Setup GNS3 Automation Network in OSX

I have been working to learn how to use Python to automate interactions with network devices.  Due to what I have in my lab and the fact that we have GNS to model Cisco Networks I started with IOS.  In order to really test out the automation scripts I have been building, I felt it was necessary to run them against at least ten devices to make sure they would scale out and recover well from errors.  In order to do that I had to build out a 10 device lab.  This is how I did it. Read more

NAT Store: The books you read and the stuff you use.

One of the lines that I have taken to heart in Life is  “your only difference between now and ten years from now will be the books you read and the people you meet”.  I read it years ago and since then I have doubled down on my reading.  Prior to this I was reading lots of fiction and technical documents around doing my jobs as a network engineer.  Since then I have expanded into Finance, Marketing, Strategy and more.  I can’t begin to tell you the difference in my life it made.  While I won’t go into details actions I took as a direct result of what I was reading helped me go from a mid five figure salary to a solid six figure salary and on a pace that made me part of the businesses I was with not just an employee. Read more

What did you Expect? Part 2: Working with VLANS

So we started off in Part 1 breaking down what a basic SSH connection and authentication looks like using Python and Expect.  To add some context to this I am using the pexpect library for Python.  This library falls back on system level tools like the the SSH client inside OSX or Linux.  I can’t speak to how this works with Windows so just be aware of that as we move forward.  In the long term I will start adding more complexity such as the ParaMiko and NetMiko libraries that use integrated SSH clients but for now I want to keep this as simple as possible so both you and I can get the most value out of these posts. Read more