[PDF] [PDF] How to be a Network Engineer in a - Cisco Networking Academy

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Hank Preston, Principal Engineer

NetDevOpsEvangelist

ccie38336 R/S @hfpreston github.com/hpreston An evolution that goes beyond Infrastructure as Code and

Automation

How to be a Network Engineer in a

Programmable Age

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

The Network Engineer of Old

The Four Ages of

Networking

Cloud to the Rescue

Enter NetDevOps

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Topics to Cover

rtr$ conft

The Network Engineer Evolves

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Ye ole Network Engineer

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Network Skills

Spanning-Tree

Routing Protocols

QoS

VPN Design

Spanning-Tree

VOIP

FibreChannel

Security Policy

MPLS

Did we mention Spanning-Tree?

Programming Skills

TCL EEM

Expect Scripts

Meet Carl the Network Engineer

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

The Network"

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The Network"

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

The Network"

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

The Network"

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

The Network"

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

The Network"

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

3OHMVH GRQ·P MVN

about this"

Black Magic

Oh Yeah"We Got

this

The OSI Model of Networking"

L1: Physical

L2: Data Link

L3: Network

L4: Transport

L5: Session

L6: Presentation

L7: Application

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

Networking through the ages"

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The Four Ages of Networking"..

Stone Age

Spanning Tree

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

The Four Ages of Networking"..

Stone AgeBronze Age

Spanning Tree

VLANs

Routing Protocols

WAN Design

IP-magedon

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

Stone AgeBronze AgeThe 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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© 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public Stone AgeBronze AgeThe RenaissanceProgrammable 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

´)MNULŃVµ

Network Function

Virtualization (NFV)

Containers

DevOps

NetDevOps!7OH )RXU $JHV RI 1HPRRUNLQJ"BB

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

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of the

Enterprise

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App EconomyInternet of ThingsTech Unicorns

User Expectations and

Agility

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bother"

Low barrier of entry for

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

The Cloud You Plan to Build -

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The Cloud You End

Up With I

The Cloud You Plan to Build -

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The New Infrastructure Stack

Infrastructure

Operating System

Development

Environment

Vagrant, Docker, Vim, Slack,

Spark, Git

UCS/ACI, HP, vSphere/NSX

CoreOS, Rancher, RedHat,

Ubuntu, Microsoft

Users and

Developers

Architects and

Operators

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

The New Infrastructure Stack

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

UCS/ACI, HP, vSphere/NSX

CoreOS, Rancher, RedHat,

Ubuntu, Microsoft

UCS Director, vRealize,

OpenStack, AWS, CloudCenter

Users and

Developers

Architects and

Operators

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

The New Infrastructure Stack

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

GitHub, BitBucket, Jenkins,

Team City, Drone, Puppet,

Ansible, Chef

Vagrant, Docker, Vim, Slack,

Spark, Git

UCS/ACI, HP, vSphere/NSX

CoreOS, Rancher, RedHat,

Ubuntu, Microsoft

UCS Director, vRealize,

OpenStack, AWS, CloudCenter

Users and

Developers

Architects and

Operators

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

The New Infrastructure Stack

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

GitHub, BitBucket, Jenkins,

Team City, Drone, Puppet,

Ansible, Chef

Vagrant, Docker, Vim, Slack,

Spark, Git

UCS/ACI, HP, vSphere/NSX

CoreOS, Rancher, RedHat,

Ubuntu, Microsoft

UCS Director, vRealize,

OpenStack, AWS, CloudCenter

Users and

Developers

Architects and

Operators

DevOps Engineers

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

The New Infrastructure Stack

Infrastructure

Operating System

Cloud Management

and Automation

Scheduling and

Placement

Applications and

Middleware

Delivery Pipeline

Development

Environment

IaaS PaaS

Container Layer

Docker/Swarm, Kubernetes,

Mesosphere, Tectonic, Rancher,

Rocket

HAProxy, Cassandra, RabbitMQ,

Hadoop, Consul

GitHub, BitBucket, Jenkins,

Team City, Drone, Puppet,

Ansible, Chef

Vagrant, Docker, Vim, Slack,

Spark, Git

UCS/ACI, HP, vSphere/NSX

CoreOS, Rancher, RedHat,

Ubuntu, Microsoft

UCS Director, vRealize,

OpenStack, AWS, CloudCenter

Users and

Developers

Architects and

Operators

DevOps Engineers

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

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

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

Enter NetDevOps!

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Changes

happen rarely

Changes are

big and complicated

The team

isn't well practiced.

Change seen

as high risk

Problem

occurs during change

Change seen

as failure

Organizations

Today have a

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Moving to a NetDevOpsCulture and Mindset

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Changes

happen rarely

Changes are

big and complicated

The team

isn't well practiced.

Change seen

as high risk

Problem

occurs during change

Change seen

as failure

Organizations

Today have a

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Changes are

regular activities Each change is small

The team is

well practiced

Change was

tested and verified

Change was

uneventful

Change

seen as success

NetDevOps

will require a

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Moving to a NetDevOpsCulture and Mindset

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

Network Configuration stored in

Source Control

Changes are proposed in code

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CICD Build Servers deploy and

test proposed configurations

Successful configurations

automatically deployed to

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NetDevOps3LSHOLQH ´7UHMPLQJ POH 1HPRRUN MV FRGHµ © 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public

Distributed Source Control

(git, Subversion, Mercurial, GitHub, BitBucket, GitLab)

The NetDevOps Engineers Tool Bag

(Example tools, not comprehensive)

Network Device

YANG/Native Data Model

Configuration DataOperational Data

Configuration Management

(Ansible, Puppet, NSO, NAPALM, DIY)

Network

Virtualization

Platforms

(VIRL/CML, NFVIS,

Vagrant)

Build Server

(GitLab, Jenkins, Team City, Drone)

Network Test Tooling

(pyATS, TRex, Robot, Behave)Telemetry & Monitoring (ELK, Grafana, Pipeline, UTM)

Development Environment

(Vagrant, NSO, VIRL/CML)Test Environment (VIRL/CML)Production Environment

CLISNMPNETCONF/

RESTCONFgRPCREST APIs

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

Distributed Source Control

The NetDevOps Engineers Tool Bag

(Cisco Products and Projects)

Network Device

YANG/Native Data Model

Configuration DataOperational Data

Configuration Management

Network

Virtualization

Platforms

Build Server

Network Test ToolingTelemetry & Monitoring

Development EnvironmentTest EnvironmentProduction Environment

CLISNMPNETCONF/

RESTCONFgRPCREST APIs

Network Test Tooling

pyATS, TRex

Network Virtualization

Platforms

NFVIS

VIRL/CML

NSO VNFs

Configuration Management

Network Service Orchestrator

(NSO)

Development Environment

NSO, VIRL, VNFs

Test Environment

VIRL/CML

Telemetry & Monitoring

Pipeline, UTR

Network Device

DNA Center Platform, APIC, Meraki, IOS XE, IOS XR, NX-OS,

Firepower, UCS

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

7RGM\·V 1HPRRUN Engineer

© 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public FMUO·V 3 6PHS $SSURMŃO PR 1HPRRUN 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

µGHY2SVµ

Phase 2Phase 3

As Needed

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Network Skills

Layer 2 & 3 Fundamentals

Quality of Service

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