WEBVTT 00:09.460 --> 00:11.120 Hello Friends will come back. 00:11.120 --> 00:14.300 Welcome to the final lesson of this lecture. 00:14.570 --> 00:21.230 In this lesson we're going to talk about how to troubleshoot the network problems in our previous lessons 00:21.290 --> 00:29.420 we learn some of the commands to troubleshoot the network problems like if down if or we learn how to 00:29.420 --> 00:32.150 configure and even if conflict come on. 00:32.150 --> 00:38.880 OK so here in this lesson I'm going to show you some important commands for troubleshooting the next 00:38.910 --> 00:39.470 problem. 00:39.480 --> 00:40.170 OK. 00:40.490 --> 00:45.000 OK we saw in some of the previous lessons the use of ping. 00:45.150 --> 00:45.520 OK. 00:45.530 --> 00:49.330 In this lesson I want to show you some of the details of the ping. 00:49.340 --> 00:49.980 Come on. 00:50.150 --> 00:50.570 OK. 00:50.720 --> 00:52.160 So let's get practical. 00:52.190 --> 00:54.220 How could this be. 00:54.230 --> 00:58.970 Is a command which is in use to test the connectivity in between two computers. 00:58.970 --> 00:59.480 OK. 00:59.720 --> 01:02.670 So there is a format like this. 01:02.720 --> 01:07.420 You can either determine like this or an IP address like this. 01:07.460 --> 01:07.680 OK. 01:07.700 --> 01:13.010 But you can't being bought at once so just hit enter here. 01:13.070 --> 01:17.100 We saw this kind of output in the previous lesson. 01:17.180 --> 01:24.680 So when we ping Google dot com It gives the output like this the number of bytes of data is transmitted 01:25.070 --> 01:30.930 to the destination or that Google dot com to get the reply or can we get this reply. 01:30.950 --> 01:36.390 So that kind of reply means that we have successfully connected to Google dot com. 01:36.500 --> 01:43.670 OK so at the statistics here you can see 15 packet transmitted received and zero percent packet loss. 01:43.780 --> 01:45.910 OK the time required for this operation. 01:45.920 --> 01:48.620 You get the statistics like this. 01:48.860 --> 01:49.470 OK. 01:49.940 --> 01:57.050 So when you in the IP domain it continues looping until you press control-C. 01:57.210 --> 02:02.910 OK but there is a switch I fancy with it you can control this output. 02:03.010 --> 02:03.530 OK. 02:03.800 --> 02:07.480 So I want to see not only file types. 02:07.490 --> 02:13.730 So here I can see it like this thing I fancy for you and Google got. 02:13.920 --> 02:16.500 Let's see OK. 02:16.550 --> 02:21.660 Now here you can see it's going to print all the file you bring output. 02:21.730 --> 02:22.170 OK. 02:22.340 --> 02:23.230 Like this. 02:23.270 --> 02:26.880 OK you can sit dippie got put like this. 02:27.170 --> 02:27.610 OK. 02:27.760 --> 02:28.730 No no. 02:28.970 --> 02:30.760 There is an option. 02:30.770 --> 02:34.070 We can see it and that option is called This time interval. 02:34.220 --> 02:34.860 OK. 02:34.910 --> 02:39.230 So with small hyphen I you can see it in time interval. 02:39.230 --> 02:43.190 So I want to say see the output of this pin. 02:43.380 --> 02:49.070 After five milliseconds it means that I want to set the time interval between groupings. 02:49.150 --> 02:49.770 OK. 02:50.060 --> 02:55.270 So here you can set like this and hit enter OK. 02:55.430 --> 02:59.890 So now let's see this is our first being then second. 03:03.810 --> 03:04.410 And third 03:08.640 --> 03:11.130 full. 03:11.240 --> 03:11.540 OK. 03:11.560 --> 03:13.450 Is going to print it out. 03:13.570 --> 03:16.330 With that difference of few milliseconds. 03:16.480 --> 03:17.380 OK. 03:17.980 --> 03:22.840 In this way you can set there time in trouble with hyphen I. 03:23.210 --> 03:23.520 OK. 03:23.530 --> 03:27.980 There is another option called as a flopping. 03:28.180 --> 03:33.540 So your concern sort of brings to the destination IP address of a hyphen. 03:33.850 --> 03:38.540 So by pressing this what you need to certain time control also. 03:38.560 --> 03:40.130 So let's see what happens here. 03:42.140 --> 03:49.840 It is not showing any output here very fast because now it is in sending flowers ping to the Google 03:49.840 --> 03:50.570 dot. 03:50.860 --> 03:51.370 OK. 03:52.920 --> 04:01.680 So now press control see OK now or you can see here we cannot get any ping or put But here had the bottom 04:01.680 --> 04:04.780 Stanisic you can see Sixpack it transmitted. 