[SOLVED] DHCP on vlan bridge only works after staring container


New Member
Sep 21, 2022
I want the Proxmox management to be available in vlan 102.
The vmbr0 bridge is used by multiple VMs/CTs with different VLANS, which works so far.
What does not work is the vmbr0.102 getting an IP on boot, strangely it works after I start a container, then DHCP works and vmbr0.102 gets its IP assigned. If I define a static IP, it also only works after I start a container.

Except from the interfaces config.
auto enp129s0f0np0
iface enp129s0f0np0 inet manual

auto vmbr0.102
iface vmbr0.102 inet dhcp

auto vmbr0
iface vmbr0 inet manual
        bridge-ports enp129s0f0np0
        bridge-stp off
        bridge-fd 0
        bridge-vlan-aware yes
        bridge-vids 2-512

I would have preferred to create an interface per VLAN, but then the name is 1 character over the limit...
Last edited:
I could resolve the issue by renaming enp129s0f0np0 to eno3 and then set up a dedicated vlan interface instead:
iface eno3 inet manual

iface eno3.101 inet manual

auto vmbr0
iface vmbr0 inet manual
        bridge-ports eno3
        bridge-stp off
        bridge-fd 0

auto vmbr0v101
iface vmbr0v101 inet dhcp
        bridge-ports eno3.101
        bridge-stp off
        bridge-fd 0

iface vmbr0v101 inet6 auto
        accept_ra 2
        up dhclient -1 -6 -cf /etc/dhcp/dhclient6.conf -lf /var/lib/dhcp/dhclient6.vmbr0v101.leases -v vmbr0v101 || true


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!