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Forum Discussion

Dmitri_Ch__1425's avatar
Dmitri_Ch__1425
Icon for Cirrus rankCirrus
Oct 23, 2015

RADIUS Health Check timeout

Hi,   Is there a way to increase timeout for RADIUS heath-check monitor? Current value seems to be ~5sec, and I cannot find where to increase it. The 'Timeout' value on configuration page of th...
application delivery
LTM
Kevin_Davies_40's avatar
Kevin_Davies_40
Icon for Nacreous rankNacreous
Oct 25, 2015

I just created a RADIUS health check monitor and the default is 10 seconds with a 31 second timeout. Where is this response delay? I am unable to find that in the F5 configuration.

 

So you know the recommended timeout is always interval x 3 + 1 second. This assumes you will get a response from the target within one second. You will need to adjust that accordingly if that is not the case.

 

Your interval should always be larger than the expected response time by a factor of two or three to prevent the F5 sending a second request before the first has completed under normal conditions. The timeout should then be three times the interval + the response time to prevent false negatives.

 

"I would like to F5's Radius monitor to fail only when I get Rejected or 'Timeout' (in monitor configuration) reached."

 

There is no way to configure this in a RADIUS monitor. It fails to auth, for whatever reason, it will be considered offline.