Hi  @terziyski 

I tried what you mentioned and still having the same issue.

I was on the Main Wifi , then I switched to EXT and when I tried to go back to the Main one, Same eror (that the IP is being used...)

Please see my LAN Config right now

Is it possible to try anything else? :(

Thanks

 Hi  @terziyski 

I selected the following settings

Then I unplugged the router and when it finished starting, I unplugged/plugged the RE.

Switching from MAIN to EXT worked but when I tried to switch it back, same thing happened.

I double checked and the RE Settings were correctly saved.

Not sure what to do :(

 @terziyski I think I sang Victory to early.

It worked but then It stopped working.

What I did in the middle is to select the EXT network in one of my Smart TV´s.

Then When I switched from EXT to MAIN. 

Same thing happened :(

Just to clarify, my Network had two Laptops, two phones and two Smart Tv´s.

  @terziyski 

For my iphone something similar is hapenning.

It connects to EXT but when I tried to connect to MAIN nothing is happening (Wi fi Connection keeps looping)

When I plugged/unplugged the router I´m able to connect perfectly with my laptop and phone but then same thing happens.

It appears that after a while RE is inhibiting my router.

  @terziyski 

Just to add, I just plug/unplugged the RE to take this picture (to double check if I had the latest firmware) and when _EXT was off, my laptop automatically connected to MAIN without problems

Could it be a Firmware issue?

 Hello  @terziyski ,

Thanks for the follow up and your reply.

I took an ScreenShoot of my RE´s current FirmWare.

Is not the most updated one?

Thanks