I/O Connectivity

FICON Support of Cascaded Directors

With FICON support of cascaded switches and directors, a FICON channel or a FICON CTC (defined as CHPID type FC) can connect a server to a device or other server using two (same vendor) directors providing high availability, business resilience, as well as a fiber optic infrastructure cost savings and improved utilization for cross-site connectivity – reducing channel requirements and configuration complexity. This support is for a two-switch, single-hop configuration only. For a complete list of supported directors and switches, visit the System Storage Interoperation Center (SSIC) page.

FICON Support of cascade Directors graphic.

Refer also to IBM z Systems Business Resilience solutions including IBM Parallel Sysplex® technology, IBM Capacity on Demand, and IBM GDPS®.

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Infrastructure matters. Businesses turn to the IBM mainframe for unmatched security, operational efficiency, speed, seamless scale, and lower cost per transaction. The IBM z System, the world’s premier data and transaction engine, is enabled for mobile, integrates transactions and analytics, and delivers efficient and trusted clouds.

Operating Systems

IBM z Systems supports multiple operation systems:


IBM z Systems combine leading-edge innovation and unparalleled capabilities to power cloud, business analytics, mobile applications, and the most important workloads.


Do you have questions about the new I/O functionalities?


Do you have the appropriate FICON jumpers, patch cables, and conversion kits for your server? For all your cabling needs see the z Systems Fiber Cabling Services in the IBM Resource Link Services section (registration required)

IBM education

Are you ready for FICON? Learn about FICON Planning, Operation, Implementation, and Problem Determination, Course #ES326