分享一例笔记本记录的故障案例：
radio 原来是UP的，WLC 重启后接口就变成admin down

查询结果如下：

https://quickview.cloudapps.cisco.com/quickview/bug/CSCuu32303 有个bug

Symptom:AP radio interfaces are in "administratively down" state after controller reload.Conditions:1. Register AP with 3650 v.3.7.1SE.2. Interface status before reload:AP Name MAC Address Slot Admin State Oper State Channel Width TxPwr -------------------------------------------------------------------------------------------------------------APd072.dcba.5da0 544a.00bf.ed00 0 Enabled Up 11* 20 1(*) AP Name MAC Address Slot Admin State Oper State Channel Width TxPwr ------------------------------------------------------------------------------------------------------------------APd072.dcba.5da0 544a.00bf.ed00 1 Enabled Up (36,40)* 40 1(*) 3. Reload WLC4. Interface status after reload:AP Name MAC Address Slot Admin State Oper State Channel Width TxPwr -------------------------------------------------------------------------------------------------------------APd072.dcba.5da0 544a.00bf.ed00 0 Enabled Down 11* 20 1(*) AP Name MAC Address Slot Admin State Oper State Channel Width TxPwr ------------------------------------------------------------------------------------------------------------------APd072.dcba.5da0 544a.00bf.ed00 1 Enabled Down (36,40)* 40 1(*) On AP:APd072.dcba.5da0#sh ip int bInterface IP-Address OK? Method Status ProtocolBVI1 192.168.2.175 YES DHCP up up Dot11Radio0 unassigned NO unset administratively down down Dot11Radio1 unassigned NO unset administratively down down
还是截图看吧，上面的文字有点错乱了：

升级IOS 后问题解决！