lb 2 isp

#ip ISP1 = 192.168.0.1
#ip ISP2 = 192.168.1.1

/ip firewall address-list
add address=10.0.0.0/8 list=lokal
add address=172.16.0.0/12 list=lokal
add address=192.168.0.0/16 list=lokal

/ip firewall nat
add action=masquerade chain=srcnat comment=masquerade out-interface=ISP1
add action=masquerade chain=srcnat comment=masquerade out-interface=ISP2

/ip route
add check-gateway=ping comment=default distance=1 gateway=192.168.0.1
add check-gateway=ping comment=backup distance=2 gateway=192.168.1.1
add check-gateway=ping comment=out-1 distance=1 gateway=192.168.0.1 routing-mark=out-1
add check-gateway=ping comment=out-2 distance=1 gateway=192.168.1.1 routing-mark=out-2
add check-gateway=ping comment=modem-1 distance=1 gateway=192.168.0.1 routing-mark=modem-1
add check-gateway=ping comment=modem-1 distance=2 gateway=192.168.1.1 routing-mark=modem-1
add check-gateway=ping comment=modem-2 distance=1 gateway=192.168.1.1 routing-mark=modem-2
add check-gateway=ping comment=modem-2 distance=2 gateway=192.168.0.1 routing-mark=modem-2


/ip firewall mangle
add action=mark-connection chain=input comment=out-1 in-interface=ISP1 new-connection-mark=out-1 passthrough=yes
add action=mark-connection chain=input comment=out-2 in-interface=ISP2 new-connection-mark=out-2 passthrough=yes
add action=mark-routing chain=output comment=out-1 connection-mark=out-1 new-routing-mark=out-1 passthrough=no
add action=mark-routing chain=output comment=out-2 connection-mark=out-2 new-routing-mark=out-2 passthrough=no
add action=mark-routing chain=prerouting comment=modem-1 dst-address-list=!lokal dst-address-type=!local new-routing-mark=modem-1 passthrough=no per-connection-classifier=both-addresses-and-ports:2/0
add action=mark-routing chain=prerouting comment=modem-2 dst-address-list=!lokal dst-address-type=!local new-routing-mark=modem-2 passthrough=no per-connection-classifier=both-addresses-and-ports:2/1