Working with controlled APs
Discovery of controllers by controlled APs
6-11
Discovery priority
Each controller or controller team that receives a discovery request sends the requesting AP
a discovery reply. If the AP authentication option is enabled, the AP needs to be
authenticated first. Requests from unauthenticated APs are ignored.
If an AP receives discovery replies from multiple controllers, the AP selects the controller
that has the highest discovery priority setting. If that controller is already managing the
maximum number of controlled APs, the AP will choose the controller with the next highest
priority.
Non-teamed controllers are always higher priority than controller teams. Therefore, if your
network contains both controller teams and non-teamed controllers, APs first attempt to
establish a secure management tunnel with discovered non-teamed controllers in order of
their discovery priority. Only if all non-teamed controllers are already managing the
maximum number of controlled APs will the AP then consider controller teams in the order
of their priority.
The following table shows how discovery would occur for several teamed and non-teamed
controllers.
If two controllers have the same priority setting, the AP will appear on the Overview >
Discovered APs page of both controllers with a Diagnostic value of Priority Conflict (See
Viewing all discovered APs on page 6-14). To resolve the conflict, change the priority setting
of one of the controllers on its Discovery page.
Discovery priority is set on a controller using the Discovery priority of this controller
option on the Controller >> Management > Device Discovery page.
Controller or Team
Configured discovery
priority setting
Actual order of
discovery by APs
Controller 1 1 1
Controller 2 2 2
Controller 3 3 3
Team 1 1 4
Team 2 2 5
Team 3 3 6
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