On 25-jul-2005, at 12:02, Ryota Hirose wrote:
In my personal view, having devices on shared media with different
MTU's is
just a bad idea.
I think so, but in a real world, such bad ideas are often accepted.
:-)
Thinking a bit more about this: ethernet rules the world right now,
and I see few competitors on the horizon. Although an ethernet switch
detects attachment to a port and even negotiates a few capabilities,
there is no mechanism to furter distribute the information learned
that way (if any), so the only way to be certain that all systems
connected to an ethernet use the same MTU is by observing the 30 year
old 1500 byte maximum, or by having an administrator police the MTU
of all attached devices. In other words: the current situation, where
jumboframe deployment is negligible.
I think we have to turn this around and acknowledge that having a
fixed MTU on any network (whatever the layer) stifles progress so we
should embrace MTU diversity.
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