All language subtitles for Free-CCNA-Configuring-OSPF-1-Day-26-Lab-CCNA-200-301-Complete-Course_en

This is a free, complete course for the CCNA.

If you like these videos, please subscribe\n

Also, please like and leave a comment, and\n

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

In this lab we’ll do some basic OSPF configurations\n

This is very similar to Day 25’s lab, EIGRP\n

First of all, before recording this video\n

I want you to get some extra practice with\n

IP addresses, but at this point in the course\n

So, first up I’ll do steps 2 and 3 on each\nrouter.

Step 2 is to configure a loopback interface\non each router.

As I have explained before, a loopback interface\n

I’ll give a brief overview of them in one\n

useful in that they can always be in an up/up\n

go down due to hardware failures, etc.

Then step 3 is to do some basic OSPF configurations\n

I’ll start on R4 and then work toward R1.

First enter privileged exec mode with ENABLE.

Then CONF T. Let’s configure that loopback\ninterface.

Notice these messages indicating that the\n

IP ADDRESS 4.4.4.4 255.255.255.255.

Let me check that it was created.

There it is, and the IP address is 4.4.4.4.

By the way, if you really want to make sure\n

need to use a different command, because as\n

in the output of SHOW IP INTERFACE BRIEF.

So let’s use this command instead.

Look here, ‘Internet address is 4.4.4.4/32’.

I like using SHOW IP INTERFACE BRIEF for a\n

might have to use other commands.

Okay, now let’s configure OSPF.

ROUTER OSPF, and I’ll use a process ID of\n4.

Remember what I said in the lecture video,\n

local router, the other routers don’t care\nabout it.

Just to show that, I’ll use a different\n

that they still become OSPF neighbors.

Next up let’s activate OSPF on R4’s interfaces.

I think I showed you this trick in the EIGRP\n

interfaces at once you can do this.

NETWORK 0.0.0.0 255.255.255.255 AREA 0.

That’s configuring a range of 0.0.0.0/0,\n

Remember that the network command uses a wildcard\n

So, OSPF is enabled on all interfaces.

In real networks it’s recommended that you\n

activate OSPF on, I just wanted to show you\n

Now, we are also instructed to configure passive\n

F1/0 and F2/0 are connected to routers, so\n

Not only G0/0, but Loopback0 also.

Routers will send OSPF hello messages on loopback\n

I’ll take a look at some OSPF show commands\n

go through the configurations on R3 and R2.

IP ADDRESS 3.3.3.3 255.255.255.255.

ROUTER OSPF, and this time a process ID of\n3.

Let’s try another way of enabling OSPF on\n

NETWORK 10.0.13.2 0.0.0.0 AREA 0.

NETWORK 10.0.34.1 0.0.0.0 AREA 0.

NETWORK 3.3.3.3 0.0.0.0 AREA 0.

Here on R3 there’s only one interface we\n

Okay that’s all for R3, next up I’ll configure\nR2.

IP ADDRESS 2.2.2.2 255.255.255.255.

Again, I’ll use a different process ID,\n

I’ll enable OSPF on both physical interfaces\nfirst like this.

NETWORK 10.0.0.0 0.0.255.255 area 0.

NETWORK 2.2.2.2 0.0.0.0 AREA 0.

And let’s make that a passive interface.

IP ADDRESS 1.1.1.1 255.255.255.255.

So, we are told we don’t need to enable\n

Well, we are going to advertise a default\n

no need for them to know about this point-to-point\n

If R2 needs to reach a server over the Internet,\n

the traffic to R1, there’s no need to know\n

So, we won’t activate OSPF on the interface\nunnecessarily.

I’ll do each interface one by one.

NETWORK 10.0.12.0 0.0.0.3 AREA 0.

NETWORK 10.0.13.0 0.0.0.3 AREA 0.

NETWORK 1.1.1.1 0.0.0.0 AREA 0.

Notice that for each router I configured the\n

On R4 I used a single command to enable OSPF\non all interfaces.

On R3 I specified the exact address on each\ninterface.

On R2 I enabled the two physical interfaces\nwith one command.

Here on R1 I configured the network address\nof each interface.

Just be aware that there is more than one\n

Okay, now let’s make Loopback0 a passive\ninterface.

Before checking out some show commands here,\n

First I’ll do DEFAULT-INFORMATION ORIGINATE.

Currently, a default route isn’t configured\n

IP ROUTE 0.0.0.0 0.0.0.0, and set the next\n

Okay, we’re done with the configurations\n

First let’s check out SHOW IP PROTOCOLS.

We’ve already covered the output of this\n

loopback interface’s IP address of 1.1.1.1\n

DEFAULT-INFORMATION ORIGINATE, it says ‘It\n

An ASBR advertises outside networks into the\n

default route to the Internet into the OSPF\ndomain.

Now let’s look at a few OSPF-specific commands.

I will cover these in detail in the next few\n

First, to view the Link State Database, LSDB,\nuse this command.

Here you can see all of the LSAs in the LSDB.

Notice there are a few types displayed.

‘Router’ link states, ‘Net’ link states,\n

I’ll talk more about these in the next video.

Here’s another command, to view R1’s OSPF\nneighbors.

As expected, R2 and R3 are listed as OSPF\nneighbors.

And one more command, SHOW IP OSPF INTERFACE.

