Difference between revisions of "Win7 Guest DHCP not working fix"

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If you have problem with Win7 or Win2012 KVM guest with dhcp not working, you can try to disable checksum offloading  
 
If you have problem with Win7 or Win2012 KVM guest with dhcp not working, you can try to disable checksum offloading  
<pre>Disabling the Checksum Offloading the following way on Your Windows PC solved the Problem.
 
  
1. Click Start - Search and type “regedit”.
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* Click Start - Search and type “regedit”.
  
2. Go to the following registry key
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* Go to the following registry key:
  
 
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
 
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
  
HKEY_LOCAL_MACHINE
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* Add a DWORD(32bit) Value named "DisableTaskOffload" and set it to "1".
\SYSTEM
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* Restart the Windows PC to make the changes happen.
\CurrentControlSet
 
\Services
 
\Tcpip
 
\Parameters
 
  
3. Add a DWORD(32bit) Value named "DisableTaskOffload" and set it to "1".
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=== Custom NIC Checksum Settings ===
4. Restart the Windows PC to make the changes happen.
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If you need to set NIC checksum only for IPv4/Pv6, TCP/UDP, RX/TX you can use the NIC Advanced setting here:
</pre>
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[[File:NIC_Checksum.jpg]]
 
[[Category:Troubleshooting]]
 
[[Category:Troubleshooting]]
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[[Category: Qemu/KVM]]

Latest revision as of 15:18, 6 October 2016

If you have problem with Win7 or Win2012 KVM guest with dhcp not working, you can try to disable checksum offloading

  • Click Start - Search and type “regedit”.
  • Go to the following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

  • Add a DWORD(32bit) Value named "DisableTaskOffload" and set it to "1".
  • Restart the Windows PC to make the changes happen.

Custom NIC Checksum Settings

If you need to set NIC checksum only for IPv4/Pv6, TCP/UDP, RX/TX you can use the NIC Advanced setting here:

NIC Checksum.jpg