DS-X9248-256K9 Cisco 48-Port 8-Gbps Adv Fibre Channel Switching Mod  Routers/Cisco 3900 Series it is a chassis and

it is a chassis and requires supervisor engines

the Cisco NME-XD-48ES-2S-P 48-Port EtherSwitch Service Module delivers enterprise-class performance

Dimensions (WxDxH): 14 in x 16 in x 1

and access layer deployments

Product Specifications - Cisco DS-X97-SF1-K9 Supervisor-1 Module for MDS 9700 Series

DS-X9248-256K9 Cisco 48-Port 8-Gbps Adv Fibre Channel Switching Mod  Routers/Cisco 3900 Series it is a chassis andThe Cisco 48 Port 8 Gbps Adv Fibre Channel Switching Module delivers full duplex aggregate performance of 512 Gbps, making this module well suited for attachment of high performance 8 Gbps storage subsystems or either 8 or 10 Gbps Inter Switch Links (ISLs). You will be able to consolidate SAN deployments with fewer hardware components, consolidate workloads from hundreds of virtual machines with unparalleled performance, and scale with incremental