IBM System z10 Open Systems Adapter Ethernet data router
by H. M. Haynie
J. M. Turner
J. C. Hanscom
M. Cadigan, Jr.
D. Di Genova
S. W. Salisbury
T. D. Needham
C. E. Bubb
and R. B. Tremaine
The IBM Open Systems Adapter (OSA) is a family of integrated
hardware features that enables direct connection between
IBM System z10™ hosts and clients on local area networks
(LANs). The OSA provides a virtual interface to the LAN that may be
shared by hundreds of host operating systems. The newest OSA
generation employs a hardware-based Ethernet virtualization
offload engine to significantly increase throughput and reduce
latency in line with the latest 1-Gb and 10-Gb Ethernet adapters.
The router is embodied in the OSA Ethernet data router ASIC
(application-specific integrated circuit) chipset and is packaged in
several configurations. This paper describes the function of the
OSA Ethernet data router, its hardware architecture, and the
implementation of the design.