New Skills

New Training: Understand and Configure Junos Routing

by Team Nuggets
New Training: Advanced OSPF Configurations and Use Cases picture: A
Published on March 17, 2021

In this 10-video skill, CBT Nuggets trainer Knox Hutchinson breaks down how Juniper devices determine next hops and exiting interfaces, as well as how to configure a Junos device for static and dynamic routing. Watch this new Juniper training.

Learn Juniper with one of these courses:

This training includes:

  • 10 videos

  • 1 hour of training

You’ll learn these topics in this skill:

  • Introducing Junos Routing

  • The Fundamentals of Routing

  • Junos Routing and Forwarding Tables

  • How Junos Selects Routes

  • Static Routing

  • Dynamic Routing

  • OSPF Configuration and Verification

  • Junos Routing Instances

  • IPv6 Routing

  • Summarizing Junos Routing

How Junos OS Determines Route Preference

Juniper devices route traffic through a network in different ways. The Juniper OS uses a variety of information for that traffic flow. Here's a quick explanation of how the Juniper OS makes those routing decisions.

The Juniper OS uses information from both its routing table as well as its configuration file to determine active routes. Though it may know of many different routes it can use, it always prefers active routes.

Active routes are chosen based on a score. Typically, Juniper devices prefer the active route with the lowest possible score. Routes are ranked with a value from a range of 0 through 4,294,967,295 (232 – 1). These values are set through a variety of things like different protocols, interfaces, or remote systems.

The Junos OS also provides support for tiebreaker preferences as well. Things like BGP and label switching help determine these preferences. These can also be used to define route preference, too.



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