You can try this, simpler and simplest:
Simpler Failover for two Gateways I found working
Simpler Failover for two Gateways I found working - #19 by jaclaz
You can try this, simpler and simplest:
Simpler Failover for two Gateways I found working
Simpler Failover for two Gateways I found working - #19 by jaclaz