@browndog 

Same here... running 1.1.3 firmware and also don't have the option for the guest network....

  @browndog 

If you don't have that option in Deco app, the crude workaround is to enable only 2.4GHz band on guest network, disabling 5GHz. This will seriously reduce WiFi speeds for any device connected to guest network.

For Deco mesh with firmware that provides Support for setting Effective Time and Bandwidth Limit for guest network, configuring it documented here: How to set up a Guest Network for Deco

  @Alexandre. 

But can you tell me if by default the x20 series is even able to handle bandwidth control?

  @Rosus 

That would depend on X20 firmware version and what other Deco models you have in your Deco mesh. Make screenshot of Update Deco page in Deco app and share it here for me to take a look, it has all necessary information.

Example:

  @Alexandre. 

We have 3x x20 model. I've tried to update the firmware but the app is saying firmware is up to date...

  @Rosus 

Looking at your screenshot, all your Deco are X20 and all are on firmware 1.1.3. According to TP-Link document Understand the Differences Among Deco Firmware Platforms firmware 1.1.3 supports bandwidth limit on guest network, but you said you don't see that option. I checked and for my Deco mesh on similar level of firmware but for M9/M5 I should also see that option in Deco app. I don't.

There could be typo in that TP-Link document or perhaps something else. I posted the question to the forum topic with that TP-Link document, let's see what TP-Link Support will reply. If you'd like to, you can post your question there too, saying that your X20 with firmware 1.1.3 do not offer that feature, while they should according to the document.

  @Alexandre. 

I've found it...they need to be in router mode.... why I don't know....

Rosus wrote

  @Alexandre. 

 

I've found it...they need to be in router mode.... why I don't know....

  @Rosus 

I run my Deco mesh in AP mode, too. You must be right and that's why I don't see it in my Deco app.

I am going to delete my comment from the forum topic with TP-Link firmware differences table.

  @Alexandre. 

Well i still think it is stupid... bandwidth control should also be available even in accespoint mode...

  @browndog Same issue on my end. i have ac1200