Introduction to GNS3 for Cisco Devices | Ben Jacobson | Skillshare

Introduction to GNS3 for Cisco Devices

Ben Jacobson

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3 Lessons (1h 3m)
    • 1. Intro to GNS3

    • 2. Setting up GNS3

    • 3. Working with physical devices


About This Class

This courses is intended as a quick-start guide for getting GNS3 up and running to virtualize Cisco devices. Use this course in conjunction with my CCNA 200-301 course to more easily lab up the examples and follow along with the course!


1. Intro to GNS3: GNS three. Genus tree is a network device emulation software, and you may or may not have ever heard of this before. I highly recommend you get familiar with software if you're going to continue studying for your CCN A. That this will really allow you to create a lot of topology is very quickly and people to test and lab up a lot of the things we're going to do in this course very quickly and very easily, and also have multiple apologies available and ready at your fingertips immediately. This video is intended to go over some of the basics of GNS three, and it just give you a brief introduction as to the capabilities of the software and then in the following video. After this will go through the configuration and set up of GNS three and how you can get your lab up and running very quickly yourself on your own computer. So let's go through this next slide here. Is that GNS three? It is network emulation software, not simulation. You may have heard of Cisco's Packet Tracer that this is a very popular, very excellent piece of software for studying Cisco devices and working with them and learning them. However, it is a network simulator, not a network emulator. It does not run actual IOS images or other vendors, for that matter. But GNS three this does. This is a network emulator software. It will load an actual IOS image or Annex OS for nexus devices or other vendor devices, as we'll see in mine Brief demo here shortly that I'll have some juniper devices even running, that you can mix and match your vendor devices and get those set up and duplicate them and have ISMM any of them, as your physical hardware will support and allow you to. You can create very large to apologies and be able to test things that you never would be able. Teoh in real life with physical devices unless you had a lot of resource is available to you. And like I said, the device hardware is emulated and with many different slot cards available. So if you want to test serial connections with point to point protocol, you can do that with a specific serial interface. Carter. When interface card a wick on your device and that you can add gigabit Ethernet, fast Ethernet or just 10 megabit Ethernet. You can have these slot cards in your device and be able to get experience with how they interact and show up in your device, and that you're able to create and test apologies without ever racking or configuring actual hardware that you can have these apologies up and ready. You can save them. You can leave it running in the background even and come back to it later or set up a whole new topology. Work with that one and then come back to the one you had running in the background and have them be totally separate, completely virtualized and not interacting with each other at all. And that's really the power of GNS three. Here is it allows for very quick, very easy network prototyping and learning for creating large or small to apologies. So first up GNS story it creates working environments called projects is that you're creating a new project with that button right there or you'll see in the first start up screen. We have the option to create a new project there, and that this central area here, this is your project work space. This is where you would click this button to get your list of all devices, and then you could take this device and drag it out onto your project work space, and that creates an instance of that device. It does not turn it on immediately, as we'll see very shortly here and over here will be a summary of your topology, the devices that you have in your project workspace, and you can also list their their connections and what they're connected. Teoh that to give you a brief overview of the buttons here, this button here to start all devices. This is to suspend all devices. This is to turn off all devices here. You can go ahead and create some mark up on your workspace. Create some text box or some shapes to be able to visually segregate your devices as I'll show you in the demo shortly here, and you can zoom in and out of your topology and take screen shots over here. This button is used to create connections that when you drag a device out here or two or three devices, you would click this button. You now have the connection tool. You click a device. It will give you a list of the interfaces available, and you can select one to connect this wire to this virtual wire and then click another device and select the interface that you want to connect on that device there and then the other buttons here. I don't use these really at all that they're just for your virtual PC or things of that sort. We would also access our preferences section in the edit menu here, which I'll show you very shortly in our demo. So with GNS three, your devices can be run locally in a local VM on your computer or nous separately hosted VM and the separately hosted VM. This is really the most expandable, most scalable solution here, But the local VM is really the best for a single person using this on their laptop or desktop that that's the most compatible with devices and running locally. This will be the quickest and easiest way to get it up and running very fast. It has some compatibility problems that you cannot run the IOU images, which is IOS on UNIX or I o L IOS on Lenox, and that does limit your ability a little bit But that's no problem, depending on your situation. As I mentioned, many different vendor devices can be emulated. Juniper, 40 Gate, Cisco Brocade. All of these are supported in GNS three and that you might have to go through with obtaining the images for each. And you can do that in your own fashion. I recommend Googling for this. A lot of the images can be obtained online without necessarily needing to have a service contract with those vendors. But be mindful that that does breach typically the terms of service or the license for the vendors. So I'll just be mindful of that. If you're going to be using some third party obtained image in your lab personally, that's I wouldn't have a problem with it because you're using in a lab and not a production environment. But just be aware that that does breach the license or terms of service there for those vendors usually, and that any terminal emulator program, if you like putty, if you like secure CRT or any of those, you can use that to access the consul of the devices, and I will show you