site_logo

Next Next


  1. JNCIA exam sim
  2. Juniper JNCIA Netsim
  3. JNCIA ExamSim with Netsim

Juniper JUNOS Fundamentals

2.2 JUNOS Filtering output

JUNOS provides several ways to filter the output of show commands in order to view only the information that is relevant to your needs. Some of the most common methods for filtering output in JUNOS include:

  • 1. Regular expressions: Regular expressions can be used to match specific patterns in the output of a show command. For example, you can use a regular expression to match all interfaces that have the word "ge-" in their name.

  • 2. Pipes and redirects: Pipes and redirects can be used to filter the output of a show command and send it to a file or another command for further processing. For example, you can use a pipe to send the output of a show command to the "grep" command in order to search for specific text in the output.

  • 3. Filtering with the "| match" command: The "| match" command can be used to filter the output of a show command based on specific keywords or patterns. For example, you can use the "| match ge-" command to display only information about interfaces that have the word "ge-" in their name.

  • 4. Filtering with the "except" command: The "except" command can be used to filter the output of a show command by excluding specific keywords or patterns. For example, you can use the "except ge-" command to display all information except for information about interfaces that have the word "ge-" in their name.

By using these methods, you can effectively filter the output of show commands in JUNOS to view only the information that is relevant to your needs, saving you time and making it easier to manage your network devices.

2.3 JUNOS Active versus candidate configuration

JUNOS has two main types of configuration: active configuration and candidate configuration.

  • 1. Active Configuration: The active configuration is the configuration that is currently in use by the Juniper device and is stored in the device's memory. The active configuration is used to control the behavior and functionality of the device, and it can be viewed with the "show configuration" command.

  • 2. Candidate Configuration: The candidate configuration is a configuration that has not yet been committed to the active configuration. The candidate configuration is used to make changes to the device's configuration, and these changes can be tested in a safe and non-disruptive manner. Once the changes have been tested and are deemed to be correct, they can be committed to the active configuration. The candidate configuration can be viewed with the "show configuration | compare" command, which shows the differences between the active and candidate configurations.

In Junos, all changes to the configuration are made to the candidate configuration, and it is only when the changes are committed that they become part of the active configuration. This approach allows administrators to make changes to the configuration in a safe and controlled manner, and to undo changes if necessary. The ability to maintain a separate candidate configuration is a key feature of the Junos operating system and is an important part of best practices for configuring and managing Juniper devices.

Next Next




simulationexams.com ad

certexams.com ad