How to handle two different ISPs, one with IPv6 and one with IPv4 for failover or/and load balance

[jaclaz]

In case of need, a simple way to make (IPv4) recursive routes:

Simple recursive failover for bears of little brain

Recursive routing and failover setup making use of it is one among the many commonly needed features of a router that is - BTW like most useful things possible in RouterOS - either mis-documented or documented in such a complex and convolute way that bears of little brain like myself simply cannot grasp in their entirety. By applying a (rest assured moderate) amount of torture to knowledgeable member CGGXANNX (whom I want to thank for the patience and the will to discuss and explain the matter)…

Alternatively, the simplest way using netwatch:

Simpler Failover for two Gateways I found working

Only to keep things as together as possible I just “sold” this Filo’s approach to a new user, with a few changes. I got rid of the separate routing table and of the mangle by adding a “narrow” /32 route to the “canary” ip address in “main” table. And I didn’t use the “comment” as selector in the Netwatch script (this is a pet peeve of mine, comments may be changed accidentally six months or a year later, the setup would stop working and finding out what happened would be more difficult). Be…