Automatic Failover with Mikrotk

Configuring automatic failover with Mikrotik routers can be very easy and straightforward, yet most administrators find it difficult.
This is because with Mikrotik, what most people configure is actually not automatic failover. They configure two gateways with different administrative distances and they set the gateway check to ping. With this, the link will NEVER fail over unless the cable is physically disconnected.
To set up a complete automatic failover that does not require you to unplug the cable, do the following:
On Client Router, configure your two WAN interfaces to connect to your ISPs using the IP addresses given to you by your providers. For the automatic failover, do this:

/ip route
add dst-address=4.2.2.3 gateway=10.10.1.1 scope=10
add dst-address=8.8.8.8 gateway=100.50.1.1 scope=10

add distance=1 gateway=4.2.2.3 check-gateway=ping
add distance=2 gateway=8.8.8.8 check-gateway=ping

This is all you need for a full automatic failover that works. Forget the long notes that people write concerning this topic. It is that simple. I have a video on this coming soon. Watch on for it.
NOTE: the two addresses (4.2.2.3 and 8.8.8.8) are the two addresses we are pinging, one for each of the WAN interfaces. Once any of the addresses becomes unreachable, the router considers that link down and fails over to the other link. Once the primary comes back, it takes over from the secondary link.
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Timigate

Ashioma Michael, a BSc (Computer Science)., MTCNA, CCNA, and CCNP holder with many years of industry-proven experience in network design, implementation and optimization. He has tutored and guided many professionals towards obtaining their Cisco certifications. Mike works as a senior network engineer with one of the leading internet service providers in West Africa.

2 thoughts on “Automatic Failover with Mikrotk

    • January 14, 2016 at 4:56 pm
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      Works well,except for the NAT that you have configured on one of your WAN interfaces.Remove the nat on the WAN interface and only specify your LAN IPs for natting.

      Reply

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