Not equal cost multipath routing

RouterOS General
1

I have two gateways machine, connected to different ISP’s. One link is charged per traffic, another is flat rate, so the cost per link is not the same. I want to fill up cheaper link first, then if there is more traffic to use another link as well. Of course, I want to have failover also. I tried to search on this topic, but I couldn’t find any answer to this.

/sbin/ip route add default scope global nexthop via 10.0.0.138 dev eth2 weight 2 nexthop via 10.0.1.138 dev eth1 weight 1

Linux has weight parameter for multipath routing, but I am not sure how to do this with Mikrotik. ECMP is really very easy to do, but this not equal cost situation seems to be more difficult.

2

You can “configure” weights but mentioning one gateway several times in the route statement, so like

gateway=10.0.1.1,10.2.3.4,10.2.3.4

giving double weight to 10.2.3.4 than 10.0.1.1.

Best regards,
Christian Meis

3

OK, I’ll try this. I thought this option (putting one gateway several times) is just for load balancing links with different bandwidth.

4

Maybe you can use mangle and action=mark-routing and then assign specific traffic to the gateways.

Consider this option too.