3Com Switch 8800 Family Configuration Guide

Typical BGP/MPLS VPN Configuration Example 555
[P-vlan302] port gigabitethernet 3/1/2
[P-vlan302] quit
[P] interface Vlan-interface 302
[P-Vlan-interface302] ip address 172.2.1.2 255.255.0.0
[P-Vlan-interface302] mpls
[P-Vlan-interface302] mpls ldp enable
[P-Vlan-interface302] quit
[P] vlan 303
[P-vlan303] port gigabitethernet 3/1/3
[P-vlan303] quit
[P] interface Vlan-interface 303
[P-Vlan-interface303] ip address 172.3.1.2 255.255.0.0
[P-Vlan-interface303] mpls
[P-Vlan-interface303] mpls ldp enable
[P-Vlan-interface303] quit
[P] vlan 304
[P-vlan304] port gigabitethernet 3/1/4
[P-vlan304] quit
[P] interface Vlan-interface 304
[P-Vlan-interface304] ip address 172.4.1.2 255.255.0.0
[P-Vlan-interface304] mpls
[P-Vlan-interface304] mpls ldp enable
[P-Vlan-interface304] quit
# Enable OSPF protocol on the interfaces connecting P and PE, import
direct-connect route to achieve inter-PE communication.
[P] ospf
[P-ospf-1] area 0
[P-ospf-1-area-0.0.0.0] network 172.1.1.0 0.0.255.255
[P-ospf-1-area-0.0.0.0] network 172.2.1.0 0.0.255.255
[P-ospf-1-area-0.0.0.0] network 172.3.1.0 0.0.255.255
[P-ospf-1-area-0.0.0.0] network 172.4.1.0 0.0.255.255
[P-ospf-1-area-0.0.0.0] quit
[P-ospf-1] import-route direct
4 Configure PE3
n
The configuration on PE3 is similar to that on PE1, you should pay more attention
to VPN routing attribute setting on PE3 to get information about how to control
advertisement of a same VPN routing information (with same VPN-target) over
MPLS network.
# Create VPN-instance for VPNA on PE3, configure correlative attributes to control
advertisement of VPN routing information.
[PE3] ip vpn-instance vpna
[PE3-vpn-vpna] route-distinguisher 100:3
[PE3-vpn-vpna] vpn-target 111:1 both
[PE3-vpn-vpna] quit
# Set up MP-EBGP adjacency between PE3 and CE3, import intra-CE3 VPN routes
learned into MBGP VPN-instance address family.
[PE3] bgp 100
[PE3-bgp] ipv4-family vpn-instance vpna
[PE3-bgp-af-vpn-instance] import-route direct
[PE3-bgp-af-vpn-instance] group 168 external