# LOCALHOST auto lo iface lo inet loopback # INTERFACES iface eth0 inet manual iface eth1 inet manual # PRIMARY BOND auto bond0 iface bond0 inet manual slaves eth0 eth1 bond_miimon 100 bond_mode 4 # SECONDARY BONDS auto bond0.40 iface bond0.40 inet manual vlan-raw-device bond0 auto bond0.10 iface bond0.10 inet manual vlan-raw-device bond0 auto bond0.20 iface bond0.20 inet manual vlan-raw-device bond0 auto bond0.30 iface bond0.30 inet manual vlan-raw-device bond0 # BRIDGES auto vmbr0 iface vmbr0 inet static address 10.4.0.216 netmask 255.255.255.0 gateway 10.4.0.5 bridge_ports bond0.40 bridge_stp off bridge_fd 0 auto vmbr1 iface vmbr1 inet manual bridge_ports bond0.10 bridge_stp off bridge_fd 0 auto vmbr2 iface vmbr2 inet manual bridge_ports bond0.20 bridge_stp off bridge_fd 0 auto vmbr3 iface vmbr3 inet manual bridge_ports bond0.30 bridge_stp off bridge_fd 0 On my Cisco 2950 (WS-C2960-24PC-L) Eth0 plugged into port 21 Eth1 plugged into port 5 interface FastEthernet0/5 description proxmox VM switchport trunk allowed vlan 10,20,30,40 switchport mode trunk spanning-tree portfast interface FastEthernet0/21 description proxmox Management switchport access vlan 40 spanning-tree portfast