[Bug 217606] Bridge stops working after some days

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

--- Comment #22 from Kristof Provost <kp at freebsd.org> ---
(In reply to punkt.de Hosting Team from comment #21)
That should tell us if the problem is specific to the ix cards, or not. If it's
not it's most likely a bridge issue.

It might be worth taking a look at what happens in the bridge code once it's in
that state:

sudo dtrace -n fbt:if_bridge::

That looks like this, on my nearly idle bridge:
dtrace: description 'fbt:if_bridge::' matched 108 probes
CPU     ID                    FUNCTION:NAME
  6  63915            bridge_transmit:entry
  6  63814           bridge_broadcast:entry
  6  63824             bridge_enqueue:entry
  6  63825            bridge_enqueue:return
  6  63824             bridge_enqueue:entry
  6  63825            bridge_enqueue:return
  6  63815          bridge_broadcast:return
  6  63916           bridge_transmit:return
  3  63915            bridge_transmit:entry
...

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