Hight channel Utilization

itcrt

Low local connection speed, and the last 2 days everything is very bad. It is not possible to use wifi. The speed through the cable is very high. Help solve this problem. The problems started after installing the update.

Jamiewyc

Jamiewyc

Also having the same issue… turning down 2.4 hasn't made any different whatsoever…

Zyxel_Judy

Hi there,

High channel utilization often indicates significant interference within your network environment. To potentially resolve this issue, you may adjust specific settings related to the radio channel width and DCS same to the image below.

After making these changes, monitor the channel utilization metrics to see if there is an improvement in network performance.

Jamiewyc

Hi,

We have the same settings as you apart from only three channel deployment. Changing to four channel or all channels available does indeed reduce channel utilization slightly but we then end up with incredibly unstable wifi that's close to unusable. Is there anything else you can recommend please?

itcrt

https://community.zyxel.com/en/discussion/comment/56623#Comment_56623

I also tested those Wi-Fi settings that were not suitable

itcrt

https://community.zyxel.com/en/discussion/comment/56621#Comment_56621

it did not help us, we already had such settings, at 20 MHz, the Internet and Wi-Fi fail

Zyxel_Judy

Hi there,

Please refer to the FAQ to optimize wireless performance. If issues persist after following all configurations, please provide the org/site name, AP MAC address, client MAC address, SSID, and connection time. You can drop the info via the private message by clicking my account > Message.

https://community.zyxel.com/en/discussion/18779/how-to-resolve-the-low-throughput-despite-strong-signal

Jamiewyc

Hi Judy,

Thank you for this, though whilst helpful, in itself proves there's some issues that need to be addressed here:

You mention about using a channel analyser in order to find interference, but Nebula does not show the same/correct MAC address - they appear differently in each of the analysers I've tried. How am I able to find co-channel interference if Nebula is not reporting the same MAC address as the channel analyser?

Additionally, I do not understand why turning off 2.4ghz and 5ghz transmission on individual AP's is not possible - If we're trying to reduce co-channel interference and we can't stop an AP from broadcasting, there's nothing we can do. Support mentioned splitting the SSID into two separate 2.4ghz and 5ghz SSID but this is not possible due to the following:

Nebula only allows for 8 SSIDs. I currently have 4 and splitting them would effectively stop me from creating any temporary SSID's that we use (For example, Summer school).
Nebula only allows the creation of 1 SSID with guest vouchers enabled - meaning I wouldn't even be able to split the guest wifi to 2.4 and 5ghz SSIDs. 

itcrt

I also don't understand why I can't turn off the SSID at separate Wi-Fi access points. Jamiewyc, useful things to say.

Zyxel_Judy

Hi @itcrt ,

The SSID tag function allows users to activate or deactivate the SSID on individual Wi-Fi access points. For detailed configuration instructions, please refer to the following FAQ:

https://community.zyxel.com/en/discussion/756/nebula-how-can-i-configure-to-separate-ssids-between-naps