# Configuring Customer Carrier as an Internet Service Provider

You must complete the following configuration process when the customer carrier provides Internet connectivity for its customers.

On the provider carrier's PE router:

1. Basic MPLS Configuration Tasks
2. Configure BGP.
3. Configure an IGP.
4. Configure LDP.
5. Configure VRF.
6. Enable carrier-of-carriers support on the VRF; use the mpls topology-driven-lsp command in the context of the VRF virtual router to enable MPLS support.
7. Enable LDP on the interface in the VRF that connects to the customer carrier's PE router.
8. Use the show ip bgp vpnv4 vrf vrfname summary command to verify that carrier-of-carriers support is enabled.

On the customer carrier's PE router that connects to the provider carrier's PE router:

1. Configure MPLS.
2. Configure BGP.
3. Configure an IGP.
4. Configure LDP—Enable carrier-of-carriers support on the VR; use the mpls topology-driven-lsp command in the context of the VRF virtual router to enable LDP support.
5. Enable LDP on the interface in the VR that connects to the provider carrier's PE router.

#### Related Documentation

- Customer Carrier as an Internet Service Provider
- mpls topology-driven-lsp