Configuring 802.11 Bands

Band selection enables client radios that are capable of dual-band (2.4- and 5-GHz) operation to move to a less congested 5-GHz access point. The 2.4-GHz band is often congested. Clients on this band typically experience interference from bluetooth devices, microwave ovens, and cordless phones as well as co-channel interference from other access points because of the 802.11b/g limit of three non-overlapping channels. To prevent these sources of interference, and improve overall network performance, you can configure band selection on the device, on the Configure > Wireless Advanced > Band Select page.

1. In the Cycle Count field, enter a value between 1 and 10. The cycle count sets the number of suppression cycles for a new client. The default cycle count is 2.
2. In the Cycle Threshold (milliseconds) field, enter a value between 1 and 1000 milliseconds for the scan cycle period threshold. This setting determines the time threshold during which new probe requests from a client come from a new scanning cycle. The default cycle threshold is 200 milliseconds.
3. In the Age Out Suppression (seconds) field, enter a value between 10 and 200 seconds. Age-out suppression sets the expiration time for pruning previously known 802.11b/g/n clients. The default value is 20 seconds. After this time elapses, clients become new and are subject to probe response suppression.
4. In the Age Out Dual Band (seconds) field, enter a value between 10 and 300 seconds. The age-out period sets the expiration time for pruning previously known dual-band clients. The default value is 50 seconds. After this time elapses, clients become new and are subject to probe response suppression.
5. Click Apply.

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