However, there is possibility of changing the initial MAC address of a VM by editing VMX file unlike physical card MAC address which is Burned-in Address (BIA) on the Card.This MAC address is similar to the MAC address of Physical ethernet card which is hardcoded into the card.Initial MAC address is assigned to a virtual machine (static or dynamic assignment) by vCenter Server or ESXi host and written into VMX file of virtual machine.In fact it is applicable in physical networking too. There are three types of MAC addresses from operational point of view in virtual networking as listed below. Understanding MAC address types and possibilities of changing MAC address is quite important before we talk about Forged transmit or MAC address change policies.Īnyway, isn’t that sound bit odd? I mean types of MAC addresses, are there any types as such?Īs mentioned earlier, indeed we have. By the way, I am not referring to Static or Dynamic allocation of MAC addresses. So first of all, we will understand concepts related to MAC Address Types in virtual networking.

Now that makes it interesting and important as well to know more about it. It is possible in virtualized environment.Can there be duplication of MAC address?.However, What about virtual adapters in virtualization? And that is true when it comes hardware network adapters. So why not talk about them first.Īs we all know MAC addresses are supposed to be globally unique. So it is going to make much more sense to discuss both of them together.Īs the policy name indicates, ‘MAC address change’ so it sounds something related to MAC addresses. Well, these two policies are related to each other. In this post, we are going to discuss MAC address Change and Forged Transmit policy settings.

In previous part we explored Promiscuous mode policy.

Vmware change network mac address