I have 2 nortel 460s and 1 nortel 470 switches. They are trunked together, not stacked. One of the 460s is the main switch. The other 460 and the 470 are trunked off the main 460. I can ping the 470 but can not ping the 460s, either the main 460 or the trunked 460. I am assuming this is a configuration issue. Does anyone have any clues?