How to be a Network Engineer in a Programmable Age An evolution that goes beyond Infrastructure as Code and Automation

Transcription

1 How to be a Network Engineer in a Programmable Age An evolution that goes beyond Infrastructure as Code and Automation Hank Preston, Principal Engineer NetDevOps Evangelist ccie github.com/hpreston

2 Topics to Cover The Network Engineer of Old The Four Ages of Networking Cloud to the Rescue Enter NetDevOps Today s Network Engineer The Network Engineer Evolves rtr$ conf t

3 Ye ole Network Engineer

4 Meet Carl the Network Engineer Network Skills Programming Skills Spanning-Tree TCL Routing Protocols EEM QoS Expect Scripts VPN Design Spanning-Tree VOIP Fibre Channel Security Policy MPLS Did we mention Spanning-Tree?

5 The Network

6 The Network

7 The Network

8 The Network

9 The Network

10 The Network

11 The OSI Model of Networking Please don t ask about this L7: Application L6: Presentation L5: Session L4: Transport L3: Network Oh Yeah We Got this Black Magic L2: Data Link L1: Physical

12 Networking through the ages

13 Stone Age Spanning Tree VLANs The Four Ages of Networking..

14 Stone Age Spanning Tree VLANs Bronze Age Routing Protocols WAN Design IP-magedon The Four Ages of Networking..

15 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 The Four Ages of Networking..

16 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 The Four Ages of Networking.. Cloud Python REST / APIs NETCONF / YANG Fabrics Network Function Virtualization (NFV) Containers DevOps NetDevOps!

17 Digitization of the Enterprise

18 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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20 The Cloud You Plan to Build

21 The Cloud You Plan to Build The Cloud You End Up With

22 The New Infrastructure Stack Development Environment Vagrant, Docker, Vim, Slack, Spark, Git Users and Developers Operating System CoreOS, Rancher, RedHat, Ubuntu, Microsoft Architects and Operators Infrastructure UCS/ACI, HP, vsphere/nsx

23 The New Infrastructure Stack Users and Developers Development Environment Delivery Pipeline Vagrant, Docker, Vim, Slack, Spark, Git GitHub, BitBucket, Jenkins, Team City, Drone, Puppet, Ansible, Chef Cloud Management and Automation Operating System UCS Director, vrealize, OpenStack, AWS, CloudCenter CoreOS, Rancher, RedHat, Ubuntu, Microsoft Architects and Operators Infrastructure UCS/ACI, HP, vsphere/nsx

24 The New Infrastructure Stack Users and Developers Development Environment Delivery Pipeline Scheduling and Placement Container Layer Applications and Middleware Cloud Management and Automation Operating System Vagrant, Docker, Vim, Slack, Spark, Git GitHub, BitBucket, Jenkins, Team City, Drone, Puppet, Ansible, Chef Docker/Swarm, Kubernetes, Mesosphere, Tectonic, Rancher, Rocket HAProxy, Cassandra, RabbitMQ, Hadoop, Consul UCS Director, vrealize, OpenStack, AWS, CloudCenter CoreOS, Rancher, RedHat, Ubuntu, Microsoft Architects and Operators Infrastructure UCS/ACI, HP, vsphere/nsx

25 The New Infrastructure Stack Users and Developers DevOps Engineers Development Environment Delivery Pipeline Scheduling and Placement Container Layer Applications and Middleware Cloud Management and Automation Operating System Vagrant, Docker, Vim, Slack, Spark, Git GitHub, BitBucket, Jenkins, Team City, Drone, Puppet, Ansible, Chef Docker/Swarm, Kubernetes, Mesosphere, Tectonic, Rancher, Rocket HAProxy, Cassandra, RabbitMQ, Hadoop, Consul UCS Director, vrealize, OpenStack, AWS, CloudCenter CoreOS, Rancher, RedHat, Ubuntu, Microsoft Architects and Operators Infrastructure UCS/ACI, HP, vsphere/nsx

