Need help to reconfigure network interfaces


New Member
May 24, 2022

I currently have the following network configuration on a proxmox host:

auto lo
iface lo inet loopback

iface eno1 inet manual

iface eno2 inet manual

auto vmbr1
iface vmbr1 inet dhcp
    bridge-ports eno1
    bridge-stp off
    bridge-fd 0
    bridge-pvid 1
#To access port portA on switch (VLAN 100)

auto vmbr2
iface vmbr2 inet manual
    bridge-ports eno2
    bridge-stp off
    bridge-fd 0
    bridge-vlan-aware yes
    bridge-vids 1 100 200 300 400
#To trunk port portB on switch

The proxmox host is accessible (https/ssh) through the IP XXX.XXX.XXX.XXX obtained through vmbr1 configuration, eno1 is connected to a switch's access port (portA) to VLAN 100. As you can see, vmbr2 also provides access to VLAN 100 but through eno2 which is connected to a trunk port of the same switch (portB).

I would like to change the above configuration to free eno2 and obtain the following situation:
  • proxmox host remains accessible through XXX.XXX.XXX.XXX (obtained through DHCP) on eno1
  • vmbr2 uses eno1 instead of eno2
  • eno1 is plugged to switch's portB instead of portA
  • eno2 is unused
  • portA on the switch is unused
How should I change the above configuration to achieve this ? I guess that I should do the following, but I don't want to make a mistake as it is a headless machine...
  • on vmbr1 set "bridge-vlan-aware yes"
  • on vmbr1 set "bridge-pvid 1 100"
  • on vmbr2 set "bridge-ports" to eno1
  • save and reboot
Is that correct ? If not what should I do ?

Thanks in advance for your help!


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