Reference Guide

742 | show ap spectrum channel-metrics Dell PowerConnect W-Series ArubaOS 6.1 CLI | Reference 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
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).
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.
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.
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 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.