1 00:00:00,730 --> 00:00:09,440 So he has ensemble network we have Rato one with Kid race 10 1 1 1 on Fosset Ethan in 0 0 10 1 2 1 1 2 00:00:09,450 --> 00:00:16,830 cereal 1 slash 0 which is connected to our team or two is configured with 10 1:59 on Syria once left 3 00:00:16,850 --> 00:00:28,250 zero and 10 1 3 1 on cereal 1 slash 1 or 3 is configured with 10 1 3 2 1 0 1 6 0 and 10 1 4 1 1 4. 4 00:00:28,260 --> 00:00:36,480 Ethan It's 0 0 or 1 and all three are connected via another serial link and all configured with addresses 5 00:00:36,480 --> 00:00:42,170 10 1 5 1 or 1 and 10 1 5 2 or 3. 6 00:00:42,180 --> 00:00:49,910 Please note that the links feed the serial links have been set to 128 kilobits per second on Rotto 1 7 00:00:50,950 --> 00:00:58,450 so run into phase serial once next Zerah will allow us to see the configuration in C it's got an IP 8 00:00:58,450 --> 00:01:02,680 address and the bandwidth is being configured to 128 kilobits per second. 9 00:01:05,890 --> 00:01:14,470 The same information can be viewed on serial once one IP address with bandwidth show IP protocols will 10 00:01:14,470 --> 00:01:18,320 allow me to see that no routing protocols have been enabled on this router. 11 00:01:20,600 --> 00:01:29,660 So going to level configuration mode I can now enable OSPF by copying the command Rodda OSPF and specifying 12 00:01:29,660 --> 00:01:31,170 a process ID. 13 00:01:31,280 --> 00:01:37,520 Once again this process ID is local to the Rodda and does not have to be the same on all of the route 14 00:01:37,520 --> 00:01:45,560 as Zone Rotto one I'm going to specify one topping the command to show IP protocols will allow me to 15 00:01:45,560 --> 00:01:47,720 see which routing protocols enable. 16 00:01:47,930 --> 00:01:57,200 And as you can see OSPF is enabled with Prozess ID one and the router ID is set to 10 1 5 1. 17 00:01:57,500 --> 00:02:06,920 However popping the commands to show IP OSPF interfaces will allow me to see that OSPF is not enabled 18 00:02:06,950 --> 00:02:13,250 on any interfaces on the serrata OSPF will not fall neighbor relationships and will not exchange rates 19 00:02:14,300 --> 00:02:18,430 for Naboo relationships to be established and for ops to be advertised. 20 00:02:18,500 --> 00:02:23,490 You need to talk to them on network and then specify a network. 21 00:02:23,800 --> 00:02:29,350 So I could specify 10 doc one and one of one the IP address of the FOS. 22 00:02:29,370 --> 00:02:31,840 Ethan is 00 interface. 23 00:02:32,040 --> 00:02:35,260 And then I can specify a wild card mosque. 24 00:02:35,280 --> 00:02:42,980 This is an inverse mosque similar to an list with 0 in binary means match and one in binary means ignore. 25 00:02:43,170 --> 00:02:46,620 So this is an exact match on that IP address. 26 00:02:46,620 --> 00:02:49,550 OSPF will only be enabled on Phos. 27 00:02:49,560 --> 00:02:51,700 Ethan It's 0 0. 28 00:02:51,750 --> 00:02:53,820 You then need to specify an area. 29 00:02:54,950 --> 00:02:57,630 And in this case I'm going to specify area 0. 30 00:02:57,980 --> 00:03:08,390 The area can be specified as a decimal value in this range all inducted decimal IP address format. 31 00:03:08,450 --> 00:03:12,080 We're just going to specify the area as Area 0. 32 00:03:12,350 --> 00:03:21,010 Now topping the C'mon do show the OSPF interface allows me to see that OSPF is enabled on first. 33 00:03:21,020 --> 00:03:22,730 Ethan It's 0 0. 