According to ipconfig /all, this virtual network adapter has the MAC address 0A-00-27-00-00-10. When I installed Oracle VirtualBox, it created a network adapter on my host system called "VirtualBox Host-Only Network". It seems the behavior changed for VirtualBox 5.x.Īlso note that a Microsoft Loopback Adapter might work to let you specify your own MAC, but note that the MAC will only take effect if it is in the range of "locally administered addresses". When I rolled back to VirtualBox 4.3.38 and added the MAC registry setting, VirtualBox used the value I specified. Upon re-install, I did not see a new MAC entry. When I uninstalled VirtualBox 5.x, the registry section for the Host Only adapter went away. I noticed when upgrading to VirtualBox 5.x, it kept assigning a random MAC address and did not honor the MAC registry setting that I had put in place under VirtualBox 4.x. VirtualBox Host-Only Ethernet Adapterġ3 equals 0x0D, and that’s the MAC address. Realtek PCIe GBE Family Controllerġ3.0a 00 27 00 00 0d. You can easily inspect the index in the route print command: =ġ0.c0 7c d1 c0 37 71.
This index is managed by Windows and provided to the driver at initialization in the NDIS_MINIPORT_INIT_PARAMETERS structure. It simply uses the interface index to create a MAC address. The reason can be easily understood when looking at the driver’s source code: pAdapter->8 = 0x08 | 2 // DB: computes to 10 = 0x0A The plain and simple truth is: This is not possible in current versions of VirtualBox.
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