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This is a Linux binary executable and therefore must be run on a Linux operation system. Anyway, I found the solution via the VMware community.Ī Linux tool called vmmacgen (the VMware MAC Generator) exists, with which you can generate a unique MAC address. I still don’t know why, but VMware generated every time the same MAC address. I was in situation already once regarding cloning a VMware machine. That this isn’t always the case, is often proven on big LAN events or by spoofing a MAC address manually on your Wireless LAN card. HELP – MAC address not unique (on your network)!Ī MAC address should be unique on a network (theoretically) and reflects in its values, amongst others, the manufacturer of the network card and a unique number for the card itself. If everything went OK it will be possible to ping the outside world from within your virtual machine. TX packets:3686442 errors:0 dropped:0 overruns:0 carrier:0 RX packets:5962141 errors:0 dropped:0 overruns:0 frame:0
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UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 vamisux00:/# mv ifcfg-eth-id-00:50:56:a0:17:d7 ifcfg-eth-id-00:0c:29:c1:9e:66Ī method to check if everything went well is to use the ifconfig statement.Įth0 Link encap:Ethernet HWaddr 00:0c:29:c1:9e:66 Vamisux00:/# /etc/sysconfig/network # ls -l if*ĥ) Rename this file to match the MAC address mentioned in your VMware configuration file. “00:0c:29:c1:9e:66â€).Ħ) Activate your Ethernet card by executing the “ifup eth0†statement on the Linux command prompt (use ifdown eth0 to de-activate the Ethernet card).Ĥ) In the directory /etc/sysconfig/network resides a file with a part of the MAC address in its name.
#Vmware mac address range genetator update
This file contains your Linuxĥ) Update the MAC address in the ifcfg-eth0 file with the same MAC address as shown in your VMware vmx-configuration file (eg. If your system uses more Ethernet network cards, then replace the number 0 (of eth0) by the number that references your Ethernet card RedHatġ) Take a note off the newly generated address, for example the shown value “00:0c:29:c1:9e:66â€ģ) Login on your Linux environment with the root account, via the VMware console, and open a terminal window.Ĥ) In the directory /etc/sysconfig/network-scripts there will be a file for your (virtual) Ethernet card called ifcfg-eth0. The examples are based on the first Ethernet card in your system, referenced by eth0.
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The following actions, SUSE and RedHat environments are used as an example, can be taken to straighten up these network problems. Updating the configuration file will also update the unique MAC address mentioned in this file.Ĭloned and/or moved VMware machines will therefore have a different MAC addresses in the vmx configuration file and in the Linux VMware guest environment and network traffic is not possible anymore between host and guest environments.
#Vmware mac address range genetator software
It contains all necessary info needed for my VMware Server software to start-up and/or deal with this environment. The contents of my local (VMware Server version 1.1) vmx configuration file (C:\Virtual Machines\RHE元U8_32\Red Hat Enterprise Linux 3.vmx) looks like: The updated configuration file with the extention vmx, contains a lot of information about the virtual machine that you have created, for instance information about your NIC (network) card, and is located in the same directory where your VMware machine files where created (for example C:\Virtual Machines\RHE元U8_32). The following will help you to get on your way resolving these network problems, caused by MAC addresses, which are now out of sync.Ī maybe more readable version (and how it looked like when I posted it) can now also be found here: The VMware Configuration File When updating the configuration file, as requested by the software, your once working network settings won’t work anymore.
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When you use VMware Server software to move or clone VMware Linux guest machines, you are asked by the VMware software if it should update the configuration file.