IPv6 (global unicast address)
The effective range (scope) of IPv6 address unicast is classified as follows.
- global unicast address
- Site-local unicast address (deprecated)
- link-local unicast address
Global unicast addresses are described here.
A global unicast address is defined as a globally unique unicast address, equivalent to the IPv4 global address. The first 3 bits start with '001' and the valid range can also be written as '2000::/3'.
The structure of a global unicast address is as follows.
Within the address range, further usage is determined as follows:
|2001::/16||IPv6 Internet||Currently, IANA has assigned 2001::/16 as a global unicast address. When building a network with IPv6, addressing will be performed from the address range of 2001::/16.|
|2002::/16||6to4 transition mechanism||A special address used in a 6to4 tunnel when transitioning from IPv4 to IPv6.|
|2003::/16～3ffd::/16||unassigned||It is currently unassigned, but can be assigned to a router interface.|
|3ffe::/16||6bone||For research and development of IPv6|