briefly how to do that. So let's go ahead and check it out here. Is that I've got GNS story open in the background here, so I just opened it. And this is the brand new front page where this will show you have the option to create a new project here. We can set some of the settings off our server here and of our software. We'll go back into this shortly. This is the preferences menu that we would get to from the edit menu. If I go ahead and click cancer, I'm gonna open up a new project here. I can open a new project, but I'm gonna go to my projects library. And here are some of the projects that I have here for topology Is that I've created is that we can do pretty simple projects. Let's check out the point to point protocol lab that I had set here. So let's click. OK, that's gonna load up. Our project is I've got three different routers here, and I set some text boxes here, so I know what is going on between these and that I've got are 12 and three each of these. If I take a look up here at mind topology summary As I can expand this, it shows what the connections are between each of these devices are, too. Has two connections coming off of it. One toe are three. The other two R one and R three is coming from cereal to slash one on R two d two slash one on our three and two slash zero on our to is going to two slash zero on our one when I'm doing point to point protocol pap and chap authentication on the other side. Awesome. So like, if I want to go ahead and create a new connection, I click my connection tool. I click my device. I've got my list of interfaces available in that device. I could do fast Ethernet on that device over to the fast Ethernet on our two. Now, mind you, that looks a little silly, and you might want to work that out a little differently. You can not move these lines here, but you would know that the Internet and connections between devices are this black line here and that serial connections use this lightning style line there. I can go ahead and click this connection here. That was the Internet connection there. And I can go ahead and click the delete button on my keyboard and that gets rid of that connection. If I click this button here, this gives me my list of appliances. The grade out appliances here are ones that do not actually have a template or image installed s. So there's a lot of these that I cannot use right now because I don't have an image installed. But there's some like the juniper devices here, the VM X and V SRX. I can go ahead and add to my topology here by just clicking and dragging that out here. Now, down here, I have this running on a separately hosted VM that I have a VM on my s ex. I host that I'm connecting Teoh with this software here and that. That's where all of these appliances are actually running. I'm using 50% of the CPU on that VM right now with about 50% of the Ram. Honestly, a lot of that is from a separate project that I have running here in the background. The Juniper test project that I have here these v SRX is see up here in our topology summary. We have some green circles now, those air saying that those devices are actually running on those are active right now. I could go ahead and double click on this V SRX device here, and that's going to open up my terminal emulator here and that. I've now got access to this V SRX here, and I could do the same for our four and go ahead and open that up. It's opening up on my screen below here, but that's a fresh rounder here that has no configuration. So it's going to the initial configuration dialog, whether I want to do the set up wizard here and that. There we go. I've got my running router here that's already started and running. Now, mind you, I could go ahead and turn off this round or if I don't need that right now, I'll just turn that off. Or if I want to simulate doing a power failure or unplugging a cable if I have a high availability set up with a redundancy protocol hs rpv rrp, what have you I can go ahead and just turn one of them off and see what happens and watch that. And one of the really powerful things here, too, is I can right click on a connection and I can do a capture is that you could do a capture on any of the connections here and that will open up wire shark for you here and that you can now see the packets that air flowing across that connection. Mind you, we don't have any packets falling across here because I turned off that other device. Let's go to a device over here. Where are one is enabled If I go ahead and do OK and do a captured there, I should see some discovery protocol traffic like LDP or CDP going between here at least a little bit. There we go. We've got the loop protocol showing on and you might see a ah CDP Discover go across at some point here that we don't have a whole lot going on because I don't have any I p addresses or anything actually happening on this topology here right now, to be able to show that, But in the course throughout the rest of the course, we will go over a few of these captures and be able to take a look at our protocols more in depth because we're able to set up East apologies in GNS Tree and be able to run protocols between devices and then take a look at a live capture. Tell me how you can do that easily on a physical lab. You just can't. Not easily. At least I've done it through some difficult methods of using a raspberry pi as a remote capture device and doing a span session on a switch and hooking that up and viewing it in wire shark. It's difficult. It's time consuming. Why wouldn't you just set up your virtual topology in a virtual environment here and be able to run a quick capture and see what's actually going on at these protocols like Oh, SPF and be GP or your high availability protocols like HS R, P, M, V. R P or your A J communication for two devices. If you actually have a high availability cluster between two devices, if you want to see what those protocols look like and see what they're actually doing is a very quick and easy way that you can do that is to set up the devices configure the protocol you're looking to configure and then run a capture and take a look at them so I can go ahead and right click and do stop capture. And I will do that on both of these here. Let's just take a brief look at our preferences here and take a look at the options that we have available. We can choose. Where are projects and symbols and configurable stored. We can choose our binary images if they're stored in some different location. Our consul application. I'm using putty to go ahead and connect to the devices, but you could select any built in terminal emulator programs they have here like Telnet Solar Party, Super Party, secure CRT, terror term. All of those. Or you can use a custom and just add in a custom command line here that you want it to run in order to start some custom terminal emulator program that you have. And then as well, you know, we can use the genus tree VM that's built