/ip route
add dst-address=77.88.8.1 gateway=pppoe-out1 scope=10
add dst-address=77.88.8.2 gateway=pppoe-out2 scope=10
/ip route
add dst-address=1.1.1.1 gateway=77.88.8.1 check-gateway=ping distance=1
add dst-address=1.1.1.1 gateway=77.88.8.2 check-gateway=ping distance=2