WEBVTT 00:00:01.240 --> 00:00:03.520 Welcome to my introduction to networking 00:00:03.520 --> 00:00:06.359 course, typically abbreviated 00:00:06.359 --> 00:00:13.519 ITN. This will be for the CCNA version 7 00:00:14.719 --> 00:00:18.119 curriculum module 10 is about basic 00:00:18.119 --> 00:00:19.920 router 00:00:19.920 --> 00:00:22.960 configuration. So in this module, we're 00:00:22.960 --> 00:00:25.480 looking at how to configure basic router 00:00:25.480 --> 00:00:27.920 settings looking at the interfaces and 00:00:27.920 --> 00:00:29.640 setting up the default gateways on 00:00:29.640 --> 00:00:31.920 device. 00:00:31.920 --> 00:00:33.800 So let's jump right on in configuring 00:00:33.800 --> 00:00:36.760 the initial router settings, just like a 00:00:36.760 --> 00:00:40.160 switch we uh jump in. We configure a host 00:00:40.160 --> 00:00:43.239 name from the global configuration, 00:00:43.239 --> 00:00:46.079 you'll notice that will be the device 00:00:46.079 --> 00:00:49.399 name and we'll have config in 00:00:49.399 --> 00:00:53.359 Brackets. From there, we will be typing in 00:00:53.359 --> 00:00:55.320 host name space whatever the name, you 00:00:55.320 --> 00:00:59.320 want it to be if we want to enable a 00:00:59.320 --> 00:01:00.840 password. 00:01:00.840 --> 00:01:03.879 This is what secures the privileged EXA 00:01:03.879 --> 00:01:08.320 mode that is created by the enable 00:01:08.320 --> 00:01:11.320 section what you would do is enable 00:01:11.320 --> 00:01:13.680 secret and then put whatever password 00:01:13.680 --> 00:01:14.759 you 00:01:14.759 --> 00:01:18.400 want. If we want to secure the user exact 00:01:18.400 --> 00:01:21.960 mode, when we console in or if we're 00:01:21.960 --> 00:01:23.640 using a virtual 00:01:23.640 --> 00:01:26.680 terminal. We would then set up either a 00:01:26.680 --> 00:01:30.680 line console zero or a line vty 00:01:30.680 --> 00:01:33.479 BTY are the virtual 00:01:33.479 --> 00:01:35.600 Terminals and from there, you'd be 00:01:35.600 --> 00:01:38.759 setting a password using the password 00:01:38.759 --> 00:01:41.040 space whatever the password. You want it 00:01:41.040 --> 00:01:44.079 to be and then you also want to say when 00:01:44.079 --> 00:01:47.360 do you want it to prompt the user and we 00:01:47.360 --> 00:01:50.439 want the users to be prompted at login. 00:01:50.439 --> 00:01:53.040 So the second line would be 00:01:53.040 --> 00:01:58.360 login with a line vty, you can 00:01:58.360 --> 00:02:01.479 also have uh specific 00:02:01.479 --> 00:02:04.240 inputs that are required. You could do a 00:02:04.240 --> 00:02:08.800 secure shell SSH or you can allow tet or 00:02:08.800 --> 00:02:11.840 both keep in mind tnet everything is 00:02:11.840 --> 00:02:15.360 still plain text. SSH everything is 00:02:15.360 --> 00:02:19.519 encrypted but additional setup is needed. 00:02:19.519 --> 00:02:22.200 When we're doing 00:02:22.200 --> 00:02:26.800 SSH with the enable and the password, you 00:02:26.800 --> 00:02:30.120 can actually set an enable password 00:02:30.120 --> 00:02:33.200 without using secret. However secret 00:02:33.200 --> 00:02:36.280 actually hashes the password, you'll 00:02:36.280 --> 00:02:38.360 notice with the line connection line 00:02:38.360 --> 00:02:41.480 console and line vty both the passwords 00:02:41.480 --> 00:02:44.920 are using just a plain text password. We 00:02:44.920 --> 00:02:49.360 can encrypt the password by enabling the 00:02:49.360 --> 00:02:52.360 service for password encryption to do 00:02:52.360 --> 00:02:56.120 that we type service password encryption 00:02:56.120 --> 00:03:00.519 that will encrypt our passwords. 00:03:00.519 --> 00:03:04.760 Lastly, we need to set a banner. A banner 00:03:04.760 --> 00:03:07.360 is going to be a message that will be 00:03:07.360 --> 00:03:10.720 displayed when the user logs in. You do 00:03:10.720 --> 00:03:14.760 that by typing Banner motd, that is short 00:03:14.760 --> 00:03:19.440 form message of the day a special 00:03:19.440 --> 00:03:22.480 character write the message and you have 00:03:22.480 --> 00:03:26.440 to end with the same special character. 