Troubleshooting Automounter Problems
If the automounter subsystem on an NFS client is not mounting file systems that are listed in your nameservice auto_* maps, use the following checklist.
Check the settings in the /etc/nsswitch.conf file to make sure that the automounter is able to read information from the specified nameservice—nis, nisplus, or ldap.
Check to make sure that the NFS client has the default auto_master and auto_home maps and that they are in the /etc directory.
If the maps are there, check to make sure that the auto_master map contains the +auto_master entry and that the auto_home map contains the +auto_home entry. These entries ...