Configuration Groups

Configuration groups allow you to create a group containing configuration statements and to direct the inheritance of that group’s statements in the rest of the configuration. The same group can be applied to different sections of the configuration, and different sections of one group’s configuration statements can be inherited in different places in the configuration.

Configuration groups allow you to create smaller, more logically constructed configuration files, making it easier to configure and maintain the JUNOS software. For example, you can group statements that are repeated in many places in the configuration, such as when configuring interfaces, and thereby limit updates to just the group.

You can also use wildcards in a configuration group to allow configuration data to be inherited by any object that matches a wildcard expression.

The configuration group mechanism is separate from the grouping mechanisms used elsewhere in the configuration, such as Border Gateway Protocol (BGP) groups. Configuration groups provide a generic mechanism that can be used throughout the configuration but that are known only to the JUNOS software command-line interface (CLI). The individual software processes that perform the actions directed by the configuration receive the expanded form of the configuration; they have no knowledge of configuration groups.

This chapter discusses the following topics:

• Understanding the JUNOS Configuration Groups
• Creating a JUNOS Configuration Group
• Applying a JUNOS Configuration Group
• Example: Configuring and Applying JUNOS Configuration Groups
• Example: Creating and Applying Configuration Groups on a TX Matrix Platform
• Disabling Inheritance of a JUNOS Configuration Group
• Using Wildcards with Configuration Groups
• Configuring Sets of Statements with Configuration Groups
• Configuring Interfaces Using JUNOS Configuration Groups
• Configuring a Consistent Management IP Address
• Configuring Peer Entities
• Establishing Regional Configurations
• Selecting Wildcard Names
• Using JUNOS Default Groups
• Example: Referencing the Preset Statement
• Example: Viewing Default Statements That Have Been Applied to the Configuration
• Inheritance Model
• Configuration Groups Configuration Statements
• Configuration Groups Configuration Guidelines
• Examples: Configuration Groups
• Using JUNOS Default Groups

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