Troubleshooting Cisco Networks: Internet Security for CCNP R&S 300-135 TSHOOT

If you need to bridge the gap to get into the network security or service provider space, or if you just need to pass the TSHOOT exam, this course will test and hone fundamental troubleshooting skills related to BGP, redistribution, and GRE tunnels.
Course info
Level
Intermediate
Updated
Mar 6, 2017
Duration
2h 8m
Table of contents
Description
Course info
Level
Intermediate
Updated
Mar 6, 2017
Duration
2h 8m
Description

With secure Internet connectivity becoming more of a business necessity, being able to resolve problems with BGP and GRE tunnels is a key skill for any network admin. In this course, Troubleshooting Cisco Networks: Internet Security for CCNP R&S 300-135 TSHOOT, you'll learn to troubleshoot problems with BGP and GRE tunnels. First, you'll learn to troubleshoot eBGP and iBGP peerings. Next, you'll learn to troubleshoot redistribution between BGP and IGPs. Finally, you'll learn how troubleshoot GRE and IPsec tunnels. When you're finished with this course, you'll have the skills and knowledge needed to troubleshoot almost any problem with BGP or GRE tunnels, including problems found on the CCNP TSHOOT exam. Software required: Cisco VIRL.

About the author
About the author

Ben Piper is an IT consultant and the author of "Learn Cisco Network Administration in a Month of Lunches" from Manning Publications. He holds numerous certifications from Cisco, Citrix, and Microsoft.

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Section Introduction Transcripts
Section Introduction Transcripts

Course Overview
Hi everybody, I'm Ben Piper, independent IT consultant and published author, and welcome to my course, Troubleshooting Cisco Networks: Internet Security for CCNP Routing and Switching 300-135 TSHOOT. In this course, you're going to troubleshoot nine different problems related to external and internal BGP peerings, BGP advertisements, route redistribution with interior gateway protocols, GRA tunnels, and even a little bit of IPsec. This is the 4th course in a 6-course series designed to prepare you for the Cisco CCNP TSHOOT exam, troubleshooting and maintaining Cisco IP networks, which is part of the CCNP Routing and Switching track. By then end of this course, you'll have the confidence to approach almost any problem related to BGP or GRE tunnels, even problems related to IPv6, no matter how complex the problem or the topology, you'll be able to determine where to start, how to narrow the problem down to a specific layer, and even how to figure out what specific technology is causing it. I hope you'll join me on this journey to learn Cisco network troubleshooting with this course, Troubleshooting Cisco Networks: Internet Security for CCNP Routing and Switching 300-135 TSHOOT, only here on Pluralsight.

Lab Setup
If you've gone through the last three courses in the series, you're familiar with the process of importing the course topology, but as I create these courses I do update my copy of the Virtual Internet Routing Labs, or VIRL, and I want to make sure that you are aware of those changes. First things first though, go ahead and boot up your VIRL server. Now I've got to say I'm pretty impressed with the job Cisco's done with this product. They've improved it bit by bit and now it actually boots up pretty fast. You might be running an earlier version of VIRL, and if so, that's okay. I'm running version 1. 2. 83 with IOS version 15. 6. 2. T for the routers, and 15. 2. 4055 for the switches. It's unlikely that you'll run into any problems with an earlier version, but if you're way behind what I'm running then you may want to check the release notes for later versions just to make sure that there aren't any bug fixes that could apply to you.

Troubleshooting BGP
Welcome to this module, Troubleshooting BGP, the Border Gateway Protocol. In this module, you're going to tackle five trouble tickets covering BGP neighborships, missing routes, IP connectivity, and much, much more. Now as always, any technology can come into play at any time, so your troubleshooting is not going to be limited to BGP, but the focus of these problems will be on BGP and its relationship to other technologies, particularly Interior Gateway Routing Protocols. Let's get started.

Troubleshooting GRE Tunnels
Welcome back. In this module, you're going to troubleshoot four tickets that are related in some form or fashion to GRE tunnels. GRE, or Generic Routing Encapsulation tunnels make for some interesting troubleshooting because although they depend on the proper functioning of layer 3, they also create layer 3 virtual tunnel interfaces. GRE effectively tunnels layer 3 over layer 3, what this means is that when you've got GRE tunnels in a network, you effectively have a second virtual network overlaid on top of the underlying physical network. This is one reason many people use GRE tunnels to form virtual private networks over the internet. Of course the internet is a dangerous place so to guard against that GRE tunnels often rely on IPsec for encryption. Needless to say, adding GRE tunnels and IPsec into the mix makes troubleshooting a bit more complicated, but that's why we're here, to learn how to troubleshoot difficult problems with complex technologies. So with that, let's take a look at our next trouble ticket.