Manual

Layer 2 Tunnel Protocol Version 3
How to Configure Layer 2 Tunnel Protocol Version 3
32
Cisco IOS Releases 12.0(29)S and 12.2(25)S
Step 3
l2tp-class [l2tp-class-name]
Example:
Router(config)# l2tp-class class1
Specifies the L2TP class name and enters L2TP class
configuration mode.
• The l2tp-class-name argument is optional. However, if
you want to configure multiple L2TP classes you must
specify a unique l2tp-class-name for each one.
Step 4
digest [secret [0 | 7] password] [hash {md5 |
sha}]
Example:
Router(config-l2tp-class)# digest secret cisco
hash sha
or
Router(config-l2tp-class)# digest hash sha
(Optional) Enables L2TPv3 control connection
authentication or integrity checking.
• secret—(Optional) Enables L2TPv3 control
connection authentication.
Note If the digest command is issued without the secret
keyword option, L2TPv3 integrity checking will be
enabled.
• [0 | 7]—Specifies the input format of the shared secret.
The default value is 0.
– 0—Specifies that a plain-text secret will be
entered.
– 7—Specifies that an encrypted secret will be
entered.
• password—Defines the shared secret between peer
routers. The value entered for the password argument
must be in the format that matches the input format
specified by the [0 | 7] keyword option.
• hash {md5 | sha}—(Optional) Specifies the hash
function to be used in per-message digest calculations.
– md5—Specifies HMAC-MD5 hashing.
– sha—Specifies HMAC-SHA-1 hashing.
The default hash function is md5.
Command or Action Purpose