Our fourth paper, Understanding the Technology and Performance Implications of FICON
Dynamic Routing is mainframe centric and was written by David Lytle and Steve Guendert. As
part of the z13 announcement in January 2015, IBM announced support for a new FICON routing
technique for FICON interswitch links (ISLs) called FICON Dynamic Routing (FIDR). This paper
explains how the predecessor technology (static routing) works, compares it with the new FICON
Dynamic Routing mechanism, and concludes with a discussion of the possible use cases where
implementing FICON Dynamic Routing will be of the most benefit to z Systems end users.