无法在Unified Manager 虚拟设备上启用和配置eth2

虽然 3.) eth2 在启用网络接口时输入了3、但维护控制台无法识别它

   Network Configuration Menu
  --------------------------
   1 ) Display IP Address Settings
   2 ) Change IP Address Settings
   3 ) Display Domain Name Search Settings
   4 ) Change Domain Name Search Settings
   5 ) Display Static Routes
   6 ) Change Static Routes
   7 ) Disable Network Interface
   8 ) Enable Network Interface
   9 ) Commit Changes
   10 ) Ping a Host
   11 ) Restore to Default Settings

   b ) Back
   x ) Exit

  Enter your choice: 8

  Select interface:
  -------------------------
   1.) eth0
   2.) eth1
   3.) eth2

  Enter your choice (1-3): 3
  Enter your choice (1-3):