July 2009
Intermediate to advanced
752 pages
23h 19m
English
Content preview from JUNOS Enterprise SwitchingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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JUNOS Software Overview
To quote from JUNOS Enterprise Routing:
JUNOS software is cool. It just is. The designers of JUNOS software put tremendous thought into making a stable, robust, and scalable operating system that would be a positive for the router. They were able to learn from previous vendors’ mistakes, and create an OS that other companies will forever use as their model.
JUNOS software is cool, and the fact that the same JUNOS software that runs on the EX platform runs on the largest router that Juniper makes, the TX Matrix, is really cool.
JUNOS software is a modular operating system that promotes stability and reliability. The modularization is achieved through the use of software daemons that run in protected memory space. The stability stems from well-written and tested code; choosing a well-known, open source, and stable kernel of FreeBSD on which to build JUNOS did not hurt, of course.
The kernel and its functions are normally not directly visible to the user, but many features of FreeBSD have been ported to the command line of JUNOS, and many that have not are still available, albeit at the shell prompt. The kernel supports the various user processes (daemons), maintains the forwarding table synchronization between the RE and the PFE, and provides interface-related routing functions such as performing ARP and installing local and direct routes in the routing table (RT).
Riding on top of the kernel are the software processes that provide JUNOS services and the user interfaces ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.