1
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So let's iterate our script and get it to do something else.

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Here's a new version of the script and I've made some changes.

3
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We don't need this sort of removed that from the script that says Enter your remote account.

4
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I've changed that back to enter your telnet username because that makes more sense.

5
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This is the same as before.

6
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We asking the user for a password and we opening up a file called my switches for each IP address in

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the file.

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We're going to strip any spaces and then we're going to print a get a running config from switch.

9
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So I've made a slight change here.

10
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Rather than making changes to the VLAN database of the switches.

11
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I'm going to use the command terminal length zero and show run to show the running configuration of

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the switches.

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So I've added a print statement here so that we know that the script is getting the running configuration

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from a switch.

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Was this IP address?

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So rather than saying configuring switch, it's now going to say getting running config from the switch.

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The rest of the code is very similar.

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So telnet into the switch.

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And a logging in is the same as the previous script, but we're not going to type confetti.

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We simply going to type terminal length zero and show run.

21
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The reason for doing that.

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Is when you telnet to a switch and you type show run by default.

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We only getting 24 lines of output and I have to press spacebar.

24
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To show each page of output.

25
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So show.

26
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Run.

27
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Press spacebar.

28
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Press spacebar again and so forth to see the rest of the configuration.

29
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And I need to do that multiple times to view the entire running configuration.

30
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So rather than doing that, I'm going to type terminal length, zero show run and that will show us

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the entire running configuration in one go.

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It's all set to the length back to 24 of the default.

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But when the script telnet to the switch, it's going to type terminal length, a zero show run, get

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the entire running configuration and then exit out of the Telnet session.

35
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But it's not only going to do that, we're going to take the output and save that to a file.

36
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So I've got this variable called save output.

37
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We're going to open up a file called Switch, followed by the hostname, which is essentially the IP

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address of the switch.

39
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And we're going to open the file as a reader.

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Right.

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So save output.

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Right.

43
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What are we going to write?

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We're going to write the output of the Telnet session in ASCII format.

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We're going to press carriage return and close the file.

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Now we can print the output to the screen, but we don't need to do that.

47
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We'll simply save the configuration to a file.

48
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So again, we are iterating our scripts and improving them.

49
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So let's copy that script.

50
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On the network automation container.

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Let's create a file called Back Up Configs dot py.

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And I'll save that script to the file.

53
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So again, cat back up configs.

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P There's our script.

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Now, before I run the script and notice that there are no files on the network automation container.

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That have the name switch followed by IP address.

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So after the moment, we only have our Python scripts.

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But if I type Python three back up configs, specify my username and password.

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The script is now telling, heading to the individual switches and is grabbing the running configuration.

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And is saving that as files under the network automation container.

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It's now completed.

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So Liz shows us these files.

63
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So more switch and let's look at 83.

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You can see that this is the running configuration of the switch.

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Space Bar shows us the configuration of the switch.

66
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Again, we could look at another switch, let's say switch six.

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There's the running configuration of the switch.

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Now you could edit the output and get rid of this kind of output.

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I'm not doing that at the moment.

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I simply want to back up the running configuration of the switches to the network automation container.

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Notice the power of network automation.

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I'll remove all files that were backed up and then I'll simply run the script again.

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So I'm running the script and getting it to telnet to the switches and getting it to save.

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The running configurations in this directory.

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Liz shows us the running configurations.

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So again, more switch.

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Let's look at 72.

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There's the configuration of switch one with IP address 1921681 2272.

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We could look at A2.

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There's the configuration of that switch.

81
00:06:42,310 --> 00:06:49,900
So it's not very difficult to use Python to back up the configurations of your network devices.

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The script is only 27 lines in length.

83
00:06:55,810 --> 00:07:00,010
It's a very short script but does something very useful.

84
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It telnet to network devices and retrieves the running configuration of those network devices.