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Hank Preston

Principal Engineer

Learning and Certifications

Hank’s two passions are technology and theatre. Bringing them together drives him towards a borderline obsession on creating entertaining presentations, labs and demonstrations that breakdown complex technology topics for audiences. After spending several years working on and behind the scenes on stage productions, what started as a hobby turned to a profession when Hank entered the IT industry with a focus on web and database development and engineering.

Drifting from development into infrastructure engineering brought him to Cisco as a Systems Engineer, focusing on Data Center and Cloud Architecture for large enterprise customers.

And after six years as an SE, Hank has taken up the mantle of a Developer Evangelist with DevNet where he can focus full time on reminding everyone that technology can and should be fun to work with.

Hank holds a Master Degree in Information Systems as well as several certifications including CCIE R/S 38336 from Cisco.

Find Hank at:

twitter: @hfpreston

GitHub: http://github.com/hpreston

Articles

April 8, 2022

LEARNING

Learning the Skills to Build the Learning Platform

4 min read

You know that movie about dreaming within a dream within another dream? Well, that kind of inception world is what I think about whenever I take one of the Cisco Learning Courses to learn something I need to know to work on the platform that hosts those same courses. It blows my mind every time! […]

September 20, 2021

DEVELOPER

Learn to Build a Troubleshooting Assistant at DevNet Create

1 min read

Want to explore new ways to apply network automation skills to real world network operations and engineering activities? Register to attend Hank's session at DevNet Create.

May 27, 2021

DEVELOPER

Applying DevNet Associate Skills to Real World Tasks – June Webinars

3 min read

Are you a network engineer turning network automation engineer? Join the DevNet Associate Prep Program for completely FREE access to materials and webinars to take your skills to the next level.

May 6, 2021

DEVELOPER

How to Deal with Multiple Keys in a RESTCONF URL

3 min read

Do you have a question about network programming or NetDevOps? Why not "Ask Hank?" In this blog, let's try to demystify RESTCONF use for everyone.

April 22, 2021

DEVELOPER

NetBox as Inventory Source of Truth for Cisco NSO

6 min read

Both Cisco NSO and NetBox offer robust APIs and well formatted data models. See how to keep the device inventory in your Cisco NSO servers accurate based on your NetBox based Source of Truth.

February 26, 2021

DEVELOPER

How can I automate device configurations using CML2?

13 min read

Cisco Modeling Labs is a great tool for learning all aspects of networking, including automation. Hank discusses options for making the setup and management of your lab topology fast, easy, and automated.

January 19, 2021

DEVELOPER

Read-Only YANG Leaves: Where Does the Data Come From?

5 min read

DevNet's Hank Preston digs into another user's question related to model driven programmability. Do you have a question about network automation? You can Ask Hank!

January 11, 2021

DEVELOPER

Native, IETF, OpenConfig… Why so many YANG models?

5 min read

Which YANG model to use for your project? Ask Hank takes a look at your options, and how model driven programmability is a foundational technology for the automation engineer.

December 22, 2020

DEVELOPER

How can I automate a MAC address interface report?

8 min read

Hank's back to answer another question from the community. This time we use automation to associate ARP data, MAC addresses, and network interfaces.

December 17, 2020

DEVELOPER

Dear Hank… Help Me with RESTCONF URL Creation

4 min read

Got a network automation question? Ask Hank. Here, a network engineer wants to understand how the URLs for RESTCONF are constructed from the YANG models, and how to use the feature for updating IP addresses.

September 22, 2020

DEVELOPER

Tune in to the “Creators” Channel at DevNet Create

2 min read

October 13th, DevNet Create 2020 goes virtual, and goes global with three regional programs featuring use cases, showing code, and innovations relevant to your region.

October 11, 2017

DEVELOPER

Part 2: NetDevOps Goes Beyond Infrastructure as Code

5 min read

Network configuration pipelines can be a complex maze of forks and paths that require special timing, and keys. The current network configuration pipeline needs to go, and be completely replaced in NetDevOps.

October 9, 2017

DEVELOPER

Part 1: Embrace NetDevOps, Say Goodbye to a “Culture of Fear”

4 min read

NetDevOps is one of many new terms coming into the IT lexicon as “DevOps” has become widely adopted and lauded as a positive and valuable approach to software development.  As the  IT industry looks to expand DevOps to other areas, NetDevOps has emerged along with other new terms such as “ChatOps”, “SecDevOps” and even “NoOps”. […]

May 1, 2020

DEVELOPER

Mid Season Check-in with NetDevOps Live!

3 min read

NetDevOps Live! episodes in April were fantastic, looking at Ansible, GitLab, Batfish and HashiCorp. Get ready for May's amazing line-up, with shows on Postman, NetBox, and ELK!

March 20, 2020

DEVELOPER

Announcing NetDevOps Live! Season 3

3 min read

Take a look at what we've got in store for Season 3 of NetDevOps Live! — powerful tooling available that every NetDevOps engineer can use in their tool chest: Batfish, Postman, HashiCorp, Ansible Network Automation, NetBox and more!

January 20, 2020

DEVELOPER

CLEUR Preview! Source of Truth Driven Network Automation

9 min read

Learn what a Source of Truth is, and see how DevNet Sandbox uses Netbox to drive network automation!

October 29, 2019

DEVELOPER

Network Service Based Automation Part 2 – Building Services

36 min read

Part 2 video looks at the development process, and walks you through the 4 steps in service creation.