We have three 3750's in a stack, they all pretty much have one vlan spanning across them (they're access layer switches). One of our systems guys went into the closet to press the mode button, he was trying to see which switch is #1 in the stack...instead of pressing the button he held it down for a good 15 seconds which caused it to reboot. I know holding the button down for that long causes the switch to erase its configuration, but he ended up affecting all the users. The I checked the switch and the vlan we have on there was down, I had to reconfigure it (the vlan settings were there, but the svi was gone). Why would holding the button down on one switch for 10 seconds affect all 3 switches?