How did you upgrade the IOS? Did you use the "copy" command and copied only the BIN file? The 12.4(21a), like the 12.4(10b), needs the entire TAR file to be extracted to the appliance because part of the package is a pair of radio module firmware.
Steve Rodriguez's post contain the exact command you need. I recommend that you follow them.
Transferring Crash file from standby:
Login to the Active WLC in HA.
(Cisco Controller) >transfer upload datatype crash
(Cisco Controller) >transfer upload filename <Desired filename>
(Cisco Controller) >transfer up...
This is the start of a display filter cross reference between Wireshark and OmniPeek.
The 1st installment is a table of advanced filters. More filters will be added as time allows.
It is a living doc, so check back for changes every so often
Please feel ...
I have created a Powershell script to automatically add a Wireless Guest User on Cisco WLCs. (tested on 2500 Series)
The script should be completely self explanatory.
Powershell SNMP Module (Install-Module -Name SNMP)
SNMP Write Access to...