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These are the user uploaded subtitles that are being translated: 1 00:00:00,650 --> 00:00:06,010 In that section we're not taking you to the O S peer protocol. 2 00:00:06,060 --> 00:00:16,440 Let's start with the oil SPF over we all the shortest path OSPF is an interior gateway particle IGP 3 00:00:16,470 --> 00:00:24,610 and commonly used in large enterprise networks OSPF is a link state routing protocol providing thrust 4 00:00:24,620 --> 00:00:33,060 Colewort Jones and excellent scalability to find the best path OSPF uses Dykstra algorithm and uses 5 00:00:33,060 --> 00:00:42,270 the cost value as the metric OSPF has fast convergence and an administrative distance volleyer of one 6 00:00:42,270 --> 00:00:45,770 hundred and ten. 7 00:00:45,900 --> 00:00:51,170 Let's go with the OSPF components in an oil spill running rather. 8 00:00:51,210 --> 00:01:05,410 We have three main tables and they are our neighbor table topology table and the routing table neighbor 9 00:01:05,410 --> 00:01:11,780 table kips the list of directly connected to and always be affronting neighbors. 10 00:01:11,800 --> 00:01:18,940 For example in the neighbor table of rather one we have the information or through other two and the 11 00:01:18,940 --> 00:01:25,980 rather tree and in the neighboring table of the other three we have the information for the other two 12 00:01:26,170 --> 00:01:36,760 and the other one and the topology table kips the topology map which lists all possible paths for destination. 13 00:01:36,820 --> 00:01:44,560 For example in the topology table of through other tree to reach this network we have two options as 14 00:01:44,560 --> 00:01:53,660 you can see and they are few from here and from here and all these guys will be in the topology table 15 00:01:54,310 --> 00:02:00,570 and we have also the running table which keeps the best paths for the destination version. 16 00:02:00,640 --> 00:02:08,100 And as you know we have two options to reach here from the other two out of three and they are huge 17 00:02:08,110 --> 00:02:19,220 and here and one of this guys this guy or this guy will be selected as the best throughout and will 18 00:02:19,220 --> 00:02:22,850 be installed into our writing table. 19 00:02:24,440 --> 00:02:33,880 We have two types of OSPF design and there single area and multi-layers SBF in a single area network. 20 00:02:33,950 --> 00:02:41,670 All were others belong to just one area and that is mostly the backbone area which is areas zero. 21 00:02:41,810 --> 00:02:51,680 This kind of design is suitable for small sized networks mostly as you can see in here we have the aerial 22 00:02:51,680 --> 00:03:01,820 zero which is the backbone the real backbone area and all routers are built in the area to area zero 23 00:03:01,850 --> 00:03:12,080 as you can see the secondo SPF design option is Monterrey or SBF in this design we have more than one 24 00:03:12,160 --> 00:03:17,120 areas and other areas must connect to to orea zero. 25 00:03:17,120 --> 00:03:20,790 This design is suitable solution for larger works. 26 00:03:20,870 --> 00:03:31,790 Two degrees processing the overhead as you can see in here we are area 50 0 and areas 60 and other areas. 27 00:03:31,790 --> 00:03:41,610 Each area is connected to the area zero for example area 60 is connected. 28 00:03:41,610 --> 00:03:50,340 Two areas or by using rather three which is an area of border rather and area 50 is connected to area 29 00:03:50,340 --> 00:03:51,040 zero. 30 00:03:51,090 --> 00:04:00,550 By using the rudder 2 which is an area about the other again an area border rather a B or is a kind 31 00:04:00,550 --> 00:04:07,120 of rudder that is located near to border between one or more oil spill areas. 32 00:04:07,240 --> 00:04:14,890 It is used to establish a connection between backbone area and the other was bay area as its a member 33 00:04:14,890 --> 00:04:22,090 of both the main backbone network and the specific areas to which it connects. 34 00:04:22,090 --> 00:04:30,670 As you can see in here we are two area of border others and they are rather two and there are other 35 00:04:30,670 --> 00:04:40,960 tree one interface of through other 3s in backbone area and the other interface is in the area 60 and 36 00:04:40,960 --> 00:04:48,820 one interface of the rather two in the area zero and the other interface is in the area 50 and these 37 00:04:48,820 --> 00:04:57,670 guys are known as the area border rather lets go ahead with the OSPF Peck types. 