Assigning a Network Number to the PPP Link

You create a new network number for the PPP configuration when it involves:

• Virtual networks of computers communicating through PPP multipoint links (required)

• A multipoint dial-in server and its remote hosts (required)

• The PPP link between two networks, particularly when one or both of the network endpoint machines are also routers for a physical network (optional)

(See Chapter 5, Planning Your TCP/IP Network for information on network numbers.)

The PPP link becomes a virtual network, since it does not involve any physical network media. You need to type its network number in the networks database on all endpoint machines, along with the network numbers of the networks being linked.

The following sample shows an /etc/inet/networks file for an internetwork with PPP.

Example 22-1 /etc/inet/networks File for an Internetwork With PPP

kalahari      192.9.253
negev         192.9.201
nubian-ppp    192.29.15

In the sample file, kalahari and negev are two local area networks, and nubian-ppp is the name of the PPP link.