Junos SSH public key authentication is the feature that allows administrators to log in to the Juniper devices without a password. It is attractive and secure at the same time. It is particularly useful in network automation.
The initial configuration of Juniper devices is the first step after purchasing a Juniper device. Initial configuration typically means enabling root authentication which is required, configuring a hostname and management IP address, and enabling SSH or Telnet remote access. It can also be a good idea to configure domain names, name servers, time zones and NTP servers. We will also learn how to revert back to the default factory configuration or erase all configuration and data files to reconfigure the juniper device from scratch.
Junos rescue configuration file is helpful in the situation that your device’s configuration file has been misconfigured or lost. It allows you to define a known or healthy configuration as a rescue configuration that you can roll back to at any time.
Junos save and load commands are to save the entire or part of the configuration or output of any show commands, locally on the device or on a remote server. this is what we will discuss in this section.
Junos “commit” command apply configuration changes to active configuration. Up to 50 configuration changes are stored in juniper devices. “rollback” command restore the configuration of any of these 50 stored committed versions. We know both commit and rollback commands from the previous sections, but this section will add some handy and useful tips about these two commands.
Junos CLI Navigation is the topic of this section. in other words how to navigate command hierarchy and how it helps us to configure juniper devices.
Juniper Junos configuration types and configure commands are what we will discuss and demonstrate in this section. we have two types of Junos configuration, active configuration in which is live and candidate configuration which includes also some changes which will be active after commit command. If there are multiple Juniper admins on the network, what happens if they configure at the same time and some configurations conflict? We will see the difference between "configure", "configure private" and "configure exclusive" in this regard.
Junos output level and filtering allow us to control and filter the output of Junos show commands. This allows you to control how much detailed information is displayed. And only show the part of the output that is more important to us.
Junos CLI modes is the start of the topic where we learn how to work with Junos CLI user interface. This section introduces Junos CLI modes including shell mode, operational mode, and configuration mode where you can configure, monitor, and troubleshoot your configurations.
JNCIA-Junos Introduction and Lab Preparation is the topic of this section. Juniper Junos Associate course or JNCIA-Junos is a prerequisite for all other Juniper courses such as CCNA in Cisco courses. In this course we will learn how to work with Junos, i.e. OS of juniper devices, especially through the CLI interface.