1 00:00:00,240 --> 00:00:03,150 So let's create our first project in three. 2 00:00:04,250 --> 00:00:05,730 At this point, we have a choice to make. 3 00:00:05,730 --> 00:00:12,030 So whether we run three on the local server or within a virtual machine. 4 00:00:13,050 --> 00:00:19,090 Because the primary reason for using Gns3 is simulating a network with switches and routers. 5 00:00:19,110 --> 00:00:25,080 All we have to do is select the run only legacy iOS on my computer. 6 00:00:25,350 --> 00:00:28,170 That's the option which is not selected by default. 7 00:00:29,860 --> 00:00:33,040 So we leave this page with the rest of the default values. 8 00:00:35,770 --> 00:00:41,080 It asks for the root permission for Oubridge to interact with a network interface. 9 00:00:41,080 --> 00:00:44,950 So click yes to allow and enter the admin password. 10 00:00:45,890 --> 00:00:51,500 Local server is started up and gns3 connected to it successfully. 11 00:00:51,500 --> 00:00:52,970 So click next. 12 00:00:53,540 --> 00:00:57,020 Finally, we have the summary of the project settings. 13 00:00:57,020 --> 00:00:59,930 So click finish to end the project setup. 14 00:01:01,420 --> 00:01:06,320 So as soon as you click, finish the new appliance template window appears. 15 00:01:06,340 --> 00:01:12,340 So at this point, we're going to add an iOS router using a real iOS image. 16 00:01:12,340 --> 00:01:15,820 So select the option and click okay. 17 00:01:16,600 --> 00:01:24,430 So I'm assuming that you're a first time user of Gns3 and as such, you need to be aware that in order 18 00:01:24,430 --> 00:01:31,060 to use this application software, at the minimum, you need to download one more piece of software. 19 00:01:31,420 --> 00:01:36,970 So we already downloaded and installed the Gns3 software itself, which actually comes bundled with 20 00:01:36,970 --> 00:01:39,340 a whole bunch of other stuff which isn't really needed. 21 00:01:39,340 --> 00:01:45,250 And then you're also going to download at least one Cisco iOS software image. 22 00:01:45,820 --> 00:01:53,860 I would suggest that you get hold of software images that support either the 3725 series router or the 23 00:01:53,860 --> 00:01:56,290 3745 series router. 24 00:01:57,050 --> 00:02:00,650 If you can get hold of these, that'll be the best. 25 00:02:01,410 --> 00:02:09,509 So if you don't know anything about Cisco routers at all, you're just looking for some advice on which 26 00:02:09,509 --> 00:02:12,040 particular one to choose for your iOS image. 27 00:02:12,060 --> 00:02:17,070 I would select a 3007 25 or a 3745 image. 28 00:02:17,280 --> 00:02:23,730 If you get software images for one, that's 3700 series of routers that comes along with like a switching 29 00:02:23,730 --> 00:02:24,540 module. 30 00:02:25,410 --> 00:02:27,800 You don't have to download anything else. 31 00:02:27,810 --> 00:02:29,550 There's nothing that you have to do. 32 00:02:29,550 --> 00:02:36,450 But basically you can turn on a switch that operates within or inside of that router, and then I can 33 00:02:36,450 --> 00:02:37,980 do this switching and routing. 34 00:02:38,010 --> 00:02:41,700 Most of the other platforms do not support that. 35 00:02:42,360 --> 00:02:47,670 So in my particular case, I'm going to use a 3725 image. 36 00:02:48,990 --> 00:02:57,030 And now I get to the point when we get to choose what iOS image we want to import into S3 And here is 37 00:02:57,030 --> 00:03:02,250 where you get to browse for wherever you've downloaded the Cisco iOS software to. 38 00:03:02,400 --> 00:03:06,480 I'm going to use a 3725 image, which I've already downloaded. 39 00:03:06,720 --> 00:03:14,100 If you don't have it already, please search for the keywords such as Cisco, iOS 3725 Image download 40 00:03:14,100 --> 00:03:17,460 and you'll find an image and then download it for yourself. 41 00:03:18,290 --> 00:03:21,890 I'd love to show it to you, but I don't want to mess with legal issues. 42 00:03:21,920 --> 00:03:24,800 It's not so hard, and I'm sure that you can easily find one. 43 00:03:25,740 --> 00:03:29,910 Now, click Browse to select the iOS image. 44 00:03:30,240 --> 00:03:31,530 So let me find my image. 45 00:03:31,530 --> 00:03:32,130 Here it is. 46 00:03:33,680 --> 00:03:35,840 Select it and click open. 47 00:03:36,780 --> 00:03:39,780 And yes, I would like to decompress the image. 48 00:03:42,370 --> 00:03:43,630 So click next. 49 00:03:43,990 --> 00:03:44,920 Give a name. 50 00:03:45,580 --> 00:03:47,320 Make it up whatever you want. 51 00:03:47,710 --> 00:03:50,530 I'm going to choose C 3725. 