Thanks ! i didn’t tought it was working like this.
If i’m right, all traffic not catched by a balancing rule goes directly to the balancer gateways (Auto routing), but it is possible to send some traffic to a selected gateway by a specific rule.
Then, if the gateway is not up, the traffic goes to the automaticaly selected gateway from the balacing group.
This is not easy to understand and This is easy to do for two wans but is a bit limiting for a multiwan setup, where it is simpler to define a balancing group for each user group.
Next, it is not possible with this setup to have a failover balance for a users group, and load balancing for another group.