I have a cisco 4006 with a SUP II card, running CatOS. This switch has a router/switch card. For some reason when a switch which is connected to the 4006 reboots, the 4006 thinks this link should be a trunk and turns that port into a trunk port, killing the connection to the remote switch. We do not use VTP, so we do not have any switches with trunk ports enabled, can anyone tell me how to prevent this or why this is happening?