00:03:26.440 --> 00:03:30.480 You cannot use different starting and 00:03:30.480 --> 00:03:32.760 different special characters. They have 00:03:32.760 --> 00:03:34.159 to be the 00:03:34.159 --> 00:03:36.920 same. So how does that look in 00:03:36.920 --> 00:03:40.599 practice here? We have a host name R1 we 00:03:40.599 --> 00:03:44.640 have a a password of class for our line 00:03:44.640 --> 00:03:46.879 password. We have a password of 00:03:46.879 --> 00:03:49.560 Cisco. Those will all be plain text, 00:03:49.560 --> 00:03:52.239 except for the enable password until we 00:03:52.239 --> 00:03:55.640 turn on the services that encrypt our 00:03:55.640 --> 00:03:58.599 passwords. And then lastly, we have our 00:03:58.599 --> 00:04:01.720 Banner message 00:04:02.760 --> 00:04:05.519 and to make sure we understand this, we 00:04:05.519 --> 00:04:10.000 have a packet tracer lab. Moving on, how 00:04:10.000 --> 00:04:12.959 do we configure the interfaces routers 00:04:12.959 --> 00:04:16.160 and switches have multiple interfaces? So 00:04:16.160 --> 00:04:19.120 first of all, we need to know what they 00:04:19.120 --> 00:04:23.040 are you could do a show IP interface 00:04:23.040 --> 00:04:26.280 brief and that will show us the 00:04:26.280 --> 00:04:28.919 interfaces that has to be done at the 00:04:28.919 --> 00:04:33.199 privilege exec mode, just the pound sign 00:04:33.199 --> 00:04:36.360 show IP interface brief will give you 00:04:36.360 --> 00:04:37.479 all of the 00:04:37.479 --> 00:04:39.479 interfaces. Once you know how many 00:04:39.479 --> 00:04:42.160 interfaces you have, you can configure 00:04:42.160 --> 00:04:44.479 those interfaces you configure the 00:04:44.479 --> 00:04:46.360 interface by doing 00:04:46.360 --> 00:04:49.840 interface the type and number of the 00:04:49.840 --> 00:04:52.440 interface. You can list a description if 00:04:52.440 --> 00:04:55.320 you'd like. You have the ability to give 00:04:55.320 --> 00:04:59.919 it an ipv4 and or an IPv6 address and 00:04:59.919 --> 00:05:01.759 you should turn on the interface with a 00:05:01.759 --> 00:05:05.520 no shutdown. A shutdown command turns off 00:05:05.520 --> 00:05:10.440 the interface. No shutdown activates the 00:05:10.440 --> 00:05:14.039 interface. So in real practice if we are 00:05:14.039 --> 00:05:17.319 programming the gig z0000 00:05:17.319 --> 00:05:20.440 interface that would be the gigabit 00:05:20.440 --> 00:05:23.319 interface on the Lan 00:05:23.319 --> 00:05:25.880 side. That is how we would do it. We would 00:05:25.880 --> 00:05:27.720 give the IP 00:05:27.720 --> 00:05:30.120 address. We should give a description so 00:05:30.120 --> 00:05:31.600 we know what it 00:05:31.600 --> 00:05:34.800 is and we should turn it on. In this 00:05:34.800 --> 00:05:39.360 example, we're also enabling an IPv6 00:05:39.479 --> 00:05:42.800 address if we wanted to configure, the 00:05:42.800 --> 00:05:46.240 gigabit 001 interface. We could do that 00:05:46.240 --> 00:05:49.479 as well that is the link between R1 and 00:05:49.479 --> 00:05:52.600 R2. Hence the description, we give it an 00:05:52.600 --> 00:05:55.639 IP address. We give an IPv6 address and 00:05:55.639 --> 00:06:00.360 we also say no shutdown to turn it on. 00:06:00.360 --> 00:06:02.560 So how do we verify these interfaces are 00:06:02.560 --> 00:06:06.280 up and running show IP interface 00:06:06.280 --> 00:06:12.120 brief as long as the okay is yes, and the 00:06:12.120 --> 00:06:17.039 status is yes or up. We are good if the 00:06:17.039 --> 00:06:20.479 status is set to administratively down 00:06:20.479 --> 00:06:24.240 that means that we didn't issue. The no 00:06:24.240 --> 00:06:28.960 shutdown command if the protocol is down, 00:06:28.960 --> 00:06:31.400 but the status is not administratively 00:06:31.400 --> 00:06:35.120 down. It is typically a layer one issue, a 00:06:35.120 --> 00:06:37.479 physical networking 00:06:37.479 --> 00:06:40.280 issue. If you want to look at the IPv6 00:06:40.280 --> 00:06:43.199 version. You would do a show IPv6 00:06:43.199 --> 00:06:45.360 interface brief, and that will give you 00:06:45.360 --> 00:06:49.120 the IPv6 equivalent of the interface 00:06:49.120 --> 00:06:50.759 brief 00:06:50.759 --> 00:06:54.160 communication, all right. So how do we 00:06:54.160 --> 00:06:57.199 look at certain commands show commands. 