Firmware update failed - Bad File Descriptor

TriLanSupport

Trying to update a USG110 to 4.7.3 and getting a file descriptor error when uploading via FTP.

Any suggestion what this is referring so I can find a solution to update this device?

Zyxel_Jeff

Hi @TriLanSupport

Thanks for reporting this case to us.
If you are near your device, we suggest you can refer below steps to update firmware:
STEP1. Download and back up the current running startup-config.conf file from the path: MAINTENANCE > File Manager > Configuration File.
STEP2. Reboot to the standby partition.
STEP3. Apply the current running startup-config.conf file.
STEP4. Update to our latest firmware V4.73P2
You could refer to this FAQ article for more information :

https://community.zyxel.com/en/discussion/13597/recovery-steps-if-you-cannot-update-the-firmware-in-the-running-partition

You can download the firmware from this link: https://portal.myzyxel.com/my/firmwares
Thanks.

TriLanSupport

Thanks for the steps and link. Will try this process when I get in front of device and update.