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CHAPTER 1: NETWORK DESIGN CONCEPT, CLERANCE WALTER ANAK CLEMANT - Coggle…
CHAPTER 1: NETWORK DESIGN CONCEPT
NETWORK REQUIREMENTS
Stay up all the time
Fast recovery
Should reliably deliver applications and provide reasonable response times.
Application Response Time
Should be secure
Should be easy to modify to adapt to network growth and general business changes
Ease of management
Troubleshooting should be easy. Finding and fixing a problem should not be too time-consuming
Fast troubleshooting
NETWORK DESIGN GOAL
Scalability
Availability
Security
Manageability
ARCHITECTURE OF FLAT NETWORK DESIGN
Adequate for small networks using Layer 2 switching
THREE-LAYER HIERARCHICAL NETWORK DESIGN
Used to group devices into multiple networks
Core layer
Distribution layer
Access layer
THE CISCO ENTERPRISE ARCHITECTURES
Used to further divide the three-layer hierarchical design into modular areas.
Entreprise campus
Server farm
Enterprise edge
METHODOLOGY
Indentify network requirement
Characterize existing network
Design the network topology and solution
THREE-LAYER MODEL INTO MODULAR AREAS
CISCO LIFECYCLE SERVICES
Designed to support evolving networks
A six-phase approach (PPDIOO).
The Prepare phase
The Plan phase
The Design phase
The Implement phase
The Operate phase
The Optimize phase
APPROACHES FOR NETWORK DESIGN
Top-Down
Adapts the network infrastructure to the needs of the organisation.
clarifies the design goals and initiates the design from the perspective of the required applications and network
solutions, such as IP telephony, content networking, and video conferencing.
Bottom-Up
A common approach but not recommended.
The network designer selects network devices and technologies based on previous experience rather than prior
understanding of the organisation.
CLERANCE WALTER ANAK CLEMANT
