How to Find a MAC Address in VMware and Hyper-V. There might be a time when your network team asks you to check on a MAC address coming from your virtualization infrastructure this could be for a number of reasons. Or you have the MAC address of a virtual machine and have no idea which virtual machine the MAC address belongs to. If your environment is small it shouldn’t be too hard to do. According to the VMware OUI allocation scheme, the hypervisor generates MAC addresses that consists of the VMware OUI 00:0C:29 and the last three octets of the virtual machine UUID in hexadecimal format. The virtual machine UUID is based on a hash calculated by using the UUID of the ESXi physical machine and the path to the configuration file.

In most network deployments, generated MAC addresses are a good approach. However, you might need to set a static MAC address for a virtual machine adapter with unique value.

The following cases show when you might set a static MAC address:

• Virtual machine adapters on different physical hosts share the same subnet and are assigned the same MAC address, causing a conflict.
• Ensure that a virtual machine adapter always has the same MAC address.

Mac Address Vmware Network Card

Mac Address Conflict Vmware

By default, VMware uses the Organizationally Unique Identifier (OUI) 00:50:56 for manually generated addresses, but all unique manually generated addresses are supported.

Mac Address Vmware Appliance