Cisco NAC Tip: Finding Cisco NAC Appliance Serial through the CLI

It’s never fun trying to open a Cisco TAC case and realizing that you can’t find the serial number of the NAC Appliance that is having a problem.  Instead of having to trek to the data center to grab the serial number, you can retrieve it by accessing the NAC Appliance via SSH.   I ran into this problem and found a great post about it on the Cisco Support Forum.  The basic steps are listed below.

1. SSH to the NAC Appliance
2. Type “dmidecode | grep Serial Number”
3. View the serial number and open your TAC case