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Iljitsch van Beijnum wrote:
> On 18 mei 2009, at 23:10, Joe Touch wrote:
> 
>> if we have protocols that won't
>> function when the larger packet gets through, we have a problem. That
>> effectively means the MTU is the smaller number, i.e., that compression
>> may save BW, but cannot support a larger MTU even if it is dominant.
> 
> Not necessarily. PMTUD for tunnels is just an optimization. There is no
> reason why you couldn't take full size inner packets and encapsulate
> them in an outer packet that is then fragmented.

You wouldn't know to do that unless you had a different idea of the MTU
at the endpoint. Or are you suggesting that ROHC do this (I don't think
it would)...

> Now doing that for 100% of the packets isn't great, but doing it for 5%
> of the packets could very well be the right choice.

Sure - but we'd be relying on that.

Joe
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