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(upbeat music)

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- In this section, I'd like
to continue our discussion

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about how to determine
what IOS software image

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is appropriate for you to use,
not only from the standpoint

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of what's appropriate that
can actually run within GNS3

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but will support the features
and protocols that you want

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to practice in your lab.

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So that's why I've titled
this particular section

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Feature Sets, because that's
what we're really gonna

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focus on in here right now.

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So you know at this point
you need to somehow get ahold

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of some CISCO IOS software.

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We've already talked a little
bit about what software is

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runable, or that you can do within GNS3.

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There are certain platforms
that GNS3 can emulate,

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other platforms that it can't.

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So we've already talked about that.

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So the next thing is, once
you've identified the platform

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that you want, now you have to figure out,

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if you have a choice
that is, what feature set

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you want to use for your particular lab

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that you want to create or
what feature set of software

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you want to import into GNS3.

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In order to do this, like I
mentioned in a previous video,

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the thing you're gonna want
to go as we see right here

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the Cisco Feature Navigator.

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Now before we go to all these
bells and whistles here,

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I always recommend if
you can get ahold of it,

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if you can get your hands on
it, no matter what platform

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you're dealing with or
what version of software

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you're dealing with 12.3, 12.4, 15.2,

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if you can get your hands
on Advanced Enterprise,

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that's where the big, beefy
IOS software that covers

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everything, that's always
pretty much a surefire bet

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that that will cover the
features and protocols

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that you want to test.

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So even without going to
the Feature Navigator here,

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if you have access to some
sort of advanced enterprise

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flavor of Cisco IOS, 99.9% of the time

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that version will do whatever
it is that you need to do

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in your GNS3 lab.

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But for the purpose of explanation,
let's say that you don't

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have that exact image
and you have to choose

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from some other ones.

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Okay, so from here, right
from the Feature Navigator,

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once again how you get to
this, well, you can just

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start Google and just type
in Cisco Feature Navigator

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and you can see right
there it comes right up.

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You can click on it,
and notice on the upper

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right-hand corner here that
I'm not even logged in.

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Right, it says Log In, so you can access

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this Feature Navigator even
without a Cisco login at all

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which is kinda nice.

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So from here you'd click
on down here where it says

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Research Software.

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So click on that.

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In my particular case, I'm
gonna do it based on Platform.

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I know that I want to use a 3725 or a 3745

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because I know that that particular model,

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among a couple of others, also supports

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the EtherSwitch Module.

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So I can use that router for
both switching and routing.

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And I'm gonna select IOS.

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My Platform in this particular
case, I'm gonna scroll down

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through the available options.

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Well, it usually gives me
some available options here.

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There we go, it's a little sluggish today.

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So I'm just gonna find in my
list here, let's say 3725,

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and I'll just pick a version,
whatever is available

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here in this list.

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Once again unfortunately
their website or possibly

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my browser is a little sluggish.

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There we go, alright.

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Let's do 12.4T.

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And for the Release, how about I'll just

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pick one here, (11)T8.

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And now for the particular
feature, so let's just pick one

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out of the hat here just to check.

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So let's say I did IP Plus.

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So it's gonna search for that version

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and that particular feature set.

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I don't even know if that
particular feature set

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is available on this
but, yup, clearly it is.

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So there we go, and down
here in this section,

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right now it's thinking about it,

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it lists all the features and protocols

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that this particular software supports.

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And you can see there's
quite a bit of stuff

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but notice there's also a
lot of stuff that's missing.

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I mean for example, this
thing right down here says

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Page 1 of 1, so there are no more pages.

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So whatever features you
see in this list here

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that is what is what you
can do with this particular

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flavor of Cisco IOS software.

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Now there's still a lot.

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Okay, so if I scroll
over a little bit here,

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now I can scroll down a little bit

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and see more options.

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So let's just expand my
browser window a little bit,

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maybe fit some more stuff in there.

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Okay, that looks a little bit better.

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So let's say I'm going
through this list here,

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and I say okay, I see a lot of stuff.

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I see BGP.

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You know I can see in here
CEF, Cisco Express Forwarding.

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I can do some QoS stuff,
Class-Based Marking,

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so even this particular
feature set, if this was all

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you had available which was IP Plus,

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still a lot of stuff you can do in here.

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So if you plan on creating a
GNS3 lab and you're wanting

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to test a particular thing,
a particular feature,

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find the software in
here first and make sure

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that this software you're
about to get your hands on

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will support the feature
that you want to accomplish.

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There's nothing more
frustrating than going through

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the hassle of obtaining some
Cisco IOS software image,

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only to discover, hey, I
wanted to test out Multicast

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and this particular
software doesn't support it.

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I'm trying to type in Multicast
commands and it's giving me

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an error message.

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It doesn't recognize the commands.

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So you've gone through all that hassle

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to download some software,
and the command line

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doesn't even recognize the commands

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because you're trying to
activate some feature or protocol

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that's not available in
that particular software.

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So be aware of that.

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If you are one of those lucky
people that have a choice

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of what Cisco IOS software
to download and use

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within GNS3, this is one of
the things you're gonna have

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to think about, finding the
appropriate feature set.