Bay Networks 5390 Administering page 247

Chapter A11 Dial-up Networking
In dial-up networking, users gain remote access to a local area network using modems and dial-up
telephone lines. The Model 5390 implementation of protocols such as SLIP and PPP provides dial-in
connectivity in a multiprotocol network. Using the Model 5390 server as a dial-up server, a remote
user can dial into a modem connected to the Model 5390 server and become a directly connected
network node; the Model 5390 server is then transparent to the user. The Model 5390 server can
also generate a call to the remote server and become a directly connected network node while
remaining transparent to the user.
For details on using modems, see Modems starting on page A6-1.
For details on using a SLIP link, see Serial Line Internet Protocol (SLIP) starting on page A7-1.
For details on using a PPP link, see Point-to-Point Protocol (PPP) starting on page A8-1.
For details on filtering, see Filtering starting on page A13-1.
Dynamic Dialing
Dynamic dialing allows system administrators to define a database of information about a modem
pool and a set of virtual dial-out routes. The Model 5390 server assigns each virtual dial-out route
dynamically to ports in that pool. Each virtual dial-out route must be configured within the Model
5390 configuration file to start the dial-out connection (for more details, see Dial-out Routes on
page A14-42).
Dynamic dialing also provides:
• Dial-on-demand network routing by having the Model 5390 dial-out routes configured with
the proper static network routes (thus, the Model 5390 server can route traffic to a particular
network through a dial-out route's destination).
• The use of chat scripts (a sequence of commands that are used to log into the remote system
after the phone connection is established and before IP forwarding begins; for more details,
see Chat Scripts on page A14-43).
893-741-B
NOTE: Dial-out routes are defined in the Model 5390 configuration file.
Setting Up the Configuration File on page A14-5 provides a sample
configuration file; Creating dialout Entries in the Configuration File on
page A14-37 describes how to create dialout entries in the configura-
tion file. Dynamic dialing applies only to IP framing protocols.
A11-1