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- So in this video I'd
like to finally get into

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the process of locating the GNS3 software.

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Where do I go to find the software

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and how do I download it?

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And what does it look like as I'm

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installing it on my laptop?

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So let's talk a little
bit about that stuff.

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So to begin with, if you haven't

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already gone to their website,

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you're gonna wanna go to GNS3.com,

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as you can see right here, GNS3.com.

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And if you haven't already done so,

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you're gonna wanna click on log in,

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and sign up, and from here you're gonna

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type in your username and password

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that you're gonna wanna use.

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So it's free, no Visa
or MasterCard required.

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But it's gonna be necessary in order

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to download the software;

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also we'll gice you access
to the GNS3 Community

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so you can see questions that
people pose and the answers,

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you can pose your own questions,

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read some documents there.

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So go ahead and log in.

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And then from here you
got a couple of choices.

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You could either go up here
to where it says software,

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or you could just click on the

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big, blue Free Download button.

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And you're gonna wanna select the platform

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that you're gonna wanna use.

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Now let me just make a quick mention here.

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All the demonstrations I'm gonna be doing

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are based on Microsoft Windows.

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However once you've got
GNS3 installed and running

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it pretty much operates
the exact, same way,

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the GUI looks exactly the same,

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whether it's on Windows or a Mac or Linux,

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very little variation there,

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so pretty much everything I'm gonna

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teach you will be applicable no matter

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which these platforms you're using.

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Now two general high level
differences right here.

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So if you click any of
these download buttons here,

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what you're gonna be
doing is you're gonna be

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downloading GNS3 and running it as

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what we call the Local Server option.

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So really what that means is

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that you're gonna be running GNS3

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directly on top of your operating system.

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It's no different than when you're

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opening up your web browser

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whether it be Google Chrome
or Internet Explorer,

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or you're opening up
your email application,

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or your instant messaging
chat application.

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All of those are examples of software

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that opens up and runs directly on top of

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your operating system
whether your operating system

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is Windows or Mac or Linux
or whatever it may be.

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So what's the other option?

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Well you can see down here,

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and I'll hover over this a little bit

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to make it a little bit larger,

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Download the GNS3 VM, virtual machine.

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What's that referring to?

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Well, if you're gonna use that,

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one additional dependency
in order to use that

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is to have some sort of VM software,

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like either VirtualBox or VMware.

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Now VirtualBox is free;

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VMware Player is free,

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and then there's other versions
of VMware that are not free.

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But you're gonna have to have either

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VirtualBox or VMware to use the GNS3 VM.

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Now you might be thinking to yourself,

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okay, well sounds like it'd be sort of,

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why would I go through
all that extra hassle

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to download the GNS3
VM that's gonna require

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these other software,
VirtualBox or VMware,

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when instead I could just bypass all that

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and just click Download
right here for Windows,

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or Download right here for Mac?

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So, why would I download the GNS3 VM?

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Okay, if your sole intention

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of using GNS3 is simply to build

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Cisco router and switch topologies,

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you just wanna practice Cisco routing

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and switching and that's it.

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Then that particular case,

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there probably is not very much of a need

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to download the VM, the GNS3 VM.

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You can probably just
run it as a local server

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by clicking Download right here.

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Where the GNS3 VM really comes into play,

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where it's really useful to you,

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is once you start getting into more

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advanced technologies
where you're gonna be using

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other operating systems like maybe

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June OS or something else like that,

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or maybe you wanna integrate other

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things into your topology,

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maybe for example you wanna integrate

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some sort of firewalls or
adaptive security appliances

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or some network monitoring
software applications,

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most of the time when you're doing that

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kind of fancy, extra, advanced stuff,

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you need to run that
alongside the GNS3 VM.

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It doesn't really work
when GNS3 is running

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as the Local Server option

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directly on top of your operating system.

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But if you're watching
this series of videos

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that's probably not your intent.

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You're probably watching this because

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you wanna create Cisco route
and switching topologies

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to help you prepare for
your CCNA and your CCNP,

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and even to some extent,
your CCIE as well.

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So in that particular case, just go ahead

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and click right here on Download.

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And then it will actually
download as you can see.

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I'll go ahead and make
that a little bit larger.

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Not very large, only about 43.6 megabytes.

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And as of the time of this recording,

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the current latest revision is 1.4.4.

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Okay, and then once you've downloaded that

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you can go ahead and
close up your browser.

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And then go to wherever that download was.

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In this particular case,

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I've placed my downloads here under,

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I'll go ahead and talk about these

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other things in just a second.

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Under GNS3.

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And here's the 1.4.4 all-in-one.

