Hyper-V dynamic MAC address allocation and network issues

In a physical only world, you don’t usually have to worry about MAC addresses that much as each NIC vendor carves off a MAC address from their ranges which have been allocated to them. However, in a virtual environment, you have to be a little more careful, particularly if you are using dynamic MAC address […]

In a physical only world, you don’t usually have to worry about MAC addresses that much as each NIC vendor carves off a MAC address from their ranges which have been allocated to them. However, in a virtual environment, you have to be a little more careful, particularly if you are using dynamic MAC address assignment. This post looks at how Hyper-V allocates dynamic MAC addresses and some potential problems you can face. So often it can be the last thing people think to check, but can be the root cause of otherwise unexplained network oddities.

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