The Natural Philosopher  writes:
> On 13/06/2020 18:09, Richard Kettlewell wrote:
>> The silence from this point is hard to explain. In the absence of an
>> acknowledgement from .118, .18 should be retransmitting, and when it
>> gives up (as the RST below suggests it has) that should provoke some
>> kind traffic. And it’s certainly surprising not to see the final RST
>> shown below.
>>
>> My current guess is that something has gone wrong in .18’s kernel
>> network stack, possibly related to the the packet size. Since I’m not up
>> for debugging the Linux IP stack, the only way I have to test this
>> theory would be to upgrade .18 to buster and see if gets better
>> (essentially: if there’s a bug that was fixed between the stretch and
>> buster kernels). I appreciate that this is “perturb the problem and see
>> if it goes away” but I don’t have a better suggestion at this point.
>
> I think its hardware.

Since there’s eight Pis knocking around on this network it should be
straightforward to test that theory, i.e. by putting the SD card into a
different Pi and seeing if the behavior changes.

--
https://www.greenend.org.uk/rjk/

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