Our Aironet 350 access points are deauthenticating and then reassociating clients randomly. The strange thing is that the clients don't roam to another access point, they just reassociate to the same access point that they left. On the voice side we are exeriencing periodic droputs during conversations. After the network had been stable for a while, I decided to upgrade to 12.3(8)JEA3 which was very unstable for voice. I'm now using 12.3(7)JA5 which is suffering from the dropout problem. We're using Spectralink PTB810 phones with the latest software release. It's obvious that upgrading the access points changed a setting that is causing the dropout problem. I've used NetStumbler and signals look good. I also verified all of the QoS settings from Spectralink and Cisco documentation.
000268: Aug 15 08:33:47
Interface Dot11Radio0, Station 0090.7a04.c50d Reassociated KEY_MGMT[NONE]
000267: Aug 15 08:33:43
Interface Dot11Radio0, Deauthenticating Station 0090.7a04.c50d Reason: Previous authentication no longer valid
000266: Aug 15 08:33:42
Interface Dot11Radio0, Station 0090.7a04.c50d Associated KEY_MGMT[NONE]