#Primary ISP Gateway
:global Gateway1 "1"
#Secondary ISB Gateway
:global Gateway2 "2"
#DNS OpenDNS // Change your own hosts
:global Host1 "208.67.222.222" 
:global Host2 "208.67.220.220"
/ip route
add dst-address=0.0.0.0/0 gateway=$Gateway1 distance=1 check-gateway=ping
add dst-address=0.0.0.0/0 gateway=$Gateway2 distance=2

/ip route
add dst-address=$Host1 gateway=$Gateway1 scope=10
add dst-address=$Host2 gateway=$Gateway2 scope=10

/ip route
add distance=1 gateway=$Host1 routing-mark=ISP1 check-gateway=ping
add distance=2 gateway=$Host2 routing-mark=ISP1 check-gateway=ping

/ip route
add distance=1 gateway=$Host1 routing-mark=ISP2 check-gateway=ping
add distance=2 gateway=$Host2 routing-mark=ISP2 check-gateway=ping

/ip route
add dst-address=$Host1 type=blackhole distance=20
add dst-address=$Host2 type=blackhole distance=20