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- So in the next several videos I'm gonna be bringing
much of what we learned into focus by building some labs,
and these are labs that you can follow along with
and you can try to build yourself as well.
So these are gonna be CCNA level labs,
so I'm gonna try to keep it constrained
to just stuff that you would need to know
for the CCNA routing and switching exam.
So to begin with, we're gonna start by building
a CCNA EIGRP level lab.
Now if you're building your own labs,
before you get onto GNS3 or anything else,
you should always do the same set of steps,
the very first step you should do
is write down on a piece of paper
or open up Notepad or something and write out
what the objectives are that you want for your lab.
What do you want to learn, what do you want to practice?
That way you don't end up going off into never never land
and never get around to what you actually meant
when you started the lab in the first place.
So that being said, I've created some initial
objectives here for this lab.
We're gonna start with four routers,
we're gonna create some redundant paths,
so we're gonna create some paths that are really fast
and some paths that are really slow,
because part of the CCNA routing and switching
is they expect you to know how EIGRP selects
its best path and what you can do
to force it to choose an alternative path,
and that's one of the things
we're gonna be doing here as well.
We're also, to that end, we're gonna be using
serial and Ethernet links in our topology.
So we're gonna configure EIGRP such that all the routers
are in the exact same autonomous system.
Two of those routers are gonna form a neighbor relationship
using EIGRP authentication, because you need to know
how to configure that and troubleshoot that for the CCNA.
The end routers, the routers at either end of the topology
should use the slow speed link
by the time we're all done,
so if they're pinging each other,
they should go across the slow speed link,
so you're gonna have to manipulate
EIGRP to accomplish that.
And we're also gonna use the built-in Wireshark feature
of GNS3 to actually capture some of the packets
so we can see what the neighbor relationship looks like
when it's being built and how EIGRP routers exchange routes.
So that being the case, that is the objectives
for this lab, and I have worked up here,
this is the topology that we're gonna end up building.
I'll make this a little bit larger.
So this is what I'm gonna create,
and I've put in the IP addresses here,
I've put in a couple of loop-backs so that we can
ping each other, and this is what we are going to build.
So at this point, if you want to try to recreate this
yourself, I'm gonna bring this video to a close right now.
Before you start up the next video,
go ahead, try to build this if you can,
and get it working so that when, for example,
pings initiate from router one
and they're pinging the loop-back of router four,
they should take the slow speed serial link
both there and back on the reply.
So at this point I'm gonna go ahead and close off this video
and in the next four or five videos
I'm gonna go through the process of actually
building this and making it work.
So if you get stuck anywhere along the way,
you can go to some of those other
videos and see how I did it.
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