into where we set up the M where workstation or virtual box to run the VM, and that's actually what I have set up in the following video will go through how to configure that and get that running for yourself. What I have is the separate main server is that my servers located over at 1 91 60 dot to 60.0.80 and that it is connecting to that separate server that is actually running the GM s three server that we have our IOU devices that l two and L three image the IOS routers, the IOS images here and the either switch router and then Q e m uvm is where we have our essays and the juniper devices here that you can go ahead and create new V. M's new images and add those indigenous tree is very expandable and very flexible like that . There's a lot of good documentation in their community for how to add various vendor devices. If you would like Teoh in the following video, we're gonna go through how to add an IOS router on also an IOU image to be able to get your switch image in there and set that up so that you're ready to go for this course as soon as possible. Excellent. Now that was the overview for GNS Tree here I hope you really got a small taste as to the capability and can see how this could be very useful in your studies and moving forward in your network engineering career. To be ableto learn the things you need to learn without much hassle and even do it on the go if you would like. Now I hope that this has been informative for you. I would like to thank you for viewing. 2. Setting up GNS3: Now that you've seen a little introduction as the capabilities of G. M s three and what you can do in it, I'd like to go through a tutorial here on how to set up G N s three in a Windows environment so that you can set up your own lab as well and follow along during the course as we set up our labs and you can go ahead and play with those yourself. The way this is gonna work is that I'm quickly going to go through a power point slide here of the steps involved with setting up DNS three and then I'm going to switch over to my fresh Windows virtual machine here, and we're going to do it ourselves as well. And you can follow along. We're gonna download each application, get it installed, and get GNS three set up. So this is gonna be a little while. So strap in. Let's go ahead and get started and hopefully you can follow along here and get your own lab set up. If you run into problems, feel free to contact me. We'll make sure we get that results that you can get this going as well. First up, we're gonna do this with virtual box. Honestly, I ran into some troubles with VM Ware workstation. It's likely just because I'm working in a virtual machine. Even though I exposed the virtual ization instructions to the virtual machine I ran into problems with that in virtual box is working much better. So I'm gonna recommend that you go with virtual box just for the stability of it. Although GNS three does recommend in there application that you use VM wears VM or workstation, we're gonna go ahead and do virtual box. It works just as well. So we're gonna go ahead and download virtual box. The latest version as of this writing is 6.1 dot zero. Make sure that when you Google download virtual box thing Onley download from virtual box dot org's. Of course, just like any application. There are a lot of fake or scam websites out there. Make sure you check your address before you downloaded. This will be the website that comes up. And if you're downloading on windows, we're gonna go ahead and download the Windows hosts platform package here and then we're gonna get it installed all of the settings can be left at their defaults. Note. When you install this, though, your network connection is going to drop momentarily while the network components are installed. It needs to install a virtual network adapter for your virtual machines to have access to the network, and your network is going to drop. While that happens, just is a note. If you have anything running that requires constant Internet connection, make sure that you stop that before you get virtual box installed. It's a regular next next finish kind of installer. So you're just gonna go ahead and go through, leave everything at their defaults and we'll get that installed. All right, so that's installing virtual box. Let's get G. N s three downloaded and installed so you want to go over to GM s three dot com and slash software slash download. To get that downloaded. Gen History now requires that you register for a free account in order to get that downloaded. It is free. I don't receive any real spam from it or any marketing emails. They just won't go ahead and track the number of people who have downloaded this uniquely and it's okay to go ahead and register for that. It also gives you access to the GMS three community. If you want to post on there, forum or read from there as well. So you download it and run the installer again. Leaving all the options at defaults is okay, and it's recommended that we're just go ahead and do that again and pretty standard. Next. Sex finished, you're going to go over and go next. Leave everything at defaults. It's going to install a handful of applications while it's going. It'll install NP cap and wire shark thes air for running captures on the connections between devices and as well, dynamics and Q E M u. These are for doing your device emulation. So on so forth. So some of the third party software is included. It's gonna launch their own. And Stoller's, As you can see here, NP Cap launches its own installer as we're going it as well. It's just a quick I agree. Next next finished installer, and then it's gonna go through for Solar Putty, the party or the Consul emulation software that GNS three uses for you to be able to access your devices. It is going to require that you put in an email address in order for it to actually work. If you don't put it in now and you just cook this x button here at first like I did. Well, this same box here is gonna pop up when you go ahead and try and use solar party in GNS three anyway and just x out of it. It's just not gonna work. It's just gotta pop it back up again. So go ahead and pop in an email address here. I never received any kind of email here. Honestly, uh, maybe I just went in my spam folder. But I went ahead and put in an email there, and you get us to continue it. You don't have to verify it or anything. So if you really feel concerned, you can go ahead and put in a fake email address. None at noon dot com whatever you would like already. So once that's all finished, then we'll go ahead and click. Finish. There will be a little check box on your installer for jin history asking if you want to start GNs three, you might as well check that and click finish to that. It launches automatically, and then we will go through our first launch. Uh, and this is incorrect since we downloaded in stole virtual box virtual box that will go ahead and select that to run