Mikrotik 4 WAN Load Balancing using PCC

/ip address

add address=192.168.11.1/24 network=192.168.0.0 broadcast=192.168.0.255 interface=Lan

add address=192.168.11.2/24 network=192.168.1.0 broadcast=192.168.1.255 interface=PUBLIC1

add address=192.168.12.2/24 network=192.168.2.0 broadcast=192.168.2.255 interface=PUBLIC2

add address=192.168.13.2/24 network=192.168.3.0 broadcast=192.168.3.255 interface=PUBLIC3

add address=192.168.14.2/24 network=192.168.4.0 broadcast=192.168.4.255 interface=PUBLIC4

/ip firewall mangle

add chain=input in-interface=PUBLIC1 action=mark-connection new-connection-mark=PUBLIC1_conn

add chain=input in-interface=PUBLIC2 action=mark-connection new-connection-mark=PUBLIC2_conn

add chain=input in-interface=PUBLIC3 action=mark-connection new-connection-mark=PUBLIC3_conn

add chain=input in-interface=PUBLIC4 action=mark-connection new-connection-mark=PUBLIC4_conn

add chain=output connection-mark=PUBLIC1_conn action=mark-routing new-routing-mark=to_PUBLIC1

add chain=output connection-mark=PUBLIC2_conn action=mark-routing new-routing-mark=to_PUBLIC2

add chain=output connection-mark=PUBLIC3_conn action=mark-routing new-routing-mark=to_PUBLIC3

add chain=output connection-mark=PUBLIC4_conn action=mark-routing new-routing-mark=to_PUBLIC4

add chain=prerouting dst-address=192.168.1.0/24 action=accept in-interface=Lan

add chain=prerouting dst-address=192.168.2.0/24 action=accept in-interface=Lan

add chain=prerouting dst-address=192.168.3.0/24 action=accept in-interface=Lan

add chain=prerouting dst-address=192.168.4.0/24 action=accept in-interface=Lan

add chain=prerouting dst-address-type=!lan in-interface=Lan per-connection-classifier=both-addresses-and-ports:4/0 action=mark-connection new-connection-mark=PUBLIC1_conn passthrough=yes

add chain=prerouting dst-address-type=!lan in-interface=Lan per-connection-classifier=both-addresses-and-ports:4/1 action=mark-connection new-connection-mark=PUBLIC2_conn passthrough=yes

add chain=prerouting dst-address-type=!lan in-interface=Lan per-connection-classifier=both-addresses-and-ports:4/2 action=mark-connection new-connection-mark=PUBLIC3_conn passthrough=yes

add chain=prerouting dst-address-type=!lan in-interface=Lan per-connection-classifier=both-addresses-and-ports:4/3 action=mark-connection new-connection-mark=PUBLIC4_conn passthrough=yes

add chain=prerouting connection-mark=PUBLIC1_conn in-interface=Lan action=mark-routing new-routing-mark=to_PUBLIC1

add chain=prerouting connection-mark=PUBLIC2_conn in-interface=Lan action=mark-routing new-routing-mark=to_PUBLIC2

add chain=prerouting connection-mark=PUBLIC3_conn in-interface=Lan action=mark-routing new-routing-mark=to_PUBLIC3

add chain=prerouting connection-mark=PUBLIC4_conn in-interface=Lan action=mark-routing new-routing-mark=to_PUBLIC4

/ip route

add dst-address=0.0.0.0/0 gateway=192.168.1.1 routing-mark=to_PUBLIC1 check-gateway=ping

add dst-address=0.0.0.0/0 gateway=192.168.2.1 routing-mark=to_PUBLIC2 check-gateway=ping

add dst-address=0.0.0.0/0 gateway=192.168.3.1 routing-mark=to_PUBLIC3 check-gateway=ping

add dst-address=0.0.0.0/0 gateway=192.168.4.1 routing-mark=to_PUBLIC4 check-gateway=ping

add dst-address=0.0.0.0/0 gateway=192.168.1.1 distance=1 check-gateway=ping

add dst-address=0.0.0.0/0 gateway=192.168.2.1 distance=2 check-gateway=ping

add dst-address=0.0.0.0/0 gateway=192.168.3.1 distance=3 check-gateway=ping

add dst-address=0.0.0.0/0 gateway=192.168.4.1 distance=4 check-gateway=ping

/ip firewall nat

add chain=srcnat out-interface=PUBLIC1 action=masquerade

add chain=srcnat out-interface=PUBLIC2 action=masquerade

add chain=srcnat out-interface=PUBLIC3 action=masquerade

add chain=srcnat out-interface=PUBLIC4 action=masquerade