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Contributor II
Posts: 50
Registered: ‎09-12-2013

operating channel high utilization

I have a new instant environment deployed consisting of all IAP-225's. Over half of my APs are showing high utilization. From what I can see this is refering to the utilization of the channel its operating on. My question is what can I do to resolved this issue?

 

It is worth noting that these are deployed in a campus where 2 companies exist.  We are company one and company two has there own wireless network deployed using cisco waps.

Guru Elite
Posts: 8,633
Registered: ‎09-08-2010

Re: operating channel high utilization

Are you seeing this in both bands or only 2.4?

Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
MVP
Posts: 4,301
Registered: ‎07-20-2011

Re: operating channel high utilization

The utilization could for a number of things:
- To many APs using the same channels or too close to each other
- Wireless devices taking to long transmit
- the power on your APs are too high
- Too many SSIDs

The show ap arm history and rf summary should give an idea of what's going on in your RF environment
You should also consider turning on drop broadcast / multicast if your company is not using any applications that requires multicast
Thank you

Victor Fabian
Lead Mobility Engineer @ Integration Partners
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
Contributor II
Posts: 50
Registered: ‎09-12-2013

Re: operating channel high utilization

from what I can see its 2.4

Contributor II
Posts: 50
Registered: ‎09-12-2013

Re: operating channel high utilization

ran the commands you suggested and it confirms that something is going on. I see it changing chanel and power increase/decrease:

 

Interface :wifi0
ARM History
-----------
Time of Change Old Channel New Channel Old Power New Power Reason
-------------- ----------- ----------- --------- --------- ------
2014-09-15 15:38:41 36E 36E 18 15 P-
2014-09-15 06:47:45 149E 36E 18 18 I
2014-09-15 06:41:34 36E 149E 18 18 I
2014-09-15 06:36:51 149E 36E 18 18 I
2014-09-15 06:32:30 36E 149E 18 18 I
2014-09-15 06:26:40 149E 36E 18 18 I
2014-09-15 06:21:04 36E 149E 18 18 I
2014-09-15 06:05:49 149E 36E 18 18 I
2014-09-15 06:01:22 36E 149E 18 18 I
2014-09-15 05:57:13 149E 36E 18 18 I
2014-09-15 05:55:32 149E 149E 21 18 P-
2014-09-15 05:50:12 149E 149E 18 21 P+
2014-09-15 05:43:12 36E 149E 18 18 I
2014-09-15 05:37:17 149E 36E 18 18 I
2014-09-15 05:29:55 36E 149E 18 18 I
2014-09-15 05:25:08 149E 36E 18 18 I
2014-09-15 05:18:31 36E 149E 18 18 I
2014-09-15 05:08:14 149E 36E 18 18 I
2014-09-15 04:46:16 36E 149E 18 18 I
2014-09-15 04:41:36 149E 36E 18 18 I
2014-09-15 04:35:56 36E 149E 18 18 I
2014-09-15 04:27:57 149E 36E 18 18 I
2014-09-15 04:20:57 36E 149E 18 18 I
2014-09-15 04:13:34 149E 36E 18 18 I
2014-09-15 04:07:43 36E 149E 18 18 I
2014-09-15 04:03:34 149E 36E 18 18 I
2014-09-15 03:59:05 36E 149E 18 18 I
2014-09-15 03:51:49 149E 36E 18 18 I
2014-09-15 03:47:35 36E 149E 18 18 I
2014-09-15 03:41:01 149E 36E 18 18 I
2014-09-15 03:35:44 36E 149E 18 18 I
2014-09-15 03:13:26 149E 36E 18 18 I
Interface :wifi1
ARM History
-----------
Time of Change Old Channel New Channel Old Power New Power Reason
-------------- ----------- ----------- --------- --------- ------
2014-09-15 14:42:49 6 6 21 18 P-
2014-09-15 14:24:05 6 6 18 21 P+
2014-09-15 13:42:34 6 6 21 18 P-
2014-09-15 13:34:11 6 6 18 21 P+
2014-09-15 12:59:54 6 6 21 18 P-
2014-09-15 12:52:19 6 6 18 21 P+
2014-09-15 11:57:36 6 6 21 18 P-
2014-09-15 11:45:22 6 6 18 21 P+
2014-09-15 11:34:52 6 6 21 18 P-
2014-09-15 11:16:42 6 6 18 21 P+
2014-09-15 11:02:35 6 6 21 18 P-
2014-09-15 10:19:45 6 6 18 21 P+
2014-09-15 10:15:14 6 6 21 18 P-
2014-09-15 09:52:33 6 6 18 21 P+
2014-09-15 05:59:17 11 6 18 18 I
2014-09-15 05:16:36 1 11 18 18 I
2014-09-15 05:03:17 11 1 18 18 I
2014-09-15 04:24:06 1 11 18 18 I
2014-09-15 04:17:52 6 1 18 18 I
2014-09-15 04:05:17 1 6 18 18 I
2014-09-15 01:54:02 11 1 18 18 I
2014-09-15 01:43:02 1 11 18 18 I
2014-09-15 01:23:20 11 1 18 18 I
2014-09-15 01:17:58 6 11 18 18 I
2014-09-15 00:06:40 1 6 18 18 I
2014-09-14 23:12:42 6 1 18 18 I
2014-09-14 22:43:48 1 6 18 18 I
2014-09-14 22:05:48 11 1 18 18 I
2014-09-14 19:45:46 1 11 18 18 I
2014-09-14 19:38:42 11 1 18 18 I
2014-09-14 19:34:18 6 11 18 18 I
2014-09-14 18:26:42 1 6 18 18 I

MVP
Posts: 4,301
Registered: ‎07-20-2011

Re: operating channel high utilization

Your minimum power level seem to be on 18 you should consider lowering it , I see that there's a lot of interference on both bands but first look at your AP layout before making that change so don't leave any dead spots
Thank you

Victor Fabian
Lead Mobility Engineer @ Integration Partners
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
MVP
Posts: 4,301
Registered: ‎07-20-2011

Re: operating channel high utilization

I see also that you have 80 MHz channels enabled ?
Thank you

Victor Fabian
Lead Mobility Engineer @ Integration Partners
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
Contributor II
Posts: 50
Registered: ‎09-12-2013

Re: operating channel high utilization

This is a brand new install and most of the factory defaults are being used at this time

Contributor II
Posts: 50
Registered: ‎09-12-2013

Re: operating channel high utilization

I set the min power to 15 so we will see how it looks over the next day or two.

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