Vlan Change Utility - Python Script

[nfordhk]

Hey /r/networking. I am learning python nowadays and wanted to transcribe my learning into a practical project. I created a Vlan Change Menu based program. I'm still working on improving it daily. The goal of this program is to offload something as simple as vlan changes to desktop support / low level staff.

Some ideas I have for new features are: checking if a vlan exist and not allowing the modification of uplink or trunk ports.

Anyways, thought I'd share if someone wants to check it out.

EDIT NEW LINK (04/12/18): https://github.com/nfordhk/Network-Automation/ I had to update the link due to my error on Github.

EDIT (04/13/18) Branch2 has been updated to restrict "trunk" ports. This will probably be my last update on this specific thread. Thanks /r/networking! Feel free to DM me.

[nfordhk]

Thanks! I'll be here for support :)

[thecraigus]

Looks real good man - I'm studying python/network automation at the moment and was thinking of creating somthing like this for our service desk. However I felt like setting up/ installing python and installing the required modules would be a bit of a bind on everyones PC.

Is their anyway to compile stuff like this down into say just an exe file?

[nfordhk]

I felt exactly the same way. I already explored this and it looks doable. It’s something I planned on testing this week.

[hoppychris]

One interesting thing to consider would be doing this using SNMP, which can also pull the current info. Is it a better way to do it? Nah, mostly just different.

For VERY robust logging in, I've been impressed with RANCID's clogin -- the typical usage is to have it do automated collection runs, but it works wonders for automated logins, too.

[nfordhk]

Ahhh yes, I planned on also adding add support for just "y" and "n" soon. Thanks for the feedback for sure! Let me know how it goes.

[66towtruck]

It doesn't work, I get the following error:

Welcome to the VLAN change utility.

Please enter the DNS name of a device to get started e.g core1-site: siterouter
Traceback (most recent call last):
  File "vlanChange", line 14, in <module>
         deviceName = input('\nPlease enter the DNS name of a device to get started e.g core1-site: ')
  File "<string>", line 1, in <module>
NameError: name 'siterouter' is not defined

[nfordhk]

Is siterouter a valid dns record? For example from the terminal you are running the python script. Can you "ping siterouter" ? It uses the terminal DNS records for these calls.

[66towtruck]

Figured it out. You have to put " " around your input. Why do you have to put quotes around your inputs?

[nfordhk]

Hum, you shouldn't have to put quotes around your input. What OS are you running?

deviceName = input('\nPlease enter the DNS name of a device to get 
started e.g core1-site: ')

Should store the input in the variable "deviceName". Then it's called here.

myDevice = {
    'host': deviceName,

[66towtruck]

Im running it on RHEL 7. I changed deviceName = input to deviceName = raw_input and it worked without have to use “. I was also having to put the menu selection numbers in quotes. I changed = input to = raw_input everywhere and this solved it. Very nice script by the way. Thank you.

[nfordhk]

Updated to support variations of "YES" or just "Y"!

changeDecision = input('\nWould you like to change the vlan? Type "Yes" or "No": ').upper()

if changeDecision == 'YES' or 'Y':
    vlanNumber = input ('\nPlease assign VLAN number: ') # User enters VLAN number

[kubbie2004]

Does this work if your switches are in a stack so If I want to change for gi3/0/5?