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In the previous video, we already learn how
to configure multiple router at once,

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which is we configure interface loopback0 on router 1
until router 5.

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But the problem is, we still need to check
the interface on each router one by one.

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Now in this video, we are going to create
a network automation script to check the interface

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on all router at once.

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This is easy, here after configuring ip address,
we can type a command to show interface,

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so here show ip interface brief exclude unassign.

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Don’t forget to use \n or enter here.

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Let’s also print a divider here, so the
output will be good.

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And for the loopback, let’s try to create
loopback1, and the ip address let’s say

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10.2.1.x. Here we also need to use time sleep.

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Save, back to terminal,

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Let’s execute the script.

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Just enter enter here.

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Here we can see that we get an error.

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Invalid input detected.

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Why this is error?

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Because now we are in the configuration mode,
so we need to use do.

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Let’s add do here, and then let’s say
we will create loopback 2, and the ip address is 3.

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Save, back to terminal, and then let’s execute
the script again.

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Just enter enter here.

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Okay this is success.

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We are success to configure loopback2 with
ip address 10.3.1.1 on router 1,

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and here we can see that we already have loopback0 until
loopback2 on router  1.

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Router 2, we also have loopback0 until loopback2,
the ip address is correct

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Router 3, we also have loopback0 until 2, the
ip address is correct.

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Router 5 is also correct.

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Okay so now we are success to doing looping
to show interface on all router.

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I think enough for this video

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Thank you for watching and see you on the next video.