In Part I we talked about the basics of what
virtual networking network virtualization and SDN is.
In this post I’ll explain what can be achieved with Hyper-V’s
virtual networking network virtualization capabilities.
Before I dive into how and why I want to explain exactly what can be achieved using Hyper-V
virtual networking network virtualization and why you want to achieve this. With standard Networking you can start with a standard network assigned to an individual Nic Port or you can take it to the next level using a shared Nic Port for all Networks by assigning Vlans.
However Vlans require switch configuration!
To avoid this you can take full advantage of hyper-v’s
virtual networking network virtualization and go to the next level of assigning multiple networks using a single or multiple Nics but letting Hyper-V it self segment the networks. Basically all Hyper-V hosts will be aware of all networks and separate them one from the other. You could even have multiple networks using the same subnet and the sam Nic card and still keep the VM’s on the different networks totally isolated from each other. You can find the Official Microsoft Poster for Virtual networking network virtualization here.
Now why would you want to do this? Simple, Hosting. If you’re hosting for customers you can allow any customer to bring his subnet with him to be hosted without conflicting with another customers subnet. Or you could set up an identical network to your existing network for testing purposes, and the list goes on.
Now the final layer can only be configured via Powershell or System Center Virtual machine Manager 2012 Sp1. You Start with your Logical Switch (Think of this as a physical switch) which is configured with direct (trunk) access to a physical Nic in the host. Once the Logical Switch is configured you can start configuring logical networks and VM networks and assign them to you logical switches and hyper-v hosts. Once all hosts have been assigned the logical and VM networks they will fully separate VM’s configured in separate logical networks from each other even if te VM’s are using the same subnet and same logical switch. You can read a great Blog on Technet regarding configuration of virtual networking here.
I hope this helps you understand the abilities and advantages of Hyper-V
virtual Networking network virtualization .
In part III I’m going to explain how you can connect Virtual networks to external networks and/or the internet.