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