To enhance your Hyper-V clustering setup, ensure you disable NetBIOS on dedicated adapters, give your network adapters meaningful names, and segregate iSCSI and cluster networks on their own VLANs or switches. Additionally, specify a network for Live Migration and utilize a Microsoft-supported network setup for optimal performance.
To improve performance, it's a good idea to disable NetBIOS over TCP/IP on your cluster NIC and iSCSI NIC. NetBIOS isn't used in Server 2008 R2 clusters.
When you configure Hyper-V Clustering, each node will have upwards of 4 network adapters, some virtual and some physical. It is important to give these adapters meaningful names so you know what network adapter does what.
Having the network flooded with a virus is bad news – but it will be worse news if iSCSI traffic is going across the same network. This is why you should have your iSCSI or SAN traffic on a different VLAN.
Being able to communicate with the domain is so important for Hyper-V and clustering. To protect yourself from Active Directory problems, you can completely separate your primary Active Directory domain.
It is important have the Live Migration and Cluster traffic on a separate network interface than the iSCSI or SAN traffic. If you do not you will see a performance hit while migrating virtual machines and the process will be a lot slower.
When setting up Failover Cluster Manager it is important that each Physical Machine, also known as a host or node be setup in an identical manner. This means each machine should be configured the same, with the same networks and same workloads running.
It is best practice to have your nodes only running the necessary features to run Failover Cluster Manager, leaving your VMs or other hosts not in the cluster to run everything else.
For this reason SSW recommends only running Failover Cluster Manager and Hyper-V roles on your nodes. It is also recommended that each node in the cluster is identical hardware, this is not strictly required but will assist in the ease of management.
Microsoft lists several recommended and supported network configurations. It is very important that you configure your Hyper-V Cluster with one of the supported network types otherwise you will have performance issues once you load up the cluster.
Don't log in and make manual changes to the clustered nodes.
When working with clustered environments it is important that settings be consistent across every node. The best way to handle this is through group policy.
As Hyper-V Clustering requires some advanced networking technologies make sure you download the very latest drivers for all your network cards – don’t just rely on the out of box driver.