Virtual Labs - GNS3 Setup

1. Cisco Lab Options

So first thing, there are three different options we can use for the lab setup. The first one is like going with a physical setup, which is quite expensive, especially at the level of students who are practising the options. I'll go through with the overview of this physical lab set up. You will probably probably need to have some dedicated Cisco routers and the ASF file before you can set up your own app. But again, there are some alternatives where you can use some of the simulation tools. In the simulation tools, you can simulate routers, some switches, switch images, as well as the AC 500 modes. As a result, I rarely use simulations. There are different options available, like the Cisco packet tracer options. So if you actually visit the website of a specific packet tracer website like in the slides, I've got the links here, you can see the Cisco packet tracer network.com. Again, this is a very good obligation, especially at the CCNA level. So I can say at the CCA routing switching level and some levels of CCNP routing switching, it's a good option, but mostly at the switching level, not in the routers because most of the advanced routing options don't support this. And again, there is a version of six dottwo which supports as a firewall you can simulate. You can simulate some other options as well. And as for the current version, you can see there is a seven-one version, which is the current version for the lease seven one.I think you can see the seven one-two, which supports some of the wireless land controllers and some access points with some firewall capabilities. However, I prefer this at the CCNN routing switching level, but it is not recommended if you are using some advanced options. So probably if you want to do some basic routing or the basic ACL labs, it's a good option, which uses a lot fewer resources and you can drag and drop the devices and manage them. As an alternative to the Cisco Packet Racer, there is Bosom Netsing, which is also licensed. Again, similar to Packet Racer North, it doesn't support more advanced options. It's good at CCNN and CCNP routing switching because you can mostly practise most of the CCNN level lapse and some level of CCNP routing switching, but again, for most of the advanced options, it's really not preferable. So if you're thinking about advanced options like NPRI level, probably at expert level, there are some alternatives like GNS three, which has been for a long time crafting network simulators, which I'll be using for most of my labs. And now again, there are some other options, like VRL virtual Internet outing lab, and then there is something called Eve Emulating virtual environment.So those are alternatives for gym three. Again, Genesis, I'll talk about this more in the next video, but most of the gymnastics options apart from that, we have something like a virtual internet routing lab. This is from Cisco. It's like a virtual programme where you need to get a licence for something around $199. It depends. It's a good option, especially if you can go for the licence options where you can simulate most of the iOSor iOS devices. These are the actual virtual images from Cisco. Download them from Cisco. Then you can simulate routers for a simulated service for routers, specifically XE orASAP or even to some extent, excess and other options. But again, the drawback is that it requires a little bit higher end server. You need to set up a high-end server with some good configuration and also you need to get a licence for it. It's not a free source, so you probably need to get some licence for this one. So I recommend you go through these options, but I've never used them in practice, and I really prefer this option because I've been using Genesis for more than ten years since it was in a commandline, so it's a little bit easier for me to go with GNS three, even though there are some limitations. So we will see more options, like probably something called "Emulated Virtual Environment," which is, again, you can download the image in the BMW and you can run these images. These are the iOS routers, or iOS overuni Linux, probably. If you have these images, you can also simulate some additional devices. So most of this is also supported on DNS three, but again you need to figure out which product or which device you want to simulate and you need to figure out how to do that because in this course I'll probably mostly be showing you how to simulate the iOS and the ASAP images inside the GNSI, but you have a couple of multiple options available in general which you can use for simulating the labs. So if you are thinking about advancing your skills to NP level or expert level, probably Genesis is one of the best options, and the equivalents are all these options. Alternative options which you can also use are finally, something called Rack Rentals. Again, rack rentals are more preferable when I'm doing myCCI studies for routing, switching, or service borders. Next, I'll probably be using most of the simulation tools, so I can simulate like 70% to 80%, or maybe some 90% of the things that can be tested. Let's say you want to test some features that are not available in the simulation tools. You can probably go with either a physical rack if it is available, like let's say you do work for a company where you have some additional devices in the storeroom and you can probably use them for testing purposes. You can either use it that way or That's how I did it. Or else you can probably go and search online for track rentals. You'll find plenty of vendors available on the Internet. So if you just search for the keywords,like CCI Rack Rentals or Cisco Rank Rentals,you'll find different vendors offering accent options. So just see what exactly the services are. Check the reviews, and you can probably book some online.

