I have a middle size county government network using Cisco 3750's as closet access switches. I want a notification or to be able to identify when a user connects a hub or switch to an access port as that is against our policy. Recently a vendor installed a 'printer' at a remote site. When I checked, the vendor had installed a hub on the port and had two PC's, a printer, and an access point all installed. I do not want to turn on port security as that seems like a nightmare to manage, but I want to be able to detect when a user, inside or outside, installs a hub on an access port.