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Enterprise Routing and Switching, Specialist

This course is the final course in our seven-course series designed to fully prepare you for the JNCIS-ENT(JN0-32) exam. These CBT Nuggets courses are:...
This course is the final course in our seven-course series designed to fully prepare you for the JNCIS-ENT(JN0-32) exam. These CBT Nuggets courses are: This JNCIS-ENT(JN0-343) – High Availability course prepares you for the following topics:
  • Identify the concepts, benefits, applications, and requirements for high availability in a Junos OS environment:
    • Link aggregation groups (LAG)
    • Redundant trunk groups (RTG)
    • Virtual Chassis
    • Graceful restart (GR)
    • Graceful Routing Engine switchover (GRES)
    • Nonstop active routing (NSR)
    • Nonstop bridging (NSB)
    • Bidirectional Forwarding Detection (BFD)
    • Virtual Router Redundancy Protocol (VRRP)
    • Unified In-Service Software Upgrade (ISSU)
  • Demonstrate knowledge of how to configure and monitor high availability components:
    • LAG and RTG
    • Virtual Chassis
    • GR, GRES, NSR, and NSB

NOTE: This course is also valuable for those interested in learning High Availability topics that are using other vendor equipment. Juniper-specific Nuggets are clearly labeled as such.
Recommended Experience
  • Students interested in taking this certification exam must have passed their JNCIA-Junos certification
Recommended Equipment
  • Junosphere or other virtual Juniper training equipment
  • Juniper rental rack access
  • Juniper lab routers and switches
Related Certifications
  • JNCIS-ENT Enterprise Routing and Switching, Specialist
Related Job Functions
  • Enterprise Network Engineer
  • Enterprise Network Administrator
Anthony Sequeira has been a CBT Nuggets trainer since 2012 and holds a variety of Juniper, Cisco, and Microsoft certifications, including CCIE R&S. His JNCIA-Junos course here at CBT Nuggets remains one of the top-rated courses in the library.
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1. High Availability Course Introduction (4 min)
2. Using Your High Availability Flash Cards (5 min)
3. Link Aggregation Groups (LAGs) and Redundant Trunk Groups (RTGs) (8 min)
4. Hands-on Lab: LAGs and RTGs (6 min)
5. Virtual Chassis (8 min)
6. Hands-on Lab: Virtual Chassis (5 min)
7. GR, GRES, NSR, and NSB (10 min)
8. Hands-on Lab: GR, GRES, and NSR (4 min)
9. Bidirectional Forwarding Detection (BFD) (7 min)
10. Virtual Router Redundancy Protocols (VRRP) (11 min)
11. Hands-on Lab: VRRP (4 min)
12. Unified In-Service Software Upgrade (ISSU) (4 min)
13. Hands-on Lab: ISSU (2 min)

High Availability Course Introduction


Whatever happened to the good old days, you know, when you and I were network admins and the network could be unavailable for, like, three minutes and everyone would just see the hourglass and say, ah well, the network's just teacupping, no big deal.


Nowadays, three minutes, unacceptable. Three seconds is probably unacceptable these days. One of the reasons is, of course, networks are converging. We're moving voice, video, collaboration traffic on to the data network. And everyone expects the connection to be as incredible as your connection to CBT Nuggets and you hearing my voice right now.


In this Nugget, we'll take a look at high availability features we can implement to ensure the network is always available, or at least as much as humanly possible. As you probably know, this is part of the JNCIS-ENT series of courses that we completed here at CBT Nuggets.


We began at Layer 2. We moved to Layer 3 interior gateway protocols. We looked at a Layer 3 exterior gateway protocol. We talked about protocol independent routing stuff in tunnels. And now we wrap up with a whole host of high availability features. Some you will afford.


Some you will go through the practice of configuring. Others you might not. But, we do want to give you a nice menu to choose from. Now, if this is such an important topic-- in fact, it just brought to mind another very important topic today, and that would be network security, right?


Well, this if this is such an important topic, this high availability, you would expect that there would be a whole lot of mechanisms. And that they would have different scope like Layer 2 scope, Layer 2 and Layer 3 scope. Maybe the scope of a link between two objects.


Maybe the scope of the two objects themselves. And that's exactly what we find. Similar to security, where we really secure an environment by doing what we call a defense in-depth strategy, we have Layer 2 stuff going on. Layer 3 stuff going on. Stuff on links.


Stuff between devices. That's what we're going to do with high availability. We're going to have a whole list of potential features. And when you and I are designing and engineering networks of today, we're going to decide which features would be appropriate for that environment.


Like I said, we might not do all of this stuff you see on screen, but we might be taking advantage of a lot of it, given a particular scenario. If money's never an object and the administrative overhead is never an object, well then we do shoot for as many of these as possible.


By the end of this course, you'll know all of these mechanisms intensely. And many of them, you'll know how to configure on Juniper equipment. Now you may have noticed a couple of items there like Graceful Restart and the Virtual Router Redundancy Protocol.


And you may have said, you know what, that's not Juniper specific stuff. I've heard of Graceful Restart in other vendor environments. I know that VRRP is an open-standard protocol for router redundancy. What's going on here? I thought this is a Juniper course.


Well, keep in mind that there are a lot of these technologies that I understand you may be here to learn from a vendor neutral perspective. And that's why I will have everything that is going to be specific to Juniper tucked away in Handson Labs. It'll be titled that way.


So if you want to just learn some theory, let's say, of VRRP, and you really don't care about its implementation on these Juniper devices, have no fear. You're in the right place. By the way, for those of you interested in certification, I'll be doing something to help you dramatically.


We'll have pop quizzes as we move throughout this material. And I'll compose those so that they're at as close to the actual style of exam questions that I can do, legally, with Juniper. And then finally, I'll be take notes for you and I'll be making electronic flashcards for you, so that if you're interested in certification, or if you just want to make sure you get the very most from the course, you can run through those flashcards.


And in fact, in the very next Nugget, I'll teach you exactly how you're going to do that. So let's not take a lot of time in this introduction because, as you saw from that list of objectives, we have a lot of different technologies that we want to cover with you in this course.


I hope you found this Nugget informative. And I'd like to thank you for viewing.

Using Your High Availability Flash Cards

Link Aggregation Groups (LAGs) and Redundant Trunk Groups (RTGs)

Hands-on Lab: LAGs and RTGs

Virtual Chassis

Hands-on Lab: Virtual Chassis


Hands-on Lab: GR, GRES, and NSR

Bidirectional Forwarding Detection (BFD)

Virtual Router Redundancy Protocols (VRRP)

Hands-on Lab: VRRP

Unified In-Service Software Upgrade (ISSU)

Hands-on Lab: ISSU

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Intermediate 0 hr 13 videos


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Anthony Sequeira
Nugget trainer since 2012