All language subtitles for Free-CCNA-Configuring-OSPF-3-Day-28-Lab-CCNA-200-301-Complete-Course_en

This is a free, complete course for the CCNA.

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Also, remember to sign up via the link in\n

for this course, so you can try it out yourself\n

If you want more labs like these, I highly\n

the CCNA, click the link in the video description\n

It’s a network simulator like packet tracer,\n

of these guided labs to not only help you\n

but also deepen your understanding of the\nexam topics.

I used it myself when studying for my certifications,\n

If you want to get your own copy of NetSim,\n

Also watch until the end of this video for\n

In this lab we’ll do a bit of OSPF configuration\n

Most of this network is pre-configured, except\nfor a few things.

However, there are a few misconfigurations.

So, let’s complete the configurations and\n

By the way, because there is troubleshooting\n

yourself before watching this video.

If you see my solutions to the problems you\n

First up in step 1, we have to configure this\n

configure OSPF on both routers.

Note that R2 already has OSPF enabled on its\n

First I’ll check the interfaces.

Okay, so G0/0 is already configured, but S0/0/0\nis not.

IP ADDRESS 192.168.12.1 255.255.255.252.

Now, the \ninstructions say to set a clock rate of 128

We have to do that on the DCE side.

As you can see, R1 is the DCE, so let’s\nset the clock rate.

Finally I’ll enable the interface.

Okay, now I’ll configure R2’s end.

Like R1, its G0/0 interface is already configured,\n

IP ADDRESS 192.168.12.2 255.255.255.252.

We already know this is the DTE end, since\n

Okay, let’s enable the interface.

Now let’s enable OSPF on the interfaces.

First here on R2, let me see if OSPF is running.

Okay, OSPF is running, and it’s enabled\non the G0/0 interface.

Since I’m already on the S0/0/0 interface,\n

By the way, in a real network I’d recommend\n

directly on the interface, or using the NETWORK\n

Now both configuration methods are mixed on\n

Okay, now I’ll enable OSPF on R1.

First let’s check if OSPF is enabled.

Again, I’m already on the interface so let’s\nenable it here.

DO SHOW IP OSPF INTERFACE S0/0/0.

Notice the network type of point-to-point\nis enabled by default.

That’s because this is a serial interface,\n

Also notice that there is no mention of DR\n

network type doesn’t use the concept of\nDR and BDR.

The default Hello and Dead timers are 10 and\n

Because this is an Ethernet interface, the\n

Because there are no other routers connected\n

Okay, finally let’s see if R1 is learning\nOSPF routes.

So, R1 has learned two routes from OSPF, to\n

R4, and the 192.168.245.0/29 network between\nR2, R4, and R5.

There are some missing routes, so let’s\n

First up, in step 2 it says that only R3 has\n

Well, as we just saw R1 indeed does not have\n

What could prevent the other routers from\n

For example, perhaps R3 and R4 aren’t successfully\n

As you can see here, R3 and R4 do have a full\nOSPF adjacency.

Is R4 learning a route to 10.0.2.0/24?

So, think back to the lecture video.

What could cause R4 to fail to learn a route\n

R4’s G0/1 interface is using the default\nbroadcast network type.

So, R3’s G0/1 is using the point-to-point\nnetwork type.

For a point-to-point connection between two\n

the point-to-point network type, even though\n

However, when there is a mismatch like this\nproblems will occur.

I’ll remove the point-to-point configuration\nhere on R3.

NO IP OSPF NETWORK POINT-TO-POINT.

Okay, let’s see if R4 has learned the route.

To test if OSPF is working for this part of\n

Okay, the ping works, so R1, R2, R3, and R4\n

Now let’s check step 3, which states that\n

We just checked R4’s neighbor table and\n

Let’s check some of the settings on the\n

Here on R2, DO SHOW IP OSPF INTERFACE G0/0.

The IP address is correctly in the subnet,\n

Those are some basic settings that could cause\nproblems.

R4’s interface is in the subnet, is in area\n

R2 and R4 seem fine, so perhaps the problem\nis on R5.

The interface is in the correct subnet, in\narea 0.

