Chapter 9Configuring X.25Ports configured as physical X.25 support connections to X.25 DTEs or to an X.25network. Ports configured as logical X.25 support logical X.25 links over a physicalframe relay port.Required and Optional ConfigurationTo run X.25 in an FRX8000 Switch or N74/7500, make sure the following are cor-rectly configured in the database:l Network Defaults, described in Chapter 4. This file must be configured for anew network. After that, no further changes are generally necessary.l Node parameters, described in Chapter 5. A record must exist for everyFRX8000, N7400, and N7500 on the network.l Line Processor, described in Chapter 6. A record must exist for every LP inevery node.l Trunk (Chapter 7) or frame relay (Chapter 8) port(s) that will connect to thenetwork and/or PVC(s).l X.25 Port, described on page 9-2. A record must exist for every port on everyLP in every node. Each X.25 port’s record will identify the port and define itsoperating parameters.l Closed User Groups (CUG), described on page 9-11, if the feature will be used.l Modem Initialization record, described on page 9-12, if the (RS-232 physicalinterface only) port will be connected to a V.25bis modem.l Subscriber IDs, described on page 9-14. This file assigns called and callingaddresses to serial ports, and defines alternate routing paths.l PVC connection, described on page 9-18. This record creates a “permanent”connection between two X.25 ports in different nodes. The FRX8000 also sup-ports async-to-X.25 PVCS (described in Chapter 13) and IP-over-X.25 PVCs(described in Chapter 14).l Telephone number, described on page 9-27, if the port will be connected to aV.25bis modem.
