Wireless/Redundant Edge Services xl Module Management and Configuration Guide WS.02.xx and greater

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Wireless Network Management
Network Self Healing
Interference Avoidance
Also called dynamic channel selection, interference avoidance helps your RP
radios choose the best channel in your environment at the moment. If the
Wireless Edge Services xl Module detects interference on a radio’s current
channel, it has the radio use Auto-Channel Selection (ACS) to choose a new
channel.
The module implements this procedure for interference avoidance:
1. Every time a wireless station’s packet fails to reach its destination, pre-
sumably because of a collision, the station resends the packet. For each
RP radio, the module tracks the average number of times in the last 30
seconds that stations reattempted to send a packet.
2. If a radio’s average retries exceeds a specified threshold, the module
assumes that the excessive collisions are caused by another device oper-
ating on the same channel. (This could be an RP in another WLAN, a rogue
RP, or even wireless headsets.)
3. The module has the RP radio use ACS to select a new channel based on
the best SNR.
To enable interference avoidance, complete these steps:
1. Select Special Features > Self Healing > Configuration.