Using bgp to advertise vpn routes to the pe, Network requirements – H3C Technologies H3C S5820V2 Series Switches User Manual
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[PE1] display ip routing-table vpn-instance vpn2
Destinations : 13 Routes : 13
Destination/Mask Proto Pre Cost NextHop Interface
0.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
40.1.1.0/24 Direct 0 0 40.1.1.2 Vlan40
40.1.1.0/32 Direct 0 0 40.1.1.2 Vlan40
40.1.1.2/32 Direct 0 0 127.0.0.1 InLoop0
40.1.1.255/32 Direct 0 0 40.1.1.2 Vlan40
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.0/32 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
127.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
192.168.10.0/24 OSPF 150 1 40.1.1.1 Vlan40
224.0.0.0/4 Direct 0 0 0.0.0.0 NULL0
224.0.0.0/24 Direct 0 0 0.0.0.0 NULL0
255.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
Now, the routing information of the two VPNs has been redistributed into the VPN routing tables
on PE 1.
Using BGP to advertise VPN routes to the PE
Network requirements
As shown in
, configure the MCE to advertise the routes of VPNs 1 and 2 to PE 1, so that the sites
of each VPN can communicate with each other over the MPLS backbone.
Run OSPF in both VPNs 1 and 2, and run EBGP between the MCE and PE 1.