Explanation/Reference:
Explanation:
Principles of SAN Design
The underlying principles of SAN design are relatively straightforward: plan a network topology that can handle the number of ports necessary now and into the future; design a network topology with a given end- to-end performance and throughput level in mind, taking into account any physical requirements of a design (for example, whether the data center is or will in the future be located on multiple floors of a building or in multiple buildings or locations); and provide the necessary connectivity with remote data centers to handle the business requirements of business continuity and disaster recovery.
These underlying principles fall into five general categories:
* Port density and topology requirements-Number of ports required now and in the future
* Device performance and oversubscription ratios-Determination of what is acceptable and what is unavoidable
* Traffic management-Preferential routing or resource allocation
* Fault isolation-Consolidation while maintaining isolation
* Control plane scalability-Reduced routing complexity
Reference: http://www.cisco.com/c/en/us/products/collateral/interfaces-modules/storage-networking- modules/prod_white_paper0900aecd8044c807.html