[Bug 217606] Bridge stops working after some days

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217606

--- Comment #23 from punkt.de Hosting Team <mops at punkt.de> ---
Hey guys,

it hit us again in production. Saturday night, 4am. Sorry - I missed that
DTrace diagnose, but I can add two things at least:

We are using igb(4) interfaces in that machine, not ix(4), so it seems not to
be interface related. Doesn't come as a big surprise to me, because that would
have been a gross layer violation. Again: the host system is communicating just
fine!

I did a `netstat -m` while the bridge was wedged as suggested by gnn. Doesn't
look suspicious at all to me, but then I'm not a kernel developer. Please see
attachment.

What I am going to do now, probably:

Set up an isolated test environment.
Fire up some dozen jails or so.
Generate artificial traffic through the bridge IF. A gigabit sustained
bandwidth ...
Wait for the bug to be triggered.

Need to talk to my colleagues, tomorrow, but this will probably be our course
of action. I can offer ssh access to that isolated system to anyone who
requests it!

Kind regards
Patrick

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