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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
Configuring Virtual Routing and Forwarding Instances
Configure VRF instances on each PE router in the provider network. Create one VRF for each VPN
connected using the
ip vrf
command in global configuration mode or router configuration mode.
To create the VRF, do the following:
•
Specify the correct route distinguisher (RD) used for that VPN using the
rd
command in VRF
configuration submode. The RD is used to extend the IP address so that you can identify the VPN
to which it belongs.
•
Set up the import and export policies for the MP-BGP extended communities using the
route-target
command in VRF configuration submode. These policies are used for filtering the import and export
process.
To configure a VRF, enter the following commands on the PE router beginning in global configuration
mode:
Associating VRFs
After you define and configure the VRFs on the PE routers, associate each VRF with:
•
An interface or subinterface
•
A virtual template interface
The virtual template interface is used to create and configure a virtual access interface (VAI). For
information about configuring a virtual template interface, see the
“Configuring a Virtual Template
Interface” section on page 3-17
.
To associate a VRF, enter the following commands on the PE router beginning in interface configuration
mode:
Command
Purpose
Step 1
Router(config)#
ip vrf
vrf-name
Enters VRF configuration mode and defines the virtual routing
instance by assigning a VRF name.
Step 2
Router(config-vrf)#
rd
route-distinguisher
Creates routing and forwarding tables.
Step 3
Router(config-vrf)#
route-target
{
import
|
export
|
both
}
route-target-ext-community
Creates a list of import and export route target communities for
the specified VRF.
Step 4
Router(config-vrf)#
vpn id
oui
:
vpn
-
index
Assigns or updates a VPN ID on the VRF. The VPN ID uniquely
identifies a VPN and VRF across all VHG and PE routers in the
network.
Note
The VPN ID is used for provisioning only. BGP routing
updates do not include the VPN ID.
Command
Purpose
Step 1
Router(config-if)#
ip vrf forwarding
vrf-name
Associates a VRF with an interface or subinterface.
Step 2
Router(config-if)#
ip address
ip-address
mask
Sets a primary or secondary address for an interface.
Step 3
Router(config-if)#
exit
Returns to global configuration mode.
