Thank you for the response. I understand the dependency.
My concern is that in the routing table, the Network "ppp" for target "0.0.0.0/0" does not have a gateway (as shown below). I was hoping to specify the gateway.
Network Target IP gateway Metric
ppp 0.0.0.0/0 0.0.0.0 1
ppp 10.x.x.x 0.0.0.0 1
lan 10.x.x.x./28 0.0.0.0 0