How to be a Network Engineer in a Programmable Age
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The document discusses the evolution of network engineering from traditional methods to a programmable approach known as netdevops, highlighting the importance of integrating DevOps practices into networking. It outlines the necessary skills for modern network engineers, including programming and automation, as well as Cisco certification paths relevant to this transition. The presentation emphasizes moving away from a 'culture of fear' in network changes towards a more agile and proactive netdevops culture.
How to be a Network Engineer in a Programmable Age
- 1. Hank Preston,ccie 38336 Principal Network Automation Engineer March 2020 Go beyond Infrastructure as Code and Automation How to be a Network Engineer in a Programmable Age Twitter: hfpreston Email: [email protected]
- 2. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected]© 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public • The NetworkEngineer of Old • The FourAges of Networking • Applying DevOps to Networking • Today’s Network Engineer • Certifications! Topics to Cover rtr$ conf t The Network Engineer Evolves
- 3. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Ye ole Network Engineer DEVNET-1725 3
- 4. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] 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?
- 5. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The Network…
- 6. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The Network…
- 7. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The Network…
- 8. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The Network…
- 9. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The Network…
- 10. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The Network…
- 11. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Please don’t ask 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
- 12. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] • Functional but consideredfragile • Network configurationmore “art than science” • Tribal knowledge of key engineers Today’s reality…
- 13. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] “Every time we implement a network change something goes wrong…” “Isn’t it great, our switch hasn’t been rebooted in 6 years” “We can’t update/change the network, our business won’t allow it” * Paraphrased quotes fromactualnetwork operators
- 14. Don’t encourage this kind of behavior!!!!
- 15. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Today’s Network Realities Sequential and Manual Infrastructure Provisioning Snowflake and Time Capsules of Configuration
- 16. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Networking through the ages…
- 17. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The Four Ages of Networking….. Stone Age Spanning Tree VLANs
- 18. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The Four Ages of Networking….. Stone Age Bronze Age Spanning Tree VLANs Routing Protocols WAN Design IP-magedon
- 19. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] 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…..
- 20. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] 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) Containers DevOps NetDevOps! The Four Ages of Networking…..
- 21. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Applying DevOps to Networking
- 22. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Organizations Today have a “Culture of Fear” Moving to a NetDevOps Culture and Mindset Changes happen rarely Changes are big and complicated The team isn't well practiced. Changeseen as high risk Problem occurs during change Changeseen as failure
- 23. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Organizations Today have a “Culture of Fear” 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 “Culture of Change” Moving to a NetDevOps Culture and Mindset Changes happen rarely Changes are big and complicated The team isn't well practiced. Changeseen as high risk Problem occurs during change Changeseen as failure
- 24. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] NetDevOps Operational Models Network as Code IT as a Service Controller Driven • Git based workflows • Close alignment to software DevOps approaches • Leverage abstractions, such as controllers, when possible • Service Catalog based workflows • Deliver End User Self Service experience in “eStores” • Network Controller based workflows • Evolving traditional network operation model
- 25. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] • Network as Code and Configuration Management strategies • Continuous Developmentapproach to network changes. • Continuous health and improvementapproach to monitoring. Configuration, Automation & Monitoring Principles
- 26. This doesn’t count as “Network as Code” (or at least isn’t ENOUGH)
- 27. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The NetDevOps Engineers Tool Chest Source Control Network Virtualization / Simulation Platforms Network Device Interfaces Network Service and Configuration Management Continuous Integration Network Verification Telemetry & MonitoringSecurity Services Artifact Repository Infrastructure Services Network Controllers
- 28. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] • Commercial vs Open Source • Programminglanguage • Supportedintegrations • Popularity in community • Relevant examples • Tool Capabilities • Used elsewherein organization How to pick a tool? (Not in priority order) Often no one tool will fit, using multiple is okay too!
