CDP not being enabled as a cause for failing connections doesn't seem to make much sense to me. You said that CleanAir was also disabled. On an earlier post, I think George Stefanick mentioned that he'd seen some 3500 Service Provider APs, and I was thinking maybe there's a chance that's what you got. If so, it may point to a different default configuration wherein one of those default parameters was causing your issue (and perhaps not CDP).
Strange, though, that when you enabled CDP things started working. Question for you-- if you disable CDP again, do the COWs again have connection issues?
As soon as the Computer on wheels (COW) were rolled in to the area, the constent pint I was running dropped, then displayed destination unreachable, then came up with hardware error. This happend on both COWs at the same time, but the 2 laptops worked fine.
We plugged a netgear wifi dongle in, the connected in the area, but when removed this and the COW was running on it Cisco WIFI card, it failed again.
But as soon as leaving this area, they started to connect again. The laptops never lost connection
One thing also is that you really shouldn't enable CleanAir if you have a mixed environment because the non 3500/3600's can't play nice with the CleanAir AP's. Now when you were testing, did you verify that the COWs were still in the correct SSID and verified that you see the client probing on that SSID from the wlc? CDP being enabled or disabled shouldn't have any affect on connection, but the Cisco cards are pretty old and I can see that you might have some that are getting bad. The Cisco cards are also known for being sticky... They will try to stay connected to an access point even if you have lower data rates disabled. It was a big issue in some of my installs and troubleshooting COWs back in the days. You are probably better off finding a replacement card maybe that supports 802.11n since you are rolling out 3500 APs.
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...