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Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 5 Configuring the Layer 2 Tunnel Protocol Access Concentrator and Network Server
Layer 2 Access Concentrator
Enabling Sessions with Different Domains to Share the Same Tunnel
To enable sessions authorized with different domains to share the same tunnel, enter the following
commands:
Verifying Tunnel Sharing Configuration on the LAC
To verify tunnel sharing configuration on the LAC, enter the following command in privileged EXEC
mode:
Enabling the LAC to Conduct Tunnel Service Authorization
To enable the LAC to conduct static or dynamic tunnel service authorization, perform the following
tasks:
• Configuring a Static Domain Name on a Permanent Virtual Circuit, page 5-8 or Configuring a Static
Domain Name on a Virtual Circuit Class, page 5-10
• Enabling Domain Preauthorization, page 5-11
• Configuring the LAC to Communicate with the RADIUS Server, page 5-11
Configuring a Static Domain Name on a Permanent Virtual Circuit
To configure a static domain name on a permanent virtual circuit (PVC), enter the following commands:
Command Purpose
Step 1
Router> enable
Enters privileged EXEC mode.
Step 2
Router# config terminal
Enters global configuration mode.
Step 3
Router(config)# vpdn-group group-name
Defines a local group name for which you can assign other VPDN
variables. Enters VPDN group configuration mode.
Step 4
Router(config-vpdn)# request-dialin
Enables the LAC to request L2TP tunnels to the Cisco 10000
series router and enters VPDN request-dialin group mode.
Step 5
Router(config-vpdn-req-in)# protocol 12tp
Specifies the Layer 2 Tunnel Protocol.
Step 6
Router(config-vpdn-req-in)# domain
domain-name
Requests that PPP calls from the specified domain be tunneled.
Note For multiple domains over the same tunnel, repeat this
step to list all of the domains you want that tunnel to
support. To configure the same domain over multiple
tunnels, you must configure load balancing and sharing
between the tunnels by using the loadsharing ip
ip-address [limit session-limit] command in VPDN group
configuration mode.
Step 7
Router(config-vpdn-req-in)# exit
Returns to VPDN group configuration mode.
Step 8
Router(config-vpdn)# initiate-to ip
ip-address [priority priority-number]
Specifies the LNS IP address and optionally the priority of the IP
address (1 is the highest).
Command Purpose
Router# show running-config
Displays the running configuration and allows you to check that
you successfully enabled the tunnel sharing feature.