I have 2 MXs, and internet link and a MG21 cellular gateway. I've configured the internet (WAN1) as the primary link and load balancing is disabled. I still see some traffic on the backup link via the MG21 cellular gateway, more than I was expecting.
Is there anyway to reduce the 'keepalive' traffic on the backup link?
Note: I don't mind increasing failover times (within reason), if I reduce cellular costs.