Time
13 hours 57 minutes
Difficulty
Beginner
CEU/CPE
14

Video Transcription

00:00
Hello and welcome back to I see anyone interconnecting Cisco networking devices part one this absolute 3 to 5 e t. P. Concepts, trunk and configuration and verification.
00:13
I am trend here, and I'll be your instructor for this course.
00:16
Your last video one over how they could figure it out of the Mayan Ana switching configure. The interface is to use it. It is absolutely recovering the villain Trucking protocol, RV, teepee and how to configure the trucking
00:28
ports and how to verify them
00:32
And the lesson objectives. For this we look at the VTB concepts, the trunk poor configuration of concepts, and we're gonna verify that trunk poor configuration
00:42
and is always quick pre assessment here,
00:44
a dynamic desirable is set on one end of the Lincoln dynamic Auto is set on one end of the other.
00:50
What will the port negotiate to give you a few seconds here?
00:58
All right. It is a trunk port. We'll see you in a minute.
01:02
All right. So I have gone ahead and configure the switches. As you see here, I've added those management I p addresses. I've put the
01:11
Kelly Lennox preeminent boon to laptop and of Eli and 10 as their I P address would put them in that suddenly I put the Microsoft surface or Lennox laptop there
01:21
into the lane 20
01:23
All the respective interfaces.
01:26
I have a
01:27
cable, a crossover cable. Remember, between the switch, wanna switch to on F A 0 24 on each end? I have not touched any of the trunk in configuration for it,
01:40
so we'll go ahead and jump right into V T. P.
01:44
So this is a Cisco proprietary protocol. What it does is it advertises what V lanes are configured in one switch so that all the switches on the campus will learn about those villains.
01:56
I Hopefully you're thinking what I was thinking when I first learned about it. Sounds awesome. It sounds like it be super easy. Just configure everything on one head.
02:06
The problem comes into Ah,
02:09
let's say you actually only push one of your lab switches onto the network and be TV. BTP mode is set to server
02:19
and next thing you know, he just wiped out all of the V lands on campus because they all learned the
02:24
configuration or the B line configuration from your
02:29
switch.
02:30
So you said it works in the client server model, so server is only it could be able to get it figured the normal range of the lines. So you can't hit the 1006 to 4095.
02:40
The client can't actually gonna figure any of the lines because it's gonna reach out to that server to grab the lan configuration.
02:49
So the show running, configure, show run, as we always deal, doesn't actually listen the viewing commands anymore.
02:58
So if you look under your switch, you gotta show V t p status
03:02
that will show what it's actually set for it. What thing you might want to do for your thing we're gonna set up for all of our switches that we're gonna do V T V V T P mode a transparent or BTP mode off. What it actually does is transparent. Will just kind of sit there.
03:22
And if it receives any
03:23
BTP server messages, is just gonna fordham on assistance. See? Okay, I'm not gonna change my configuration, but I'm afford the messages
03:30
BTP mode off will, like,
03:32
completely showed itself off from BTP. A message will come in from a server. It's gonna completely just drop that packet has done with it. It doesn't want anything to do with it.
03:44
So we go into the veal in shrinking commands,
03:49
hears we're in interface configuration, but we go to every we did a switch port mod access in the Alaskan demonstration. Right? So it's always gonna act. Is that access poor?
04:00
So here's the different options you have. You have access, trunk dynamic, desirable and dynamic auto.
04:06
So access tell it, always active the trunk or access port. That trunk told to always act is a trunk port.
04:14
The dynamic, desirable it will actually initiate the negotiation messages and shoes were the trunk or not,
04:21
right?
04:23
So if then it desirable starts talking, it starts negotiating with the other side of the link. It realizes that it's configured as an access port is just going to say, OK, I work is an access, not a used deal,
04:35
whereas if it's set up in the trunk, it'll, uh, we're gonna trunk so trying and look at that chart down there and figure it out. Um,
04:46
like we said, you never want to set up a access on one side on a trunk on one side is gonna run into a lot of different issues.
04:54
So dynamic auto, What that does it passively waits for those trucking messages and decides to truck or not.
