很多人碰到思科AP刷到最新的固件后，接入点显示为0，小编整理了一下解决办法，供大家参考。
建议检查：show country, 看看配置是否为CN，因为国内的设备需要配置成CN,如果不是那就通过配置修改Country Code为CN。
(CISCO Controller) >config country CN
Changing country code could reset channel & RRM grouping configuration.
If running in RRM One-Time mode, reassign channels after this command.
Check customized APs for valid channel values after this command.
Are you sure you want to continue? (y/n) y
(Cisco Controller) >show country
Configured Country............................. CN - China
Configured Country Codes
CN - China..................................... 802.11a Indoor,Outdoor / 802.11b / 802.11g
(Cisco Controller) >