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In the previous video, we already
learn how to looping in the list,

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so here we have the list of ip address of all
router, and then we do looping to the list.

3

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But we only configure 1 interface on each router.

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Now in this video, we are going to configure
multiple interface in all router at once.

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So we will have 2 looping. The first
looping is looping to all router,

6

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and then for each router, we will do
looping again to create multiple interface.

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We usually called this method as nested
looping, so we have looping inside looping.

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Okay let’s just start, copy
this script, create new file,

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let’s say the name is paramiko_looping_nested.py,

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And then paste the script here.

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So here we already have the
list ip address of all router,

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and then here we already looping to the list_ip,

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Next here, let’s add script to
configure let’s say loopback 6 until 8.

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Here we already have loopback5, so
we will create loopback6 until 8.

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Let’s looping here, for x in
range , x is just a variable,

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you are free to use anything. And then range

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6 until 9. Because we want to create interface
loopback 6 until 8, so we do looping from 6 to 9.

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Now let’s put this script inside looping,

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we just need to do write one time each router, so
we don’t need to put this script inside looping.

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We also just need to configure terminal one time,
so this is also will be outside the looping.

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Next, here for the loopback number,

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let’s change this to x, so here we need to
use f string, and then change this to x.

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For the ip address, this is the
number of loopback increment by 1,

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when we create loopback5, the number is 6,
when we create loopback4, the number is 5,

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So here we can change this become x + 1. So when
we create loopback 6, the number will be 7.

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When we create loopback7, the number will be 8, and
when we create loopback8, the number will be 9.

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For the last number will be still the router_id,

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Okay done here, save, let’s back to the
terminal, ls, here we can see that we

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have paramiko_looping_nested. Let’s
execute this. Just enter enter here.

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Okay success login to router 1, and we are
success to create loopback 6 until 8 in router 1,

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Router 2 also successs, router 3 success,
router 4 success, and router 5 also success.

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Okay so now we are success to do nested
looping, which is looping inside looping.

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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.