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    <title>topic vmxnet3 Windows 2008 R2 slow file copy in ESXi Discussions</title>
    <link>https://communities.vmware.com/t5/ESXi-Discussions/vmxnet3-Windows-2008-R2-slow-file-copy/m-p/2205935#M213466</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Hi,&lt;/P&gt;&lt;P&gt;I have a decent IBM server which is used for testing/development work.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;I have installed a fresh Windows 2008R2 VM, with e1000.&lt;/P&gt;&lt;P&gt;Using a 6GB iso file, file copy speed between physical PC to this VM (with e1000) is around 80+MB/s.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Then I powered off this VM, remove e1000, add vmxnet3. Power it on.&lt;/P&gt;&lt;P&gt;Using the same 6GB iso file, file copy speed between physical PC to this VM (with vmxnet3) is around 30+MB/s.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;So between these two tests only the NIC type has been changed. Everything else stays the same, same RAID disk, same vswitch, same physical 1Gbps switch.&lt;/P&gt;&lt;P&gt;Host CPU load and physical switch load is negligible, I'm the only person using these resources.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Some posts suggest these changes to the Windows 2008R2 VM settings,&lt;/P&gt;&lt;P&gt;Netsh int tcp set global RSS=Disable&lt;/P&gt;&lt;P&gt;Netsh int tcp set global chimney=Disabled&lt;/P&gt;&lt;P&gt;Netsh int tcp set global autotuninglevel=Disabled&lt;/P&gt;&lt;P&gt;Netsh int tcp set global congestionprovider=None&lt;/P&gt;&lt;P&gt;Netsh int tcp set global ecncapability=Disabled&lt;/P&gt;&lt;P&gt;Netsh int ip set global taskoffload=disabled&lt;/P&gt;&lt;P&gt;Netsh int tcp set global timestamps=Disabled&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;None of these made any difference, vmxnet3 is still stuck around 30+MB/s.&lt;/P&gt;&lt;P&gt;I'm hoping someone has seen this issue because I'm hopelessly stuck.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Regards.&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Tue, 22 Apr 2014 01:50:12 GMT</pubDate>
    <dc:creator>joelau007</dc:creator>
    <dc:date>2014-04-22T01:50:12Z</dc:date>
    <item>
      <title>vmxnet3 Windows 2008 R2 slow file copy</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/vmxnet3-Windows-2008-R2-slow-file-copy/m-p/2205935#M213466</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Hi,&lt;/P&gt;&lt;P&gt;I have a decent IBM server which is used for testing/development work.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;I have installed a fresh Windows 2008R2 VM, with e1000.&lt;/P&gt;&lt;P&gt;Using a 6GB iso file, file copy speed between physical PC to this VM (with e1000) is around 80+MB/s.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Then I powered off this VM, remove e1000, add vmxnet3. Power it on.&lt;/P&gt;&lt;P&gt;Using the same 6GB iso file, file copy speed between physical PC to this VM (with vmxnet3) is around 30+MB/s.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;So between these two tests only the NIC type has been changed. Everything else stays the same, same RAID disk, same vswitch, same physical 1Gbps switch.&lt;/P&gt;&lt;P&gt;Host CPU load and physical switch load is negligible, I'm the only person using these resources.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Some posts suggest these changes to the Windows 2008R2 VM settings,&lt;/P&gt;&lt;P&gt;Netsh int tcp set global RSS=Disable&lt;/P&gt;&lt;P&gt;Netsh int tcp set global chimney=Disabled&lt;/P&gt;&lt;P&gt;Netsh int tcp set global autotuninglevel=Disabled&lt;/P&gt;&lt;P&gt;Netsh int tcp set global congestionprovider=None&lt;/P&gt;&lt;P&gt;Netsh int tcp set global ecncapability=Disabled&lt;/P&gt;&lt;P&gt;Netsh int ip set global taskoffload=disabled&lt;/P&gt;&lt;P&gt;Netsh int tcp set global timestamps=Disabled&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;None of these made any difference, vmxnet3 is still stuck around 30+MB/s.&lt;/P&gt;&lt;P&gt;I'm hoping someone has seen this issue because I'm hopelessly stuck.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Regards.&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Tue, 22 Apr 2014 01:50:12 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/vmxnet3-Windows-2008-R2-slow-file-copy/m-p/2205935#M213466</guid>
      <dc:creator>joelau007</dc:creator>
      <dc:date>2014-04-22T01:50:12Z</dc:date>
    </item>
    <item>
      <title>Re: vmxnet3 Windows 2008 R2 slow file copy</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/vmxnet3-Windows-2008-R2-slow-file-copy/m-p/2205936#M213467</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Did you re-install vmware-tools in between, after you added vmxnet3?&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Tue, 22 Apr 2014 05:08:24 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/vmxnet3-Windows-2008-R2-slow-file-copy/m-p/2205936#M213467</guid>
      <dc:creator>JarryG</dc:creator>
      <dc:date>2014-04-22T05:08:24Z</dc:date>
    </item>
    <item>
      <title>Re: vmxnet3 Windows 2008 R2 slow file copy</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/vmxnet3-Windows-2008-R2-slow-file-copy/m-p/2205937#M213468</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Well, I did not re-install Vmware tools. However I did check Device Manager to make sure the detected NIC has changed from Pro/1000 MT to a vmxnet3.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;I'll test re-install Vmware tools later in the evening.&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Tue, 22 Apr 2014 05:47:41 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/vmxnet3-Windows-2008-R2-slow-file-copy/m-p/2205937#M213468</guid>
      <dc:creator>joelau007</dc:creator>
      <dc:date>2014-04-22T05:47:41Z</dc:date>
    </item>
    <item>
      <title>Re: vmxnet3 Windows 2008 R2 slow file copy</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/vmxnet3-Windows-2008-R2-slow-file-copy/m-p/2205938#M213469</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;A bit of mixed and confusing results.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;First, on the fresh Windows 2008R2 VM with vmxnet3, re-install Vmware tools indeed increase the copy speed from 30+MB/s to 50+MB/s. Still a bit short of the 80MB/s+ delivered by the good old e1000.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;With this result in mind, I went on to re-install Vmware tools on another Windows 2008R2 VM with the same speed issue. However it didn't do the trick this time, still stuck at 30+MB/s.&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 23 Apr 2014 00:30:45 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/vmxnet3-Windows-2008-R2-slow-file-copy/m-p/2205938#M213469</guid>
      <dc:creator>joelau007</dc:creator>
      <dc:date>2014-04-23T00:30:45Z</dc:date>
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