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This IPv6 subnetting reference lists the sizes for IPv6 computer networks. Different types of network links may require different subnet sizes.〔192.168.1.3(ARIN IPv6 Addressing Plans )〕 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.〔(RIPE IP Allocation Rates )〕 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〔 (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〔(IANA IPv6 unicast address assignments )〕 |8 4 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「IPv6 subnetting reference」の詳細全文を読む スポンサード リンク
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