1 00:00:08,820 --> 00:00:19,400 This typology if PC one sends a broadcast way will it go see that switch one and switch to not configured 2 00:00:19,530 --> 00:00:27,960 with any lines except the default villans and draw that to is configured with subnetwork 10 1 1 0 on 3 00:00:27,960 --> 00:00:34,650 gigabit 0 0 and subnet 10 1 2 0 on gigabit 0 1. 4 00:00:34,650 --> 00:00:43,040 In other words the router has an IP address such as the following configured on gigabit 0 00 and an 5 00:00:43,040 --> 00:00:46,390 IP address of the following configured on gigabit to zero. 6 00:00:46,390 --> 00:00:57,550 One way will traffic go if PC one sends a broadcast what do you think Austine order is a great little 7 00:00:57,550 --> 00:01:03,130 application that allows us to generate network traffic. 8 00:01:03,140 --> 00:01:12,230 So before I configure the PC to for traffic what I'll do is configure the router with an IP address 9 00:01:12,290 --> 00:01:20,240 on each interface no configuration has been done on the switches. 10 00:01:22,220 --> 00:01:24,350 So where will traffic go. 11 00:01:28,910 --> 00:01:38,210 If PC one sends a broadcast so show IP interface brief on the router shows us that both interfaces are 12 00:01:38,210 --> 00:01:40,420 up. 13 00:01:40,450 --> 00:01:50,010 Apart from that I've done no configuration has the console for PC one small startup Austrian ATA and 14 00:01:50,070 --> 00:01:56,330 on the East End Interface I'm going to generate traffic. 15 00:01:56,630 --> 00:02:06,020 Now I need to use Ethan at 1 rather than Ethan at 0 on these Austrian audit devices. 16 00:02:06,120 --> 00:02:07,770 So Rick cable the network 17 00:02:10,980 --> 00:02:13,680 the principal however is the same. 18 00:02:13,840 --> 00:02:18,900 All I'm doing is flipping the interface number on the Austrian order devices. 19 00:02:19,360 --> 00:02:21,720 But waybill traffic go. 20 00:02:22,370 --> 00:02:26,130 So I'll start a new stream generation 21 00:02:30,150 --> 00:02:38,890 and I'll configure the PC to generate IP version for traffic that UDP traffic. 22 00:02:39,000 --> 00:02:48,020 I'll configure the MAC address as old ones in other words it's a broadcast frame for the provision for 23 00:02:48,560 --> 00:02:51,210 destination set it to broadcast as well. 24 00:02:54,060 --> 00:02:57,300 So destination MAC addresses old ones. 25 00:02:57,300 --> 00:03:05,680 In other words a broadcast so I provision for destination is a broadcast. 26 00:03:05,860 --> 00:03:14,980 So what all fusee do sort of capture between the switch and the router and I'll also do it on the side 27 00:03:17,370 --> 00:03:28,610 and then all Kaptchuk traffic between the switch on the left and Asciano the PC to as well as three 28 00:03:33,200 --> 00:03:34,040 and four 29 00:03:39,950 --> 00:03:46,250 what I'll do in this case is send a thousand frames at one frame per second. 30 00:03:47,210 --> 00:03:57,490 Click Apply and start sending frames on the Ethan that wanting to face the frames being sent have increased. 31 00:03:57,610 --> 00:04:00,000 We've had about 10 frames S. now. 32 00:04:00,600 --> 00:04:04,030 So on the link between the switch and the broader. 33 00:04:04,030 --> 00:04:13,350 So this is between I was late to switch gigabit to 0 0 and the router on gigabit is 0 0. 34 00:04:13,420 --> 00:04:20,940 We are seeing that to broadcast traffic what about on the Slinky's. 35 00:04:20,960 --> 00:04:29,500 So this is traffic between the router and switch to notice we don't see any UDP traffic. 36 00:04:29,550 --> 00:04:33,980 The broadcast traffic is not being received on this link. 37 00:04:33,980 --> 00:04:36,390 What about this link. 38 00:04:36,410 --> 00:04:46,810 So this is the link between I was VLA a one gigabit port 02 to Asciano or device to filter for UDP traffic. 39 00:04:46,850 --> 00:04:55,620 You can see the broadcast traffic being sent on that port so IP address and laya to address so broad 40 00:04:55,650 --> 00:04:57,390 cross traffic is being sent here. 41 00:04:58,620 --> 00:05:00,060 What about on this link. 42 00:05:00,900 --> 00:05:09,930 So this is the link between Ioway switch to Gigabit 0 1 and Austrian Auda 3. 43 00:05:10,430 --> 00:05:14,280 No broadcast traffic has received that. 44 00:05:14,440 --> 00:05:22,320 And what a box which to Gigabit to 0 2 to ostinato device for no UDP traffic is received there. 45 00:05:25,130 --> 00:05:32,450 We are receiving it between the switch and the router and we are receiving it between the switch and 46 00:05:32,450 --> 00:05:35,350 the second ostinato device. 47 00:05:35,360 --> 00:05:41,720 So in other words a broadcast sent by this device is going to be flooded out of all ports on Alade to 48 00:05:41,720 --> 00:05:44,020 switch except the port in which it arrived. 49 00:05:44,330 --> 00:05:47,690 But a router will block port Costa frames. 50 00:05:47,870 --> 00:05:52,860 Modern routers by default do not forward broadcast frames. 51 00:05:52,910 --> 00:05:58,210 So this topology we have what is called to broadcast domains. 52 00:05:58,220 --> 00:06:03,970 The broader is blocking broadcasts on the link so broadcasts are not forwarded. 53 00:06:04,920 --> 00:06:12,910 Now what happens if we put the PC into separate LAN abune joy to this video if it's been of benefit 54 00:06:12,910 --> 00:06:17,370 to you please like it and please subscribe to my YouTube channel. 55 00:06:17,380 --> 00:06:20,040 I wish you all the very best.