Cisco Systems MPC-273 Configuring the Backbone Carrier Core for IP Tunnels, MPC-288, Purpose

Implementing MPLS VPNs over IP Tunnels on Cisco IOS XR Software

How to Configure MPLS VPNs over IP Tunnels

	Command or Action	Purpose
Step 14
	address-family {vpnv4 unicast}	Configures VPNv4 address family.
	Example:
	RP/0/0/CPU0:router(config-bgp-nbr-af)#
	address-family vpnv4 unicast
Step 15
	end	Saves configuration changes.
	or	• When you issue the end command, the system prompts
	commit	you to commit changes:
		Uncommitted changes found, commit them before
	Example:	exiting(yes/no/cancel)?
	RP/0/0/CPU0:router(config-bgp-nbr-af)# end	[cancel]:
	or	– Entering yes saves configuration changes to the
	RP/0/0/CPU0:router(config-bgp-nbr-af)# commit
		running configuration file, exits the configuration
		session, and returns the router to EXEC mode.
		– Entering no exits the configuration session and
		returns the router to EXEC mode without
		committing the configuration changes.
		– Entering cancel leaves the router in the current
		configuration session without exiting or
		committing the configuration changes.
		• Use the commit command to save the configuration
		changes to the running configuration file and remain
		within the configuration session.

Configuring the Backbone Carrier Core for IP Tunnels

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.

•Configure IP tunnels in the core.

•Configure VRFs for CSC-PE routers.

•Configure multiprotocol BGP for VPN connectivity in the backbone carrier.

Configuring CSC-PE Routers for IP Tunnels

Perform this task to configure a CSC-PE for IP tunnels.

For information on how to configure CSC-CE routers, see the Implementing MPLS Layer 3 VPNs on Cisco IOS XR Software module.

SUMMARY STEPS

1.configure

2.router bgp as-number

3.address-family {vpnv4 unicast}

	Cisco IOS XR MPLS Configuration Guide
MPC-288	OL-12284-01