All language subtitles for 1. What happens when you disable Spanning Tree

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Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated: 1 00:00:10,330 --> 00:00:15,070 He's spending pretty important in Ethernet networks. 2 00:00:15,090 --> 00:00:17,490 Why is that important. 3 00:00:17,490 --> 00:00:21,160 What happens when you disable spanning tree. 4 00:00:21,230 --> 00:00:22,630 I you crazy. 5 00:00:23,410 --> 00:00:29,840 So to help answer those questions I've got a package to trace a network consisting of two pieces. 6 00:00:29,880 --> 00:00:37,950 P.S. 1 and P.S. 2 which are connected to layered two switches these switches are running a default configuration 7 00:00:38,550 --> 00:00:43,980 and as you can see in Packet Tracer this interface is blocking. 8 00:00:43,980 --> 00:00:48,420 So in other words spending tree is blocking on this port. 9 00:00:48,660 --> 00:00:54,750 We can see that by looking after the C a lie over the switch. 10 00:00:54,750 --> 00:01:05,370 So show spanning tree shows us that gigabit 1 02 has an alternate roll in spending tree under the current 11 00:01:05,430 --> 00:01:07,170 status is blocking. 12 00:01:07,260 --> 00:01:15,420 That means that for example pings from P.S. want to P.S. two will be sent across this link gigabit 1 13 00:01:15,420 --> 00:01:18,030 0 1 and not across gigabit. 14 00:01:18,030 --> 00:01:19,980 1 0 2. 15 00:01:20,470 --> 00:01:27,120 BPT use or bridge protocol data units and some other management traffic will be sent and received on 16 00:01:27,120 --> 00:01:34,650 this port such as Cisco Discovery Protocol and Link Layer Discovery Protocol or CTP and a little DP 17 00:01:34,890 --> 00:01:39,920 but user traffic will not be received or transmitted under this port. 18 00:01:40,020 --> 00:01:44,540 So what happens if you disable spanning tree on both of these switches. 19 00:01:44,610 --> 00:01:46,290 What will happen to the network 20 00:01:51,020 --> 00:01:53,820 now before I continue let me warn you. 21 00:01:53,960 --> 00:02:01,130 You use this packet tracer lab at your own risk if you disable spanning tree switches as I'm going to 22 00:02:01,130 --> 00:02:10,040 do in this video your piece CB you could go to 100 percent packet tracer could crash and other nasty 23 00:02:10,040 --> 00:02:11,210 things could happen. 24 00:02:11,570 --> 00:02:16,170 So if you follow what I'm going to do here the risk is entirely yours. 25 00:02:16,220 --> 00:02:21,590 So what do you think's going to happen when we disable spanning tree on both of these switches. 26 00:02:21,590 --> 00:02:23,440 How will traffic flow. 27 00:02:23,440 --> 00:02:30,550 So as an example of P.S. One sends a ping to P.C. to how will packets traverse the network. 28 00:02:30,620 --> 00:02:37,530 What will happen to help demonstrate that you can use simulation mode in Packet Tracer. 29 00:02:37,670 --> 00:02:42,860 And for this example I'm only going to look at OP and ICMP traffic. 30 00:02:43,830 --> 00:02:51,390 If you want to try this yourself or download the packet to trace a file and use simulation mode in Packet 31 00:02:51,420 --> 00:02:56,370 Tracer but again doing what I'm going to do here. 32 00:02:56,430 --> 00:02:58,530 Done at your own risk. 33 00:02:58,530 --> 00:03:04,350 I'm not going to demonstrate what happens when spending Tre is disabled on both of these switches and 34 00:03:04,350 --> 00:03:06,540 show you how packets flow in the network. 3471

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