Fail-over WAN Monitoring

RouterOS General
1

Hi there,

I have a question regarding what I would guess would be policy based routing. Our client configurations is as follows.

Client has a primary fibre connection and a secondary fail-over connection. We can currently monitor the client link utilizing PRTG with a basic ping to the public ip. We want to be able to monitor the WAN link as well the problem would be that any ping received via a different WAN link will be routed out over the routers default route being the fibre.

We want to basically get the router to reply out from the same WAN interface as where the traffic is received bearing in mind that the router should still use that WAN link when the primary link goes offline. When using a routing mark to get this done if the primary fails it will still only route the traffic received through that link.

Any help will be appreciated.

Thanks.

2

You need to setup a proper loadbalancing/failover configuration first, which covers this problem.
There are many examples on the forum how to do that.

3

The good one where you can see how to mark incoming connections and outgoing responses is https://wiki.mikrotik.com/wiki/Manual:PCC. Just ignore two rules with per-connection-classifier option, those are for load balancing, which the article is primarily about.