🌐 Enterprise Network Evolution (2012-2026)

From Physical Silicon to Cloud-Native Networking

📖 The "Accidental Admin" Journey

This repository is a technical timeline of my professional evolution. Between 2012 and 2019, I built and managed company-owned data centers from the ground up. I wasn't just a cloud consumer; I was the person running the cables, racking the Cisco, Huawei and Dell PowerEdge servers, and configuring the physical silicon across Layers 1 through 7.

This project demonstrates my ability to design, automate, and maintain critical infrastructure using Infrastructure as Code (Vagrant) and Modern Network Operating Systems (VyOS), bridging the gap between legacy physical environments and modern 2026 architectural standards.

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🏗️ Repository Architecture

The repository is structured into three distinct labs, each representing a leap in scale, redundancy, and design philosophy.

🏥 Lab-01: Small Office Collapsed Core

• The Origin (2012 Legacy): A recreation of my first "Baptism by Fire" environment—building a medical office network under a one-week deadline.
• Architecture: 2-Tier Collapsed Core (Edge + Core combined).
• Focus: 802.1Q VLAN tagging, Inter-VLAN routing, and secure service isolation (VoIP/Admin).

🏢 Lab-02: Campus Enterprise

• Scaling for Resilience: Reflects the transition into mission-critical campus environments where hardware failure is not an option.
• Architecture: Traditional 3-Tier Hierarchical Model (Core, Distribution, Access).
• Focus: BGP Core Mesh, VRRP (First-Hop Redundancy), and LACP for high-availability uplinks.

🌐 Lab-03: Modern Data Center Fabric

• The 2026 Update: My current standard for high-density, automated data center blocks.
• Architecture: L3 Spine-Leaf Fabric with a full-mesh BGP underlay.
• Focus: Eliminating Spanning Tree (STP) using eBGP with ECMP for 100% bandwidth utilization and sub-second failover.

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🚀 Getting Started

This entire repository is optimized for Vagrant and VirtualBox.

Prerequisites

• Vagrant (v2.2.0+)
• VirtualBox (v6.1+)
• System RAM Recommendations:
  • Lab-01: 8GB+
  • Lab-02: 12GB+
  • Lab-03: 14GB+ (Optimized for 11-VM Data Center)

Quick Start

# Clone the repository
git clone https://github.com/your-username/enterprise-network-evolution.git
cd enterprise-network-evolution

# Navigate to a lab and deploy
cd lab-03-modern-dc-fabric-spine-leaf
vagrant up

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🛠️ Portfolio Context

These networking labs serve as the "Underlay" for a broader Platform Engineering ecosystem:

• Hybrid Cloud: Linking these local fabrics to AWS via VyOS Site-to-Site VPNs.
• Modern Workloads: Deploying AWS EKS nodes on top of the routed Leaf switches.
• Observability: Monitoring the BGP mesh via Grafana, Prometheus, and Loki.

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🎓 Contact & Links

• LinkedIn: Tyrel Orde Fecha
• Portfolio Website: Coming Soon!