I have what I believe to be a unique issue with the 3 WiSM's that I have on my network. I have a 6509 running 12.2(18)SXF8 and (3) WiSM's running 22.214.171.124 inside of that single chassis. They are running fine, but sometimes, one of the controllers will become unreachable through the GUI. It will then be unreachable through telnet or through the service interface from the switch. I can still console to the WiSM, but that's it. It never drops any of the AP's it is supporting, but if I can't manage it, what good is it?