No storage area network will be static. It is constantly facing the problem of expansion and integration with new technologies and products. The storage area network protects the user's investment by flexibly extensibility to meet future needs. Its scalability includes two aspects. On the one hand, as the size of the storage network expands, how can the original system expand to a larger fiber storage network when the user's storage requirements cannot be met; on the other hand, The development of technology can smoothly upgrade to new technologies and applications. For example, the development of IP storage has made more and more users consider iSCSI and FCIP. It is very important for FC switches to expand IP storage in the future.