38 00:04:57,690 --> 00:05:04,410 There are several types of packet's exchange between oil spill for others to provide communication each 39 00:05:04,410 --> 00:05:05,990 other and they are. 40 00:05:06,120 --> 00:05:15,260 Hello there the base description links that request link state update and links that acknowledgement 41 00:05:17,080 --> 00:05:24,780 Hello packet discovers the other voice bespeaking Browder's on the common subnets and declares permit 42 00:05:24,780 --> 00:05:30,040 theirs on which two others must agree to become neighbors. 43 00:05:30,040 --> 00:05:39,970 Hello Pickert are also used to elect deer and media or rudders and Sandt as a multicast to two hundred 44 00:05:40,000 --> 00:05:41,410 and twenty four. 45 00:05:41,480 --> 00:05:48,550 0 0 5 4 IP version 4 networks. 46 00:05:48,820 --> 00:05:51,520 Please pay attention that hello. 47 00:05:51,550 --> 00:06:02,110 And that intervals must match on boat rudders to establish air adjacency between each rudder for internet 48 00:06:02,110 --> 00:06:02,500 links. 49 00:06:02,500 --> 00:06:09,730 Default Hello interval is 10 seconds and the dead interval is 40 seconds. 50 00:06:09,820 --> 00:06:15,280 But these intervals can be modified with the commands as you can see in here. 51 00:06:15,280 --> 00:06:23,760 For example you get into the interface mode and you can define a new hello and that interval time. 52 00:06:23,800 --> 00:06:31,650 For example let's say that we have two others rather one and rather two connected to each other. 53 00:06:32,470 --> 00:06:38,290 And as you know the default Hello timer is 10 seconds for this interface. 54 00:06:38,290 --> 00:06:47,990 Let's say that we are sending Kallos for each 10 seconds rather two and this guy is also sending help 55 00:06:48,100 --> 00:06:51,070 packets each 10 seconds. 56 00:06:51,070 --> 00:07:02,320 For example if I change the hello interval in year to 5 the OSPF neighbors shift between Rather one 57 00:07:02,320 --> 00:07:06,190 or rather two fails immediately. 58 00:07:07,620 --> 00:07:16,870 If I change this guy's Hello interval to 5 seconds to the neighbor ship will come back. 59 00:07:17,110 --> 00:07:22,370 Let's go ahead with the DVD for the links that routing protocols. 60 00:07:22,450 --> 00:07:30,820 It is essential that the links to the database for all the others to Moine synchronized this synchronization 61 00:07:31,060 --> 00:07:39,700 will begin as soon as as an edgy sincere form but when the neighbors or SBF uses the DVD Packards for 62 00:07:39,700 --> 00:07:50,310 the purpose after DPD pickets exchange process do rather may find that it does not have an up to date 63 00:07:50,430 --> 00:07:51,590 database. 64 00:07:51,660 --> 00:08:01,200 The Elazar packet that is used to request pieces of neighbor database that is more up to date of packet 65 00:08:01,200 --> 00:08:08,570 used for sending specifically requests that links state informations which are requested by LSR. 66 00:08:08,680 --> 00:08:12,520 LS You Packards can contain one or more. 67 00:08:12,550 --> 00:08:24,420 LS As always of records the acknowledgment for the receipt of each Elisei multiple Eliseus can be acknowledged 68 00:08:24,510 --> 00:08:27,830 in a single LSA packet. 69 00:08:28,470 --> 00:08:30,210 Let's go ahead with the router. 70 00:08:30,260 --> 00:08:40,020 I determine the choice of rather ID is used to identify a specific device within an OSPF database and 71 00:08:40,020 --> 00:08:46,000 must be unique to prevent unintended or SBF database problems. 72 00:08:46,000 --> 00:08:56,010 Guys keep in mind that while their ID is not an IP address and is not part of any ridable subnet in 73 00:08:56,010 --> 00:09:03,580 the network rather ID is determined as you can see in a year. 74 00:09:03,630 --> 00:09:10,380 First you can define your rather ID by manual configuration on the rider. 75 00:09:10,380 --> 00:09:13,970 Secondly why is IP on a loop. 76 00:09:13,970 --> 00:09:20,580 Big will be selected as the rather ID and third highest IP owner. 77 00:09:20,730 --> 00:09:31,720 None loopback interface will be chosen as a rather ID lets go ahead with the OSPF network types. 78 00:09:32,000 --> 00:09:38,180 We have point a point that works which is a direct connection between two others. 79 00:09:38,180 --> 00:09:43,510 As you can see here we have broadcast multi multi access. 80 00:09:43,710 --> 00:09:49,180 Yes there is a connection between multiple rodders over an Internet network. 