Dell PowerConnect W-Airwave 7.2 Instrukcja Użytkownika Strona 125

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Dell PowerConnect W AirWave 7.2 | User Guide Discovering, Adding, and Managing Devices | 125
Figure 83 Radio Statistics Interactive Graphs Illustration – Bandwidth and 802.11 Counters displayed
Recent ARM Events Log
If this radio references an active and enabled ARM profile, and if your AMP is enabled as a trap host (see Best
Practices Guide in Home > Documentation for instructions), ARM-initiated events such as automatic channel
changes, power changes, and mode changes are displayed in the ARM Events table with the original and modified
values; these values can be selected for filtering the results. You can export the table in CSV format. The columns
and values are described in Table 80Figure 84, and illustrated in Figure 84.
Channel An area graph that displays the channel changes (if any) of the radio over time. Frequent, regular channel
changes on an Dell 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.
Noise 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 APs,
crossing the noise threshold triggers an automatic channel change.
Power A line graph that displays the average and maximum radio transmit power, between 0 and 30 dBm, over
the time range set in the slider. You can adjust the transmit power manually in the APs/Devices > Manage
page for this radio's AP, or enable ARM on Dell APs to dynamically adjust the power toward your
acceptable Coverage Index as needed. See the "Adaptive Radio Management" chapter of the ArubaOS
User Guide in support.dell.com/manuals for more information.
MAC/Phy Errors A line graph displaying the frame reception rate, physical layer error rate (resulting from poor signal
reception or broken antennas), and the data link (MAC) layer (corrupt frames, driver decoding issues) for
the radio.
802.11 Counters A line graph that displays statistics such as frame rate, fragment rate, retry rate, duplicate frame rate, and
other metrics tracked by 802.11 counters. 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.
Table 79 Radio Statistics Interactive Graphs Descriptions (Continued)
Graph Title Description
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