in a VM here that this is the start up wizard. This is the first page you see, when you launched DNS three on that, we will go ahead and select the run appliances in a virtual machine that this is what is used to make it so that we can actually run IOU devices. That's IOS on UNIX or IOS on Lennox. That these are This is what's needed to be able to emulate switches. Otherwise, we can go ahead and run IOS devices, but this is Onley routers on it can be routers with ether switch modules so you can run a router within either switch module and it do your V landing and switch port configuration on your either switch modules. But the configuration commands are not exactly the same as they are on a layer to switch. So it's really good to be able to go ahead and emulate an IOU device, a layer to switch so that you can actually follow along with the switching commands exactly as they are. If you don't have a physical switch to do it on, everything else could be left at the defaults. Here. The service path is going to default toe, where the GNS three server Daddy XY execute herbal was that it installed during the installation host binding could be left at local host. Port binding could be left at the port, and that's just fine when you click next, you're going to get the connected to the server successfully. If it doesn't check your local Windows firewall. If it's turned on, I recommend is turning it off or put in a exception here for the port number. You shouldn't run into problems because it is using local host binding instead of actually doing through the network stack and going into your I P address. But if you do run into problems, go ahead and check your firewall. So next up, when you go ahead and click next if you have VM where this is actually the error message that I ran into continuously with the VM Ware workstation that it was not finding the vics AP I at all regardless of what I tried. And that's why I just decided to not use the M. We're here and go with virtual box. And it's working justifying for me. And I was able to set up several labs in that without a problem. So what will go ahead and do is with this It will give you this air message regardless as well. Just because we're using virtual box and not VM where we'll go ahead and just take the little box here, low radio button for virtual box. And then from there it will likely tell you that it could not find a VM named GNS three VM . So we're not done with our set up here. We're gonna need to download the virtual machine that GNS tree uses to run the appliances and import that into virtual box. There is a link right here. So if you go ahead and click OK out of this air message and you click the download it link here, that will take you to a website from GNs three dot com where you can download the G. M s three VM. That download that you get is a zip file. So we'll go ahead and we'll leave this open here. We can at least and click on the download link. Right? That's gonna open up your Web browser and then you're gonna go ahead and download the VM. It should be a direct link, Regis prompted immediately to download the file. It is a zip file that you are downloading. You're gonna need to go ahead and download that and then extract it inside of that zip. Is this g n s three vm dot gov a. That is your open virtual appliance. That is your template file for you, where you can import your virtual machine so we'll go ahead and open up virtual box because that probably didn't open on its own. And then we'll click the import button here. This is the first window that opens when you open. Virtual box will go to import, and then you will be prompted with this window here, the source will be our local file system. You click the little browse button here and go toe where you extracted your Gina's three vm dot over yea file. Select that and click open. Excellent. That's going to bring you over to your appliance settings. We can leave this all at defaults and the machine based folder. You can change this if you like. This is where it's going to store that virtual machine on your computer. You can leave it exactly. It defaults. That's no problem. If you have a separate hard drive or usually store this type of stuff, you can go ahead and put it there. Of course, as well. Never will end up clicking the import button down here once that's all good to go. Awesome. So then, once you've imported that virtual machine, it's going to show up as a VM here in virtual box. That's no problem. We won't touch that for right now. We're gonna go back over to GM s three and back two hours set up window here. The easiest way to get this to refresh is to just click the back button and then click the next button again is we're just gonna go back and go forward, and then we should now have this refresher. We have the GNS three VM available in the VM name there the number of CPU cores and the Ram size we can leave at defaults for right Now you can adjust that later if you're finding that your appliances air not running quickly enough, or if you're doing larger labs with different types of appliances, where you need to add more ram in there so that you actually have enough memory for all of your devices to be running. But we'll get to that later, and you can adjust that afterwards. That doesn't need to be right Now when you click next, this is gonna go through and use the A P I for virtual box. It's gonna automatically boot your G industry VM and that you're gonna end up with a screen that looks kind of like this, where it's gonna be waiting for local host. And what it's doing is it's waiting for GNS three VM to turn on the here on our servers. Summary. We have our local server, which is our GNS three application that's running on our computer and our GNS tree VM, and that this guy will turn green once that VM is started and on and connected. And then it'll be all good to go and we can go ahead and start up a new project and add in our devices. So once that's done and both of these guys are green, we'll go ahead and create our IOS devices. We're going to start with that. First. Here is that Genesis three will decompress and run a standard IOS image. Using dynamics and dynamics will be run on your local machine unless we choose to have it run on the VM, which we did. So it'll end up running it on the virtual machine that's in virtual box. We need to obtain the IOS image file. This is a dot been file. I recommend honestly that you purchase a cheap router or switch online and transfer the image that you can purchase a new old 1941 router on, and they're not very expensive at all. And that will come with the image on the device. And you can use T FTP to go ahead and transfer that image off of the device that we go over that later in the course on how to use T FTP and you can go ahead and use that to load into gene history as well. These images are available online that it's technically a violation of Cisco's license agreement to go and download