Can no longer use any channels in Band A UNI-II Lower

[medwatt]

When I first got the AC66U_B1 router, I noticed that the 5GHz signal takes a long time before any of my devices can detect it. A member here suggested I should use channel 36 as channel 36 is not a DFS channel. That simple trick worked. However, today none of my devices were able to detect the 5GHz signal. I started changing channels and realized that I can detect any signal when the channels are set to channels 36, 40, 44, 48. Channels 52, 56, 60, 64 all work, but there's a slight delay of about 2 minutes after the 2.4GHz signal is detected. Can someone explain what's happening ?

 

[ColinTaylor]

That's normal. Router's have to wait at least 60 seconds before using a DFS channel to ensure it is free.

https://www.smallnetbuilder.com/bas...r-s-wi-fi-dynamic-frequency-selection-dfs-faq

 

[medwatt]

That's normal. Router's have to wait at least 60 seconds before using a DFS channel to ensure it is free.

https://www.smallnetbuilder.com/bas...r-s-wi-fi-dynamic-frequency-selection-dfs-faq

Yes, but why have I lost the ability to use channels 36 to 48, which are supposedly the free channels.

 

[ColinTaylor]

Yes, but why have I lost the ability to use channels 36 to 48, which are supposedly the free channels.

Sorry, I misunderstood the question because of the typo:

...I can detect any signal when the channels are set to channels 36, 40, 44, 48.

I don't know the answer. What region are you in, US?

Do you have the "Auto select channel including band 1 channels" option? Perhaps you could trying unsetting and setting that.

https://www.snbforums.com/threads/what-are-band1-channels.25681/

 

[medwatt]

Sorry, I misunderstood the question because of the typo:

I don't know the answer. What region are you in, US?

Do you have the "Auto select channel including band 1 channels" option? Perhaps you could trying unsetting and setting that.

https://www.snbforums.com/threads/what-are-band1-channels.25681/

Mine says "Auto select channels including DFS channels". But I don't use that. I manually selected channels 36, 40, 44, and 48. I couldn't detect the 5GHz signal despite waiting for more than 10 minutes.

 

[ColinTaylor]

Mine says "Auto select channels including DFS channels". But I don't use that. I manually selected channels 36, 40, 44, and 48. I couldn't detect the 5GHz signal despite waiting for more than 10 minutes.

What region are you in?

What channel do you see being used when you go to System Log > Wireless Log?

 

[medwatt]

What region are you in?

What channel do you see being used when you go to System Log > Wireless Log?

I bought the router from Amazon UK, but I live in South Africa. I want to emphasize that I have been using channel 36 all along. It was only yesterday that it stopped working.

 

[ColinTaylor]

I bought the router from Amazon UK, but I live in South Africa. I want to emphasize that I have been using channel 36 all along. It was only yesterday that it stopped working.

OK. What about the information on the Wireless Log page?

 

[medwatt]

OK. What about the information on the Wireless Log page?

Sorry, I wasn't home.

Here's my 5GHz setup page:

Here's the Wireless Log page:

 

[ColinTaylor]

Well, I'm out of ideas.

It might be worth changing the channel bandwidth from 20/40/80 to 20 just as an experiment.

 

[medwatt]

Well, I'm out of ideas.

It might be worth changing the channel bandwidth from 20/40/80 to 20 just as an experiment.

I tried all of that and even forced it into legacy mode. I can't understand it myself.