RADIUS packet already in the process

[venkateshchandran]

Hi,

Frequently we are facing radius packet already in the process error message.

Cisco ISE version : 3.1 patch 6

[Arne Bier]

This is often found with customers who have wireless 802.1X (sending RADIUS requests from their APs/WLCs to ISE).  Have a look at the timeout settings on the AP/WLC - if it's 2sec, then change to 5 sec (Cisco recommended value).

I have also seen this a lot with users roaming between APs - each time a user roams, it causes another 802.1X request - if the WLC is not caching the keying material, then it causes a lot of traffic to the RADIUS server.