On Sun, Jan 25, 2026 at 03:37:51PM +0100, Marco Moock wrote: > I run Virtualbox on Debian with a network bridge to a real ethernet > interface that is a trunk (transports multiple vlans with tags). > > My goal is to bring that trunk into the VM, so one bridge exists to the > trunk interface and the VM will create subinterfaces. Although, the > bridge doesn't detect that those subinterfaces have multiple MAC > addresses and doesn't forward ethernet traffic to them unless I enable > promiscuous mode in the VM (e.g. start sniffing using tcpdump). If I > disable promiscuous mode in the VM, the traffic with dst of the > subinterfaces with different MAC will stop. > > How do I configure that properly, so the bridge behaves like a real > bridge that ust learns which MAC addresses are connected to which port > and don't filter.
Use vboxmanage, like: vboxmanage modifyvm vmname --nic-promisc1=allow-all I believe this is chapter 8 of the VirtualBox user guide. Greg -- web site: http://www.gregn.net gpg public key: http://www.gregn.net/pubkey.asc -- Free domains: http://www.eu.org/ or mail [email protected] _______________________________________________ VBox-users-community mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/vbox-users-community _______________________________________________ Unsubscribe: mailto:[email protected]?subject=unsubscribe
