1
00:00:00,490 --> 00:00:00,820
Now.

2
00:00:00,820 --> 00:00:02,830
Previously we created a script.

3
00:00:02,860 --> 00:00:05,230
Python 32. p y.

4
00:00:06,490 --> 00:00:15,250
If I look at the contents of that file, we can see that the network automation container telnet to

5
00:00:15,250 --> 00:00:19,270
a switch that's hardcoded in the script.

6
00:00:20,000 --> 00:00:24,380
And then creates some VLANs on that switch.

7
00:00:26,110 --> 00:00:35,050
So using this as our basis, let's now extend the script to use a file of IP addresses.

8
00:00:35,290 --> 00:00:45,550
So rather than hard coding an IP address in the script, let's open a file called My Switches.

9
00:00:46,340 --> 00:00:51,560
What you'll notice is the script is very similar to what we created previously.

10
00:00:53,310 --> 00:00:55,260
This code is essentially the same.

11
00:00:55,470 --> 00:01:03,000
Except here we've got a hardcoded IP address here have simply left host equal to local host and notice

12
00:01:03,000 --> 00:01:11,040
at a line eight we change things because we're going to open up a file called my switches and only later

13
00:01:11,040 --> 00:01:14,160
are we going to telnet to the device.

14
00:01:15,440 --> 00:01:18,770
Unlike what we did in our original script.

15
00:01:19,580 --> 00:01:27,440
The reason for doing this is we want to open up a file called My Switches, and then for each line or

16
00:01:27,440 --> 00:01:36,110
entry in that file we going to telnet to the switch and create the relevant VLANs.

17
00:01:36,770 --> 00:01:44,570
So rather than only telnet into an individual switch and making changes on that individual switch,

18
00:01:44,570 --> 00:01:48,980
we're going to telnet to multiple switches and make changes on them.

19
00:01:50,800 --> 00:01:55,210
So the first thing we need to do is create a file called My Switches.

20
00:01:56,330 --> 00:02:02,000
You could call this anything, but that's the name of the file in my script.

21
00:02:03,690 --> 00:02:07,590
What this is going to contain is a list of IP addresses.

22
00:02:08,009 --> 00:02:10,410
So I'll copy and paste that a few times.

23
00:02:12,350 --> 00:02:22,790
This is simply the IP addresses of devices that we want to make changes to or changes on, make sure

24
00:02:22,790 --> 00:02:24,410
that you don't have any spaces.

25
00:02:25,440 --> 00:02:30,030
Later on, I'll show you how to strip lines in spaces.

26
00:02:30,090 --> 00:02:37,170
But for now, try and remove all of the additional spaces and carriage returns in your file.

27
00:02:38,880 --> 00:02:40,210
I'll save that file.

28
00:02:40,230 --> 00:02:41,760
So, Kat, my switches.

29
00:02:41,910 --> 00:02:43,950
That's what my switches looks like.

30
00:02:45,300 --> 00:02:48,480
Let's create another test.

31
00:02:48,480 --> 00:02:50,190
Python script.

32
00:02:50,580 --> 00:02:53,550
So Python file p y.

33
00:02:54,500 --> 00:02:56,240
Let's copy this entry.

34
00:02:56,270 --> 00:02:57,950
This opens a file.

35
00:02:58,220 --> 00:03:03,140
So we're going to open up my switches, and then we're going to do something.

36
00:03:03,960 --> 00:03:09,750
I'm going to say four IP address in F so for each a line in the script.

37
00:03:12,030 --> 00:03:13,140
Four spaces.

38
00:03:14,130 --> 00:03:17,700
Print and lets print the IP address.

39
00:03:18,000 --> 00:03:19,770
So it's a fairly simple script.

40
00:03:20,490 --> 00:03:30,930
All it's going to do is open up a file and print the lines in the file and there you go.

41
00:03:31,440 --> 00:03:36,510
Notice it's printed the entries in the my switches file.

42
00:03:38,790 --> 00:03:42,840
So again, the python filed on p script.

43
00:03:43,940 --> 00:03:47,750
Simply opens a file that you specify.

44
00:03:47,900 --> 00:03:49,940
In this case, it's my switches.

45
00:03:49,940 --> 00:03:54,770
And then for each align in the file, it prints the line.

46
00:03:55,130 --> 00:03:56,690
Now you could call this anything.

47
00:03:56,690 --> 00:03:59,170
You could call this a line as an example.

48
00:03:59,180 --> 00:04:05,000
So for each line in the file f print the line.

49
00:04:07,180 --> 00:04:08,230
And there you go.

50
00:04:08,260 --> 00:04:15,640
The result is the same, but because we have IP addresses in our file.

