Alcatel-Lucent 7750 SR-OS, Configuration Manual

Page: 349 / 674

VRRP
7750 SR OS Router Configuration Guide Page 349
Configuration Commands
Interface Configuration Commands
authentication-key
Syntax authentication-key [ authentication-key | hash-key ] [ hash | hash2 ]
no authentication-key
Context config>router>if>vrrp
Description
This command sets the simple text authentication key used to generate master VRRP advertisement
messages and validates VRRP advertisements.
If simple text password authentication is not required, the authenticaton-key command is not
required.
The command is configurable in both non-owner and owner vrrp nodal contexts.
The key parameter identifies the simple text password to be used when VRRP Authentication Type 1
is enabled on the virtual router instance. Type 1 uses an eight octet long string that is inserted into all
transmitted VRRP advertisement messages and is compared against all received VRRP advertisement
messages. The authentication data fields are used to transmit the
key .
The key string is case sensitive and is left justified in the VRRP advertisement message authentication
data fields. The first field contains the first four characters with the first octet (starting with IETF RFC
bit position 0) containing the first character. The second field similarly holds the fifth through eighth
characters. Any unspecified portion of the authentication data field is padded with a 0 value in the
corresponding octet.
If the command is re-executed with a different password key defined, the new key is used ediately.
The authentication-key command can be executed at anytime.
To change the current in-use password key on multiple virtual router instances:
1. Identify the current master.
2. Shutdown the virtual router instance on all backups.
3. Execute the authentication-key command on the master to change the password key.
4. Execute the authentication-key command and no shutdown command on each backup.
The no form of the command reverts to the default value.
Default
no authentication-key — The authentication key value is the null string.
Parameters
authentication-key — The authentication key. Allowed values are any string up to 8 characters long
composed of printable, 7-bit ASCII characters. If the string contains special characters (#, $,
spaces, etc.), the entire string must be enclosed within double quotes.