To enable all physical interfaces on Solaris:
# ifconfig -a plumb
# dladm show-dev nge0 link: up speed: 100 Mbps duplex: full nge1 link: up speed: 100 Mbps duplex: full e1000g0 link: up speed: 1000 Mbps duplex: full e1000g1 link: up speed: 1000 Mbps duplex: full