On 4/9/19 00:02, Templin (US), Fred L wrote: > Fernando, > >> -----Original Message----- >> From: Fernando Gont [mailto:[email protected]] >> Sent: Tuesday, September 03, 2019 1:49 PM >> To: Tom Herbert <[email protected]>; Bob Hinden <[email protected]> >> Cc: Templin (US), Fred L <[email protected]>; [email protected]; >> IESG <[email protected]>; Joel Halpern >> <[email protected]>; [email protected]; >> [email protected] >> Subject: Re: [Int-area] Alissa Cooper's No Objection on >> draft-ietf-intarea-frag-fragile-16: (with COMMENT) >> >> On 3/9/19 23:33, Tom Herbert wrote: >>> Bob, >>> >>> I agree with Fred. Note, the very first line of the introduction: >>> >>> "Operational experience [Kent] [Huston] [RFC7872] reveals that IP >>> fragmentation introduces fragility to Internet communication". >>> >>> This attempts to frame fragmentation as being generally fragile with >>> supporting references. However, there was much discussion on the list >>> about operational experience that demonstrates fragmentation is not >>> fragile. >> >> Discussion is not measurements. Do you have measurements that suggest >> otherwise? >> >> We did separate measurements, with different methodologies, and they >> suggest the same thing. You can discuss as much as you want. But that >> will not make fragmentation work. >> >> >> >>> In particular, we know that fragmentation with tunnels is >>> productively deployed and has been for quite some time. So that is the >>> counter argument to the general statement that fragmentation is >>> fragile. With the text about tunneling included in the introduction I >>> believe that was sufficient balance of the arguments, but without the >>> text the reader could be led to believe that fragmentation is fragile >>> for everyone all the time which is simply not true and would be >>> misleading. >> >> "fragile" means that it fails in an uncceptably large number of cases. >> ~30 failure rate is not acceptable. ~20% isn't, either. > > What if we fragment the payload packet instead of the delivery packet? > Wouldn't that give a 0% failure rate?
Sure. At which point you are using ip fragmentation in a limited domain, and that's *not* the case this document is addressing, right? -- Fernando Gont SI6 Networks e-mail: [email protected] PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492 _______________________________________________ Int-area mailing list [email protected] https://www.ietf.org/mailman/listinfo/int-area
