The serial number will be in the format: ‘LLLYYWWSSSS’ where ‘YY’ is the year of manufacture and ‘WW’ is the week of manufacture. This requirement is especially the case when you need a. When you create a service request with Cisco Technical Support, you must have the serial number of the affected devices at hand. The serial numbers are necessary to create a database of the parts in the network. This document shows how to determine the serial numbers of various replaceable components on various Cisco Catalyst switches. I decided to put in this post some useful commands to identify the Cisco hardware components and their respective identifiers (serial nnumber) on different platforms.
Now most of you I believe know the commands “show version” or “show hardware” which will get all the information that you need most of the time, but not always. Some days ago I had to check for the serial number of a faulty fan tray that need to be exchanged in C6500 series.
