Unstable Wifi

Dpj · September 30

hello all.

We have placed a few months ago an complete new network at a customer.

We only use zyxel devices, connected to nebula.

We have issues with the wifi. Last week i was at the customer site, and i was connected to the wifi. One moment i had 80mbps up/down, the following moment i just had something beteween 0,8 and 3 mbps. The next moment 80 again.

I'm reviewing the logging. And what i see is from time to time an reason 5 error message in the nebula logging. We have placed 4 wifi devices at this side, and i got the reason 5 from multiple devices.

I have to find out what i can do about this error. It seems the accesspoint is to busy to handle all the traffic.

for your information:

the device is an NWA1123-AC PRO. I see the messages as wel from the 2.4 as the 5 ghz.

I also see reason 3 messages, but that has only to do with roaming from 1 accesspoint to the other Access point?

thx for your help and support.

Zyxel_Kay · November 11

Hi @jpblanch75

To assist further, could you let us know if there’s a specific aspect of the issue you'd like us to revisit or if any new symptoms have appeared since your last post? We'll do our best to dive deeper into the potential causes and work with you toward a resolution.

Zyxel_Kay · October 1

Hi @Dpj

The "Reason 5" errors in your Nebula logs indicate that the access point (AP) disassociated your device because it may be overwhelmed by traffic or too many devices connected simultaneously. This can be caused by high client density, excessive traffic, or suboptimal AP placement.

Regarding the "Reason 3" messages, these typically occur during normal roaming when a device disconnects from one AP to connect to another. However, if the device is far from the AP or obstructed by walls or other interference sources, it can also cause these errors.

Here are a few suggestions to help improve your network performance:

AP Placement: We recommend placing indoor APs every 15 meters as a general guideline, but the actual distance depends on the environment and traffic. You can refer to this post for more information:
- How Do I Know Where to Place My AP and How Many Do I Need? — Zyxel Community
Managing Traffic: If you have many devices connected, consider managing the number of concurrent connections or applying speed rate limits to avoid congestion:
- [Nebula] How to Limit the Wireless Clients' Speed? — Zyxel Community
Interference: Make sure your APs are positioned away from potential sources of interference. This post explains common causes of WiFi interference:
- Common Causes of WiFi Interference — Zyxel Community
Bandwidth Availability: Check that your network infrastructure (router, modem, firewall) has enough bandwidth to handle the traffic load. If your traffic is consistently high, consider upgrading your network equipment or internet plan.
Optimizing Nebula AP: You can follow these guidelines to optimize your AP settings for better WiFi performance:
- How to Optimize Wi-Fi Connectivity with Nebula AP? — Zyxel Community

If you've tried these optimizations and are still experiencing issues, please enable Zyxel Support on Nebula Control Center (NCC) and provide us with your organization and site name. Additionally, it would be helpful to know which device(s) (e.g., MAC address) are having connectivity difficulties. You can share this information via private message for privacy reasons.

Dpj · October 1

Thank you for your information, tomorrow we will take a look at it remote! i will keep you informed!

jpblanch75 · November 1

I have similar issues on the 2.4 band. I've been bring this up for quite a while but its not taken seriously.

Zyxel_Kay · November 1

Hi @jpblanch75

To assist you further, could you please provide a few more details?

Which device model are you using?
Could you describe the specific symptoms you’re experiencing, and in what ways they seem similar to those in this thread?
How is your access point managed—standalone, through Nebula, or via a controller? If managed through Nebula, could you enable Zyxel Support access and provide your organization and site name?

With this information, we’ll be able to investigate more effectively.

jpblanch75 · November 2

https://community.zyxel.com/en/discussion/comment/71323#Comment_71323

You can see it here:

https://community.zyxel.com/en/discussion/23296/i-now-have-2-nwa130be-aps-and-1-nwa50ax-pro

Zyxel_Kay · November 4

Hi @jpblanch75

After reviewing the forum thread you mentioned, it appears that the client's disconnection from the access point is due to the client device itself. Specifically, disconnection reason 8 indicates "Disassociated because sending STA is leaving (or has left) BSS," meaning the client device initiated the disconnection.

In that thread, however, the original poster experienced reasons 5 and 3, which differ from your case. These reasons are more related to network traffic and environmental factors. You may consider sharing more details in that thread, as it will provide our team or other users with a clearer understanding to assist you further.

jpblanch75 · November 10

https://community.zyxel.com/en/discussion/comment/71391#Comment_71391

I've shared a lot in my opinion….. it got no where.

Zyxel_Kay · November 11

Hi @jpblanch75

To assist further, could you let us know if there’s a specific aspect of the issue you'd like us to revisit or if any new symptoms have appeared since your last post? We'll do our best to dive deeper into the potential causes and work with you toward a resolution.

Unstable Wifi

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