In Solaris 10 11/06 and earlier releases, two maps were added for NIS : ipnodes.byname and ipnodes.byaddr. These maps contained both IPv4 and IPv6 host name and address associations. Tools that are aware of IPv6 used the ipnodes NIS maps. The hosts.byname and hosts.byaddr maps contained only IPv4 host name and address associations. These maps are unchanged so that they can facilitate existing applications. Administration of the ipnodes maps is similar to the administration of the hosts.byname and hosts.byaddr maps. For Solaris 10 11/06, it is important that when you update the hosts maps with IPv4 addresses, the ipnode maps are also updated with the same information.
Subsequent releases of Oracle Solaris 10 do not use the ipnodes maps. The IPv6 functionality of the ipnodes maps is now maintained in the hosts maps.
For instructions on administering NIS maps, refer to Chapter 5, Setting Up and Configuring NIS Service, in System Administration Guide: Naming and Directory Services (DNS, NIS, and LDAP).