Multi-Protocol Label Switching (MPLS) Support
▀ Configuring BGP/MPLS VPN with Dynamic Labels
▄ Cisco ASR 5x00 Packet Data Network Gateway Administration Guide
426
Configuring BGP/MPLS VPN with Dynamic Labels
This section describes the procedures required to configure the system as an MPLS-CE to interact with a PE with
dynamic MPLS label support.
The base configuration, as described in the
Routing
chapter in this guide, must be completed prior to attempt the
configuration procedure described below.
Important:
The features described in this chapter is an enhanced feature and need enhanced feature license. This
support is only available if you have purchased and installed particular feature support license on your chassis.
Important:
Commands used in the configuration samples in this section provide base functionality to the extent
that the most common or likely commands and/or keyword options are presented. In many cases, other optional
commands and/or keyword options are available. Refer to the
Command Line Interface Reference
for complete
information regarding all commands.
To configure the system for BGP/MPLS VPN:
Step 1
Create a VRF on the router and assign a VRF name by applying the example configuration in the
Create VRF with
Route-distinguisher and Route-target
section.
Step 2
Set the neighbors and address family to exchange routing information and establish BGP peering with a peer router by
applying the example configuration in the
Set Neighbors and Enable VPNv4 Route Exchange
section.
Step 3
Configure the address family and redistribute the connected routes domains into BGP by applying the example
configuration in the
Configure Address Family and Redistribute Connected Routes
section. This takes any routes from
another protocol and redistributes them to BGP neighbors using the BGP protocol.
Step 4
Configure IP Pools with dynamic MPLS labels by applying the example configuration in the
Configure IP Pools with
MPLS Labels
section.
Step 5
Optional
. Bind DHCP service to work with dynamic MPLS labels in corporate networks by applying the example
configuration in the
Bind DHCP Service for Corporate Servers
section.
Step 6
Optional
. Bind AAA/RADIUS server group in corporate network to work with dynamic MPLS labels by applying the
example configuration in the
Bind AAA Group for Corporate Servers
section.
Step 7
Optional
. Modify the configured IP VRF, which is configured to support basic MPLS functionality, for mapping
between DSCP bit value and experimental (EXP) bit value in MPLS header for ingress and egress traffic by applying
the example configuration in the
DSCP and EXP Bit Mapping
section.
Step 8
Save your configuration as described in the
System Administration Guide
.
Create VRF with Route-distinguisher and Route-target
Use this example to first create a VRF on the router and assign a VRF name. The second
ip vrf
command creates the
route-distinguisher and route-target.
configure
