WAN WAN : : : DSL-Provider 1 : DSL-Provider 2 : : .---+--------. .--+--------. | DSL-Router | | DSL-Router | '---+--------' '--+--------'192.168.20.1/24 | | 192.168.20.3/24 +------------+-----------+ | .-----+------. | LAN-Switch | TRANSFER 192.168.20.0/24 (VLAN 100) '-----+------' | +------------+-----------+ | CARP |192.168.20.251/24| 192.168.20.250 | 192.168.20.252/24 .----+------. .--+--------. | OPNsense1 | Firewall HA | OPNsense2 | '----+------' '--+--------' | CARP |192.168.31.251/24| 192.168.31.250 | 192.168.31.252/24 | .------------. | +------| LAN-Switch |----+ '----+-------' | LAN | 192.168.31.0/24 (VLAN 200) |