Re: [v6ops] PMTUD issue discussion
"Templin, Fred L" <Fred.L.Templin@boeing.com> Tue, 26 August 2014 15:43 UTC
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From: "Templin, Fred L" <Fred.L.Templin@boeing.com>
To: Fernando Gont <fgont@si6networks.com>, "Fred Baker (fred)" <fred@cisco.com>, Andrew 👽 Yourtchenko <ayourtch@gmail.com>
Thread-Topic: [v6ops] PMTUD issue discussion
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Date: Tue, 26 Aug 2014 15:42:51 +0000
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Cc: IPv6 Ops WG <v6ops@ietf.org>
Subject: Re: [v6ops] PMTUD issue discussion
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Hi Fernando, > -----Original Message----- > From: v6ops [mailto:v6ops-bounces@ietf.org] On Behalf Of Fernando Gont > Sent: Tuesday, August 26, 2014 8:35 AM > To: Fred Baker (fred); Andrew 👽 Yourtchenko > Cc: IPv6 Ops WG > Subject: Re: [v6ops] PMTUD issue discussion > > Hi, Fred, > > On 08/26/2014 12:13 PM, Fred Baker (fred) wrote: > >> I think it would be useful to see the discussion of this measure > >> and its applicability/tradeoffs in the draft. > > > > It seems like it might have value to also test the interaction > > with various initial window settings, and look at its inclusion in > > other relevant OS’s including FreeBSD, Windows, and MacOSX. > > FWIW, while RFC4821 can work without relying on PLPMTUD at all, some > OSes (such as Windows) only fall back to ICMP-less PMTUD as part of > "ICMP blackhole detecion" -- and they have been doing this for years > now... I think the point is that PLPMTUD is not well supported in modern OSes in the spirit in which it was specified in RFC4821. That needs to change. Thanks - Fred fred.l.templin@boeing.com > > My reading of 4821 says it’s grand theory, but I’m not precisely > > sure how I would write the code. As an initial setting, for > > example, I could imagine sending an initial burst containing a 9K > > byte packet, a 1500 byte > > Unlikely if the underlying link-layer technology is Ethernet (PMTUD > will never be assumed to be larger than your own MTU). > > Additionally, I doubt you'd employ different packet > sizes/assumed_PMTUDs all at once. > > Thanks, > -- > Fernando Gont > SI6 Networks > e-mail: fgont@si6networks.com > PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492 > > > > > _______________________________________________ > v6ops mailing list > v6ops@ietf.org > https://www.ietf.org/mailman/listinfo/v6ops
- [v6ops] PMTUD issue discussion Fred Baker (fred)
- Re: [v6ops] PMTUD issue discussion Joe Touch
- Re: [v6ops] PMTUD issue discussion Templin, Fred L
- Re: [v6ops] PMTUD issue discussion joel jaeggli
- Re: [v6ops] PMTUD issue discussion Andrew 👽 Yourtchenko
- Re: [v6ops] PMTUD issue discussion Templin, Fred L
- Re: [v6ops] PMTUD issue discussion Fred Baker (fred)
- Re: [v6ops] PMTUD issue discussion Fernando Gont
- Re: [v6ops] PMTUD issue discussion Templin, Fred L
- Re: [v6ops] PMTUD issue discussion Fernando Gont
- Re: [v6ops] PMTUD issue discussion Templin, Fred L
- Re: [v6ops] PMTUD issue discussion Andrew 👽 Yourtchenko
- Re: [v6ops] PMTUD issue discussion Fernando Gont
- Re: [v6ops] PMTUD issue discussion Templin, Fred L
- Re: [v6ops] PMTUD issue discussion Ray Hunter
- Re: [v6ops] PMTUD issue discussion Matthew Petach
- Re: [v6ops] PMTUD issue discussion Ray Hunter
- Re: [v6ops] PMTUD issue discussion joel jaeggli
- Re: [v6ops] PMTUD issue discussion joel jaeggli
- Re: [v6ops] PMTUD issue discussion Tom Perrine
- Re: [v6ops] PMTUD issue discussion Tom Perrine
- Re: [v6ops] PMTUD issue discussion Joe Touch
- Re: [v6ops] PMTUD issue discussion Fred Baker (fred)
- Re: [v6ops] PMTUD issue discussion Jared Mauch
- Re: [v6ops] PMTUD issue discussion joel jaeggli
- Re: [v6ops] PMTUD issue discussion Brian E Carpenter
- Re: [v6ops] PMTUD issue discussion Fernando Gont
- Re: [v6ops] PMTUD issue discussion Fred Baker (fred)
- Re: [v6ops] PMTUD issue discussion Jared Mauch
- Re: [v6ops] PMTUD issue discussion Fernando Gont
- Re: [v6ops] PMTUD issue discussion joel jaeggli
- Re: [v6ops] PMTUD issue discussion Fred Baker (fred)
- Re: [v6ops] PMTUD issue discussion Fernando Gont
- Re: [v6ops] PMTUD issue discussion Ray Hunter
- Re: [v6ops] PMTUD issue discussion Joe Touch
- Re: [v6ops] PMTUD issue discussion Templin, Fred L
- Re: [v6ops] PMTUD issue discussion Owen DeLong
- Re: [v6ops] PMTUD issue discussion Joe Touch
- Re: [v6ops] PMTUD issue discussion Owen DeLong
- Re: [v6ops] PMTUD issue discussion Brian E Carpenter
- Re: [v6ops] PMTUD issue discussion Templin, Fred L
- Re: [v6ops] PMTUD issue discussion Brian E Carpenter
- Re: [v6ops] PMTUD issue discussion Templin, Fred L
- Re: [v6ops] PMTUD issue discussion Mikael Abrahamsson
- Re: [v6ops] PMTUD issue discussion Templin, Fred L
- Re: [v6ops] PMTUD issue discussion Mikael Abrahamsson
- Re: [v6ops] PMTUD issue discussion Templin, Fred L
- Re: [v6ops] PMTUD issue discussion Mark Andrews
- Re: [v6ops] PMTUD issue discussion Templin, Fred L