Joseph C. Lehner

> The mac address I used with the -m command was randomly generated `-m` doesn't make sense with anything but the actual MAC address of the device. Please try running...

Does the following command work? ``` % sudo nmrpflash -i en8 -vv -f RBR50-V9.2.5.2.34SF-HW.img -c 'arp -d $IP; arp -s $IP 14:59:C0:4D:C3:27` ```

Try running the following command, using the `nmrpflash` version supplied below: ``` sudo nmrpflash -i en8 -vv -f RBR50-V9.2.5.2.34SF-HW.img -m 14:59:C0:4D:C3:27 -c 'arp -a' ``` [nmrpflash-0.9.22-17-g346ada7-macos.zip](https://github.com/user-attachments/files/16111952/nmrpflash-0.9.22-17-g346ada7-macos.zip)

You could try using macOS' `tftp` command for uploading. Note the lack of `-f`. ``` sudo nmrpflash -m 14:59:C0:4D:C3:27 -i en8 -vv -c 'echo -e "verbose\nput RBR50-V9.2.5.2.34SF-HW.img" | tftp -e...

Thank you for your followup! Since you've got access to the router console, I too have a favor to ask: could you send me a dump of this device's bootloader?...

Scratch that, [these sources](https://www.downloads.netgear.com/files/GPL/RBK50_V2.7.5.4_gpl_src.zip) also contain the bootloader's source code.

Could be a hardware issue with the router's Ethernet, since it looks like your computer doesn't even detect that a cable has been connected. I'm assuming you used `Ctrl-C` to...

Thanks to everyone involved! I had already planned for nmrpflash to display some hints and possible fixes in case of an error, and I've added this solution to the list....

Are all other settings reset as well, or just the time definitions?

This device's bootloader's (u-boot) TFTP implementation _should_ gracefully handle a block rollover. You could try downgrading to an older version though, that's less than 32 MiB in size: https://www.downloads.netgear.com/files/GDC/RBK752/RBS750-V3.2.10.10_1.2.12.zip