"Unknown Host" Error for Solaris 10

My system doesn't get the hostname set using DHCP when I installed Solaris 10 x86 on my laptop. After a lot of googling, reading sun docs and blogs.
I finally found this simple way.

If your system display "uknown host" messeage,
Just create ' /etc/nodename file ' like as bellow.

# vi /etc/nodename
yourhostname