Switched LAN Architecture

Hirarchical Network Design

Benefits of a Hirarchical Network

Scalability
- Hierarchical netowrk can be expanded easily
Redundancy
- Redundancy at the core and distribution level ensure path availability
Performance
- Link aggregation between levels and high-performance core and distribution level switches allow for near wire-speed throughout the network
Security
- Port security at the access level and policies at the distribution level make the network more secure
Manageability
- Consistency between switches at each level makes management more simple
Maintainablity
- The modularity af hierarchical design allows for the network to scale without becoming overly complicated

Network diameter

Bandwith Aggregation

bandwith Aggregation

Converged networks - One to rule them all

Voice network

Video network

Data network

Locate heavy traffic servers close to the users

Bandwidth aggregation and switch forwarding rates are important factors to consider when attempting to eliminate bottlenecks
Switches selected for data centers should be higher performing switches than the switches you would find in the wiring closets at the access layer