Moving Your DECnet Phase IV Network to DECnet-Plus
If you are planning to
transition your network from DECnet Phase IV to DECnet-Plus, you
can move portions of the network to DECnet-Plus or move the entire
network. Because DECnet-Plus is backward compatible, you can choose
to run your system and the network in the same manner as you have
before, using DECnet Phase IV applications, routing, and so forth.
You can implement the additional functionality available to you from
DECnet-Plus any time you are ready. The changes mostly involve network
management. They are almost entirely transparent to users and applications.
A number of automated tools (DECnet transition utilities and
the NCP Emulator) are available, in addition to the simplified configuration
procedures, to help ease the transition to full DECnet-Plus functionality.
For detailed information about transitioning your network,
refer to the DECnet-Plus Planning Guide manual.
HP OpenVMS System Manager's Manual, Volume 2:... 
Network Considerations
