Studies On The Software System Of Line Card In Fiber Channel Switch

With the growth of the capability of storage system and speed of processor, the requirement of the information make the technology of storage area network which has realized network storage more and more popular in many fields. SAN is a special network that realizes rapid and reliable access between server and storage equipment. It perfectly meets the needs of data storage, data share, and remote data recovery, etc.Fibre channel is an industry standard connection and high performance serial I/O protocol. Because of the advantages such as supporting a large number of equipment, distensible, high bandwidth, low-delay, long-distance transmission, and supporting the block-oriented storage protocol, in fact, it becomes the standard protocol in SAN.Fibre channel switch is the key device in SAN, it connects the server and storage equipment using the fibre channel fabric. In this dissertation, we simply introduce the technology of SAN and fibre channel first, and then analysis the design scheme of the fibre channel switch which has 16*16 fabric and the port rate is 2Gbps. Base the introduction of part of the fibre channel protocol, we present the implementation of line card controller which bases the processor of S3C44B0X, and we study the main function and structure of the software system of line card in the switch. We implement the basic control function of the system includes fabric login, route table update, hardware initial and status real-time monitor under uCLinux, disscuss the expanded function which includes supporting SNS, SCN, zoning, fabric , ISL trunking, etc, and obligate the extended interface. We also introduce the building of the developing environment, discuss the debugging scheme of the software system, and give the related debugging results. At last, the further develop scheme is proposed.