This article provides the basic knowledge of steps before starting the configuration of the switch
Before starting, we need to make sure we have a working console cable and an application to access the CLI (for example, Putty is the most common one).
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In some cases, the switch will display a message for an "auto-image upgrade" and the same repeats often on the screen. Even if this appears, it will not "break or interrupt" what you were typing but, we need to remove this line in the configuration to stop them:
root@# delete chassis auto-image-upgrade
In most cases, the switches came in "Amnesiac" which means we need to add the Host Name for the switch. This is how it looks:
root@>
The command to add the Host is the following:
root@# set system host-name hostname
The next step would be to add the root user password. After running the following command, the switch will ask you to enter the password but, for security, you will not see the text you are entering:
root@# set system root-authentication plain-text-password
New password: type password
Retype new password: retype password
And finally, we just need to apply the changes to start configuring the switch:
root@# commit
Below you will find some links with more details of the above configurations.
Configuring Junos OS for the First Time on a Device with a Single Routing Engine
Initial Configuration Overview for Juniper Networks Devices
auto-image-upgrade