how to set static IP address in opensolaris

in solaris i knew how to do this. Edit /etc/inet/ipnodes, change /etc/defaultrouter, reboot

in opensolaris there is not defaultrouter file.

first thing I tried was System->admin->network switch to manual enter static address and netmask and gateway.

press 'activate'

"this interface cannot be activated". No error messages given.

Close widget, open again. Now hangs for a minute and then closes

try edit /etc/inet/ipnodes, reboot

eth card not up. Network widget hangs then closes

Works perfectly on DHCP