/ip firewall mangle
add action=mark-routing chain=prerouting comment=MEGA_1 new-routing-mark=\
to_MEGA passthrough=no src-address=
10.1.21.0/24add action=mark-routing chain=prerouting comment=MEGA_2 new-routing-mark=\
to_MEGA_2 passthrough=no src-address=
10.1.22.0/24 /ip route
add check-gateway=ping distance=1 gateway="Mega PPPoE_2" routing-mark=to_MEGA_2
add check-gateway=ping distance=1 gateway="Mega PPPoE" routing-mark=to_MEGA
add check-gateway=ping distance=1 gateway="Mega PPPoE"
add check-gateway=ping distance=2 gateway="Mega PPPoE_2"