00:06:57.199 --> 00:06:58.960 Specifically, if we're looking at 00:06:58.960 --> 00:07:00.199 interfaces, 00:07:00.199 --> 00:07:02.280 show IP interface brief is going to be 00:07:02.280 --> 00:07:05.120 the most common. If we're looking at 00:07:05.120 --> 00:07:07.240 routing information, it'll be show IP 00:07:07.240 --> 00:07:09.560 route, we could look at detailed 00:07:09.560 --> 00:07:11.800 information by looking at show 00:07:11.800 --> 00:07:14.400 interfaces or show IP 00:07:14.400 --> 00:07:16.879 interfaces. Those will give us very 00:07:16.879 --> 00:07:20.440 specific statistics on those 00:07:20.440 --> 00:07:23.560 interfaces. All of these have a IPv6 00:07:23.560 --> 00:07:27.240 equivalent command as 00:07:27.240 --> 00:07:30.560 well. So going back, here's how we would 00:07:30.560 --> 00:07:34.160 do our show IP interface brief. Again, it 00:07:34.160 --> 00:07:37.000 is important to realize these are our 00:07:37.000 --> 00:07:40.520 basic, show commands for our verification 00:07:40.520 --> 00:07:44.159 for interfaces. If we are doing a route, 00:07:44.159 --> 00:07:46.159 if we're looking for routing information, 00:07:46.159 --> 00:07:49.039 show IP route we will actually show 00:07:49.039 --> 00:07:51.240 better breakdowns of these tables in a 00:07:51.240 --> 00:07:52.960 later 00:07:52.960 --> 00:07:56.280 lecture, but this is how a routing table 00:07:56.280 --> 00:07:59.720 looks. This is what the router will use 00:07:59.720 --> 00:08:02.919 to make the routing decisions. It will 00:08:02.919 --> 00:08:05.479 use this table to figure out how to 00:08:05.479 --> 00:08:09.000 forward packets 00:08:09.159 --> 00:08:12.879 appropriately show interfaces. You can 00:08:12.879 --> 00:08:15.319 show all interfaces or you can be 00:08:15.319 --> 00:08:18.319 specific on one interface, this will give 00:08:18.319 --> 00:08:20.400 you a detailed breakdown of that 00:08:20.400 --> 00:08:23.240 interface the MAC address the IP address. 00:08:23.240 --> 00:08:26.840 The MTU, the reliability, the transmit and 00:08:26.840 --> 00:08:31.199 receive load. If there is ARP information, 00:08:31.199 --> 00:08:34.120 if there's anything being queried. If 00:08:34.120 --> 00:08:35.880 there's anything being overloaded, this 00:08:35.880 --> 00:08:39.080 is what's going to tell 00:08:39.719 --> 00:08:44.920 you show IP interface will also give you 00:08:44.920 --> 00:08:47.760 the uh interface. If it's up, if the blind 00:08:47.760 --> 00:08:50.640 protocol is up, this will give you more 00:08:50.640 --> 00:08:53.839 detailed on specific functionality. 00:08:53.839 --> 00:08:55.640 Notice this does not give you 00:08:55.640 --> 00:08:58.240 reliability or transmit and receive 00:08:58.240 --> 00:09:00.320 loads. 00:09:00.320 --> 00:09:03.040 So show interface will give you transmit 00:09:03.040 --> 00:09:06.480 and receive loads, show IP interface will 00:09:06.480 --> 00:09:12.680 give you specific on protocol 00:09:12.720 --> 00:09:14.839 functionality again. There's IP 00:09:14.839 --> 00:09:18.959 equivalent for IPv6 show IPv6 interface, 00:09:18.959 --> 00:09:22.000 we show you if it's up, if it's down and 00:09:22.000 --> 00:09:24.160 if there's any multicast groups 00:09:24.160 --> 00:09:26.320 associated with it. And then the rest 00:09:26.320 --> 00:09:29.640 will be protocols. 