05:00
So the way I always think about these different military, so access and shrunk think off
05:04
like your little snotty little kids. They're just sitting in the corner with their arms crossed and they're just sitting there like I'm only gonna be a trunk today. I'm only gonna be an access port,
05:14
you know, they're just That's all we're doing. There's There's no negotiation happening with these kids.
05:18
Okay? So dynamic, desirable. Think of him as almost like a leader,
05:24
right? He's gonna start the talks. He's gonna decide, okay to a trunk or not. You know, he's gonna try and get others involved and decide what they want. Decide what's gonna happen.
05:35
Think of Dynamic auto. Almost is like the follower, right? He just kind of sits there. He's just kind of sitting around doing his own thing, waiting for someone to tell him what to do.
05:45
Um, someone comes around and says, Hey, you know, let's go do some trunks stuff.
05:48
He's like, Okay, you know, I'll go do that,
05:51
you know, he think of desirable as a leader, they're always gonna initiate the negotiations. Auto just passively waits for those trunk messages, whereas statically configuring his access or trunk is like the snotty little kids in the corner saying, You know, I'm only gonna do this today
06:08
so we will jump into the configuration commands. Remember, the default state will go over. Here is the administrative mode is dynamic auto. The operation mode is static access.
06:21
The administrative encapsulation is doubt. One Q convert. The two different kinds of encapsulation here is 20.1 Q and I sl
06:30
and the operation caption his native.
06:35
So are the things you want to do here for to create this trunk port and you got to set your encapsulation
06:41
mode so you want to do 0.1 cure I, Esso or negotiate? I always would just said it that one Q
06:48
switch port mode. So there's where you had your access. Your trunk, your di neighbor desirable.
06:55
Your dynamic auto.
06:57
Um,
06:59
the way I've always set it up is just too statically. Set them because you generally should know where your trunk ports they're gonna be. You should know which ports are gonna be set up for access ports.
07:13
You wouldn't want to set up an access port as a trunk port because that can be negotiated by an attacker to utilize that as a trunk poor. Then he can start grabbing information from your network.
07:24
So the show interfaces faster. 01 switch port that's gonna show you all of your
07:30
on those four
07:31
modes and status is at the very top.
07:35
Then you'll see the show interfaces trunk will show your trunk ports.
07:40
So let's go ahead and get into the configuration demonstrations. So we're gonna create that trunk link between switch. Wanna switch to on F A 0 24
07:48
We're gonna verify the modes on the interface,
07:54
and then we're gonna move one device and 1,000,000,010 to view her view and, uh,
08:00
tent from switch. Want to switch to
08:03
so we'll go ahead and grab the Kelly VM for F A 021 switch one and move it into
08:09
I want to switch to there. We will set that interface for viewing 10 and then we'll test the ping from the Cali box to the boon to laptop because they'll be on different switches going through that switch port
08:24
are going to a trunk port to make sure that our trunk port is working properly.
08:28
So I'm gonna bring up the party session here.
08:33
All right, we are in switch one.
08:37
So if we do a show
08:41
in her face if a 0 24
08:43
Swissport
08:46
this is where that all that information is something gonna cue to stop it.
08:50
So if we look here
08:54
where administrative moved dynamic Otto
08:56
were static access don't want Q encapsulation and native trucking cancellation.
09:03
Look,
09:03
so I'm gonna get into the interface configuration here. Interface F A 0 24
09:09
Remember, we want to go to switchboards mode. Well, said it as a trunk.
09:16
So, actually, what I'm gonna do, I'm gonna shut it down because I don't want to run into any issues. Um,
09:22
so okay, administratively, shut down.
09:24
We are at a trunk road
09:26
doing kep switch. Sports encapsulation?
09:35
No, Sorry. Ran into an issue there, sitting there trying to set my encapsulation of that one queue. Forget that some of the newer switches they don't even support I sl anymore. So
09:46
there's no need for you even say encapsulation. Don't you even newer switch? Um,
09:52
that threw me off so If you look at the commander have out here, This is the command that you would run the switchboard trunk encapsulation don't want Q.
10:00
Since my doesn't support s Oh, it's just only running down one Q. So there's no need to explicitly say it.
