DHCP Relay Agent Lab

Despacito 2 Been asked questions through email.pdf no po.ta.to BESTWEB EVER remember a Dhcp server has a process it's called dora discover offer Request and acknowledge the discover part is a broadcast routers doing a live broadcast Why because routers I mean broadcast is yelling so router says oh, you're yelling at me. I'm not going to pay attention to you I'm gonna drop that packet so Discovers don't go beyond Your local segment, so what does that mean that means that these poor individuals over here are not gonna get an IP address All right, they're not gonna get an IP address, so what is it that we're doing I? Set up two routers, or we're gonna set up two routers okay with proper ip's SATA 30 now everybody i've Have experienced trauma where I'm teaching a networking class Necessarily specifically CCNA, but a networking class and there ask me Why are we learning IP addresses if you don't know how to IP address you're not gonna create a network, okay? Regardless so and don't make the excuse well. It's not my job. Somebody else does that well, then you don't need to be an IT Alright, IP addressing is the fundamentals of? Networking you need to know that so We're using up here between these two interfaces We're using the 10110 outsider 30, which means this is going to be adult 1.2. We're using the 192 and say 10.0 My gateway is the last Standard 10.2 50 for the server will have the 10.1 and the client will see what pool will create there Okay, and then these frames don't have any IP addresses. There'll be in this 20.0 pool all right And obviously this will be in the 10 whatever though starting IP address is what I meant what it's gonna Be ok so we'll decide when we create the pool, but this will be in the 20 Network that'll be in the 10 network, and we'll see what happens before we configure the DHCP relay agent and After we configure the DHCP relay agent, and it's important that you understand the concept that is somebody born in your behalf Grabbing the IP address from the proper pool the correct pool of addresses and bringing it back and allocating those IP addresses to you now obviously You're not this is not a reality Because let's say this is in Miami and this is in I don't know Fort Lauderdale two cities far apart from each other are you gonna put one ACP show to go across a wide area network so they get An IP address no, that's not reality It was reality at one particular school that if they were down and headquarters down everybody was down that was Not good, okay, but they changed that I think all right so We're gonna create this lab is very creative. We're gonna configure everything from scratch. You see green lights here, but when we do it We're gonna do things from scratch. You're gonna see that we're gonna use a routing protocol in order to get across We're gonna put the IP addresses on the interfaces so Understand the concepts, what's happening? They're not getting IP addresses because they're not on that DHCP servers local segment so we need to configure a relay agents I'm not giving the secret away. I'll give it away inside the lab so with outside. I'll see you inside the lab Hey, everyone here. We are inside the DHCP relay agent like I said before Real agent something that goes in your behalf. It's like a proxy Because you don't have a DHCP server on your segment of the network. This is not reality Because between two routers is really a win And you're not gonna be going across a win even dogs know some schools have done that to get an IP address You don't do that Okay, so is that reality but so you can understand the process of the HTT? We should be explained it already which is dora discover offer Request and acknowledge right the Dora the discover is broadcast so as you can see I have there nothing well I'm gonna just put everything out here the pcs or Gonna get the ACP assigned addresses the server itself is The 10.1 the gateways 10.50 for I have not put in anything on the routers So the first thing we're going to do is we're gonna turn this DHCP into a DHCP server Now obviously, it's not the same way you would on a real server Concepts ladies and gentlemen concepts one of the things that you want to do here is get rid of the server pool Alright, put like 100 or something in something like that save it, so it doesn't interfere with what you want to do alright So we're gonna do a new pool That we're gonna do a new pool we're gonna call the 192.168.0 Network Okay, and the default gateway is gonna be 192.168 10.25 for the dns server address is 192.168.1 which is me and Then my starting IP address so we can really know that we're actually doing something every 10.50 oops 50 ok the subnet mask is gonna be a starter 24 maximum. No more users. I don't care. I'm gonna add it I'm gonna make sure that that's see that's a certain pool. That