MikroTik RouterOS 5.6
/ip address
add address=192.168.1.1/24 disabled=no interface=LAN network=192.168.1.0
add address=192.168.2.200/25 disabled=no interface=ISP1 network=192.168.2.2
add address=192.168.0.200/24 disabled=no interface=ISP2 network=192.168.0.0
/ip firewall mangle
add action=mark-routing chain=prerouting comment=Grupo_A disabled=no \
new-routing-mark=Grupo_A passthrough=no src-address=192.168.1.0/25
add action=mark-routing chain=prerouting comment=Grupo_A disabled=no \
new-routing-mark=Grupo_B passthrough=no src-address=192.168.1.128/25
/ip route
add check-gateway=ping disabled=no distance=1 dst-address=0.0.0.0/0 gateway=\
10.111.0.1 routing-mark=Grupo_A scope=30 target-scope=10
add disabled=no distance=1 dst-address=0.0.0.0/0 gateway=192.168.1.1 \
routing-mark=Grupo_B scope=30 target-scope=10
/ip firewall nat
add action=masquerade chain=srcnat disabled=no src-address=192.168.1.0/24
/ip route
add disabled=no distance=1 dst-address=0.0.0.0/0 gateway=192.168.0.1 \
routing-mark=Grupo_A scope=30 target-scope=10
add disabled=no distance=1 dst-address=0.0.0.0/0 gateway=192.168.2.1 \
routing-mark=Grupo_B scope=30 target-scope=10