Niveo Professional NGSME16T2H - Manual (Page 107)

Chapter 3: Featuring Configuration – Web UI
Featuring Configuration – Web UI
NGSME16T2H User Manual | 107
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.