images that you do not have the devices for or that you don't have rights for but they are available. I'm not gonna say you should do it or shouldn't do it. It's out there. If you go ahead and Google IOS images for GM s three, you'll find him out there. So the way that will add the IOS image here is if we go to edit and then preferences that opens this window over here we go go down into our dynamics section and IOS routers Select that and they were gonna click the new button that's gonna bring us here into our new IOS router template wizard, and that we will select our IOS image. When you select your bin file, it will automatically ask if it would like to decompress the image and you should click Yes , and then that will decompress it into a dot image file. And that's why that's what's listed here. This is for a C 7200 router, and the platform should be automatically recognised by the image. If it is not, select the appropriate platform for what image it is. It's a 1941 selected that if it's a toy 9 11 so on. Select that, and then we should also select the default ram for what is appropriate for that device. You can usually find this over on Cisco's website. In fact, this link here check minimum maximum RAM requirements. This takes you over to Cisco's website, where you can look up your device and see how much RAM came with this device or this particular model of the device that you're looking for. And it will let you know how much RAM came with that, so you should set it to that amount. If you have too little, a lot of times, the device won't turn on. If you have too much, sometimes you'll run into trouble. So I would go ahead and look up the amount that it's supposed tohave and add it there. The sea 7200. The base model came with 256 megabytes of RAM. So that's what I said here. The chassis item here in the previous page that you could just leave blank that that's no problem. So moving forward this now gives you the option to add what cards, what lying cards We want into the available slots on our device. Here we have, ah single management fast Ethernet interface. And here we have a two fast Ethernet interface. Where is too fast? Ethernet interfaces on that one card, we can add a bunch of different types of cards. Here. You can add cereal cards, gig Ethernet, standard Ethernet, fast Ethernet. You can add whatever you would need. Whatever you're looking to test with, you can change this later. In your template. You don't need to settle with this now and then create a whole new router. You can change this later, even on per device. After you've added your device to your lab, you can shut down the device and change what cards are in the device. There. The Idol PC Finder will need to go ahead and click that once you do next, it brings you to this page and you'll need to click the button for idle PC Finder. This goes ahead and finds the value that's needed for the idle CPU on the emulated device. It's gonna take a couple of minutes. It might hang for a little bit. Just let it finish its thing and you'll end up with a bit of text here. Ah, Hexi Decimal value that it will have after it finds the appropriate value. And then we can go ahead and click finish. And after that we've got our router template added here now and that we can go ahead and use this IOS device in a project and weaken, click, start and watch it boot up in our solar party and be able to enter in our commands and use that in our labs. All right, so now let's go ahead and switch over to the VM. We're going to run through all of these steps here in a live environment. If we run into any problems, will be interesting that I did run through this before and uninstalled everything so we could start over. Hopefully, it all happens without any hiccups. But if it does, then we're gonna do some live troubleshooting. It'll be a good time. So let's go ahead and jump back over to my VM here and let's get started. First up, let's go ahead and download virtual box. So if we go download virtual box so here I'm gonna go over to virtual box dot org's to the download section. I'm just checking. Yup, we are at virtual box dot or go Go, Go and download for Windows hosts, and that's downloading virtual box. Now, while that's going, I'm gonna head on over to Jean history and download genus. Three. Already have an account here. Actually did. As be Jacobson at none dot com and pop in my password. We'll go ahead and download GNS three, and that's going here as well. So we download virtual box. Let's go ahead and get that installed. They're ago is just a regular next next finish kind of installer. I'm gonna leave everything at their defaults. Don't go ahead and click. Yes, that this is the warning that your network will temporarily reset. We'll go ahead and do install. And yes, we have the USC prompt here to make changes to the computer. Don't let that finish up here. Excellent, so we don't need to start virtual box right now. We'll go ahead and click. Finish awesome. So let's go ahead and get GNs three installed. Just like before. It's a real quick next next finish. We'll just accept the license agreement. Leave everything at their defaults. There's no need to change that here. Go ahead and click. Install and this one will take just a little longer. It does have some other applications to install. NP cap and wire shark will see Will end up installing. Here's the NP Captain Stoller. Go ahead and agree to that license agreement. We can leave everything it defaults and just click install and that is now completed. Will cook next and finish that closes. And now GNS three continues downloading wire sharks and that can get installed. This is still live. It hasn't frozen. We're just waiting for why her shark to the finish installing there never go and then just getting solar party Excellent. Since I had already installed that previously I did uninstall it. But it apparently left some registry keys saying that I had already entered my email address So it did not ask us again on Dhere, you can choose to download the solar One standard tool said if you wish we don't need Teoh . It does include some very useful items, though I would recommend checking it out someday. But we don't have time for that right now. Excellent. So now we can go ahead and start GNs three will click Finish takes it a few moments for Gina's three to start up. There we go. Excellent. All right, so then, just like before, we'll click to run appliances in a virtual machine. And yes, this is we can all leave the defaults and the connection was successful. Excellent. Not saying VM Ware of'em Ron Tool could not be found. That's no problem. This is because we're using Virtual Box and not VM ware to go over the virtual box. It's saying that the G. M s three VM could not be found, and that's because while we haven't downloaded or imported it yet, so let's go ahead and click the download button here, and it's a direct link over to our VM download, and that is going