[Bug 263756] igb interface not receiving vlan packets since 12.3

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 05 May 2022 08:49:24 UTC

--- Comment #2 from sec@42.org ---
In the meantime I found
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260468 which seems match with
my problem.

So from 12.2 to 12.3 hwfiltering seems to have gotten enabled by default &&
can't be disabled anymore.

As a workaround I have created vlan interfaces via
ifconfig $iface.$vlan create

ran that in a loop for all vlans currently in use, and I can see the traffic
again in tcpdump

The change to enable vlan filtering should probably be put somewhat prominently
in the release notes.

Additionally it would be good if the fix from #260468 could be merged to 12.3

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