34 00:03:23,090 --> 00:03:30,140 The IP address on that interface is 10 1 1 1 slash 24 and the area that that interface is being put 35 00:03:30,140 --> 00:03:32,340 into its areas Zira. 36 00:03:32,810 --> 00:03:40,210 You can see once again that the process ID is one the router ID is 10 1 5 1 and the network type is 37 00:03:40,310 --> 00:03:50,010 broadcast because phos Ethan its 0 0 is Ethernet OSPF will see this as a broadcast media but cost is 38 00:03:50,010 --> 00:03:54,000 one once again referring back to the OSPF formula. 39 00:03:54,270 --> 00:03:57,170 A hundred meg link will have a cost of 1. 40 00:03:57,270 --> 00:04:00,560 Notice the priority is 12:54 which is the default. 41 00:04:00,840 --> 00:04:03,820 There is no designated route on this network. 42 00:04:03,990 --> 00:04:06,240 The hollow interval is 10 seconds. 43 00:04:06,240 --> 00:04:08,530 The data interval is 40 seconds. 44 00:04:08,550 --> 00:04:14,160 So a lot of information can be gathered just through the single C'mon topping that come on again. 45 00:04:15,920 --> 00:04:24,830 Notice we have become that busy ignited Rodda our Rodda ideas 10 1 5 1 and the designated Rodda ID is 46 00:04:24,830 --> 00:04:26,350 10 1 5 1. 47 00:04:26,360 --> 00:04:28,140 In other words it's us. 48 00:04:28,220 --> 00:04:35,300 Notice the interface IP address is 10 1 1 1 which is the IP address in this Fosset Ethan interface on 49 00:04:35,300 --> 00:04:40,990 Ethernet as explained rodders will go through an election to determine the designated Rodda and backup 50 00:04:41,000 --> 00:04:42,400 designator Rodda. 51 00:04:42,590 --> 00:04:49,070 And that election has now taken place with our local Rodda becoming the designated Rodda because there 52 00:04:49,070 --> 00:04:51,690 is no other Rodda on the segment. 53 00:04:52,040 --> 00:04:57,890 So we are the defacto designated Rodda always be a high of it has not been enabled on the serial once 54 00:04:57,890 --> 00:05:02,010 they've zero interface and serial once one interface. 55 00:05:02,120 --> 00:05:03,570 So let's do that now. 56 00:05:04,010 --> 00:05:08,510 I can talk the claim on network standard one to two to one the IP address of serial. 57 00:05:08,570 --> 00:05:10,070 One slash zero. 58 00:05:10,520 --> 00:05:18,770 Once again put in my wildcard mosque once again put in my area now stopping to come on show the OSPF 59 00:05:18,770 --> 00:05:25,860 interface allows me to see that OSPF is enabled on cereal once selected 0 as well as FOSS. 60 00:05:25,870 --> 00:05:27,530 Ethan its zero slash. 61 00:05:28,010 --> 00:05:33,290 Hitting spacebar shows me that OSPF is not enabled on any other interfaces. 62 00:05:33,500 --> 00:05:46,060 So once again Network 10 1 5 1 wildcard mosque and area will enable OSPF on the serial ones wanting 63 00:05:46,060 --> 00:05:55,060 to face show Id always be if interface shows me that beef is now enabled on Syria one slice one cereal 64 00:05:55,100 --> 00:05:57,790 one slice 0 as well as fast. 65 00:05:57,790 --> 00:05:59,890 Ethan it is 0 0. 66 00:06:00,950 --> 00:06:07,980 Being that come on again allows me to see information relating to the serial interfaces. 67 00:06:08,020 --> 00:06:15,670 Notice that on both serial interfaces the Prozess ID is one as you would expect the Rodda ID is 10 1 68 00:06:15,670 --> 00:06:24,110 5 1 as you would expect the network type however it's point to point OSPF is intelligent enough to realize 69 00:06:24,110 --> 00:06:30,190 that this is a point to point link and thus the OSPF time sixty point point. 70 00:06:30,230 --> 00:06:36,420 Notice the cost is 7 8 1 which is the cost of a 128 kilobits per second link. 71 00:06:36,500 --> 00:06:39,500 Once again the hollow interval is 10 seconds. 72 00:06:39,500 --> 00:06:41,440 The interval is 40 seconds. 73 00:06:41,780 --> 00:06:47,590 But what you see here is designated Rodda and backup designated Rodda. 