Configuring Carrier's Carrier
In the networking of carrier's carrier, the Level 2 carrier provides BGP/MPLS IPv6 VPN services for its users.
Usage Scenario
On the network shown in Figure 1, if the BGP/MPLS IPv6 VPN users are also service providers, who provide BGP/MPLS IPv6 VPN services for their customers, you can use the carrier's carrier configuration.
In this situation:
The Level 1 carrier network is the IPv4 network.
The Level 2 carrier network is the IPv4 network.
The users of the Level 2 carrier network are the IPv6 network.
Pre-configuration Tasks
Before configuring the carrier's carrier, complete the following tasks:
Configure an IGP for the Level 1 carrier's MPLS backbone network to implement the IP connectivity of the backbone network.
Configure the basic MPLS capacity and the LDP for the Level 1 carrier's MPLS backbone network and establish the LSP.
Establish the MP-IBGP connection between the Level 1 carrier PEs.
Configure an IGP for the Level 2 carrier's IP network or MPLS network to the IP connectivity.
Configure the basic MPLS capacity and LDP for the Level 2 carrier network and establish the LSP if the Level 2 carrier provides the BGP/MPLS IPv6 VPN services.
- Configuring Level 1 Carrier CE to Access the Level 1 Carrier PE (Intra-AS)
- If the Level 1 carrier and the Level 2 carrier are in the same AS, the Level 1 carrier takes the Level 2 carrier as its VPN user. The configuration of carrier's carrier is similar to the configuration of CE accessing PE in the basic BGP/MPLS IP VPN.
- Configuring Level 1 Carrier CE to Access Level 1 Carrier PE (Inter-AS)
- If the Level 1 carrier and the Level 2 carrier are in different ASs, the Level 1 carrier takes the Level 2 carrier as its VPN user, and the configuration of carrier's carrier is similar to the configuration of CE accessing PE in the basic BGP/MPLS IP VPN.
- Configuring the Level 2 Carrier's Customer to Access the Level 2 Carrier PE
- The Level 2 carrier provides IPv6 VPN services for its users, and the configuration of the Level 2 carrier is similar to the configuration of CE accessing PE in the basic BGP/MPLS IPv6 VPN.
- Configuring External Route Exchanges Between Level 2 Carrier PEs
- This section describes how to configure the MP-BGP peer relationship between PEs to exchange VPNv6 routes.
- Verifying the Configuration of Carrier's Carrier
- After carrier's carrier is configured, you can view information about public network routes and VPN routes on PEs and CEs of the Level 2 carrier and Level 1 carrier.