The Junos CLI | Introduction to Juniper and JNCIA Part 2

Let’s start by looking at the basics of the CLi and the configuration hierarchy.

Juniper devices run Junos OS, which is built on Free-BSD or Linux.
There are two modes in Junos; Operational (where we use commands like ping) and configuration (where we configure the device).
When we change mode, the last symbol in the prompt changes as well.
Operational mode commands can be run from within configuration mode by starting each command with ‘run’.

Junos comes with a built-in ‘help’ command that you can use at any time.
Commands can be tab or space completed, and variables can be tab completed.

The Junos configuration uses a highly structured hierarchy, which looks like JSON formatted data. This makes it easy to search and parse.
This behaves like a file system, where each level of configuration is like a directory, and instead of containing files, it contains settings.
Settings are added with the ‘set’ command, and removed with the ‘delete’ command.
Configuration changes aren’t applied immediately. Instead they need to be ‘committed’ with the ‘commit’ command.

Overview of this video:

0:00 Introduction

0:10 CLI Modes

1:38 Simple Commands

3:52 Configuration Hierarchy

Further reading:

LET'S CONNECT

#NetworkDirection
#networking
#Juniper

[DZ-ntow]

This series is so ridiculously well done. Probably the best Juniper playlist on YouTube.

[jairusan]

Oh, this is great. I am so excited to go through this series with you, I really enjoy your technical demonstrations and style. There are not many YouTubers organized and with a great understanding of technologies like you, I really appreciate sharing such great information with us. Looking forward to the next skill.

[AZwupatki]

Great content, I have my Junos Cert and for me the biggest asset was buying a SRX100. Having physical hardware to update, plug into and learn about the cli and gui interfaces helped to reinforce what I had learned.

[TIMPRON]

Thanks for the great series, I've been using srx300 for a while now however I never fully understood the whole structure and how it's functions( we deal with a ton of different vendors which makes it impossible to master all of them). I am randomly going through the series and so far I learnt a lot and have more to learn, I will need to go over again and also get access to the content on Patreon when I am ready. Thank you ☺️

[clckwrx]

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[azam-khan]

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[alaa-hammad]

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[Jota_VA]

Thank you very much for all these awesome resources.

[johnnilolandicho]

Thank you sir, I am preparing for my JNCIA exam and this is really helpful

[MC_pastor]

Thx for your job. Waiting for your new videos.

[nadzeyahutsko]

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[srh_btk]

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[leothalion]

Is there a program that I can download to use and follow along with?