- 29. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Consistent Version Controlled Infrastructure deployed with Parallel & Automated Provisioning NetDevOps Will Deliver
- 30. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] • Network Configurationstoredin Source Control • Changes are proposed in code “branches” • CICD Build Serversdeploy and test proposed configurations • Successful configurations automatically deployed to “Production” NetDevOps Pipeline: “Treating the Network as Code”
- 31. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Today’s Network Engineer
- 32. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Network Skills • Spanning-Tree • Routing Protocols • QoS • VPN Design • Spanning-Tree • VOIP • Fibre Channel • Security Policy • MPLS • Did we mention Spanning-Tree? Programming Skills • TCL • EEM • Expect Scripts A ”Traditional” Network Engineer Profile
- 33. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] 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, etc) • Python and APIs (ex: REST, NETCONF, etc) • Source Control (ex: git, GitLab, etc) • Configuration Management (ex: NSO, Ansible, Puppet, etc) A Profile of a NetDevOps Engineer!
- 34. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] • Network Controllers • IOT Networking • Cloud Networking • ”DevOps” Carl’s 3 Step Approach to Network Programmability Phase 1 • Python • REST APIs • JSON/XML/YAML • git/GitHub • Linux Skills • Config Management • Docker • NETCONF/YANG • Linux Networking • Container Networking • Network Function Virtualization Phase 2 Phase 3 As Needed Future Offering
- 35. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] What about me?
- 36. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected]© 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public Jumpstart your Journey! Network Programmability Basics 10+ hours of FREE training on DevNet http://developer.cisco.com/video/net-prog-basics/
- 37. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Cisco Certifications for the Programmable Age! Complementary balance and role alignment Cisco Certified Network Associate Skilled in how to operate and maintain Cisco hardware in a small enterprise network. Aware of programmability and network automation capabilities. DevNet Certified Associate Skilled in software development, network programmability, automation. Aware of Cisco hardware, technologies, and solutions and network fundamentals.
- 38. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] DevNet Certifications Available Today DevNet Specialist Enterprise Automation DevNet Specialist Data Center Automation DevNet Specialist Security Automation DevNet Specialist Service Provider Automation DevNet Specialist Collaboration Automation DevNet Associate DevNet Professional DevNet Specialist IoT DevNet Specialist DevOps DevNet Specialist WebEx
- 39. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Training for new job roles NetDevOps Engineer Cisco Specialist: Data Center Automate data center operations Cisco DevNet Associate Understand software development and programmability Cisco DevNet Specialist: Webex Build chat bots for alerting and monitoring CCNP Enterprise TechnologyconcentrationsProfessional certification * One possible example of combining skills and training
- 40. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Find more information on DevNet, CLN, Cisco.com Find learning lab and sandbox offeringsto start learning journey 43 developer.cisco.com/certification cisco.com/nextlevel Exam Topics Learning Labs
- 41. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected]
- 42. Summing up
- 43. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] • We looked back on the history of the network and network engineering • Traveled through the Four Ages of Networking • Exploredhow NetDevOps will change Networking • Consideredthe skills a network engineerneeds today Review
- 44. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] • Certification Information • 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 • NetDevOps Learning Labs • NetDevOps Live! • NetDevOps Videos • How to be a Network Engineer in a Programmable Age • Network as Code in Action • Benefits of Configuration Management What do do next?
