Книга: Windows Server 2012 R2 Storage, Security, & Networking Pocket Consultant

Configuring networking for Hyper-V

Configuring networking for Hyper-V

After you install Hyper-V and create an external virtual network, your server uses a virtual network adapter to connect to the physical network. When you work with the Network Connections page, you will find the original network adapter and a new virtual network adapter. The original network adapter will have nothing bound to it except the Microsoft Virtual Network Switch Protocol, and the virtual network adapter will have all the standard protocols and services bound to it. The virtual network adapter that appears under Network Connections will have the same name as the virtual network switch with which it is associated.

NOTE As part of the Hyper-V configuration, you can create an internal virtual network, which enables communications only between the server and hosted virtual machines. This configuration exposes a virtual network adapter to the parent server without the need to have a physical network adapter associated with it and isolates the virtual machine from the Internet and the rest of the LAN. hyper-V binds the virtual network service to a physical network adapter only when an external virtual network is created. An external virtual network is required for communications on the LAN and the Internet.

Following this, when you install Hyper-V on a server and enable external virtual networking, you’ll find that virtual network switching is being used. As shown in Figure 7–5, the server has a network connection with the Hyper-V Extensible Virtual Switch protocol enabled and all other networking components not enabled in the dialog box on the left and an entry for a virtual connection with the key networking components enabled and the Hyper-V Extensible Virtual Switch Protocol disabled in the dialog box on the right. This is the configuration you want to use to ensure proper communications for the server and any hosted virtual machines that use networking. If this configuration is changed, virtual machines won’t be able to connect to the external network.

FIGURE 7–5 Use switched virtual networking to ensure communications with hosted virtual machines.

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