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Its advanced failover mechanisms create the highest levels of stackable resiliency for hardware and software reliability . In another step toward deploying efficient , cost-effective , consolidated storage networks , the Cisco MDS 9500 Series of multilayer directors supports IVR , the industry 's first routing functionality for Fibre Channel . As storage area networks ( SANs ) grow , so do the challenges for monitoring and resolving performance issues . In another step toward deploying the most efficient , cost-effective , consolidated storage networks , the Cisco MDS 9000 Family 4-Gbps Fibre Channel switching modules support IVR functionality for Fibre Channel . Features are key to a Switch successfully serving the needs of each layer of the Data Center , and more importantly , to the business needs served by the Data Center .