Hi, disabling highdma with ethtool seems to work around the issue. I've
added following udev rule to make the changes permanent in
/etc/udev/rules.d/80-tg3-fix.rules
ACTION=="add", SUBSYSTEM=="net", ATTRS{vendor}=="0x14e4",
ATTRS{device}=="0x1687", RUN+="/sbin/ethtool -K %k highdma off"
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https://bugs.launchpad.net/bugs/1447664
Title:
14e4:1687 broadcom tg3 network driver disconnects under high load
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