Cutting to the chase, and assuming that the next version will have more analysis and observational evidence, I'm thinking something like the following:
3. Recommendation This memo deprecates IPv6 fragmentation and the IPv6 fragment header. Application and transport layer protocols SHOULD support effective PMTU discovery [RFC4821], since ICMP-based PMTU discovery [RFC1981] is unreliable. Any application or transport layer protocol that cannot support effective PMTU discovery MUST NOT in any circumstances send IPv6 packets that exceed the IPv6 minimum MTU of 1280 bytes. IPv6 stacks and forwarding nodes SHOULD continue to support inbound fragmented IPv6 packets as specified in [RFC2460]. However, this requirement exceeds the capability of some types of forwarding node such as firewalls and load balancers. Therefore implementers and operators need to be aware that on many paths through the Internet, IPv6 fragmentation will fail. Legacy applications and transport layer protocols that do not conform to the previous paragraph can expect connectivity failures as a result. -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
