1 00:00:00,270 --> 00:00:01,320 In Janus three. 2 00:00:01,320 --> 00:00:06,030 I'm going to drag an absentee host to the workspace. 3 00:00:08,160 --> 00:00:11,880 This Ubuntu host will be our PC in the topology. 4 00:00:12,150 --> 00:00:19,110 I'm also going to drag a router into the topology and I'll add an ethernet switch. 5 00:00:19,810 --> 00:00:21,130 To the topology. 6 00:00:21,960 --> 00:00:26,670 So very simple topology of a PC, a switch and a router. 7 00:00:29,630 --> 00:00:33,500 I'll connect to the PC, to the switch and to the switch to the router. 8 00:00:34,250 --> 00:00:40,610 That's how the devices are connected to one another, and I'll start the devices up. 9 00:00:40,790 --> 00:00:44,990 There's no configuration on any of these devices at the moment. 10 00:00:45,830 --> 00:00:48,110 Let's open up a console to the PC. 11 00:00:49,830 --> 00:00:58,530 We can see that it's an Ubuntu PC called a 1 to 1 and if I use the command if config is zero, you'll 12 00:00:58,530 --> 00:01:06,000 notice that the PC doesn't have an IP version for address configured, but it does have a IP version 13 00:01:06,000 --> 00:01:07,950 six a link local address. 14 00:01:08,520 --> 00:01:11,010 This is the mac address of the PC. 15 00:01:11,040 --> 00:01:13,110 Notice it ends an e nine. 16 00:01:13,320 --> 00:01:17,040 This is the link local address of the PC. 17 00:01:17,640 --> 00:01:24,150 Notice IP version six address f 80 slash 64 mask. 18 00:01:24,920 --> 00:01:26,870 Scope is link local. 19 00:01:27,470 --> 00:01:29,600 So let's have a look at the router. 20 00:01:30,700 --> 00:01:32,650 The Rada has just booted. 21 00:01:32,920 --> 00:01:39,910 A default configuration has been applied in this example, but what you'll notice is all interfaces 22 00:01:39,910 --> 00:01:41,500 are currently shut down. 23 00:01:41,530 --> 00:01:44,130 Show IP interface gigabit. 24 00:01:44,200 --> 00:01:45,160 Zero zero. 25 00:01:45,730 --> 00:01:48,970 Shows us that the protocol is down. 26 00:01:49,090 --> 00:01:50,950 Show IPV six. 27 00:01:50,950 --> 00:01:54,130 Interface gigabit is zero zero. 28 00:01:54,130 --> 00:01:55,740 Shows no output. 29 00:01:55,750 --> 00:02:02,740 Show IPV six interface brief no IP version six addresses are configured. 30 00:02:02,920 --> 00:02:05,860 All the interfaces are shut down. 31 00:02:06,400 --> 00:02:09,220 In other words, they administratively shut down. 32 00:02:09,789 --> 00:02:14,200 What I'm going to do at this point is shut down the PC. 33 00:02:14,650 --> 00:02:18,160 So I want to turn it off and then I'm going to configure the router. 34 00:02:18,940 --> 00:02:24,910 What I also want to do is run a Wireshark capture on this link so that we can see. 35 00:02:26,280 --> 00:02:30,600 Any messages that are sent by either the PC or the rather. 36 00:02:31,640 --> 00:02:35,120 So at the moment we're not seeing any Wireshark captures. 37 00:02:35,510 --> 00:02:38,120 But what I'll do on the right is give it a name. 38 00:02:39,470 --> 00:02:43,610 I'll enable IPV six unique cost routing. 39 00:02:45,120 --> 00:02:55,560 Go on to gigabit zero zero and let's configure an IPV six address of 2001 face colon colon one slash 40 00:02:55,560 --> 00:02:56,520 64. 41 00:02:56,940 --> 00:03:00,150 So do show run interface gigabit zero zero. 42 00:03:00,750 --> 00:03:09,210 All I've done is configure an IP version six address on the interface and enable IPV six unicast routing. 