802.11 Radio Counters Summary; Radio Statistics Interactive Graphs - Dell PowerConnect W-Airwave User Manual

These issues highlighted in this section can be examined in detail using the corresponding interactive graphs on
the same page. See the

802.11 Radio Counters Summary

This table appears for radios with 802.11 counters and summarizes the number of times an expected
acknowledgement frame was not received, the number of duplicate frames, the number of frames containing
Frame Check Sequence (FCS) errors, and the number of frame/packet transmission retries and failures. These
aggregate error counts are broken down by Current, Last Hour, Last Day, and Last Week time frames, as
illustrated in
Figure 84 802.11 Radio Counters Summary table
The frame- per-second rate of these and other 802.11 errors over time are tracked and compared in the 802.11
Counters graph on the same page.

Radio Statistics Interactive Graphs

Time-series graphs for the radio are displayed across a tabbed, dual-pane interface to show changes recorded at
every polling interval over time. Users and Bandwidth data are polled based on the AP's group's User Data Polling
Period. Channel, Noise, and Power are based on AP Interface Polling Period. 802.11 Counters data are based on
the AP's group's 802.11 Counters Polling Period.
You can adjust the attributes of these graphs as follows:
Drag the horizontal slider under the graphs to move the scope of all graphs between one year ago and the

current time.
Drag the vertical slider between graphs to change the relative width of each.

The Show All link displays all of the available data series.

The bar-graph icon on the upper right-hand corner of each graph opens a new window and displays all data

series for the selected graph over the last two hours, last day, last week, last month, and last year in one page.
The graphs that display depend on the AP and/or its controller.
Select the checkbox next to any metric to remove its data from the graph. Select Collapse to remove

unchecked metrics from the legend, and Show All to restore them.
The two graph panes enable simultaneous display of two different information sets, as detailed in :
Table 78 Radio Statistics Interactive Graphs Descriptions
Graph Title
Users
Bandwidth
Channel
Noise
Dell PowerConnect W-AirWave | User Guide
Radio Statistics Interactive Graphs
Figure 84.
Description
A line graph that displays the maximum users associated to the corresponding radio at polling intervals
over the time range set in the slider. Select Show All for other metrics such as average users and max
users for various individual devices.
An area graph displaying the average bandwidth in each direction for the radio. Select Show All for other
metrics such as max bandwidth in and out, average and max mesh/overhead or overhead bandwidth, and
average/max Enet0.
An area graph that displays the channel changes (if any) of the radio over time. Frequent, regular channel
changes on a Dell PowerConnect W-Series or Cisco WLC AP radio usually indicate that the Adaptive
Radio Management feature (ARM) in AOS is compensating for high noise levels from interfering devices.
An area graph that displays signal interference (noise floor) levels in units of dBm. Noise from interfering
devices above your AP's noise threshold can result in dropped packets. For ARM-enabled Dell
PowerConnect W-Series APs, crossing the noise threshold triggers an automatic channel change.
section of this chapter for details.
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