Information About Dual-Band Radio Support
The Dual-Band (XOR) radio in APs like Cisco 2800, 3800, 4800, and the 9100 series AP models offers the ability to serve 2.4–GHz or 5–GHz bands or passively monitor both the bands on the same AP. These APs can be configured to serve clients in 2.4–GHz and 5–GHz bands, or serially scan both 2.4–GHz and 5–GHz bands on the flexible radio while the main 5–GHz radio serves clients.
Cisco APs are designed to support dual 5–GHz band operations with the i model supporting a dedicated Macro/Micro architecture and the e and p models supporting Macro/Macro. When a radio moves between bands (from 2.4GHz to 5GHz and vice versa), clients need to be steered to get an optimal distribution across radios. When an AP has two radios in the 5–GHz band, the radios operate as a macro cell and micro cell. Macro-micro client steering is used to steer a client between macro and micro.
The XOR radio support can be steered manually or automatically:
Manual steering of a band on a radio—The band on the XOR radio can only be changed manually.
Automatic steering of the band on the radio—The band on the XOR radio is changed by the Flexible Radio Assignment (FRA) feature that monitors and changes the band as per site requirements.