LXC cannot get an IP if VLAN ID is set.

[Buckeyes1995]

I've got an LXC container I want to put on VLAN 40. With the VLAN tag set, I cannot get an IP from OPNsense. If I remove the VLAN tag, I get a LAN IP. The only thing I did in Proxmox was made the host VLAN aware and set the VLAN tag in the LXC via the GUI.

The path from LXC to OPNsense (DHCP server) is as follows:

LXC -> Cisco Switch -> TP Link Switch -> OPNsense (lagg).

• The Proxmox host is VLAN aware. The LXC is set to tag VLAN 40: https://imgur.com/JEa1lfs
• The CISCO switch has a VLAN 40 set up and passing tagged traffic: https://imgur.com/q7juRP7
• The TP Link Switch has a VLAN 40 set up and passing tagged traffic from port 13 (connection to CISCO switch) to the lagg (ports 9 and 10) interface: https://imgur.com/hpXw7e2

Anyone know what I'm doing wrong? Several months ago I was able to get a VLAN DHCP address; but I've reinstalled Proxmox after getting back to it, and now I can't.. I don't see anything obviously wrong.

Thanks.