Windows虛擬機的網路卡突然消失

前幾天有同事反應Windows虛擬機的網路卡突然不見了，連進去看果然消失了。



可是查看虛擬機設定網路卡還是存在。



想新增網卡也不行，有錯誤訊息產生。




後來把這台虛擬機做Vmotion之後，才看到網路卡不見的狀況，之後新增網卡成功，虛擬機網路才正常。




查看LOG，發現跟KB https://kb.vmware.com/s/article/1020718 此篇很像，

Cause

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ESX/ESXi 4.x and later version included a feature called HotPlug. In some deployments virtual NICs can appear as removable devices on the System Tray in Windows guest operating systems. Problems can occur if you mistake this device for one that you can safely remove. This is particularly true in VMware View environments, where interaction with the Desktop is constant.

Note: Do not remove virtual NICs from the Windows System Tray.

網卡為HotPlug裝置所以可以移除成功，並且順便把設定檔的網卡拿掉。

目前的解法在KB下面有寫，就是移除HotPlug功能，但之後就不能在線上增加裝置，所以要請使用者小心不要點到這個。