Odd Behaviour from Hyper-V Virtual Networks

January 29, 2011
Yoni Kirsh

in Blog, Connectivity, Host, Hyper-V 2008 R2, Server 2008 R2, SMB, System Center Configuration

I recently found myself scratching my head trying to resolve an issue with one of our Hyper-V 2008 R2 host. The network in question had a number of virtual guests attached to it as well as some physical machines, through an attached PCI network card. We were actually trying to build a bunch of PC’s using a virtual SCCM server.

When our task sequence kept failing, It appeared that SMB connectivity to physical machines wasn’t working. Sometimes you could browse to a network location, it would hang for about 20 seconds and then either display the contents of the folder, or simply time out. Interestingly, virtual machines on the same host as the server worked without issue.

After much gnashing of teeth and updating of drivers, I came up with the following solution.

Under Network Connections, right-click the network card that your virtual network is attached to, click Properties.

Click Configure

2nd

Under the Advanced tab, select Large Send Offload v2, then select Disabled on the right hand side.

1st

click OK twice.

The reason I say this behaviour is odd, is that we’ve been using Hyper-V 2008 R2 now for ages and never come across this problem until now.

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Non et sem malesuada imperdiet Augue consequat convallis. Fusce id consectetur felis, eget tincidunt elit. Nulla placerat mauris eget arcu feugiat, ac pretium risus ullamcorper. Suspendisse auctor, tartar dignissim feugiat mattis, dui dolor euismod lectus, et pulvinar est quam in augue. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos.

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Non et sem malesuada imperdiet Augue consequat convallis. Fusce id consectetur felis, eget tincidunt elit. Nulla placerat mauris eget arcu feugiat, ac pretium risus ullamcorper. Suspendisse auctor, tartar dignissim feugiat mattis, dui dolor euismod lectus, et pulvinar est quam in augue. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos.

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Sed ullamcorper dignissim magna, vitae pretium augue vehicula ut. Curabitur in vestibulum risus. Pellentesque venenatis, mi vitae dictum volutpat, mi erat efficitur elit, quis eleifend augue arcu tristique urna. Vestibulum sit amet lectus nec dolor molestie iaculis. Vestibulum tempor, sapien dignissim hendrerit lobortis, turpis orci hendrerit mi, quis imperdiet eros nulla ut tortor. Nam laoreet. Duis sed ex arcu. Etiam placerat lectus lacus, scelerisque venenatis lectus malesuada nec. Sed sed tortor quis turpis mattis ultrices.

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Etiam eget odio

  • Sed ullamcorper dignissim magna, vitae pretium augue vehicula ut. Curabitur in vestibulum risus. Pellentesque venenatis, mi vitae dictum volutpat, mi erat efficitur elit, quis eleifend augue arcu tristique urna. Vestibulum sit amet lectus nec dolor molestie iaculis. Vestibulum tempor, sapien dignissim hendrerit lobortis, turpis orci hendrerit mi, quis imperdiet eros nulla ut tortor. Nam laoreet. Duis sed ex arcu. Etiam placerat lectus lacus, scelerisque venenatis lectus malesuada nec. Sed sed tortor quis turpis mattis ultrices.

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Sed ullamcorper dignissim magna, vitae pretium augue vehicula ut. Curabitur in vestibulum risus. Pellentesque venenatis, mi vitae dictum volutpat, mi erat efficitur elit, quis eleifend augue arcu tristique urna. Etiam placerat lectus lacus, scelerisque venenatis lectus malesuada nec. Sed sed tortor quis turpis mattis ultrices.

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Augue consequat convallis. Fusce id consectetur felis, eget tincidunt elit. Nulla placerat mauris eget arcu feugiat, ac pretium risus ullamcorper. Suspendisse auctor, tortor dignissim feugiat mattis, dui dolor euismod lectus, et pulvinar est quam in augue. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Nam pharetra volutpat euismod. Proin eu nisl quis urna rutrum tincidunt.

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Non et sem malesuada imperdiet Augue consequat convallis. Fusce id consectetur felis, eget tincidunt elit. Nulla placerat mauris eget arcu feugiat, ac pretium risus ullamcorper. Suspendisse auctor, tartar dignissim feugiat mattis, dui dolor euismod lectus, et pulvinar est quam in augue. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos.

