How to Be a Network Engineer in a Programmable · Team City, Drone, Puppet, Ansible, Chef Vagrant, Docker, Vim, Slack, Spark, Git ... Jenkins, Team City, Drone, Puppet, Ansible, Chef

How to Be a Network Engineer in a Programmable Age

Hank Preston, NetDevOps Evangelistccie 38336, R/S@hfpreston

DEVNET-1725

© 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public

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How

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• The Network Engineer of Old

• The Four Ages of Networking

• Cloud to the Rescue

• Enter NetDevOps

• Today’s Network Engineer

How to Be

A Network Engineer in a Programmable Age

rtr$ conf t

The Network Engineer Evolves


A look at our history…

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Meet Carl the Network Engineer

Programming Skills Networking Skills

• TCL

• EEM

• Expect Scripts

• Spanning-Tree

• Routing Protocols

• QoS

• VPN Design

• Spanning-Tree

• VOIP

• Fibre Channel

• Security Policy

• MPLS

• Spanning-Tree

• Did I mention Spanning-Tree?

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The Network…

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The Network…

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The Network…

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The Network…

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The Network…

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The Network…

DEVNET-1725 12


Please don’t

ask about this…

Black Magic

Oh Yeah… We

Got this

DEVNET-1725

The OSI Model of Networking…

L1: Physical

L2: Data Link

L3: Network

L4: Transport

L5: Session

L6: Presentation

L7: Application

13

Networking through the ages…

© 2018 Cisco and/or its affiliates. All rights reserved. Cisco PublicDEVNET-1725

The Four Ages of Networking…..

Stone Age

Spanning Tree

VLANs

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Stone Age Bronze Age

Spanning Tree

VLANs

Routing Protocols

WAN Design

IP-magedon

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Stone Age Bronze Age The Renaissance

Spanning Tree

VLANs

Routing Protocols

WAN Design

IP-magedon

SDN

OpenFlow

Controllers

Overlays

MP-BGP

VXLAN

Micro-Segmentation

White Box

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Stone Age Bronze Age The Renaissance Programmable Age

Spanning Tree

VLANs

Routing Protocols

WAN Design

IP-magedon

SDN

OpenFlow

Controllers

Overlays

MP-BGP

VXLAN

Micro-Segmentation

White Box

Cloud

Python

REST / APIs

NETCONF / YANG

“Fabrics”

Network Function Virtualization (NFV)

DevOps

Containers

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”Digitization” in the Enterprise


App Economy Internet of Things Tech Unicorns

User Expectations and Agility If it isn’t connected, don’t

bother…

Low barrier of entry for

disruptors

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© 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public 21DEVNET-1725


The Cloud You Plan to Build

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The Cloud You End Up With

The Cloud You Plan to Build

DEVNET-1725


The New Infrastructure Stack

Infrastructure

Operating System

Development

EnvironmentVagrant, Docker, Vim, Slack,

Spark, Git

UCS/ACI, HP, vSphere/NSX

CoreOS, Rancher, RedHat,

Ubuntu, Microsoft

Users and

Developers

Architects and

Operators 24



Infrastructure

Operating System

Cloud Management

and Automation

Delivery Pipeline

Development

Environment

GitHub, BitBucket, Jenkins,

Team City, Drone, Puppet,

Ansible, Chef

Vagrant, Docker, Vim, Slack,

Spark, Git



Ubuntu, Microsoft

UCS Director, vRealize,

OpenStack, AWS, CloudCenter

Users and

Developers

Architects and

Operators 25



Infrastructure

Operating System

Cloud Management

and Automation

Scheduling and

Placement

Applications and

Middleware

Delivery Pipeline

Development

Environment

Container Layer

Docker/Swarm, Kubernetes,

Mesosphere, Tectonic, Rancher,

Rocket

HAProxy, Cassandra,

RabbitMQ, Hadoop, Consul



Ansible, Chef


Spark, Git



Ubuntu, Microsoft



Users and

Developers

Architects and

Operators 26



Infrastructure

Operating System

Cloud Management

and Automation

Scheduling and

Placement

Applications and

Middleware

Delivery Pipeline

Development

Environment

Container Layer



Rocket

HAProxy, Cassandra,




Ansible, Chef


Spark, Git



Ubuntu, Microsoft



Users and

Developers

Architects and

Operators

DevOps

Engineers

27



Infrastructure

Operating System

Cloud Management

and Automation

Scheduling and

Placement

Applications and

Middleware

Delivery Pipeline

Development

Environment

Iaa

SP

aa

S

Container Layer



Rocket

HAProxy, Cassandra,




Ansible, Chef


Spark, Git



Ubuntu, Microsoft



Users and

Developers

Architects and

Operators

DevOps

Engineers

28


Network Stakeholders

Network Builders

• Traditional networking teams

• Design, Build, and Maintain the Network

• Responsible for Care and Feeding

Network Consumers

• The users of the network

• Looking to consume network “services”

• The network is a “utility” – It should just work

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Enter NetDevOps!



