Concept Guide

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 Description
ap-name <ap-name>
Name of the spectrum monitor for which you want to view spectrum
information.
ip-addr <ip-addr>
IP address of the spectrum monitor.
freq-band 2.4ghz|5ghz
View information for a specific radio type, either 2.4 GHz or 5 GHz.
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).
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
show ap spectrum interference-power output, the ACI shown in this graph 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.
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.
Dell Networking W-Series ArubaOS 6.5.x | Reference Guide show ap spectrum channel-metrics | 1279