Test your connectivity for World IPv6 Day

Gert Doering gert at space.net
Tue Jun 7 13:59:36 CEST 2011


On Tue, Jun 07, 2011 at 01:55:35PM +0200, Rémi Després wrote:
> As detailed in my last answer to Fred, 1280 seems the best choice, at least in IPv6. 
> Can we agree on this?

I'm not agreeing.  Crippling the protocol by restricting ourselves to use
the least common denominator all the time, except only in those case where
full packet sizes are not working (there might even be 9000-clear paths)
is not the way *forward*.

We need to assume a working internet and fix the remaining breakage, instead
of assuming a broken everything and shying away from doing anything that 
might not work for 0.001% of the cases - number made up ad-hoc, but I'm
sitting behind a less-than-1500 DSL line, and I hardly ever see PMTU
problems so far.  There were bugs in some OSes and some virtualization
solutions, but they got *fixed* - and how did they get fixed?  By using
larger MTUs, noticing that it breaks, and resolving the root cause!

Gert Doering
        -- NetMaster
did you enable IPv6 on something today...?

SpaceNet AG                        Vorstand: Sebastian v. Bomhard
Joseph-Dollinger-Bogen 14          Aufsichtsratsvors.: A. Grundner-Culemann
D-80807 Muenchen                   HRB: 136055 (AG Muenchen)
Tel: +49 (89) 32356-444            USt-IdNr.: DE813185279

More information about the ipv6-ops mailing list