Chapter 8. ONS 15454 Storage-Area Networking
Because applications have a great need for storage capacity, the limited internal storage for servers has not been enough over the past few years. As a result, storage capacity has been added externally to the server, and storage-networking protocols have been developed to allow the server to access the external storage devices. With the growth of servers and storage devices, managing this network became difficult. Many companies consolidated their servers and storage to help overcome this management problem. The Small Computer System Interface (SCSI) protocol has been used to connect servers to storage devices because most servers and storage devices supported this protocol. However, the cabling distance for SCSI is severely limited, and other protocols, such as Fibre Channel, were developed to overcome this distance limitation. This chapter focuses on the storage-area networking (SAN) extension using the Cisco ONS 15454. SAN extensions provide the capability to use the different locations of storage devices. This is commonly referred to as having "islands" of storage devices. You can link these islands using SAN extension solutions. More specifically, you can use 15454 networks to connect SANs in different geographical locations. This is important because of the need to consolidate data center resources and to create architecture for disaster recovery and high availability. Service providers can offer managed SAN services for businesses that do not have the resources to extend their SANs on their own. This chapter introduces you to the SAN extension capabilities of the ONS 15454 and addresses the following areas:
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EAN: 2147483647
Pages: 140