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show ap spectrum channel-metrics
show ap spectrum channel-metrics {ap-name <ap-name>}|{ip-addr <ip-addr>} freq-band
2.4ghz|5ghz
Description
This command shows channel quality, availability and utilization metrics as seen by a spectrum monitor.
Syntax
Parameter
ap-name <ap-name>
ip-addr <ip-addr>
freq-band
2.4ghz|5ghz
Usage Guideline
This chart displays channel utilization data, showing the percentage of each channel that is currently being used by
Wi-Fi devices, and the percentage of each channel being used by non-Wi-Fi devices and 802.11 adjacent channel
interference (ACI).
NOTE: ACI refers to the interference on a channel created by a transmitter operating in an adjacent channel. A transmitter on a
nonadjacent or partially overlapping channel may also cause interference, depending on the transmit power of the interfering
transmitter and/or the distance between the devices. In general, ACI may be caused by a Wi-Fi transmitter or a non-Wi-Fi interferer.
However, whenever the term ACI appears in Spectrum Analysis graphs, it refers to the ACI caused by Wi-Fi transmitters. The
channel utilization option in the Channel Metrics Chart shows the percentage of the channel utilization due to both ACI and non-Wi-
Fi interfering devices. Unlike the ACI shown in the
indicates the percentage of channel time that is occupied by ACI or unavailable for Wi-Fi communication due to ACI.
The Channel Metrics table can also show channel availability, the percentage of each channel that is available for use,
or display the current relative quality of selected channels in the 2.4 GHz or 5 GHz radio bands. In the spectrum
analysis feature, channel quality is a relative measure that indicates the ability of the channel to support reliable Wi-
Fi communication. Channel quality, which is represented as a percentage in this chart, is a weighted metric derived
from key parameters that can affect the communication quality of a wireless channel, including noise, non-Wi-Fi
(interferer) utilization and duty-cycles, and certain types of retries. Note that channel quality is not directly related
to Wi-Fi channel utilization, as a higher quality channel may or may not be highly utilized.
NOTE: A hybrid AP on a 20 MHz channel will see 40 MHz Wi-Fi data as non-Wi-Fi data.
Examples
The output of this example shows part of the channel metrics table for channels seen by the spectrum monitor
ap123.
(host)# show ap spectrum channel-metrics ap-name ap123 freq-band 2.4GHz
856 | show ap spectrum channel-metrics
Description
Name of the spectrum monitor for which you want to view spectrum information.
IP address of the spectrum monitor.
View information for a specific radio type, either 2.4 GHz or 5 GHz.
show ap spectrum interference-power
output, the ACI shown in this graph
Dell PowerConnect W-Series ArubaOS 6.2 | Reference Guide
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