ip pim hello-authentication ah-md5

To enable an MD5 hash authentication key in IPv4 Protocol Independent Multicast (PIM) hello messages, use the ip pim hello-authentication ah-md5 command. To disable hello-message authentication, use the no form of this command.

ip pim hello-authentication ah-md5 auth-key

no ip pim hello-authentication ah-md5 [ auth-key ]

Syntax Description

auth-key
MD5 authentication key. You can enter an unencrypted (cleartext) key, or one of these values followed by a space and the MD5 authentication key:
  • 0—Specifies an unencrypted (cleartext) key
  • 3—Specifies a 3-DES encrypted key
  • 7—Specifies a Cisco Type 7 encrypted key
The key can be from 1 to 16 characters.

Command Default

Disabled

Command Modes

Interface configuration mode

Command History

Release
Modification
5.0(3)N1(1)
This command was introduced.

Usage Guidelines

Triple Data Encryption Standard (3-DES) is a strong form of encryption (168-bit) that allows sensitive information to be transmitted over untrusted networks. Cisco Type 7 encryption uses the algorithm from the Vigenère cipher.

This command requires the LAN Base Services license.

Examples

This example shows how to enable a 3-DES encrypted key for PIM hello-message authentication:

switch(config)# interface ethernet 2/2
switch(config-if)# ip pim hello-authentication-ah-md5 3 myauthkey
 

This example shows how to disable PIM hello-message authentication:

switch(config)# interface ethernet 2/2
switch(config-if)# no ip pim hello-authentication-ah-md5
 

Related Commands

Command
Description
show ip pim interface
Displays information about PIM-enabled interfaces.