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30 Ιουν 2012 (πριν από 5 χρόνια και 24 μέρες)

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What is IPv6?
For any network to function, each system must have a unique address in order for traffic to be properly directed. This requires a
s
tandardized protocol for creating the addresses and a system for tracking which addresses are already in use.
The Internet Engineering Task Force (IETF), in cooperation with the W3C and ISO/IEC standards bodies, is an open standards organization
t
hat develops and maintains the Internet Protocol (IP), which governs the addressing of systems connected to the Internet. IPv6 is
IETF’s latest version of the protocol. Its final specifications were released in 1998, with specific aspects in the years since.
IPv6 replaces IPv4, released in 1981. Transition to the new protocol is important because, due to the rapid growth of the Internet,
nearly every IPv4 address has been assigned. IPv6 will eventually replace IPv4, with both coexisting over a multi-year transition period.
SoftLayer
®
has completely integrated IPv6 address ordering and management into the customer portal and API.
Why is IPv6 better than IPv4?
IPv4 uses 32-bit numerical addresses, such as 10.123.456.789. There are only just over four billion, unique addresses that can be created
in that format. Nearly all of those four billion addresses have been allocated or reserved for use, and as more users and devices connect
to the Internet, more IP addresses need to be available.
IPv6 uses 128-bit numerical addresses, allowing for an exponentially larger number of unique addresses—approximately 340 trillion,
trillion, trillion (practically inexhaustible). This allows greater flexibility in allocating addresses and routing traffic, and eliminates the
need for network address translation, allowing for improved routing and network configurations.
Who gets the remaining IPv4 addresses?
The Internet Assigned Numbers Authority (IANA) divides the IPv4 address space between five Regional Internet Registries (RIRs) who
then assigns the addresses as they are requested. Their activities are governed by a global distribution policy that was created and is
managed through the consensus of all five RIRs.
How quickly do we need to move to IPv6?
No one can be sure when all IPv4 addresses will be used up because there is no way to predict the rate of how quickly address request
rates will be made. But at current rates, the supply of available IPv4 addresses will likely run out in 2011 or 2012. Geoff Huston, Chief
Scientist at APNIC, the Regional Internet Registry for the Asia Pacific region, tracks IPv4 allocation and depletion rates at
http://www.potaroo.net/tools.
Will the Internet break when the IPv4 addresses run out?
No. Both IPv4 and IPv6 will coexist over a multi-year transition period.
However, IPv4 addresses and IPv6 addresses can’t communicate directly with each other, and eventually no new IPv4 addresses will be
assigned. Service providers and network operators need to invest time, money, and training in their teams and infrastructure to make
them IPv6-ready, and provide the transitional backward compatibility to IPv4. End users might not be able to reach certain sites or
services if the site or service host and the end-user’s ISP are on different protocols and have not made appropriate provisions.
IPv6 FAQs
S
oftLayer
®
T
echnologies
Contact Us
866.398.7638
214.442.0602
softlayer.com
© 2011 SoftLayer Technologies, Inc. 11SLT015 rev062711
How will the IPv4 to IPv6 transition affect end users?
End users will not notice much impact, as they do not deal with IP addresses for most of their online activity. However, they might not
be able to reach certain sites or services if the site or service host and the end-user’s ISP are using different protocols and have not made
appropriate provisions.
Contact Us
866.398.7638
214.442.0602
softlayer.com
© 2011 SoftLayer Technologies, Inc. 11SLT015 rev062711