Our LAN comprises of a Master 3550 catalyst switch and on all the other floors we have 2950s. I'd like to know why whenever the master switch goes offline for any reason at all e.g. power failure e.t.c. when the power is restored, we loose network connectivity until we turn off all the switches, and turn them all back on starting from the master switch. I've argued that there has to be a command that will re-establish the link but I'm not sure what it is so if any kind Cisco Gurus out there know any way round this please do share, and thanks for your much appreciated help in advance. If you require further info, please let me know.