Internet Protocol, Version 6 (IPv6) Specification
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S. Deering, R. Hinden · 2017-07
Abstract
RFC 8200 is the current standard specification for Internet Protocol version 6 (IPv6), defining the packet format, addressing, extension headers, and packet processing rules. It is the consolidated successor to RFC 2460 and incorporates clarifications accumulated over nearly two decades of IPv6 deployment experience.
Why This RFC Matters
RFC 8200 elevated IPv6 from 'Draft Standard' to 'Internet Standard' — a formal recognition by the IETF that IPv6 had achieved the implementation and deployment maturity required for the highest standardization level. The RFC consolidates Steve Deering and Bob Hinden's original IPv6 design from the mid-1990s with twenty years of operational clarifications. Its 128-bit address space (about 340 undecillion addresses) ensures the internet will never again face the scarcity that drove CIDR and NAT. RFC 8200 is the definitive reference for IPv6 implementers, and its promotion to Internet Standard marked a turning point in global IPv6 adoption momentum.