Download the file and verify its against the hash provided on the manufacturer's website to ensure file integrity.
Network switches, routers, and firewalls require regular firmware updates to maintain security and stability. When web interfaces fail or devices enter recovery modes, the Trivial File Transfer Protocol (TFTP) provides a reliable, low-level method for uploading firmware. i tftp upgrade firmware version 1255 download install
Connect the Ethernet cable from your computer directly into the device's port (or dedicated Management port). Download the file and verify its against the