26 IaaS PaaS The New Infrastructure Stack Development Environment Vagrant, Docker, Vim, Slack, Spark, Git Users and Developers Delivery Pipeline Scheduling and Placement Container Layer GitHub, BitBucket, Jenkins, Team City, Drone, Puppet, Ansible, Chef Docker/Swarm, Kubernetes, Mesosphere, Tectonic, Rancher, Rocket DevOps Engineers Applications and Middleware HAProxy, Cassandra, RabbitMQ, Hadoop, Consul Cloud Management and Automation UCS Director, vrealize, OpenStack, AWS, CloudCenter Operating System CoreOS, Rancher, RedHat, Ubuntu, Microsoft Architects and Operators Infrastructure UCS/ACI, HP, vsphere/nsx

27 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

28 Enter NetDevOps!

29 Moving to a NetDevOps Culture and Mindset Changes happen rarely Change seen as failure Problem occurs during change Organizations Today have a Culture of Fear Changes are big and complicated The team isn't well practiced. Change seen as high risk

30 Moving to a NetDevOps Culture and Mindset Changes happen rarely Changes are regular activities Change seen as failure Problem occurs during change Organizations Today have a Culture of Fear Change seen as high risk Changes are big and complicated The team isn't well practiced. Change seen as success Change was uneventful NetDevOps will require a Culture of Change Change was tested and verified Each change is small The team is well practiced

31 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

32 The NetDevOps Engineers Tool Bag (Example tools, not comprehensive) Distributed Source Control (git, Subversion, Mercurial, GitHub, BitBucket, GitLab) Build Server (GitLab, Jenkins, Team City, Drone) Configuration Management (Ansible, Puppet, NSO, NAPALM, DIY) Network Test Tooling (pyats, TRex, Robot, Behave) Telemetry & Monitoring (ELK, Grafana, Pipeline, UTM) CLI SNMP Configuration Data NETCONF/ RESTCONF YANG/Native Data Model Network Device grpc Operational Data REST APIs Network Virtualization Platforms (VIRL/CML, NFVIS, Vagrant) Development Environment (Vagrant, NSO, VIRL/CML) Test Environment (VIRL/CML) Production Environment

33 The NetDevOps Engineers Tool Bag (Cisco Products and Projects) Distributed Source Control Build Server Configuration Management Configuration Network Service Management Orchestrator (NSO) Network Test Tooling Network pyats, Test TRex Tooling Telemetry & Monitoring Telemetry Pipeline, & Monitoring UTR CLI SNMP NETCONF/ RESTCONF YANG/Native Network Device Data Model Network Device grpc REST APIs DNA Center Platform, APIC, Meraki, IOS XE, IOS XR, NX-OS, Configuration Data Operational Data Firepower, UCS Network Virtualization Platforms NFVIS Network Virtualization VIRL/CML NSOPlatforms VNFs Development Environment Development NSO, VIRL, Environment VNFs Test VIRL/CML Environment Production Environment Test Environment

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36 Today s Network Engineer

37 Carl s 3 Step Approach to Network Programmability Phase 1 Python REST APIs JSON/XML git/github Phase 2 Phase 3 Linux Skills Ansible Docker NETCONF/YANG As Needed Network Controllers IOT Networking Cloud Networking DevOps Linux Networking Container Networking NFV

38 Carl has Embraced Programmability! Network Skills Layer 2 & 3 Fundamentals Quality of Service Security and Segmentation Linux Networking Container Networking Cloud Networking IOT Networking Model Driven Programmability Network Function Virtualization Platform Skills Linux Administration Container Fundamentals Micro Service Platforms Cloud Fundamentals Programming Skills Data Formats (ex: JSON/YAML) Python and APIs (ex: REST) Source Control (ex: git) Configuration Management (ex: Ansible)

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41 Summing up

42 Review 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

43 What do do next? NetDevOps Readings Embrace NetDevOps, Say Goodbye to a "Culture of Fear NetDevOps Goes Beyond Infrastructure as Code What does "Network as Code" Mean? A Network Engineers Journey in Programmability NetDevOps and the Rise of the Programmable Network NetDevOps Learning Resources Network Programmability Basics Video Course Network Programmability for Application Developers NetDevOps Videos How to be a Network Engineer in a Programmable Age Network as Code in Action Benefits of Configuration Management

44 Got more questions? Stay in touch! Hank facebook.com/ciscodevnet/

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