04:04.850 --> 04:06.280 It's expected to. 04:06.430 --> 04:07.350 Oh good. 04:07.500 --> 04:12.570 That means it's been pings to the destination we Typhon. 04:12.750 --> 04:13.300 OK. 04:13.500 --> 04:21.830 If you have multiple network cards or multiple interfaces on your system then you can specify it hyphen 04:21.870 --> 04:22.410 I. 04:22.740 --> 04:27.480 And then the interface name so like this zero. 04:27.750 --> 04:39.150 And you can bring to the IP address or how this IP address configured invalid argument OK the hiring 04:39.420 --> 04:43.480 and B zero us 3. 04:43.940 --> 04:50.580 It takes a long time because we will see how one interface and we specify the hyphen. 04:50.630 --> 04:52.740 So I'm going to click here. 04:53.200 --> 04:53.470 OK. 04:53.580 --> 05:01.020 When you send the pink to mine by default it sends 64 by of packets. 05:01.040 --> 05:01.350 OK. 05:01.370 --> 05:07.150 So you can set up both sides of packets to be transmitted to the destination IP. 05:07.150 --> 05:08.710 So hyphen S.. 05:08.780 --> 05:14.100 So here I want to set it to suppose hundred of bytes. 05:14.120 --> 05:14.520 OK. 05:14.570 --> 05:17.240 You'd send the packets in bytes. 05:17.550 --> 05:21.440 OK so just be the whole world with 100 bytes 05:25.400 --> 05:26.400 hogi. 05:26.480 --> 05:34.900 When you say 600 100 bytes OK add the left column here and see 32 bytes from this network. 05:35.190 --> 05:35.600 OK. 05:35.690 --> 05:39.450 You can set the size for the pin. 05:39.530 --> 05:40.170 OK. 05:40.580 --> 05:40.830 OK. 05:40.830 --> 05:47.930 Now after performing all the ping operations for your configure IP if you get your PIN you successful 05:48.110 --> 05:55.240 and you still you you are not able to access the connection or the PC. 05:55.340 --> 05:58.280 Then there is a problem with the McAleer. 05:58.430 --> 05:58.880 OK. 05:59.180 --> 06:02.390 So how to deal with McAleer days. 06:02.400 --> 06:04.420 C'mon ERP. 06:04.520 --> 06:13.470 So with ERP you'll get this configuration like this. 06:13.490 --> 06:17.760 OK so it brings the gateway address. 06:17.870 --> 06:23.730 OK the hardware address then the address of the destination machines. 06:23.730 --> 06:32.020 So under 0 9 is a virtual host Tony adapter that we configured on the Windows machine. 06:32.130 --> 06:41.280 So with this you can see the configure the options and you can determine the machine or the IP that 06:41.310 --> 06:44.920 you are trying to pin is present in this list or not. 06:45.000 --> 06:51.050 If it is not present here that means you need to configure it inside this ERP. 06:51.220 --> 06:51.820 OK. 06:52.050 --> 06:57.870 So there is a switch with the help of which you can add an IP address into this list. 06:57.870 --> 07:08.790 OK so what I want to know the robot are you got 16 not 16 to do here. 07:09.220 --> 07:29.300 And I want to set the MAC address to suppose 0 0 0 6 0 0 the capital zero you see B C and 9 C. 07:29.840 --> 07:30.350 OK. 07:30.420 --> 07:34.510 And he had an operation not permitted. 07:34.690 --> 07:36.110 Let's look at pseudo 07:39.350 --> 07:47.640 when he can now view the hive and free OK. 07:47.640 --> 07:51.910 Now here at the beginning you can see 10.0 or 2.20 booth. 07:51.970 --> 07:54.380 It's been added to this list. 07:54.430 --> 07:54.920 OK. 07:55.060 --> 08:03.600 And if you want to delete the entry What do you need to do is you need to provide the switch in the 08:03.880 --> 08:08.080 IP address remove this MAC address from here. 08:09.180 --> 08:12.000 OK now let's do here. 08:12.690 --> 08:19.030 When we look at the IP is still present there. 08:19.340 --> 08:26.090 OK let's try to think it's not authentic to its destination host unreachable. 08:26.090 --> 08:33.410 That means our IP is removed successfully but you need to restart this interface to see the changes 08:33.470 --> 08:35.060 into this error list. 08:35.230 --> 08:35.730 OK. 08:35.870 --> 08:43.590 In this way you can determine or troubleshoot the problem on McAleer if the problem is present on McAleer 08:43.610 --> 08:46.610 with the help of this come on you can solve that. 08:46.850 --> 08:47.850 OK. 08:48.430 --> 08:48.810 OK. 08:48.890 --> 08:55.730 After performing all these operation if you still have a problem with your neck then you can test for 08:55.760 --> 08:58.290 the gateways or the routers. 