> Can anybody help me with this? So you basically have
PC <-- untagged VID5 --> Switch <-- tagged VID5 --> Server (eth0) with packets of PC not being tagged before being delivered to the server. I've verified that tcpdump with the above options shows the 802.1q header for me in a similar setup. So this looks like switch misbehaviour / misconfiguration. I've also been told by linux admins that vlan offloading to the nic could cause things like this if drivers are broken. Regards, M. Braun
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