IPv6: Difference between revisions
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|Feb 4, 2008 || IPv6 records added to DNS root | |Feb 4, 2008 || IPv6 records added to DNS root | ||
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|July 9, 2008 || GoDaddy adds support for IPv6 glue for .com/.net TLDs | |||
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|Mar 12, 2008 || Google Accessible via IPv6! | |Mar 12, 2008 || Google Accessible via IPv6! | ||
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|Jan 19, 2009 || Added IPv6 glue for my name servers (inferno,frosty) | |||
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Revision as of 21:31, 19 January 2009
Address Space
http://www.denis.lemire.name/images/wiki/ipv6-address-space.png
Allocation and Assignments
Minimum direct allocation is currently /32.
ISP assignments are as follows:
- /64 when it is known that one and only one subnet is needed.
- /56 for small sites, those expected to need only a few subnets over the next 5 years.
- /48 for larger sites
Addresses Space Size
- 340,282,366,920,938,463,463,374,607,431,768,211,456 unique IPs
- 42,535,295,865,117,307,932,921,825,928,971,026,432 IPs in 2000::/3 (1/8th of total address space)
- 1,208,925,819,614,629,174,706,176 IPs in a /48
- 536,870,912 /32 prefixes within 2000::/3
- 65,536 /48 prefixes with a /32
- 65,536 /64 subnets within a /48
- 35,184,372,088,832 /48 prefixes within 2000::/3
- 8,192 IPv6 /48 prefixes for every IPv4 address in 2000::/3 alone.
- 18,446,744,073,709,551,616 IPs within a /64 subnet
Special Prefixes
- ::/8
- ::/128 - Unspecified
- ::1/128 - loopback (IPv4 127/8 equivalent)
- ::ffff:0:0/96 - IPv4 mapped addresses
- 2000::/3 - IANA Global Unicast
- 2001::/32 - Teredo (RFC-4380)
- 2001:10::/28 - Orchid (RFC-4843)
- 2002::/16 - 6to4
- FC00::/7 - unique local addresses
- FC00::/8 is to be managed by a so-called "ULA-Central" for assigned /48s. As of 9-2007, this body has yet to be formed.
- FD00::/8 is allocated by appending a randomly-generated 40-bit string, to derive a valid /48. RFC4193 offers a suggestion on how to do the random generation, to try to guarantee a minimum-quality result if the user does not have access to a good source of random numbers.
- FE80::/10 - link-local addresses (169.254/16 equivalent)
- FECO::/10 - site-local (deprecated)
- FF00::/8 - multicast
The remaining prefixes are all reserved for future Unicast allocations.
Multicast Addresses
Multicast addresses exist within the 'FF00::/8 prefix.
- FF02::1 - all v6 hosts on local subnet (IPv4 equivalent 224.0.0.1)
- FF02::2 - all v6 routers on local subnet (IPv4 equivalent 224.0.0.2)
Protocol Translation Mechanisms
- faithd can be used to translate on a per service basis.
- ptrtd is a similar and better solution, but only appears to run on Linux at this time.
- NAT-PT is also an option but it has been deprecated.
- Using one of the above, totd is still required to translate DNS.
Useful or Interesting Links
- IPv6 6to4 Reverse DNS Delegation - The Number Resource Organization
- Global IPv6 Deployment Progress Report
- SixXS IPv6 to IPv4 and IPv4 to IPv6 Website Gateway
- IPv6: An Interview with Itojun
- Generate Unique Local Address
- IPv4 Address Report
- IPv6 configuration guide for FreeBSD users
History
| Date | Relevance |
|---|---|
| Mar 1996 | 6bone started |
| Jan 1, 2004 | 6bone prefix allocations halted. |
| Jul 20, 2004 | Experimented with Freenet6 and Hurricane Electric tunnels |
| Jun 6, 2006 | 6bone prefix phased out (3FFE::/16) |
| Oct 15, 2007 | IPv6 6to4 setup |
| Dec 17, 2007 | Tera-Byte prefix (2610:78:ad::/48) |
| Feb 4, 2008 | IPv6 records added to DNS root |
| July 9, 2008 | GoDaddy adds support for IPv6 glue for .com/.net TLDs |
| Mar 12, 2008 | Google Accessible via IPv6! |
| Jan 19, 2009 | Added IPv6 glue for my name servers (inferno,frosty) |