Your system try to mount an external resource (File system)
Maybe the server is not reachable or not right configured.

Test the network connection on both sides (Firewall?)

On our system:
more /etc/vfstab # If your system mount the external file system automatically


On the NFS server:
dfshares # shows what is shared now
more /etc/dfs/dfstab # configuration file

If the two system are both solaris system there is normaly no problem. But if there is a linux server use you have to check the version of nfs

output of /etc/default/nfs

# Sets the maximum version of the NFS protocol that will be registered

# and offered by the server. The default is 4.

#NFS_SERVER_VERSMAX=4





many question but no response (logfiles etc).
It makes no fun do homework for other.

Br Joerg