连接无线网络提示 Userauth state

无线网络是通过windows的NPS+数字证书进行认证连接的，安卓设备均可正常连接，今天尝试拿Ipad进行测试，ac后台一直报这个错误，Received disassociation packet in Userauth state，想问一下是什么原因导致的。

AC关键配置如下：

 dot1x 

 dot1x authentication-method eap

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interface Vlan-interface15

 ip address 10.0.15.80 255.255.255.0

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wlan service-template test

 description for mobile station

 ssid test

 vlan 15      

 quick-association enable

 user-isolation enable

 akm mode dot1x

 cipher-suite ccmp

 security-ie rsn

 security-ie wpa

 client-security authentication-mode dot1x

 dot1x re-authenticate enable

 dot1x domain nps

 service-template enable

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radius scheme nps-cent

 primary authentication 10.0.0.1 

 primary accounting 10.0.0.1

 secondary authentication 10.0.0.2

 secondary accounting 10.0.0.2

 accounting-on enable

 key authentication cipher $c$3$9UaQ4sWwDK2XEEb0MX1FpRfwYHU0=

 key accounting cipher $c$3$k3+uGhD/rYyV3Vn/uXwusjrEkmnAs=

 timer realtime-accounting 10

 nas-ip 10.0.15.80

 data-flow-format data kilo-byte 

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domain nps

 authentication lan-access radius-scheme nps-cent

 authorization lan-access radius-scheme nps-cent

 accounting lan-access radius-scheme nps-cent

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