74 00:06:47,720 --> 00:06:53,510 There is no need for an election on a point to point link because there are only two routers communicating 75 00:06:53,510 --> 00:06:54,480 with each other. 76 00:06:54,860 --> 00:06:56,920 So no election has taken place. 77 00:06:57,070 --> 00:07:06,690 So just to give you the full Semitics of command control Zayde show IP OSPF interface shows me the interfaces 78 00:07:06,700 --> 00:07:15,060 that OSPF is enabled on show IP protocols will allow me to see the writing protocols enabled in Misrata. 79 00:07:15,190 --> 00:07:22,660 And as you can see here OSPF one has been unable the Rodda ID for the local raht is 10 1 5 1. 80 00:07:22,990 --> 00:07:27,770 The number of areas configured on this route is one with one normal area. 81 00:07:28,000 --> 00:07:36,520 Most of areas and no not so Stubley areas stubborn not to study areas or special types of OSPF areas 82 00:07:36,640 --> 00:07:39,860 used to reduce the number of rats in the writing table. 83 00:07:40,000 --> 00:07:45,400 The maximum number of parts that we will load balance across by default is four that could be changed 84 00:07:45,400 --> 00:07:46,900 to 16. 85 00:07:46,900 --> 00:07:53,450 We are opting for the following networks 10 1 1 1 10 1 2 1 10 1 5 1. 86 00:07:53,590 --> 00:07:59,420 Notice the mosques we have specified the individual IP addresses. 87 00:07:59,560 --> 00:08:06,130 When we entered the network command the referenced bandwidth is 100 megabits per second which is the 88 00:08:06,130 --> 00:08:10,620 default the administrative distance of OSPF is 110. 89 00:08:10,930 --> 00:08:18,410 Topping the come on show Aki Raat shows me that I only have directly connected routes in my writing 90 00:08:18,410 --> 00:08:19,090 table. 91 00:08:19,280 --> 00:08:26,810 The reason why is we have not enabled OSPF on Route 2 and Route 3 so we are not receiving rocks from 92 00:08:26,900 --> 00:08:29,140 either of those routers. 93 00:08:29,250 --> 00:08:31,180 I can top that come on show ID. 94 00:08:31,260 --> 00:08:38,540 Yes which gives me a lot of information relating to the gif process running on this router. 95 00:08:38,940 --> 00:08:43,930 Once again process one is being unable the Rodda IDs 10 1 5 1. 96 00:08:44,130 --> 00:08:52,410 We can see timers and statistics like this for instance initial SPF schedule delay five 5000 milliseconds. 97 00:08:52,650 --> 00:09:00,690 The Rotto will wait 5 seconds before running the Ischia algorithm when notified of a network going down 98 00:09:00,780 --> 00:09:04,530 or a new network that's being added to the topology. 99 00:09:04,560 --> 00:09:10,900 The idea of this is to allow the network to stabilize before running the OSPF algorithm. 100 00:09:10,950 --> 00:09:18,010 Notice the minimum hold time between two consecutive SBF algorithm calculations is 10 seconds. 101 00:09:18,010 --> 00:09:23,520 So in other words we will not run the SBF algorithm continuously. 102 00:09:23,520 --> 00:09:29,220 There is a gap of 10 seconds between calculations. 103 00:09:29,380 --> 00:09:35,830 We can see that the backbone area is 0 has been enabled in Misrata and three interfaces have been put 104 00:09:35,830 --> 00:09:37,170 into this area. 105 00:09:37,510 --> 00:09:45,070 No think occasion has been enabled on this area and we lost executed the SPF algorithm about five minutes 106 00:09:45,070 --> 00:09:49,190 ago and it executed three times. 107 00:09:49,330 --> 00:09:58,220 So let's enable OSPF and rockety and see how the output changes Conrado to show the interface brief 108 00:09:58,940 --> 00:10:02,030 will allow me to see the interfaces configured on the router.