User's Manual

96 Operation
Chapter 4 - Operation and Administration
4.4.4.1.1 Shared Secret
Shared Secret is the key used for encrypting the User name and Password
transmitted to the RADIUS server(s).
For security and control reasons, the Shared Secret option is available only for
users with Administration access rights, using the Administrator Password to
access the program. The Shared Secret cannot be changed using SNMP. For the
same security reasons, the Shared Secret is displayed as a series of asterisks, and
when defining it for the first time or updating it, the user is prompted to re-enter
the new Shared Secret for confirmation.
Valid Shared Secret: Up to 16 printable characters, case sensitive.
The default Shared Secret is null (Shared Secret must be defined).
4.4.4.1.2 Retry Interval (sec)
The Retry Interval parameter defines the time in seconds to wait before
retransmitting a RADIUS message if no response is received.
The range is 1-5 (seconds).
The default value is 5 (seconds).
4.4.4.1.3 Maximum Number of Retries
The Maximum Number of Retries parameter defines the maximum number of
retransmission attempts, before a decision is taken to revert to another server if
configured, or give up.
The range is 0-5 (retries).
The default value is 3 (retries).
4.4.4.1.4 Keep Alive Timeout (sec)
The NPU maintains a keep alive mechanism with all defined servers. The Keep
Alive Timeout defines the time in seconds to wait before reaching a decision that a
certain server is no longer available.
The range is 60-180 (seconds).
The default value is 60 (seconds).
NOTE
For security reasons, the Shared Secret does not change after performing the Set Factory Defaults
operation. For the same reason, the Shared Secret is not included in backup configuration files.