Restrictions For Lac; Required Configuration Tasks For Lac; Enabling The Lac To Look For Tunnel Definitions; Optional Configuration Tasks For Lac - Cisco 10000-2P2-2DC Software Configuration Manual

Chapter 5 Configuring the Layer 2 Tunnel Protocol Access Concentrator and Network Server

Restrictions for LAC

When configured as a LAC device, the Cisco 10000 series router has the following restrictions:
•
•

Required Configuration Tasks for LAC

To configure the Cisco 10000 series router to act as a LAC, perform the following required configuration
task:
•

Enabling the LAC to Look for Tunnel Definitions

To enable the LAC to look for tunnel definitions, you must enable the VPDN feature on the LAC. To
enable VPDN, enter the following commands:
Command
Step 1
Router> enable
Step 1
Router# config terminal
Step 1
Router(config)# vpdn enable
Step 2
Router(config)# vpdn-group group-name
Step 3
Router(config-vpdn)# request-dialin
Step 4
Router(config-vpdn-req-in)# protocol 12tp
Step 5
Router(config-vpdn-req-in)# exit
Step 6
Router(config-vpdn)# initiate-to ip ip-address
[priority priority-number]

Optional Configuration Tasks for LAC

To configure the Cisco 10000 series router as a LAC, perform any of the following optional tasks:
•
•
•
OL-2226-23
The L2TP LAC per session features do not support PPP quality of service (QoS) and security access
control lists (ACLs).
The Cisco 10000 series router does not support the configuration of L2TP tunnels over the
management Fast Ethernet interface. Do not set up L2TP tunnels over this interface.
Enabling the LAC to Look for Tunnel Definitions, page 5-7
Enabling Sessions with Different Domains to Share the Same Tunnel, page 5-8
Enabling the LAC to Conduct Tunnel Service Authorization, page 5-8
Configuring Sessions Per Tunnel Limiting on the LAC, page 5-12
Purpose
Enters privileged EXEC mode.
Enters global configuration mode.
Enables VPDN networking on the router and informs the
router to look for tunnel definitions in a local database and
on a remote authorization server (home gateway), if one is
present.
Defines a local group name for which you can assign other
VPDN variables. Enters VPDN group configuration mode.
Enables the LAC to request L2TP tunnels to the
Cisco 10000 router and enters VPDN request-dialin group
mode.
Specifies the Layer 2 Tunnel Protocol.
Returns to VPDN group configuration mode.
Specifies the LNS IP address and optionally the priority of
the IP address (1 is the highest).
Cisco 10000 Series Router Software Configuration Guide
Layer 2 Access Concentrator
5-7