5486wrkperf.fm Draft Document for Review October 18, 200444 IBM Eserver i5 and iSeries System Handbook When a device has multiple addresses defined for multiple sessions tosupport jump screen or an attached printer, each session counts toward themaximum active addresses supported by that workstation controller. When a device has a single address defined with shared sessions, that devicecounts as one of the maximum active addresses. There can be up to fourshared sessions on a single device.There is a maximum of 300 shared sessions per I/O processor (IOP).Refer to Technote Twinaxial Attached Device Throughput for Twinaxial Devices,TIPS0358, to determine the types of sessions that count toward the maximum. Italso discusses the 5250 Express Data Stream capabilities relative to twinaxialworkstation adapters.Communication WAN restrictionsCommunication restrictions for Peripheral Component Interconnect (PCI)systems are defined in the “LAN/WAN adapters” section of the model chapters inthe IBM Eserver iSeries and AS/400e System Builder, SG24-2155. You can findrules for individual communication cards (adapters or IOPs) and sizing rules inthe specific adapter or IOP feature description within each model chapter of theSystem Builder.You can also find placement information in the Eserver Hardware InformationCenter to install an adapter. Start at this website:http://publib.boulder.ibm.com/infocenter/eserver/v1r2s/en_US/index.htm?info/iphak/howtodecide.htmFor general communications performance considerations, refer to the onlinedocument iSeries Performance Capabilities Reference, SC41-0607.iSeries server structure and terminologyThe IBM Eserver i5 520, 550, 550, 570, and 595 servers, and the iSeries 810,825, 870, and 890 servers, include a Processor feature and an Edition feature: Processor feature: Feature code by which the processor is ordered Edition feature: Feature code by which the package of features is ordered Server feature: Feature code by which the processor configuration isorderedIBM Eserver i5 and iSeries models offer two CPW ratings:
