IPv6 rapid deployment
6rd stands for IPv6 Rapid Deployment and is a way for an Internet Service Provider to provide its customers with IPv6-enabled terminals, without the provider- side infrastructure must be completely switched over to IPv6.
It is based on the ideas of 6to4, but does not use a specific address range, but the IPv6 address range of the provider, so that there are no accessibility problems, thus 6to4 has to suffer sometimes.
6rd was developed by Rémi Després late 2007/early 2008, the French ISP free. Since August 2010, 6rd in RFC 5969 specified.
As with the 6to4 IPv6 address is algorithmically formed from the public IPv4 address of the connection. However, it is not specified which parts of the IPv4 address is the area in which the IPv6 address stored. The providers can thus use even for them a suitable mapping.
Usually gets a provider from its RIR a / 32 network from the IPv6 address pool assigned. That is, the top 32 bits of the IPv6 address are thus established. Now can be easily mapped into the following 32 bits of the IPv6 address of the 32 bits of the IPv4 public address, so that each port is now a / 64 network can be assigned.
However, it is common for IPv6 to spend to end customers larger address spaces, such as / 56 or / 52 Since only large ( multi-) assigned a larger IPv6 address space as / 32 national provider, a mapping is usually required, which takes only parts of the IPv4 address in the IPv6 address, eg the lower 24 bits.
6rd, many providers already in operation.
IP addresses will continue to adjudication as a person-related data, as a personal reference can be made (at least for the connection owner) with them. Only abbreviated addresses may in the handling of IP addresses, therefore, the Düsseldorf district 's view, be used, ie that for example the last octet of an IPv4 address is zeroed out, so that no personal reference can be produced, different IP address- based services, such as Geolocation, but remain possible.
For IPv6 addresses, a shortening to 40 bits is recommended. It thus remain at a 32- bit prefix of the provider left more than 8 bits of IPv 4 address of the connection owner, so no personal reference can be established.