Windows Azure Virtual Network enables you to create secure site-to-site connectivity, as well as protected private virtual networks in the cloud. You can specify the address space that will be used for both your virtual network and the virtual network gateway. Additionally, new name resolution features allow you to connect directly to role instances and virtual machines by hostname. These features allow you to use Windows Azure as you would a branch office, or as a protected private virtual network in the cloud. This tutorial walks you through the steps to create a Windows Azure virtual network that connects to your company’s network using the Management Portal. After completing this tutorial, you will have a virtual network where you can deploy your Windows Azure services and communicate with your company’s network.
The Network Administrator will bring the network configuration into the Windows Azure Portal (API)
When the Network Administrator is done with the Network config wizard of Windows Azure
he has to config the firewall on-premises with the Windows Azure configuration.
The Network administrator has done his work and now we have a
secure site to site VPN tunnel with our own Virtual Switch in Windows Azure.
The IT Administrator can now deploy his Deployment package with
System Center 2012 SP1 APP Controller
And now we have our virtual Servers running in Windows Azure with our own IP4 addresses
communicating with our servers on-Premises.
Here you see a video of creating virtual networks in Microsoft Windows Azure :