Date: Sun, 1 Aug 2021 01:51:58 +0200 From: Peter <pmc@citylink.dinoex.sub.org> To: freebsd-hackers@freebsd.org Subject: TAP device deletes VLAN tag? (netgraph related) Message-ID: <YQXiHsrUYfN3wgXT@gate.intra.daemon.contact>
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Sending here since "stable" still doesn't work...
Hi all,
I found a problem when connecting tap devices.
In the most straightforward way I would do
# ngctl connect tap1: fxp0: lower lower
Then doing tcpdump on both netifs, the originating (in my case tap0)
has the VLAN tag, and the receiving doesn't show it anymore.
The same happens when attaching a tap device to a ng_bridge or ng_hub:
the tap device (and the bhyve behind it) will not see the VLAN tags
arriving from elsewhere on the bridge.
The tap device itself seems to support vlan tags. So the problem
appears to be most likely related to the netgraph hook of the tap
device (the lower, in my case).
This is Rel. 12.2 running. Is this a known problem? Is there a patch
or workaround known?
rgds,
PMc
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