This assumes the Reduced Network Support software group was chosen during initial installation.
These packages will need to be installed in this order:
SUNWgssc
SUNWgss
SUNWsshcu
SUNWsshdr
SUNWsshdu
After these are installed, you will have to generate host keys for sshd. You do this with the following command:
/lib/svc/method/sshd -c
Now that the keys exist sshd can be started with this command:
svcadm enable -t ssh
And made to start at boot with this command:
svcadm enable ssh