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  • Writer's picturePacket Pundit

Part 7: IP Version 6 Addressing

Hello everyone!

Another weekend has passed and, like clockwork, Blake and I immersed ourselves deeper into the recesses of Enterprise Networking. This time, we zeroed in on the intricacies of IP Version 6 (IPv6). As we traverse deeper into the realms of networking, the knowledge becomes more profound, and our discussions more riveting. So, without further ado, let’s dive right into Part VII! Oh, before we get started I almost forgot to introduce a new recruit to the study group! Christian, another colleague of mine has asked if he could join us as he, like Blake, hopes to become a Network Engineer someday. Welcome, Christian! :)

Chapter 22: Fundamentals of IP Version 6

Our intellectual expedition commenced with a thorough examination of the Fundamentals of IP Version 6. For me, this was a journey back in time - to a simpler know...4+ years ago in college when I learned all about IPv6 and IMMEDIATELY deleted it from memory. ;D This "trip down memory lane" started with me explaining to Blake, the reason IPv6 was invented in the first place (hint: IPv4 address exhaustion), along with why smart people in the U.S and elsewhere immediately said "screw this!" and used NAT instead. lol - I swear, I'm not biased at all against IPv6. :P This brief history lesson allowed Blake to understand the historical reasons that necessitated the transition from IPv4 to IPv6. Although IPv6 flat out sucks to use, and there are countless reasons you should NEVER need to use it in production - it still exists and we must understand it if we are to successfully pass our certification exams. After forcing my opinions onto Blake about why IPv6 is evil, we brushed up on the distinct features that separate IPv6 protocols from their predecessor.

Crucial to our study were the myriad IPv6 Addressing Formats and Conventions, including the strategies for abbreviating and expanding IPv6 addresses, which Blake mastered gracefully. Together, we navigated through the nuances of calculating and identifying IPv6 prefixes, even when faced with more complex lengths.

Chapter 23: IPv6 Addressing and Subnetting

Next up was a deep dive into the art and science of IPv6 Addressing and Subnetting. Here, we explored the expanses of Global Unicast Addressing, drawing distinctions between public and private IPv6 addresses and mastering the mechanics of subnetting these addresses.

We also delved into the intriguing world of Unique Local Unicast Addresses, highlighting the necessity for globally unique local addresses. Our animated discussions about where and how to implement IPv6 subnets in an internetwork topology were nothing short of enlightening!

Chapter 24: Implementing IPv6 Addressing on Routers

As we moved on to Chapter 24, the theory met application head-on. We ventured into Implementing IPv6 Addressing on Routers, where we experimented with configuring static and dynamic unicast addresses, not forgetting the essential steps of enabling IPv6 routing and verifying the configurations.

The chapter also brought us face-to-face with special addresses used by routers, including the pivotal Link-Local Addresses. We dissected the significance of IPv6 multicast addresses and the realms of reserved multicast addresses, ultimately familiarizing ourselves with an array of miscellaneous IPv6 addresses such as Anycast addresses, among others.

Chapter 25: Implementing IPv6 Routing

In the final chapter of this section, we learned about Implementing IPv6 Routing. From understanding the rules governing connected and local IPv6 routes to mastering the art of configuring static IPv6 routes, we left no stone unturned.

Central to our discussions was the Neighbor Discovery Protocol (NDP). We carefully dissected each aspect, ranging from discovering neighbor link addresses to understanding the vital role of Stateless Address Autoconfiguration (SLAAC) in IPv6.


Our weekend rendezvous culminated in a fruitful discussion that stretched our understanding of IPv6 to new heights. Blake particularly impressed with his intuitive grasp of subnetting with unique local IPv6 addresses. One of my favorite highlights from this weekend came during the Pearson Test Prep Exam we take each week. We were approximately halfway through the 72 questions on the exam. I was explaining my thought process before giving my answer to the exam question, when Christian interrupted me and says, "Hey, I think the answer is 'C'." I was astonished...Christian only just bought the Cert Guides 30 minutes prior and was merely joining us to see what the study session was like. I thought, "How could he possibly understand IPv6 Addressing if he has never read any of the CCNA study material?! I asked him to explain how he came to that conclusion (because he was exactly correct). He then proceeded to explain, having listened to Blake and I banter back and forth for the last 30 minutes while we answered the previous 35 questions - he was able to piece together how to successfully differentiate between link-local, global unicast, and multicast address prefixes. So, by using the process of elimination and the little info he garnered from our discussions - he was able to come to the right answer. Talk about an awesome experience and true testament to this process! Conclusion

As we closed another chapter in our CCNA journey, the promise of what lies ahead kept our spirits high. The world of IPv6 is vast, complex, yet utterly fascinating, offering glimpses into the future of networking. Although, I hate it. ;) IPv4 Fo' Life! :D

Join us next time as we venture further into the vibrant labyrinth of networking knowledge. Remember, in the world of networking, there's always a new horizon to explore! Until then, keep your prefixes sharp and your networks agile! 🌐💫

Thank you for following our journey! Stay tuned for more updates.

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