Users Guide

Troubleshooting Spectrum Analysis
Verifying Spectrum Monitors Support for One Client per Radio
Each spectrum monitor radio can only send information to one client at a time. If you log into a controller and
the spectrum monitor dashboard does not display any data for the selected radio, another user may be logged
in to the controller at that time. Note that dual-radio spectrum monitors may be accessed by two clients; one
client for each radio.
Converting a Spectrum Monitor Back to an AP or Air Monitor
If want to convert a spectrum monitor radio back to AP or AM mode but the radio still comes up as a spectrum
monitor, access the command-line interface and see if that spectrum monitor appears in the output of the
show ap spectrum local-override command. If the spectrum monitor does appear in the local override
profile table, issue the command ap spectrum local-override no override ap-name <apame> spectrum-
band <spectrum-band> to remove the local override for that spectrum monitor and return the radio to AP or
AM mode.
Troubleshooting Browser Issues
If you access the spectrum analysis dashboard using the Safari 5.0 browser, clicking the backspace button may
return you to the previous browser screen. Avoid using the backspace button when changing dashboard view
names or chart options.
If you are recording spectrum analysis data or playing back a spectrum analysis recording using a Mac client, do
not minimize the browser window while the recording is in progress, as that may cause the Adobe Flash player
to pause.
Loading a Spectrum View
Saved spectrum view preferences may not be backwards compatible with the spectrum analysis dashboard in
earlier versions of ArubaOS. If you downgrade to an earlier version of ArubaOS and your client is unable to load
a saved spectrum view in the spectrum dashboard, access the CLI in enable mode and issue the command ap
spectrum clear-webui-view-settings to delete the saved spectrum views and display default view settings
in the spectrum dashboard.
Troubleshooting Issues with Adobe Flash Player 10.1 or Later
Removing focus from the browser window displaying the spectrum analysis dashboard may cause Adobe Flash
10.1 or later to stop updating the spectrum charts to reduce CPU usage. When you restore focus to the
spectrum analysis dashboard, you may see the spectrum charts update rapidly as the display catches up.
Recorded data may be inaccurate if you navigate away from the spectrum window during a recording. Flash
10.0 does not have this issue.
Understanding Spectrum Analysis Syslog Messages
The spectrum analysis feature can send four different types of syslog messages: wifi add, wifi delete, non-wifi
add, and non-wifi delete. All messages are in the wireless category at the syslog severity level NOTICE.
The four syslog message types appear in the following formats:
l AM: Spectrum: new wifi device found = [addr:%s] SSID = [ssid:%s] BSSID [bssid_str:%s] DEVICE ID [did:%d]
l AM: Spectrum: deleting wifi device = [addr:%s] SSID = [ssid:%s] BSSID [bssid_str:%s] DEVICE ID [did:%d]
l AM: Spectrum: new non-wifi device found = DEVICE ID [did:%u] Type [dytpe:%s] Signal [sig:%u] Freq
[freq:%u]KHz Bandwidth [bw:%u]KHz
l AM: Spectrum: deleting non-wifi device = DEVICE ID [did:%d] Type [dtype:%s]
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