Configuring The Backbone Carrier Core; Configuring The Csc-Pe And Csc-Ce Routers; Configuring A Csc-Pe - Cisco CRS Configuration Manual

Configuring Carrier Supporting Carrier
Step 2
Identify the CE routers.
Sets up requirements for configuration of CE to PE connections.
Step 3 Identify the customer carrier core router configuration.
Sets up requirements for configuration between core (P) routers and between P routers and edge routers (PE and CSC-CE
routers).
Step 4
Identify the customer carrier edge (CSC-CE) routers.
Sets up requirements for configuration of CSC-CE to CSC-PE connections.
Step 5 Identify the backbone carrier router configuration.
Sets up requirements for configuration between CSC core routers and between CSC core routers and edge routers
(CSC-CE and CSC-PE routers).

Configuring the Backbone Carrier Core

Configuring the backbone carrier core requires setting up connectivity and routing functions for the CSC core
and the CSC-PE routers. To do so, you must complete the following high-level tasks:
• Verify IP connectivity in the CSC core.
• Verify LDP configuration in the CSC core.
This task is not applicable to CSC over IP tunnels.
Note
• Configure VRFs for CSC-PE routers.
• Configure multiprotocol BGP for VPN connectivity in the backbone carrier.

Configuring the CSC-PE and CSC-CE Routers

Perform the following tasks to configure links between a CSC-PE router and the carrier CSC-CE router for
an MPLS VPN CSC network that uses BGP to distribute routes and MPLS labels:
The following figure shows the configuration for the peering with directly connected interfaces between
CSC-PE and CSC-CE routers. This configuration is used as the example in the tasks that follow.
Figure 39: Configuration for Peering with Directly Connected Interfaces Between CSC-PE and CSC-CE Routers

Configuring a CSC-PE

Perform this task to configure a CSC-PE.
Cisco IOS XR Virtual Private Network Configuration Guide for the Cisco CRS Router, Release 6.1.x
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Implementing MPLS Layer 3 VPNs