was the world.we Manor that's rather it so that's there But I'm also gonna make a pool for the 20 right because we have two networks here We had a 10.0 and the 20.0 obviously we don't need to assign IP addresses up here But we do two other clients on the 20 an hour, so they're at a pool for that so we're gonna change the 20 Okay, the gateway is gonna be 20 not too busy for obviously alright, and then a DNS server Well, that's 10.1. He's gonna be our DNS server alright, and we're gonna start at 20.50 here as well everything else is the same we add it and then We make sure you see the 20 right there you see the 10, so I'm sure the 20 gets saved all right So let's see how this works First of all we need to put some my peas yes ladies and gentlemen whether you're doing 8 plus 9 r + Microsoft Basic networking and finally into Cisco you better know how to IP address if you do not know how to IP address They're not complaining if the teacher is teaching you be happy That you're learning this ok. I have come into certain job Related it's like are you teaching me IP all because the network needs to Ok but anyway I'm getting off track alright, so hostname r1 my interface f00 IP address 192.168.1.1 Gateway 25 five two point five two point five zero and Then we turn on the interface by doing nope I got a word there letter no shut Not the other one. Okay, then we go into int F. 0 1 and then IP address It's gonna be the attend I'll 100 101 It's not correct Yes, maybe no Sorry, 30 so if I'm using the one that means I'm using the 0 network if I fire that typify Latifa 535 two Things you need to understand when you're doing this stuff Okay, you need to understand all this stuff Alright, let's go ahead and go on to the same exact thing over here No need because you don't have a DHCP server on this side at all So these are our clients Let's see what happens well. There's not a configure them now The interfaces obviously don't make levy No Wanna enable control shift six to break out of that enable config T Hostname Stop it out or to my interface F 0/1 I P address 10 the 101 the to queue for five two point five two five two point two if I work on this wrong order said I Don't think so. They would have told me just that now will give me an error okay interface F. 0 slash 0 IP address 192.168.1.1 Knows of you're asking me how does he know those appearances? Where is he getting those are PT addresses from? You need to know your network. Okay? You need to know your network You need to know this aside 30 this will be 1 and this will be 2 this will be 1 this would be 2 either R. Or doesn't matter You know your 10.0. Yeah, 24 IP address is available to you. The server's got one. Well. We're using the ACP server I wanted the client to get a 50 ok and my gateway is always the last available IP address on that particular Network Which is 254 because you have 256 available -2 is 54 all right? So that's where I'm getting my IP addresses That's where I'm getting my IP addresses ok, so let's see what oh wait a minute. We got a 1-point thing We're going on across routers this router over here has no idea that this network exists, so Let's go ahead and let's make it. Let's make it easy Instead of a does go running protocol what the heck let's do rip router rip version 2 Network 10.000 whoops and Network 100 at once ok that Do not forget the new Auto summary do not forget don't owe me this really guys taking certifications I'm just showing you DHCP relay agent, but I gotta get everything set up But I want to see to show you that everything was blank and how to set things up, but just since we're here Where's my lost my incursion my mom sure it is alright somebody say hey. Why is he putting the 1000 isn't it seven one more? zero, well, this is the thing it's gonna go ahead and actually I'll summarize it summarize the address back to a class four boundary That's why this is important because this is telling it. Hey rip when you send out your updates please Send out the subnet mask along with it or else it will be lost okay not That's got another ten know where to go to but if your entire network was ten It wouldn't know which way to go so an auto summary is Crucial now it is robber one let's do it for router - Okay, put you right here in the middle screen so everybody can see you exit out of that Router rip version 2 don't forget that cuz guy run the same versions network ten triple zero Network 192.168.0 no auto summary All right tab that out Do WR er okay so what I'm gonna. Do now is I'm gonna go ahead and verify do show IP route and I'm not getting anything yet from that network over. There. Is it still thinking about it or what? Not here. Here's the 10 Marnell summary version - okay You show? IP and brief I love it mini - everything is up 10 1 1 1 10 to 34, okay Josie oops Show up you're out I'm getting