WEBVTT 0:00:04.720000 --> 0:00:09.940000 All right, welcome everybody to this presentation from INE on IP routing 0:00:09.940000 --> 0:00:14.320000 basics. I am Keith Bogart and I will be your instructor for this set of 0:00:14.320000 --> 0:00:19.860000 videos. So let me start by talking a little bit about what the objectives 0:00:19.860000 --> 0:00:24.480000 are for this course, who this course is aimed towards and hopefully what 0:00:24.480000 --> 0:00:27.200000 you'll be getting out of the course after you've watched it. 0:00:27.200000 --> 0:00:31.800000 So number one. I want to provide to you an understanding of what is meant 0:00:31.800000 --> 0:00:37.240000 by the term routing, why it's necessary in networks and the actual process 0:00:37.240000 --> 0:00:39.920000 involved in the routing of data. 0:00:39.920000 --> 0:00:43.140000 So before I look at the next two objectives, this should sort of set you 0:00:43.140000 --> 0:00:47.260000 up to the understanding here that this is really for CCNA level candidates. 0:00:47.260000 --> 0:00:51.480000 As a matter of fact, I would say that between the two CCNA exams, the 0:00:51.480000 --> 0:00:57.800000 ICND1 and the ICND2, this fits squarely into the ICND1 category. 0:00:57.800000 --> 0:01:01.660000 So for those people who are just studying out or starting out on their 0:01:01.660000 --> 0:01:06.020000 CCNA journey, preparing to take the ICND1, otherwise known as the CCE 0:01:06.020000 --> 0:01:10.400000 and T exam, and they have never heard of this concept of routing or maybe 0:01:10.400000 --> 0:01:14.500000 just barely heard of it and they want to know what is routing and how 0:01:14.500000 --> 0:01:18.340000 is it used, why do I need it, that's what we're going to be discussing 0:01:18.340000 --> 0:01:22.420000 here. This series of videos is not going to be an in-depth presentation 0:01:22.420000 --> 0:01:26.760000 on the various different routing protocols themselves, how you configure 0:01:26.760000 --> 0:01:29.100000 them, how you troubleshoot them. 0:01:29.100000 --> 0:01:32.640000 We've already got a whole series of videos for that in our existing CCNA 0:01:32.640000 --> 0:01:36.840000 video library. So this is like a prelude to that about why do we need 0:01:36.840000 --> 0:01:40.960000 those things? What do they do for us in our networks? 0:01:40.960000 --> 0:01:44.920000 I also want you to understand how routers learn the information that's 0:01:44.920000 --> 0:01:48.080000 needed to route and where that information is stored. 0:01:48.080000 --> 0:01:51.820000 So in some of my previous videos on routing, I've talked about the routing 0:01:51.820000 --> 0:01:56.000000 protocols, I've talked about how you turn them on, how you configure them, 0:01:56.000000 --> 0:01:58.800000 how you troubleshoot them, but we didn't really spend a lot of time on 0:01:58.800000 --> 0:02:03.940000 the information that they learn, where is that information stored, where 0:02:03.940000 --> 0:02:08.920000 in a router or a multi-layer switch, does it actually store its route 0:02:08.920000 --> 0:02:13.240000 information so that when a packet comes in, it knows where to look for 0:02:13.240000 --> 0:02:14.300000 the lookup information. 0:02:14.300000 --> 0:02:16.680000 So we'll talk a little bit about that. 0:02:16.680000 --> 0:02:20.480000 And I'm going to compare and contrast different routing protocols from 0:02:20.480000 --> 0:02:22.700000 a high level perspective. 0:02:22.700000 --> 0:02:27.840000 So that being the case, this is the agenda for our course. 0:02:27.840000 --> 0:02:30.380000 I'm going to talk about why do we need routing? 0:02:30.380000 --> 0:02:32.120000 That's going to be our first section. 0:02:32.120000 --> 0:02:34.080000 What happens to a packet? 0:02:34.080000 --> 0:02:37.300000 So when a packet is routed, what actually happens to it? 0:02:37.300000 --> 0:02:41.440000 Are there any changes made to that packet and why are those changes made? 0:02:41.440000 --> 0:02:43.200000 We'll discuss that. 0:02:43.200000 --> 0:02:44.960000 Where are the routes stored? 0:02:44.960000 --> 0:02:48.600000 This is where we'll talk about things like process switching and CEPF 0:02:48.600000 --> 0:02:50.160000 and fast switching. 0:02:50.160000 --> 0:02:54.280000 Those are all related to answering this question of where are route stored. 0:02:54.280000 --> 0:02:59.180000 We'll also look at how are route selected. 0:02:59.180000 --> 0:03:05.080000 So in other words, when a router learns of a route, how is it used that 0:03:05.080000 --> 0:03:07.960000 route? In other words, what makes a route usable? 0:03:07.960000 --> 0:03:12.040000 Are there things that if they were missing would make that route unusable 0:03:12.040000 --> 0:03:13.400000 and we could not store it anywhere? 0:03:13.400000 --> 0:03:15.940000 So what are those things? 0:03:15.940000 --> 0:03:18.660000 And we'll also look at contrasting routing protocols. 0:03:18.660000 --> 0:03:24.000000 We'll talk about what is an IGP versus an EGP, some high level differences. 0:03:24.000000 --> 0:03:28.100000 We'll go into the overall high level characteristic differences between 0:03:28.100000 --> 0:03:34.480000 distance vector, link state, advanced distance vector, and path vector. 0:03:34.480000 --> 0:03:38.060000 And that's where we will finish our course for today. 