2.2.6 broken RE driver
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I started noticing our NIC flapping, here what was in the dmesg.
re1: watchdog timeout re1: link state changed to DOWN re1: link state changed to UP re1: watchdog timeout re1: link state changed to DOWN re1: link state changed to UP
This is only happening on 2.2.6 if i downgrade(Reinstall) to 2.2.5 it works fine. I guess the freebsd version from 10.1-p24 to 10.1.p25 broke something, here are the tickets on it.
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=166724
https://forums.freebsd.org/threads/55306/I have not tried any of the workarounds yet.
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Also this only seems to happen under high load.
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That didn't change between 2.2.5 and 2.2.6, there are no driver changes between those. The linked FreeBSD bug dates back 4 years. Your best bet, outside of getting better quality hardware, is trying 2.3 since Pyun noted there were improvements in FreeBSD 10.2.