In addition to the show version which may or may not show serial number information there is the command show inventory. This command indicates in its output that it is showing the serial number. I have used it on some equipment and gotten the actual serial number in the output. But I have also used this command on equipment and the serial number that shows up in the output is quite different from the serial number on the chassis.
I do not believe that at this point there is a dependable way to find the serial number from a command line function.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...