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Date:      Tue, 07 Sep 2021 08:18:34 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 258334] 802.1ad ethertype lost
Message-ID:  <bug-258334-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D258334

            Bug ID: 258334
           Summary: 802.1ad ethertype lost
           Product: Base System
           Version: 13.0-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: donner@FreeBSD.org

During input processing of received frames, the commit
c7cffd65c5d858425e90b847d2e8e583e3b13bf7 (D26436) introduced a generalized
processing von 802.1q and 802.1ad frames by replacing the VLAN header by mb=
uf
meta data.

Unfortunately the ethertype of the original frame is lost. So if the frame =
is
processed by other kernel routines later (i.e. netgraph), 802.1ad frames wi=
ll
be indistinguishable from 802.1q frames.

In my case this breaks further processing.

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