In this lab, you need to configure a grid tunnel.
We now need to configure a geo tunnel between customer rather one and two so that the PCs can ping each
other.
So on customer roster one.
We going to create a tunnel interface?
We'll use zero as the tunnel number IP address that we'll use is ten one, two, three, one slash 24
mosque.
In the real world, you probably want to use a slash 30 mask to conserve IP addresses, but we don't
need to worry about that for the lab.
We then need to specify a tunnel source.
In this case, the tunnel source will be gigabit 001.
Now you don't have to use the local interface as the source.
You could specify the local routers IP address if you want to, but I've used the interfaces in this
example.
The tunnel destination will be the rudder on the other side, which is router two.
Now in this lab, the routers are using DHCP addresses on the internet facing interfaces in the real
world.
You're going to want to use static IP addresses because if these addresses change, your tunnels will
break.
But that's okay for this lab.
The tunnel interface has come up because the local router has IP reachability to the destination.
That doesn't mean that the tunnel is going to work because we need to still configure the other side.
So the tunnel is up now en route.
A two interface tunnel is zero.
IP address to use this ten 132 slash 24 mosque tunnel source is going to be the local interface gigabit
001 tunnel destination is going to be customer router one.
With IP address eight eight, ten two tunnel has come up on the side.
So can we ping ten 131?
In other words, can we ping from the local tunnel interface to the remote tunnel interface?
It took it a while, but that's working now.
So ping ten, one, two, three, two.
We can ping from this tunnel interface to this tunnel interface and back again.
But notice that the KOL routers don't know about that network, so show IP route.
This router only knows about network eight.
It doesn't know about network ten.
The traffic is being encapsulated on the internet.
So what we've done thus far is configure a geo tunnel.
The two routers can ping each other, but we now need to advertise these networks via copy.
Otherwise the routers will not know.
About the internal networks behind the other router.
As an example, router two knows about.
Network ten one to this network ten 130.
The tunnel.
Subnet.
But it doesn't know about network ten 110.
Customer.
Writer one.
Also knows about ten 130.
It knows about ten 110, but it doesn't know about network ten 120.
So we need to configure ERP and autonomous system 100.
So I'll do that.
And enable Ian GOP on Network ten and disable automatic summarization.
We were told to use IGP as the routing protocol.
And rather to do something similar, wrote a GOP 100 Network ten Note Order Summary.
And as you can see there, a neighbor relationship was established.
We've got a new adjacency.
So on router to show IP your neighbor we've got a neighbor relationship to customer router one through
the tunnel show IP route.
This router has now learnt about network ten 110.
So it should be able to ping ten 111, which it can.
So right a two can ping this IP address through the tunnel.
Notice the difference when I do a trace.
So trace to ten 111.
We don't see the internet routers.
It looks like these two routers are directly connected to each other, which they logically are through
the tunnel.
En route a one.
Show IP job neighbor neighbor relationship to write to show IP route.
It can now see this network through the tunnel.
So it should be able to ping ten 1 to 1, which it can.
So we have IP connectivity between the two routers.
Can the PC ping each other?
So this is PC one.
And here's PC to.
Ten PC one ping ten.
One, two, two.
Let's see if that works.
It took it a while.
But notice now the pings succeed.
And we should be able to trace to that PC and notice we only see three hops, this router, this router
and the remote PC.
Because the internet routers are hidden.
Traffic is being forwarded through the logical tunnel.
So can this PC ping PC one?
Yes, it can.
So the PC on the right can ping the PC on the left.
So we've successfully configured this network so that the PC can ping each other and the routers can
ping each other through the tunnel.