topic Re: AP showing high utilization in Wireless

AP showing high utilization

Noovi — Mon, 05 Jul 2021 16:30:09 GMT

Hi Guys,

I am having one Cisco AP of model AIR-AP3702I.

I am observing its channel utilization of band b is showing 70% but no clients are connected to it.

Can anyone tell me why it is showing 70%? ANd if any resolution to reduce it?

(AABZ039) >show ap auto-rf 802.11b APb08b.cf84.e844

Load Information
Load Profile................................. PASSED
Receive Utilization.......................... 0 %
Transmit Utilization......................... 1 %
Channel Utilization.......................... 70 %
Attached Clients............................. 0 clients

Re: AP showing high utilization

Leo Laohoo — Mon, 26 Nov 2018 06:34:17 GMT

@Noovi wrote:

Can anyone tell me why it is showing 70%? ANd if any resolution to reduce it?

Noise from other WiFi and non-WiFi around the AP.

Re: AP showing high utilization

Noovi — Mon, 26 Nov 2018 06:37:09 GMT

Hi,

But how to check that AP channel utilization is incresed due to interference

And what is impact of high AP utilization?

Re: AP showing high utilization

Leo Laohoo — Mon, 26 Nov 2018 06:45:34 GMT

@Noovi wrote:

And what is impact of high AP utilization?

What is the "impact" when you're talking to someone and everyone else is talking but with a LOUDER voice? The result is the same. The wireless client will not be "heard", wireless client will then re-transmit until the message gets through. This means slow wireless speed.

Is 5.0 Ghz not available?

Re: AP showing high utilization

Noovi — Mon, 26 Nov 2018 07:16:39 GMT

Hi,

Yes, 802.11a - 5ghz is there and showing less utilized.

So is there any impact on wireless if 802.11b is highly utilized

(AABZ039) >show ap auto-rf 802.11a APb08b.cf3c.2d64

Load Information
Load Profile................................. PASSED
Receive Utilization.......................... 0 %
Transmit Utilization......................... 0 %
Channel Utilization.......................... 0 %
Attached Clients............................. 1 clients

Re: AP showing high utilization

Scott Fella — Mon, 26 Nov 2018 14:15:29 GMT

High utilization will impact the performance and user experience. Like Leo mentioned, it’s due to surround wireless and or other 2.4ghz interferes. Since 2.4ghz only has 3 non overlapping channels, you will tend to see higher utilization than on the 5GHz.

Do some testing yourself, connect to that AP on 2.4ghz and then on 5GHz and run some Iperf or speed test.

Re: AP showing high utilization

ammahend — Tue, 27 Nov 2018 11:59:25 GMT

Since you have just one AP, manually change th channel to something else which is not busy