December 29, 2004 3:15 PM PST
China launches largest IPv6 network
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The China Education and Research Network Information Center (CERNIC) announced the Saturday launch of the network--called CERNET2--which is thought to be the largest single IPv6 network created. CERNIC claimed it makes China a world leader in the race to build the next generation of the Internet.
IPv6 exponentially increases the number of possible Internet protocol (IP) addresses. It was created and deployed in response to the fear that the existing Internet address pool could run dry within a few years as more people go online, especially as Web use in Asia rises sharply.
IPv4, the incumbent Internet protocol standard, gives its data packets just 32 bits of address space. By increasing this to 128 bits, IPv6 provides billions more IP addresses and allows many more devices to be simultaneously linked to the Internet.
Many network operators and equipment vendors are pushing IPv6. However, most companies have been reluctant to spend the money needed to make their networks IPv6-compatable by upgrading IP stacks on network gear, applications, PCs and servers.
Some have said that techniques such as network address translation, which lets up to 257 nodes in a corporation sit behind a single IP address, mean it is possible to work around IPv4's limitations.
China's National Development Reform Commission has set aside 1.4bn yuan ($169 million) to support six next-generation Internet networks, according to People's Daily , China's main daily newspaper. Half of it will be used on projects linked to the university network, with the remaining money given to five telecom operators.
China is not the only Asian country with a strong interest in IPv6. Japan has already implemented an IPv6 production network, which is used by every service provider in the country. South Korea is working with the EU to develop applications and services using IPv6.
Some experts have predicted that once China has embraced IPv6, Western countries that wish to do business with Asia will have to upgrade their own networks.
Ingrid Marson of ZDNet UK reported from London. ZDNet UK's Graeme Wearden contributed to this report.
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IPv4,
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Asia
I have no idea where the number 257 came from, but it is not correct. You are limited only by the number of ports, which would around 64,000. (Though, 64,000 would be quite a lot)
"Some have said that techniques such as network address translation, which lets up to 257 nodes in a corporation sit behind a single IP address, mean it is possible to work around IPv4's limitations."
Corporations are not limited to '257' nodes behind a single IP address. I have no idea where you got 257...
A 24 bit subnet using private addressing (RFC1918) can be network-address-translated (NAT) behind one public IP address, resulting in about 253 usable addresses (256 is the max for a 24 bit subnet, a few of which are reserved). Although, corporations are not limited to using a single /24 subnet, they can use private addressing to subnet as they choose which can allow them to have tens of thousands, or even millions, of private addresses behind one public IP address.
I just dont see how you can consider yourself a leader just on the fact that it is IPv6 with minimal locations connected. I would say that since they didnt mention the speed of the network that it is nothing major maybe topping out around 2.4gigabits/sec.