43 00:03:09,450 --> 00:03:16,140 When I know shut the interface, what we should notice is IP version six messages are sent and there 44 00:03:16,140 --> 00:03:16,800 they are. 45 00:03:17,400 --> 00:03:20,880 So here's a multicast message. 46 00:03:21,300 --> 00:03:30,420 This is to do with MLD, that multicast is used for the multicast listener discovery protocol or MLD 47 00:03:30,450 --> 00:03:31,620 version two. 48 00:03:34,870 --> 00:03:42,490 So MLD reports are sent to this address EF zero two Colon. 49 00:03:42,490 --> 00:03:43,720 Colon 16. 50 00:03:43,870 --> 00:03:47,260 But for now, we won't concern ourselves with that protocol. 51 00:03:47,500 --> 00:03:48,760 Notice, here's an example. 52 00:03:48,760 --> 00:03:57,220 We have a neighbor solicitation message from a device with this source MAC address 82900. 53 00:04:00,990 --> 00:04:06,330 So let's have a look at the Mac address of that interface. 54 00:04:06,600 --> 00:04:11,580 So show IPV six rather interface gigabit is zero zero. 55 00:04:12,000 --> 00:04:15,720 What you'll notice is this is the link local address of the router. 56 00:04:16,820 --> 00:04:20,690 And the router has joined multiple multicast groups. 57 00:04:21,260 --> 00:04:28,130 This is the global unicast address and if we do show interface gigabit is zero zero, you can see that 58 00:04:28,130 --> 00:04:30,890 that's the burnt in address of the router. 59 00:04:31,160 --> 00:04:33,710 So ending in 8900. 60 00:04:35,000 --> 00:04:38,180 So this is the router sending a message. 61 00:04:39,320 --> 00:04:43,400 If we open this up, we can see MLD messages. 62 00:04:43,880 --> 00:04:48,410 I notice she has a neighbor solicitation message from the rather. 63 00:04:52,950 --> 00:04:54,990 I'll filter for IPv6. 64 00:04:55,650 --> 00:04:57,420 So we only see those messages. 65 00:04:57,420 --> 00:05:01,200 And here again, you can see the neighbor solicitation message. 66 00:05:02,270 --> 00:05:04,730 Here we have a rather advertisement message. 67 00:05:04,730 --> 00:05:07,130 So the rot is advertising itself. 68 00:05:07,970 --> 00:05:11,810 Notice it's advertising the source of link layer address. 69 00:05:11,810 --> 00:05:13,580 So that's the mac address of the router. 70 00:05:14,360 --> 00:05:23,150 We can see the empty view and notice here prefix information 2001 colon face colon. 71 00:05:23,150 --> 00:05:24,830 Colon slash 64. 72 00:05:26,750 --> 00:05:29,690 So again, show run interface gigabit zero zero. 73 00:05:30,260 --> 00:05:36,770 That is the network that we configured on the Rado show IP version six interface gigabit 200. 74 00:05:37,040 --> 00:05:43,700 That is the global unicast address on the router and that is the subnet that's been advertised. 75 00:05:44,840 --> 00:05:50,720 So the Raiders advertising that network through a rather advertisement message. 76 00:05:51,080 --> 00:05:52,820 If we scroll down. 77 00:05:54,300 --> 00:05:57,990 You'll notice that that is continually advertised. 78 00:05:58,020 --> 00:06:06,600 Here is another neighbour advertisement from the Router's IP address to all devices on the local segment. 79 00:06:08,320 --> 00:06:10,780 And going back to advertisement. 80 00:06:11,560 --> 00:06:15,190 Notice it's sending it to all hosts on the local segment. 81 00:06:15,760 --> 00:06:17,680 Wireshark shows this quite nicely. 82 00:06:17,680 --> 00:06:19,570 There is a neighbor advertisement. 83 00:06:19,600 --> 00:06:27,580 Here again is a router advertisement message with the prefix and the right is continually advertising 84 00:06:27,580 --> 00:06:28,720 that network.