Use the network-to-network PPP configuration to create an internetwork joining two networks in physically separate locations. In this case, modems and PPP software function as the router connecting the networks.
Addressing method - The configuration file must include the host names or IP addresses of the machines that communicate over the link. Two possible addressing scenarios exist for this type of configuration; they are explained in "Determining IP Addressing for Your PPP Link".
Name service - NIS and NIS+ name services can function over this type of PPP link; however, each network should be a separate domain. If you use DNS, both networks can be part of a single domain. Refer to Solaris Naming Administration Guide for details. If you use local files for name service, the /etc/inet/hosts files on both endpoint machines are used for address resolution. They must contain the host names and IP addresses of every host on each network that can communicate over the link.