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3-14
Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 3 Configuring Remote Access to MPLS VPN
Configuration Tasks for RA to MPLS VPN
Note Apply the ip vrf forwarding command and then the ip address command. If you do not, the ip vrf
forwarding command removes the existing IP address on the interface.
Example 3-1 Associating a VRF with an Interface
interface GigabitEthernet7/0/0.1
encapsulation dot1Q 11
ip vrf forwarding vpn1
ip address 192.168.1.1 255.255.255.0
!
Example 3-2 Associating a VRF with a Virtual Template Interface
interface Virtual-Template1
ip vrf forwarding vpn1
ip unnumbered Loopback1
no peer default ip address
ppp authentication chap vpn1
ppp authorization vpn1
ppp accounting vpn1
Configuring Multiprotocol BGP PE to PE Routing Sessions
To configure multiprotocol BGP (MP-BGP) routing sessions between the PE routers, enter the following
commands on the PE routers beginning in global configuration mode:
Step 4
Router(config)# interface virtual-template
number
Creates a virtual template interface and enters interface
configuration mode.
Step 5
Router(config-if)# ip vrf forwarding
vrf-name
Associates a VRF with a virtual template interface.
Command Purpose
Command Purpose
Step 1
Router(config)# router bgp autonomous-system
Configures the internal BGP (iBGP) routing process with the
autonomous system number passed along to other
iBGP
routers.
Step 2
Router(config-router)# no bgp default
ipv4-unicast
Disables IPv4 BGP routing.
Step 3
Router(config-router)# neighbor {ip-address |
peer-group-name} remote-as as-number
Configures the neighboring PE router’s IP address or iBGP
peer group and identifies it to the local autonomous system.
The MP-BGP neighbors must use the loopback addresses.
Step 4
Router(config-router)# neighbor {ip-address |
peer-group-name} update-source interface-type
Allows iBGP sessions to use any operational interface for
TCP connections.
Step 5
Router(config-router)# neighbor {ip-address |
peer-group-name} activate
Activates route exchanges with the global BGP neighbors.