[Bug 270559] if_bridge: does not forward packets properly for vlan 1

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 10 Apr 2023 09:03:40 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270559

--- Comment #10 from Zhenlei Huang <zlei@FreeBSD.org> ---
(In reply to Philip Paeps from comment #8)
> Did either of you test what happens if a packet with a dot1q header that only
> contains a PCP and not a VID gets forwarded?

Before that I did some basic PCP tests on re(4), cxgbe(4) and epair(4). Found a
bug with epair(4). I'll post it separately.

If you meant `ifconfig bridge pcp 3 or ping -C3 xxx`, then it does (and should)
work w/wo the patch in #6.

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