On 2020-07-31, Ivo Chutkin <openbsd@bgone.net> wrote:
> Hello guys,
>
> Thanks for suggestions.
>
> Tweacking sysctl
>
> net.inet.udp.recvspace=131072
> net.inet.udp.sendspace=131072
>
> solved the problem.
>
> Test between routers that started to drop packets over 10Mbit, now run
> test at 100Mbit with less than 1% drops (over 50% before).
net.inet.udp.recvspace and net.inet.udp.sendspace only affect traffic
generated on a machine itself, they do not affect forwarded traffic.
Generating packets on the router itself isn't a good test for how well
they can forward packets.
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