Date: Sat, 29 Mar 2025 20:28:12 +0100 From: Harry Schmalzbauer <freebsd@omnilan.de> To: net@FreeBSD.org Subject: Rewritten VLAN tag at ng_ether(4) and ng_socket(4) as bhyve(8) netgraph backend Message-ID: <675d8c6c-0c27-4650-bcad-e191c07512b9@omnilan.de>
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Hello, I hope my netgraph (understanding) issue/question fits to net@. My issue: I'm observing VLAN tagged frames reading VID=0 when received inside a bhyve(8) VM, while they (correctly) read VID=77 at ng_eiface(4) ng_bridge(4) members. Narrowed down to be a netgraph(4) problem: Using if_tap(4) as bhyve(8) backend instead of netgraph preserves VLAN tagging (tcpdump inside the otherwise same VM reads VID-77). Blocks use case: Having a VM with a 'trunk' port. If anybody has an idea or is interested in some more details, please have a look at https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285755 Thanks in advance, -harry
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