Ideas, guides and practical lessons for better network engineers.
Routing
The BGP decision process is long, but only a handful of steps decide most real-world paths. Here's how to actually reason through it.
2 min read · Aug 10, 2026
Redistribution is where two routing domains meet — and where most loops are born. A practical checklist for doing it safely.
Switching
Bundle four links into one and spanning tree stops seeing a loop — but only if both sides agree on how the bundle is built.
Design
Key principles and a practical blueprint for networks that grow with you instead of fighting you at every new building.
If you can read the LSDB, OSPF has no secrets. A tour of LSA types 1 through 7 and what each one is actually telling you.
Security
'Trusted internal network' was always a fiction. Segmentation is what makes zero trust something you can actually configure.
Automation
Automate configs, backups and changes safely and repeatably — without writing a full-blown application to do it.
Everything a trunk does comes down to a 4-byte tag. VLANs, native VLANs, DTP and why you should never let a port negotiate.
Every campus doesn't need a dedicated core layer. Here's how to tell which model actually fits the network in front of you.
Data plane traffic is switched in hardware, but everything punted to the CPU is an attack surface. Control Plane Policing fixes that.
Career
Skills, milestones and resources to level up your networking career — from first help-desk ticket to principal engineer.
Low Latency Queuing is CBWFQ with one strict-priority queue bolted on. Here's how the voice queue works — and why it's also a policer.
One is a milestone most networking careers pass through. The other is a much bigger commitment. Here's how to decide which one you need next.
You don't need a pipeline on day one. Putting configs in Git and reviewing diffs is most of the value, by itself.
Nobody expects you to know everything in month one. Here's what actually matters early on — and what doesn't.
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