Connection problem in 5 Hz band. MSM765 Team

[Gararda]

Hello,

I have a team with two MSM765 (6.5.0.1-19720) controllers and a lot of remote APs (MSM 430) .

In one remote location, a user is capable to connect without problems (2.4 Hz or 5 Hz bands) in every floor of the building but one. In this floor the user try to connect to the 5 Hz band, seems to connect, but no receive IP address, it look like he does not finish to connect correctly. (picture 1)

The following logs are in the controller:
Info 2015-11-19 14:16:53 158843 B4:B5:2F:4F:B6:4D RADIUS request timeout while performing 802.1...
Info 2015-11-19 14:18:15 158859 B4:B5:2F:4F:B6:4D Authentication success
Info 2015-11-19 14:18:16 158860 B4:B5:2F:4F:B6:4D Authentication success
Info 2015-11-19 14:18:16 158861 B4:B5:2F:4F:B6:4D Association success
Info 2015-11-19 14:18:16 158862 B4:B5:2F:4F:B6:4D No PMKID in association request
Info 2015-11-19 14:19:33 158867 B4:B5:2F:4F:B6:4D Deauthenticate sent
Info 2015-11-19 14:19:33 158868 B4:B5:2F:4F:B6:4D RADIUS request timeout while performing 802.1...
Info 2015-11-19 14:20:00 158879 B4:B5:2F:4F:B6:4D Authentication success
Info 2015-11-19 14:20:01 158880 B4:B5:2F:4F:B6:4D Authentication success
Info 2015-11-19 14:20:01 158881 B4:B5:2F:4F:B6:4D Authentication success
Info 2015-11-19 14:20:01 158882 B4:B5:2F:4F:B6:4D Association success
Info 2015-11-19 14:20:01 158883 B4:B5:2F:4F:B6:4D No PMKID in association request
Info 2015-11-19 14:21:33 158913 B4:B5:2F:4F:B6:4D Deauthenticate sent
Info 2015-11-19 14:21:33 158914 B4:B5:2F:4F:B6:4D RADIUS request timeout while performing 802.1...

The following logs are in the ACS:
- EAP session timed out

When I disable the 5 Hz band, the user connect perfectly to the 2.4 Hz band.
The PC is W7 with Intel(R) Centrino(R) Advanced-N 6205 card

How can I debug this client to get some extra information?.

Best regards.

[Gararda]

The problem affect now other clients, I think the problem is related with the software version. I have read that the most stable versión is 6.4.2. Can someone confirm this is the most stable versión?.

Best regards.

[Gararda · Accepted solution]

Hi,

All problems solved with version 6.5.3.0. Version 6.5.0 seems to be very bad.
Regards