SNMP wlan utilization rate

[scliffe]

I'm trying to understand the hrSysWlanUtilizationRate SNMP object. The description in the MIB file says "the field indicates the wlan Utilization Rate based on
calculating station access Time" so I would expect it to vary quite a bit but when I graph it it looks like this:

This is not what I expected so can anyone explain what this field actually is?

Thanks,

Steve.

[RaghuHR · Accepted solution]

Hi scliffe

We found issue in the driver code and patch is available. Please contact Netgear Support Engineer  to get the patch.

Thanks

Raghu

[thcheng]

Hi,

Are you using the WAC720 as a standalone or controller mode?

Thanks,

Thomas

[scliffe]

No - it's a standalone WNAP320 on the latest firmware.

[awaghe]

Hi scliffe,

The hrSysWlanUtilizationRate SNMP object indicates the percentage of WLAN utilization with respect to number of wireless stations accessing the WLAN and the total time wireless stations accessing the WLAN.

--

Thanks,

AWaghe

[scliffe]

Thanks @awaghe - I'm aware of the description of this object but it doesn't seem to match what it looks like when graphed. It increases gradually over a few hours then drops to zeo and starts again. My Wireless devices are certainly not access the WLAN in that manner.

Steve.

[kohdee]

Just curious, is that correlating with your AP's uptime? 

[scliffe]

A good suggestion, but no. My AP has been up for almost a week and this is occuring regularly 2-3 times/day:

[UDP: [192.168.128.254]:161->[0.0.0.0]:42517]=>[Linux wlan-ap 2.6.23-WNAP320_V3.5.6.0-g0c2ca724 #1 Tue Apr 12 03:19:54 PDT 2016 mips] Up: 6 days, 17:57:42.78

[RaghuHR]

Can you please tell me the application name that you are running to measure WLAN utilization? 

When AP fails to fetch values from database this can happen. 

[scliffe]

I'm using collectd (https://collectd.org/) with the SNMP plugin. I'm also collecting WLAN clients and CPU utilization from the AP and these graphs look fine.

[RaghuHR · Accepted solution]

Hi scliffe

We found issue in the driver code and patch is available. Please contact Netgear Support Engineer  to get the patch.

Thanks

Raghu

[scliffe]

Thanks. I have created a support ticket requesting access to the patch/firmware update.