Hi, I had the issue of em(4) Intel I210 traffic just suddenly stopping, for the 2x onboard I210:s on my Asrock motherboard, https://marc.info/?l=openbsd-misc&m=149015435413434&w=2 , on AMD64 6.0 MP.
Juuso seems to have had the same or at least a similar problem with the Intel I210, he debugged it a bit further than me, https://marc.info/?l=openbsd-misc&m=145696725605233&w=2 . I checked EM's sources (if_em* in https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sys/dev/pci/ ) and it looks to me like there has been no change last 14 months. To contribute to debug further, when I experience malfunctioning or a stop of traffic, can I run any particular commands and send you the output, or can I switch on any particular kernel defines, to help debug this one further? This is my fix-bugs reflex. Maybe more likely I'll just go buy some PCI NIC that is known to be reliable. The same machine works excellent with USB2 RTL8153 NIC:s. Tinker
