300-430 · Question #290
Refer to the exhibit. An administrator sees interferers that cause connectivity issues in the 2.4GHz band. The DCA cycle on the Cisco Catalyst 9800 Series wireless controller runs every six hours…
The correct answer is B. Event-Driven RRM. Event-Driven RRM enables APs to trigger an immediate channel change when interference exceeds a threshold, bypassing the standard DCA schedule for dynamic RF environments.
Question
Refer to the exhibit. An administrator sees interferers that cause connectivity issues in the 2.4GHz band. The DCA cycle on the Cisco Catalyst 9800 Series wireless controller runs every six hours for this band. The RF environment is dynamic on that floor, so the APs must change channels when a certain level of interference is detected. Which feature should be enabled to manage the interference?
Exhibit
Options
- AAir Quality Alarms
- BEvent-Driven RRM
- CInterference Device Alarms
- DUnclassified interference
How the community answered
(61 responses)- A11% (7)
- B75% (46)
- C8% (5)
- D5% (3)
Why each option
Event-Driven RRM enables APs to trigger an immediate channel change when interference exceeds a threshold, bypassing the standard DCA schedule for dynamic RF environments.
Air Quality Alarms notify administrators of poor RF conditions but do not trigger any automatic channel reassignment on the controller or APs.
Event-Driven RRM (ED-RRM) supplements the periodic DCA cycle by allowing an AP to immediately signal the controller to reassign its channel when Air Quality drops below a configured threshold, rather than waiting for the next scheduled DCA run. This is essential in a dynamic RF environment where a six-hour DCA interval would leave clients exposed to interference-related connectivity failures for an unacceptably long period.
Interference Device Alarms generate alerts when CleanAir identifies specific interferer types but do not cause the controller to proactively reassign channels in response.
Unclassified interference is a CleanAir classification category for unknown interference sources, not a configurable feature that responds to or manages interference automatically.
Concept tested: Event-Driven RRM for proactive interference channel reassignment
Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/config-guide/b_wl_16_10_cg/radio-resource-management.html
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