00:09:29.640 --> 00:09:33.920 Moving on, how do we configure an 00:09:34.200 --> 00:09:38.000 ipv for default 00:09:38.000 --> 00:09:40.560 gateway. Remember the default gateway is 00:09:40.560 --> 00:09:44.760 the exit out of our 00:09:44.760 --> 00:09:47.800 landan. So here we have two interfaces on 00:09:47.800 --> 00:09:51.279 the router gig 000000 and gig 00:09:51.279 --> 00:09:54.720 001, if we actually want two different 00:09:54.720 --> 00:09:57.480 networks. We could do that one network on 00:09:57.480 --> 00:10:00.519 gig 0000 one network on gig 00:10:00.519 --> 00:10:03.360 001, and to communicate between these two 00:10:03.360 --> 00:10:05.240 networks, it has to go to a layer 3 00:10:05.240 --> 00:10:09.000 device. The layer 3 device is going to be 00:10:09.000 --> 00:10:11.800 our router and again the default gateway 00:10:11.800 --> 00:10:15.760 is our exit point for our Network. Again, 00:10:15.760 --> 00:10:18.760 it's going to be the 00:10:19.120 --> 00:10:23.040 router switches must have a default 00:10:23.040 --> 00:10:25.560 gateway. If they're going to be remotely 00:10:25.560 --> 00:10:29.760 managed at all, the switches should be 00:10:29.760 --> 00:10:34.120 able to pass frames to the router, 00:10:34.120 --> 00:10:36.680 assuming the in device is actually 00:10:36.680 --> 00:10:38.839 sending it to remote 00:10:38.839 --> 00:10:42.959 host. The switch should also have a 00:10:42.959 --> 00:10:46.040 default gateway, just in case the switch 00:10:46.040 --> 00:10:50.399 is not sure how to forward it 00:10:50.399 --> 00:10:54.040 on how do we configure an IP default 00:10:54.040 --> 00:10:57.320 gateway. On a switch from the global 00:10:57.320 --> 00:11:00.000 configuration, we issue a 00:11:00.000 --> 00:11:03.959 IP default gateway command and that is 00:11:03.959 --> 00:11:07.880 IP default gateway space. The IP address 00:11:07.880 --> 00:11:10.360 of the 00:11:14.560 --> 00:11:19.440 Gateway. For whatever reason, we have a 00:11:19.440 --> 00:11:22.920 bug in our PowerPoints. That list 00:11:22.920 --> 00:11:26.560 the graphic not being completed as of 00:11:26.560 --> 00:11:29.399 yet, 00:11:29.399 --> 00:11:33.440 we do have a packet tracer on looking at 00:11:33.440 --> 00:11:35.279 router information configuring the 00:11:35.279 --> 00:11:38.000 router and verifying the 00:11:38.000 --> 00:11:40.040 configuration. We also have another 00:11:40.040 --> 00:11:43.519 Packet Tracer at looking at verifying 00:11:43.519 --> 00:11:45.360 Network documentation, implementing 00:11:45.360 --> 00:11:47.839 Solutions and testing and verifying 00:11:47.839 --> 00:11:50.320 certain problems, looking at the default 00:11:50.320 --> 00:11:54.480 gateway. And that is it for this 00:11:54.480 --> 00:11:57.079 chapter. There are videos if you wish to 00:11:57.079 --> 00:12:00.800 view them in nead 00:12:01.079 --> 00:12:03.639 overall. We also do have another lab 00:12:03.639 --> 00:12:06.120 looking at basic device configuration, 00:12:06.120 --> 00:12:08.480 both a router and a 00:12:08.480 --> 00:12:11.880 switch. We also have a basic U lab 00:12:11.880 --> 00:12:14.399 setting up again switch and a router 00:12:14.399 --> 00:12:17.720 setting up basic uh device functionality 00:12:17.720 --> 00:12:20.680 host name Banner enable things of that 00:12:20.680 --> 00:12:23.199 nature all right. So summary, what did we 00:12:23.199 --> 00:12:25.720 learn we looked at how to navigate 00:12:25.720 --> 00:12:28.279 between user and exec mode and Global 00:12:28.279 --> 00:12:29.680 configuration mode? 00:12:29.680 --> 00:12:32.720 We looked at basic configuration how to 00:12:32.720 --> 00:12:35.360 set a host name how to set an enable 00:12:35.360 --> 00:12:37.959 password, how to set line passwords, how 00:12:37.959 --> 00:12:40.440 to set a banner we also looked at how to 00:12:40.440 --> 00:12:43.399 set interfaces basic configuration for 00:12:43.399 --> 00:12:46.160 interfaces, and how to turn them on again. 00:12:46.160 --> 00:12:49.160 We turn them on with a no shutdown 00:12:49.160 --> 00:12:52.880 command. We also looked at how to set a 00:12:52.880 --> 00:12:54.800 default gateway and the purpose of a 00:12:54.800 --> 00:12:57.639 default gateway. Any questions or 00:12:57.639 --> 00:13:02.880 concerns, please reach out. Thank you.