Chapter 2: User Interface

There are two interfaces of Junos OS from where we can configure Junons devices.

1. The Junos CLI (Command Line Interface): The Junos CLI is a text-based command shell. Accessing the CLI is done with the help of out-of-band (OoB) serial console connection. The console port settings are predefined and are not user configurable. Second option is with the help of accessing the CLI is over the network (in band) using access protocols such as Telnet or SSH. Unlike the console connection, these access options require configuration for a network port and the access protocol.

   

   Junos OS CLI interface

2. J-Web Interface: It is a Web-based graphical user interface (GUI) that you access by using either HTTP or HTTPS protocols. It provides quick configuration wizards to simplify the most common configuration tasks. For more complicated configurations, the J-Web GUI allows you rto directly edit the system's text configuration file. It is installed and enabled by default on Junos OS. 

   

   Junos OS GUI

Junos OS access, requires login username and password. 'root' user is the super user or administrator in Junos OS. Nonroot users are placed into the CLI automatically. The root or administrator creates user accounts and assigns permissions. The root user must start the CLI from the shell.

CLI and Shell