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I can help clarify the following doubts:
The LAP 1524 WLC supports high availability? Ie to implement a mesh network with 2 WLC and 20 LAP1524 at the time the primary WLC fails 20 LAP1524 be recorded against the secondary WLC?
What is the configuration recommended in this case?
HA is not supported on AP1000 series. All other Access Points support HA.