You can specify an individual interface if\n

This gives details about the current OSPF\n

Feel free to look around at the output of\n

their output in a future video, just wanted\n

Check the routing tables of R2, R3, and R4.

What default routes were added?

The default route is down here, via 10.0.12.1,\n

Okay, R3’s default route is via R1, 10.0.13.1.

Now let’s check R4, and you might see something\n

What do you think the next hop of the default\n

Note that the connection between R1 and R2\n

Since I already taught you that OSPF uses\n

you probably expect the path via R2 to be\n

only one entered into the routing table because\n

Well, it looks like both routes have been\n

Well, I will explain that in future videos.

But if you want to do some independent research,\n

If you think you know the answer, post it\n

Okay, so in this lab we did some basic OSPF\n

passive interfaces and advertising a default\nroute.

Now let’s check out a bonus lab in Boson\nNetSim for CCNA.

Okay, for today's Boson NetSim lab preview\n

here, planning and configuring single-area\nOSPF.

Here is the lab topology, there are four routers.

Routers 1 and 3, and 2 and 4 are connected\nwith fastethernet.

But routers 1 and 2, and 3 and 4 are connected\n

it is using 'frame relay' as the Layer 2 encapsulation.

So, frame relay is a layer 2 encapsulation,\n

Now, some other options for serial connections\nare PPP and HDLC.

Now, in the current CCNA you don't have to\nknow these in-depth.

I will mention them briefly in these OSPF\n

Okay, down here are the commands you need\n

on each device, and then the lab tasks.

So, this lab is divided into four main tasks.

Verify initial configurations, plan for OSPF,\n

So, in the first OSPF video, the first lecture\n

So we're not actually ready to complete this\nwhole lab.

But that's okay, we'll just do task 1 and\n

And if you want to try it out yourself, you\n

the description and try it out yourself here\nin NetSim.

Step 1, verify the IP address and state of\n

So, I'm already in the CLI of Router1, so\nlet's check here.

Let's check with the IP addresses table here.

Serial0, 10.1.0.1, looks good, FastEthernet0/1\n

Okay, and they are both up and up.

To open Router2, click here on the right side\n

Okay, serial0/0, 10.1.0.2, looks good.

Okay, and they are both up and up.

Okay, serial0 is 10.3.0.3, that's correct.

Fastethernet1/0, 10.0.0.3, and that is correct.

Okay, and finally I'll check on Router4.

Okay, 10.3.0.4 is good, 10.2.0.4, that is\ngood also.

Okay, so all of the IP address configurations\n

Okay, next step 2, I'll try some pings.

So first from Router1, I'll try to ping these\n

Okay, so I'll go back to Router1.

Ping first Router2's serial0/0 interface,\n10.1.0.2.

And next, Router3's fastethernet1/0 interface,\n10.0.0.3.

And then step 3, from Router4 ping Router2's\n

So I'll ping these two interfaces here.

PING 10.2.0.2, that is Router2's fastethernet1/0.

So the initial configurations are fine.

All the interfaces are up/up and there is\n

All four routers should be members of the\nbackbone area.

What is the area ID of the backbone?

So, as I said in the last video, the backbone\narea is area 0.

Now, for single area OSPF you don't actually\n

use any area number, area 1 2 3 4 5, whatever\nnumber you want.

However generally it's recommended that you\n

And that is one of the requirements of this\nlab.

Okay step 2, your configuration should be\n

are added to the router those networks are\n

Okay, so we have to be specific with our NETWORK\nstatements.

We can't use the trick I showed you earlier,\n

We should be specific about which networks\nwe want to advertise.

Okay, the IP routing tables on each router\n

Using the IP addresses table, list the specific\n

So, we should configure the specific subnet\non each interface.

So, all of them are /24, as you can see.

So if you want to know the network address\n

So, for example on Router1 there is 10.0.0.0/24\nand 10.1.0.0/24.

Router2 has 10.1.0.0/24 and 10.2.0.0/24.

Router3 has 10.0.0.0/24 and 10.3.0.0/24.

And finally Router4 has 10.2.0.0/24 and 10.3.0.0/24.

Step 3, list the OSPF network commands necessary\n

Okay, so we'll configure the NETWORK statements\n

use a wildcard mask, so the /24 would not\n

So, just to show you the commands that you\n

So, for example on Router1, NETWORK 10.0.0.0\n

And you can check on Router2, 3 and 4 as well.

Okay, now from step 4 it talks about some\n

in the last video, for example DR, that stands\n

topic in OSPF and I will cover it over the\nnext couple videos.

So, I'm going to end this lab preview here.

If you want to try this lab and all of these\n

get a copy of NetSim from the link in the\ndescription.

Before finishing today’s video I want to\n

Thank you to Florian, Daming, Venkatesh, Kone,\n

Justin, John, funnydart, Scott, Hassan, Gerrard,\n

Mark, Miguel, Yousif, Sidi, Boson Software,\n

Sorry if I pronounced your name incorrectly,\n

One of you is still displaying as Channel\n

me know and I’ll see if YouTube can fix\nit.

This is the list of JCNP-level members at\n

2020, if you signed up recently and your name\n

Please subscribe to the channel, like the\n

with anyone else studying for the CCNA.

If you want to leave a tip, check the links\nin the description.

I'm also a Brave verified publisher and accept\n