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Non et sem malesuada imperdiet Augue consequat convallis. Fusce id consectetur felis, eget tincidunt elit. Nulla placerat mauris eget arcu feugiat, ac pretium risus ullamcorper. Suspendisse auctor, tartar dignissim feugiat mattis, dui dolor euismod lectus, et pulvinar est quam in augue. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos.

blog-img2.jpg

Etiam eget odio

Sed ullamcorper dignissim magna, vitae pretium augue vehicula ut. Curabitur in vestibulum risus. Pellentesque venenatis, mi vitae dictum volutpat, mi erat efficitur elit, quis eleifend augue arcu tristique urna. Vestibulum sit amet lectus nec dolor molestie iaculis. Vestibulum tempor, sapien dignissim hendrerit lobortis, turpis orci hendrerit mi, quis imperdiet eros nulla ut tortor. Nam laoreet. Duis sed ex arcu. Etiam placerat lectus lacus, scelerisque venenatis lectus malesuada nec. Sed sed tortor quis turpis mattis ultrices.

blog-img2.jpg

Etiam eget odio

  • Sed ullamcorper dignissim magna, vitae pretium augue vehicula ut. Curabitur in vestibulum risus. Pellentesque venenatis, mi vitae dictum volutpat, mi erat efficitur elit, quis eleifend augue arcu tristique urna. Vestibulum sit amet lectus nec dolor molestie iaculis. Vestibulum tempor, sapien dignissim hendrerit lobortis, turpis orci hendrerit mi, quis imperdiet eros nulla ut tortor. Nam laoreet. Duis sed ex arcu. Etiam placerat lectus lacus, scelerisque venenatis lectus malesuada nec. Sed sed tortor quis turpis mattis ultrices.

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Morbi tincidunt massa non et sem

Duis nec ultricies lacus, vitae ornare mauris. Aliquam tempor lorem id neque suscipit ultricies. Pellentesque tristique est diam, at dictum ipsum egestas vitae. Phasellus quis semper nulla. Donec sit amet aliquet ipsum, vitae accumsan nisi. Integer vehicula arcu eu dictum varius. Donec in arcu quis nibh auctor pellentesque in in nibh. Ut consectetur mi quis dolor porttitor mollis. Integer fringilla nibh vel purus euismod suscipit.

blog-img1.jpg

Non et sem malesuada imperdiet Augue consequat convallis. Fusce id consectetur felis, eget tincidunt elit. Nulla placerat mauris eget arcu feugiat, ac pretium risus ullamcorper. Suspendisse auctor, tartar dignissim feugiat mattis, dui dolor euismod lectus, et pulvinar est quam in augue. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos.

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Non et sem malesuada imperdiet Augue consequat convallis. Fusce id consectetur felis, eget tincidunt elit. Nulla placerat mauris eget arcu feugiat, ac pretium risus ullamcorper. Suspendisse auctor, tartar dignissim feugiat mattis, dui dolor euismod lectus, et pulvinar est quam in augue. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos.

blog-img2.jpg

Etiam eget odio

Sed ullamcorper dignissim magna, vitae pretium augue vehicula ut. Curabitur in vestibulum risus. Pellentesque venenatis, mi vitae dictum volutpat, mi erat efficitur elit, quis eleifend augue arcu tristique urna. Vestibulum sit amet lectus nec dolor molestie iaculis. Vestibulum tempor, sapien dignissim hendrerit lobortis, turpis orci hendrerit mi, quis imperdiet eros nulla ut tortor. Nam laoreet. Duis sed ex arcu. Etiam placerat lectus lacus, scelerisque venenatis lectus malesuada nec. Sed sed tortor quis turpis mattis ultrices.

blog-img2.jpg

Etiam eget odio

  • Sed ullamcorper dignissim magna, vitae pretium augue vehicula ut. Curabitur in vestibulum risus. Pellentesque venenatis, mi vitae dictum volutpat, mi erat efficitur elit, quis eleifend augue arcu tristique urna. Vestibulum sit amet lectus nec dolor molestie iaculis. Vestibulum tempor, sapien dignissim hendrerit lobortis, turpis orci hendrerit mi, quis imperdiet eros nulla ut tortor. Nam laoreet. Duis sed ex arcu. Etiam placerat lectus lacus, scelerisque venenatis lectus malesuada nec. Sed sed tortor quis turpis mattis ultrices.

