Mobility Express部署外部映象伺服器
1、當我們部署完ME的時候，發現有一些AP雖然顯示已經加入了WLC（ME），但是它其實並沒有正常的工作，顯示不可用：
(Cisco Controller) >show ap su
Number of APs.................................... 2
Global AP User Name.............................. Not Configured
Global AP Dot1x User Name........................ Not Configured
* prefix indicates Cisco Internal AP
AP Name Slots AP Model Ethernet MAC Location Country IP Address Clients DSE Location
------------------------------ ----- -------------------- ----------------- -------------------- ---------- --------------- ------- --------------
*BJSL-1240680-AP1 2 AIR-AP1852I-H-K9 18:8b:45:0a:03:00 default location CN 192.168.111.11 0 [0 ,0 ,0 ]
AP1 2 AIR-CAP1702I-H-K9 88:1d:fc:3a:b2:14 default location 192.168.111.10 0 [0 ,0 ,0 ]
(Cisco Controller) >show ap join stats summary all
Number of APs.............................................. 2
Base Mac AP EthernetMac AP Name IP Address Status
18:8b:45:0a:74:c0 18:8b:45:0a:03:00 BJSL-1240680-AP1 192.168.111.11 Joined
a0:ec:f9:50:a7:30 a0:ec:f9:50:a7:30 AP1 192.168.111.10 Joined
這個時候，我們需要部署一個外部的server以供線上的裝置去升級對應的版本，以加入ME正常工作：
如上配置資訊Save之後，對應的裝置將會自動從TFTP server下載需要的映象。
對應的AP更換完成後，會重新加入WLC：
(Cisco Controller) >show ap summary
Number of APs.................................... 2
Global AP User Name.............................. Not Configured
Global AP Dot1x User Name........................ Not Configured
* prefix indicates Cisco Internal AP
AP Name Slots AP Model Ethernet MAC Location Country IP Address Clients DSE Location
------------------------------ ----- -------------------- ----------------- -------------------- ---------- --------------- ------- --------------
*BJSL-1240680-AP1 2 AIR-AP1852I-H-K9 18:8b:45:0a:03:00 default location CN 192.168.111.11 0 [0 ,0 ,0 ]
AP1 2 AIR-CAP1702I-H-K9 88:1d:fc:3a:b2:14 default location CN 192.168.111.10 0 [0 ,0 ,0 ]
此時就可以正常使用了。