Guide Series
Linux & Scripting
Linux fundamentals, server administration, Bash scripting, and automation for network engineers.
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Python for Networks
Python programming from the ground up, focused on network automation, APIs, and tooling.
Start Learning →AI & Automation
Practical AI guides for technical professionals — LLMs, APIs, self-hosting, and building AI-powered tools.
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Fortinet SDWAN
Comprehensive guides from NSE4 through NSE7. Configuration, design, and real-world SDWAN deployment with FortiGate.
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Cisco SDWAN
Cisco Catalyst SDWAN (Viptela) architecture, the ENSDWI/SDWSCS exam-blueprint study series, and enterprise routing and switching.
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Arista / VeloCloud SDWAN
Arista (formerly VMware) VeloCloud — orchestrator, edges, gateways, business policy, and real deployment experience.
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Palo Alto Prisma SDWAN
CloudGenix lineage, ION and Strata Cloud Manager, app-defined path selection, and Prisma Access/CloudBlades security.
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Juniper SDWAN
Mist cloud management and Session Smart Routing (SSR, ex-128 Technology) — Juniper’s SDWAN platform and field notes.
Start Learning →Personal & Off-Topic
Beyond networking — study guides for non-technical certifications like the RYA Marine Radio (SRC), and hobby deep dives.
Start Learning →Latest from the Blog
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OSPF Deep Dive Part 1: Neighbor States, DR/BDR Election, and Network Types
The first post in a full OSPF series covering Cisco, FortiOS, and Junos: the hello protocol, the neighbor state machine, why DR/BDR election exists, and the network types that decide whether an election happens at all.
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OSPF Deep Dive Part 10: A Vendor-Neutral Troubleshooting Methodology
A structured way to diagnose OSPF problems that works on any vendor, because it's built on the neighbor state machine from Part 1, not on any platform's specific commands: what state is it stuck at, and what does that state rule in or out.
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OSPF Deep Dive Part 11: Show Commands and the LSDB, Side by Side
The same neighbor table, interface state, and LSDB, read through three different command sets: Cisco IOS/IOS-XE, FortiOS, and Junos, mapped side by side against the CORE-CSR/BRANCH-FGT/EDGE-MX lab from this series.