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In the previous video, we already do nested
looping, so we have looping inside looping,

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the first looping is to looping on all router,
and then for each router, we do looping to

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configure multiple loopback interface.

4

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But this script actually is not best practice.

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For now, the ip address of all router is similar,
the first 3 number is same, and the last number

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is in sequence.

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The problem is, if the ip address of all router
is totally different.

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So we can not looping like this.

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The best way to configure multiple router
at once is using a list, so we save the ip

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address of all router in the list, and then
we can do looping to the list.

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Let’s just try it, copy this script.

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Create new file, let’s say the name is netmiko_looping_list.py.

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Paste the script.

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Now let’s create the list to save the ip
address of all router,

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List_ip, and then let’s define the ip address
of all router, 10.10.10.1, 10.10.10.2, 10.10.10.3,

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this is to long, so we can enter here.

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And then 10.10.10.4, and last 10.10.10.5.

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Now we can do looping in the list, let’s
say for ip in list_ip,

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For the host, we can just use the ip variable.

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Here we will connect to each router, let’s
just remove the list config, so we will not

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configure anything, we will just only show
the interface.

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Okay we have done here, save, back to the
ubuntu server, ls, here we can see that we

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have netmiko_looping_list.py, let’s execute
this.

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Router 1 success, router 2 success, rotuer 3
success, router 4 success, and router 5 is also succes.

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So now we are success to remote multiple router
at once using list.

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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.