Tue Mar 30, 2021 11:31 pm
It is possible, although quite hard, to synchronize the configuration of those 2 routers using some scripting (so you can configure only router 1 and the config of router 2 will be automatically updated), but it isn't possible to keep the connection tracking state of router 2 synchronized with router 1 (so it could immediately take over when router 1 fails).
This means that on router failure you will lose most connections and they will usually have to be re-established by the client devices.