software-defined-networking

name	software-defined-networking
description	Software-defined networking concepts
license	MIT
compatibility	opencode
metadata	{"audience":"network-engineers","category":"networking"}

What I do

• Implement SDN principles and architectures
• Deploy network programmability
• Configure SDN controllers
• Design overlay networks
• Implement network virtualization
• Manage network policies through software

When to use me

Use me when:

• Modernizing network infrastructure
• Implementing network automation
• Building private cloud networks
• Creating multi-tenant environments
• Requiring dynamic network configuration

Key Concepts

SDN Benefits

• Centralized Control: Single view of network
• Programmability: API-driven configuration
• Agility: Rapid service deployment
• Cost: Reduced hardware dependency
• Automation: Reduced manual tasks

Overlay vs Underlay

• Underlay: Physical network (switches, routers)
• Overlay: Virtual network on top (VXLAN, NVGRE)

Physical Network (Underlay)
   │
   │  +──────────────────────┐
   │  │    VXLAN Tunnel      │
   │  │  (Overlay Network)   │
   │  │   Tenant A │ Tenant B│
   │  └──────────────────────┘
   ▼
VM A ──────────────── VM B

Network Virtualization

• VXLAN: MAC in UDP encapsulation
• NVGRE: GRE encapsulation
• Geneve: Flexible encapsulation
• STT: Stateless tunnel transport