Configure MPLS Layer-3 VPN
The MPLS Layer-3 VPN configuration process can be divided into the following tasks
| 1. | Establish connection between PE routers. |
| 2. | Configure PE1 and PE2 as iBGP neighbors. |
| 3. | Create VRF. |
| 4. | Associate interfaces to VRFs. |
| 5. | Configure VRF Route Destination and Route Targets. |
| 6. | Configure CE neighbor for the VPN. |
| 7. | Verify the MPLS to VPN configuration. |
Topology
In this example, the CConnect MPLS-VPN backbone has two customers — ComA and ComB. Both customers have sites in California and Arizona. The following topology shows BGP4 address assignment between PE and CE routers. The steps that follow provision a customer VPN service across the MPLS-VPN backbone.
Figure 18. Connect Sample Topology
Establishing this connection involves three steps:
Enable Label Switching
This is a sample configuration to enable label switching for the Labeled Switched Path (LSP) between PE1 and PE2.
Enable Label Switching: PE1
|
configure terminal |
Enter configure mode |
|
(config)#interface lo |
Enter interface mode |
|
(config-if)#ip address 2.2.2.2/32 secondary |
Assign the IPv4 address |
|
(config-if)#exit |
Exit interface mode |
|
(config)#interface xe1 |
Enter Interface mode |
|
(config-if)#ip address 10.10.12.1/24 |
Assign IPv4 address |
|
(config-if)#label-switching |
Enabling label switching capability on router |
|
(config-if)#commit |
Commit the transaction. |
Enable Label Switching: P
|
configure terminal |
Enter configure mode |
|
(config)#interface lo |
Enter interface mode |
|
(config-if)#ip address 4.4.4.4/32 area 0 secondary |
Assign the IPv4 address |
|
(config-if)#exit |
Exit interface mode |
|
(config)#interface xe1 |
Enter Interface mode |
|
(config-if)#ip address 10.10.12.2/24 |
Assign IPv4 address |
|
(config-if)#label-switching |
Enabling label switching capability on router |
|
(config-if)#commit |
Commit the transaction. |
|
(config)#interface xe2 |
Enter Interface mode |
|
(config-if)#ip address 10.10.13.1/24 |
Assign IPv4 address |
|
(config-if)#label-switching |
Enabling label switching capability on router |
|
(config-if)#commit |
Commit the transaction. |
Enable Label Switching: PE2
|
configure terminal |
Enter configure mode |
|
(config)#interface lo |
Enter interface mode |
|
(config-if)#ip address 3.3.3.3/32 secondary |
Assign the IPv4 address |
|
(config-if)#exit |
Exit interface mode |
|
(config)#interface xe2 |
Enter Interface mode |
|
(config-if)#ip address 10.10.13.2/24 |
Assign IPv4 address |
|
(config-if)#label-switching |
Enabling label switching capability on router |
|
(config-if)#commit |
Commit the transaction. |