[Bug 221122] Attaching interface to a bridge stops all traffic on uplink NIC for few seconds

From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 08 Dec 2021 04:18:25 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221122

--- Comment #21 from Alexander Motin <mav@FreeBSD.org> ---
Mason,  I don't see how this can be fixed without either significantly
complicating the bridge driver to handle TSO/LRO/etc offload in software, or
without making Intel drivers somehow avoid chip reset on interface capability
changes (if that is even possible).

In TrueNAS we've workarounded this problem by adding UI checkbox to
preemptively disable interface offload on boot.  Done earlier it allows to
avoid the interface flap later.

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