Mental Ward

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'Huge' Problem With Hyper-V?

Blogger Scott Lowe is doing some fantastic work at Tech-Ed this week, covering the virtualization-related sessions. Very enlightening, informative stuff.

He's also uncovered what he sees as a big potential problem with Hyper-V: the lack of NIC bonding. NIC bonding, also known as "NIC teaming," "port teaming" and other names, means to link two NICs so they appear as one device, increasing their speed and redundancy.

Lowe learned in the session that Hyper-V doesn't support NIC bonding at all. His take on the impact this could have?

"In my opinion, that is a huge problem. How does one go about providing network link redundancy to guests hosted on Hyper-V? Surely using Failover Clustering and Quick Migration isn't the answer here, is it?"

Lowe contacted one of the presenters and asked for more information on the issue, but as of this writing, he hasn't blogged about getting a response.

What's your take on this? Is it as big a deal as Lowe seems to think? Also, if you work for Microsoft and have any insight into this issue -- if NIC bonding really is unavailable, and if so, why -- please contact me.

Posted by Keith Ward on 06/12/2008 at 10:27 AM


Reader Comments:

Mon, Nov 24, 2008 Jonathan Ebersole Harrisburg, PA

I have read both Scott's blogs and Keith's blogs, and I would have to tend to agree with Scott on this issue. Virtualization has become a huge concern for any company that has more than just a couple servers. By virtualizing, we put all of our hopes and dreams into one (or a few) large, expensive, and robust servers with multiple redundancy built into the hardware. If you have even a handful of important employees or customers working from one virtualized machine and NIC stops responding, you could have significant downtime. This is exactly our situation and why we are so disappointed with Hyper-V not supporting NIC teaming. A single NIC can be bound to multiple VM's, so essentially you can affect many VM's with one NIC failure. Isn't this the opposite of what we are really trying to do?? NIC Teaming in Hyper-V is an absolute MUST in my book. Thanks for listening...

Wed, Jun 18, 2008 Matt Larson Morton, IL

I would think that if there's a NIC bonding issue that it would be a problem, not an unresolvable one, but a problem non-the-less.

That would ultimatly affect the speed and redundancy, and that's pretty important.

Tue, Jun 17, 2008 Brian Illinois

Along with Quick Migration, this shows that Microsoft's Hyper-V is not appropriate for use in environments that require high availability.

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