MR High Interference

[guitb]

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?

[alemabrahao]

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

[alemabrahao]

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/

[guitb]

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.

[alemabrahao]

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

[guitb]

Here are some screenshots

[alemabrahao]

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.

[guitb]

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.

[alemabrahao]

Channel utilization is very low.

[alemabrahao]

Take a look on the documentation I sent you.

[guitb]

Thank you @alemabrahao 

[cmr]

@guitb 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.

[cmr]

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...

[cmr · Accepted solution]

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

[guitb]

Thank you @cmr !!

[cmr]

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

[Lloydyboy]

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?

[cmr]

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