- File formats:
- BEST CURRENT PRACTICE
- M. Boucadair
- v6ops (ops)
Cite this BCP: TXT
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IPv6 prefix length, as in IPv4, is a parameter conveyed and used in IPv6 routing and forwarding processes in accordance with the Classless Inter-domain Routing (CIDR) architecture. The length of an IPv6 prefix may be any number from zero to 128, although subnets using stateless address autoconfiguration (SLAAC) for address allocation conventionally use a /64 prefix. Hardware and software implementations of routing and forwarding should therefore impose no rules on prefix length, but implement longest-match-first on prefixes of any valid length.
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 4844.