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Old 02-01-2011, 09:17 AM   #1 (permalink)
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Default The forced transition to IPv6 poses hazards

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With the last IPv4 addresses about to be allocated, the good news is that IT managers -- at least in the U.S. and Europe -- don't suddenly have to get the next Internet Protocol working.

The bad news is that there are some hazards both in putting off adoption of IPv6 and in implementing it, according to vendors and industry analysts.

If the Asia-Pacific Network Information Center is granted two more large blocks of IP addresses, which it is entitled to because its addresses are being snatched up so fast, then a rule will kick in that forces the Internet Assigned Numbers Authority (IANA) to divide the remaining five blocks of IPv4 addresses among the world's five regional registries. Once the regional bodies run out of those addresses, they will have nowhere to turn for new ones.

IPv6, introduced in the late 1990s, offers an almost unlimited number of addresses, compared with approximately 4.3 billion addresses for IPv4. While many devices use privately held addresses that are reused on the same LAN, unique IP addresses are usually needed for servers and other types of endpoints. Particularly in fast-growing parts of the world, such as India and China, those unique addresses are being consumed quickly. The two versions aren't compatible, so, for example, client systems that only have an IPv6 address can't get to content on servers that only have IPv4 addresses.
Source: The forced transition to IPv6 poses hazards | Networking - InfoWorld
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