— Use the CLI command file list tftp to view files already in the TFTP directory, and file get tftp to obtain copies. You can also use a web browser to download any TFTP file by going to the URL: http://<tftp_server>:6970/<filename> .
| Error Message | Likely Cause | Solution | |---------------|--------------|----------| | Timeout | Firewall blocks UDP 69; server not running | Open port; start service | | File not found | Wrong filename or path | Use absolute path; check case sensitivity | | Invalid opcode | TFTP option extensions not supported | Use binary mode; disable block size negotiation | | Flash write failed | Incorrect erase offset | Verify flash map; use manufacturer’s tool | i tftp upgrade firmware version 1255 download new
Download and run a TFTP utility (like TFTPd64 for Windows or tftpd-hpa for Linux) on a computer connected to the same network as the switch or router. — Use the CLI command file list tftp
— Use the device’s web interface or CLI to save a backup file. Some TFTP procedures (especially from the bootloader) may reset the device to factory defaults. — Use the device’s web interface or CLI
