The following bug in the 3750 switch causes problems Out-of Band with
Clean Access:
http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCsg31176
When you have a stack of more than one switch and you are connected to a
switch other than the first switch, The CAM changes the VLan on the wrong
port.when you authenticate.
We are currently running our 3750 switches In-Band due to this bug. If
this is affecting you also, please alert your Cisco representative to this
bug.
Thanks,
Bruce Osborne
Network Engineer
Liberty University