2. About GNS3

I'll talk for a few minutes about genetic simulation tools. It's an excellent alternative for real labs because, well, setting up your own lab using some physical devices is really not a good option because most of the silver actually covers some updated iOS versions, and based on the new products, which are not easy, they're very expensive. Again, adding a router as a firewall and setting up your physical setup is really not a good option. So the alternative is that you can use any of the simulation tools. So I'll be using GNS Three for most of the labs here, and I've been using it for a long time. There are different versions like zero X version oneX and two X version, the current one. Most of these are gone now, not supported by most of the operating systems, and they are not necessarily compatible with most of the operating systems as well as the new images coming up. So the good thing about this is that you don't need any dedicated hardware like router switches or physical firewalls, you just need some virtual images which can be used to integrate with this tool and run like a rack reel machine. To use the Genesis, you need to have your own copy of the operating system, which means typically iOS. Like, if you want to simulate an iOS router,you need to have your own copy of the Cisco iOS router image, the dot bin file. You can also simulate some Ivy IO programs. Again, these are the files used by Cisco for internal testing purposes. We can use this one as well. security devices. So if you have an ASA image, you can probably integrate with GNS Three and you can simulate firewall IPS devices, XR devices, Juniper and more. So if I just go to the website, if you search for GNS three supported devices, you can see here that this is something that has different options. There are some additional URLs that demonstrate the differences between GNS Three and other simulation tools. But here you can see the device support. There are plenty of devices that it supports. So this is what you will see. The appliances are different appliances. Again, you need to figure out how to use this and also you need to have the specific images to run. You can integrate into the Genes Three and you can run all these different devices like Cisco and XOV. You need to have the virtual image downloaded from Cisco or IO Ul Two. There are different options for ASAP as well. Our focus will be mostly on this here. So Genesis is now a viable option, particularly if you want to advance your skills and test the majority of the features on most technologies on a virtual platform.

