I am trying to solve this problem for two days now, but still can't make it work.
I have two Proxmox 7 nodes in a Cluster (node1 and node2)
node1 has OPNSense installed
vmbr0 is LAN and vmbr1 is WAN
/etc/network/interfaces
auto lo
iface lo inet loopback
iface eno1 inet manual
iface eno2...