10:07
Okay, that threw me off here. Um,
10:11
so we have could figure it to be a trunk with Shut it down. So I'm gonna go ahead, move my counsel cabling to switch to and set. That one is a trunk as well.
10:20
All right, So we should be in counseled to here
10:22
for your tea interface, that phaser four
10:26
such bores mode trunk.
10:31
And this one doesn't need to be a no show. So this and
10:35
now move it back to switch one.
10:41
So back to switch one that will run ain't no shuts. So we'll turn that port back out here.
10:46
We'll wait for its come back. Oh,
10:50
you know, if we do a show interfaces f a 0.4 switch ports.
10:58
All right, we are administratively mon trunk. Operation trunk.
11:03
We're doing that one Q.
11:07
So now if we just go into show switch,
11:13
show interfaces
11:16
trunk
11:18
here. We have a summary of the inner shrinking interface is now.
11:22
So here's the thing. See Native you lane one.
11:26
We are allowed all villains on the
11:28
trunk and villains and measurements.
11:33
So now we are said it was a trunk. So I'll go back to here
11:37
trunk here, which means that everyone should be set.
11:41
So let me show you what it does with dynamic, desirable
11:46
for words that just what account looks like such pork mode
11:52
dynamic, desirable
11:54
and show interface If a 04
12:00
switch ports,
12:01
so here's what that means. So administrative mode is what you're gonna set.
12:05
Operation mode is what it's negotiated to be
12:09
that same thing. So the administrative trunk encapsulation That would be
12:16
what you had said it as if you could set it so it could be said his I SL or Don Q. But since ours only does that one kill, that's what it said as
12:24
look at me, says negotiators, Well, all right, so I'm gonna go ahead and move the Cali box to the switch to here,
12:33
so I will bring up my Kelly box here. All right, so let's go ahead. We need to Ping
12:39
Will Ping the closest machine here first hoping switched to
12:46
on Dhe did. Imagine I p for that 10.
12:54
So now that we plugged the candy box into switch to let's go ad,
13:00
I'm gonna go ahead and move my con support to switch to now.
13:05
Now that we moved Kelly to switch to, I'm gonna go ahead and with e.
13:09
I can't support over to switch to
13:11
and let's get into it. So everything we need to do, we just do a show. Mac address table. Uh, this dynamic,
13:22
we will see you again. For some reason, that one has to mac addresses. I don't I don't know why.
13:28
Um,
13:30
but anyway, let's go ahead. And so you run a show villain
13:35
brief
13:37
and okay, so,
13:41
delaying one for F zero to. So let's go ahead and change that.
13:45
FAA 02
13:46
switch port mod access
13:50
Such port access, Miran 10.
13:54
Good. And
13:58
and let's go ahead and bring up the
14:01
Rachel backs.
14:03
Let's see if we can do a thing to the closest machine here. Just switch
14:09
to management I p address?
14:16
No.
14:20
Okay, there we go. I guess I should be a little more patient with it.
14:26
All right, So now we get hit Switch to let's go and try and hit. Switch warm.
14:31
We'll see. Okay, so the trunk link is working,
14:35
and lastly was try and see if we can ping the
14:41
51. So this will be the moon to laptop,
14:46
and we got communication over our trunk link.
14:50
All right,
14:52
so we're all working now. We have all the pings from you in 10.
14:58
All right? So I'm gonna go ahead and minimize everything here.
15:05
All right.
15:05
Now onto the post assessment which configuration option will initiate the negotiation messages when trying to trunk.
15:18
Okay, hopefully you got this. It is dynamic, desirable
15:22
for access and trunk thinking was a little sonny. Look in the corner saying this is all they're gonna D'oh,
15:28
Don't. Avocado is kind of guy. That's just not sure. Want Just wait for someone to tell him what to d'oh
15:33
and desirable is going out and trying to negotiate to be a truck.
15:39
In the next episode, we're gonna look quickly at the access and voice feelings and a little bit of how they work.
15:45
And as always, if you have questions, need some help. Feel free to shoot me in my city shelter wise thinking for Washington subsequent. Look forward to seeing you next one

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