MAC duplication issues with captured VMs and WDS

I’ve previously reported problems with MAC duplication on Hyper-V host external network connections on Windows Server 2008 R2, which I’ve never fully resolved, although we have been successfully working around the issue as detailed in the first link above. A couple of weeks ago I was working simultaneously on my Windows Server 2008 R2 laptop […]

Building a SharePoint 2007/2010 development environment – Part VI: Issues and Results

In the first five parts of this series I covered the project objectives and the system design, then turned my attention to the Hyper-V host image build, automated deployment and the guest virtual machine build. In this post I review some of the questions and issues we’ve encountered after a few months of working this […]

More on routine loss of external network connectivity on Hyper-V hosts (not guests)

Further to my post from a few months ago on the this topic (dating back to the RC build), I’ve seen this same problem a few more times on the RTM build of Windows Server 2008 R2. My suggested approach still fixes the problem and it doesn’t recur, but I’ve still not been able to […]

Disabling IPv6 on Server Core and Hyper-V Server

Note: this original KB article from which this guidance was taken has now been removed. Please see the comments below for more information. I recently posted about the Conflicting Microsoft guidance on IPv6. While you can remove IPv6 from a NIC on a full installation of Windows Server 2008 by un-ticking the IPv6 box in […]

Conflicting guidance on IPv6

I recently noticed that Cable Guy is saying “don’t disable IPv6”. While I broadly agree with the approach and the reasons he suggests not to, I’ve not yet seen any down-side to disabling it, and I know we aren’t using the IPv6 technologies that Cable Guy mentions. But why did I turn it off? SharePoint’s Hyper-V performance […]

Windows Deployment Services trumps Internet Connection Sharing

I imagine the responses to this post’s title will fall in to one of three categories: What’s Windows Deployment Services? What’s Internet Connection Sharing? Why on earth would you use both in one machine? To answer the last question I need to unveil a bit about the network approach that we’ve adopted for the Hyper-V on Windows […]

Routine loss of connectivity on a Hyper-V host’s external connection

We’ve recently been piloting a laptop developer build on Windows Server 2008 R2 Release Candidate (Build 7100) with the Hyper-V role. One of the first receipients of this build complained of connectivity problems in Office Communicator once every minute or two. For as-yet undiagnosed reasons we have lengthy sign-in times for Communicator, so this loss of connectivity rendered it completely unusable. This same […]

Hyper-V Manager over VPN may fail if the server is VMM-managed

About a year ago John Howard published guidance on how to get Hyper-V Manager to connect to Hyper-V servers over VPN. His network monitoring and suggestion to change the VPN connection IP settings so that the VPN adapter registers the machine’s new address in DHCP/DNS went a long way towards fixing the issue  for me – […]