52 00:03:50,560 --> 00:03:52,150 That's pretty good for me. 53 00:03:52,330 --> 00:03:59,200 So now before I leave the screen, there's also a little box here that says this is an ether switch 54 00:03:59,200 --> 00:04:05,770 router, so you can just have every router in your topology as an ether switch. 55 00:04:05,860 --> 00:04:08,240 I'm going to leave that unchecked for now. 56 00:04:08,260 --> 00:04:10,930 We'll create a legacy router right now. 57 00:04:12,380 --> 00:04:18,740 So make the default ram 256MB and then click next. 58 00:04:19,130 --> 00:04:25,070 So here's where I get to select what modules or port adapters I want in my chassis. 59 00:04:25,840 --> 00:04:34,330 It comes with a fast Ethernet slot already on it, and now I've selected in another slot so I can put 60 00:04:34,330 --> 00:04:38,780 another fast Ethernet card and then I'll put another fast Ethernet card. 61 00:04:38,800 --> 00:04:39,520 Why not? 62 00:04:39,550 --> 00:04:43,990 So as I go forward, I've got some wick slots available. 63 00:04:44,940 --> 00:04:48,240 Once again, these slots are available in the 3725. 64 00:04:48,240 --> 00:04:53,400 Depending upon that software that you're using, you might not have all of these available to you. 65 00:04:54,280 --> 00:04:58,840 So I'm going to put some serial interfaces in these slots. 66 00:04:58,840 --> 00:05:06,700 So I'm going to have tons of interfaces in every single one of my routers to give me lots of flexibility 67 00:05:06,700 --> 00:05:10,210 in the types of topologies that I want to design. 68 00:05:10,720 --> 00:05:11,200 Don't worry. 69 00:05:11,200 --> 00:05:14,560 I mean, we can change all these settings after the setup as well. 70 00:05:15,520 --> 00:05:16,990 So now click next. 71 00:05:19,410 --> 00:05:22,290 No, I don't want to waste time for the idle PC. 72 00:05:22,620 --> 00:05:27,840 We can simply say that it's used to make the CPU usage much more effective. 73 00:05:27,840 --> 00:05:35,070 So just click idle PC finder and let Gns3 find one for you. 74 00:05:36,020 --> 00:05:37,910 And now we can hit finish. 75 00:05:42,010 --> 00:05:44,530 And a router is available to us. 76 00:05:45,140 --> 00:05:47,930 Now we can use it in our virtual topology. 77 00:05:49,260 --> 00:05:49,560 All right. 78 00:05:49,560 --> 00:05:53,640 So here are the preferences of three. 79 00:05:53,640 --> 00:05:59,010 The router is added under the Dynamips iOS Routers menu. 80 00:05:59,490 --> 00:06:03,210 You can see the menu on the tree at the left hand side of the window. 81 00:06:03,210 --> 00:06:06,420 So click okay to close the preferences window. 82 00:06:07,720 --> 00:06:11,530 Now is the time to name our first project. 83 00:06:11,860 --> 00:06:16,420 As you can see here, the project location changes as well. 84 00:06:16,420 --> 00:06:18,010 When you change the project name. 85 00:06:18,010 --> 00:06:20,740 So click okay once you finished naming it. 86 00:06:21,370 --> 00:06:24,460 And this is your main three window. 87 00:06:25,230 --> 00:06:30,660 So now let's create another iOS router template and make it an either switch router. 88 00:06:30,690 --> 00:06:32,040 This time around. 89 00:06:32,870 --> 00:06:38,630 Now from the three main menu Select Preferences from the left hand Side Menu. 90 00:06:38,630 --> 00:06:43,940 Select iOS Routers under the Dynamips Submenu and Click New. 91 00:06:44,240 --> 00:06:48,110 We can use our existing image right now, so click next. 92 00:06:49,110 --> 00:06:54,000 And I'd like to turn this router into a switch by selecting the ether switch box. 93 00:06:54,330 --> 00:06:58,050 Let's go ahead and change the Ram to 256MB. 94 00:06:59,080 --> 00:07:04,690 So now you can see it automatically populates one of those slots with a 16 port switch module. 95 00:07:04,690 --> 00:07:07,690 And if you want, you can just leave it that way. 96 00:07:07,690 --> 00:07:13,360 If the only thing that you're planning in the router is for 16 port ethernet switch. 97 00:07:13,930 --> 00:07:14,710 But. 98 00:07:15,200 --> 00:07:17,630 What I want to do is add more flexibility. 99 00:07:17,630 --> 00:07:21,800 So I'm going to add some more slots just like the previous scenario. 100 00:07:23,070 --> 00:07:25,200 Let the app find an idle PC. 101 00:07:35,710 --> 00:07:37,210 And then click finish. 102 00:07:37,780 --> 00:07:40,310 Now we have two different router templates. 103 00:07:40,330 --> 00:07:45,490 The first one is a classic router and the second one is an ether switch router. 104 00:07:45,760 --> 00:07:52,540 Now you can click edit to remove or add new slots, change a name, change a size, whatever you want 105 00:07:52,540 --> 00:07:53,770 to do to customize it.