PPP and Ethernet together in harmony - NOT

My board has both PPP and Ethernet interfaces. When the Ethernet interface is not plugged in (or sometimes even when it is), I'd like the PPP interface to be used. They are on different subnets.

What happens though, is the stack insists on trying to send to the ethernet interface. Debug output is full of these:

ETH ERR: Local IP address: 0.0.0.0

How can I force the stack to send packets out the PPP interface?

Dave

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