Range Extender disconnect from DFS channel and never recovered

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Range Extender disconnect from DFS channel and never recovered
Range Extender disconnect from DFS channel and never recovered
2020-10-26 14:49:34 - last edited 2020-11-30 03:15:49
Model: RE300
Hardware Version:
Firmware Version:

I'm using:

RE300(UK) Ver:1.0

RE305(AS) Ver:3.0

RE settings includes High Speed 5G to 2G, the rest are defaults (the reason I bought TP Link product is because of the High Speed feature).

 

Connecting to enterprise grade WIFI access point: Ubiquiti "UAP-AC-LR"

Set to fixed channel 132 (DFS), 20MHz bandwidth.

Understand that the above range extender models support band3 (100 104 108 112 116  120 124 128 132 136 140) as from my previous thread.

 

Both range extender successfully connected to the access point with "Good" signal.

Initially the Power(solid white/blue), Signal(solid white/blue) and 5G(solid white/blue) LED are lit.

After a few hours both got disconnected and never reconnect back.

Only the Power(solid white/blue) LED is lit, the rest are off.

The only workaround is to manually power cycle and it will connect back, which is impractical.

 

I have a "Google Nest Hello" WIFI doorbell camera, that was connected to the same WIFI access point (5G channel 132), and the recorded video stream was uninterrupted the whole period, which means that the access point did not have any issue (at least between the AP and the camera).

 

I happened to saw the possible cause from a link from your website FAQ

"

How does DFS Operate?

Before Operation:

If 5GHZ devices with DFS function enabled choose a DFS channel before operation, the devices will detect radar signals for a period of time (about 1 or 10 minutes). And if radar signals are detected on current channel, the devices will vacate that channel and switch to another channel.

During Operation:

When operating on a DFS channel, 5GHZ devices with DFS function enabled will monitor the operating channel for radar signals continuously. If radar signals are detected on the current operating channel, the devices will also abdicate that channel and choose an alternative channel.

 

How does DFS affect you?

The 5GHz device may choose a DFS channel during its initial state, so client device will not be able to find its wireless network for a while.

If the device is already operating on a DFS channel and radar signals are detected you will encounter disconnection, however the connection can be restored after a while. But you may see the change in the operating channel.

Note:

  1. If operating on channel 52,56,60,64,100,104,108,112,132,136,140, 5GHZ devices should detect radar signals for about 1 minute, and it should take for about 10 minutes when operating on channel 116,120,124,128 according to ITU-T Radio Regulations. Wireless client are not able to find the wireless signal broadcasting by the AP during this period.
  2. Although DFS give you the choice to use DFS channels but it may be annoying when there is radar operating nearby. To mitigate the effect of DFS you may choose a fixed non-DFS channel if available.
"

I have no issues with band 1 channels.

However, I actually needed the channel in band 3 due to the constraints mentioned in my previous thread

 

Can your engineers figure out a way to reconnect to the same channel, hopefully within 1 minute if it was somehow disconnected from the quote above?

Strange that my doorbell camera did not get disconnected at all (was the range extender radar detection too sensitive?).

Or find a fix to reconnect quickly without the user manually power cycling it (or best try not to disconnect in the first place)?

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1 Accepted Solution
Re:Range Extender disconnect from DFS channel and never recovered-Solution
2020-11-30 03:08:56 - last edited 2020-11-30 03:15:49

I've received the new beta firmware for both RE300 and RE305, and tested them for a week with no issue.

This issue will be resolved once the new firmware incorporating the fix is officially released.

 

Thank you TP-LINK team.

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Re:Range Extender disconnect from DFS channel and never recovered
2020-10-30 08:02:39

@Amano7 

Good day,

Thank you very much for your time and patience.

Sorry for the delay.

For your case, we would like to forward your case to our senior engineers.

And please have a check of your email later.

Thanks a lot.

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Re:Range Extender disconnect from DFS channel and never recovered-Solution
2020-11-30 03:08:56 - last edited 2020-11-30 03:15:49

I've received the new beta firmware for both RE300 and RE305, and tested them for a week with no issue.

This issue will be resolved once the new firmware incorporating the fix is officially released.

 

Thank you TP-LINK team.

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