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    <title>topic Re: Virtual Machine Manual MAC Address Question in ESXi Discussions</title>
    <link>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211014#M214492</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;AFAIK, MAC-address is always static. And concerning&amp;nbsp; values, the only thing you really have to take care of is there are not two (or more) network-adapters with the same mac-address on the same network-segment...&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Wed, 30 Apr 2014 06:37:35 GMT</pubDate>
    <dc:creator>JarryG</dc:creator>
    <dc:date>2014-04-30T06:37:35Z</dc:date>
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      <title>Virtual Machine Manual MAC Address Question</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211013#M214491</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Just need some guidance here as I have to install an app on a VM and it requires a static MAC address.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;I know how to do this on the VM and see it pre populate the first 3 octets but need some guidance on the last 3. &lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Is there a method or place in vCenter to generate or obtain a MAC to use or do I use an online MAC generator.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Doco on VMware is a bit vague on this.&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 30 Apr 2014 06:27:52 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211013#M214491</guid>
      <dc:creator>thebigO</dc:creator>
      <dc:date>2014-04-30T06:27:52Z</dc:date>
    </item>
    <item>
      <title>Re: Virtual Machine Manual MAC Address Question</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211014#M214492</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;AFAIK, MAC-address is always static. And concerning&amp;nbsp; values, the only thing you really have to take care of is there are not two (or more) network-adapters with the same mac-address on the same network-segment...&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 30 Apr 2014 06:37:35 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211014#M214492</guid>
      <dc:creator>JarryG</dc:creator>
      <dc:date>2014-04-30T06:37:35Z</dc:date>
    </item>
    <item>
      <title>Re: Virtual Machine Manual MAC Address Question</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211015#M214493</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Hi,&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;when you keep the default settings, the MAC is set to automatic and is generated.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;No need to change this. The MACs generated are quite static. They stay the same, even after power off/on / vMotion / SvMotion etc.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Regards&lt;/P&gt;&lt;P&gt;Tim&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 30 Apr 2014 06:49:21 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211015#M214493</guid>
      <dc:creator>schepp</dc:creator>
      <dc:date>2014-04-30T06:49:21Z</dc:date>
    </item>
    <item>
      <title>Re: Virtual Machine Manual MAC Address Question</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211016#M214494</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;As an update I ended up calling a one of the Engineers from VMware to get an idea what they would say.&amp;nbsp; Engineer said he has never had to do this and as you said once it is generated and applied to a machine automatically there is no real reason it will change.&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 30 Apr 2014 06:52:41 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211016#M214494</guid>
      <dc:creator>thebigO</dc:creator>
      <dc:date>2014-04-30T06:52:41Z</dc:date>
    </item>
    <item>
      <title>Re: Virtual Machine Manual MAC Address Question</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211017#M214495</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Hello,&lt;/P&gt;&lt;P&gt;take a look to &lt;A href="http://pubs.vmware.com/vsphere-55/topic/com.vmware.vsphere.networking.doc/GUID-1C9C9FA5-2D2D-48DA-9AD5-110171E8FD36.html"&gt;this&lt;/A&gt;, to gain knowledge about Mac address in vSphere.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Best regards,&lt;/P&gt;&lt;P&gt;Pablo&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 30 Apr 2014 10:26:35 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211017#M214495</guid>
      <dc:creator>Borja_Mari</dc:creator>
      <dc:date>2014-04-30T10:26:35Z</dc:date>
    </item>
    <item>
      <title>Re: Virtual Machine Manual MAC Address Question</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211018#M214496</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Did it a few times, this article helped me do it&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;A href="http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&amp;amp;cmd=displayKC&amp;amp;externalId=507" title="http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&amp;amp;cmd=displayKC&amp;amp;externalId=507"&gt;VMware KB: Changing the MAC address of a hosted virtual machine &lt;/A&gt;&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 30 Apr 2014 12:08:13 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211018#M214496</guid>