through and downloading right now. So well, that's running. We'll go ahead and leave that there for a few moments. I do have the i o U L. Two image right here. I'm gonna copy that over to my desktop just so we have that available and then same thing here for the C 7200 that we're gonna add that in as well and his pop that on the desktop for us. Excellent Great Net download here for the genus tree. VM has finished. Let's go ahead and extract that here, and I'm just gonna pop it into our downloads folder. Give it a few moments for that to extract, and then let's go ahead and open up virtual box and that's extracted. Now this guy's here saying it's inaccessible. I had deleted the VM but did not remove it before I uninstalled virtual box. We're just gonna remove that. I'll go ahead and go import from the local file system. Click the browse button here. I had extracted this to our downloads folder Sin. There's my VM here. This is the O. V. A. File. We'll go ahead and click open and then here's our appliance settings. We're gonna leave all of this at defaults and we'll just click import. And there that goes off importing. Gotta love on the accounts up. This usually doesn't take terribly long. I know that the a t a is going up significantly right now. This is all live, and I have not cut any of the time out from this video or from the process here that I would like to show you exactly how long this usually takes from a real world environment so that you're familiar with it and can get this set up on your own without a problem. So we'll go ahead and let that finish here. There we go. And I did not speed that up. That did just jump forward on its own there. And once it got past the main virtual disk, everything else was imported pretty quickly and that was no problem. Awesome. So then we can go ahead and leave this all as it is. We don't need to start the VM that will come back to GNS three. Click the back button, click the next button, give us the error again. That's no problem. It will click virtual box. And now we've got G N s three VM listed as a virtual machine. And there we go. Now we'll go ahead and click next. And then now we are waiting for the server. This is when it's going through and starting up the VM on its own. Now, this is interesting that this ran into this issue here. I ran into the same problem earlier, So maybe if you run into this, then you can use the same solution. This is saying that it failed to open or create the internal network host interface, networking and the host Onley. Ethernet adaptor was not found that it couldn't start the virtual machine because it couldn't find the host only Ethernet adapter. What ended up being the solution formula? This is I had to go over to our network and sharing center. I went to the adapter and just disabled and re enabled the host only Ethernet adapter. So if we just go disabled and enable, let's go ahead and give that one more shot here and see if now that successful that looks much better there now is it's actually running the VM, and that is booting up. It's actually a Olynyk svm that GM s three uses to run the appliances. It's au bon to VM. Specifically, we're gonna have to wait for GM s three here for the VM to actually start up in boot before it will continue here for us. And that was my mistake. Let me just head back to our environment here, Eric, Go. And it looks like that VM booted up and then now GNS three is happy. We've got nice green dots on both our VM and our host machine here as well. Excellent. So now let's go ahead and let's create our template. Our IOS file First a student New obsesses IOU. Let's go to the IOS router will go new. Will run the IOS router on the genus tree VM Select our IOS image that's on the desktop for the C 7200 router. Yes, we would like to decompress this Iowa's image. There we go. Go next can leave the name as it is. It automatically found our C 7200 platform and actually just give you a look here that we could access one of these other platforms here as well. And the default Ram. I happen to know that this image uses 256 megabytes by default. In the event we clicked this link here, this would take us over to our Cisco Feature Navigator, where we can look up the ram required for our image name. Go ahead and click next. We only have one fast Ethernet interface there. Right now, let's go ahead and add two more fast Ethernet interfaces and click next here will do our idol PC Finder and let it find the idle CPU value our Hexi decimal value that's needed for that. As I mentioned in the presentation here that this takes a little bit. It took up to about a minute or so for me. It could take longer or shorter for you. It runs through some operations to try and find the optimal value. And there we go. That has been found here now and we can go ahead and click. Finish. Excellent. So now we have our C 7200 template there. Let's go ahead. And since I have my IOU image, let's do new. We'll run this. I will. You image on the DNS three VM. Let's call this lto IOU, and we'll select the IOU image that we put on the desktop here as a quick note. If you purchase viral V. I. R L. The emulation software from Cisco, it is totally legal to export the IOU image from viral, however, as well. Honestly, if you Google, I owe you image. GNS three download. There are many places out there that you can go ahead and get this downloaded that it does technically violate their license agreement. So keep that in mind. If you're not okay with that, then you might want to go ahead and purchase viral and export. The license from there otherwise can go ahead and obtain in other ways. So it's decompressing or uploading that image. Go ahead and click Finish. And now I've got our I owe you our layer to switch image. There we go ahead and click. Okay, All righty. Now, just as a quick little thing, let's do a new blank project. We just call it untitled. Let's go into our list of devices here. Let's put in a switch and two routers. We can go ahead and connect these guys there. We go on, Let's start it all up. I know this is one item is that you will need to configure an IOU license. We won't go over that right now, but as well if you go ahead and Google g N s three i o u r c file, you will be able to quickly find the resource is needed to create that file. It's not hard. There's only a couple lines that need to be added and you'll be up and running with the switch images here. Let's go ahead. And we can also connect these two guys so that we have to operating devices connected and that we can convene next to these to the council. There's solar party opening up. You've got our to open here and it looks like our 1 may not have opened. Just double click on it to open up the consul. And there it goes. Excellent. And you can see here we have our router. We do a show version. We've got our 7200 IOS software and that right now what I connects these guys with, I connected them. Teoh Fast Ethernet one slash zero On both sides I go a convict t into fast one slash zero go No shut. Same thing over here. Let's go into fast. One slash zero will go No shut and then let's do a show. CDP neighbor hasn't come up quite yet. My taking a few moments, and there it is. We can see our neighbor there and over here, if we go ahead and refresh what's it's now showing up quite yet here, But that's no problem. I'll just be taking a little bit for to update, and we can see our CDP neighbor there. And now we've got our operational routers and you have a working GNS three environment that there is an Internet switch that you can use here in GNS three. Or like I said, you can add an ether switch module to your routers and be able to do switching in that fashion if you'd like. Excellent. Thanks so much for going through this with me. Guys, I hope that this has been informative for you, and I'd like to thank you for viewing. 