Which statement about a Cisco Mesh Network when a radar event is detected by the MAP on a mesh tree when coordinated channel change is enabled is true?
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A. B. C. D.A.
If the mesh access point does detect radar, the controller and the mesh access point both will retain the channel as the configured channel.
The controller retains it in volatile memory associated with the mesh access point, and the mesh access point has it stored in its flash as configuration.
After the 30 minute quiet period, the controller returns the mesh access point to the static value, regardless of whether the mesh access point has been configured with a new channel or not.
In order to overcome this, configure the mesh access point with a new channel, and reboot the mesh access point.
http://www.cisco.com/c/en/us/td/docs/wireless/technology/mesh/7-0/design/guide/MeshAP_70.html#wp1167244In a Cisco Mesh Network, when a radar event is detected by the Mesh Access Point (MAP) on a mesh tree, the coordinated channel change feature allows the MAP to coordinate with its parent Root Access Point (RAP) to change to a non-DFS channel to avoid interference from radar systems.
Option A is incorrect because the MAP does not immediately stop transmission on the current channel and join the parent after 30 minutes. This is because 30 minutes is a long time to wait for the MAP to start transmitting again, and it can affect the performance of the network.
Option B is the correct answer. When a radar event is detected by the MAP, it propagates the radar event information to the RAP in the same Basic Service Set (BSS) and searches for a different parent working on a non-DFS channel. Once it finds a different parent, it joins there, which ensures that the MAP does not transmit on the current channel and avoids interference from radar systems.
Option C is incorrect because the MAP does not continue transmitting beacons and probes for 10 seconds after the radar detection and suspends operation for the next 30 minutes. This is because the MAP needs to switch to a non-DFS channel as soon as possible to avoid interference.
Option D is incorrect because the whole sector does not move to the new channel. Only the MAP and its parent RAP coordinate to switch to a non-DFS channel to avoid interference from radar systems.
Therefore, the correct statement is Option B.