      <dc:creator>Wh33ly</dc:creator>
      <dc:date>2014-04-30T12:08:13Z</dc:date>
    </item>
    <item>
      <title>Re: Virtual Machine Manual MAC Address Question</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211019#M214497</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Hello,&lt;/P&gt;&lt;P&gt;take a look to &lt;A _jive_internal="true" href="https://communities.vmware.com/blogs/VirtuallyAnITNoob/2014/05/02/when-vmware-changes-the-mac-address-of-the-virtual-machines"&gt;this&lt;/A&gt; to gain knowledge about when vmware changes the virtual machines' mac address.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Best regards,&lt;/P&gt;&lt;P&gt;Pablo&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Fri, 02 May 2014 22:32:10 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211019#M214497</guid>
      <dc:creator>Borja_Mari</dc:creator>
      <dc:date>2014-05-02T22:32:10Z</dc:date>
    </item>
    <item>
      <title>Re: Virtual Machine Manual MAC Address Question</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211020#M214498</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;If you are looking to setup &amp;amp; draw from an automated pool to draw the MAC address for VM's, this is not user configurable/available.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;This is internally maintained and provisioned when network adapters are added to VM's. This is not guaranteed from changing. in a multi- vCenter environment there could be duplicate MAC in the environment. These are based on arbitrary algorithm that vcenter uses based on an instance ID.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;If your application is sensitive to MAC address remaining the same in the lifecycle of the VM, (sometime is the case with legacy app licensing tied to hardware)&lt;/P&gt;&lt;P&gt;Set it manually to static.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;To do this, follow the document&lt;/P&gt;&lt;P&gt;&lt;A href="http://pubs.vmware.com/vsphere-55/index.jsp?topic=%2Fcom.vmware.vsphere.troubleshooting.doc%2FGUID-8D7D0126-8E8A-470F-A61E-4197EE32D08F.html" title="http://pubs.vmware.com/vsphere-55/index.jsp?topic=%2Fcom.vmware.vsphere.troubleshooting.doc%2FGUID-8D7D0126-8E8A-470F-A61E-4197EE32D08F.html"&gt;vSphere 5.5 Documentation Center &lt;/A&gt;&lt;/P&gt;&lt;P&gt;KB article&lt;/P&gt;&lt;P&gt;&lt;A href="http://kb.vmware.com/kb/219" title="http://kb.vmware.com/kb/219"&gt;VMware KB: Setting a static MAC address for a virtual NIC &lt;/A&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Abstract&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;&lt;SPAN&gt; =====&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Add these two lines to the virtual machine's configuration file:&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P style="margin-left: 40px;"&gt;&lt;SPAN style="font-family: Courier New;"&gt;ethernet0.addressType = "static"&lt;BR /&gt;ethernet0.address = 00:50:56:&lt;EM&gt;XX&lt;/EM&gt;:&lt;EM&gt;YY&lt;/EM&gt;:&lt;EM&gt;ZZ&lt;/EM&gt;&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;&lt;SPAN&gt;&lt;BR /&gt;Where &lt;SPAN style="font-family: Courier New;"&gt;&lt;EM&gt;XX&lt;/EM&gt;&lt;/SPAN&gt; is a valid hex number between 00 and 3F and &lt;SPAN style="font-family: Courier New;"&gt;&lt;EM&gt;YY&lt;/EM&gt;&lt;/SPAN&gt; and &lt;SPAN style="font-family: Courier New;"&gt;&lt;EM&gt;ZZ&lt;/EM&gt;&lt;/SPAN&gt; are valid hex numbers between 00 and FF. The value for &lt;SPAN style="font-family: Courier New;"&gt;&lt;EM&gt;XX&lt;/EM&gt;&lt;/SPAN&gt; must not be greater than 3F in order to avoid conflict with MAC addresses that are generated by the VMware Workstation and VMware GSX Server products. Thus the maximum value for a manually generated MAC address is:&lt;BR /&gt;&lt;BR /&gt; &lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/P&gt;&lt;P style="margin-left: 40px;"&gt;&lt;SPAN style="font-family: Courier New;"&gt;ethernet0.address = 00:50:56:3F:FF:FF&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;&lt;BR /&gt;VMware ESX Server virtual machines do not support arbitrary MAC addresses, hence the above format must be used. As long as you choose a hex value that is unique among your hard-coded addresses, conflicts between the automatically assigned MAC addresses and the manually assigned ones should never occur.&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;=====&lt;BR /&gt;&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;&lt;BR /&gt;&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;&lt;BR /&gt;&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;Let me know if this addresses your question. Or please share a more detailed requirement/use case.&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;&lt;BR /&gt;&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;&lt;BR /&gt;&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;&lt;BR /&gt;&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;&lt;BR /&gt;&lt;/SPAN&gt;&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Sat, 03 May 2014 07:10:52 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/Virtual-Machine-Manual-MAC-Address-Question/m-p/2211020#M214498</guid>
      <dc:creator>CedricAnto</dc:creator>
      <dc:date>2014-05-03T07:10:52Z</dc:date>
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