HIPv2: Host Identity Tag structure

[Xin]

"The new structure has a number of bits for identifying the employed algorithms. These bits need to be parsed and the HI verification algorithms must be chosen accordingly. Also, when creating a HIT, the right bits must be set according to the employed Algorithms." by Tobias

In addtion to the new OGA bits in a HIT, according to a feedback of HIPWG, the HIT prefix will also change in HIPv2. This prefix change is necessary for a dual-version HIPL, otherwise it is hard to tell a HIT contains OGA bits or not.

[Miika Komu (miika-iki)]

From Julien:
  ORCHIDv2 prefix is 2001:20::/28

http://www.iana.org/assignments/iana-ipv6-special-registry