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So you can see what those
various flavors look like.

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And here's the GNS3 Virtual Machine,

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what that would look like.

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So I'm just gonna go
ahead and double click

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on that to open it up

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and let's go ahead and
walk through the process.

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Okay, I can close this.

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And so now we start entering
the GNS3 setup wizard.

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And yes, I wanna agree to the license,

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otherwise I can't use the software.

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Go ahead and hit Next.

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Now I just want to spend a little bit

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of time right now talking about this

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because you can see that,
in addition to GNS3,

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you're gonna get a whole
bunch of other stuff as well.

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Now all this by default is selected.

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You can unselect some of it,

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some of it is required.

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Generally the recommendation is

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just let it install all this stuff

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but if you're like me, you say,

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hey, I wanna know what each
one of these things is,

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what is it installing on my system?

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So let me just take a little bit of time

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to talk about each one of these.

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First of all, WinPcap, what is that?

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Well, right here directly
from WinPcap.org,

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basically, what WinPcap is, it's a driver.

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It's a driver that you
install in your laptop

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and what it allows your laptop to do is,

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if you've been studying networking at all,

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whether you're preparing for
your CCNA or anything else,

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you know that when your Ethernet cable

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is plugged into your laptop,

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yet that Ethernet nic on your laptop

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is seeing all kinds of Ethernet frames.

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Not necessarily just frames for you,

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frames for lots of other people

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connected to your broadcast domain.

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Now the default behavior
of your nic card is

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as every single frame comes in

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the nic card says, is this for me?

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Is this something I
need to pay attention to

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or is this not for me?

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If it's not for me, it just deletes it.

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It ignores it, and so the
CPU within your laptop

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never even sees that frame

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because it's not for you.

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But when you're doing
your network training

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and learning these protocols,

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a lot of times one of the best ways

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to learn protocols is to open up

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something called a packet sniffer.

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For example, Wireshark
is a classic example

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of a free packet capture tool.

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And the intent behind software like that

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is that you do wanna see everything.

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You wanna see every single frame,

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every single packet
that your nic card saw.

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Even stuff that isn't
necessarily meant for you.

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For example, if you wanna
connect the two routers

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and see routers doing EIGRP or OSPF,

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that's not for you, that's
not for your laptop.

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So if your nic card saw those packets,

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it would never display in
your packet capture tool,

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in your Wireshark tool,

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because it would never get to your CPU.

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That's where WinPcap comes into play.

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When you have WinPcap installed,

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it can put your network interface card

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into something called promiscuous mode,

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which is simply a fancy way of saying,

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hey, nic card, every
single thing that you see,

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send it to the processor. Every thing.

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So basically, the way all
this works hand in hand

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is that when you open up
your packet capture tool

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like Wireshark for example,

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Wireshark in turn invokes
the services of WinPcap.

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And Wireshark says, hey WinPcap,

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I'm a process running here,

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please put the nic card
into promiscuous mode

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and forward to me every single packet,

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every single frame that you see.

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So without WinPcap, your
packet capture tools

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would be pretty much useless

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because all they would be
able to display for you

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are packets leaving from your laptop

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or packets destined to your laptop.

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You wouldn't be able to
see all that other stuff

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you wanna see, like CDP and BGP and BTP

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and all that other stuff.

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So that's why we need WinPcap.

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What else is in here?

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Well, we've got Wireshark, so that's nice.

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Wireshark is a free download,

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but fortunately for us it's
already built into GNS3.

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Now if you already have
Wireshark on your laptop,

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don't worry, when it gets to this step,

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it'll say, hey, I already see it.

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And you can actually cancel out of it

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and cancel that section.

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The SolarWinds Response Time Viewer

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is a really cool tool.

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Basically what this
does, it's sort of like

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a high level tool that
sorts and categorizes

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and classifies your traffic.

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Because if you've ever
worked with Wireshark

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where it's capturing everything,

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within just like a minute
you can have thousands

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and thousands of packets just depending

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on busy your network is.

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As your scrolling through all that stuff,

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it can be kinda hard to see,

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if your overall question is
what's going on in my network?

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What are the typical types of protocols

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an applications are running right now?

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And what's the response time,

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when a packet comes out, how
fast is the reply coming back?

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I just want a sort of overview

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of what's going on in my network

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and with Wireshark, kinda
hard to get that information.

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Now of course there's
all sorts of filters and

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stuff built into Wireshark
to give you that information

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but with the SolarWinds
Response Time Viewer,

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it works hand in hand with Wireshark.

