1 00:00:00,281 --> 00:00:04,885 In the previous video, we already create topology  with 2 router. 2 00:00:05,302 --> 00:00:10,402 And we also already configure the ip address for all router and pc. 3 00:00:11,134 --> 00:00:18,475 Next in this video, we are going to learn about the differences between static and dynamic routing. 4 00:00:19,489 --> 00:00:24,200 When we configure static routing, we add the routing manually, 5 00:00:26,197 --> 00:00:33,081 so ip route, the destination, and then the next hop or gateway. 6 00:00:34,014 --> 00:00:41,104 So we tell the router, the destination and the next hop. Let’s see the command, 7 00:00:41,649 --> 00:00:45,219 Here ip route and then the destination, 8 00:00:46,004 --> 00:00:55,928 192.168.2.0 255.255.255.0, and the next hop is 10.10.10.2, 9 00:00:56,449 --> 00:01:08,567 so we tell router 1, if router 1 want to go to 192.168.2.0/24, router 1 should go to 10.10.10.2. 10 00:01:09,341 --> 00:01:12,494 But if we configure dynamic routing, 11 00:01:12,494 --> 00:01:18,441 we don’t need to do that, but we need to advertise all of connected network. 12 00:01:21,000 --> 00:01:29,932 Let’s say here in router 1, router 1 have 2 connected network, which is 10.10.10.0/24 13 00:01:30,080 --> 00:01:37,710 and 192.168.1.0/24. So router 1 will advertise this 2 network, 14 00:01:38,447 --> 00:01:43,878 When router 1 advertise this 2 network, router 1 will tell router 2, 15 00:01:44,136 --> 00:01:55,540 "hey router 2, I have 2 network behind me, which is 10.10.10.0/24 and 192.168.1.0/24. 16 00:01:56,324 --> 00:02:01,764 So if you want to go to this 2 network, you can go through me". 17 00:02:02,599 --> 00:02:11,705 When router 2 receive advertise from router 1, router 2 will see it’s routing table. Here router 2 18 00:02:11,705 --> 00:02:24,430 already have information about 10.10.10.0/24, but router 2 don’t know about 192.168.1.0/24 yet. 19 00:02:25,319 --> 00:02:34,383 So router 2 automatically add network 192.168.1.0/24 to it’s routing table, 20 00:02:34,609 --> 00:02:41,824 and the next hop will be router 1, because router receive this information from router 1. 21 00:02:42,482 --> 00:02:47,768 Let’s write it, let’s say this is dynamic, 22 00:02:49,567 --> 00:02:56,777 When router 2 receive 10.10.10.0/24, router 2 already have an information about this, 23 00:02:57,104 --> 00:03:06,261 so we don’t need to write it, and then when router 2 receive an information about 192.168.1.0/24, 24 00:03:06,425 --> 00:03:09,481 router 2 don’t know about this network yet, 25 00:03:09,647 --> 00:03:13,730 so router 2 will add this network to the routing table. 26 00:03:19,170 --> 00:03:23,755 This is also work when router 2 advertise the connected network. 27 00:03:25,924 --> 00:03:34,562 Router 2 will advertise 10.10.10.0/24 and 192.168.2.0/24. 28 00:03:36,300 --> 00:03:42,646 When router 1 receive advertise from router 2, router 1 will see the routing table, 29 00:03:43,051 --> 00:03:48,895 router 1 already have an information about 10.10.10.0/24, 30 00:03:49,191 --> 00:04:00,427 but router 1 don’t know about 192.168.2.0/24, so router1 will have new network in the routing table automatically, 31 00:04:00,619 --> 00:04:10,738 which is 192.168.2.0/24 and the next hop is router 2, which is 10.10.10.2 32 00:04:11,889 --> 00:04:21,261 I am sorry here I do a mistake, in the router 2, the dynamic routing should be 192.168.1.0/24. 33 00:04:23,832 --> 00:04:30,334 Okay this is the concept of dynamic routing. So remember that if we use dynamic routing, 34 00:04:30,334 --> 00:04:33,756 each router will advertise their connected network, 35 00:04:33,911 --> 00:04:40,805 and then the routing will added automatically, we don’t need to add routing manually anymore. 36 00:04:41,477 --> 00:04:47,159 Okay I think enough for this video, in the next video we are going to learn 37 00:04:47,159 --> 00:04:49,693 how to configure dynamic routing. 38 00:04:50,255 --> 00:04:53,739 Thank you for watching and see you on the next video.