Reference Guide

every 6 seconds to monitor the RF environment for each channel. This is configurable. Over time, each
radio is able to gain a full picture of the RF environment and learn:
• Neighboring APs
• Sources of Wi-Fi Interference
• Sources of Non-Wi-Fi Interference
Figure 2: O-Channel Scanning
The RF environmental information is collected by each AP and forwarded to the elected RF Domain
Manager or the Extreme Campus Controller who co-ordinates the channel and power decisions. Smart
RF uses the RF environmental information to make intelligent power and channel changes as the RF
environment evolves over time, and to initiate Neighbor Recovery, Interference Recovery, and Coverage
Hole Recovery features.
Channel and Power Selection
The channels and power values assigned to the Smart RF-managed radios are dependent on the
country code assigned to the site, the channel and power configuration defined in the Smart RF Policy,
and whether the Smart RF Policy is enabled:
• If the Smart RF Policy assigned to the device group is enabled, the channel and power assigned to
each Smart RF-managed radio is based on the channel and power values defined within the Smart
RF Policy. The channel and power values are selected based on the neighbor AP placement and
interfering devices.
• If the Smart RF Policy assigned to the device group is disabled, the assigned channels are randomly
selected from the channel list defined within the Smart RF Policy. The assigned channels persist until
the AP is rebooted or until the radios are disabled and re-enabled. The power of each radio is set to
the highest permissible value.
About Smart RF in Extreme Campus Controller
Channel and Power Selection
Extreme Campus Controller Smart RF Reference Guide for version 5.46.02 9