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So when you've got Wireshark running

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00:10:17,385 --> 00:10:19,468
and you stop and you got
all these miscellaneous

259
00:10:19,468 --> 00:10:21,274
packets that you've captured,

260
00:10:21,274 --> 00:10:23,543
you can save that Wireshark capture file.

261
00:10:23,543 --> 00:10:24,809
You can save it to your laptop

262
00:10:24,809 --> 00:10:26,267
or your hard drive or something.

263
00:10:26,267 --> 00:10:29,497
Then you can open up the
SolarWinds Response Time Viewer

264
00:10:29,497 --> 00:10:31,480
to view that capture file,

265
00:10:31,480 --> 00:10:33,615
and it gives you a real high level like,

266
00:10:33,615 --> 00:10:36,880
TCP conversations, HTTP conversations.

267
00:10:36,880 --> 00:10:39,089
It gives you a good snapshot of

268
00:10:39,089 --> 00:10:40,138
what's really going on in your network.

269
00:10:40,138 --> 00:10:42,878
So it's a really useful tool to have.

270
00:10:42,878 --> 00:10:45,039
Dynamips, gotta have that.

271
00:10:45,039 --> 00:10:47,382
So if we're running
GNS3 as a local server,

272
00:10:47,382 --> 00:10:48,715
in other words we downloaded it

273
00:10:48,715 --> 00:10:50,805
just like any other application

274
00:10:50,805 --> 00:10:52,938
and we're gonna run it
directly on our laptop

275
00:10:52,938 --> 00:10:55,109
just like any other software application,

276
00:10:55,109 --> 00:10:57,985
the Dynamips is a critical component.

277
00:10:57,985 --> 00:10:59,575
That is the emulator,

278
00:10:59,575 --> 00:11:01,287
that's the thing that's taking that Cisco

279
00:11:01,287 --> 00:11:03,815
software image that you're using

280
00:11:03,815 --> 00:11:06,541
and making the software image believe

281
00:11:06,541 --> 00:11:09,096
that it's really sitting
inside of a router.

282
00:11:09,096 --> 00:11:11,087
Dynamips is the emulation engine

283
00:11:11,087 --> 00:11:12,784
that emulates the router.

284
00:11:12,784 --> 00:11:15,714
Without it, the software
image wouldn't do anything.

285
00:11:15,714 --> 00:11:17,643
Cisco's software just
running on your laptop,

286
00:11:17,643 --> 00:11:19,463
you can't open it, you can't run it,

287
00:11:19,463 --> 00:11:21,666
because your laptop isn't a router.

288
00:11:21,666 --> 00:11:24,836
Dynamips makes the software believe

289
00:11:24,836 --> 00:11:26,255
it's operating within a router,

290
00:11:26,255 --> 00:11:27,979
so you gotta have that.

291
00:11:27,979 --> 00:11:30,536
QEMU stands for Quick Emulator.

292
00:11:30,536 --> 00:11:33,781
Quick Emulator, and as you can
see here in the description,

293
00:11:33,781 --> 00:11:35,434
a very useful thing for this is

294
00:11:35,434 --> 00:11:37,138
if you're using an adaptive
security appliance.

295
00:11:37,138 --> 00:11:37,971
So if you're studying for your

296
00:11:37,971 --> 00:11:40,888
CCNA security or you CCNP security,

297
00:11:43,272 --> 00:11:45,228
you're gonna have to know about

298
00:11:45,228 --> 00:11:47,266
adaptive security appliances
and firewalls and stuff.

299
00:11:47,266 --> 00:11:50,812
And that doesn't come with GNS3 by default

300
00:11:50,812 --> 00:11:53,054
so to get those sort
of security appliances,

301
00:11:53,054 --> 00:11:56,918
those firewalls, you have
to run them with QEMU.

302
00:11:56,918 --> 00:12:00,283
And QEMU is installed by
default as you can see here.

303
00:12:00,283 --> 00:12:02,491
VPCS, very useful.

304
00:12:02,491 --> 00:12:06,153
As you can see, it's the
virtual PC simulator.

305
00:12:06,153 --> 00:12:07,596
Lot of useful things you can do.

306
00:12:07,596 --> 00:12:09,681
So you can build a GNS3
topolgy of routers and switches

307
00:12:09,681 --> 00:12:13,677
and then drag and drop
these virtual PCs in there.

308
00:12:13,677 --> 00:12:15,894
And they're not running
a full blown version

309
00:12:15,894 --> 00:12:17,307
of Windows or anything like that.

310
00:12:17,307 --> 00:12:19,124
As a matter of fact, there's no GUI

311
00:12:19,124 --> 00:12:21,025
in these virtual PCs at all.

