Proxmox / OPNsense

[MajorPayneDOF]

My Primary Router (Bare metal) is crashing, and I need to figure out what is causing it. I decided to create a backup router (using 2 of Home Network Guy's Opnsense guides); the backup device's WAN was connected to my local existing network as I worked on it. It runs Proxmox with an Opnsense VM and is set up shutdown/startup priority 1. I want to be able to make this change seamlessly.

What to know for the next part.
Proxmox IP 10.0.1.111
LAN IP 10.0.1.1

The issue I am having is that when I replace the Primary OPNsense device with the Backup, the Backup never pulls the actual WAN IP. Instead, it keeps attaching the 10.0.1.1 IP, which was the Primary's.

Please help me figure out what is going wrong. I can and will provide screenshots

[dseven]

Your description is vague/confusing. Also, you've attached the same screenshot twice - did you have another one that you intended to share?

What do you mean by "it keeps attaching the 10.0.1.1 IP"?

How is the WAN interface configured? (e.g. DHCP client, PPPoE, etc)

How is the LAN interface configured?

How are the interfaces assigned in OPNsense? (e.g. vtnet0 for LAN, vtnet1 for WAN)

How are the VM's virtual NICs configured in Proxmox? (e.g. net0 uses bridge vmbr1, etc)