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Status:

BEST CURRENT PRACTICE

Authors:

M. Boucadair
A. Petrescu
F. Baker

Stream:

IETF

Source:

v6ops (ops)

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Abstract

IPv6 prefix length, as in IPv4, is a parameter conveyed and used inIPv6 routing and forwarding processes in accordance with theClassless Inter-domain Routing (CIDR) architecture. The length of anIPv6 prefix may be any number from zero to 128, although subnetsusing stateless address autoconfiguration (SLAAC) for addressallocation conventionally use a /64 prefix. Hardware and softwareimplementations of routing and forwarding should therefore impose norules on prefix length, but implement longest-match-first on prefixesof any valid length.

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.