I installed Controller 4402 with 44 1252 APs.  It just seems the wireless network is not passing dns info when a laptop is connected thru wireless (only able to ping by its IP adress) , but when same machines  are wired they communicate fine by machi...

Which Catalyst will replace the 3550 12G (core switch), so all the downlink switch will communicate via gigastack to the core switch? If not what is the alternative?