Lantech LGS-2624C, User Manual, Page: 230 / 279

To configure a Authentication Server Configuration of AAA in the
web interface:
1. Check
―Enabled‖.
2. Specify IP address or Hostname for Server.
3. Specify Authentication Port for Server (Default is 49).
4. Specify the Secret with Server.
Parameter description:
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.