51
00:04:17,700 --> 00:04:19,860
I'm going to use IP.

52
00:04:23,520 --> 00:04:26,520
And again, notice the result is the same.

53
00:04:27,240 --> 00:04:31,050
So what we've got here is a script that opens a file.

54
00:04:31,290 --> 00:04:36,060
It strips any trailing spaces, so that removes an error.

55
00:04:36,060 --> 00:04:45,420
If you have an IP address of 121681 2282 space that removes or strips any spaces after the IP address.

56
00:04:45,450 --> 00:04:49,950
To ensure that we only have the IP address and not IP address space.

57
00:04:50,370 --> 00:04:56,820
The script then prints configuring and the IP address from the file.

58
00:04:57,330 --> 00:05:03,300
Now this is a little bit redundant, but I'm going to keep it in the script to keep it consistent with

59
00:05:03,300 --> 00:05:04,560
our previous scripts.

60
00:05:08,140 --> 00:05:09,700
In our previous scripts.

61
00:05:13,160 --> 00:05:16,610
We had host set to a hardcoded IP address.

62
00:05:17,280 --> 00:05:20,150
Here I have left it to the default of a local host.

63
00:05:20,750 --> 00:05:28,220
However, after this point, the host of variable is going to be replaced with the IP address of the

64
00:05:28,220 --> 00:05:29,450
switch in the file.

65
00:05:30,110 --> 00:05:34,370
This is now consistent to what we had previously in our script.

66
00:05:35,130 --> 00:05:41,550
But notice the host verbal is set to the IP address of the switch in the file.

67
00:05:42,330 --> 00:05:49,410
So what you'll notice is this is a very similar to what we have in our original script.

68
00:05:52,260 --> 00:05:58,320
And then here we are going to global configuration mode and creating our VLANs.

69
00:05:58,440 --> 00:06:06,630
We don't have to go to enable mode because when we telnet to the switches, we've configured them.

70
00:06:09,670 --> 00:06:13,150
To take us immediately to privilege mode.

71
00:06:13,180 --> 00:06:15,250
Notice I'm in privilege mode already.

72
00:06:15,820 --> 00:06:20,290
That's because the username David has.

73
00:06:21,930 --> 00:06:25,560
Level 15 privileges, as you can see there.

74
00:06:29,430 --> 00:06:32,640
So all we going to do is create some VLANs.

75
00:06:34,800 --> 00:06:37,080
And then we're going to print the results.

76
00:06:37,710 --> 00:06:39,960
Now, we'll optimize this in a moment.

77
00:06:41,150 --> 00:06:49,130
We want to improve the script by running loops within loops, but initially will start with a single

78
00:06:49,130 --> 00:06:49,670
loop.

79
00:06:50,840 --> 00:06:53,270
Configuring Individual VLANs.

80
00:06:54,250 --> 00:06:58,330
So let's create a script called Python 35. p y.

81
00:06:59,170 --> 00:07:04,960
I'll paste that script into the network automation container and save the script.

82
00:07:05,350 --> 00:07:09,610
So again, more Python 35. p y.

83
00:07:10,450 --> 00:07:13,270
That's the script that we've just copied.

84
00:07:14,170 --> 00:07:16,150
Before I run the script.

85
00:07:17,080 --> 00:07:24,130
Notice that switch to only has the default VLANs.

86
00:07:25,740 --> 00:07:27,960
I'll do a debug telnet on the switch.

87
00:07:29,750 --> 00:07:37,850
So we can see connections to the switch on switch for show vlan brief.

88
00:07:38,300 --> 00:07:41,210
We only have the default vlans.

89
00:07:41,810 --> 00:07:47,180
Now you could do something similar on all the other switches, but I'm not going to do that.

90
00:07:47,210 --> 00:07:48,800
They all are the same.

91
00:07:49,310 --> 00:07:51,830
Show vlan brief on switch six.

92
00:07:51,950 --> 00:07:55,580
Notice only has the default vlans.

93
00:07:56,030 --> 00:07:58,160
Switch one has more vlans.

94
00:07:58,160 --> 00:08:00,980
Because we configured those vlans previously.

95
00:08:01,190 --> 00:08:05,720
So show vlan brief shows us that we have a lot of vlans on the switch.

96
00:08:06,500 --> 00:08:09,800
So I'm going to say no vlan one two, 100.

97
00:08:12,200 --> 00:08:15,530
And I should say too because vlan one cannot be deleted.

98
00:08:15,650 --> 00:08:17,480
So show vlan brief.

99
00:08:18,270 --> 00:08:21,600
We now only have the default VLANs.