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LOCAL_PREF 200 TCP/179 AS_PATH 65002 65003
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Focused write-ups built around one engineering question, one lab, and enough evidence to reproduce the result.

  • Arista

Building a Lightweight Network Lab with Netlab and Containerlab on Ubuntu 24.04

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13 min read
  • BGP, Cisco

Learning Byte 002: Following BGP Routes Across Multiple Autonomous Systems

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13 min read
  • BGP, Cisco

Learning Byte 001: BGP Fundamentals

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14 min read

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New lab notes, reference material, and practical write-ups across the network.

  • Arista

Building a Lightweight Network Lab with Netlab and Containerlab on Ubuntu 24.04

Build a lightweight network lab on Ubuntu using netlab, containerlab, Docker, and Cisco IOL for fast, repeatable topology deployment and testing.

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13 min read
  • BGP, Cisco

Learning Byte 002: Following BGP Routes Across Multiple Autonomous Systems

Follow BGP routes across multiple autonomous systems and see how AS_PATH, route propagation, loop prevention, and best-path selection work in a real lab.

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13 min read
  • BGP, Cisco

Learning Byte 001: BGP Fundamentals

Learn the core concepts behind BGP, including autonomous systems, eBGP vs. iBGP, peer communication, neighbor states, message types, route advertisements, and AS_PATH.

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14 min read
  • Automation, Python

Junos PyEZ Foundations

Learn the foundations of Junos PyEZ by connecting to Junos devices, retrieving structured operational data, and working with the results in Python.

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15 min read
  • Palo Alto

Out-of-Band Management That You’ll Actually Be Glad You Built

Console servers, a separate path, and the failure modes a dedicated OOB network quietly saves you from at 3am.

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6 min read
  • Automation

From SSH Scripts to a Real Source of Truth with NetBox

Why a database beats a folder of YAML, and a migration path you can take one device type at a time without a big-bang cutover.

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11 min read

Built for engineers

Evidence over abstraction.

Configuration, command output, packet behavior, and lab observations stay close to the explanation. The goal is documentation that can be revisited months later and still be useful.

Cisco IOSBGP
R1# show ip bgp ipv4 unicast
Network         Next Hop        Path
*> 10.3.3.3/32   10.12.12.2      65002 65003 i
*  10.3.3.3/32   10.14.14.2      65004 65003 i