08-13-2015 06:34 PM - edited 07-05-2021 03:45 AM
09-17-2015 04:28 AM
I have also seen this problem in our environment. Also got som "internal error" messages when trying to athenticate with mobile devices.
11-20-2015 04:51 AM
Did you find a solution to this? We're running into the 500-Internal Server Error issue as well. Seems to be related to the WLC and ISE having different radius session id's intermittently.
11-20-2015 05:28 AM
We found the solution for our issue.
We were using the internal NTP server and sometimes we had a problem to synchronize the time with Active directory and ISE (had a delay).
This delay to internal server can occurs when have a Firewall used to local default gateway to internal vlan.
In our case we had a firewall used with default gateway , after changed the NPT server internal to external server of Active Directory and ISE and after this action our issue is solved.
11-20-2015 05:21 AM
We found the solution for our issue.
We were using the internal NTP server and sometimes having problem to synchronize the time with Active directory and ISE had a delay.
In our case we changed the NPT server internal to external server of Active Directory and ISE and after this action our issue is solved.
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