Original subtitles

Now that we've configured ether channel on the call switches we need to configure layer three interfaces

on the call switches and enable into VLAN routing.

Call 1 is going to be configured with IP addresses 10 dot 1 dot 1 2 5 1 in VLAN 1 and call 2 with IP

address 10 dot one that 1 to 2 5 2 and then something similar will be configured on all of the other

v lands on both switches so he has call 1 to enable into VLAN routing.

We need to use the common IP routing now before I type that command.

Notice the output of show ip route.

It shows us that a default gateway is not set.

That means that IP routing is not enabled on the switch as soon as I enable IP routing the show IP right

command shows us a very different output.

We see something like this instead of what we saw previously.

So one of the first things you need to do on a layer 3 switch is enable IP routing IP routing is not

enabled on most switches by default.

So you need to enable that first and then what we can do is configure IP addresses on what are called

the switched virtual interfaces or SVR eyes so the command VLAN 1 or VLAN 10 would create a villain

in the villain database but the command interface VLAN 1 creates a switched a virtual interface or a

layer 3 interface.

And notice the difference.

Now when I use the command show IP right we don't see that route in the writing table.

But notice what happens when I know shutter the interface.

Show IP right shows us that right in the IP routing table.

As soon as I create another switch to a virtual interface let's say for VLAN 10 and give the switch

an IP address in that villain that network becomes available in the IP routing table.

These switched off virtual interfaces or S V I's all layer 3 interfaces for specific v lands on the

layer 3 switch.

So this is the layer 3 interface for VLAN 10.

This is the layer 3 interface for VLAN 1 and I would do something similar for Vigeland 20 tendered 1

or 20 2 2 5 1

interface V Line 30 IP address 10 1 3 2 5 1 Notice the difference of villain 1 was shut down by default

but these SFE I's come up by default in the real world

verify the state of your SVR eyes by using the command show IP interface brief make sure that these

interfaces are up on your switch to show IP right now.

Notice the interfaces are shown in the IP running table and I should as an example be able to ping my

local IP addresses these VLAN one v lan 10 v land 20 30 and 100.

So that looks good.

We need to do something similar on the switch.

So just to show you the point again.

Show IP it shows nothing in the IP routing table at the moment this command and output shows us that

IP routing is enabled.

Notice we see this rather than this to show IP rot here shows us ICMP redirect caches empty.

If you see that output it means that IP routing is disabled IP routing shows us if we have lost result

and you see all of these codes that means IP routing is enabled on the switch.

No routes are currently in the writing table by default VLAN 1 is shut down.

We can see that by using the command show IP interface brief and in this case I'm going to use do because

I mean config interface mode.

Notice villain one is down administratively down I need to know shut the interface to bring it up.

So if we do the show IP interface brief command again.

Notice the interface is now up as soon as I use the come on IP address tendered 1 1 2 2 5 1 on this

case 2 5 2 and now use the command.

Do show IP round we can see that round in the IP routing table.

So let's create additional SFE eyes V Line 10 IP address tendered 1 10 0 2 5 1.

Or should I say 2 5 2 VLAN 20.

This will be 20 2 5 2 VLAN 30.

This will be 30 2 5 2 and then interface feel and 100 IP address 10 1 100 2 5 2 with Slash 24 mosque

always verify what you've done so show IP interface brief make sure that you have done what you think

you've done.

I like the following saying a Cisco device does it to what you tell it to do not what you think it should

do.

It will only do what you tell it to do through the commands that you've typed through the sea a lie.

Sometimes we think we've done something when we haven't.

So make sure that you verify your configuration.

As an example can we paying ourselves on VLAN 1.

Yes we can.

What about call 1.

Yes we can.

On VLAN 1.

So let's test it this way.

Can call 1 ping core 2 on villain 1 Yes it can.

What about a V Line 10.

Yes it can.

Vigeland 20 yes it can.

30 that's good.

One hundred.

That's good.

So we've configured IP addresses on the two core switches per our instructions and we've configured

into VLAN routing the command IP routing enables into VLAN routing on layer 3 switches and interface

VLAN and a number such as one creates the XVI on the switch allowing us to configure IP addresses the

next step is to configure IP addresses on our access switches.