User's Manual

Wireless Array
460
Array Monitor and Radio Assurance Capabilities
All models of the Wireless Array have integrated monitoring capabilities to check
that the Array’s radios are functioning correctly, and act as a threat sensor to
detect and prevent intrusion from rogue access points.
Enabling Monitoring on the Array
Any radio IAP abgn2 may be set to monitor th
e Array or to be a normal IAP radio.
In order to enable the functions required for intrusion detection and for
monitoring the other Array radios, you must configure one monitor radio on the
IAP Settings window as follows:
 Check the Enabled checkbox.
 Set Mode to Monitor.
 Set Channel to Monitor.
The settings above will automatically set the Antenna selection to
Internal-Omni., also required for monitoring. See the “IAP Settings” on page 274
for more details. The values above are the factory default settings for the Array.
How Monitoring Works
When the monitor radio has been configured as just described, it performs these
steps continuously (24/7) to check the other radios on the Array and detect
possible intrusions:
1. The monitor radio scans all channels with a 200ms dwell time, hitting all
channels about once every 10 seconds.
2. Each time it tunes to a new channel it sends out a probe request in an
attempt to smoke out rogues.
3. It then listens for all probe responses and beacons to detect any rogues
within earshot.
4. Array radios respond to that probe request with a probe response.
Intrusion Detection is enabled or disabled separately from monitoring. See Step 1
in “Advanced RF Settings” on page 313.