Zyxel RGS200-12P factory reset via serial

[Deleted User] · August 2025

I have a Zyxel RGS200-12HP switch that I would like to factory reset. Unfortunately, I do not have any login password, so I can only access the device through the serial console.

Could you please provide the official procedure for:

Reflashing or reinstalling the firmware via serial console (e.g., XMODEM, TFTP, or other supported methods).
Performing a full factory reset if no Web GUI or SSH access is possible.
Confirming which firmware file types are supported for recovery on this model (e.g., .bin, .rom).

Any step-by-step instructions or documentation links would be very helpful.

Thank you in advance for your support.

Zyxel_Melen · August 2025

Hi @Livioburch

Please check if your console cable matches and if the baud rate is correct.

For the command, please check the private message I sent.

scerazy · December 2025

Why oh why you do not provide proper KB with instructions?

It is my unit, I can do whatever I want to it!?

Thanks

SC

Zyxel_Melen · December 2025

Hi @scerazy

There have some security reasons, so we didn't write a KB for this process.

I have sent the steps to you via private message, please check.

Pratap · April 21

https://community.zyxel.com/en/discussion/comment/79802#Comment_79802

I have same issue. I forgot my login credentials. Also I cannot access via console. After booting, it ont let me enter in console. I think due to some security problems but how to reset it.