Transitioning to IPv6

IPv6, fun facts, and no more excuses.

Today I attended another Tech&Meet, hosted by Nico Declerck, focused on the transition to IPv6. Nico kept things interesting by mixing technical explanations with fun facts about Bruges and its beers.

Introduction: Why IPv6?
Nico made a strong case for the long-term benefits. First, there’s the obvious one: IPv4 is running out of space. Beyond that, IPv6 offers real security advantages. It restores end-to-end communication without relying on messy workarounds.

That brings me to NAT. For years, many of us have treated NAT as a basic security feature. Nico explained why that’s a misunderstanding. NAT was never designed for security. It was a temporary patch to stretch the life of IPv4. In reality, it adds routing overhead, makes troubleshooting harder, and gives a false sense of protection. IPv6 removes NAT from the equation entirely. That means cleaner network design, better transparency, and less hidden complexity.

The transition is already happening within ISPs and large organizations, and SMEs are next. Waiting only makes the eventual switch more painful. Nico made it clear: there’s no real excuse left to delay.

Transitioning to IPv6-only
This section focused on what happens when IPv4 eventually disappears from modern networks. Nico explained why organizations should already be thinking about that future and preparing for it. He highlighted some of the challenges that come from applying old IPv4 habits to IPv6 environments and showed that an IPv6-only network can actually be simpler to manage.

Dual Stack in Practice
Nico also discussed dual-stack deployments, in which IPv4 and IPv6 run side by side. While this is often the most practical way to transition, he pointed out that it also increases the amount of work involved. Firewall rules, routing, monitoring, and troubleshooting must be maintained for both protocols. His message was clear: dual stack is useful during migration, but it shouldn’t become a permanent solution.

Final thoughts

Before this session, I honestly didn’t realize how urgent the whole IPv6 thing actually is. I knew it existed, but I never thought it was something I needed to worry about anytime soon. Turns out I was wrong.

I learned a lot. And what made it stick was that Nico didn’t just throw technical terms at us. He kept it fun with the facts, which actually helped because you remember more when you’re not bored. Thank you for this nice Tech&Meet, Nico Declerck!