81 00:09:49,190 --> 00:09:52,980 As you can see in here we are MDMA. 82 00:09:53,090 --> 00:09:56,770 None bull non-broadcast multi-axis. 83 00:09:56,890 --> 00:10:04,810 There is a connection between multiple rodders again but all were err and answer over x twenty four 84 00:10:04,820 --> 00:10:14,790 five or Frahm relay Network point to multipoint is a connection for multiple rodders over and MDMA with 85 00:10:14,780 --> 00:10:23,150 a hub and spoke says you can see here we're Hobsons boards and we have also virtual links which are 86 00:10:23,450 --> 00:10:26,380 used for connection to backbone area. 87 00:10:26,390 --> 00:10:35,740 If there is a physical problem let's go in with the oil spill designated Grada turn luch look clarionet 88 00:10:35,740 --> 00:10:42,840 works then men are riding devices can produce heavy control traffic as links. 89 00:10:42,880 --> 00:10:49,200 Advertisements are fluted across the network as you can see in here. 90 00:10:49,540 --> 00:10:59,560 OSPF as their signal routes Brodeur's are the collection points are of Eliseus and used to alleviate 91 00:10:59,680 --> 00:11:10,780 the potential traffic problem on all multi-axis networks broadcast and the NBN may be their backup designated 92 00:11:10,780 --> 00:11:12,340 rather is elected. 93 00:11:12,340 --> 00:11:23,200 In case designated RR Grodner fails none the are and none BT or others are known as the DA or other 94 00:11:23,200 --> 00:11:34,660 Durer other dear brothers communicate with the DEA or others or multi-course by using 224 0 0 5. 95 00:11:34,840 --> 00:11:39,990 And please pay attention that is that's an important point. 96 00:11:40,410 --> 00:11:51,550 Every other established fool Edisons the only with the DVR and the BTR it stays in the two ways it with 97 00:11:51,670 --> 00:11:56,430 all other neighbors. 98 00:11:56,530 --> 00:12:04,910 Let's go ahead with the election process in the election process rather with the highest interface. 99 00:12:04,930 --> 00:12:06,940 Priority is elected. 100 00:12:06,990 --> 00:12:11,270 TR And the second highest is the media. 101 00:12:11,740 --> 00:12:19,960 If there is a tie at the interface priority rather with the highest rather ID is elected dier and the 102 00:12:19,960 --> 00:12:27,370 second highest will be DDR and the boot up sequence influence the election process. 103 00:12:27,370 --> 00:12:38,660 We can also change the interface priority by using the IP OSPF property and we can define a property 104 00:12:38,660 --> 00:12:41,300 value for the interface 105 00:12:44,250 --> 00:12:53,190 between rodders Atlanta methods can be used for OSPF security and we have two types of authentication 106 00:12:53,460 --> 00:13:02,220 which are simple password and the and the five in simple password a thumb staycation password is sent 107 00:13:02,250 --> 00:13:12,050 as plaintext at update message and in the M.D for Everton occasion passport is that mean by default 108 00:13:12,180 --> 00:13:16,510 algorithm and that is the most secure method. 109 00:13:18,350 --> 00:13:22,640 And here is the configuration for the end the five ways. 110 00:13:22,720 --> 00:13:30,890 End the five core authentication can be globally enabled for all interfaces or can be configured on 111 00:13:30,890 --> 00:13:34,610 a per interface basis as you can see here. 112 00:13:34,670 --> 00:13:41,340 For example if you want the enable it we are getting into the oil spill. 113 00:13:41,420 --> 00:13:49,490 I'm sorry we are getting into coffee rather more by typing rather OSPF and the process number then we 114 00:13:49,490 --> 00:13:54,150 are typing areas 0 often cation. 115 00:13:54,480 --> 00:13:57,430 Message digest. 116 00:13:57,650 --> 00:14:03,140 Which means I'm going to use message digest upon occasion for the area zero. 117 00:14:03,560 --> 00:14:13,010 Then we can get into the interface mode and we can use the IP or SPF message that is key and the key 118 00:14:13,010 --> 00:14:18,180 number will be in the 5 and our key will be network. 119 00:14:18,230 --> 00:14:24,750 For example an Let's go with the single-A area or SBF version to configure it. 120 00:14:24,980 --> 00:14:33,770 Let's go ahead with the network command network command is used to activate OSPF underspecified interfaces 121 00:14:34,370 --> 00:14:42,650 specifying an interface with the command will include the interface into the OSPF frowning process for 122 00:14:42,650 --> 00:14:46,050 example to configure no SPF in here. 123 00:14:46,250 --> 00:14:53,020 We are typing rather ROIs P.F. and we are choosing a process number. 124 00:14:53,030 --> 00:15:02,090 Then we are typing the network statement as you can see and we are using the wildcard masks and the 125 00:15:02,090 --> 00:15:08,360 area keyword and the name of the areas you can see. 126 00:15:08,560 --> 00:15:11,940 Let's go with the passive interface comment. 