1 00:00:00,800 --> 00:00:07,980 Some switch one we're going to shut the interface down to force traffic to go via the hub interface 2 00:00:07,990 --> 00:00:10,400 gigabit zero to shut it down. 3 00:00:11,540 --> 00:00:20,080 Show interface gigabit zero or three switch port this port gigabit series three is acting as a trunk 4 00:00:20,560 --> 00:00:25,270 using editor the one key all villains are allowed. 5 00:00:25,440 --> 00:00:29,810 So let's do a capture on the hub. 6 00:00:30,970 --> 00:00:38,320 We were receiving previous information and noticed the difference here has an or that one Q header. 7 00:00:38,350 --> 00:00:40,180 So we have eaten it. 8 00:00:40,540 --> 00:00:45,160 But notice the type is not IP version for the type is a result of one. 9 00:00:45,160 --> 00:00:53,790 Q So the type is zero x 8 100 rather than zero x zero a hundred for IP. 10 00:00:54,070 --> 00:01:03,580 So for one keyframe we can see here that the villain ID for this previous message is VLAN 1 pavilion 11 00:01:03,610 --> 00:01:10,390 spending three cents what are called BPT use on every villain. 12 00:01:10,510 --> 00:01:17,800 So here we can see some spending information and as we scroll down we can see that as an example CGP 13 00:01:18,310 --> 00:01:26,590 and VCP messages on this case DTP is sent as an untagged frame so we can see some DTP information are 14 00:01:26,590 --> 00:01:27,380 arriving here. 15 00:01:28,840 --> 00:01:30,280 And that will continue on. 16 00:01:30,640 --> 00:01:42,500 So let's do a ping from rodded to acting as PC two to four and see if we can see why the frames are 17 00:01:42,500 --> 00:01:43,310 not permitted 18 00:01:46,800 --> 00:01:48,830 so ICMP showing nothing. 19 00:01:49,900 --> 00:01:51,550 So we can see a broadcast here. 20 00:01:51,550 --> 00:01:58,050 This is an OP message saying who has 10 1 2 4. 21 00:01:58,210 --> 00:02:06,500 So in this op message I'll just stop that capture for a moment. 22 00:02:06,760 --> 00:02:13,290 Here's the OP you can see it's an Ethan a two frame with a cost. 23 00:02:13,290 --> 00:02:19,450 So the destination is a broadcast source MAC address is the MAC address of rockety. 24 00:02:19,500 --> 00:02:22,130 We can see that by looking at the interface. 25 00:02:22,180 --> 00:02:23,650 It's a show interface. 26 00:02:24,120 --> 00:02:29,810 If there zero notice there's the MAC address of the router. 27 00:02:30,950 --> 00:02:33,960 And there it is shown in the shock capture. 28 00:02:34,270 --> 00:02:42,170 But notice the type is once again added to the one key and the villain is set to villain to. 29 00:02:42,180 --> 00:02:48,670 So in other words the router is sending the frame untagged to the switch. 30 00:02:48,930 --> 00:02:54,340 But when it goes across this link it's going as a tagged frame. 31 00:02:54,510 --> 00:03:03,390 The switch is setting the violent tag to two because it arrived on this port which is in V land to just 32 00:03:03,390 --> 00:03:14,840 reset that capture what I want to show you is on this port is going to show is untagged standeth in 33 00:03:14,860 --> 00:03:15,260 it. 34 00:03:15,520 --> 00:03:20,430 But on this one it's going to show is tagged because the switch is tagging the frame 35 00:03:25,070 --> 00:03:26,320 so do the ping again. 36 00:03:29,510 --> 00:03:34,950 Now this is the frame to the switch from the router and we'll do a search for up. 37 00:03:35,060 --> 00:03:43,120 You can see there's the traffic from the router to a broadcast address. 38 00:03:43,300 --> 00:03:44,920 It's untagged. 39 00:03:45,040 --> 00:03:50,190 This is the type for up there is no ADA to the one queue headache here at all. 40 00:03:50,920 --> 00:03:58,980 But when we look for up on the link between the switches notice you can see the ADA two to one queue 41 00:03:58,980 --> 00:04:03,900 tag set to. 42 00:04:04,120 --> 00:04:12,250 So the traffic is arriving here is untagged and the switches tagging it to send the frame to switch 43 00:04:12,250 --> 00:04:12,770 to. 44 00:04:12,910 --> 00:04:19,390 The problem here is when the traffic hits switch to switch to is not configured with trunking. 45 00:04:19,390 --> 00:04:27,190 This is just an access port in villaine one so that traffic will be sent on to this port but not out 46 00:04:27,190 --> 00:04:36,970 of this port which is invalid to switch to let's see if we can see that show interface trunk. 47 00:04:37,330 --> 00:04:41,280 At the moment no interfaces are trunking show interface. 48 00:04:41,520 --> 00:04:44,430 Gigabit zeros three. 49 00:04:44,620 --> 00:04:46,670 And let's put switch port at the end. 50 00:04:48,250 --> 00:04:55,690 So show interfaces gigabit is three switch port the interface Gingrich rich 0 3 is enabled. 51 00:04:55,930 --> 00:04:59,500 It's set for negotiation of trunking. 52 00:04:59,650 --> 00:05:02,810 So it's in a LAN one. 53 00:05:02,890 --> 00:05:07,950 This port belongs to veel and one it's an access port. 54 00:05:08,320 --> 00:05:09,880 No trunking is enabled. 55 00:05:10,000 --> 00:05:14,320 So traffic from router to is simply going to be sent out of this port. 56 00:05:14,410 --> 00:05:16,270 So let's do a capture there to prove that 57 00:05:19,120 --> 00:05:24,400 and then we'll do a capture on this port to check if any traffic arrives on this port. 58 00:05:24,400 --> 00:05:32,000 So there's the washup capture do the ping again on Broadway to do a full time for AAP. 59 00:05:32,030 --> 00:05:37,780 And notice there's the broadcast traffic from 10 1 to 2 which is routed to 60 00:05:40,650 --> 00:05:47,380 asking for the mac address of 10 1 to 4 Sarada 2 is asking for the MAC address of rota for. 61 00:05:47,550 --> 00:05:49,710 But it never receives that. 62 00:05:49,710 --> 00:05:54,550 So what you'll also notice here is there is no added to the queue tag. 63 00:05:54,960 --> 00:05:57,660 So the frame was St. untagged here. 64 00:05:57,780 --> 00:06:01,740 It was sent tagged across here arrived yet. 65 00:06:02,130 --> 00:06:04,930 But this port was configured as an access port and we learned one. 66 00:06:05,130 --> 00:06:10,650 So the traffic was simply copied out of this port in the land one with no tag the traffic never arrived 67 00:06:10,650 --> 00:06:12,010 on this port. 68 00:06:12,240 --> 00:06:14,530 So let's prove that to capture here. 69 00:06:17,860 --> 00:06:26,670 Well do the ping again and try and filter for up and what you'll notice is there's no up traffic because 70 00:06:26,670 --> 00:06:31,030 the traffic is arriving on an access port Port one. 71 00:06:31,170 --> 00:06:34,410 It's only going to be sent out of this port which is port one. 72 00:06:34,470 --> 00:06:37,090 It's not going to be sent out of this port at all. 73 00:06:37,230 --> 00:06:44,260 So let's stop all captures and then what we'll do now is configured this port to be a trunk port and 74 00:06:44,260 --> 00:06:45,680 the port to be a trunk port. 75 00:06:45,880 --> 00:06:50,970 But we'll leave the port shut down for the moment so that we can see the traffic being captured.