By Kurt Seifried (kurt@seifried.org)

This is a short entry, I’m going to be spending all weekend helping with a course (so I won’t have much time to write an article) and I’m basically feeling lazy right now.

In a nutshell: IPv6 is finally starting to be deployed in North America and on corporate networks. This means that IPv4 and IPv6 will have to co-exist, not only on the networks, but on the end host systems. So basically you can either tunnel IPv4 over IPv6, or tunnel IPv6 over IPv4. Chances are you have an IPv4 network deployed so you’ll be choosing IPv6 tunneled over IPv4 (this seems almost … obvious in hindsight).

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