3. Working with physical devices: tips for setting up a physical ccn a lab. Ah, lot of the people coming into this course are brand new to the industry or at least knew to networking and may have never touched networking devices before. Or you may be long time in networking and that you're just looking to get your certification now, in which case you could probably just breeze over this. But for those who are brand new to the industry, I wanted to give some tips and suggestions as far as how to set up your lab so that you can do and test out the commands and configurations that you'll see in this course and what to get if you're looking to get a physical lab. So let's jump right in here. Is that why would we go physical? And why would we go virtual? So there are some aspects of having physical that are not easily learned, virtually things like cable management and chassis features. They're just not easily learned virtually. You know some of these routers here they have physical flashcards in them where it stores its device configuration, and that that card can go bad sometimes, and it's good to know where that's located and what it's like pulling that out and putting a new one in so that you're familiar with working with the physical device that you would likely see in your job role. That all of the logical configuration, of course, can be done virtually in G. N s three that we talked about in the previous videos here. But there are some things that you just can't quite do virtually and actually having hands on the device and plugging your consul cable into it and using your laptop to get access to it and rebooting it, watching how long that actually takes. Is that something you can't really get virtually that you would need to work with the physical device in order to see this, and that can be very valuable. It might be good to pick up Ah, switch or a router and go ahead and work with that just so that you're familiar with it. In the event you don't have access to that in your job place. There are some common tasks, like password recovery that cannot be easily performed on a virtual device as well that setting your configuration register and booting into rum on mode and odds bypassing your startup configurations so that you can do a password recovery. That's something that you cannot easily do on a virtual device in GNS three and as a network engineer. Personally, for me, I feel like it just feels good having a rack of your own equipment and being able to set that up and plug in your cables and work with the individual physical devices. Now, of course, this could be expensive, and then also, it's just not necessarily practical or realistic. You may not have a lot of space at your home or residents. You might not be able to store this rack here that's about the size of old CRT. Monitor a large one sitting on your desk or on the floor that you also might not have the money for it to really go out and buy these things. Honestly, it's not terribly expensive, and that for about $100 us that you could go ahead and pick up a CCN a lab off of eBay. Depending on where you live with shipping and all that, you only need older devices. You don't need anything brand new, get Ah, 35 50 switch or 37 50 and pick up old 29 11 router. And there you go. You've got, you know, $100 ccn a lab where you can go ahead and set up a lot of things. But with that, there's a lot of apologies that you just can't do realistically with a physical lab, mostly because it requires a lot of devices that if you have a topology with 678 devices in it and you want to make something really large and get the feeling for what it's like to get multiple routing protocols set up all redistributing into each other than setting that up in a physical lab is just not realistic or very practical that you would need to spend a lot of money. You need to have a lot of space, and there's just no need for it. When you can just set these up virtually and you're doing all your logical configuration there, there's you might as well. It'll save you time. It will save you money. It'll save you space. Use the computer that you have any way to go ahead and create these things and that lastly , of course, moving to apologies and implementing multiple apologies can be difficult or unrealistic in a physical lab. As you saw previously in GNS three, you can have multiple projects all open at the same time, or even just all available, so you can open them readily and have your running configuration available there. Immediately. Start up these devices, and they're exactly where you left them off and that you can switch between topology and topology. Switch between lessons very quickly, and that allows to really save you a lot of time that if you want to do a new topology on your physical device, while you're either going to a right a race and get rid of all of your configuration. Or you're going to be undoing your configuration yourself line by line to go ahead and apply a new configuration and reuse some of it very manual, tedious process that can be very time consuming. So there are some things that are good about getting a physical lab, and there's some things that air much better about having a virtual lab. Overall, I would recommend having a virtual lab just as your primary lab. But if you've never touched a physical device before. It can be really good, and you get a lot of experience just having one device or two devices and to set them up to plug them in and watch them boot up. And to get the experience of what this is actually like, if you don't have that ability at your current workplace, that that might be something you want to dio just to get the experience of working with the physical device once or twice. And then you could even sell off the devices from there. But your primary lab should probably be a virtual one with GNS Tree just because of the items that we discussed here. Now, if you do go for getting some physical devices for your physical lab, here's what you would want to get the CC ed A. It touches very lightly on