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IPv6 is occupied the interest of the next generation internet in the world, and the IPv6 internet is growing steadily. In Japan, there are already many kinds of hardware products, applications, and services supporting IPv6 to deploy it.
This research aims to measure the progress of IPv6 usage and operation. This activity is based upon the contribution by the ministry of internal affairs and communications of Japan from 2003.
- 2003 - 2005 : 'a research on the migration of the Internet Technology to IPv6'
- 2006 - : 'a research on the status of the utilization of IPv6 Internet'
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 November 2006
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Scale of IPv6 Internet
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As of November 2006, the United States of America has been the leader acquiring the number of allocation of IPv6 address block (CHART 1).
That number has been increased compared with last month and stretched their lead. Germany (2nd place), Japan (3rd place), and the United Kingdom (4th place) also have increased the number of allocation.
CHART 1: Number of allocated IPv6 address block classified by country (through 2006)
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Migration status of IPv6 Internet
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According to the comparison of the traffic ratio between IPv4 and IPv6 through an IX, it has kept a stable condition (CHART 2).
That result explains that IPv6 Internet also seems to be under the growth as IPv4 Internet carries on their growth.
In the detailed result in this month, a ratio in weekend was fluctuated decreasingly.
It has been considered that IPv6 Internet is used for business mainly (CHART 3).
CHART 2: Ratio between IPv4 and IPv6 traffic at IX (through 2006)
CHART 3: Ratio between IPv4 and IPv6 traffic at IX (Nov. 2006)
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Reliability of IPv6 internet
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As the result of average of advertised AS path length of IPv6 route by BGP4+, it converged between 3 and 5 (CHART 4).
In addition, it was between 3 and 3.5 hops without the snapshot of peak condition.
According to the past research on BGP routing information of IPv4, the path length of IPv6 was smaller than IPv4.
That trend was same as the result by month (CHART 5).
There are a couple of reasons of those results.
Firstly, an intentional allocation is the assumption for IPv6 address allocation.
Secondly, the structure of IPv6 Internet is still simple since IPv6 Internet is not deployed yet.
If IPv6 Internet succeeds to carry on that simple structure in spite of its growth, IPv6 Internet will be expected to operate easier and more reliable than complicated IPv4 Internet.
CHART 4: Average os AS path length (through 2006)
CHART 5: Average os AS path length (Nov. 2006)
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Characteristic of IPv6 Internet
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In the count of the ratio of domains between IPv4 and IPv6 in Japan which DNS supports IPv6 by 2ndLD, such network operator like ISP is the leader of use of IPv6 as of November 2006 (CHART 6).
Governments including research organization using ".ad", local governments using ".lg", community using ".geo" and academic organization using ".ac" have followed.
On the other, the ratio of such private organization using ".ne, .or., and .co" are low.
It explains that the public sectors including government and academia have been supported to clarify the position of IPv6 and preceded the research and development activities by the policy on deployment of Information Technology called "IT new reform strategy".
Since that process of deployment of IPv6 which the public sector supported is similar to the deployment of IPv4, IPv6 is on the process to deploy as IPv4 did.
CHART 6: Ratio of .JP domains which DNS supports IPv6 by 2nd LD (through 2006)
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