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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
L2TP Network Server
Configuring a VRF on the LNS
To configure a VRF, enter the following commands:
For more information about configuring a VRF, see the “Configuring Multiprotocol Label Switching
chapter in the Cisco IOS Switching Services Configuration Guide, Release 12.2.
Configuring Sessions per Tunnel Limiting on the LNS
To limit the number of sessions per tunnel without using a RADIUS server, 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)# ip vrf vrf-name
Enters VRF configuration mode and defines the VPN
routing instance by assigning a VRF name.
Step 4
Router(config-vrf)# rd route-distinguisher
Creates routing and forwarding tables.
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)# accept-dialin
Configures the LNS to accept tunneled PPP connections from the
LAC and creates an accept-dialin VPDN subgroup.
Step 5
Router(config-vpdn-acc-in)# protocol 12tp
Specifies the Layer 2 Tunnel Protocol.
Step 6
Router(config-vpdn-acc-in)#
virtual-template template-number
Specifies the virtual template to be used to clone virtual access
interfaces.
Step 7
Router(config-vpdn-acc-in)# exit
Returns to VPDN group configuration mode.
Step 8
Router(config-vpdn)# terminate-from
hostname host-name
Specifies the host name of the remote L2TP access concentrator
(LAC) that is required when accepting a VPDN tunnel.
Step 9
Router(config-vpdn)# session-limit
limit-number
Specifies the maximum number of sessions per tunnel.