On Solaris, the proper syntax for the /etc/dfs/dfstab file consists of executable lines that begin with the share command.

Like so: share [-F fstype] [ -o options] [-d "<text>"] <pathname> [resource]

Here's an exmaple:

share -F nfs -o rw=@192.168.1.0/24 -d "hostname:/export/d0" /export/d0