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Introduction 171
SmartWare Software Configuration Guide 14 • Serial port configuration
Introduction
This chapter provides an overview of the serial port and describes the tasks involved in its configuration
includes the following sections:
• Serial port configuration task list
• Configuration tasks
• Examples
The V.35 standard is recommended for speeds up to 48 kbps, although in practice it is used successfully at 4
Mbps. The X.21 standard is recommended for data interfaces transmitting at rates up to 2 Mbps and is used
primarily in Europe and Japan.
The synchronous serial interface supports full-duplex operation and allows interconnection to various serial
network interface cards or equipment. Refer to the getting started guide included with your SmartWare for
specific information regarding the connector pinout and the selection of cables to connect with third-party
equipment.
Serial port configuration task list
Perform the tasks in the following sections to configure a synchronous serial interface:
• Disabling an interface (see page 171)
• Enabling an interface (see page 172)
• Configuring the serial encapsulation type (see page 173)
• Configuring the hardware port protocol (see page 173)
• Configuring the active clock edge (see page 174)
• Configuring the baudrate
Disabling an interface
Before you replace a compact serial cable or attach your SmartNode to other serial equipment, use the
shutdown command to disable the serial interfaces. This prevents anomalies and hardware faults. When you
shut down an interface, it has the state CLOSED in the
show port serial command display.
Note Use the no shutdown command to enable the serial interface after the con-
figuration procedure.
This procedure describes how to shut down a serial interface
Mode: Administrator execution
Step Command Purpose
1 node(cfg)#port serial slot port Selects the serial interface on slot and port
2 node(prt-ser)[slot/port]#shutdown Shuts the selected interface down
3 node(prt-ser)[slot/port]#show port serial Displays the serial interface configuration.