Contents

• Problem description
• Redirection Mechanisms
  • HTTP-based Redirection
  • TCP Handoff
  • DNS-based Redirection
  • Discussion
  
  
• Implementation Details
  • The Apache HTTP Server
    • Request Processing Model
    • Modules
    • Configuration
    • Apache Portable Runtime
    • Multi-Processing Modules
    • Internal Data Structures
  • Redirector Design
  • The Redirector as an Apache Module
    • Replica Database
    • Redirection Policy Implementation
    • DNS Protocol Implementation
    • Configuration Routines
    • DNS/TCP Support
    • DNS/UDP Support
  
  
• Redirection Policies
  • Introduction
    • Policy Model
    • Static Name-to-Address Policy
    • Round-robin Policy
  • AS-path Length Policy
    • Routing Basics
    • Autonomous Systems
    • Border Gateway Protocol
    • Constructing a Map of the Internet
    • Policy-based Routing
    • IP-to-ASN Translation
    • Final Algorithm of the AS-path Length Policy
  • Policy Implementation
    • General Concepts
    • Simple Policies
    • The AS-path Length Policy
  
  
• Performance Evaluation
  • Performance of the DNS Transport Layer
  • Micro-Benchmarks of the AS-path Length Policy
  
  
• Conclusion
• Bibliography