Here is a simple formula that worked to produce a static IP address which is under certain circumstances desirable. I make no claim that this is the best say, I only claim this worked. The method shown here uses standard network management.
Start with a DHCP configuration and capture the output of commands "ifconfig" and "route." Then capture the current values in in /etc/resolve.conf. Use those values to configure the following network configuration dialogs. Use "ifconfig" to show a current working IP address and mask. Use the addresses in resolv.conf for the DNS name refers. Use the output of the "route" command to see the default IP gateway.