Hi Fred, > -----Original Message----- > From: ipv6-boun...@ietf.org [mailto:ipv6-boun...@ietf.org] On Behalf Of > Fred Baker (fred) > Sent: Sunday, June 23, 2013 4:12 PM > To: Tore Anderson > Cc: ipv6@ietf.org 6man-wg > Subject: Re: New Version Notification for draft-bonica-6man-frag- > deprecate-00.txt > > > On Jun 22, 2013, at 2:29 AM, Tore Anderson <t...@fud.no> wrote: > > - When a SIIT translator receives an IPv4 packet with DF=0 that would > > result in an IPv6 packet that would exceed the IPv6 link MTU, it will > > split the original packet into IPv6 fragments. > > It *could* fragment the IPv4 packet and send it in two unfragmented > IPv6 packets. > > > I cannot support your draft until it discusses or provides solutions > for > > the above considerations. > > I'm in a similar case with respect to protocols above IPv6 (OSPF and > NFS/UDP come quickly to mind) that depend on fragmentation to deal with > the issue. I think the Robustness Principle tells us that such > applications SHOULD figure out how to live with PMTU, but it also tells > us that we can't deprecate fragmentation unless all known instances > that depend on it have defined practical work-arounds. I suspect that > this would imply the re-creation of the fragmentation feature in an > intermediate protocol,
That is essentially what SEAL does - it provides an intermediate-level segmentation and reassembly capability that avoids the pitfalls of IP fragmentation. > which seems like a lot of work with little real gain. It's not that bad, and IMHO worth it. Thanks - Fred fred.l.temp...@boeing.com > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
