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เอกสารอ้างอิง Network_1G ข้อ 4.4

CLI User Guide

To make changes to the configuration file, you have to work in configuration mode in the
CLI. When making changes to a configuration file, you are viewing and changing the
candidate configuration file. The candidate configuration allows you to make configuration
changes without causing operational changes to the active configuration or causing
potential damage to your current network operations. Once you commit the changes
made to the candidate configuration, the system updates the active configuration.
Configuration File Terms

Table 10 on page 182 lists the various configuration file terms and their definitions.
Table 10: Configuration File Terms

Term Definition

active configuration Current committed configuration of a switch.

candidate configuration Working copy of the configuration that allows users to make configurational changes
without causing any operational changes until this copy is committed.

configuration group Group of configuration statements that can be inherited by the rest of the configuration.

commit a configuration Check configuration for proper syntax, activate and mark as the current configuration file
running on the switching platform.

configuration hierarchy Junos OS configuration consists of a hierarchy of statements. There are two types of
statements: container statements, which contain other statements, and leaf statements,
which do not contain other statements. All the container and leaf statements together
form the configuration hierarchy.

default configuration Default configuration contains the initial values set for each configuration parameter
when a switch is shipped.

rescue configuration Well-known configuration that recovers a switch from a configuration that denies
management access. You set a current committed configuration to be the rescue
configuration through the CLI.

roll back a configuration Return to a previously committed configuration.

See Also • Uploading a Configuration File on page 215
• Reverting to the Rescue Configuration on page 225
• Uploading a Configuration File (CLI Procedure)
• Reverting to the Rescue Configuration for the EX Series Switch on page 226

Understanding How the Junos OS Configuration Is Stored

When you edit a configuration, you work in a copy of the current configuration to create
a candidate configuration. The changes you make to the candidate configuration are
visible in the CLI immediately, so if multiple users are editing the configuration at the
same time, all users can see all changes.

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