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Configuring OSPF Between the PE and CE Routers

In this configuration example, routes learned from the OSPF session for VPN A are installed into the routing tables defined in the vpna-vpnab routing table group. For VPN AB, routes learned from the OSPF session are installed into the routing tables defined in the vpnab-vpna_and_vpnb routing table group. For VPN B, routes learned from the OSPF session are installed into the routing tables defined in the vpnb-vpnab routing table group.

The VRF import and export policies are similar to those defined in Configuring Static Routes Between the PE and CE Routers and Configuring BGP Between the PE and CE Routers, except the export protocol is OSPF instead of BGP or a static route. Therefore, on all vrf-export policies, you use the from protocol ospf statement instead of the from protocol <static | bgp> statement.

On Router PE1, configure OSPF between the PE and CE routers:



[edit]
routing-instances {


VPN-A {
instance-type vrf;
interface fe-1/0/0.0;
route-distinguisher 10.255.14.175:3;
vrf-import vpna-import;
vrf-export vpna-export;


protocols {


ospf {
rib-group vpna-vpnab;
export vpna-import;


area 0.0.0.0 {
interface fe-1/0/0.0;
}


}


}


}




VPN-AB {
instance-type vrf;
interface fe-1/1/0.0;
route-distinguisher 10.255.14.175:9;
vrf-import vpnab-import;
vrf-export vpnab-export;


protocols {


ospf { 
rib-group vpnab-vpna_and_vpnb;
export vpnab-import;


area 0.0.0.0 {
interface fe-1/1/0.0;
}


}


}


}




VPN-B {
instance-type vrf;
interface fe-1/0/2.0;
route-distinguisher 10.255.14.175:10;
vrf-import vpnb-import;
vrf-export vpnb-export;


protocols {


ospf { 
rib-group vpnb-vpnab;
export vpnb-import;


area 0.0.0.0 {
interface fe-1/0/2.0;
}


}


}


}


}

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