1 00:00:00,930 --> 00:00:06,450 In the real world you would never plug a hub between two switches because it'll degrade your network 2 00:00:06,450 --> 00:00:07,800 dramatically. 3 00:00:07,830 --> 00:00:12,420 In the example we've only got the hub in the typologies so that we can capture traffic using wireshark 4 00:00:13,020 --> 00:00:18,930 you would generally have a direct link between the two switches as shown here in out apology have shut 5 00:00:18,960 --> 00:00:25,470 that port down to force all traffic to go via the hub so that we can see what's taking place. 6 00:00:25,680 --> 00:00:31,970 If I unable to port spending tree will block one of these ports so we won't be able to see the traffic. 7 00:00:32,000 --> 00:00:32,910 So at the moment. 8 00:00:33,000 --> 00:00:39,140 PC 1 keeping PC 3 pc 2 can ping PC 4 but they can't ping each other. 9 00:00:39,210 --> 00:00:44,970 So let's set up switch one as all into the land router. 10 00:00:44,970 --> 00:00:53,880 So on switch one show IP interface brief at the moment we have an IP address configured on VLAN 1 in 11 00:00:53,890 --> 00:00:57,950 violent to now wrote a one and router. 12 00:00:58,140 --> 00:01:05,900 Three are still using the IP addressing of a land one which is bad practice. 13 00:01:05,980 --> 00:01:13,530 We can see that so on Rato one show opting to face brief notice the IP address of the device is 10 1 14 00:01:13,530 --> 00:01:15,930 1 1 so I'll change that. 15 00:01:15,930 --> 00:01:25,380 To put it into Villani leavens IP address tendered wonder 11 did one just good practice you could keep 16 00:01:25,380 --> 00:01:31,990 those IP addresses but it will get confusing when you set up a management villaine. 17 00:01:32,100 --> 00:01:37,550 So I'll just configure it correctly at this point on rodder 3. 18 00:01:37,610 --> 00:01:44,800 Currently the IP address is 10 to 1 to 1 2 3 so I'll change that to $10. 19 00:01:44,800 --> 00:01:53,730 One of the 11. three and set up the default gateway tendered one of the 11 to 4 4. 20 00:01:54,180 --> 00:02:02,340 And then we need to configure the Villani 11 on switch 1 interface Villani 11 IP address tendered one 21 00:02:02,890 --> 00:02:06,300 to 11 to 2 for full. 22 00:02:06,600 --> 00:02:12,970 Make sure that that is vi has switched virtual interfaces up which it is. 23 00:02:13,210 --> 00:02:18,480 So can one ping Rato three just two on tests. 24 00:02:18,520 --> 00:02:26,100 So paying 10 1 11 3 yes it can. 25 00:02:26,290 --> 00:02:30,890 Can it ping it to write a TOS using this IP address 10 1 to 2. 26 00:02:31,280 --> 00:02:37,760 Yes it can Kennet ping router for acting as PC too. 27 00:02:37,970 --> 00:02:39,770 So thats 2.4 28 00:02:43,690 --> 00:02:49,700 thats just to some troubleshooting So first thing to confirm is check the interface 29 00:02:52,740 --> 00:02:54,200 that interface looks right. 30 00:02:56,230 --> 00:02:59,540 It's pinging 11 one. 31 00:02:59,670 --> 00:03:01,710 Why is the ping not working. 32 00:03:01,710 --> 00:03:08,110 It's probably because I haven't set up a default gateway on a full Let's confirm that show IP Robert 33 00:03:09,430 --> 00:03:12,140 you know default gateway is configured Saltoun of operating 34 00:03:16,060 --> 00:03:20,680 before I configured the default gateway Let me show you a test that we can do to prove what's happening 35 00:03:21,650 --> 00:03:24,210 on Route 1 on pinging right of 4. 36 00:03:24,580 --> 00:03:31,120 And this debug debug IP ICMP shows us that the traffic hits Rotto 4 but is not getting back. 37 00:03:31,330 --> 00:03:37,960 So we can see that the traffic traverses the network gets here but doesn't get back again and that allows 38 00:03:37,960 --> 00:03:42,030 me to see that it's because my default gateway is not configured. 39 00:03:42,250 --> 00:03:49,810 So IP default gateway tended one to 2 to fight for on route of four because it's in land too. 40 00:03:49,810 --> 00:03:57,170 So once again this device is in Villani Levan devices in Villani Levan. 41 00:03:57,450 --> 00:04:00,190 These two devices on the land too. 42 00:04:00,310 --> 00:04:02,520 So can one ping wrote a. 43 00:04:02,700 --> 00:04:04,360 Yes it can. 44 00:04:04,400 --> 00:04:05,350 So let's have a look. 45 00:04:05,360 --> 00:04:13,730 Actually the editor of one keyframes S. He's brought up one pinging brought a for. 46 00:04:13,930 --> 00:04:15,560 And let's look at the ICMP 47 00:04:19,190 --> 00:04:28,190 and what you'll notice is the messages from 10 1 11 1 to 10 1 to 1 are actually being sent on land to 48 00:04:28,700 --> 00:04:32,390 the return traffic is being sent on the land to. 49 00:04:32,530 --> 00:04:39,860 And that's because the traffic is being sent from Route 1 to switch one and switch one is already doing 50 00:04:39,860 --> 00:04:47,810 that into via routing and then forwarding the traffic to switch to on the violent too. 51 00:04:47,810 --> 00:04:55,510 So it's really changing the Villani information to be villaine to when forwarding it to the other switch 52 00:04:57,330 --> 00:05:01,280 when the traffic goes from Radio 4 to 1. 53 00:05:01,290 --> 00:05:08,430 The traffic gets sent here is an untagged frame and then here it's tagged as violent too when it hits 54 00:05:08,550 --> 00:05:10,990 the switch which is acting as the default gateway. 55 00:05:11,070 --> 00:05:16,980 It does that interval and routing and then forwards it out of this port because it's in Villani Levan 56 00:05:17,550 --> 00:05:21,060 and the traffic is going to a device in Villani Levan. 57 00:05:21,060 --> 00:05:31,770 So hence here we don't actually see the tagged frames but we can see that by adding a Rato on a stick 58 00:05:32,220 --> 00:05:34,050 to do the interview LAN routing. 59 00:05:34,440 --> 00:05:40,770 So what I'll do is remove the interval and riding on switch 1 and configure this device as the routing 60 00:05:40,770 --> 00:05:43,890 device in the topology. 61 00:05:43,890 --> 00:05:51,900 And then what we should see is we should see the tagged frames hit those router and then the tagging 62 00:05:51,990 --> 00:05:53,100 will be changed.