topic Re: MR High Interference in Wireless

MR High Interference

guitbbb — Fri, 28 Feb 2025 13:11:34 GMT

I have a branch with a single Meraki MR access point, and it is reporting 'High Interference' on the RF Spectrum under 'AP Neighbors by RSSI'.

The dashboard indicates 'same channel interference,' but there is only one MR deployed at this location.

Additional details:

Frequency: 5 GHz
Channel: 149 (80 MHz band)

Could someone help me understand why it is showing high interference when it is the only access point in use?

Re: MR High Interference

aleabrahao — Fri, 28 Feb 2025 13:31:02 GMT

The interference is caused by other neighboring APs in the vicinity.

Are you using static or automatic channel assignment?

https://documentation.meraki.com/MR/Monitoring_and_Reporting/AP_Neighbors

Re: MR High Interference

aleabrahao — Fri, 28 Feb 2025 13:34:21 GMT

Another thing, avoid using a channel width of 80 MHz, use a maximum of 40 MHz.
Because you are considerably reducing the number of available channels by using a width of 80 MHz.

https://www.ekahau.com/blog/channel-planning-best-practices-for-better-wi-fi/

Re: MR High Interference

guitbbb — Fri, 28 Feb 2025 13:39:05 GMT

I am using AUTO channel assignment. Interestingly, when I check the 'AP Neighbors by RSSI,' it appears as though the MR is causing interference with itself, which seems illogical.

Re: MR High Interference

aleabrahao — Fri, 28 Feb 2025 13:40:44 GMT

Are you sure about this? Can you share a screenshot?

Re: MR High Interference

guitbbb — Fri, 28 Feb 2025 13:56:02 GMT

Here are some screenshots

Re: MR High Interference

aleabrahao — Fri, 28 Feb 2025 14:00:52 GMT

I don't see any indication of what was said and the channel utilization is low at just over 5%.

Are you having any problems?

As said, avoid using a channel width of 80 MHz, use a maximum of 40 MHz.

Re: MR High Interference

guitbbb — Fri, 28 Feb 2025 14:06:19 GMT

I'm not sure why the MR isn't switching channels. If the interference is coming from an external device, it should automatically move to a different channel to avoid it.

Re: MR High Interference

aleabrahao — Fri, 28 Feb 2025 14:14:27 GMT

Channel utilization is very low.

Re: MR High Interference

aleabrahao — Fri, 28 Feb 2025 14:17:44 GMT

Take a look on the documentation I sent you.

Re: MR High Interference

guitbbb — Fri, 28 Feb 2025 16:23:37 GMT

Thank you @alessandrodematos

Re: MR High Interference

CMR — Sat, 01 Mar 2025 22:09:04 GMT

I called out this to the support team as a bug some time ago and thought it had been fixed. I'd definitely argue that flagging the AP as interfering with itself isn't helpful...

Re: MR High Interference

CMR — Sat, 01 Mar 2025 22:12:59 GMT

Yes, definitely still broken, all my APs show 30dBm interference from themselves (long with the correct ~80dBm interference from a neighbour AP. 🤦🏻‍♂️

Re: MR High Interference

CMR — Sat, 01 Mar 2025 22:19:53 GMT

@guitbbb there is no actual interference, it is a GUI bug. I've raised another support case and referenced the one from September where I originally flagged it.

Re: MR High Interference

CMR — Mon, 03 Mar 2025 23:33:33 GMT

Support confirmed today that it is a known GUI bug that is being worked on.

Re: MR High Interference

guitbbb — Tue, 04 Mar 2025 17:05:01 GMT

Thank you @CMR !!

Re: MR High Interference

lloydyboy1 — Thu, 13 Mar 2025 13:15:16 GMT

Hiya, have been following this thread as noticed the same. So does that mean there no interference or that there is interference just not coming from itself?

Re: MR High Interference

CMR — Thu, 13 Mar 2025 16:33:58 GMT

In my case there is no interference, it is simply including it's own signal in the interference graphs.