Bad SNR on our customer Wifi based on cnPilot E600

Hello,

We deployed 12 cnPilotE600 for one of our customers. We did not done optimization et tunning yet, and we have very bad SNR (see cnMaestro printscreen).

Has anyone encoutered this kind of problem? which solutions had you applied?

Thanks by advance.

Bocar

It looks like 5GHz band is being under used. It appears you have 3 clients on the 5GHz channels and around 30 clients on the 2.4GHz spectrum.

The 5GHz spectrum will typically have a much lower noise floor due to the larger number of channels available to you.

To encourage the use of the 5GHz band look into band steering and maybe looks to reduce the power output of your 2.4GHz radios (maybe even turn some off all together).

You can also reduce the channel width of the APs to reduce the noise floor, by default Cambium APs are set to 80MHz wide channels on the 5GHz band, reducing this to 20/40 MHz wide channels will reduce the noise floor.

Also look into the channels that are in use, it appears that channel 36 is being used by 5 APs and channel 48 is being used by 5 APs as well. The channels use should normally be much more varied to avoid co-channel interference.

Personally I do the follow in order:

  1. Reduce channel widths.
  2. Move APs to different channels to avoid co-channel interference (also consider other nearby APs not just your own).
  3. Monitor the network and see if more clients start to connect the 5GHz network.
  4. If your problem is not resolved reduce power on 2.4GHz radios (where appropriate).
  5. Monitor the network and see if more clients start to connect the 5GHz network.
  6. Enable band steering
  7. Monitor the network and see if more clients start to connect the 5GHz network AND make sure band steering isn't causing you any issues (as it dosn't always play nice with some client devices.

Good luck and let us know how you get on.

Thank you for your help