Coexistence with IPv4

Описание: Welcome to the ITFreeTraining video on co-existence of the IPv4 and the IPv6 protocols. Inevitably, Internet Protocol version 6 will replace version 4 but that day seems to still be a rather long way away. Adoption is still slow for IPv6. Until then, network administrators will remain in a situation where they will likely encounter a need to utilize both protocols. Our video will cover the changes to IPv6 over IPv4 and the impact of using IPv6 and IPv4 on the same network.

Access the rest of the course: http://ITFreeTraining.com/ipv6
Download the PDF handout: http://ITFreeTraining.com/handouts/ip...

History of IPv6
0:25 – To begin, we’ll review the major developments and milestones of the IPv6 protocol to provide you with an understanding of how it is today. Back in 1994, work was initiated for a successor to IPv4 due to the forecasted crowding of the public addresses. The 1990s saw an exponential growth in the size of the Internet and it was quickly determined that the address space for the entirety of the IPv4 protocol was overwhelmingly small and would not be able to accommodate the future growth of the Internet. In 1996 alpha code was added to the Linux kernel. It would still be considered experimental, but operating system support was on the way.
1:00 – In 1998, the Internet Engineering Task Force (IETF) formally announced that IPv6 would be the successor to the IPv4 protocol. Obviously, a lot of work had been done before this announcement on this protocol including work on IPv5. The announcement meant that IPv4 was being replaced with the IPv6 protocol, one day. In 2002, Microsoft began supporting IPv6 within their Windows XP operating system. The protocol was effectively tossed into the operating system and though it provided functionality and support for IPv6, performance was lacking.
1:34 – In 2005, Linux began experimental support of IPv6 which marked the beginning of official Linux support. At this point, it considered IPv6 in Linux to be stable. Following up in 2007, Microsoft released the operating system, Vista for its Windows lineup and with it, complete IPv6 functionality. This addition of IPv6 in Windows Vista was completely redesigned and was not simply an add-on to the operating system as it was previously. It was also made IPv6 the default protocol to use within the operating system, so when IPv6 is available, Windows will utilize that protocol over IPv4.
2:05 – Finally, as recently as 2008, six of the root name servers (backbones of the internet) had IPv6 quad A records added to their systems. This means that IPv6 resolution on the Internet was now made possible. You can see that after 2008, operating systems and core internet DNS services were capable and ready to support IPv6. So why has deployment of IPv6 been so slow?

Status of IPv6 Deployment
2:28 – If I now have a closer look at the current status of IPv6, it can be seen that OS support is fairly complete. They support IPv6 and all of its functionality as a whole. Even mobile devices such as Android and iOS support IPv6. Due to this long time of availability, application support has improved greatly. It is up to the application developer, however, to ensure their program is compatible with IPv6. There’s no statistics for how many applications support IPv6, however a quick check of the feature list of many applications show that IPv6 support is very prevalent.

IPv6 Statistics
3:10 Open internet explorer and go to the page https://www.akamai.com/us/en/about/ou... You can also find this page by doing a search for state of the internet. This page shows the current adoption of IPv6 per country. At the time this video was made, United States of America was 20% but is now about %40. The top country was still however below 50%.

04:12 In Internet Explorer, open the page http://www.worldipv6launch.org/measur... Since the recording of this video the measurements have changed. Comcast is now about 60% and Verizon Wireless is about 82%. One of the reasons that IPv6 deployment has been slow was that initially IPv6 equipment was expensive. ISP’s were reluctant to upgrade equipment on networks where there is little demand. As technology improve, become cheaper and IPv6 becomes more standard on equipment, ISP’s are slowly upgrading their equipment. If you can get IPv6 will determine on which ISP you connect to and where you are located. In some locations, IPv6 may not yet be available.

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Credits
Trainer: Austin Mason http://ITFreeTraining.com
Voice Talent: HP Lewis http://hplewis.com
Companion Document: Phillip Guld https://philguld.com
Video Production: Kevin Luttman http://www.KevinLuttman.com
Quality Assurance: Brett Batson http://www.pbb-proofreading.uk