312
00:12:21,025 --> 00:12:22,717
But what you can do is you can have them

313
00:12:22,717 --> 00:12:25,066
start up TCP streams and UDP streams

314
00:12:25,066 --> 00:12:27,683
and ping back and forth
and do all kinds of

315
00:12:27,683 --> 00:12:29,364
really sort of cool stuff with them

316
00:12:29,364 --> 00:12:30,953
to test out your network,

317
00:12:30,953 --> 00:12:32,055
to see if your network is operating

318
00:12:32,055 --> 00:12:34,720
the way you thought it would operate.

319
00:12:34,720 --> 00:12:37,886
So it's a great that's built in here.

320
00:12:37,886 --> 00:12:42,053
CPU Limit. I actually have
something to talk about that.

321
00:12:43,728 --> 00:12:45,203
Here is CPU Limit.

322
00:12:45,203 --> 00:12:49,139
So this comes directly from
cpulimit.sourceforge.net

323
00:12:49,139 --> 00:12:51,222
so just real simple explanation,

324
00:12:51,222 --> 00:12:52,055
just like it sounds.

325
00:12:52,055 --> 00:12:53,382
It's an application, it's a program

326
00:12:53,382 --> 00:12:56,617
which attempts to limit the CPU usage

327
00:12:56,617 --> 00:12:59,253
of whatever application's using it.

328
00:12:59,253 --> 00:13:02,179
So in GNS3 is using CPU Limit,

329
00:13:02,179 --> 00:13:03,878
it limits the amount of CPU.

330
00:13:03,878 --> 00:13:06,233
So that's pretty clear there.

331
00:13:06,233 --> 00:13:08,624
So what else do we get?

332
00:13:08,624 --> 00:13:11,958
In addition to that,
well, there's GNS3 itself.

333
00:13:11,958 --> 00:13:14,023
That's the whole reason why you're here.

334
00:13:14,023 --> 00:13:17,210
SuperPuTTY is an example
of a terminal emulator.

335
00:13:17,210 --> 00:13:20,237
Now this comes packaged in with GNS3.

336
00:13:20,237 --> 00:13:22,557
If you're wondering what
is a terminal emulator,

337
00:13:22,557 --> 00:13:25,799
well, the terminal
emulator is the software

338
00:13:25,799 --> 00:13:27,527
that gives you the command line.

339
00:13:27,527 --> 00:13:29,506
So for example, in order to get into

340
00:13:29,506 --> 00:13:32,180
the command line interface
of a router or a switch

341
00:13:32,180 --> 00:13:34,669
so you can see your commands
and type in your commands,

342
00:13:34,669 --> 00:13:38,108
the software, the front end
that's giving you that window,

343
00:13:38,108 --> 00:13:40,111
is called a terminal emulator.

344
00:13:40,111 --> 00:13:42,515
And there's lots of different applications

345
00:13:42,515 --> 00:13:44,311
that are terminal emulators.
SuperPuTTY is one.

346
00:13:44,311 --> 00:13:47,978
HyperTerminal is one
you may have heard of.

347
00:13:47,978 --> 00:13:50,506
SecureCRT is another one.

348
00:13:50,506 --> 00:13:53,016
So by default, GNS3 uses PuTTy.

349
00:13:53,016 --> 00:13:56,235
But if you prefer
SecureCRT or HyperTerminal

350
00:13:56,235 --> 00:13:57,346
or something like that,

351
00:13:57,346 --> 00:13:59,368
I'll show you in an upcoming video

352
00:13:59,368 --> 00:14:02,605
how you can change GNS3
to use the terminal

353
00:14:02,605 --> 00:14:04,851
emulator that you want to use.

354
00:14:04,851 --> 00:14:07,489
And then lastly we have
TightVNC Viewer right here.

355
00:14:07,489 --> 00:14:09,939
I'm not really gonna into
great detail on that.

356
00:14:09,939 --> 00:14:13,531
That's definitely more of an
intermediate/advanced topic.

357
00:14:13,531 --> 00:14:14,667
But this is basically a way that

358
00:14:14,667 --> 00:14:17,029
if you have GNS3 running on one system

359
00:14:17,029 --> 00:14:18,250
and you're on a different system,

360
00:14:18,250 --> 00:14:20,820
maybe across town or across
the state or something

361
00:14:20,820 --> 00:14:23,574
you can still bring up
the GUI on your system

362
00:14:23,574 --> 00:14:25,715
even though the actual GNS3 server

363
00:14:25,715 --> 00:14:28,114
is running on a different
laptop or different server

364
00:14:28,114 --> 00:14:30,023
that's physically different than

365
00:14:30,023 --> 00:14:31,842
the one that you are on right now.

