1 00:00:00,515 --> 00:00:06,990 In the previous video, we already configure an ip address in router1 and router2. 2 00:00:07,403 --> 00:00:12,133 Next in this video, we are going to talk about routing. 3 00:00:12,790 --> 00:00:22,812 I have a question, is pc 1 able to communicate with pc 2? Let’s try it, check the ip address first, 4 00:00:23,372 --> 00:00:36,464 pc 2 is correct, pc 1 is also correct. Now let’s ping from pc 1 to pc 2, ping 192.168.2.10, 5 00:00:37,300 --> 00:00:42,051 okay here we can see the result is destination host unreachable, 6 00:00:42,492 --> 00:00:45,188 this is means that the ping is failed. 7 00:00:45,932 --> 00:00:56,437 Now let’s see why this is failed. When pc 1 ping to pc 2, the source is 192.168.1.10, 8 00:00:57,022 --> 00:01:10,103 and the destination is 192.168.2.10, pc 1 will ask router 1, "hey router 1, do you know where is 192.168.2.10?" 9 00:01:10,680 --> 00:01:16,122 When router 1 receive the question, router 1 will check the routing table, 10 00:01:16,454 --> 00:01:27,905 let’s check it, do show ip route, here we can see that router 1 don’t know about 192.168.2.10 11 00:01:28,826 --> 00:01:41,706 Router 1 only have an information about 10.10.10.0/24 and 192.168.1.0/24. This two network 12 00:01:41,706 --> 00:01:50,417 is automatically added to routing table with label c, because this 2 network is connected to router 1. 13 00:01:51,212 --> 00:02:04,808 10.10.10.0/24 is connected in fa0/1, and 192.168.1.0/24 is connected in fa0/0. 14 00:02:06,163 --> 00:02:09,048 Let’s write the routing table in router 1, 15 00:02:15,300 --> 00:02:26,188 Okay, this is why pc 1 can not ping to pc 2, because router 1 don’t know where is 192.168.2.10. 16 00:02:26,892 --> 00:02:31,820 This is also same if we try to ping from pc 2 to pc 1, 17 00:02:34,140 --> 00:02:42,117 the source is 192.168.2.10 and the destination is 192.168.1.10, 18 00:02:42,854 --> 00:02:50,920 so pc 2 will ask router 2, "hey router 2 do you know where is 192.168.1.10?" 19 00:02:51,546 --> 00:02:56,437 Router 2 don’t know about 192.168.1.10, 20 00:02:57,217 --> 00:03:05,085 why? Because if we see here in the topology, router 2 will have 2 entry in the routing table, 21 00:03:05,486 --> 00:03:23,011 which is 10.10.10.0/24 connected to fa0/0, and 192.168.2.0/24 connected to fa0/1. 22 00:03:26,769 --> 00:03:34,261 Let’s check it, do show ip route, okay here we can see that we only have an information 23 00:03:34,261 --> 00:03:48,533 about 10.10.10.0/24 and 192.168.2.0/24, router 2 don’t know about 192.168.1.0/24 24 00:03:49,720 --> 00:03:56,911 So now we need to configure a routing so pc 1 will able to communicate with pc 2. 25 00:03:58,280 --> 00:04:02,120 In this case we will learn about static routing first. 26 00:04:02,729 --> 00:04:07,668 Later in the next video, we will also learn about dynamic routing. 27 00:04:08,783 --> 00:04:11,988 Okay, so let’s focus on static routing. 28 00:04:12,506 --> 00:04:18,086 With static routing, we will tell the router how to reach destination. 29 00:04:18,600 --> 00:04:29,494 For example we will tell router 1, if router 1 want to go to 192.168.2.10, router 1 should go to router 2. 30 00:04:30,200 --> 00:04:38,088 And router 2, if want to go to 192.168.1.10, router 2 should go to router 1. 31 00:04:38,723 --> 00:04:42,708 Let’s just start, we will configure router1 first. 32 00:04:43,569 --> 00:04:51,509 Ip route and then the destination network, in this case we want to tell router 1 how to reach 33 00:04:51,509 --> 00:05:05,891 192.168.2.0/24, so the destination network is 192.168.2.0 and the subnetmask is 255.255.255.0 34 00:05:06,660 --> 00:05:17,232 Next we need to define the next hop. If we see here, if router 1 want to go to 192.168.2.0/24, 35 00:05:17,452 --> 00:05:25,237 absolutely router 1 will go through router 2. So the next hop is the ip address of router 2, 36 00:05:25,326 --> 00:05:35,143 which is 10.10.10.2. so here let’s put the router 2 ip address, 10.10.10.2. 37 00:05:36,020 --> 00:05:42,943 In simple word, this command means that we tell router 1, if router 1 want to go to 38 00:05:42,943 --> 00:05:53,162 192.168.2.0/24, router 1 should go through 10.10.10.2, which is router 2. 39 00:05:58,440 --> 00:06:03,137 Let’s check the routing table again, do show ip route, 40 00:06:03,772 --> 00:06:14,225 here we can see that now we have route to 192.168.2.0/24 and the next hop is 10.10.10.2 41 00:06:14,746 --> 00:06:17,708 S here means static routing. 42 00:06:19,512 --> 00:06:25,088 Okay we have done in router 1, next, let’s configure on router 2. 43 00:06:27,132 --> 00:06:31,428 From router 2, we want to tell how to go to pc 1, 44 00:06:34,512 --> 00:06:45,114 so ip route the destination network is 192.168.1.0 and the subnetmask is 255.255.255.0, 45 00:06:45,932 --> 00:06:52,672 and then the gateway is the ip address of router 1, which is 10.10.10.1. 46 00:06:55,757 --> 00:07:03,511 Okay now let’s see the routing table, do show ip route, here we can see that now we have S, 47 00:07:03,600 --> 00:07:15,000 this is means static routing, the destination is 192.168.1.0/24 and the next hop is 10.10.10.1. 48 00:07:15,974 --> 00:07:22,574 Now pc 1 and pc 2 should be able to communicate each others. Let’s try. 49 00:07:25,212 --> 00:07:29,061 Okay here we can see that now the result is success. 50 00:07:30,000 --> 00:07:36,037 Okay I think enough for this video. I hope you understand about routing static. 51 00:07:36,614 --> 00:07:42,797 In the next video, we are going to add 1 more router, and then we will learn how to configure 52 00:07:42,797 --> 00:07:45,568 static routing in 3 router. 53 00:07:46,196 --> 00:07:49,764 Thankyou for watching and see you on the next video.