Single NIC for Hyper-V

Imagine the problem: You have a physical server and you decided to use Hyper-V for virtualisation. The problem is, that you have only one NIC(network interface controller) for both host system and hyper-v.
So what we have:

• Parent Partition: Windows Server 2008 R2 with Hyper-V
• Child Partition: Windows Server 2008 R2
• One physical NIC
• DHCP server

Step 1: Create a Virtual Network in Virtual Network Manager (in Hyper-V manager)

Step 2: Go to your network adapter settings on parent partition (host computer), choose properties. The network manager installed Microsoft Virtual Switch Protocol, and disabled all other protocols. Now, the child partitions can use the network, but your parent partition can’t.

Step 3: You have to enable all the protocols.