All language subtitles for Free-CCNA-NTP-Day-37-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 will configure NTP in this\nnetwork.

R1 will synchronize to SRV1 over the Internet,\n

Unfortunately some of the commands I showed\n

Tracer, such as the CLOCK SUMMER-TIME command,\n

But there are still many NTP configurations\n

In step 1 we will configure the time on R1,\n

Note that we haven’t configured the time\n

CLOCK SET 12:00:00, that’s hours, minutes,\n

Okay, the time is correct and the source is\nuser configuration.

Later we’ll configure NTP, however something\n

But if you manually configure the time on\n

the synchronization process will be a little\nquicker.

I configured the NTP server, SRV1, for the\n

Actually, while we’re here I’ll do step\n

If you’re not sure how many hours your time\n

Okay, so the clock is now 9 hours ahead of\n

CLOCK SET 12:00:00 Dec 30 2020.

And I’ll configure the time zone.

And finally I’ll do the same on R3.

CLOCK SET 12:00:00 Dec 30 2020.

CONF T. CLOCK TIMEZONE JST 9.

The clocks on R1, R2, and R3 don’t match\n

That will be fixed when we enable NTP later.

Step 3 is to configure R1 to synchronize to\n

So I’ll return to R1 and do that.

Okay, 1.1.1.1 was configured but as you can\n

This can take quite a while, especially in\n

here a bunch of times to fast-forward the\nsimulation.

Okay, hopefully that’s enough, I’ll go\nback to R1.

But the console has timed out because of inactivity,\n

Okay, the asterisk is there now.

It’s stratum 1, as you can see here.

So, now that R1 is an NTP client it is an\n

It should be 2, because it is syncing to a\nstratum 1 server.

Okay, that is correct, stratum 2.

Okay the time source has changed to NTP.

In step 4 we must configure R1 as a stratum\n8 NTP master.

R1 is already acting as an NTP server because\n

be able to use R1 as an NTP server.

However, what if R1 stops being able to sync\nto 1.1.1.1?

If we configure R1 as an NTP master, that\n

It says to configure R1 as a stratum 8 master,\n

Next we must configure R2 and R3 to synchronize\n

Okay, since I’m on R1 already I’ll configure\n

First, enable NTP authentication.

NTP AUTHENTICATION-KEY 1, you can use whatever\n

No password is specified in the instructions,\n

Finally I’ll configure key 1 as a trusted\nkey.

CONF T. First I’ll enable NTP authentication.

NTP AUTHENTICATION-KEY 1 MD5 jeremysitlab.

Then configure key 1 as trusted.

Finally I’ll configure R1 as R2’s NTP\nserver.

NTP SERVER 192.168.12.1 KEY 1.

That configures R1 as R2’s NTP server, and\n

As the note says in step 4, the NTP source\n

so instead of using a loopback interface I\n

The reason you need the NTP SOURCE command\n

interface as R2’s NTP server, but the replies\n

interface, R2 won’t sync to R1.

Now I’ll fast forward the simulation again,\n

Since I’m on R2 I’ll do step 5 also, which\n

Okay now let me show you something strange\nabout packet tracer.

I just configured NTP UPDATE-CALENDAR, so\n

SHOW, and I’ll use the question mark.

As you can see, there is no SHOW CALENDAR\n

So, there is the NTP UPDATE-CALENDAR command,\n

Okay, I’ll do the same configurations on\nR3.

NTP AUTHENTICATION-KEY 1 MD5 jeremysitlab.

It’s pointless in Packet Tracer, but I’ll\nupdate the calendar.

That’s it, now I’ll fast forward the simulation.

And let’s see if R3 synced to R1.

Okay, the time source is NTP, looks good.

Once again, this is pointless in Packet Tracer\n

Okay, we have completed all of the steps.

Originally I had another step to configure\n

R3, but that command is also unavailable in\nPacket Tracer.

But in this video we practiced many of the\n

Next let’s take a look at a bonus lab in\n

Okay here's today's Boson NetSim lab preview.

The lab I have selected it 'configuring NTP 1'.

So, NetSim for the CCNA actually has 5 labs\n

It seems to be a pretty simple lab about NTP.

Here is the topology, three routers.

And these are the commands you need to know.

And these are all commands you already know.

Task 1 says 'perform initial configurations.'

So in this task you just configure the IP\n

So I actually completed this task, here you\n

So I finished this task and we can go straight\n

Step 1 says 'Is Router1, Router2, or Router3\n

Let me check with SHOW NTP STATUS.

No, NTP is not enabled on Router1.

Okay, configure the date and time on Router1\n

Alternatively you may use your local date\nand time.

Okay so I'll do that on Router1.

CLOCK SET 9:00:00 25 JUL 2013.

Configure Router1 to be an NTP master using\na stratum of 3.

Okay, CONF T. NTP MASTER, and here we specify\n

Once again, the default if you enter the command\n

So we want to set it to 3, so NTP MASTER 3.

Configure Router2 to be an NTP client.

Okay so, we'll use the IP address of Router1's\n

Okay, and I'll leave it like that.

I think in task 3 we'll actually verify that\nthis is working.

Configure Router3 to be an NTP client.

You should use the address of Router2's Serial0/0/1\n

Okay, and that's it for task 2.

Okay finally task 3, verify NTP.

On Router1, observe the status of NTP.

What are the stratum and reference peer address?

Stratum is 3, because we configured NTP MASTER\n3.

And the reference clock is a loopback address\non Router1.

Okay, let's check on Router2.

Okay the clock is synchronized, so that means\n

is 4 as expected, 1 higher than Router1.

And also we can see the reference is Router1's\naddress.

Okay step 3, verify that Router1 is the NTP\nmaster.

Okay well I can see that here, because that's\nRouter1's address.

But I'll also check the associations table.

Notice that the output is a little different\n

This must be a different version of Cisco\nIOS.

Step 4, on Router2, observe all NTP associations.

Or maybe step 3 was supposed to be on Router1,\nwhatever.

I'll go on to step 5 and we'll check out Router3.

Okay, looks like it has synced to Router2\nhere.

What are the reference peer address and stratum?

The stratum of its peer is 4, so Router3 must\nbe stratum 5 now.

Okay in steps 3, 4, and 5 in this task you\n

Why were the reference peer addresses different\non each router?

Oh that is because they are syncing to different\nclocks.

So, Router1 is syncing to its internal clock.

So the reference clock is a loopback address.

Router2 is syncing to Router1, so the address\n

And Router3 is syncing to Router2 so the address\n

On Router2 and Router3 display the clock and\n

Now I will use the 'grade lab' function by\n

You completed the lab successfully.

Notice that nothing is highlighted in the\n

If there are any missing commands or extra\n

Okay so that's a quick look at Boson NetSim\nfor the CCNA.

As I've said before, there are over 100 detailed,\n

Some of them are simple, some are very complex,\n

So if you want to get Boson NetSim, please\n

Before finishing today’s video I want to\n

To join, please click the ‘Join’ button\nunder the video.

Thank you to Biraj, Magrathea, Samil, Junhong,\n

Nasir, Erlison, Apogee, Marko, Daming, Jhilmar,\n

Yousif, Boson Software, Devin, Lito, Yonatan,\nand Vance.

Sorry if I pronounced your name incorrectly,\n

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