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In a redundant system , two control engines operate in an active / standby mode with one control engine always active . Google , the current leader in the search-engine market , achieved its astonishing rise because it is more fit than the alternatives . Cisco Fabric Manager is a responsive , easy-to-use Java application that simplifies management across multiple switches and fabrics . At the ingress , the Catalyst 2960 Series also polices to determine whether a packet is in or out of profile , marks to change the classification label , passes through or drops out of profile packets , and queues packets based on classification . For larger fabrics , users may prefer to use 3rd party tools that integrate more capability in terms of reporting and 3rd party device configuration . VSANs can be used to achieve higher security and greater stability in Fibre Channel fabrics by providing isolation among devices that are physically connected to the same set of switches . This model is engineered for high performance server clusters typically found in high performance computing centers . With a broad selection of chassis , supervisor engines , line cards , and power supplies , the Cisco Catalyst 4500 Series provides a flexible platform to meet the needs of organizations large and small . As storage islands are consolidated and migrated to enterprise-wide fabrics new security challenges arise . Specifically , finance data centers requiring financial analysis , major film companies rendering animations for films , design modeling for manufacturing and search engines are all examples of enterprise-based customers looking to use this design model for their Data Center . Cisco IOS Software provides integrated multilayer functions in a single image and is optimized for deployment in core and distribution networks , for Internet access , and in data centers . Up to 85 percent of the investment ( line cards , power supplies , and so on ) can be protected when upgrading supervisor engines . Although each of these reasons is a valid reason for building out separate fabrics , doing so can become quite wasteful .