If you don’t have all of the switches documented with the serial numbers in a handy location it can be thorough pain to get the serial numbers especially if the switches are in a different geographical location. Here’s how you get that info without too much sweat.
One of the most annoying things I can think of is having multiple Cisco IOS terminal sessions open and then switching back over to one of the terminal windows only to find that the session has been disconnected. Here is how you fix that.
First of all, I am not the author of this content. This is a section taken from Cisco Document ID: 24061 on how to Recover a Cisco IOS Catalyst 4500/4000 Series Switch from a Corrupt or Missing Image or in Rommon Mode.