While it's not difficult to change the IP address of a Solaris box,
it's not entirely obvious.
Become root.
Edit /etc/hosts. Find the line which specifies sauron's
own ip address. It will look something like
192.168.1.5 sauron #this computer
Comment this line out. Uncomment the similar corresponding line in the
Experiment Room 3 section of the file. /etc/hosts is
well-commented and it should be clear which lines to edit.
Edit /etc/defaultrouter. Comment out the room 6 line and
uncomment the room 3 line.
Edit /etc/netmasks. Comment out the room 6 line and
uncomment the room 3 line.
That's it. You may now shutdown sauron (use "shutdown -h now" as
root), move it to the other room, and it will boot up properly on that
network.