Run a quick diagnostic: diag --loopback 100 . Success is indicated by a return of 255/255 packets acknowledged with zero collisions.
Once your system reboots, check the version string: upgrade firmware version 1.255
systemctl status firmware
If your system is still running on Version 1.24x or earlier, you are currently operating on borrowed time. Here is everything you need to know before hitting the upgrade button. Run a quick diagnostic: diag --loopback 100
The 1.255 Threshold: Why This Firmware Upgrade Changes Everything upgrade firmware version 1.255