IPv6 has been around for something on the order of 15 years, yet it has yet to see widespread adoption. It was recently enabled on Internet core DNS infrastructure, and had been adopted in some network like those operated by certain mobile carriers. The current IP addressing and allocation scheme, dubbed IPv4, will eventually run out of IP addresses. There’s been a sort of boy-called-wolf debate over whether we’re really going to allocate the entire IPv4 address space anytime soon or not. But eventually we’ll run out — some say in 2010.

Sean Siler, Program Manager responsible for IPv6, joined Richard Campbell and me for a RunAs Radio show. Sean really knows his stuff and did a terrific job of describing IPv6, comparing it to IPv4, and other useful information.

IPv6 enables a lot more than just additional addresses, though. Sean discusses what’s the same, what’s different and what’s new (hint: IPSEC and multicasting everywhere). He also offers a great analogy to describe the enormous size of the IPv6 address space. It’s mind-boggling, really.

If you don’t understand or know much about IPv6, this interview is a great place to start learning, and you truly need to be doing so if you do network design or other work in your job. The change is significant, but not impossible — so go listen to the show and get learning!

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