You cannot simply type “i tftp upgrade firmware version 1255 download new” into a command line and expect magic. Follow this checklist:
Your job is not done after the reboot. Perform these critical tasks: i tftp upgrade firmware version 1255 download new
The phrase “i tftp upgrade firmware version 1255 download new” suggests an interactive sequence. A generic example on a device console: You cannot simply type “i tftp upgrade firmware
# Access device shell/bootloader
> enable
# Set TFTP server IP
setenv serverip 192.168.1.100
# Set device IP (if not assigned)
setenv ipaddr 192.168.1.50
# Download and flash
tftp 0x80000000 firmware_1255.bin
# Erase old firmware region (if required)
erase 0x9f000000 +0x400000
# Copy new firmware from RAM to flash
cp.b 0x80000000 0x9f000000 0x400000
# Verify and reboot
reset
Alternatively, a single command on some devices: Alternatively, a single command on some devices: tftp
tftp upgrade firmware_1255.bn
TFTP is insecure by design (no authentication, no encryption). Therefore:
For modern devices, prefer HTTPS or SFTP; use TFTP only if bootloader requires it.