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In the previous video, we already configure
ospf on 2 router.

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Next in this video, we are going to add 1 new router to the topology.

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Let’s just start, import 1 new router, let’s
say the name is Router 3, let’s also import new pc.

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Next, we need to connecting router 2 and router 3,
but before that,

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we need to add new interface on router 2.

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Let’s save the configuration, go to physical,
shutdown the router, add new interface,

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and then turn on the router again.

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Now let’s connecting router 2 and router 3.

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And also connecting router 3 and pc 3.

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Next, for ip addressing, here the ip address
will be 10.20.20.1, but here let’s use prefix /30.

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For router 3, the ip address will be 10.20.20.2/30,
and router 3 that connected to pc 3,

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the ip address will be 192.168.3.1/24.

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Okay now let’s start the ip address configuration,
let’s start with router 2, enable,

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configure terminal, here the ip address of fa1/0 will
be 10.20.20.1/30,

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So here interface fa1/0, no shutdown, and
then the ip address is 10.20.20.1

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and for prefix /30, the subnetmask is 255.255.255.252.

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We have done on router 2, next let’s configure
router 3, no, enable, configure terminal,

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let’s configure fa0/0 first, so interface fa0/0,
no shutdown, and then the ip address is 10.20.20.2

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255.255.255.252.

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Next for fa0/1, the ip address will be 192.168.3.1/24,
so here interface fa0/1, no shutdown,

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ip address 192.168.3.1 255.255.255.0.

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Okay now we have done configuring ip address
on router 2 and router 3.

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Last, let’s configure the ip address of pc 3.

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The ip address is 192.168.3.2 and the gateway
is 192.168.3.1

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Okay, so now we have done add 1 new router
to the topology.

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I think enough for this video.

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In the next video we are going to configure ospf so pc 1, pc 2, and pc 3 will able to communicate each others.

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Thankyou for watching and see you on the next
video.