IPv6 – address plans

Space is big. You just won’t believe how vastly, hugely, mind- bogglingly big it is. I mean, you may think it’s a long way down the road to the chemist’s, but that’s just peanuts to space.

— The Hitchhiker’s Guide to the Galaxy, Douglas Adams

The IPv6 address space offers some challenges to the network architect. It’s vastly different in scope and scale from our address-constrained IPv4 world.  Network Address Translation (NAT), subnets-of-subnets, and other familiar workarounds just aren’t needed or helpful.

The biggest challenge in creating an IPv6 address plan may be overcoming decades of IPv4 planning experience.  So much of “best practice” in IPv4 is exactly “worst practice” in IPv6.

Over the next several posts, I’ll be looking at how to create IPv6 address plans, registrar recommendations, IETF Best Current Practices, and practical considerations. I’ve found a few interesting address plans from some research organizations, too. While most of this won’t be needed by the home user, it may help understand what you’re seeing from your home IPv6 network.

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