1 00:00:00,800 --> 00:00:09,130 In this example we've got two switches and four routers which are acting as PCs in the typology. 2 00:00:09,180 --> 00:00:16,890 We also got a hub which I'm going to use to capture traffic using wireshark these devices have just 3 00:00:16,890 --> 00:00:17,820 booted up. 4 00:00:17,970 --> 00:00:25,640 So they have no configuration on the first switch or give the switch a hostname of ACE or one. 5 00:00:25,770 --> 00:00:38,710 And on the second switch give it a host name of a to show villain at the moment. 6 00:00:38,710 --> 00:00:46,410 We only have one Internet villaine configured movieland one all ports on the switch are configured in 7 00:00:46,420 --> 00:00:47,900 that villain. 8 00:00:48,000 --> 00:00:55,660 So because switches also have some older villains by default 1083 4 and 5 which we used previously for 9 00:00:55,680 --> 00:01:00,780 FDDI and Token Ring those villains are not used any more today. 10 00:01:03,170 --> 00:01:04,700 Switch to shows something similar. 11 00:01:04,730 --> 00:01:13,230 So show villain brief villain one all ports are configured in villain one has wrote a one which is acting 12 00:01:13,260 --> 00:01:15,110 as our PC. 13 00:01:15,430 --> 00:01:24,660 I'm going to configure the first Ethan an interface with an IP address of 10 1 1 1 slushed 24 mosque 14 00:01:24,870 --> 00:01:26,480 and no shut the interface 15 00:01:29,250 --> 00:01:32,900 on rodder to do something similar. 16 00:01:33,900 --> 00:01:34,950 No shut the interface. 17 00:01:34,950 --> 00:01:37,800 Give it an IP address of 10 1 1 2 18 00:01:41,110 --> 00:01:48,340 so without any further configuration we should be able to ping between Rotto 1 and router to notice 19 00:01:48,340 --> 00:01:57,720 Rodda 2 can ping Rato 1 and router one can ping right to the switches just have a default config. 20 00:01:59,570 --> 00:02:08,030 All ports on the switches are in villaine one we can see that by using the command show interface gigabit 21 00:02:08,030 --> 00:02:18,280 to 00 switch port the port gigabit 00 is using administrative mode to dynamic auto operational mode 22 00:02:18,280 --> 00:02:22,540 at the moment is static access negotiation of trunking is on. 23 00:02:22,570 --> 00:02:29,570 In other words DTP is enabled but at the moment because there is no switch to negotiate with the porters 24 00:02:29,570 --> 00:02:32,300 in Villon one the default Villon. 25 00:02:32,570 --> 00:02:36,740 Now we can see the traffic by doing a capture using wireshark 26 00:02:41,110 --> 00:02:46,560 various traffic is seen here weve got a spanning tree BPT view being sent by the switch. 27 00:02:46,810 --> 00:02:53,530 We can see Cisco discovery protocol messages being sent by the switch as well showing the switch port 28 00:02:54,220 --> 00:02:58,850 the platform and other information. 29 00:02:59,010 --> 00:03:04,230 But what I'd like you to see is all traffic is Ethernet frames. 30 00:03:04,230 --> 00:03:09,620 There is no data to the one Q tagging on these frames. 31 00:03:09,660 --> 00:03:13,580 Let's do a search for ICMP traffic at the moment. 32 00:03:13,590 --> 00:03:16,580 There is no ICMP traffic. 33 00:03:16,650 --> 00:03:26,070 I'll get to Radu one to ping rockety And notice we see the ICMP traffic what you'll notice is we have 34 00:03:26,160 --> 00:03:36,590 the source mac address of Rodda one pinging rodded to protocol type is IP version 4 source IP version 35 00:03:36,590 --> 00:03:42,690 for addresses 10 one on one destination IP addresses 10 1 1 2. 36 00:03:42,880 --> 00:03:50,680 It's a standard isa net frame encapsulating IP and ICMP. 37 00:03:50,680 --> 00:03:55,200 In this case it's an echo and the reply is an echo reply. 38 00:03:55,750 --> 00:03:59,650 There is no ethernet tagging on those frame at all. 39 00:03:59,650 --> 00:04:00,810 It's a standard. 40 00:04:00,970 --> 00:04:08,590 Each Samit frame there is no concept of Villani the novae line information is transmitted on the frame's 41 00:04:10,430 --> 00:04:18,610 even the other frames such SCDP don't show any Vilain information whatsoever. 42 00:04:18,860 --> 00:04:20,070 I'll stop that capture. 43 00:04:22,050 --> 00:04:25,710 This is an access port and this is an access port by default. 44 00:04:25,710 --> 00:04:36,870 The same will be true on switch to configure router 3 with an IP address of 10 1 1 2 3 45 00:04:41,070 --> 00:04:44,850 no shut the interface and do something similar on route a full 46 00:04:50,870 --> 00:04:53,840 no shut IP address 10 1 1 4 47 00:05:00,620 --> 00:05:04,170 Ken Rotto for Ping rodders 3 acting as host 3. 48 00:05:04,310 --> 00:05:05,120 Yes it can. 49 00:05:06,560 --> 00:05:07,880 Start to capture here. 50 00:05:10,090 --> 00:05:18,960 We can see various traffic tops being captured including once again CTP on rotas 3 or ping wrote a full 51 00:05:21,200 --> 00:05:30,960 ping succeeds or full for ICMP And once again you can see that this is a stented Ethan frame. 52 00:05:31,060 --> 00:05:43,190 There is no information about villans contained in these frames just stented Ethan frames. 53 00:05:43,310 --> 00:05:51,120 So the PCs in the typology are unaware of any Vilain information they are sending untagged frames. 54 00:05:51,170 --> 00:05:57,050 In other words stented Ethan It frames to the switches and the switches are sending untagged frames 55 00:05:57,110 --> 00:06:00,140 to the PCs. 56 00:06:00,140 --> 00:06:05,120 Now let's concentrate on switch one for the moment. 57 00:06:05,170 --> 00:06:13,000 I'm going to set the VCP mode of the device to transparent which means it won't try and synchronize 58 00:06:13,120 --> 00:06:15,740 Vilain information with the other switch. 59 00:06:17,490 --> 00:06:23,090 Shrivelling once again shows us that we have one Ethan that villaine configure it. 60 00:06:23,790 --> 00:06:30,010 Let's create relend to show the land brief. 61 00:06:30,050 --> 00:06:36,230 We now have to eat at a villans but no ports are configured in the land to.