1 00:00:00,710 --> 00:00:08,820 In this video we're going to discuss OSPF version 3 or open shortest path first version 3 Always version 2 00:00:08,820 --> 00:00:14,100 3 provides a routing capabilities for IP version 6. 3 00:00:14,100 --> 00:00:21,120 Most engineers when they talk about SPF are referring to OSPF version 2 which provides a unique cost 4 00:00:21,140 --> 00:00:23,560 routing for IP version 4. 5 00:00:23,880 --> 00:00:31,100 However if you have IP version 6 addresses configured you can't use OSPF version 2 because i always 6 00:00:31,190 --> 00:00:36,520 a version two only supports IP version 4 and not IP version 6. 7 00:00:36,810 --> 00:00:46,590 OSPF version 3 expands on OSPF version 2 to provide support for routing IP version 6 prefixes and support 8 00:00:46,590 --> 00:00:49,840 for 128 IP V-6 addresses. 9 00:00:49,890 --> 00:00:54,690 There's a lot of similarity between OSPF version 2 and OSPF version 3. 10 00:00:54,780 --> 00:00:59,970 So we have the concept of elysées we have the concept of areas and so forth but be aware that these 11 00:00:59,970 --> 00:01:02,490 protocols are independent of each other. 12 00:01:02,650 --> 00:01:10,010 We have a version 2 will advertise IP version 4 networks and OSPF version 3 is able to advertise our 13 00:01:10,010 --> 00:01:12,480 PV 6 networks. 14 00:01:12,480 --> 00:01:16,810 They can be configured on the same router but run independently of each other. 15 00:01:16,830 --> 00:01:19,380 In other words they have separate databases. 16 00:01:19,380 --> 00:01:25,300 They use different addresses for advertisements and they don't communicate with one another. 17 00:01:25,320 --> 00:01:29,400 So here are some examples of similarities between the two protocols. 18 00:01:29,400 --> 00:01:37,560 They are both a link state routing protocols they both to use the same area design concepts and terms. 19 00:01:37,560 --> 00:01:43,710 So we have a backbone area we have Area border routers and autonomy system border routers and so forth 20 00:01:44,430 --> 00:01:51,050 the way that you enable the running protocol is different in OSPF version 3 versus OSPF version 2 you're 21 00:01:51,060 --> 00:01:58,800 still enabling the writing protocol on interfaces but in OSPF version to use the network command whereas 22 00:01:58,800 --> 00:02:06,120 in OSPF version 3 you go on to the interface and enable P.F. when OSPF is enabled on an interface the 23 00:02:06,120 --> 00:02:10,540 routers can discover one another on directly connected links. 24 00:02:10,620 --> 00:02:14,510 They both check various settings before and the relationship is established. 25 00:02:14,550 --> 00:02:20,370 So as an example both routers need to be in the same area to form a neighbor relationship and share 26 00:02:20,370 --> 00:02:26,880 the same password if authentication has been enabled both protocols use link state advertisements to 27 00:02:26,880 --> 00:02:32,040 advertise details of the network and they both bold link state databases. 28 00:02:32,310 --> 00:02:38,580 They both use the shortest path first algorithm or SPF or Dykstra is algorithm to determine the best 29 00:02:38,580 --> 00:02:41,510 path to a network. 30 00:02:41,520 --> 00:02:47,910 Networks are based on the cost of an interface with the same default metric based on 100 meg interface 31 00:02:48,650 --> 00:02:55,980 elysées are also flooded throughout the OSPF domain but there are some differences in the less space 32 00:02:56,220 --> 00:03:00,730 between always be a version 2 and OSPF version 3. 33 00:03:00,750 --> 00:03:06,980 The differences in the Alesis and the way the databases are structured are out of the scope of the CCMA 34 00:03:07,020 --> 00:03:15,120 certification both protocols use a 32 bit Rodda ID to identify a router if you are running a pure IP 35 00:03:15,120 --> 00:03:18,770 V-6 network which we can do in a moment. 36 00:03:18,780 --> 00:03:27,330 Using this topology you need to manually configure a 32 bit Rodda ID on each Rodda always be Version 37 00:03:27,330 --> 00:03:32,870 3 users IP version 6 a link local addresses for neighbor relationships. 38 00:03:33,000 --> 00:03:40,730 That's different to be if a version to which used IP version 4 interface IP addresses for the neighbor 39 00:03:40,790 --> 00:03:46,740 relationship establishment in OSPF version 2 you had to make sure that the neighboring routers were 40 00:03:46,740 --> 00:03:48,260 in the same subnet. 41 00:03:48,450 --> 00:03:50,930 Otherwise they wouldn't form a neighbor relationship. 42 00:03:51,270 --> 00:03:57,270 But in OSPF version 3 The neighbor relationship is now formed using a link local address instead of 43 00:03:57,570 --> 00:03:59,650 an interface IP address. 44 00:03:59,640 --> 00:04:02,690 OSPF version 3 uses multicast address. 45 00:04:02,730 --> 00:04:12,390 If f is 0 2 colon colon 5 to advertise information to always be for hours and F-F 0 2 colon colon 6 46 00:04:12,570 --> 00:04:16,230 for OSPF designated router and backup designated router. 47 00:04:16,560 --> 00:04:26,460 That's very similar to a version 2 which uses 2 2 4 0 0 5 and 2 2 4 0 0 6 the same protocol number is 48 00:04:26,460 --> 00:04:34,740 used IP version 6 protocol number is 89 for version 3 and always version 2 uses IP version 4 protocol 49 00:04:34,740 --> 00:04:36,800 number 89. 50 00:04:36,820 --> 00:04:40,890 So now let's look at how to configure this network using version 3. 51 00:04:40,900 --> 00:04:43,120 This is a pure IP version 6 network.