See history history show IP protocols shows me that no protocols are enabled.
So no routing has been enabled on this road.
Rodda on GOP 100 network some guinea Nabl your job on the Seemed to face ten not one but one hundred
twenty five three and I'll do this specifically down to IP address using an inverse mosque.
So I'm only going to enable your GOP on this interface.
Noticed two neighbor relationships have been established rodder three has a neighbor relationship established
to switch one over here as well to switch to shown over here.
The reason why it forms a neighbor relationship with both switches is because rotatory is connected
to villaine one.
So there's a layer to connection all the way through to switch one misrouted once again doesn't exist
in the typology.
It simply represents a virtual HAARP router so that rodded doesn't actually exist in the topology at
all.
Router 3 once again has a connection to switch one as well as switch.
So hence it forms a neighbor relationship with both so to show IP your GOP neighbor we can see two neighbor
relationships both formed on fast.
Ethan it 00 to show IP protocols.
We can see as an example that it's routing for this network and it's got to Gateway's what a medic summarization.
However on this router is enabled by default.
So I'm going to type no order summary to disable automatic summarization the neighbor relationship reconfigures
and we can see that automatic summarization is now disabled to show IP route.
We can see that the Rodda has learnt about two routes through the GOP.
It's learnt about network 10.0 wonder 10.0 via both switches and it's learnt about network tended.
Wonder 20.00 from both switches.
So in other words the router has two ways to get to Vilain 10 and violent 20.
Now let's test some connectivity on Route 1 which is this device of a
show IP wrocht which has a default gateway pointing to the aitches or Pirata.
And in this case
switch one should be the active router for HAARP on that Villon so on land 10 the local Rodda is the
active router.
So switch one is acting as the active rotifer p.
So let's check if Rotto one acting as PC one can ping of a villain addresses attended one at 100 to
1.
Is it able to ping.
Vigeland We land one on switch one and it can in this example what about 2 5 3 router 3.
So this router can now paying this IP address on rotisserie let's add a network to the topology I'll
create a loop back on router three of quadruple three.
Can this PC ping that address and at the moment it can't it's getting unbreachable messages let's see
from who.
So de-bug IP ICMP to that ping again.
Rodders 3 is getting an unreachable message from $10 one to $10 one.
In other words switch one switch.
One doesn't know about quadruple three.
So this Rodda acting as a PC is forwarding the traffic to DHS or the virtual router that traffic is
being forwarded by one.
But which one doesn't know about the loopback that we configured on router 3 and that's because that
router is not being advertised in your job.
And we can see that by using the command to show IP protocols only network 10 is being advertised.
It could also look at the running config so do show run pipe section III GOP.
We have only enabled the GOP on this interface.
We didn't enable the GOP on the loopback of router 3 so router 3 router GOP 100 network quadrupled three
and I will matchwood exactly so show run S..
Yeah GOP.
We have now advertised that network in the GOP does which one now know about that network.
So show I.P rant on which one.
Yes it does.
It's learning about that network from tendered one at one hundred twenty five three which is routed
3.
So can Radu one acting as our PC now paying quadruple three previously.
This didn't work.
But notice now it does work.
So the ping succeeds debugfs just showing that output to the ping again Rodda one is now able to ping
Rodda three via.
And the important piece of via its HAARP default gateway can route to acting as PTT ping that loop as
well.
So let's test that his route to share IP route.
Notice no rants are shown because on this router I disabled
IP routing.
So show run pipe include IP raht.
Notice the IP routing command is disabled.
So just to show run without piping so that you can see where it is in the config.
Notice no IP routing is disabled on the router.
So what we did in a previous video is specify a default gateway so this command was added to the configuration.
Show run piping to default allows me to see that.
So this router is now acting as a PC and it can also paying the loopback the IP default gateway command
is only used to an IP routing is disabled on a router.
If you have IP writing enabled then you need to use the IP route command to create a default gateway
like we did here on Route 1.
So basically we now have full connectivity between these devices in the topology.
The route is comparing Route 3.
The next step is to advertise the default route in router 3 so that these two switches have Rodda 3
as they default gateway and we need that because we want to configure Nat on router 3 to allow these
devices to connect to devices on the Internet.