Hi Dan, On Fri, Feb 03, 2023 at 02:57:24PM -0800, Dan Nygren wrote: > Sylvain wrote > ... Anyway, basic rule about using fragmented IP packets: > avoid (to not say > don't). > > Thank you for the advice Sylvain. My design is keeping its packets under > the Ethernet 1500 octet MTU. I had made a diagnostic command to have my > design send back arbitrarily sized messages to prove everything was working > correctly when I ran into the 4385/4386 message size problem.
My best guess is a low level driver bug that happen when packets are sent in a short timeframe, which big UDP packets do due to IP fragmentation taking place. Sending small packets at a low rate does not fix the problem, it just hides it. Sylvain
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