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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-29225-01
Chapter 21 Configuring L2TPv3 Over UDP/IP
Relationship between L2TP Class and Pseudowire Class
Relationship between L2TP Class and Pseudowire Class
Multiple pseudowire classes can be configured. A pseudowire class can configured with any one of the
available L2TP Classes. Xconnect can be configured with any one of the configured pseudowire classes.
The following points should be kept in mind:
• A pseudowire class can have only one L2TP Class attached to it.
• An L2TP Class can be attached to multiple pseudowire-classes.
• An xconnect command has a pseudowire-class attached to it, so for one xconnect command only one
pseudowire and one L2TP Class is sufficient.
• An L2TP Class not attached to a pseudowire-class and a pseudowire not attached to a xconnect
command have no effect on working of an AP.
• L2TP Class attached with a Pseudowire Class cannot be modified. To modify, remove the xconnect
from interface which is using this Pseudowire Class.
Configuring the Tunnel interface
This is a new interface for single tunnel support. You can configure xconnect here for all L2TPv3 traffic.
Beginning in privileged EXEC mode, follow these steps to configure the tunnel interface:
The vc id is a number which is locally significant. Every xconnect command must be configured with a
unique vc id. Traffic for ssids that have xconnect VDT index configured, get tunneled through a VDT
interface with same index.
Examples
ap1# configure terminal
ap1(config)# interface VDT0
ap1(config-if)# xconnect 100.100.10.2 10 pw-class mypwclass
ap1(config-if)# end
Configure Tunnel management Interface
This is a new interface for secondary tunnel support.
Beginning in privileged EXEC mode, follow these steps to configure the tunnel management interface:
Command Purpose
Step 1
interface VDT index Specifies the VDT interface.
Step 2
no ip address Disables the IP addresses
Step 3
xconnect LNS ip | vc-id | pw-class
pseudowire class name
Configures the LNS IP and attaches the Pseudowire Class.