After my LDAP server stopped working I had to re-configure my Mac to use NIS which caused me a lot of problems under Mac OS X in the past. But it seems that Apple actually fixed NIS support in Mac OS X Leopard. During the two days I used NIS as the directory service on my Mac I didn’t experience any login failures or NFS problems. AutoFS, the new automounter, even picked up the hierarchical Solaris-style automounter maps that my NIS server provides.
Since yesterday evening my Mac is using LDAP again after I managed to fix the LDAP server. But it is good to know that I can use NIS as backup solution.