I like to find useful tools to help in the vSphere 4 world and one such tool is the vSphere Client RDP Plug-in from the guys over at xtravirt:  

http://xtravirt.com/vsphere-client-rdp-plug-in 

The plugin adds a context menu item to your right-click when you select a particular VM. Being able to fire off the RDP session directly is a huge time saver in larger environments over time. I'm happy to report that it works as advertised.

Looking forward to the PartnerExchange at the Mandalay Bay Hotel in Las Vegas Feb 8 - 11, 2010!

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While setting up 2008 Clustering on vSphere I came across an annoying error saying that I had a duplicate IP on what seemed to be an unknown Ethernet interface.

After some poking around I managed to find a few articles that pointed me in the right direction. The problem is related to Teredo, which is an IPv6 Tunneling Protocol. It allows IPv6 communications to pass through IPv4 NATs and IPv4 servers. It ends up giving an identical IP address to its network interfaces, and that's what causes the problem.