suggest try to disable or Turn off Flexible Radio Assignment (FRA) .
不過disable FRA好像並不會回復已經變成5GHz的radio, 可能還需要手動以 config advanced fra revert 指令讓 AP reset radio 回預設值
可以參考下列文章:
https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-3/b_RRM_White_Paper/fra.html
suggest try to disable or Turn off Flexible Radio Assignment (FRA) .
不過disable FRA好像並不會回復已經變成5GHz的radio, 可能還需要手動以 config advanced fra revert 指令讓 AP reset radio 回預設值
可以參考下列文章:
https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-3/b_RRM_White_Paper/fra.html