IPv6 subnetting reference
From Infogalactic: the planetary knowledge core
This IPv6 subnetting reference lists the sizes for IPv6 computer networks. Different types of network links may require different subnet sizes.[1] The CIDR netmask separates the bits of the network identifier prefix from the bits of the interface identifier. Selecting a smaller prefix size results in fewer number of networks covered, but with more addresses within those networks.[2]
Stateless address autoconfiguration works only with /64 prefixes.
CIDR Prefixes
2001:0db8:0123:4567:89ab:cdef:1234:5678 |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||| |||128 Single end-points and loopback |||| |||| |||| |||| |||| |||| |||| |||127 Point-to-point links (inter-router) |||| |||| |||| |||| |||| |||| |||| ||124 |||| |||| |||| |||| |||| |||| |||| |120 |||| |||| |||| |||| |||| |||| |||| 116 |||| |||| |||| |||| |||| |||| |||112 |||| |||| |||| |||| |||| |||| ||108 |||| |||| |||| |||| |||| |||| |104 |||| |||| |||| |||| |||| |||| 100 |||| |||| |||| |||| |||| |||96 |||| |||| |||| |||| |||| ||92 |||| |||| |||| |||| |||| |88 |||| |||| |||| |||| |||| 84 |||| |||| |||| |||| |||80 |||| |||| |||| |||| ||76 |||| |||| |||| |||| |72 |||| |||| |||| |||| 68 |||| |||| |||| |||64 Single End-user LAN (default prefix size for SLAAC) |||| |||| |||| ||60 Some (very limited) 6rd deployments (/60 = 16 /64) |||| |||| |||| |56 Minimal end sites assignment[3] (e.g. Home network) (/56 = 256 /64) |||| |||| |||| 52 (/52 = 4096 /64) |||| |||| |||48 Typical assignment for larger sites (/48 = 65536 /64) |||| |||| ||44 |||| |||| |40 |||| |||| 36 possible future Local Internet registry extra-small allocations |||| |||32 Local Internet registry minimum allocations |||| ||28 Local Internet registry medium allocations |||| |24 Local Internet registry large allocations |||| 20 Local Internet registry extra large allocations |||16 ||12 Regional Internet Registry allocations from IANA[4] |8 4
See also
References
- ↑ ARIN IPv6 Addressing Plans
- ↑ RIPE IP Allocation Rates
- ↑ RFC 6177 IPv6 Address Assignment to End Sites
- ↑ IANA IPv6 unicast address assignments
External links
- RFC 5375 "IPv6 Unicast Address Assignment Considerations", December 2008
- Preparing an IPv6 Address Plan Manual of national research and education network SURFnet
