Following are the different unicast addresses that IPv6 supports:
■ Global aggregatable address (also called global unicast address)
■ Link-local address
■ IPv4-compatible IPv6 address
Global aggregatable addresses and link-local addresses are discussed in the next two sections, respectively. IPv4-compatible IPv6 addresses are described in the later "IPv4-to-IPv6 Transition Strategies and Deployments" section.
NOTE Site-local unicast addresses are another type of IPv6 unicast address; however, the use of site-local addresses was deprecated in September 2004 by RFC 3879, Deprecating Site Local Addresses, and future systems must not implement any support for this type of address. Site-local unicast addresses were similar to private addresses in IPv4 and were used to address a site without having a global prefix. Site-local addresses used the prefix FEC0::/10 (binary 1111 1110 11) with a subnet identifier (a 16-bit field) and an interface identifier (a 64-bit field) concatenated after the prefix. Site-local addresses were considered private addresses to be used to restrict communication to a limited domain.
IPv6 routers must not advertise routes or forward packets that have site-local source or destination addresses, outside the site.
KEY Every IPv6-enabled interface must contain at least one loopback (::1/128) and one linkPOINT local address. Optionally, an interface may have multiple unique local and global addresses.
Was this article helpful?
What you need to know about… Project Management Made Easy! Project management consists of more than just a large building project and can encompass small projects as well. No matter what the size of your project, you need to have some sort of project management. How you manage your project has everything to do with its outcome.