366
00:14:31,842 --> 00:14:34,906
So TightVNV Viewer allows you to do that.

367
00:14:34,906 --> 00:14:36,405
So we're just gonna go ahead and install

368
00:14:36,405 --> 00:14:39,096
all that stuff and click Next.

369
00:14:39,096 --> 00:14:41,714
And let it install into the default

370
00:14:41,714 --> 00:14:44,338
directory where it wants to go.

371
00:14:44,338 --> 00:14:46,033
Alright now, right now I'm
getting a little warning saying,

372
00:14:46,033 --> 00:14:48,656
hey, WinPcap is already on this machine.

373
00:14:48,656 --> 00:14:50,235
In this case, I'm just
gonna cancel out of it.

374
00:14:50,235 --> 00:14:52,249
Now if you don't get this,

375
00:14:52,249 --> 00:14:54,528
remember you definitely
want WinPcap to be installed

376
00:14:54,528 --> 00:14:57,469
but my case, I've already
got it right here,

377
00:14:57,469 --> 00:14:58,986
so I'm just gonna cancel out of that

378
00:14:58,986 --> 00:14:59,906
'cause I don't need it to be installed

379
00:14:59,906 --> 00:15:02,444
or overwritten what I've already got.

380
00:15:02,444 --> 00:15:04,474
Now same thing. Wireshark.

381
00:15:04,474 --> 00:15:06,405
If I sat around here for
like a minute or two,

382
00:15:06,405 --> 00:15:07,296
it would download Wireshark.

383
00:15:07,296 --> 00:15:09,742
But I'm gonna cancel that

384
00:15:09,742 --> 00:15:11,360
because I've already got
Wiresharked installed.

385
00:15:11,360 --> 00:15:14,373
I don't need to install it again.

386
00:15:14,373 --> 00:15:16,231
SolarWinds Response
Time Viewer, once again,

387
00:15:16,231 --> 00:15:18,745
I'm gonna cancel out of that
because I already have it,

388
00:15:18,745 --> 00:15:22,127
I downloaded it prior to this video.

389
00:15:22,127 --> 00:15:24,882
So, I'm gonna abort that installation.

390
00:15:24,882 --> 00:15:26,951
And now it's just gonna
download everything else.

391
00:15:26,951 --> 00:15:30,034
All that other goo stuff that I need.

392
00:15:31,731 --> 00:15:35,631
And as you can see, doesn't
take a whole long time.

393
00:15:35,631 --> 00:15:37,281
And that's it.

394
00:15:37,281 --> 00:15:38,114
Next.

395
00:15:39,579 --> 00:15:40,456
Now you're prompted, would
you like to get to get

396
00:15:40,456 --> 00:15:43,966
your free license of the
SolarWinds standard tool set?

397
00:15:43,966 --> 00:15:46,096
Hey, definitely wanna click Yes here

398
00:15:46,096 --> 00:15:47,791
because as you can see it's a $200 value,

399
00:15:47,791 --> 00:15:51,197
you get it for free, hey, why not, right?

400
00:15:51,197 --> 00:15:52,554
And now when you click Next,

401
00:15:52,554 --> 00:15:54,471
it'll actually bring up

402
00:15:56,165 --> 00:15:59,322
the SolarWinds website
here where you can register

403
00:15:59,322 --> 00:16:01,472
to get that free tool set.

404
00:16:01,472 --> 00:16:03,366
I'm not gonna do that right now.

405
00:16:03,366 --> 00:16:07,487
And then lastly prompts you to start GNS3.

406
00:16:07,487 --> 00:16:10,583
You'll be directed to
the GNS3 welcome page

407
00:16:10,583 --> 00:16:14,114
where they kindly give you their gratitude

408
00:16:14,114 --> 00:16:15,454
for downloading the software,

409
00:16:15,454 --> 00:16:17,688
and at this point, we are now into

410
00:16:17,688 --> 00:16:20,352
what's called the GNS3 Setup Wizard.

411
00:16:20,352 --> 00:16:23,190
Now I'm gonna go into that
in the next couple of videos.

412
00:16:23,190 --> 00:16:24,377
I'm gonna walk you through step by step

413
00:16:24,377 --> 00:16:26,230
of how to use the setup wizard

414
00:16:26,230 --> 00:16:28,035
and what your various options are.

415
00:16:28,035 --> 00:16:30,550
But this point, we have
successfully located

416
00:16:30,550 --> 00:16:34,219
the GNS3 software on the
internet on the GNS3 website,

417
00:16:34,219 --> 00:16:36,453
we have downloaded it to our laptop,

418
00:16:36,453 --> 00:16:40,036
and we have begun the
installation process.