An Introduction to Networking with Hyper-V
When we start considering Hyper-V as a virtualization solution, we need to begin considering the concept of partitions. Each system with Hyper-V active will have onboard a "primary partition", which you can consider to be the "core" or "base" system upon which Hyper-V actually drives the virtual machines.
Each virtual machine itself is another partition, specifically a "child partition" related to the primary one. One thing impacted by this concept of partitions is now networking is handled by the host. Upon the installation/activation of Hyper-V, network cards assigned to each child partition will show up within the primary partition as additional network cards. When this occurs, the bindings on the original physical network card are changed to remove the usual bindings and add the Virtual Network Switch Protocol.
Thus, the original network card becomes effectively like a software router, sending traffic to virtual cards as necessary within the internal network.
More past the jump...
There will be some important considerations associated with this change. As copied from this blog post at www.thesystemadministrator.com:
The virtual network adapter that appears under Network Connections will have the same name as the virtual network switch it is associated with.It is possible to create an 'Internal' virtual network - which will expose a virtual network adapter to the parent partition without needing to have a physical network adapter associated with it.
Unlike with Virtual Server, Hyper-V only binds the virtual network service to a physical network adapter when a virtual switch is associated with the physical network adapter in question. The advantage of this is that you avoid the performance overhead involved with having this service enabled on network adapters that are not associated with virtual network switches, the downside is that it means that networking gets disrupted on the network adapter in question when a virtual network switch gets created or deleted.
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