DFN50133
NETWORK DESIGN
NETWORK DESIGN CONCEPT
1.NETWORK REQUIREMENTS
Fast Recovery
Application Response Time
Easy of management
Fast troubleshooting
2.NETWORK DESIGN GOAL
Availability
Security
Scalability
Manageability
new applications without impacting the level of service delivered to existing users.
the failure of a single link or piece of equipment should not significantly impact network performance
Planning the location of security devices, filters, and firewall features is critical to safeguarding network resources.
A network that is too complex or difficult to maintain cannot function effectively and efficiently.
3.Architecture Of Flat Network Design
small networks and is implemented using Layer 2 switching.
more challenging than in a hierarchical network.
not necessarily be an issue, as long as the network stays small and manageable.
4.Three-layer hierarchical network design
Distribution layer
Access layer
Core layer
5.The Cisco Enterprise Architectures
Three areas of focus in modular network design
Server farm
Enterprise edge
Enterprise campus
Contains the network elements required for independent operation within a single campus or branch location
A component of the enterprise campus, the data centre server farm protects the server resources and provides redundant, reliable high-speed connectivity.
It contains all the elements required for efficient and secure communication between the enterprise campus and remote locations, remote users, and the Internet
6.Methodology
Step 2
Characterize existing network
Step 3
Design the network topology and solution
Step 1
Identify network requirement
7.Cisco Lifecycle Services
to successfully deploy and operate Cisco technologies.
maximise performance throughout the lifecycle of a network.
six-phase approach (PPDIOO)
SIX phases – Prepare, Plan, Design, Implement, Operate & Optimise.
Designed to support evolving networks.
8.PPDIOO Phases
The Prepare phase:
The Plan phase
Develop a network strategy
assessing the business case for the proposed architecture
network requirements based on goals, facilities, user needs, and so on.
the scope, cost, and resource parameters established in the original business requirements.
PPDIOO Phases
The Implement phase:
The Operate phase:
The Design phase:
Support availability, reliability, security, scalability, and manageability
Integrate devices without disturbing the existing network or creating points of vulnerability.
daily operations, includes high availability and reducing expenses.
9.Approaches for network design
Top-Down:
Bottom-Up:
The PPDIOO methodology uses the top-down approach.
A common approach but not recommended.
click to edit