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

image

  • Core Layer: connects Distribution Layer devices
  • Distribution Layer: interconnects smaller LANs

  • Distribution Layer: interconnects smaller LANs

Subdividing the three-layer model into modular areas:

  1. Enterprise campus
  2. Server farm
  3. Enterprise edge

image

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.