Make sure it is using binary mode when transferring the. bin into the fw directory and it should immediately apply the upgrade then reboot. Check that FTP is enabled in Maintenance -> Remote Management. If the Firmware Upgrade option is not available then you can use FTP instead to upload the firmware even if you only know the admin password. You'll need to log in as admin or supervisor. bin file via the Maintenance -> Firmware Upgrade menu in the web UI. The complete firmware image is bin/brcm963xx/zyxel/ras.bin and should be roughly 28MB.įlash the. Install necessary tools with sudo apt-get install -y g++ flex bison gawk make autoconf zlib1g-dev libncurses-dev git subversion gettext Run sudo dpkg-reconfigure dash and select no. Using anything else is likely to cause buildroot to fail and generate nothing or a broken firmware image. You must use the 32-bit version of Ubuntu 12.04.5 LTS Desktop to build this firmware. In no event shall the author or contributors be held liable for any damages arising in any way from the use of this software. This software is provided 'as is,' without warranty of any kind, express or implied. The baby jumbo frame change and the firmware binary have been tested on several VMG3925-B10B units with success but you apply it to your own equipment at your own risk. The stock Zyxel firmware is limited to 1492 MTU for bridging. V5.13(AAVF.12)C0 for a Zyxel VMG3925-B10B with baby jumbo frames (1508) support enabled.