- 45. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] [email protected] @hfpreston http://github.com/hpreston @CiscoDevNet facebook.com/ciscodevnet/ http://github.com/CiscoDevNet Got more questions? Stay in touch! Hank Preston developer.cisco.com
- 47. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Supporting Info
- 48. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] NetDevOps Tool Chest
- 49. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The NetDevOps Engineers Tool Chest Source Control Network Virtualization / Simulation Platforms Network Device Interfaces Network Service and Configuration Management Continuous Integration Network Verification Telemetry & MonitoringSecurity Services Artifact Repository Infrastructure Services Network Controllers
- 50. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The NetDevOps Engineers Tool Chest Source Control Network Virtualization / Simulation Platforms Continuous Integration Build Server Network Verification Telemetry & MonitoringSecurity Services Artifact Repository Infrastructure Services Source Control systems enable easy management of documents, code, and other pieces of information with tooling to support collaboration, revision management, and easy distribution. Source Control Network Device Interfaces Network Controllers
- 51. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Network Device Interfaces Network Controllers The NetDevOps Engineers Tool Chest Source Control Network Virtualization / Simulation Platforms Network Service and Configuration Management Build Server Network Verification Telemetry & MonitoringSecurity Services Artifact Repository Infrastructure Services CI Servers monitor source control and automate the process of deploying, testing, and other actions as updates are made. Continuous Integration
- 52. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Network Device Interfaces Network Controllers The NetDevOps Engineers Tool Chest Source Control Network Virtualization / Simulation Platforms Network Service and Configuration Management Continuous Integration Network Verification Telemetry & MonitoringSecurity Services Artifact Repository Infrastructure Services Store and serve objects. Eg Objects: Templates, Containers, Binaries Eg Protocols: http, scp, ftp, etc Artifact Repository
- 53. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Network Device Interfaces Network Controllers The NetDevOps Engineers Tool Chest Source Control Network Virtualization / Simulation Platforms Network Service and Configuration Management Continuous Integration Network Verification Telemetry & MonitoringSecurity Services Artifact Repository Infrastructure Services Network Service and Configuration Management tools enable Network as Code and ensure the desired state of the network. Network Service and Configuration Management
- 54. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] Network Device Interfaces Network Controllers The NetDevOps Engineers Tool Chest Source Control Network Virtualization / Simulation Platforms Network Service and Configuration Management Continuous Integration Network Verification Telemetry & MonitoringSecurity Services Artifact Repository Infrastructure Services Assure network health through the evaluation of configurationand operational state. Network Verification
- 55. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The NetDevOps Engineers Tool Chest Source Control Network Virtualization / Simulation Platforms Network Device Interfaces Network Service and Configuration Management Continuous Integration Network Verification Telemetry & MonitoringSecurity Services Artifact Repository Infrastructure Services Network ControllersEnable programmatic interactionforconfiguration and telemetry operations through transport protocols and data models. Network Device Interfaces CLI SNMP NETCONF RESTCONF REST gRPC JSON-RPC YANG
- 56. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The NetDevOps Engineers Tool Chest Source Control Network Virtualization / Simulation Platforms Network Device Interfaces Network Service and Configuration Management Continuous Integration Network Verification Telemetry & MonitoringSecurity Services Artifact Repository Infrastructure Services Network ControllersNetwork Controllers provide an abstraction layer to simplify device management. Network Controllers
- 57. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The NetDevOps Engineers Tool Chest Source Control Network Virtualization / Simulation Platforms Network Service and Configuration Management Continuous Integration Network Verification Telemetry & MonitoringSecurity Services Artifact Repository Infrastructure Services Network Virtualization and Simulation Platforms support creating and managing network topologies for use across development, test, and production environments. Network Virtualization / Simulation Platforms Network Device Interfaces Network Controllers
- 58. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The NetDevOps Engineers Tool Chest Source Control Network Virtualization / Simulation Platforms Network Service and Configuration Management Continuous Integration Network Verification Telemetry & MonitoringSecurity Services Artifact Repository Infrastructure Services Support RBAC, AAA, & Certificate Services across network. Security Services Network Device Interfaces Network Controllers
- 59. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The NetDevOps Engineers Tool Chest Source Control Network Virtualization / Simulation Platforms Network Service and Configuration Management Continuous Integration Network Verification Telemetry & MonitoringSecurity Services Artifact Repository Infrastructure ServicesDeliver required services to the network. Eg Services:IPAM, DHCP, DNS, NTP Infrastructure Services Network Device Interfaces Network Controllers
- 60. © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public Twitter: @hfpreston | Email: [email protected] The NetDevOps Engineers Tool Chest Source Control Network Virtualization / Simulation Platforms Network Service and Configuration Management Continuous Integration Network Verification Telemetry & MonitoringSecurity Services Artifact Repository Infrastructure Services Ingest, process, & make available telemetry data from the network. Eg Sources:syslog, netflow, gRPC, SNMP Telemetry & Monitoring Network Device Interfaces Network Controllers