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Courses

Nine phases, from routing foundations to running a network in production. Each is standalone, but they're ordered so every one builds on the last.

Nothing is marked finished until it has actually been run. See the roadmap for how each phase is progressing.

Start here

  • Foundations · Linux   prerequisite

    Shell scripting, parsing device output, SSH keys and jump hosts, systemd and logs, and git for config management. The Linux a network engineer actually uses.

    Start reading →

Foundations

  • Phase 0 · IGP Fundamentals   reading track

    Link-state routing, OSPF, IS-IS, dual-stack IPv6. The underlay every later phase assumes. No lab — read it and move on.

    Start reading →

  • Phase 1 · BGP Fundamentals & Policies   4 labs validated

    eBGP and iBGP, route reflectors, path selection, and the policy tooling that decides which route actually wins.

    Overview → · Lab 01 → · Concepts →

  • Phase 2 · BGP-DIA & Internet Edge   4 labs validated

    Multi-homing to providers, RPKI, peering, and NAT / CGNAT at the edge.

    Overview → · Lab 01 → · Interview Qs →

Service provider

  • Phase 3 · MPLS & L3VPN   4 labs validated

    Moving traffic by swapping labels. LDP, RSVP-TE, and L3VPN options A, B and C.

    Overview → · Lab 01 → · Interview Qs →

  • Phase 3.5 · Segment Routing   3 labs validated

    SR-MPLS, SR-PCE, Ti-LFA and the basics of SRv6. How hyper-scalers (FAANG) steer traffic without building state in the core, and how SDN controllers integrate with IGPs.

    Overview → · Lab 01 → · Interview Qs →

Data centre

  • Phase 4 · EVPN Services   4 labs validated

    VXLAN-EVPN fabrics, EVPN-ELAN and EVPN-VPWS, and stretching EVPN between sites with DCI.

    Overview → · Lab 01 → · Concepts →

Operations

  • Phase 5 · NetDevOps (Network Automation)   planned

    NetBox (Source of Truth), Python (Nornir/Netmiko), and Ansible. Treating infrastructure as code with CI/CD pipelines to validate ECMP paths and deploy fabrics programmatically.

  • Phase 6 · Hybrid Cloud & Edge   planned

    AWS Transit Gateway, BGP over DirectConnect, IPsec and SD-WAN.

  • Phase 7 · Telemetry & Observability   planned

    Replacing legacy SNMP with gNMI and OpenConfig streaming telemetry. Building a modern SRE monitoring stack with Prometheus, Grafana, and TRex traffic generation.

Not sure where to start?

New to routing — Phase 0, then 1 and 2. Data-centre focus — Phase 1, then jump straight to Phase 4, which is live today. Service provider — Phase 1, then 3 and 3.5. Already know the protocols — Phases 5 and 7 are where most of the actual job is.

Also available: the Juniper VXLAN-EVPN archive — a complete written course kept as reading material.