Cisco Systems MPC-273 manual As an Asbr eBGP peer, MPC-286

Implementing MPLS VPNs over IP Tunnels on Cisco IOS XR Software

How to Configure MPLS VPNs over IP Tunnels

DETAILED STEPS

	Command or Action		Purpose
Step 1
	configure		Enters global configuration mode.
	Example:
	RP/0/0/CPU0:router# configure
Step 2
	router bgp autonomous-system-number		Enters Border Gateway Protocol (BGP) configuration mode
			allowing you to configure the BGP routing process.
	Example:
	RP/0/0/CPU0:router(config)# router bgp 120
	RP/0/0/CPU0:router(config-bgp)#
Step 3
	address-family {ipv4 tunnel}		Configures IPv4 tunnel address family.
	Example:
	RP/0/RP0/CPU0:router(config-bgp)#
	address-family ipv4 tunnel
	RP/0/0/CPU0:router(config-bgp-af)#
Step 4
	address-family {vpnv4 unicast}		Configures VPNv4 address family.
	Example:
	RP/0/0/CPU0:router(cconfig-bgp-af)#
	address-family vpnv4 unicast
Step 5
	neighbor ip-address		Places the router in neighbor configuration mode for BGP
			routing and configures the neighbor IP address
	Example:		172.168.40.24 as an ASBR eBGP peer.
	RP/0/0/CPU0:router(config-bgp-af)# neighbor
	172.168.40.24
	RP/0/0/CPU0:router(config-bgp-nbr)#
Step 6
	remote-asautonomous-system-number		Creates a neighbor and assigns it a remote autonomous
			system number.
	Example:
	RP/0/0/CPU0:router(config-bgp-nbr)# remote-as
	2002
Step 7
	address-family {vpnv4 unicast}		Configures VPNv4 address family.
	Example:
	RP/0/0/CPU0:router(config-bgp-nbr)#
	address-family vpnv4 unicast
	RP/0/0/CPU0:router(config-bgp-nbr-af)#
Step 8
	route-policyroute-policy-name {in}		Applies a routing policy to updates that are received from a
			BGP neighbor.
	Example:		• Use the route-policy-nameargument to define the name
	RP/0/0/CPU0:router(config-bgp-nbr-af)#		of the of route policy. The example shows that the route
	route-policy pass-all in		policy name is defined as pass-all.
			• Use the in keyword to define the policy for inbound
			routes.
		Cisco IOS XR MPLS Configuration Guide
MPC-286			OL-12284-01