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In the previous video, we already learn how
to doing network automation using paramiko.

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But the case is still very simple, which
is to create only 1 loopback interface.

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Now in this video, we are going to
do more complex network automation.

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Let’s say we want to create some interface
loopback at once. Let’s just start.

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Create a new file,

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let’s say the name is paramiko_looping.py.

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I will copy paste the script
from the paramiko_basic.py,

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and then later we will edit this.

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Okay now let’s edit this script
to create some interface at once.

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Let’s say we will create
interface loopback 4 until 6.

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To do that, we will use looping, for n, this n is
just a variable, you can use anything you want,

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in range 4 until 7, if we looping between 4
until 7 like this, the result will be 4 until 6.

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Let’s try it on python interpreter first. Here
let’s type the script, for n in range 4 7,

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let’s print the n,

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Here we can see that the result is
4 until 6. So here 7 minus by 1.

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If we type the looping between 4 until
6, the result will be only until 5.

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Let’s try it, for n in range 4 6

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Here we can see that the result is only until 5,

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so if we want to create loopback 4 until
6, we need to looping on 4 until 7.

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Here we need to have indentation we can block
the script and then tab in the keyboard.

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For the interface name, let’s change it using n,
because we want the name of interface is loopback4

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loopback5 and loopback 6, so we
need to change this 3 become n.

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We can use f string, f here, and
then here let’s change become n.

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So this n will be 4 5 and 6.

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Next, for the ip address, we can see that
the ip address is increment by 1 from the

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loopback number. Loopback0, the ip address is
10.1.1.1, loopback1 the ip address is 10.1.1.2.

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loopback2 the ip address is 10.1.1.3,
and loopback3 the ip address is 10.1.1.4.

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So the last number Is the
loopback number increment by 1,

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Now we can change this become n plus by 1.

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And then here we need to use f string.
So when we create interface loopback4,

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the ip address will be 4 plus by 1, which is 5. When
we create loopback5, the ip address will be 5 plus

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by 1, which is 6. And when we create loopback6,
the ip address will be 6 plus by 1, which is 7.

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Okay we have done here, we using indentation here,

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so this script will be looping, but
the output script is outside looping.

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Because we want to execute print
output when all configuration is done.

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And then here, configure terminal
is also outside the looping,

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because we only need to use
configure terminal command

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one time. We don’t need to type configure
terminal every time create interface loopback.

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save, let’s execute this script.

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Ls, here we can see that we have
paramiko_looping_interface.py,

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let’s execute this, python
paramiko_looping_interface.py.

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just enter enter here, okay this is success
to login to router 1, configure terminal,

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and here we are success to configure loopback 4,
the ip address is 10.1.1.5, configure loopback5,

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the ip address is 10.1.1.6, and configure
loopback6, the ip address is 10.1.1.7.

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okay this is success. Let’s check on router 1,
do show ip interface brief exclude unassign,

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here we can see that we have
interface loopback 4 until 6.

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Okay so now we are success to
create many interface at once.

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Before moving to next video,

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let’s remove all interface loopback on
router 1, so here we have loopback 0 until 6,

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let’s try to remove all of this
loopback interface, we can use looping.

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Let’s just comment this,

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to comment multiple line of code, we
can block the script, and then ctrl + /,

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Here we can see that all script is become comment.

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If we block the script again, and type ctrl +
/ again, the comment will be gone like this.

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If I type ctrl + / again, this
script will become comment again.

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And then now let’s write a script to
remove interface loopback 0 until 6,

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so for n in range 0 7, because we want to looping
until 6, so we need to write until 7 here.

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Or actually, we don’t need 0 here, so we can just
type 7. This is will be looping from 0 until 6.

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And then here no interface loopback
n. here we need to use f string.

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Don’t forget \n here for enter.
Last, let’s sleep for a half second.

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Because the configuration is very simple,
so a half second is enough. Save this.

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Let’s back to the terminal, execute the script.
Enter enter here,

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okay here we can see that we are success
to remove interface loopback 0 until 6.

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Let’s check on router 1 again, show
ip interface brief exclude unassign.

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Here we can see that we don’t
have loopback 0 until 6 anymore.

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Okay I think enough for this video,

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in the next video, we are going to learn how to
configure many router at once.

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