Book excerpt: Multiprotocol routers have been used in data networks for decades, but routers built specifically for Storage Area Networks (SANs) are a recent innovation. This book covers multiprotocol SAN routing in general and the Brocade SilkWorm Multiprotocol Router platform in particular. Multiprotocol SAN routers today usually provide three services: Fibre Channel to Fibre Channel routing, iSCSI to Fibre Channel bridging, and FCIP tunneling for distance extension. The subjects covered for each service include theory, usage cases, and advice on designing, implementing, and managing routed SANs. "Multiprotocol Routing for SANs" offers the first comprehensive look at this cutting-edge technology.