If the Solaris installer did not ask you for network information (IP address, default gateway etc) then it did not detect a network card. If this is the case, please post the output of the "prtconf -pv" command, run as root, so we can see what network card you have. If it did ask you for the IP address etc then using "ifconfig -a" will show you the current configuration.
For the internet to function, 4 things must be in place: 1. The network card has a driver attached. 2. The network card is plumbed with an interface. 3. The DNS is configured. 4. Routing is configured. If ifconfig -a shows interfaces other than just lo0 , try pinging the IP address of your internet router, e.g. "ping 192.168.0.250". It will either say "192.168.1.250 is alive" or sit doing nothing until it times out. Cheers Andrew. This message posted from opensolaris.org