3. Installing GNS3 – Windows

I'll quickly show you some basic steps you need to follow for installing the Genesis. So in general, you'll find all the support documents on the Genesis website. So I'm not going to show the installation because you already know you can use these links to go to the gymnastics website. So it will show you what the basicinstallation steps are, like what the supporting operating systems can be installed or if you're using some Windows machines, either 64 bit or 32 bit. You will probably probably need to download some 32-bit version of the gym to install that. However, the majority of the operating systems supported here meet the minimum requirements. You can go with Windows seven or later operating systems with two or more logicalprocessors supporting virtualization features because, in general, most of the processors support something like VTX features, which is required when you are setting up the GNS three with VMware. When you combine this with VMware to run some iOS V or ASAP devices, I'm probably running some IP devices with those images. So make sure you have a processor with this feature enabled, or else your processor may support it but be disabled in BIOS versions. So the minimum RAM is around four GB, and it's recommended to have at least eight GB of RAM and at least one GB of available space on your Windows machine. So there are some other requirements, like the recommendation to have at least eight GB RAM, and of course, optimum requirements. The best requirement you can go with is seven with the four logical processors. If you're running a very high-end setup with a lot of devices, you can probably probably go with this requirement. I've got some videos that you'll probably find on the same website, which will show you the same steps. You can either follow the video or just follow the steps as per the screenshots here. You need to click on this generously.com website. So once you go to the website, you'll find the free download link. So once you click on free download, you can probably accept that you need to sign in if you're logging in for the first time or if you don't have any GNS account. And then once you log in, you will see the download page and it will show you the options like whether you want to download for a Windows machine or for the Linux operating system on the Mac. different sets of files you'll find. So you need to download this, probably the GNSI version, and also you need to download the GS three VMs. This is required if you want to simulate some iOS V or ASAP images probably.I do recommend you download the same and this version should match, which means if you're downloading a genus 3210 version, the VM version also should be the same. So if you're downloading two, and if you are downloading the VM, maybe a different version,maybe some other version that doesn't support it. So, on the generous website, you will probably have the latest one, probably the latest one. You can go ahead with that. Maybe in my mission I'll be using some older versions. So once you click on Download, you'll find some things similar to this one, and then you will see the downloadable file. Of course, the downloadable file shows you some older versions, but you may download some newer versions depending upon when you download, because the current is this while I'm recording. You may see a new version come up if you are downloading after two or three months. So it's all in one file. You need to click on that file setup file and then you run that particular application and simply follow the step by step process, like clicking Next,Next Finish, and then you agree on this. These are the supporting applications it will also download. You can probably skip some of this and have a quick overview of those applications and what they do, such as ViceChar, which allows you to capture some traffic and other options. Here you can go through with these options, but generally I just set all the applications and install them. And there are some applications if you uncheck your GM stream that may not work properly. So you can probably just check which specific applications you want. But generally I don't disturb, I just go with Next and then again at the same time, you'll see multiple applications that will install. Like this one, Vinyacap is an application which is compulsory; you need to run. There are some compulsive applications in PCAP and once you finish the Winter BAP application installation, you also need an active Internet connection to download some supporting files from the Internet automatically. It will do that. So make sure that you also have some active connection while doing the installation process and then install some Solar Winds response time viewers set up. And then once you finish this installation again, it will ask you if you would like to register a free licence for this one. If you want, you can just say "yes" or "no" and then finish. So once you see the screen, probably in between, you may probably install many other supporting applications. And when you finish clicking on this option, it will open up the GNS three. Or you can open up the GNS three from the shortcut that you'll find on the desktop. Of course, it's the same logo you'll see and it will automatically redirect to the GNC website. You can use some documentation, which will help you with any other future installations.

4. GNS3 - IOS Images

Now once you are done with the installation of the GNS Three Setup Wizard, you'll see this first screen, and as I said, this particular webpage has all the details. If you want to get some more details on GNSThree, what it supports or not, you can use this link. You can click on it to probably add the images. So in this video I'll probably just quickly show you some steps on how to add the iOS images. Again, to add the images, the first thing you need to have some iOS images, which should be present on your machine, copied into this. Again, if you have an official Cisco login and can download some images from the Cisco website, or if you have routers, you can probably take a backup of those images and use them integrated inside the GNS Three. Second, as I said, this is a separate page which will give you the same thing. You can use this link, probably in myPPD I'll be adding those links so you can use the same links for verifying. And I got some videos added here. You can probably still follow those videos to go with the basic setup. So here we'll be seeing how to setup the GNS Three with the local router. So these are the first of what you'll see. So, if you have a GNS three installed now, you have several options for running iOS or Ioev, and this is the option we usually choose. Or you can run some legacy iOS if you want to run GNS Three only for iOS. Or you can also do it through reward servers, mainly for advanced users. So generally, we use this first option when you select Next or if you're already installed. And if you want to go generally to the Setup Wizard, we can go from Help and from here you can go to Setup Visa. Okay, so you can simply go here, like this is from the Help. You can go to the setup page here. So generally, we select the first option and then it will select some default settings like the host bindings. If you're using the iOS images, just select the normal options and click on Next. And if you're using some genus three VM, you probably need to do these settings. When you're integrating with JNS Three with VMs, this is probably something you need to do. I will just show you the basic legacy option at this point in time. If you're using this, then you don't need to actually integrate with VMware. So at this point in time, I'm just going with the iOS. So if you just go with Ibis and if you don't want to use any ASAP or other options, go with the second option and then click Next and then Finish. So after that, you will see some multiple options, like if you want to add the iOS router. So now we need to add the images. So we can either add the images directly from thisbizarre and then click OK and it will ask you to use an iOS from the local router or local computer, so we always use this option assuming you are not using GNS three VM. So I'll show you the integration of the GNS threeVM in a separate video and then click on Next. Again, you can select a new image and make sure that you do have images on your machine probably. So select any one of these images, add that image, and then you can say "Click Okay" because I already added other images, so I'm using this one. So if you want to check the minimum ramp and the capabilities, you can click this link, which will redirect to the Cisco website, probably the Cisco Feature Navigator. You can also check if you want, but generally I don't really recommend you just go with the next options and add the slots. Whatever the slots you want to add, select from here maybe one of the interface cards, and then click Next and Finish. So once you add this, you can see this platform is added here. And if you want to change any of the settings, you can always select the Edit Option and make changes in the future if you want to. So you can see I already added some images which I'll be using for different sessions here. Now this is how you simply add these images. So either you can go through with the Setup Wizard, or in the future, if you want to do the same thing,you just go to Edit Preferences from the Edit Preferences and then you can simply go here like Ibis Routers and you can use the option of New and you can add from here as well the same steps.So this is how you can add the images. Because if you want to set up your DNSThree and you want to do some basic labs with the routing, you must add the iOS images. So, regardless of the platform images you add, you will be able to simply those platforms.

