Re: RSSI to SNR

Moudar · ‎02-21-2023

Hi,

2 clients (IPADS) connect with 2,4 Ghz. How they get -71 RSSI while SNR is 59?!

Is there any explanation to this?

Moudar · ‎02-21-2023

Do these logs have any bad effect on the APs efficiency?

Feb 22 07:22:46 kernel: [*02/22/2023 07:22:46.0878] +000000001
Feb 22 07:22:46 kernel: [*02/22/2023 07:22:46.0881] +000000001
Feb 22 07:22:46 kernel: [*02/22/2023 07:22:46.1498] Interfacing with unit 1
Feb 22 07:22:46 kernel: [*02/22/2023 07:22:46.1498] +000000001
Feb 22 07:22:46 kernel: [*02/22/2023 07:22:46.1501] +000000001
Feb 22 07:22:55 kernel: [*02/22/2023 07:22:55.5111] Interfacing with unit 1
Feb 22 07:22:55 kernel: [*02/22/2023 07:22:55.5111] +000000001
Feb 22 07:22:55 kernel: [*02/22/2023 07:22:55.5114] +000000001
Feb 22 07:22:55 kernel: [*02/22/2023 07:22:55.5722] Interfacing with unit 1
Feb 22 07:22:55 kernel: [*02/22/2023 07:22:55.5722] +000000001
Feb 22 07:22:55 kernel: [*02/22/2023 07:22:55.5725] +000000001
Feb 22 07:23:04 kernel: [*02/22/2023 07:23:04.9345] Interfacing with unit 1
Feb 22 07:23:04 kernel: [*02/22/2023 07:23:04.9345] +000000001
Feb 22 07:23:04 kernel: [*02/22/2023 07:23:04.9348] +000000001
Feb 22 07:23:05 kernel: [*02/22/2023 07:23:04.9986] Interfacing with unit 1
Feb 22 07:23:05 kernel: [*02/22/2023 07:23:04.9986] +000000001
Feb 22 07:23:05 kernel: [*02/22/2023 07:23:04.9990] +000000001
Feb 22 07:23:14 kernel: [*02/22/2023 07:23:14.3577] Interfacing with unit 1
Feb 22 07:23:14 kernel: [*02/22/2023 07:23:14.3577] +000000001
Feb 22 07:23:14 kernel: [*02/22/2023 07:23:14.3581] +000000001
Feb 22 07:23:14 kernel: [*02/22/2023 07:23:14.4213] Interfacing with unit 1
Feb 22 07:23:14 kernel: [*02/22/2023 07:23:14.4213] +000000001
Feb 22 07:23:14 kernel: [*02/22/2023 07:23:14.4216] +000000001
Feb 22 07:23:21 kernel: [*02/22/2023 07:23:21.4670]
Feb 22 07:23:21 kernel: [*02/22/2023 07:23:21.4671]  *** RSN ERROR: Received a data frame when no keys are plumbed
Feb 22 07:23:21 kernel: [*02/22/2023 07:23:21.4685]
Feb 22 07:23:21 kernel: [*02/22/2023 07:23:21.4685]  *** RSN ERROR: Received a data frame when no keys are plumbed
Feb 22 07:23:21 kernel: [*02/22/2023 07:23:21.4717]
Feb 22 07:23:23 kernel: [*02/22/2023 07:23:21.4717]  *** RSN ERROR: Received a data frame when no keys are plumbedInterfacing with unit 1
Feb 22 07:23:23 kernel: [*02/22/2023 07:23:23.7821] +000000001
Feb 22 07:23:23 kernel: [*02/22/2023 07:23:23.7825] +000000001
Feb 22 07:23:23 kernel: [*02/22/2023 07:23:23.8432] Interfacing with unit 1
Feb 22 07:23:23 kernel: [*02/22/2023 07:23:23.8432] +000000001
Feb 22 07:23:23 kernel: [*02/22/2023 07:23:23.8435] +000000001
Feb 22 07:23:33 kernel: [*02/22/2023 07:23:33.2048] Interfacing with unit 1
Feb 22 07:23:33 kernel: [*02/22/2023 07:23:33.2048] +000000001
Feb 22 07:23:33 kernel: [*02/22/2023 07:23:33.2052] +000000001
Feb 22 07:23:33 kernel: [*02/22/2023 07:23:33.2659] Interfacing with unit 1
Feb 22 07:23:33 kernel: [*02/22/2023 07:23:33.2659] +000000001
Feb 22 07:23:33 kernel: [*02/22/2023 07:23:33.2662] +000000001
Feb 22 07:23:42 kernel: [*02/22/2023 07:23:42.6327] Interfacing with unit 1
Feb 22 07:23:42 kernel: [*02/22/2023 07:23:42.6327] +000000001
Feb 22 07:23:42 kernel: [*02/22/2023 07:23:42.6330] +000000001
Feb 22 07:23:42 kernel: [*02/22/2023 07:23:42.6890] Interfacing with unit 1
Feb 22 07:23:42 kernel: [*02/22/2023 07:23:42.6890] +000000001
Feb 22 07:23:42 kernel: [*02/22/2023 07:23:42.6894] +000000001

JPavonM · ‎02-22-2023

The explanation to that output is that in that 2.4 GHz channel the noise is really low, and even been unlikely to have a background noise as low as -130 dBm, it may happen.

Double check that with anotehr device (iPad or whatever) to validate it, if the same results happen, then the wNIC from that device maybe faulty.

Moudar · ‎02-22-2023

Any idea about these logs?

The AP generate these logs all the time, the problem is that the internet become very slow when about 20 Ipads connect to the AP

JPavonM · ‎02-22-2023

If those 20 ipads are raising the channel utilisation due to a high traffic load then that is normal, are you able to monitor that traffic load from the devices?. Check if any other AP is on the same channel, not only from your infrastructure, but from any overlapped BSS (neighbour netwroks) as channel utilisation and transmission performance is a question about shared spectrum and not only your 20 devices.