107. Mikrotik Load Balancing(ECMP Method) 2 WANs(Static IP)

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Script:

/ip address
add address=192.168.168.1/24 interface=bridge-LAN network=192.168.168.0
add address=103.28.0.254/30 interface=WAN2 network=103.28.0.252
add address=103.28.2.254/30 interface=WAN1 network=103.28.2.252

/ip dns
set  servers=8.8.8.8,8.8.4.4

/ip firewall nat
add action=masquerade chain=srcnat out-interface=WAN1
add action=masquerade chain=srcnat out-interface=WAN2

/ip route
add check-gateway=ping distance=1 gateway=103.28.0.253,103.28.2.253

Ref: http://wiki.mikrotik.com/wiki/ECMP_load_balancing_with_masquerade


Other Config

/ip firewall nat
add action=masquerade chain=srcnat out-interface=WAN1
add action=masquerade chain=srcnat out-interface=WAN2

/ip firewall mangle
add action=mark-connection chain=input in-interface=WAN1 new-connection-mark=\
    WAN1_Conn passthrough=yes
add action=mark-connection chain=input in-interface=WAN2 new-connection-mark=\
    WAN2_Conn passthrough=yes
add action=mark-routing chain=output connection-mark=WAN1_Conn \
    new-routing-mark=WAN1_Conn passthrough=no
add action=mark-routing chain=output connection-mark=WAN2_Conn \
    new-routing-mark=WAN2_Conn passthrough=no

/ip route
add distance=1 gateway=103.28.2.253 routing-mark=WAN1_Conn
add distance=1 gateway=103.28.0.253 routing-mark=WAN2_Conn
add check-gateway=ping distance=1 gateway=103.28.0.253,103.28.2.253