One of the first things I do when I set up a Proxmox server is configure the network interfaces. I’m usually attaching the network interface on my pve to a trunk port on a managed switch. I want my management interface on a particular vlan, and I want to be able to tag the traffic on my guest interfaces so there is no vlan configuration at the guest level. Here’s how I do it.
Yours will likely look a bit different, this is how I configure Dell R720s I’m usually working with.
auto lo iface lo inet loopback iface eno1 inet manual iface eno2 inet manual iface eno3 inet manual iface eno4 inet manual auto vmbr0 iface vmbr0 inet manual bridge-ports eno1 bridge-stp off bridge-fd 0 bridge-vlan-aware yes bridge-vids 2-4094 bridge-pvid 1 auto vmbr0.2 iface vmbr0.2 inet static address 192.168.2.2/24 gateway 192.168.2.1 vlan-raw-device vmbr0