DHCP settings unavailable and enable VLAN tagging for LAN interface

hermanlf

New Member
Feb 3, 2025
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I have a Proxmox 8.3.0 host with two network interfaces:
vmbr0 is the LAN/management interface
vmbr1 is the WAN interface.

On the Proxmox host I've installed opnsense 25.1 with two virtual nics:
vtnet0 is the WAN interface that is connected to vmbr1
vtnet1 is the LAN interface that is connected to vmbr0
opnsense is accessed via 172.16.2.11 on vtnet1

Two issues:
1 - How do I tag the "default" management subnet with a VLAN ID in opnsense? Is it even possible to do? I'd like to be able to handout an IP based on the VLAN id the switchport is tagged with.
2 - After creating a VLAN in opnsense, the interface does not appear in services for me to setup a DHCP range. Only the "LAN" interface is available for DHCP. I think I'm most likely missing a step. I've been able to do this before but completely forgot.

## My Proxmox Settings ##
Code:
auto lo
iface lo inet loopback

iface enp3s0 inet manual

iface eno1 inet manual

auto vmbr0
iface vmbr0 inet static
        address 172.16.2.11/24
        gateway 172.16.2.1
        bridge-ports enp3s0
        bridge-stp off
        bridge-fd 0
        bridge-vlan-aware yes
        bridge-vids 2-4094
#LAN

auto vmbr1
iface vmbr1 inet manual
        bridge-ports eno1
        bridge-stp off
        bridge-fd 0
#WAN

source /etc/network/interfaces.d/*