WLC Radius Server Load Balance

Xiang Hong Angela YAN — Sun, 04 Jul 2021 02:22:39 GMT

Hi,

Can someone provide me detailed description on how WLC Radius Server Load balance works.

Becuase, I encounted a problem of User Authenticated with the 1st Radius Server, but Accounting Records are actually on 2nd Server .

Any response will be very appreciated

-Angela

Re: WLC Radius Server Load Balance

Nicolas Darchis — Mon, 08 Nov 2010 07:31:27 GMT

Hi Angela,

I pasted below the part of config guide explaining the different modes. In summary :

-Fallback off means : when 1st radius server shows dead , WLC moves to the second. And will only change again when the 2nd is dead too.

-Passive means : whent 1st radius is dead, WLC moves to the second. If there is a new authentication coming in, it will try the 1st radius server again

-Active means : WLC constantly sends radius probes to detect when primary is back up.

config radius fallback-test mode {off | passive | active}

where

•off disables RADIUS server fallback.

•passive causes the controller to revert to a server with a lower priority from the available backup servers without using extraneous probe messages. The controller simply ignores all inactive servers for a time period and retries later when a RADIUS message needs to be sent.

•active causes the controller to revert to a server with a lower priority from the available backup servers by using RADIUS probe messages to proactively determine whether a server that has been marked inactive is back online. The controller simply ignores all inactive servers for all active RADIUS requests. Once the primary server receives a response from the recovered ACS server, the active fallback RADIUS server no longer sends probe messages to the server requesting the active probe authentication.

topic WLC Radius Server Load Balance in Wireless

WLC Radius Server Load Balance

Re: WLC Radius Server Load Balance