08:58.430 --> 08:58.860 OK. 08:59.000 --> 09:01.830 So there is a common corridor as Chris Rock. 09:01.850 --> 09:08.690 So first of all you need to install sudo install. 09:09.550 --> 09:12.190 Here is the key trace route. 09:12.260 --> 09:12.650 OK. 09:12.740 --> 09:15.050 I have already installed it on this machine. 09:15.380 --> 09:24.710 So what Chris Rock does is it use the address it gives the address of the gateways in between the source 09:24.710 --> 09:26.700 and the destination machine. 09:26.810 --> 09:34.700 So an internet is a group of four giant networks so you reach from source to destination and the packet 09:34.850 --> 09:38.340 needs to growl along different gateways. 09:38.510 --> 09:45.500 So if there is a problem present in any kind of data way so you can determine it with the traceroute. 09:45.500 --> 09:46.120 Come on. 09:46.280 --> 09:51.320 So you use traceroute to type this route. 09:51.650 --> 09:59.820 And then the IP like this Google dot com you can type an IP address like this. 09:59.830 --> 10:02.310 You got 16 on it. 10:02.600 --> 10:04.940 OK now I want to google. 10:05.190 --> 10:06.030 Let's get into 10:12.640 --> 10:13.180 OK now. 10:13.250 --> 10:18.830 Here in the output you can see at the beginning it shows the gateway of this local machine. 10:18.850 --> 10:25.330 And at the end it shows they'll get rid of this local machine and in between these two it slows and 10:25.330 --> 10:27.190 the output video starts. 10:27.250 --> 10:38.080 The stars represent that either the Gateway has blocked with the rope come on or there is a problem 10:38.590 --> 10:40.270 with this gateways. 10:40.330 --> 10:40.870 OK. 10:41.050 --> 10:49.300 The gateways which come across this source and destination machines to so by observing this you can 10:49.360 --> 10:52.790 easily do to mine where the problem exists. 10:52.900 --> 10:53.400 OK. 10:53.680 --> 10:57.280 So suppose I'm going to here for this. 10:57.460 --> 11:04.230 No there are got 16 okayed it shows a very small output here. 11:04.490 --> 11:04.680 OK. 11:04.790 --> 11:09.740 Because it is just a single machine and it is a wonderful machine. 11:09.740 --> 11:12.670 So that's why we get such kind of output. 11:12.930 --> 11:21.180 OK the Chris would come on by default prints the destination of the UDP protocol. 11:21.190 --> 11:29.690 But you can set it to ICMP protocol by writing the switch like Ifan I and I should be capital. 11:29.890 --> 11:38.590 So I'm trying to google with capital by it saying operation not put McKidd pseudo 11:42.310 --> 11:44.810 OK now of providing capital. 11:45.010 --> 11:51.590 I didn't here are different IPs that we can get with the previous output. 11:51.750 --> 11:52.510 OK. 11:52.870 --> 11:59.760 A cross between the source and the destination. 11:59.830 --> 12:06.080 This way you can get this kind of information which will be very helpful for you to solve the problem 12:06.200 --> 12:08.340 if it is about the gateways. 12:08.690 --> 12:14.760 You can not Cresap when his domain or IP by providing a different port. 12:14.780 --> 12:17.660 So you press route with a particular port. 12:17.660 --> 12:21.330 You need to type in the B and the port number. 12:21.560 --> 12:31.460 I want to Chris Rupi for number 30 and the domain is Google all this way with Ubuntu called 12:37.560 --> 12:38.020 ok. 12:38.060 --> 12:44.610 It's take a long way to reach want to dot com from this local machine. 12:44.630 --> 12:50.430 OK you can see there are 30 gateways in between that need to pass. 12:50.690 --> 12:53.440 But we have here and different poor. 12:53.740 --> 12:54.310 OK. 12:54.500 --> 12:57.670 So that that's why we get this kind of output. 12:58.010 --> 13:03.030 So in this way you can troubleshoot any machine with the help of these commands. 13:03.050 --> 13:03.720 OK. 13:04.250 --> 13:08.050 This is not about networking like CCMA or that. 13:08.270 --> 13:14.990 But if you know the basics of computer networking are you how if you already completed the basics of 13:14.990 --> 13:19.760 CCN then you'll understand how this works OK very easily. 13:19.760 --> 13:27.110 So if you don't have any knowledge of CC and the like thing you can search on YouTube and get very cool 13:27.440 --> 13:31.300 YouTube tutorials for it to understand the basics of it. 13:31.310 --> 13:37.750 And then after that you'll understand the depth of these glorious Aki.