This function allows you to back up your primary connection in case it goes down. For example, when the primary connection fails, the router tries to use the backup with lover priority and if this one is unavailable or fails too, then the router tries the backup with even lower priority. | This function allows you to back up your primary connection in case it goes down. For example, when the primary connection fails, the router tries to use the backup with lover priority and if this one is unavailable or fails too, then the router tries the backup with even lower priority. |