IPv6: All You Need to Know About the Arrival of This Technology

Last week we explained here as the depletion of IPv4 address table affect the end user of the internet. Although Article answer some of the questions on the table of allocation of the end, it does not answer some of the questions raised by readers in the comments, involving his successor, IPv6. Then I feel the duty to another article explaining how this change will happen and what you need to know. Is ready? Come on.

How is this new IPv6? How many addresses it allows?


Unlike its predecessor, IPv6 is limited to 128 bits of space for addresses. They are represented by 8 groups of 4 hexadecimal digits each, separated by a colon. This means that you will see larger IP addresses and possibly with the letters A, B, C, D, E and F among them. You want an example of IPv6? Look at him there: 2001: 0db8: 85a3: 0000: 0000: 8a2e: 0370: 7334.

It can also be represented as follows: 2001: 0db8: 85a3: 0: 0: 8a2e: 0370: 7334, as the groups which all digits are zeros can be represented by only one. There is still a third embodiment showing it, so even simpler than previous: 2001: db8: 85a3 :: 8a2e: 370: 7334 is also valid because the zero-groups may be replaced by a double colon and the leading zeros of the groups can be omitted without problem.

IPv6 allows more than 340 Unidecilhões address, which is about 75 trillion greater than the amount allowed by IPv4. That is, we will not exhaust them in the very near future.

Time: The site Usinet has the best address in IPv6 have ever seen: 2804: 14: cafe: drink :: c0ca. Oh really. (hint @arcanjo).

When the IP v4 run out, I will lose my connection?

No. You will continue quietly browsing the network using IPv4, because all servers must be configured to accept the two protocols. The only thing that will happen when there are no more IPv4 to distribute is a drop in the growth of the Internet. This, of course, if the providers worldwide have not implemented IPv6 yet, which is quite likely. The firstRIR to exhaust their IPv4 addresses is the APNIC, which controls the distribution of addresses in the Asia region. According to the latest estimates, the breakdown should happen by mid-year or shortly thereafter.

Already LACNIC, responsible for the whole area of Latin America, still has a few million addresses to distribute, according to statistics available on the page.

I need to change something in my router?

Theoretically not. Unless you want to make your internal network uses IPv6, you will not need to make any changes to your router, be it LAN or WAN. To find out if the new type of addressing is supported on your router, the best way is to look for the manufacturer of the equipment. If he is older, it is not likely to support. But it’s nothing that a firmware update does not resolve.

Still, the internal network IPv6 will only work if all your computers support the new addressing protocol and also if your provider gives you an IPv6. As the new protocol does not support NAT, each device will have a real IP with which connects the Internet. It will be generated according to this address, which in turn, should allow more than 65,000 subnets.

And the responsibility for give an IPv6 will be the modem, which leads me to the next question…

Will I need a new modem?

It depends on your Internet provider. They have two alternatives when they need to offer IPv6 to its customers. The first is to create a system of tunnel broker, where you navigate with IPv6 but through an IPv4 address. The second is to replace the current modems that do not yet support the new address for new modems. Here in Brazil I can already kick which alternative providers should choose, aimed at saving features.

I came in contact with all the major ISPs in Brazil (Hi Velox, GVT, NET Virtua and Speedy) asking about the plans of each to the implementation of IPv6. Once they respond, I will make a new post with the answers.

I want to test this IPv6, how I do?

Currently no Brazilian provider has IPv6 available to give to your customers, but you can try it anyway. Following the tip of the player Mathias Kroyzanovski, I registered the service SixXS giving IPv6 addresses for testing through a tunnel broker.

You need to register on the site and wait for a human being to approve your registration, so they ask real data and yet you explain the reasons for which you want to use IPv6. They do this to better control who has access to the new address and avoid waste.

Once approved, the manual setup process in Windows was a bit tricky but SixSS own gives you the option to use the automatic configuration tool called AICCU. Within minutes I was browsing with IPv6 and sending ping all over the place.

Do you have any question that has not been answered? The Nic.br staff answered several other in IPv6.br site specific to the end user, which was also used as a source for this post. See if your question has been answered there.