IPv6 MTUs smaller than 1280 bytes?

Gert Doering gert at space.net
Mon Sep 13 08:20:15 CEST 2010


On Mon, Sep 13, 2010 at 08:40:12AM +1200, Brian E Carpenter wrote:
> > Technology that cannot do larger MTUs because of the way the technology
> > is specified (imagine ATM without SAR at the VC endpoints) cannot be 
> > fixed without changing standards, upgrading lots of different vendor
> > implementations, etc.
> What's supposed to happen then is that the logical link layer handles
> fragmentation as a link layer (or maybe layer 2.5) function, so that
> the IPv6 layer still sees at least 1280.

Yes - which is, specifically, why I'm asking whether technology is out
there today that has "small MTU" limitations but at the same time does not
provide L2 (L2.5) segmentation and reassembly.

Gert Doering
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