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4.4.3 Security / AAA Authentication Server Configuration
This page allows you to configure the Authentication Servers.
Common Server Configuration
These setting are common for all of the Authentication Servers.
Timeout
The Timeout, which can be set to a number between 3 and 3600 seconds, is the maximum time to wait
for a reply from a server. If the server does not reply within this timeframe, we will consider it to be dead
and continue with the next enabled server (if any).
RADIUS servers are using the UDP protocol, which is unreliable by design. In order to cope with lost
frames, the timeout interval is divided into 3 subintervals of equal length. If a reply is not received within
the subinterval, the request is transmitted again. This algorithm causes the RADIUS server to be queried
up to 3 times before it is considered to be dead.
Dead Time
The Dead Time, which can be set to a number between 0 and 3600 seconds, is the period during which
the switch will not send new requests to a server that has failed to respond to a previous request. This will
stop the switch from continually trying to contact a server that it has already determined as dead.
Setting the Dead Time to a value greater than 0 (zero) will enable this feature, but only if more than one
server has been configured.