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Re: [v6ops] PMTUD issue discussion

Fernando Gont <fgont@si6networks.com> Fri, 05 September 2014 02:06 UTC

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Date: Thu, 04 Sep 2014 22:50:52 -0300
From: Fernando Gont <fgont@si6networks.com>
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To: "Fred Baker (fred)" <fred@cisco.com>
References: <0D370E74-688B-4EB3-A691-309A03AF20BA@cisco.com> <53FBA174.2040302@isi.edu> <53FBA6E1.90905@bogus.com> <CAPi140PMeM9omtm11+NHa2ywUfof_tE7HknKExtoEb32mm7L_w@mail.gmail.com> <71D0D5E8-80E9-430B-8ED4-16C1F99082CC@cisco.com> <54020ECC.4000000@globis.net> <CAEmG1=redpYUnv9R-uf+cJ4e+iPCf6zMHzVxeKNMGjcC=BjR+Q@mail.gmail.com> <5402C26A.8060304@globis.net> <540626F6.1020103@scea.com> <60533790-9A16-44C8-8239-89AE2C6BD783@cisco.com> <5408F6C6.3030103@gont.com.ar> <080303C1-D09F-4987-B114-F0F5C8B44863@cisco.com> <5409080E.7000200@si6networks.com> <9F0F552B-B465-40C4-8206-82A289294787@cisco.com>
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Subject: Re: [v6ops] PMTUD issue discussion
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On 09/04/2014 09:58 PM, Fred Baker (fred) wrote:
>>> 802.15.4?
>> 
>> No. I seem to recall that it was more of a packet radio sort of
>> thing (something predating 802.15.4). I could ask some folks if
>> interested in more details…
> 
> I think you missed my point. We have a case in point today, which is
> IPv6 in an IPv6 tunnel encapsulation running on a packet network
> whose MTU is 127 bytes. We call it “6lowpan”, and it runs on IEEE
> 802.15.4.

I expected 6lowpan to offer a virtual MTU >= 1280 (don't they), but
older stuff to not take care of that -- hence my comment.

-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492

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