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(intense music)

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- Okay so let's start Part 1 of this lab

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by actually bringing up
GNS3, naming our project,

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and then importing our various nodes,

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dragging and dropping
them where they need to be

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and then connecting them
via the add a link tool.

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So let's go ahead and start doing that.

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So if you haven't already done so,

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I would recommend that
you take a screenshot

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of this image so that you
can follow along with me here

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because I'm gonna move this off

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to my other screen as I work.

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Okay, so let's go ahead and start GNS3

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and we will name this project.

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You can name it whatever you want,

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I'm just gonna name it CCNA-Switch-Lab.

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And then I'll save it.

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Okay, so let's start
building this up here.

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According to our topology
we need three routers.

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Let's go ahead and drag
and drop those into place.

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One, and I'll just use this Shift key here

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to drag and drop two more.

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Alright.

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There we go.

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Okay, we're also gonna
need an EthernetSwitch node

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so that'll be over here in the
section on browse switches.

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So there we go, EthernetSwitch.

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Drop that into place.

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But currently, we don't
have the EtherSwitch router

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that has the EtherSwitch module in it

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so I need to add that.

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So what I'm gonna do is I'm gonna go here

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under Edit, and Preferences.

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Edit, Preferences.

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And then here under Dynamips
I'll select IOS routers,

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and then I'll select New.

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I'll use the same image I'm already using

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but this time I'm gonna
select the EtherSwitch box.

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I'm gonna give it the
appropriate amount of memory

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which I think is 256 megabits per second

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according to Cisco's feature navigator.

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And I'm not gonna populate
any of the other slots,

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I'm just gonna leave it with
the 16 port EtherSwitch module

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because I don't need to use
this thing as a router at all.

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And then lastly I wanna
compute the idle PC value.

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This'll take about a minute,
maybe a little bit less.

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There we go, we have an
idle PC, so let's OK that

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and Finish,

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Apply, OK.

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And now we should have available to us

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our EtherSwitch router,
so let's drag that,

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hit the Shift key, let go, and
yes, I do want two of them.

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Alright, let's go ahead
and add in our links.

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So Router 1 will use his FastEthernet

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and that's gonna end up being our trunk

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and we'll connect that
to FastEthernet1/0 here.

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Now remember, because
these EtherSwitch routers

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are routers, they are 3725s, the first one

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or possibly two interfaces are
actually routed interfaces.

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They don't do switch port
commands or spanning tree

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commands or anything like that.

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So for the purposes of
this lab, we're gonna stay

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away from those first two interfaces.

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Okay now let's go over here
to Router 2, same thing,

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connect his FastEthernet to
the first switch port on here.

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Okay, now let's connect our
redundant links up here,

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so we'll start at the
bottom, FastEthernet1/15

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will go to FastEthernet1/15
and FastEthernet,

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let's just say, 1/9 will
go to FastEthernet1/9.

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Alright so we're almost done.

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Now before we start connecting
stuff up to the switch,

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the EthernetSwitch, there's a problem.

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Because if I right click
on this and hit Configure

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to see what it currently
is, all of its interfaces

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are access ports, and
they're all in VLAN-1.

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And as we talked about when
we first introduced this node,

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you can't change the characteristics

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of an existing interface.

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You either have to delete that interface

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and then recreate it with
the characteristics you want,

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or add a brand new interface
so what I'm gonna do is

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I'm just gonna delete all of these.

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Alright, that looks alright.

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And now, remember, according
to our diagram here,

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we needed to have a
total of three interfaces

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on that Ethernet Switch Node.

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One of them had to be 802.1q,

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one of them had to be an
access port in VLAN-2,

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and the other one had to be
an access port in VLAN-3.

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So we need to be aware of that

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as we create these
interfaces from scratch.

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So here we go, I'll have interface 1

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be my access port in VLAN-2.

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I'll have interface 2 be
my access port in VLAN-3.

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And I'll have interface
3 have a native VLAN of 1

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and be an 802.1q trunk.

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Apply, OK, now before I forget,

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I should write that on my diagram.

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So this is interface
1, this is interface 2,

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and this is interface 3, alright.

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Now when you do it in your own lab,

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you can use whatever
interface numbers you want,

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but it is important that
you have the dot1q trunk

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and the VLANs where
they're supposed to be.

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Alright so let's go ahead and
connect our interfaces here

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so Router 3 connect his
FastEthernet port to port 3,

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which is my trunk.

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Router 2 connect
FastEthernet0/1 to port 1,

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and connect FasteEthernet1/0 to port 2.

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Alright, and that completes
our physical connection.

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Everything is where it needs to be now

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so at this point I can minimize that.

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And I can zoom in a little
bit to see a little bit more.

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Now before I finish
this off, let's go ahead

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and click on the
Show/Hide interface labels

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so that we know which
interfaces are where.

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And of course they get a little bit sloppy

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especially when some of these interfaces

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are so close to each other.

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Okay so this is why I drew
everything on my white board

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because I know that 1 is here, 2 is here,

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that's like that, and...

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Now I don't remember which
interface on Router 2

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connected to the switch but
fortunately I can just hover

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over Router 2 and it'll tell me.

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It says that FastEthernet0/0...

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Let's see here, here we go.

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FastEthernet0/1 is
connected to port 1, okay

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so FastEthernet, let me
just hover over that again

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in case you couldn't see it.

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You can notice down on the bottom.

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Well, it got rid of that
when I entered this tool,

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but you can see it right there.

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Come on, come back up.

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There it is, FastEthernet0/1 is connected

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to switch 1 on port 1,
that's what I needed to see.

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So 0/1 goes up here, 1/0 goes down here,

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let's just move his name off
to the side a little bit.

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Okay, and if we go up here,

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we just know these numbers
match on both sides.

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Okay, and that concludes this section

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on building the physical topology.

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(intense music)