. 
Three PEs are also connected to each other as back links. CE2 and CE4 are not in 
dual-home mode, and only connected to one PE. 

CE1 and CE3 are in one VPN, and CE2 and CE4 are in another VPN. Two VPNs 
cannot access each other.