/ip firewall mangle
add action=mark-connection chain=input  disabled=no in-interface=pppoe-out1 new-connection-mark=pppoe-out1-conn \
    passthrough=yes
add action=mark-connection chain=input  disabled=no in-interface=pppoe-out2 new-connection-mark=pppoe-out2-conn \
    passthrough=yes
add action=mark-routing chain=output  connection-mark=pppoe-out1-conn disabled=no new-routing-mark=to-pppoe-out1 \
    passthrough=yes
add action=mark-routing chain=output  connection-mark=pppoe-out2-conn disabled=no new-routing-mark=to-pppoe-out2 \
    passthrough=yes
add action=accept chain=prerouting  disabled=no dst-address-type=local in-interface=lan
add action=accept chain=prerouting  disabled=no dst-address-type=local in-interface=lan
add action=mark-connection chain=prerouting  disabled=no dst-address-type=!local in-interface=lan new-connection-mark=\
    pppoe-out1-conn passthrough=yes per-connection-classifier=src-address-and-port:2/0
add action=mark-connection chain=prerouting  disabled=no dst-address-type=!local in-interface=lan new-connection-mark=\
    pppoe-out2-conn passthrough=yes per-connection-classifier=src-address-and-port:2/1
add action=mark-routing chain=prerouting  connection-mark=pppoe-out1-conn disabled=no in-interface=lan \
    new-routing-mark=to-pppoe-out1 passthrough=yes
add action=mark-routing chain=prerouting  connection-mark=pppoe-out2-conn disabled=no in-interface=lan \
    new-routing-mark=to-pppoe-out2 passthrough=yes

/ ip route
add dst-address=0.0.0.0/0 gateway=pppoe-out1 routing-mark=to-pppoe-out1 check-gateway=ping
add dst-address=0.0.0.0/0 gateway=pppoe-out2 routing-mark=to-pppoe-out2 check-gateway=ping
add dst-address=0.0.0.0/0 gateway=pppoe-out1 distance=1 check-gateway=ping
add dst-address=0.0.0.0/0 gateway=pppoe-out2 distance=2 check-gateway=ping

/ip firewall nat
add action=masquerade chain=srcnat  disabled=no out-interface=pppoe-out1
add action=masquerade chain=srcnat  disabled=no out-interface=pppoe-out2