Prepare for the upcoming Global IPv6 day

Bkjia.com, September June 7: as early as this spring, as you may expect, the last part of IPv4 addresses were allocated to regional Internet registrars and then delivered to ISP suppliers and other enterprises. Unlike many optimistic estimates, we have used up all resources. Yes, there are still a few months before the IP addresses in the world are sold out, and you may be able to find out the unused Class C addresses from Some uncommon places. But for the vast majority of us, it is time to develop a transitional plan to migrate our company to IPv6.

Of course, people have been discussing this topic for several years. I remember I mentioned in a joke in an article in 1992 that I planned to widely collect unused IP addresses and engage in brokerage services. Although it has been with us for decades, it is inevitable that the IPv4 era is coming to an end. Unlike the imaginary scenario, what we face today is a realistic issue that requires urgent attention.

In order to emphasize the current pressing situation, a team of engineers hosted by the Internet Association has confirmed that it will be formally established on Wednesday, that is, June 8, to conduct round-the-clock testing on the new IP protocol. A series of web products will launch IPv6 on the site on the same day as an example. In addition, some vendors have begun to collect a large number of guidance and suggestions to help network managers in the IT department develop new plans tailored to their own needs.

What are the necessary conditions for a successful transition?First of all, this is obviously a very difficult task, and it can be compared with the problems associated with the emergence of the Internet itself at the beginning.

◆ Internet service providers must provide available IPv6 connections for all their users.This means that in most cases, the supplier must replace or upgrade the routing device and other network switching devices to adapt to the new IP protocol.

◆ Network companies need to provide IPv6-based services.We will see some service instances on Wednesday, when those large website operators such as Google, Facebook, Microsoft and Yahoo will provide new versions that only support IPv6 Access.

◆ The operating system vendor may need to provide update tools for specific software.Most mainstream desktop operating systems currently support IPv6, such as the following, from Apple Mac ). However, if you are using a relatively old XP or Mac system, you may have to face some problems.

◆ Key suppliers will need to establish an IPv6 Matching System for each other.This actually happened, but obviously we still need more matching systems, and some tests on Wednesday will focus on finding links that cannot work normally, especially connection lines.

◆ Hardware and home gateway manufacturers may need to upgrade the firmware to support IPv6.The OpenDNS website provides a series of instructions on its website.) through this instruction, you may learn how to use its "sandbox" tool to support the DNS of the IPv6 system.

If you want to check the content that can be used for reference, you can obtain a detailed report by visiting the drive test site created by Jason Fesler, learn about the parts of your basic Internet device that need to be updated. For details, see:

The best starting point for our technical reading is Cisco's Internet Protocol logs for the current issue. There are several articles related to IPv6, including what activities will be carried out on the world IPv6 day, what problems will be caused by rumor parsing and IPv4 address space depletion.

Enterprise Users have four different basic policies to cope with IPv6 changes:

1. IPv4 and IPv6 Dual-stack protocols. In our routers, some dual-stacks can connect them to the ISP ports that run the same dual-stack.This may be the easiest solution, but it will definitely destroy all existing NAT connections. If you used NAT as a security guarantee, you may need to make great efforts in this regard, because once IPv6 is used, our entire subnet will be directly connected to the Internet.

Channels 2. 6 to 4. This method is used on my Mac, because we can see that the IPv6 address prefix is 2002.That is to say, the last segment of the IPv6 address actually uses the original IPv4 address directly. This will mainly cause some performance problems, and some firewall software will block this special protocol through port 41.

3. The Teredo channel is another standby Channel Protocol. It also has clients and servers to convert IPv4 addresses and IPv6 addresses.Some firewall software will block UDP port 3544, which may also cause some problems.

4. Use proxy channels and other devices to respond.

I wish you all the best in the Agreement transition process. And never delay again: the last moment has arrived!

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