from the 20 now Emmy. I was just - Triangle too fast can't keep up with lies hahahaha eggs out of here let me go control Z Get rid of all this gibberish sure if you're out there. We go. There's the tent let's check for cutting Tiffa t-pain 192.168.1.254 that is the gateway over our network and we do our connectivity Awesome, so let's see if this servers assigning the proper idea his own segment So you should be able to assign it all right? Let's take a look and I got enough people it's not assigning anything. That's not going from static to DHCP It'll go ahead and strike a release from you. Let's see if I even remember to turn on the DHCP server It's off, so obviously that will not work. Okay, so we turn that on Like I said, this is not The same thing this is like I guess adding the role in your server you try to do a DHCP server And you don't add the role and you wonder why it's not working So let's go back here again. Let's do a release renew And boom there's a 10.50 there's our gateway 10.1 all right, so let's see 10.50 Let me say campaign 10.15 with all barrel all router to up arrow come on well barrel soon to a 10.15 that is that client down there and Of course ARP we have to wait boom there It is and you get my full bangs, and I got my four banks, but here's the issue These guys over here They're not getting anything they gotta know people because of that discover It's not gonna get to them ever Because routers do not accept they drop Broadcast traffic by default so you Need something called a relay agent or in this case. It's called in a router IP helper address so we go on to the router and We're gonna go into this interface right here because this is where the packets coming from right Okay, let's open this up here. So you can see I'm gonna go config T Interface F. 0/0 I'm gonna say IP helper don't ya cousin overcome, and that's I think helper address, so what is the address of the DHCP server? Oh? 192.168.1 Okay, hey Tanner do W. R, so well, that's gonna. Do it's gonna say okay? you're Requesting you're broadcasting out Because you need an IP address So the IP helper address is gonna take that information Take that request on your behalf turn into a unicast Go to the server Okay, and since already knows within the frame all right what is the address that you need where it's coming from it knows which pool to pick from so let's go ahead and Oh, you can start you saw that right Hey got it. There's got ten 20.50 one because 50 is already taking up well ten fifty one 2051 here and Let's see this. Let's get this guy in a dress And he's got a twenty fifty Awesome so that IP helper address Was the key? To getting that and all you had to do was go into the interface where your clients are at and Type in this right here pointing it to the DAC P server That's it, but hey. Let's verify one of the things you're going to do your certification is to verify What you're doing? Okay? It's to verify what you're doing so I'm gonna go to client Let's see we can go client to client and we go ping One ninety two dot one sixty eight dot twenty-three See remember we have the ARP boom there's our replies, let's go to 51 There's our replies easy easy easy This is part of your new da of your new CCNA certification This has been around forever alright, and they still have it there, but now you understand what it does a relay agent Whether you're doing it on Microsoft server, or you're configuring it on the router Or you're doing it on writing remote access wherever is that you're doing it in Okay it Is somebody going and on your behalf a proxy is something going on your behalf turning that? broadcast address into a unicast Going to the DHCP server getting the correct IP address from from the proper pool because it knows where it came from it's in the frame and then Assign you you know assign the proxy Gil give the proximal here you go Take this IP address, and then it will take it and you will get your IP address Allocated to you. That's all there is to it because of the process of DHCP remember Dora discover offer Request and acknowledge and that Dora the discover is a broadcast it will not go beyond your local segment Hope this was helpful

Channel: The Networking Doctors

Views: 62,056

Keywords: CCNA, CCNP, CCIE, certification, Free, Training, School, bootcamp, easy, teaching, learning, network, engineer, vlsm, ip, routing, switching, vlans, ospf, stp, vtp, frame, nat, access, wireless, ios, ipv6, ipv4, rip, eigrp, static, process, load, balance, bandwidth, computer, plus, career, job, field, study, way, education, multiple, calculator, prometric, cisco, pearson, vue, tcpip, protocol, infrastructure, world, worldwide, topology, lammle, practice, simulation, simulator, prep, panchotraining, protocols, ssh

Id: QSEJ7IBSDH8

Length: 18min 46sec (1126 seconds)

Published: Sun Oct 15 2017