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This is a free, complete course for the CCNA.
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If you like these videos, please subscribe\n
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Also, please like and leave a comment, and\n
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Also, remember to download this practice lab\n
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If you want more labs like these, I highly\n
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the CCNA, click the link in the video description\n
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It’s a network simulator like packet tracer,\n
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to CCNP level even, whereas Packet Tracer\n
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Here, you can see all of the labs available\nNetSim for CCNA.
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These are all detailed, guided labs that not\n
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but really test your understanding, so I think\n
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If you want more practice relevant to what\n
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course, look here in the ‘network access’\nsection.
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VLANs, Trunking, this is all stuff you’ve\n
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Make sure to stick around to the end of this\n
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If you want to grab a copy of NetSim for CCNA,\n
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Okay, let’s get started with today’s lab.
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First off, all of these devices are preconfigured\n
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17’s lab, except SW2 has been replaced with\n
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So, all of the hosts are already in the correct\n
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and R1 and SW2 are connected using router\non a stick.
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So what we’ll be doing is changing this\n
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routing via SVIs on SW2, just like in the\nlecture video.
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Step 1 is to replace the router on a stick\n
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I’ll start on R1 first. Enter privileged\n
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First, let’s check the running config of\n
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SHOW RUN. By the way, you can press enter\n
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at a time, or the spacebar to scroll one screen\nat a time.
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So, the physical interface itself has only\n
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Under it you can see the three subinterfaces.
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Let’s check the status of the interfaces.
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G0/0 and its subinterfaces are all UP/UP.
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Now, let’s remove the subinterfaces.
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Enter global config mode with CONF T. Then\n
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Then, hit the up arrow, and let’s change\nthis to .20.
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DO SHOW RUN. So, the subinterfaces have disappeared.
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Now, this is a difference between packet tracer,\n
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When I do the lecture videos, I used GNS3,\n
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packet tracer, which is just a simulator.
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On GNS3, the subinterfaces still appear with\n
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the device, but as you can see here they are\n
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Now, let’s configure G0/0 with an IP address.
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IP ADDRESS 10.0.0.194 255.255.255.252.
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Okay, that’s all we need to do on R1.
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In the lecture video I did DEFAULT INTERFACE\n
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that’s not actually necessary, since it\n
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Okay, next let’s configure SW2’s G1/0/2 interface. Enter\n
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And let’s check the config of G1/0/2.
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Notice this layer 3 switch requires the SWITCHPORT\n
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The model of switch used in the previous lab didn’t require this.
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Okay, let’s return the interface to the\ndefault configuration.
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Enter global config mode, CONF T. Then, DEFAULT INTERFACE G1/0/2.
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When testing this lab out before I had to\n
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might be a packet tracer issue, but I’ll\n
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Okay, so G1/0/2’s configurations have been\nremoved.
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IP, then I'll use the question mark.
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Notice there is no option for ADDRESS, why\nis that?
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It’s because this interface is still in\nlayer 2 mode.
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Let’s put it into Layer 3 mode.
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Now we have lots of options here, including\n
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ADDRESS 10.0.0.193 255.255.255.252.
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Finally, let’s configure the default route\nhere on SW2.
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And let’s check the current routing table.
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No routes appear, even though we should have\n
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It’s because we haven’t enabled IP ROUTING\n
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And let’s view the routing table once again.
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Notice that only a connected route appears,\nno local route.
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When I showed you the command in the lecture\n
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think this might be an issue with packet tracer,\n
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Anyway, let’s configure that default route.
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IP ROUTE 0.0.0.0 0.0.0.0, and the next hop\n
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Okay, the default route has been added.
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Step 2 is to configure the SVIs on SW2.
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First off, let’s check if the necessary\nVLANs exist.
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Remember, an SVI won’t have a status of\n
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Okay, VLANs 10, 20, and 30 exist.
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Let’s configure those SVIs, it’s fairly\nsimple.
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Okay, the SVI has been created, now all we\n
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usable address of the subnet in this case.
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IP ADDRESS 10.0.0.62 255.255.255.192.
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IP ADDRESS 10.0.0.126 255.255.255.192.
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IP ADDRESS 10.0.0.190 255.255.255.192.
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Now let’s check if the interfaces are UP/UP.
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DO SHOW IP INTERFACE BRIEF. Okay, looks good,\n
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So, our inter-VLAN routing should be functioning\nnow.
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Let’s test by pinging between VLANs.
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I’ll do a ping from PC7 in VLAN10 to PC3\nin VLAN30.
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First, in real time mode I’ll test the ping.
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I still get questions sometimes about why\n
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PC7 needs to ARP for the MAC address of its\n
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Now let’s go into simulation mode to make\n
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Okay, notice that the ping goes to SW2, and\n
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That’s because SW2 routed it from the VLAN10\n
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Okay, let’s return to realtime mode.
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Finally, just to test if our default route\n
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Note that I already configured static routes\n
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have to configure anything else.
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Okay, so the ping to the Internet works as well.
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Okay let's move on to today's NetSim lab preview.
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The lab I've chosen for today is InterVLAN\n
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The network topology is the same as last time.
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One router, two switches, four PCs, but instead\n
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So, there are three lab tasks today.
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Task 1, verify and correct workstation configurations.
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Task 2, verify and correct switch configurations.
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And task 3 is router configurations.
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So, I think for today's preview we'll do task\n1 and task 2.
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A user has reported that PC3 is unable to\n
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devices that reside on the same VLAN as PC3,\nwhich is VLAN10.
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Okay, so it looks like the devices in VLAN10\nare PC1 and PC3.
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And then there's some more explanation.
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All steps in this task should be performed\non PC3.
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Verify the problem by attempting to ping every\n
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Okay, I won't ping every address but let's\ngo on PC3.
