 up any of the ports on the front of the switch. I won't go into the physical connection of a switch stack, as the Cisco documentation is more than adequate. On a single 24-port 3750, the interfaces are numbered Gi1/0/1-Gi1/0/23. The inter- faces are described as interface-type stack-member#/module#/port#. The interface- type is usually Gigabit Ethernet on a 3750, though some models support 10 Gb ports. The stack-member# is 1 for a standalone switch, and for a stacked switch, reflects the position the switch occupies in the stack. The module# on a 3750 is always 0. The port# is the physical port number on the switch. Thus, port 14 on the third switch in a stack would be numbered Gi3/0/14. If you break a stack of 3750s and use them each independently, they may not renumber themselves. For example, here's a switch I pulled from a stack. It used to be switch 2, but now it's a standalone switch. The problem is, it still believes that it is switch 2: IOS-3750#sho switch detail Switch/Stack Mac Address : dc7b.94dd.2280 Current Switch# Role Mac Address Priority Version State Master dc7b.94dd.2280 Ready While this may not seem like a big deal, the annoying part is that all the interfaces are numbered as if this switch was the second switch in a stack: IOS-3750#sho ip int brie Interface IP-Address OK? Method Status Protocol Vlan1 unassigned YES NVRAM administratively down down GigabitEthernet2/0/1 unassigned YES unset GigabitEthernet2/0/2 unassigned YES unset down GigabitEthernet2/0/3 unassigned YES unset down [-- output truncated --] This is pretty easy to fix, but I need to do it SO rarely that I always forget how. All you need to do is issue the switch switch-number renumber new-switch-number command and reboot. Let's see that in action, because though it's a simple process, it may not work as you'd expect. Since this is switch 2 and I want it to be switch 1, I'll issue the switch 2 renumber 1 command: IOS-3750(config) #switch 2 renumber 1 WARNING: Changing the switch number may result in a configuration change for tha