routing that we only do some static routing and single area Oh, SPF. You don't need a lot of routers. In fact, more of what we're going to be doing is all in regard to switching and ah, lot more of a broader range of things like touching on Wireless and Cisco D n a center, which, unfortunately, these things are much more expensive and much more difficult to get set up and cannot be easily virtualized or emulated in GNs three. That for a wireless controller I wouldn't recommend buying one of your own unless you're able to get one and a really good deal. Or unless you're looking to go into the CCMP wireless track that the wireless controllers are typically rather expensive. The actual access points are very cheap, but unless you're planning on going to the CCMP wireless track, everything that we cover in the course here will be plenty for you to be able to pass the exam. You don't need to get something for wireless now is Farrah Switching goes getting three catalyst, 35 fifties and 35 sixties. That will totally suffice. Now the switches there layer three switches. They don't do net. That is the only feature that we cover in this course is faras routing and switching goes, which the 35 fifties or 35 sixties will not do because they're just not compatible and source net is covered in the course or exam. If you want to practice doing source. Net than I will go ahead and either emulate a device, a router, ingenious three. Or go ahead and pick up. Ah, very cheap router, an old one that you can get for 30 $40 on. Be able to set that up and do source. Net. We do cover all of the syntax and go through a live lab in the course here, so it's not totally necessary. But if you want to practice it, then you would need a router for it. I recommend gang your devices, of course. Secondhand online that you can get these old devices you were going through a big infrastructure. Refresh that a lot of layer three switches have become very cheap, and a lot of organizations are all upgrading their infrastructure pretty continuously, and you can find these older devices 35 fifties 35 sixties really cheap online. We're talking like 20 bucks apiece, or maybe a little more, and that you're really just paying for shipping and that I would recommend getting a couple of those second hand. Do not buy these brand new. They're very expensive. You'll be getting a little bit of sticker shock if you look at what a brand new Cisco switch cost. Of course, a business organization is making an investment in this, but you, as an individual who was just studying for your certifications, should not be getting the newest in the best that we can go ahead and just practice our configurations and practice our setups on some older devices and that I do recommend picking up layer three switches eso. Then that way you have both basic routing and layer to functionality that all of these ports on a layer three switch Can Albee layer three ports. They can all be routed ports on that. You could have separate interfaces and or interface V lands and the lands throughout they can do dynamic routing with O S, P. F and ei GRP. You can go ahead and set up Ah, lot of these things, like I said, except for net on these devices and be able to do a lot of the tasks you would do on a router. But on a switches, well, she really get double for your money. If you're looking to go further with your Cisco certifications, CCMP and beyond, then Mawr equipment will be needed. Or like I said. Just set it up in a virtual lab environment that you may want to pay for Cisco's offering. A viral V i. R L. That this is Cisco's branded virtual lab environment that has the ability to emulate ah, lot of their own devices and that that's really a good direction to go. That does cost a yearly licence, but it is not. That expensive comes out to be about $10 a month, I believe or might be $20 a month. That's U S. Dollars to go ahead and get Cisco's viral. If you're looking to study for your CCMP or C C I E. That really might be the way to go if you don't have access or don't want to spend the money on a whole lot of equipment, that you'll end up needing to study for these things. Awesome. So finally, let's just wrap up with some tips here. Be mindful that obtaining an updated IOS image requires a service contract with Cisco. Almost all of the devices you're going to buy online make sure that you read the fine print . Of course, they're going to come with an IOS image loaded onto the flash already. It's not guaranteed that that flash memory is totally uncorrupt and is OK, but you could be reasonably sure it is as long as they state that it is in the cellar that your purchasing from, but that in order to obtain an updated OS image that requires having a service contract, you cannot go online to cisco dot com and download a new updated IOS image without paying for the service contract that this technically applies to both physical and virtual labs. This is why I suggested in the previous video that you purchase a device and then go ahead and offload the image from it so you can use that in GNS three, and people duplicate that device. Many times these images are available online, you can go download them up. I would never use any of these publicly accessible images in a production environment, but in your lab, and you certainly could and go ahead and do that. This those violate Cisco's license agreement? Be mindful of that. If you're okay with it, they are available out there. I can't tell you where, exactly, but if you search, it is available pretty easily at that accessing a physical device at the consul does require a consul cable. Remember that you need to buy a council cable. A lot of the newer devices are going with this micro USB council cable, but all of your older devices pretty much or using the serial RJ 45. So this is your eternity, Jack. Right you are RJ 45 Jack and that it is a serial RJ 45 that this either comes to the end of a serial connector or a lot of them have a built in converter so that it is us be on one side, otherwise going to get a serial to USB converter. Just be mindful of the fact you will need a council cable when you buy these devices in order to be able to access them really at all, because you need to get into the console to configure a I p address and be able to set up Ssh, tell Net and that you'll need a council cable just to get to that point. And that finally, building assist physical lab really just doesn't have to be expensive. Older devices generally have all the features you would ever cover in CCN a or CCMP and that you can go ahead and purchase 34 devices for less than 100 U S. Dollars and be able to have a full ccn A or CCMP lab set up. And you own this permanently and be able to work with the physical devices on. And you don't really have to break the bank there. Awesome. Thanks so much for heading through minutes with me. Guys, I hope this has been informally for you, and I'd like to thank you for viewing.