Trunk with VLAN1


New Member
Aug 31, 2023

I have a PVE host with a network trunk to it, that is causing me issues with VMs running on VLAN1.
I know running things on VLAN1 is not ideal, but there are some legacy items that cant be moved right now - long story.

The rest of the VLANs are working just fine, and the VMs there can communicate across VLANs and such - but just not the VMs running on VLAN1.
This is the interfaces config:
root@dk1pve02:~# cat /etc/network/interfaces
# network interface settings; autogenerated
# Please do NOT modify this file directly, unless you know what
# you're doing.
# If you want to manage parts of the network configuration manually,
# please utilize the 'source' or 'source-directory' directives to do
# so.
# PVE will preserve these directives, but will NOT read its network
# configuration from sourced files, so do not attempt to move any of
# the PVE managed interfaces into external files!

auto lo
iface lo inet loopback

iface enx7cc2c6464727 inet manual

iface enp3s0 inet manual

auto vmbr0
iface vmbr0 inet static
        bridge-ports enx7cc2c6464727
        bridge-stp off
        bridge-fd 0
        bridge-vlan-aware yes
        bridge-vids 1-4094

auto vmbr0.10
iface vmbr0.10 inet static

iface wlp4s0 inet manual

I tried with both VLAN1 tagged and untagged on the VMs, but that didnt really change anything.

What am i doing wrong? :)
Switched to OVS and now its working.
Ended up with this config, which seems to be working.

auto lo
iface lo inet loopback

auto enx7cc2c6464727
iface enx7cc2c6464727 inet manual
        ovs_type OVSPort
        ovs_bridge vmbr0

iface enp3s0 inet manual

auto vlan10
iface vlan10 inet static
        ovs_type OVSIntPort
        ovs_bridge vmbr0
        ovs_options tag=10

auto vmbr0
iface vmbr0 inet manual
        ovs_type OVSBridge
        ovs_ports enx7cc2c6464727 vlan10

iface wlp4s0 inet manual


The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get yours easily in our online shop.

Buy now!