5. Default Topology - GNS3 - IOS initial Configs

The next thing we will try to understand is the basicdefault topology of what I'll be using in my labs, whether it is the CCNP routing switching or whether it is a security lapse There will be four routers here. router 1234 and this router is connected to clip links. Of course, serial links are not widely used in these networks, but just to have some basic connectivity, I'll be using serial links and IP addressing. And then there is an interface which connects to the LAN, and, of course, I don't have any switches connected here, but you can also connect a switch which simulates specific LAN connections and IP addressing. I'll be using something like ten network tenone one eight summit mask on the router 121. 230 and 40 on the router When you see any address with 1020-30.40, you can understand that these are the LAN interfaces, and for the van connections, I'm using s one by zero and s one interfaces, one subnet, one to two subnets on the router, one to two vancouver, and two subnets, three subnets, and four subnets on the vancouver, and I'm creating additional loopback interfaces on every router. The loop acts are like logicalinterfaces, which we'll be using for simulating logical connections As if we are assuming that this is my router, The router one, which is connecting to some multiplebranch offices, and because physically, if I use any of the physical interfaces, I need to have some connectivity and probably adding that many physical interface cards to the router is really not a scalable solution, we'll probably do the same thing as if we have an additional subnet, additional branch, or maybe additional pieces for testing, then you can advertise these routes back to the next router and we can simulate. We can talk to these interfaces. We can advertise them. We can trace it to them. So the loop apps are not really the interfaces that we use in operation scenarios. They are just logicalinterfaces. So on every router, I'm creating four loopbacks, which will be pretty confident in my apologies. I will use them if I need them in some lab scenarios, or I may not use them at all. I expect you to know, so basically disable thedomain lookup because whenever you type in your wrong command it will do some DNS translations and generally it will probably need to stop this. To stop this, we use Control Shift Six, which is probably in the middle of the GNS three, and it is by default, so there is no need to do it in the new DNSversions. Using production at work is not recommended because, again, you may use DNS resolutions in the production scenarios. And then there is one new command called "No Keep ALApp." So this is to ensure that even if you don't, because generally when you connect any device to the switch or any opposite device, the exchange keeps messages so that if you remove the connection, if there is no device responding on the opposite side, it will simply show the interface down or locally unplugged, something like that on the PCs. So here we are not connecting any device, but just want this interface to be up without any connections. So we can simply say "no" and keep the same command we do on the physical setups. Again, in GS three, this is also not required because in the new Genes three, even though there's no connectivity, it will make the interface up. But again, best practice. You always use this in the lab scenarios, but it's not recommended in the production scenarios. Again, the rest of the confirmation is still the same. This is the initial confession, what I'll be using.

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