[Bug 297979] if_bridge(4) floods reserved MACs to all member interfaces
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Date: Sat, 05 Sep 2026 15:39:54 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=297979
Rodney W. Grimes <rgrimes@FreeBSD.org> changed:
What |Removed |Added
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CC| |rgrimes@FreeBSD.org
--- Comment #2 from Rodney W. Grimes <rgrimes@FreeBSD.org> ---
This is a bug, but I dont think the bug is in the "bridge code".
Until the "bridge" in FreeBSD can do proper IGMP multicast member snooping and
filtering by the 802.1 specifications transparent bridges must flood multicast
and broadcast frames out all ports except the receiving port.
The "bug" here is the behavior of what happens when you open a bridge
member interface vs when you open the bridge. IIRC right now these
are treated identically, and that is probably not quiet right, and
it appears that produces this undesired behavior.
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