- Georges P Vanier 20142015mr. Mac's Virtual Existence Date
- Georges P Vanier 20142015mr. Mac's Virtual Existence -
Maintaining and Changing the MAC Address of a Virtual Machine
When a virtual machine is powered on, VMware Workstation automatically assigns each of its virtual network adapters an Ethernet MAC address. MAC stands for media access control. A MAC address is the unique address assigned to each Ethernet network device.
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- Virtual PC, like SoftPC allowed users to run a copy of windows on the Mac computer, in order to work around software incompatibilities. In 1998, a company called VMWare was established, and in 1999 began selling a product similar to Virtual PC called VMWare Workstation.
The software guarantees that virtual machines are assigned unique MAC addresses within a given host system. In most cases, the virtual machine is assigned the same MAC address every time it is powered on, so long as the virtual machine is not moved (the path and filename for the virtual machine's configuration file must remain the same) and no changes are made to certain settings in the configuration file.
In addition, VMware Workstation does its best, but cannot guarantee, to automatically assign unique MAC addresses for virtual machines running on multiple host systems.
Avoiding MAC Changes
To avoid changes in the MAC address automatically assigned to a virtual machine, you must not move the virtual machine's configuration file. Moving it to a different host computer or even moving it to a different location on the same host computer changes the MAC address.
You also need to be sure not to change certain settings in the virtual machine's configuration files. If you never edit the configuration file by hand and do not remove the virtual Ethernet adapter, these settings remain untouched. If you do edit the configuration file by hand, be sure not to remove or change the following options:
ethernet[n].generatedAddress
ethernet[n].addressType
ethernet[n].generatedAddressOffset
uuid.location
uuid.bios
ethernet[n].present
In these options, [n] is the number of the virtual Ethernet adapter, for example ethernet0.
Note: To preserve a virtual Ethernet adapter's MAC address, you also must be careful not to remove the adapter. If you remove the adapter, then recreate it, the adapter may receive a different MAC address.
Manually Assigning a MAC Address
Mcculloch mac 130 manual. If you want to guarantee that the same MAC address is assigned to a given virtual machine every time, even if the virtual machine is moved, or if you want to guarantee a unique MAC address for each virtual machine within a networked environment, you can assign the address manually instead of allowing VMware Workstation to assign it automatically.
To assign the same, unique MAC address to any virtual machine manually, use a text editor to remove three lines from the configuration file and add one line. The configuration file has a.vmx extension at the end of the filename. On a Linux host, a virtual machine created with an earlier VMware product may have a configuration file with a .cfg extension.
Remove the three lines that begin with the following from the configuration file:
Georges P Vanier 20142015mr. Mac's Virtual Existence Date
ethernet[n].generatedAddress
ethernet[n].addressType
ethernet[n].generatedAddressOffset
Burn dmg to disk. In these options, [n] is the number of the virtual Ethernet adapter — for example ethernet0.
Add the following line to the configuration file:
ethernet[n].address = 00:50:56:XX:YY:ZZ
In this line, XX must be a valid hexadecimal number between 00h and 3Fh, and YY and ZZ must be valid hexadecimal numbers between 00h and FFh. Because VMware Workstation virtual machines do not support arbitrary MAC addresses, you must use the above format.
Georges P Vanier 20142015mr. Mac's Virtual Existence -
So long as you choose a value for XX:YY:ZZ that is unique among your hard-coded addresses (where XX is a valid hexadecimal number between 00h and 3Fh, and YY and ZZ are valid hexadecimal numbers between 00h and FFh), conflicts between the automatically assigned MAC addresses and the manually assigned addresses should never occur.