JUNOS Internet Software Network Operations Guide: Hardware
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Appendices
Appendix A
Command-Line Interface Overview
This chapter provides an overview of the JUNOS software command-line interface
(CLI). For more detailed information about using the JUNOS software CLI, see the
JUNOS System Basics Configuration Guide and the JUNOS Protocols, Class of Service, and System Basics Command Reference .
The CLI is the interface to the software that you use whenever you access the router—whether from the console or through a remote network connection. The
CLI, which automatically starts after the router finishes booting, provides commands that you use to perform various tasks, including configuring the JUNOS software, and monitoring and troubleshooting the software, network connectivity, and the router hardware.
The CLI has two modes:
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CLI Operational Mode on page 633
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CLI Configuration Mode on page 639
CLI Operational Mode
In operational mode you enter commands to monitor and troubleshoot the software, network connectivity, and router by entering commands.
When you log in to the router and the CLI starts, you are at the top level of the CLI operational mode. At this level, there are several broad groups of CLI commands
(see Table 133).
Table 133: CLI Operational Mode Top-Level Commands
Command clear configure
Description
Clear statistics and protocol database information.
Syntax: clear <arp | bfd | bgp | firewall | helper | igmp | ike | ilmi | interfaces
| ipv6 | isis | ldp | log | mld | mpls | msdp | multicast | ospf | pim | rip | ripng
| route | rsvp | services | snmp | system | vrrp>
Enter CLI configuration mode.
Alternative commands: configure <exclusive | private>
CLI Operational Mode !
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