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OK so let's see if we can configure this topology.
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I'm going to start off by configuring the call 36 50 switch.
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So this is a multilayer switch
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which means that we need to configure multiple IP addresses on the switch and enable IP routing between
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the villains so the first thing I'm going to do is create the V lines V Line 10 V Line 20 veal and 30
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and V Line 100.
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So show v lan should show us the V lands and there you go
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we'll make this a bit bigger.
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So again show v LAN and I'll use brief here.
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Here's the command.
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We can see that all interfaces are currently in the default villain.
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We've got a v lines 10 20 30 in 100 configured but no interfaces are in those v lands.
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So interface gigabit 1 0 20 this is the interface where our server is now a good check to use is to
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show IP interface brief and verify that the interface is up.
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That helps you check whether you're working on the right interface in your lab.
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This interface is up up.
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So that's a good sign.
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So going to top search port mode access switch port access vlan 100 show interface gig 1 0 20 switch
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port.
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This will allow us to check that our configuration is correct on the interface.
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So there's the show command this interface is enabled as a layer to port we're using static access it's
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operating as a static access port.
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In other words it's an access port and not a trunk port.
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The villain used is vlan 100.
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So that looks good.
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So I now need to configure the other interfaces so before I do that show IP interface brief we can see
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that these interfaces gigabit 1 0 1 1 0 2 and 1 0 3 are currently up show run shows us that after the
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moment no configuration has been applied on the interfaces now these ports gigabit 1 0 1 1 0 2 and 1
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0 3.
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Need to be configured as trunk ports down to the switches so interface gigabit 1 0 1 switch port mode.
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Trunk.
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Notice you may get an error in the real world or on your switch depending what it is.
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You may have to specify the encapsulation as dot one Q Before you specify switch port mode.
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Trunk that often depends on the switch.
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So you may need to set the encapsulation and then you can specify the motors trunk.
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So going to do that on all three ports encapsulation is not one key mode is gonna be trunk.
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Now show run shows us what we've done.
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Notice each port is configured to use Ed one key and to use trunk King.
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That's correct because we've been told to configure ports between switches as trunks.
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That's also best practice in a layered to infrastructure so to prove that we could tap show interface
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gigabit 1 0 1 switch port.
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Notice on gigabit.
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1 0 1.
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There's the show command on this port.
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It's administratively configured as a trunk.
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It's operating as a trunk encapsulation used is a dot one key native vlan is VLAN 1 which is correct.
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So what we've done thus far is configure the three ports to the access switches as trunk ports we've
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configured the port to the server as a access port in vlan 100.
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The next thing we need to do is configure switched virtual interfaces or SFE eyes to enable into VLAN
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routing VLAN 1 is the default villain it's currently down so I need to enable that and I need to configure
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the switch with IP address 10 dot one dot 1 2 5 4 slash 24 mask per hour instructions the other SVM
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eyes or switch virtual interfaces are gonna have these IP addresses so interface VLAN 10 IP address
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10 dot wonder tender to 5 4 slash 24 mask no shut interface VLAN 20 IP address tendered 1 to twenty
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two five four no shut now the interfaces are coming up but from experience I always no shut the interface
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there's going to be no harm in doing that if it's already up that's great but if it's down we are ensuring
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that the interface comes up
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so there's no problem doing that just to be sure
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interface VLAN one hundred ten one one hundred two four for it's nice 24 mask no shutter the interface
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okay so show IP interface brief notice we have interfaces up noticed my mistake I configured VLAN 40
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that's not required and notice the SVR is down because no interface is configured in that V LAN and
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that a villain doesn't exist in the villain database so going to remove that XVI
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so interface VLAN 40 is removed.
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Show villains shows us that VLAN 40 is not in the villain database.
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So again if I created interface of Ilan 40 no shut to that show IP interface brief would show me that
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the interface is down because of that VLAN doesn't exist in the veal and database you've got to have
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the veal end and the veal and database for the switched virtual interface to come up so again I'll remove
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that no interface VLAN forty okay.
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One thing we still need to do on the call switch is enable IP routing IP routing is not enabled by default
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we've got to enable IP routing to allow the switch to round from one XVI to another so as soon as you
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start creating multiple SFE eyes and the switch is gonna be your layer three switch all the switch that
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does the interview and routing you must enable IP riding on that switch.
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Okay so at this point I want to save the configuration of the switch let's configure the access switches
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and then we'll be able to test whether the core switch is configured properly.
7876
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