New Training: Advanced IS-IS Foundations
| new skills - Team Nuggets

New Training: Advanced IS-IS Foundations

In this 10-video skill, CBT Nuggets trainer Knox Hutchinson explores deeper theoretical understandings of IS-IS on Junos devices. Watch this new Juniper training.

Learn Juniper with one of these courses:

This training includes:

  • 10 videos
  • 1.4 hours of training

You’ll learn these topics in this skill:

  • Introducing Advanced IS-IS Foundation
  • Multi-Level IS-IS Refresher
  • IS-IS Packet Types
  • Basic Multi-Level IS-IS Deployment on JUNOS
  • LSPDU Contents and Common TLVs
  • PDU Flooding and Mesh Groups
  • Metric Tuning
  • Validating IS-IS Config and LSDB
  • Hierarchical Authentication
  • Summarizing Advanced IS-IS Foundations

What is An IS-IS Hello Packet?

IS-IS is an interior gateway protocol (IGP) available on Juniper networking equipment. Much like OSPF, it's a link-state-based IGP. It's preferred over OSPF due to its inherent security and modularity, though. Likewise, much like OSPF, it uses something called a 'Hello' packet for discovery.

A 'Hello' packet is a broadcast packet used to discover the identity of neighboring networking devices. It uses these packets to determine if other devices are level 1 or level 2 intermediate devices.

These 'Hello' packets come in three forms:

  • Point-to-Point hello packets
  • Level 1 broadcast links
  • Level 2 broadcast links

It should be noted that level 1 routers have to share the same area address to form an adjacency. Level 2 routers do not have that limitation.

The length of each 'Hello' packet is preset. IS-IS routers do not resize these packets. Instead, each interface supports the maximum packet size of 1492 bytes. Packets are padded to meet this size.



Ultimate Networking Cert Guide

A 97-page guide to every Cisco, Juniper, F5, and NetApp certification, and how they fit into your career.

By submitting this form you agree that you have read, understood, and are able to consent to our privacy policy.


Learn anytime anywhere with our mobile apps.

I have read and understood the privacy policy and am able to consent to it.

© 2021 CBT Nuggets. All rights reserved. Terms | Privacy Policy | Accessibility | Sitemap | 1550 Valley River Drive, Eugene, OR 97401 | 541-284-5522
CBT Nuggets