Avaya AP-5, AP-6 manual Avaya Wireless AP-4/5/6 User’s Guide

Configure Multiple SSID/VLAN/Security Mode Entries

The Rogue AP Scan employs background scanning using low-level

802.11scanning functions for effective wireless detection of Access Points in its coverage area with minimal impact on the normal operation of the Access Point.

This RAD feature can be enabled on an Access Point via its HTTP, CLI, or SNMP Interfaces. The scan repetition duration is configurable. The Access Point will periodically scan the wireless network and report all the available Access Points within its coverage area using SNMP traps. For additional reliability the results are stored in the Access Point in a table, which can be queried via SNMP. The BSSID and Channel number of the detected Access Points are provided in the scan results.

The RAD scan is done on a channel list initialized based on the regulatory domain of the device. The RAD Scan then performs background scanning on all the channels in this channel list using 802.11 MAC scanning functions. It will either actively scan the network by sending probe requests or passively scan by only listening for beacons. The access point information is then gathered from the probe responses and beacons.

To minimize traffic disruption and maximize the scanning efficiency, the RAD feature employs an enhanced background-scanning algorithm and uses the CTS to Self mechanism to keep the clients silent. The scanning algorithm allows traffic to be serviced between each channel scan. Before start of every scan (except scan on the working channel) the CTS to self-mechanism is used to set the NAV values of clients to keep them silent during the scanning period. In addition, the scan repetition duration can also be configured to reduce the frequency of RAD scan cycles to maximize Access Point performance.

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