Command-Line Interface

The JUNOS Internet software command-line interface (CLI) is the primary tool for controlling and troubleshooting router hardware, the JUNOS Internet software, routing protocols, and network connectivity. CLI commands display information from routing tables, information specific to routing protocols, and information about network connectivity derived from the ping and traceroute utilities.

You enter CLI commands on one or more external management devices connected to the Routing Engine through ports on the craft interface. There is a port labeled CONSOLE for attaching a system console, a port labeled AUXILIARY for attaching a laptop, modem, or other auxiliary device, and a port labeled MANAGEMENT ETHERNET for attaching to a management LAN. For more information, see Routing Engine LEDs and Interface Ports.

For information about using the CLI to display details about alarms generated by interfaces and hardware components, see Hardware and Interface Alarm Messages.