Manual

Layer 2 Tunnel Protocol Version 3
digest check
91
Cisco IOS Releases 12.0(29)S and 12.2(25)S
digest check
To enable the validation of the message digest in received control messages, use the digest check
command in L2TP class configuration mode. To disable the validation of the message digest in received
control messages, use the no form of this command.
digest check
no digest check
Syntax Description This command has no keywords or arguments.
Defaults Message digest validation is enabled by default.
Command Modes L2TP class configuration
Command History
Usage Guidelines Message digest validation is enabled by default. The data path received sequence number update is
deactivated, and the minimum local receive-window-size is restricted to 35.
If the no digest check command is issued, received message digests will be ignored and control
messages will be accepted. The data path received sequence number update will be activated, and there
will be no restriction on the minimum receive-window-size.
Note The no digest check command is not valid if Layer 2 Tunneling Protocol Version 3 (L2TPv3) control
channel authentication has been configured using the digest secret command.
Examples The following example configures control connection integrity checking and disables validation of the
message digest:
l2tp-class class1
digest hash sha
no digest check
The following example disables validation of the message digest. Control connection authentication and
control connection integrity checking are both disabled.
l2tp-class class1
no digest check
Release Modification
12.0(29)S This command was introduced.