On Jun 24, 2013, at 10:39 PM, Brian E Carpenter <brian.e.carpen...@gmail.com> wrote:
> On 25/06/2013 10:11, Ronald Bonica wrote: >>> "New IPv6 host implementations MAY support IPv6 fragmentation and >>> reassembly" >>> break things. "New IPv6 host implementations MAY support IPv6 >>> fragmentation but MUST support reassembly" may superior. This will >>> aging out fragmentation over a longer period, new hosts will not use it >>> but existing - applications will not break. >> >> I could live with this. Would it satisfy other folks' objections? > > I think it's far too soon in developing the analysis to be able > to answer that question. This isn't cooked yet. > >> >>> "Network operators MAY filter IPv6 fragments." is a policy thing and >>> costumers have to deal with that already. So it is ok from my point of >>> view. >> >> Ack. It is a statement of fact, not an IETF imposed requirement. > > If it's a statement of fact, it shouldn't use RFC 2119 language. It > should simply state the truth: "Network operators might filter IPv6 > fragments." You mean like http://tools.ietf.org/html/draft-taylor-v6ops-fragdrop-01 says? "This memo provides observational evidence for the dropping of IPv6 fragments along a significant number of paths, explores the operational impact of fragmentation and the reasons and scenarios where drops occur, and considers the effect of fragment drops on applications where fragmentation is known to occur, particularly including DNS." It references: http://www.nlnetlabs.nl/downloads/publications/pmtu-black-holes-msc-thesis.pdf (also a fun read). W > > Brian > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- > -- "Let's just say that if complete and utter chaos was lightning, he'd be the sort to stand on a hilltop in a thunderstorm wearing wet copper armour and shouting 'All gods are bastards'." -- Rincewind discussing Twoflower (Terry Pratchett, The Colour of Magic) -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
