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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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 December, 2006
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Scale of IPv6 Internet
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As of December 2006, the United States of America is 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, and Germany has barely grown larger than Japan and the United Kingdom.
On the other, Japan is the leader in the count of IPv6 address block allocated to the service provider and end user by LIR (CHART 2).
In this count, the number of address block which is /48 prefixes is converted to a unit.
CHART 1: Number of allocated IPv6 address block classified by country (through 2006)
CHART 2: Number of allocated /48 prefixes per 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 3).
That result explains that IPv6 Internet also seems to be under the growth as IPv4 Internet carries on their growth.
In addition, the result of this month has been similar to last month.
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 4).
CHART 3: Ratio between IPv4 and IPv6 traffic at IX (through 2006)
CHART 4: 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 5).
In addition, it was between 3 and 3.5 hops without the snapshot of peak condition.
Although this average has been lower than last month as of this month, it has converged in about 3 hops.
That trend was same as the result by month (CHART 6).
CHART 5: Average os AS path length (through 2006)
CHART 6: Average os AS path length (Dec. 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 December 2006 (CHART 7).
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.
That trend seemed to be same as the result through this year.
CHART 7: Ratio of .JP domains which DNS supports IPv6 by 2nd LD (through 2006)
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