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Tell The Reader More

The headline and subheader tells us what you're offering, and the form header closes the deal. Over here you can explain why your offer is so great it's worth filling out a form for.

Remember:

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  • For spelling out benefits and
  • Turning visitors into leads.

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blog-img2.jpg

Something Powerful

Tell The Reader More

The headline and subheader tells us what you're offering, and the form header closes the deal. Over here you can explain why your offer is so great it's worth filling out a form for.

Remember:

  • Bullets are great
  • For spelling out benefits and
  • Turning visitors into leads.

Daft tincidunt massa non

Augue consequat convallis. Fusce id consectetur felis, eget tincidunt elit. Nulla placerat mauris eget arcu feugiat, ac pretium risus ullamcorper. Suspendisse auctor, tortor dignissim feugiat mattis, dui dolor euismod lectus, et pulvinar est quam in augue. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Nam pharetra volutpat euismod. Proin eu nisl quis urna rutrum tincidunt.

Morbi tincidunt massa non et sem

Duis nec ultricies lacus, vitae ornare mauris. Aliquam tempor lorem id neque suscipit ultricies. Pellentesque tristique est diam, at dictum ipsum egestas vitae. Phasellus quis semper nulla. Donec sit amet aliquet ipsum, vitae accumsan nisi. Integer vehicula arcu eu dictum varius. Donec in arcu quis nibh auctor pellentesque in in nibh. Ut consectetur mi quis dolor porttitor mollis. Integer fringilla nibh vel purus euismod suscipit.

blog-img1.jpg

Non et sem malesuada imperdiet Augue consequat convallis. Fusce id consectetur felis, eget tincidunt elit. Nulla placerat mauris eget arcu feugiat, ac pretium risus ullamcorper. Suspendisse auctor, tartar dignissim feugiat mattis, dui dolor euismod lectus, et pulvinar est quam in augue. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos.

blog-img1.jpg

Non et sem malesuada imperdiet Augue consequat convallis. Fusce id consectetur felis, eget tincidunt elit. Nulla placerat mauris eget arcu feugiat, ac pretium risus ullamcorper. Suspendisse auctor, tartar dignissim feugiat mattis, dui dolor euismod lectus, et pulvinar est quam in augue. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos.

blog-img2.jpg

Etiam eget odio

Sed ullamcorper dignissim magna, vitae pretium augue vehicula ut. Curabitur in vestibulum risus. Pellentesque venenatis, mi vitae dictum volutpat, mi erat efficitur elit, quis eleifend augue arcu tristique urna. Vestibulum sit amet lectus nec dolor molestie iaculis. Vestibulum tempor, sapien dignissim hendrerit lobortis, turpis orci hendrerit mi, quis imperdiet eros nulla ut tortor. Nam laoreet. Duis sed ex arcu. Etiam placerat lectus lacus, scelerisque venenatis lectus malesuada nec. Sed sed tortor quis turpis mattis ultrices.

blog-img2.jpg

Etiam eget odio

  • Sed ullamcorper dignissim magna, vitae pretium augue vehicula ut. Curabitur in vestibulum risus. Pellentesque venenatis, mi vitae dictum volutpat, mi erat efficitur elit, quis eleifend augue arcu tristique urna. Vestibulum sit amet lectus nec dolor molestie iaculis. Vestibulum tempor, sapien dignissim hendrerit lobortis, turpis orci hendrerit mi, quis imperdiet eros nulla ut tortor. Nam laoreet. Duis sed ex arcu. Etiam placerat lectus lacus, scelerisque venenatis lectus malesuada nec. Sed sed tortor quis turpis mattis ultrices.

Something Powerful

Tell The Reader More

The headline and subheader tells us what you're offering, and the form header closes the deal. Over here you can explain why your offer is so great it's worth filling out a form for.

Remember:

  • Bullets are great
  • For spelling out benefits and
  • Turning visitors into leads.

Halope caft cidunt denkum

blog-img2.jpg

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