Sun Microsystems Enterprise 250 Owner's Manual page 195

7. Reboot the system; enter:
zardoz # reboot -- -r
This command rebuilds the device trees so that the system will recognize the newly
installed PCI Ethernet adapter card.
What Next
After completing this procedure, the Ethernet interface is ready for operation.
However, in order for other network devices to communicate with the system
through this interface, the interface information (its IP address and host name) must
be entered into the namespace on the network name server. For information about
setting up a network name service, consult the Solaris System Administrator
AnswerBook for your specific Solaris release.
Chapter 9 Administration and Networking 177