IBM z13s, Техническое руководство

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IBM z13s Technical Guide
The maximum supported unrepeated distance, point-to-point, is 300 meters (984 ft.). A
client-supplied cable is required. Three types of cables can be used for connecting the port to
the selected 10 GbE switch or to a 10GbE RoCE Express feature on another server:
򐂰 OM3 50 micron multimode fiber optic cable that is rated at 2000 MHz-km that terminates
with an LC Duplex connector (supports 300 meters (984 ft.))
򐂰 OM2 50 micron multimode fiber optic cable that is rated at 500 MHz-km that terminates
with an LC Duplex connector (supports 82 meters (269 ft.))
򐂰 OM1 62.5 micron multimode fiber optic cable that is rated at 200 MHz-km that terminates
with an LC Duplex connector (supports 33 meters (108 ft.))
For more information about the management and definition of the 10GbE RoCE, see D.2,
“Shared Memory Communication over RDMA” on page 476 and Appendix G, “Native
Peripheral Component Interconnect Express” on page 521.
4.14 zEDC Express
zEDC Express is an optional feature (FC 0420) that is available on z13s, z13, zEC12, and
zBC12 servers. It is designed to provide hardware-based acceleration for data compression
and decompression.
The feature installs exclusively on the PCIe I/O drawer. One to eight features can be installed
on the system. There is one PCIe adapter/compression coprocessor per feature, which
implements compression as defined by RFC1951 (DEFLATE).
A zEDC Express feature can be shared by up to 15 LPARs.
For more information about the management and definition of the zEDC feature, see
Appendix J, “IBM zEnterprise Data Compression Express” on page 551 and Appendix G,
“Native Peripheral Component Interconnect Express” on page 521.
Switch configuration for RoCE: If the IBM 10GbE RoCE Express features are connected
to 10 GbE switches, the switches must meet the following requirements:
򐂰
Global Pause function enabled
򐂰
Priority flow control (PFC) disabled
򐂰
No firewalls, no routing, and no IEDN