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And let's ping the default gateway, which\n
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How about PC1 in the same VLAN?
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So, all the pings are failing as expected.
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Step 2, according to the network documentation\n
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Verify the IP address configuration.
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Okay, so here is the correct configuration\nfor PC3.
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Let's see what the actual current configuration\nis.
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Subnet mask should be /25, ending in .128,\n
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The default gateway is correct, however.
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Okay, so the IP configuration is not correct.
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Correct any IP address configuration problems\nyou find.
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So, the way to set the IP address for a PC\n
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Note that this is just for PCs in NetSim.
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IPCONFIG /IP (ip-address) (subnet-mask).
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Okay, 192.168.100.3, and then the /25 prefix\nlength.
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And let's confirm our configuration.
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Attempt to ping every other IP address on\nthe network.
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Okay, let's do some more pings.
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And we'll do one in VLAN12, PC2.
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I'm using Ctrl-C to stop these pings, by the\nway.
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Okay, so we corrected IP address configuration,\n
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After verifying PC3's configuration in the\n
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other devices on the network to determine\n
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List two or more causes of inter-VLAN routing\n
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Okay, so this is something I really like about\nNetSim.
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It really tests your understanding by asking\n
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So, what are two possible problems?
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Okay, one could be..perhaps the PC is in the\n
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Maybe it's in VLAN12 or a totally different\nVLAN.
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So, that's one possible cause.
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How about...this is probably a trunk connection\n
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You might have forgotten the SWITCHPORT MODE\nTRUNK command.
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Or perhaps the correct VLANs are not allowed.
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So maybe VLAN10 is not allowed on this trunk,\n
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Okay, so those are two possible causes.
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According to the network documentation, PC1\n
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From PC1 and PC3, attempt to ping each subinterface\non Router1.
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What can you surmise from the results of these\npings?
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Well, we already tried the ping but I'll just\n
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This subinterface cannot be pinged from PC3.
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Did it say both subinterfaces?
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Yes, each subinterface on Router1, okay.
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So the subinterface for VLAN12 should not\nwork also.
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Now let's try from PC1, also in VLAN10.
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How about the other subinterface?
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Okay, so PC3 cannot ping either subinterface.
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So what can you surmise from that?
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Well, I'd say the problem is either on Switch2\n
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because Switch1 seems to be able to route\n
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Or, Switch1 doesn't do the routing, but Router\n
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But PC1 can ping through Switch1 to Router1.
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PC3 cannot though, so there's either a problem\n
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on this trunk connection here.
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Okay next one, on Switch1, display VLAN information.
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What ports are operating in the same VLAN\nas PC1 and PC3?
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SHOW VLAN BRIEF is the command we want.
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Only FastEthernet0/3, which I believe was\nPC1's VLAN, yes.
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So this configuration seems fine.
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Yeah, so the answer is FastEthernet0/3.
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On Switch1, display interface trunk information.
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Which VLAN is the native VLAN and which ports\nare trunk ports?
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Okay, so as expected FastEthernet0/1 and 0/2\n
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Okay, and then go to Switch2, okay.
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Okay, so no ports are in VLAN10.
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FastEthernet0/3 and 0/4 are both in VLAN12.
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Okay, so let's go to number 6.
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Based on the topology and IP address configurations,\n
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That is probably FastEthernet0/3.
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Yes, it is, so here is an issue.
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PC3 in VLAN10, or should be in VLAN10.
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But it is currently configured in VLAN12,\n
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So I think we're gonna have to change that.
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What mode is Switch2's FastEthernet0/3 port\nin?
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Okay, so this is a command that I haven't\nshowed you yet.
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SHOW INTERFACES F0/3 SWITCHPORT.
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I don't think I've showed you it yet.
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Administrative and operational mode are both\n
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It's been configured with the command 'SWITCHPORT\nMODE ACCESS'.
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So, that's the answer to number 7, access\nmode.
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Number 8, correct the VLAN configuration.
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It should be in VLAN10, so SWITCHPORT ACCESS\nVLAN 10.
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And then number 9 is verify the new VLAN configuration.
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Next, number 10, on Switch2 display interface\ntrunk information.
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So, FastEthernet0/1 is a trunk.
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Native VLAN is 1, same as Switch1.
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And I didn't point this out on Switch1, but\n
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The allowed and active VLANs are 1, 10, and\n12.
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So the trunk configuration here actually looks\n
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Okay next, from PC3 do some more pings again.
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Do all the pings succeed now?
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So looks like that VLAN issue was the main\nproblem.
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How about PC1, in the same VLAN?
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Okay, PC4 doesn't work either.
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Okay, so there is definitely an issue there.
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From PC2, attempt to ping every other device\nin the topology.
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Okay, PC2 is in VLAN12, connected to Switch1.
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First, ping its default gateway.
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Okay, PC2 cannot even reach its default gateway.
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How about PC4 in the same VLAN?
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So it can ping the other PC in the same VLAN,\n
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It shouldn't be able to reach them because\n
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Yep, as expected it doesn't work.
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Okay, so clearly we still have an issue here.
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So PC3 seems to be operating fine.
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But PC2 can ping PC4 in the same VLAN, but\n
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the subinterface here on Router1.
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So clearly an issue still remains in the network.
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So, I think we will solve those issues here\nin task 3.
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But I'll leave it here for today.
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If you want to pick up a copy of NetSim for\n
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I highly recommend it, it's great additional\n
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there are plenty of labs from network fundamentals,\n
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This'll give you all the practice you need\n
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So again, please follow the link in the description\n
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Please subscribe to the channel, like the\n
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with anyone else studying for the CCNA.
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If you want to leave a tip, check the links\nin the description.
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I'm also a Brave verified publisher and accept\n
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