Moving to a NetDevOps Culture and Mindset

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Moving to a NetDevOps Culture and Mindset

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NetDevOps Pipeline: “Treating the Network as Code”

• Network Configuration stored in Source Control

• Changes are proposed in code “branches”

• CICD Build Servers deploy and test proposed configurations

• Successful configurations automatically deployed to “Production”


Infrastructure as Code Repositories

The NetDevOps Configuration Tooling Stack

Network Device

YANG Data Model

Configuration Data Operational Data

Configuration Management

Network

Virtualization

Platforms

Build Server

Network Test Tooling Telemetry & Monitoring

Development Environment Test Environment Production Environment

CLI NETCONF RESTCONF gRPC SNMP

DEVNET-1725 35

© 2018 Cisco and/or its affiliates. All rights reserved. Cisco PublicDEVNET-1725 36



Carl’s 3 Step Approach to Network Programmability

Phase 1

• Python

• REST APIs

• JSON/XML

• git/GitHub

• Linux Skills

• Ansible

• Docker

• NETCONF/YANG

• Linux Networking

• Container Networking

• NFV

• Network Controllers

• IOT Networking

• Cloud Networking

• ”DevOps”

Phase 2 Phase 3

As Needed

DEVNET-1725 38


Carl has Embraced Programmability!

Core Programming “New” Networking Stuff

• Python

• REST APIs

• JSON/XML

• Linux Skills

• Ansible(Puppet/Chef/etc)

• git/GitHub

• Docker

• ”DevOps”


• NETCONF/YANG

• Container Networking

• Cloud Networking

• Linux Networking

• IOT Networking

• NFV

• NetDevOps

DEVNET-1725 39


© 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public 41

© 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public 42

Network Programmability Basics Video Course!

• 28 video lessons across 6 Categories

• Programming Fundamentals

• Network Device APIs


• Application Hosting

• NetDevOps

• Setup Instructions, Code Samples, and Infrastructure Sandboxes all provided

• 100% Free!

https://developer.cisco.com/video/net-prog-basics/

DEVNET-1725


Networking on DevNethttp://developer.cisco.com/networking

DevNet is “the” resource for engineers looking to get started with network programmability

http://developer.cisco.com/networking


DevNet Learning Labs Anytime, Anywhere! http://learninglabs.cisco.com

* New Labs and Modules Always in Development, check back often

http://learninglabs.cisco.com/


DevNet Sandboxhttp://developer.cisco.com/sandbox

* New Sandboxes always in Development, check back often

http://developer.cisco.com/sandbox


DevNet Express – “DevNet Zone in your Backyard”http://devnetevents.cisco.com

LISTEN … to technology overviews

LEARN … from trainers

PUT IT INTO PRACTICE … by completing hands-on missions

Then go back home to try it out yourself using the training

material in the online DevNet Learning Tracks

Digital Network Architecture ~ Data Center Infrastructure ~ Cloud Collaboration

http://devnetevents.cisco.com/

And Done!


• We looked back on the history of the network and network engineering

• Traveled through the Four Ages of Networking

• Talked about the impact “Cloud” has had on IT

• Explored how NetDevOps will change Networking

• Considered the skills a network engineer needs today

Review

DEVNET-1725 48


Hank Preston

• [email protected]

• @hfpreston

• http://github.com/hpreston

Cisco DevNet

• @CiscoDevNet

• facebook.com/ciscodevnet/

• http://github.com/CiscoDevNet

Got more questions? Come find me!

DEVNET-1725 49

mailto:[email protected]

http://twitter.com/hfpreston

http://github.com/hpreston

http://twitter.com/CiscoDevNet

http://facebook.com/ciscodevnet/

http://github.com/CiscoDevNet


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4. Enter messages/questions in the space

How

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Continue Your Education

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• Meet the Engineer 1:1 meetings

• Related sessions

52DEVNET-1725

Thank you

How to Be a Network Engineer in a Programmable · Team City, Drone, Puppet, Ansible, Chef Vagrant, Docker, Vim, Slack, Spark, Git ... Jenkins, Team City, Drone, Puppet, Ansible, Chef

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