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Chapter 3
Configuring Remote Access to MPLS VPN
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Configuring a Virtual Template Interface
To create and configure a virtual template interface, enter the following commands beginning in global
configuration mode:
Command
Step 1
Router(config)# interface virtual-template
number
Step 2
Router(config)# ip unnumbered ethernet
number
Step 3
Router(config-if)# ppp authentication chap
Step 4
Router(config-if)# ppp ipcp ip address
required
Example 3-4
interface virtual-template 1
ip unnumbered Loopback1
no peer default ip address
ppp authentication chap vpn1
ppp ipcp ip address required
ppp authorization vpn1
ppp accounting vpn1
Monitoring and Maintaining a Virtual Access Interface
When a virtual template interface is applied dynamically to an incoming user session, a virtual access
interface (VAI) is created. You cannot use the command line interface (CLI) to directly create or
configure a VAI, but you can display and clear the VAI by using the following commands in privileged
EXEC mode:
Command
Router# show interfaces virtual-access number
[configuration]
Router# clear interface virtual-access number
Example 3-5
Router# show interfaces virtual-access 1.1 configuration
!
interface virtual-access1.1
OL-2226-23
Configuring PPPoE over Ethernet Virtual Connections and Applying Virtual Templates, page 3-20
Configuring RBE over ATM Virtual Connections, page 3-22
Configuring a Virtual Template Interface
Displaying the Active VAI Configuration
ip vrf forwarding vrf-1
ip unnumbered Loopback1
no ip proxy-arp
Purpose
Creates a virtual template interface and enters interface
configuration mode.
Enables IP without assigning a specific IP address on the LAN.
Enables PPP authentication on the virtual template interface.
Required for legacy dial up and DSL networks. Prevents a PPP
session from being set up with 0.0.0.0 remote ip address.
Purpose
Displays the configuration of the active VAI that was created using
a virtual template interface.
The configuration keyword restricts output to configuration
information.
Tears down the live sessions and frees the memory for other client
uses.
Cisco 10000 Series Router Software Configuration Guide
Configuration Tasks for RA to MPLS VPN
3-17
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Table of Contents
Troubleshooting