0:03:38.060000 --> 0:03:42.820000 So there is some prerequisite knowledge even at the ICND1 level that I'm 0:03:42.820000 --> 0:03:46.040000 assuming the IP that you have going into this. 0:03:46.040000 --> 0:03:50.540000 So number one, I'm assuming that you have familiarity with the IP protocol 0:03:50.540000 --> 0:03:53.100000 and the IP packet headers. 0:03:53.100000 --> 0:03:56.900000 In other words, when I'm throwing around this term IP, IP, IP, you know 0:03:56.900000 --> 0:03:58.020000 what I'm talking about. 0:03:58.020000 --> 0:04:00.540000 You don't know what IP stands for. 0:04:00.540000 --> 0:04:04.520000 So I'm assuming you know what the internet protocol is and why we have 0:04:04.520000 --> 0:04:09.600000 it. And when I say visualize an IP packet header, now you might not be 0:04:09.600000 --> 0:04:13.060000 able to visualize every single field in the IP packet header, but you 0:04:13.060000 --> 0:04:15.380000 can sort of visualize most of it. 0:04:15.380000 --> 0:04:18.560000 Most of the relevant stuff as far as routing is concerned. 0:04:18.560000 --> 0:04:22.720000 I'm also assuming that you have familiarity with some basic networking 0:04:22.720000 --> 0:04:25.240000 terms such as broadcast domain. 0:04:25.240000 --> 0:04:27.040000 I'm going to use that term a lot. 0:04:27.040000 --> 0:04:30.540000 Ethernet frame, memory, and CPU. 0:04:30.540000 --> 0:04:33.640000 So if you don't have familiarity with those four terms, if those four 0:04:33.640000 --> 0:04:36.980000 terms were foreign to you, you don't know what I'm talking about, broadcast 0:04:36.980000 --> 0:04:41.940000 domain, Ethernet frame, memory, and pausing this video right now and just 0:04:41.940000 --> 0:04:46.640000 taking 15 or 20 minutes to look them up and research them. 0:04:46.640000 --> 0:04:51.980000 So Q&A, this class is being held live and I'm recording it for the benefit 0:04:51.980000 --> 0:04:55.260000 of you guys, the people who are watching it in the future. 0:04:55.260000 --> 0:04:58.000000 So the live audience will have a chance to ask me questions. 0:04:58.000000 --> 0:05:01.560000 Now if you're watching this after it's been recorded and there's still 0:05:01.560000 --> 0:05:04.700000 some doubt in your mind, you still have some questions about some of the 0:05:04.700000 --> 0:05:07.840000 things I cover. There's a variety of ways for you to get those questions 0:05:07.840000 --> 0:05:12.560000 answered. The first way, the way I would prefer that you get those questions 0:05:12.560000 --> 0:05:18.280000 answered is by going to INE's online community and posting your question 0:05:18.280000 --> 0:05:22.220000 there so that other people have the opportunity to see your question and 0:05:22.220000 --> 0:05:24.780000 they have an opportunity to learn from the answer. 0:05:24.780000 --> 0:05:28.400000 So in the event that you've never been to INE's online community before, 0:05:28.400000 --> 0:05:33.620000 you would just log in to your members dashboard and then from here in 0:05:33.620000 --> 0:05:37.700000 the upper right corner where it says connect, click on that and the very 0:05:37.700000 --> 0:05:39.700000 first link is the IEOC. 0:05:39.700000 --> 0:05:42.800000 It stands for INE's online community. 0:05:42.800000 --> 0:05:47.620000 Click on the IEOC and here it says CCIE forums. 0:05:47.620000 --> 0:05:50.600000 Don't worry about the fact that it says CCIE because it actually has a 0:05:50.600000 --> 0:05:53.000000 lot more forums than just CCIE. 0:05:53.000000 --> 0:05:58.160000 So go ahead and click on that, CCIE forums and this, any questions that 0:05:58.160000 --> 0:06:02.780000 you have pertaining to this particular video series will go under CCNA. 0:06:02.780000 --> 0:06:06.520000 So that's about three quarters of the way down and you'll see right here 0:06:06.520000 --> 0:06:10.940000 under CCNA and CCMP forums, there is a CCNA forum. 0:06:10.940000 --> 0:06:16.180000 You can click on that and then from here you can just post your question 0:06:16.180000 --> 0:06:19.840000 and typically in just an hour or two you'll get an answer. 0:06:19.840000 --> 0:06:23.480000 There are hundreds of people that are signed up on this thing and so this 0:06:23.480000 --> 0:06:26.540000 is a great way so that other people can learn from the question that you 0:06:26.540000 --> 0:06:30.620000 posted as well as the reply that other people sent back. 0:06:30.620000 --> 0:06:33.780000 Now let's say theoretically and I'll tell you this does not happen very 0:06:33.780000 --> 0:06:37.580000 often but let's say theoretically that you post a question and nobody 0:06:37.580000 --> 0:06:43.240000 responds back. Well in that unlikely event you can send your question 0:06:43.240000 --> 0:06:46.860000 directly to me and you can see here you can send it to me, my email address 0:06:46.860000 --> 0:06:52.720000 is kbogart at INE.com or you can also follow me on Twitter where I post 0:06:52.720000 --> 0:06:56.500000 information about upcoming classes and boot camps and just sort of what's 0:06:56.500000 --> 0:07:00.060000 going on here at INE or you can follow me also on LinkedIn to get that 0:07:00.060000 --> 0:07:01.480000 information as well. 0:07:01.480000 --> 0:07:06.180000 So there's a variety of ways you can use to get your answers to your questions. 0:07:06.180000 --> 0:07:09.720000 So that concludes this introduction so let's go into the next video on 0:07:09.720000 --> 0:07:11.680000 why do we need routing.