Since you can't FEC IP fragments, the apps have to do it. And since the apps do 
it, they fragment on IP MTU boundaries.

Dino

> On Dec 7, 2021, at 6:54 PM, to...@strayalpha.com wrote:
> 
> I think we’re generally in agreement.
> 
> My view is that fragmentation is currently a necessary evil. Evil that should 
> be avoided where possible, but necessary that MUST be supported.
> 
> Joe
> 
> —
> Joe Touch, temporal epistemologist
> www.strayalpha.com
> 
>> On Dec 7, 2021, at 3:46 PM, Dino Farinacci <farina...@gmail.com> wrote:
>> 
>> Right, I understand this. I said *it could8 use larger headers. So sounds 
>> like we are in agremement. That is, if we can't agree on 1400 because 
>> protocols have been spec'ed for smaller ones, that is where we are headed. 
>> In the opposite direction we wantn to go.
>> 
>> Hence, there is no way to technically fix this. And fragmentation is *not 
>> the solution*. It will cause more packet loss and time-out buffers in 
>> receivers.
>> 
>> But what apps can do, and I know many that do is to send a packet train of 
>> MTU sized packets with FEC. So when there is loss, the receiver can build 
>> the packets via erasure codes.
>> 
>> Dino

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