127 00:15:12,050 --> 00:15:21,750 The passive interface command is used to disable sending updates out from a specific interface or SBF 128 00:15:21,750 --> 00:15:29,770 does not send help packets on interfaces configured with passive interface Kamat passive interface command 129 00:15:30,000 --> 00:15:35,460 is security an efficient use of sources such as bandwidth. 130 00:15:35,460 --> 00:15:43,840 For example in rather one as you can see in here we are typing a passive interface command passive interface 131 00:15:43,870 --> 00:15:47,120 gig 00 which is this interface. 132 00:15:47,320 --> 00:15:55,820 And that means we're not going to send Telapak Telepictures from here OK do we need to you do we need 133 00:15:55,820 --> 00:15:59,030 to send hello packets from this interface. 134 00:15:59,030 --> 00:16:10,100 Actually no because we don't have any brothers in here to form and neighbor ship let's go with the OSPF 135 00:16:10,160 --> 00:16:14,910 cost OSPF calculates the metric with cost value. 136 00:16:15,130 --> 00:16:24,880 You can find the cost by dividing the referenced bandwidth to interface with the According to the default 137 00:16:24,910 --> 00:16:33,500 or OSPF of metric cost Vallecano calculation the default OSPF cost for fast Internet interface for example. 138 00:16:33,520 --> 00:16:41,230 As you can see here and the gigabit ethernet interfaces are assumed to be the same. 139 00:16:41,260 --> 00:16:49,730 And there seemed to be just one for example if you want to check the cost you can use the show IP or 140 00:16:49,730 --> 00:16:59,500 OSPF interface and the name of the interface and you can see the cost of the gigabit ethernet interface 141 00:16:59,620 --> 00:17:11,020 as one to verify the choice of neighbors we are using the show IP OSPF neighbor command for example. 142 00:17:11,030 --> 00:17:12,570 Or rather one. 143 00:17:12,680 --> 00:17:21,770 If we tightly show IP OSPF name command as you can see here we are seeing the rather ID of the rather 144 00:17:21,860 --> 00:17:32,500 two which is 2 2 2 2 and we are seeing the State of the neighbor ship which is a full state and we're 145 00:17:32,520 --> 00:17:42,620 seeing the IP address of the remote site and we are seeing the interface that we are forming the neighbor 146 00:17:42,620 --> 00:17:47,390 ship our ok to fight the OSPF portico. 147 00:17:47,410 --> 00:17:53,350 We can use the Shway people of course command and we can check the oil spill. 148 00:17:53,410 --> 00:18:00,940 And the process number and we can also see we can also see that if there is an outgoing or the incoming 149 00:18:00,940 --> 00:18:08,500 filter or not we can check the rudder write the values and the numbers that we are running for. 150 00:18:09,420 --> 00:18:18,720 Let's go with the singularly OSPF version 3 configuration with a spear version 3 is the worst beer version 151 00:18:18,720 --> 00:18:29,340 that supports the IP version 6 to make IP routing IP version 6 must be enabled on rather with IPV 6 152 00:18:29,430 --> 00:18:31,960 unicast Walding command. 153 00:18:32,100 --> 00:18:41,740 Firstly And here is the configuration for the OSPF version 3 to configure and OSPF version 3 but we 154 00:18:41,800 --> 00:18:48,980 rather one and rather two on rather one we should make these configurations for example. 155 00:18:48,980 --> 00:18:58,950 The first thing we should do is enabling the IP version 6 running by typing IP V-6 unicast routing. 156 00:18:59,410 --> 00:19:01,020 Then we are typing. 157 00:19:01,070 --> 00:19:10,400 I PVC's rather OSPF and the process number them we are getting into the coffee rather more as you can 158 00:19:10,400 --> 00:19:22,220 see and we can define our rather I.D. in this Maut then what we can do is we need to get into the interface 159 00:19:22,220 --> 00:19:23,020 mode. 160 00:19:23,270 --> 00:19:36,080 And we need to type I previous six I'm sorry in here IPV 6 or SPF the process number and the area and 161 00:19:36,080 --> 00:19:42,130 the area number two way fight OSPF version 3 neighbors. 162 00:19:42,190 --> 00:19:50,880 We are using again the show IP OSPF Nabl commands and we can check the neighbor ID for example. 163 00:19:50,880 --> 00:19:52,010 That is the wrong thing. 164 00:19:52,030 --> 00:19:59,770 I think that would be too true too true for this scenario and we can see the stay the timer interface 165 00:19:59,780 --> 00:20:01,560 informations again. 166 00:20:03,340 --> 00:20:11,110 And we can also use the show IP version 6 porticos command and check the output for the work for kasian 167 00:20:11,110 --> 00:20:13,570 of the OS be a version 3. 19275

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