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==References== {{Reflist|refs= <ref name="rfc4291-2-5-1">{{Cite IETF | rfc = 4291 | title = IP Version 6 Addressing Architecture - section 2.5.1. Interface Identifiers | publisher = [[IETF]] | section = 2.5.1 | author1 = R. Hinden | author2 = S. Deering | authorlink2= Steve Deering | date = February 2006 | quote = For all unicast addresses, except those that start with the binary value 000, Interface IDs are required to be 64 bits long and to be constructed in Modified EUI-64 format. }} (Updated by RFC 5952, RFC 6052, RFC 7136, RFC 7346, RFC 7371, RFC 8064.)</ref> <ref name="rfc4862">{{Cite IETF | rfc = 4862 | title = IPv6 Stateless Address Autoconfiguration - section 5.5.3.(d) Router Advertisement Processing | publisher = [[IETF]] | section = 5.5.3 | author1 = S. Thomson | author2 = T. Narten | author3 = T. Jinmei | quote = It is the responsibility of the system administrator to ensure that the lengths of prefixes contained in Router Advertisements are consistent with the length of interface identifiers for that link type. [...] an implementation should not assume a particular constant. Rather, it should expect any lengths of interface identifiers. | date = September 2007 }} (Updated by RFC 7527.)</ref> <ref name="rfc2464">{{Cite IETF | rfc = 2464 | title = Transmission of IPv6 Packets over Ethernet Networks - section 4 Stateless Autoconfiguration | publisher = [[IETF]] | section = 4 | author = M. Crawford | date = December 1998 | quote = The Interface Identifier [AARCH] for an Ethernet interface is based on the EUI-64 identifier [EUI64] derived from the interface's built-in 48-bit IEEE 802 address. [...] An IPv6 address prefix used for stateless autoconfiguration [ACONF] of an Ethernet interface must have a length of 64 bits. }} (Updated by RFC 6085, RFC 8064.)</ref> <ref name="rfc6164">{{Cite IETF | rfc = 6164 | title = Using 127-Bit IPv6 Prefixes on Inter-Router Links | publisher = [[IETF]] | author1 = M. Kohno | author2 = B. Nitzan | author3 = R. Bush | author4 = Y. Matsuzaki | author5 = L. Colitti | author6 = T. Narten | date = April 2011 | quote = On inter-router point-to-point links, it is useful, for security and other reasons, to use 127-bit IPv6 prefixes. }}</ref> <ref name="rfc6547">{{Cite IETF | rfc = 6547 | title = RFC 3627 to Historic Status | author = W. George | publisher = [[IETF]] | date = February 2012 | quote = This document moves "Use of /127 Prefix Length Between Routers Considered Harmful" (RFC 3627) to Historic status to reflect the updated guidance contained in "Using 127-Bit IPv6 Prefixes on Inter-Router Links" (RFC 6164). }}</ref> <ref name="rfc4291-2">{{Cite IETF | rfc = 4291 | title = IP Version 6 Addressing Architecture - section 2 IPv6 Addressing | publisher = [[IETF]] | section = 2 | author1 = R. Hinden | author2 = S. Deering | authorlink2= Steve Deering | date = February 2006 | quote = There are no broadcast addresses in IPv6, their function being superseded by multicast addresses. [...] In IPv6, all zeros and all ones are legal values for any field, unless specifically excluded. }}</ref> <ref name="rfc4291-2-6-1">{{Cite IETF | rfc = 4291 | title = IP Version 6 Addressing Architecture - section 2.6.1 Required Anycast Address | section = 2.6.1 | publisher = [[IETF]] | author1 = R. Hinden | author2 = S. Deering | authorlink2= Steve Deering | date = February 2006 | quote = This anycast address is syntactically the same as a unicast address for an interface on the link with the interface identifier set to zero. }}</ref> <ref name="ARIN">{{cite web | title = IPv6 Addressing Plans | publisher = ARIN IPv6 Wiki | url = http://www.getipv6.info/index.php?title=IPv6_Addressing_Plans&oldid=2998 | quote = All customers get one /48 unless they can show that they need more than 65k subnets. [...] If you have lots of consumer customers you may want to assign /56s to private residence sites. | access-date = 2010-04-25 | archive-date = 2010-04-26 | archive-url = https://web.archive.org/web/20100426161404/http://www.getipv6.info/index.php?title=IPv6_Addressing_Plans&oldid=2998 | url-status = live }}</ref> <ref name="RFC 6177">{{Cite IETF | rfc = 6177 | bcp = 157 | title = IPv6 Address Assignment to End Sites | author1 = T. Narten | author2 = G. Huston | author3 = L. Roberts | date = March 2011 | publisher = [[IETF]] | issn = 2070-1721 | quote = APNIC, ARIN, and RIPE have revised the end site assignment policy to encourage the assignment of smaller (i.e., /56) blocks to end sites. }}</ref> }}
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