Hi peter.arnett,
The correct way to configure DHCP ( Client ) which is what you need is :
ge-0/0/0 {
unit 0 {
family inet {
dhcp-client;
}
}
}
For DHCP Client to work you also have to enable incoming services on the interface and not on the zone level when configuring the security zone :
root# show security zones security-zone test interfaces ge-0/0/0.0
host-inbound-traffic {
system-services {
dhcp;
}
}