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In the previous video, we already build two
topology like this.

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So here we have room number 1 which using the
first block subnet, and we also have room

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number 2 which using second block subnet.

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Now in this video, we are going to learn how
to connecting this two rooms.

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To connecting different block subnet like
this, we will need a router.

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Okay let’s just start.

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Let’s import a router to our topology, go
to network devices, and here we have router.

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In this case, I will use router 2811.

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Next let’s connecting this two switch to
the router.

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Actually, each interface in the router or
switch must be have a name.

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In the real device, we will see the name of
the interface in the top of interface.

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Let’s say fa0/1, fa0/2 and others.

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In the cisco packet tracer, by default the
name of the interface is not shown like this.

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To show the name of the interface, we can
go to cisco packet tracer and then preference.

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Remember that if you use windows, the preference
menu is under edit.

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Next here we can mark “Always show port
labels in logical workspace”.

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Okay now we can see here that each interface
have a name.

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So the router interface that connected to
switch 1 is fa0/0, and interface that connected

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to the switch  2 is fa0/1.

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Okay next we need to configure so all pc in
the room number 1 can communicate with all

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pc in the room number 2.

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To do that we need to configure ip address
on the router.

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We will use first block subnet in fa0/0, why?

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Because fa0/0 is connected to the room number
1 and room number 1 is using first block subnet.

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And then we will configure fa0/1 with second
block subnet.

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In this case, I will use the last ip address
of first block subnet for fa0/0, which is

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30, remember that 31 Is broadcast address,
so we can not use 31.

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Okay let’s open the router, go to config
menu, and here we can see fa0/0.

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Here we need to change the interface status
to on.

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If you see here, the color of interface is
red, but after we change the status to on,

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the color now is green.

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Next let’s configure the ip address, here
we will use the last address from first block

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subnet, which is 10.10.10.30, and then the
subnetmask is 255.255.255.224.

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Okay we have done for fa0/0, now let’s move
to fa0/1.

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Here we will use the ip address from second
block subnet, in this case we will also use

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the last address.

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Which is 62, remember that we can not use
63, because this is broadcast address.

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Okay here let’s change the status of interface
to on.

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And then configure the ip address, 10.10.10.62
and the subnetmask is 255.255.255.224.

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Okay now we have done configuring the ip address
of the router.

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Next we need to configure default gateway
on all pc. The gateway will be the ip address

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of router.

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For all pc in the room number 1, the gateway
will be the ip address of fa0/0, which is

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10.10.10.30, and the gateway for all pc in
the room number 2 will be the ip address of

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fa0/1, which is 10.10.10.62.

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Let’s configure gateway for all pc in the
room number 1 first.

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The gateway is 10.10.10.30

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Okay we have done configuring gateway on all
pc in the room number 1, now let’s configure

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the gateway on all pc in the room number 2,
the gateway is 10.10.10.62.

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Okay we have done.

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Finally let’s test connection between room
number 1 to room number 2, let’s test from

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pc 4 to pc 5.

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The first test usually failed like this.

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Let’s try again, okay here we can see that
ping from pc 4 to pc 5 is successful,

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this is mean that connection between room number 1
and number 2 is ok!

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To make sure, let’s try again from pc 2 to pc 6.

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Okay the first test is failed, let’s try
again.

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Here we can see that success.

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Okay let’s just test again from room number
1 to room number 2.

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Okay here we can see that this is also success.

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So now we are successfully connecting room
number 1 with room number 2 using a router.

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I hope you understand about how switch and
router work.

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The summary is, switch is used to connecting
many pc that in the same block subnet,

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and router is used to connecting many pc that
in the different block subnet.

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Okay I think enough for this video

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Thankyou for watching and see you on the next video!