Promiscuous interface on vmbr bridge


New Member
Oct 7, 2023

I’m looking at running a ntop setup in an Ubuntu server 22.04 VM. One of the Ethernet ports on the Proxmox host is connected to a mirror port on a physical switch. All of the traffic on the mirror port is visible via tcpdump on the Proxmox base system if I watch the physical interface.

However, in the VM with a listener interface connected to the bridge, I only see multicast/broadcast traffic, even if the listener interface is in promiscuous mode. If I run tcpdump on the Proxmox host on the tap interface, I only see multicast/broadcast traffic as well.

Is there a way to set this up so that the tap interface (and thus the VM) sees absolutely everything on the bridge?

Many thanks

i decided instead to try to get PCI pass thru working on my base system (again). This time, I managed to get it working but curious if there’s a way to actually get a promiscuous listener on a virtual bridge?


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