DOCOMO will introduce "IPv6 Single Stack" from the spring of 2022 to provide an test environment for developers from July 1st
From the spring of 2022, NTT DOCOMO has introduced the IPv6 Single Stack method, which allocates only IPv6 addresses in mobile data Childmmunication.There is no need to apply or change settings on the user side.Before that, the Childmpany plans to provide developers a Childnnection test environment from July 1 to December 3.
[Postscript: 17:20] I added that it can be used in AHAMO.At the same time, I reviewed some notation
What is the "IPv6 single stack method" in the first place?
There are two types of servers on the Internet, "IPv4 address" and "IPv6 address".When you usually access the website, "http: // www.ITMEDIA.Child.Use an address that contains "domain name" such as "JP/", but the "DNS (Dynamic Name System) server" server somewhere on the Internet "converts" the IPv4 address or IPv6 address is reached.It is.
Recently, the number of websites with both IPv4 addresses and IPv6 addresses has increased, but in sites that have existed for a long time have only IPv4 addresses.For this reason, many Internet connection services adopt a "dual stack method" that allocates both IPv4 addresses and IPv6 addresses to the terminal.
However, with the increase in services that use the Internet and the increase in IoT devices, the IPv4 address is chronic.The new allocation of the address has been completed, that is, because it is "depleted" (reference link).Therefore, there is a possibility that there will be problems when providing new services using the Internet.
What should I do to save a little IPv4 address? One of the solutions is the IPv6 Single Stack method, which allocates only the IPv6 address to the device.
Theoretically, the IPv6 address is assigned to "2 128 (approx. 340 澗)".Compared to the IPv4 address "2 (approximately 4.3 billion)", it is thought that it will not be easily depleted because there is a tremendous number ( *).
( *) Includes "private addresses" that are not used on the published Internet
However, since the IPv4 Internet and the IPv6 Internet are "separate worlds", terminals that only have IPv6 addresses cannot access sites that only have IPv4 addresses.
Therefore, the Internet connection service that adopts the IPv6 single stack system makes it possible to access sites and services that have only IPv4 addresses by performing address conversion processing at the connection service service (exchange bureau).
IPv6シングルスタック方式では、端末にIPv6アドレスのみ割り当てることでIPv4アドレスを節約できる。IPv4アドレスのみ持つサイトやサービスへのアクセスは、接続サービスのサーバで変換処理を行うことで可能だ（ニュースリリースから作成）About the connection test environment
In the case of IPv6 single stacking method, access to sites and services with only IPv4 addresses will be performed through the conversion server.For this reason, DOCOMO recommends content creators to perform connection tests in the test environment.
To connect to the test environment, an Xi (LTE) / 5G line (including AHAMO) contracted for SP mode is required.It is recommended that the exams be performed on one of the following terminals.
Detailed usage conditions can be confirmed from the special site.
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