Linux Managing multiple Network interfaces

If you have multiple network interfaces on your machine e.g. a wireless (check using iwconfig) and wired. i.e. eth0 and eth1. Linux will end up using the first one it finds. In order to use the interface of your choice, you can disable one or the other.

ifconfig eth1 down and force the other to take over using the pump command.

# pump -i eth0 --status
Check the status / get details of dhcp on eth0

# pump -i eth0 --release
Release dhcp IP on eth0

# pump -i eth0
Request a dhcp ip for eth0