NIS+ supports the following combinations of systems:
SunOS release 5.6 software installed on all servers and clients
SunOS release 5.6 software installed on one server, but combined with some SunOS release 4.x servers
For a network, there are three main migration paths from NIS to the NIS+ name service:
Upgrade all servers and clients to NIS+
Upgrade all servers at once to NIS+ and enable its compatibility mode to support SunOS 4.x clients
Use different domain names so NIS and NIS+ can coexist
The first step to upgrading your network is to decide which servers to upgrade to the NIS+ name service and which servers can continue to run NIS. See NIS+ Transition Guide for more information.