How a Hierarchical Network Design Creates a Stable, Reliable, Scalable Network
Network requirements:
Ease of management
Fast recovery
Application response time
Fast troubleshooting
4 fundamental network design goals:
Scalability
Availability
Security
Manageability
- Core Layer: connects Distribution Layer devices
- Distribution Layer: interconnects smaller LANs
- Distribution Layer: interconnects smaller LANs
Subdividing the three-layer model into modular areas:
- Enterprise campus
- Server farm
- Enterprise edge
Advantages of Modular Framework
- It creates a deterministic network with clearly defined boundaries between modules.
- It eases the design task by making each module independent.
- It provides scalability by allowing enterprises to add modules easily.
- It enables the designer to add services and solution without changing the underlying network design.