After an upgrade of my V4110 from 09.15.05 to V9.21.04 i have problems with Intel 6205 WLAN Clients in 5GHz and AP3825! Either the Client cannot connect to WLAN SSID (in 5GHz) OR it will work fine first but after 3-4 hours the ping latency will increase to 800/900ms. On good days all work fine. Within 2,4 GHz no/never problem occurs. We have the same problem with 9.01.x and 9.12. With 9.15.x the problem never occur / disappear. Now with 9.21 it seems that we have the problem again. WLAN client driver are up to date!
How can i troubleshoot this issue ? Are there any useful log or debug command at EWC ? Is it possible to get a troubleshooting from client site ?