How to know the Ap is down from the controller . There are no indicator in wireless controller to show the ap that is down in  wireless controller 5760.  Please help

two WS-C2960S-48FPD-L switches with different version ,one is 12.2(55)SE7 and one is 12.2(55)SE8  stack together.will it be problem ?

Hi  , I have the repeats log found at my WLC 5760.*%APF-3-VALIDATE_DOT11i_CIPHERS_FAILED: 1 wcm:  Could not validate Dot11i security IE. Received an invalid Broadcast OUI code from mobile.Mobile:a8:06:00:ef:f2:5a[...It occurred 3 times/sec!.]  -Trace...

can ws-c2960s-24ts-l & ws-c2960s-24ps-l ( existing  environment)stack with WS-C2960X-24TS-L ? since ws-c2960s-24ts-l is going to AEOS.how many switches can be stack ?

HI  I have the SAP 1262 with firmware version 12.4 . Want to setup dymanic vlan with single SSID that authentication  to server Microsoft NPS.Can it work ? Any configuration guide? how to tie single SSID to use for multiple vlan ?Please help .