Hello timer of 5 and Dead timer of 20.

These don’t match R2 and R4, so R5 won’t\n

Let’s return R5’s timer to the default\nsettings.

Okay, now I’ll click this arrow here to\n

now let’s check R5’s neighbor table.

Okay, now R5 is OSPF neighbors with R2 and\nR4.

The next problem is that PC1 and PC2 can’t\n

So, R5 is connected to the Internet and should\n

But when checking the routing table of each\n

To confirm, I’ll try a ping from PC1.

Let’s see if R5 is advertising its default\nroute.

DO SHOW RUNNING-CONFIG | SECTION OSPF.

The DEFAULT-INFORMATION ORIGINATE command\n

5, AS-External LSA to the other routers.

But perhaps R5 doesn’t have a default route?

There is no default route to advertise.

IP ROUTE 0.0.0.0 0.0.0.0 203.0.113.2.

Okay, now R5 should create that Type 5 LSA\n

and PC2 should be able to ping the external\nserver.

I’ll go check R1’s route table.

There it is, it learned the default route\nfrom R5.

So, I’ll just try a ping from PC1.

Okay, PC1 can ping the external server.

Finally let’s check the LSDB.

Remember that all routers in the area will\n

So, these router link states are Type 1, each\n

The Network link states are Type 2, the DR\n

Finally there is one Type 5 AS External LSA,\n

There are many more LSA types than this, but\n

Okay, that’s all for this lab.

Now let’s move on to take a look at a lab\n

Okay, here's today's Boson NetSim practice\nlab, OSPF Routes.

So, this is a fairly short and simple lab.

As I've said in the past, there is quite a\n

Some of them are larger, more complex, more\ndifficult.

And some of them are simpler, like this one.

Learn the commands needed to test an OSPF\n

Here are the commands you need to know.

These are all commands you already know.

The IP addresses of each device.

There are only six short steps in this lab,\n

Step 1, configure Router1 with the appropriate\n

should be the DCE side of the serial connection\n

I'm already in the CLI of Router1, as you\ncan see here.

Then the IP addresses, so let's check the\nchart here.

Now the lab instructions say that this is\n

And it says right here, DCE cable.

So let's set that clock rate of 64 kilobits\n

Okay, and enable the interface.

Next, task 2 is to do the same on Router2.

So, to open the CLI of Router2, I click on\n

to open a console connection.

And then the serial interface.

I'll just check that this is DTE.

It should be, because Router1 was DCE, but\nlet's make sure.

Okay, so let's configure the IP address.

Okay, let me just make sure that Router2 can\n

On Router1 display the routing table and review\n

Okay, it's got connected routes for its connected\n

Task 4, configure Router1 and Router2 with\n

I'll advertise the FastEthernet0/0 network...

101.0 /24 wildcard mask AREA 0.

And then the serial0/0 interface.

Okay, that's all for Router1.

100.1 /24 wildcard mask in area 0.

And then the serial0/0 interface.

Okay, so Router1 and Router2 should become\nOSPF neighbors.

Let's check the neighbor table here on Router2.

I'm going to watch this process.

Let's see if we can see the LOADING to FULL\ntransition.

Some of these transitions are pretty quick\n

Okay, it went pretty quickly from LOADING\n

It says on Router1, but I'll check here on\nRouter2 first.

Okay, it is learning the 192.168.101.0 network\nhere.

You can see it in the routing table.

Okay, and Router1 is learning Router2's network,\n

Okay, and then the final step.

Verify your configuration by pinging from\nHostA to HostB.

I'll open up the CLI of HostA.

So, it says here, once you have completed\n

So that is up here, grade lab.

If you click it, it will tell us hopefully,\n

So here are the configurations of each device.

If we were missing commands they would be\nhighlighted in red.

If we had any extra, unneeded commands they\n

But we got everything right.

If you ever have any troubles during the lab\n

which walk you through and give you explanations\nof each step.

Okay, so that's all for this Boson NetSim\npractice lab.

If you want to get a copy of Boson NetSim\n

Before finishing today’s video I want to\n

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