Specifications

CHAPTER 1
Campus Network Design
Planning a Network Implementation
It is important to use a structured approach to planning and implementing any network changes or new network compo-
nents. A comprehensive life-cycle approach lowers the total cost of ownership, increases network availability, increases
business agility, and provides faster access to applications and services.
The Prepare, Plan, Design, Implement, Operate, and Optimize (PPDIOO) Lifecycle Approach is one structure that can be
used. The components are:
n Prepare: Organizational requirements gathering, high-level architecture, network strategy, business case strategy
n Plan: Network requirements gathering, network examination, gap analysis, project plan
n Design: Comprehensive, detailed design
n Implement: Detailed implementation plan, and implementation following its steps
n Operate: Day-to-day network operation and monitoring
n Optimize: Proactive network management and fault correction
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CCNP SWITCH 642-813 Quick Reference by Denise Donohue
FIGURE 1-3
The SONA Model
Infrastructure
Layer
Network—Campus, Branch, Data Center, Enterprise Edge, WAN, MAN, Teleworker
Servers StorageClients
Infrastructure
Services
Layer
Application Delivery/Application-Oriented Networking
Infrastructure Services
Application
Layer
Collaboration
Layer
Business Applications Collaboration Applications