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Unable to see the SSID configured on some of the laptops - VX9000 with AP310i


We recently installed new vx9000 controller with AP310i in our office network. But Some of the clients unable to see the SSID broadcasted by AP while the next table client able to see the SSID & connect also. Can anyone help me what should be the issue? 

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Best answer by Christoph S. 13 January 2021, 16:52

In addition to what Stephan recommended, some older wireless clients can’t see SSIDs coming from WIFI 6 APs when 802.11ax is enabled. You can also test by disabling 802.11ax to see if the SSID will be visible to said clients

 

Here’s a link with instructions on enabling and disabling this parameter: https://extremeportal.force.com/ExtrArticleDetail?an=000085792

 

I hope this helps,

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Userlevel 6

In addition to what Stephan recommended, some older wireless clients can’t see SSIDs coming from WIFI 6 APs when 802.11ax is enabled. You can also test by disabling 802.11ax to see if the SSID will be visible to said clients

 

Here’s a link with instructions on enabling and disabling this parameter: https://extremeportal.force.com/ExtrArticleDetail?an=000085792

 

I hope this helps,

Userlevel 6
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Hello,

a common cause for this behavior is that the SSID is only broadcasting in 5GHz, but the laptop is only capable of 2.4GHz. Therefore check on what Radio on what frequenze the SSID is broadcasted.

 

Thanks for the response. But as I already checked laptops having issue capable of both 2.4ghz & 5ghz and it can see other SSID. Only unable to see SSID configured in VX9000. Also AP's are broadcasting both the bands.

Userlevel 6
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Another point can be the channel. Some devices are not able to see channel 12 and 13 in 2.4 Ghz (depending on the country they made for). In addition if you are using 5 GHz. Some devices are not able to use channels > 48.

 

Thanks for the update. What is the default channel 2.4ghz band uses in AP310i? Because I have not made any changes in channel part. Can you please also share the process how I can change the channel on 2.4ghz band? Also what is the generally used channel in 2.4ghz band which support maximum type of end devices?

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First of all you can check if the cause is the channel. You can install a programm on an working client to see the channels used by the AP. For example you can use the software inSSIDer it is still available in a free version.

If you have the used channels in the air and then you can take further steps if necessary. 

In 2.4 GHz use channels 1 to 11 which are supported in all countries.

 

 

Userlevel 6
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To configure your controller this two articles can help.

https://extremeportal.force.com/ExtrArticleDetail?an=000080121&q=How%20do%20I%20Create%20a%20WLAN%20on%20my%20WM%20Controller

https://extremeportal.force.com/ExtrArticleDetail?an=000080654&q=How%20do%20I%20Create%20a%20WLAN%20on%20my%20WM%20Controller

 

I tested with inSSIDer app on one of the working windows machine. Please find attached snap. It is showing that my SSID “ProgilityTech” using channel no. 11

 

Thanks Christoph S & StephanH for your help. I disabled 802.11ax feature for 5Ghz frequency band & now able to see the SSID on laptops having issue.

Is there any impact of this related to speed, coverage & security point of view for clients who are now using 5Ghz band? 

Userlevel 6
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Channel 11 is good and should work on any device.

Maybe you are faced with the issue here:

https://www.winhelponline.com/blog/no-wifi-ssid-access-points-found-by-windows-10/

Especially step 8 is easy to try.

Do you have the problem only with WPA-Enterprise SSIDs?

If yes you can try with an WPA-Personal (PreSharedKey) SSID, too.

 

 

 

Userlevel 6
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Oh, I see my last post has overlapped with your answer.

Nice that it works now.

Userlevel 6
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802.11ax focuses mainly on distributing the available bandwidth to multiple clients that do not have large amounts of data to transfer. If your clients do not support 11ax, then you will not lose speed if you only allow 11ac. Also regarding Coverage and Security there is no negativ impact if you support only 11ac.

If you have 11ax and older Clients in parallel and you need 11ax features for the 11ax clients you have separate like 11ax in one frequency band and older clients in the other.

Be aware 11ac is only available in 5 GHz while 11n and 11ax works on both frequencies.

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