In this video, we get to do the planning
for the GRE, the generic route encapsulation tunnel
that we want to build between site one and site two.
Let's go to the whiteboard, and let's put a plan together.
And here we go.
So for our tunnels, our GRE tunnels,
let's plan on using for both sites,
let's go to use tunnel interface, number zero.
And for the tunnel itself, we're going
to go ahead and start the tunnel from this reachable address
of 15.1.1.1 to 25.2.2.2.
So I will go ahead and put little arrows there. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
So I will go ahead and put little arrows there.
Say those are the IPs for the start and end of the tunnel.
And for the actual network address
on the tunnel interfaces, let's go ahead and use 10 dot,
and it's routers one and two, so let's use 10.12.12.0
with a 24-bit mask in on R1.
We'll call it dot one, and on R2, we'll call it dot two.
And then one last thing what we definitely want to do
is we want to make sure that right now R1 has a default
route that goes that way.
R2 has a default route goes that way.
If we get a packet source from 10.1, WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
If we get a packet source from 10.1,
PC1, that's going to 10.2, we want
the router to use the tunnel interface and not
its default route.
So to accomplish that, let's go ahead and add EIGRP.
And we'll use autonomous system one,
and let's only include the ten networks.
So in our network statement, we'll
say 10.0.0.0 with a wildcard mask saying we only care
about matching on the first octet of 10.
And so that ten will do a couple things for us.
One, it'll include these networks over here
at site one and site two. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
at site one and site two.
It'll also include the interface, the GRE tunnel
interface that starts with ten.
So we want to have that enabled so that they'll be
able to talk with each other.
Now we don't want to cause recursive routing,
where R1 thinks that to get to the other end of the tunnel,
it should use the tunnel itself.
That's a problem.
So I'm not going to include any of the public address space
here in my EIGRP.
It's just the private address space
on the inside of each site and also on the tunnel interface,
and I think that's all we need to do.
So with that plan in place, our next step is to configure it, WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
So with that plan in place, our next step is to configure it,
and that's exactly what we're going to do in the next video.
We'll configure the GRE tunnels, the routing protocol, EIGRP,
and we'll verify that it works.
I'll see you in the next video.
Meanwhile, I hope this has been informative for you,
and I'd like to thank you for viewing.