Manual

Layer 2 Tunnel Protocol Version 3
How to Configure Layer 2 Tunnel Protocol Version 3
33
Cisco IOS Releases 12.0(29)S and 12.2(25)S
Configuring L2TP Control Channel Maintenance Parameters
The L2TP hello packet keepalive interval control channel maintenance parameter can be configured in
L2TP class configuration mode.
This task configures the interval used for hello messages in an L2TP class. This control channel
parameter configuration is optional. If this parameter is not configured, the default value will be applied.
SUMMARY STEPS
1. enable
2. configure terminal
3. l2tp-class [l2tp-class-name]
4. hello interval
Step 5
digest check
Example:
Router(config-l2tp-class)# digest check
(Optional) Enables the validation of the message digest in
received control messages.
• Validation of the message digest is enabled by default.
Note Validation of the message digest cannot be disabled
if authentication has been enabled using the digest
secret command. If authentication has not been
configured with the digest secret command, the
digest check can be disabled to increase
performance.
Step 6
hidden
Example:
Router(config-l2tp-class)# hidden
(Optional) Enables AVP hiding when sending control
messages to an L2TPv3 peer.
• AVP hiding is disabled by default.
• In Cisco IOS Release 12.0(29)S, only the hiding of the
cookie AVP is supported.
• If a cookie is configured in L2TP class configuration
mode (see the section “Manually Configuring L2TPv3
Session Parameters”), enabling AVP hiding causes that
cookie to be sent to the peer as a hidden AVP using the
password configured with the digest secret command.
Note AVP hiding is enabled only if authentication has
been enabled using the digest secret command, and
no other authentication method is configured.
Command or Action Purpose