Exploring Junos' User Interface Customization

Juniper Networks' Junos operating system is renowned for its robustness, scalability, and flexibility. One of the key features that make Junos stand out is its ability to customize the user interface. This post will delve into the various ways you can customize the Junos user interface, a topic that is crucial for students studying for the JNCIS-ENT certification.

Understanding Junos CLI Operational and Configuration Modes

Before we delve into customization, it's important to understand the two primary modes of the Junos CLI: Operational and Configuration.

Operational Mode: This is the default mode when you log into a Junos device. It allows you to monitor and troubleshoot the device.

Configuration Mode: This mode allows you to make configuration changes to the device. You can enter this mode by typing configure at the operational mode prompt.

cli> configure
Entering configuration mode

Customizing the Junos CLI

CLI Banner

You can customize the login banner that appears when you log into the device. This can be useful for displaying important information or warnings. Here's how to set a login banner:

cli# set system login message "Authorized access only!"

CLI Prompt

You can also customize the CLI prompt to display specific information. For example, you can set the prompt to display the current user and host:

cli# set cli prompt "%user@%host>"

Operational Mode Aliases

Aliases can be created in operational mode to shorten long commands. For example, you can create an alias sh for the show command:

cli# set cli alias sh show

Now, you can use sh instead of show:

cli> sh interfaces terse

Configuration Mode Groups

In configuration mode, you can use groups to apply a set of configurations to multiple devices. For example, you can create a group nyc-routers and apply specific configurations to all routers in New York City:

cli# edit groups nyc-routers
cli# set system ntp server
cli# set system syslog host
cli# top
cli# set apply-groups nyc-routers

Customizing the Junos Web Interface (J-Web)

Junos also provides a web-based interface called J-Web. You can customize the J-Web interface by changing the theme, layout, and language.

To change the theme, go to the Preferences menu, select Appearance, and choose your preferred theme.

To change the layout, go to the Preferences menu, select Layout, and choose your preferred layout.

To change the language, go to the Preferences menu, select Language, and choose your preferred language.


Customizing the Junos user interface can enhance your productivity and make the interface more intuitive. Whether you're using the CLI or J-Web, Junos provides a range of customization options to suit your needs. As you prepare for the JNCIS-ENT certification, understanding these customization options will not only help you pass the exam but also equip you with practical skills for managing Junos devices in a real-world environment.

© Ben Jacobson.RSS