## OSA-Express6S 1000BASE-T Ethernet 

z14 introduces an Ethernet technology refresh with OSA-Express6S 1000BASE-T Ethernet features to be installed in the PCIe I/O drawer, which is supported by the 16 GBps PCIe Gen3 host bus. The performance characteristics are comparable to the OSA-Express5S features and they also retain the same form factor and port granularity. 

Note:  Operating system support is required to recognize and use the second port on the OSA-Express6S 1000BASE-T Ethernet feature. 

The supported operating systems are listed in Table 7-8 on page 255 and Table 7-9 on page 257. 

Statement of Direction $^{a}$: OSA-Express6S 1000BASE-T adapters (#0426) is the last generation of OSA 1000BASE-T adapters to support connections operating at 100 Mbps link speed. Future OSA-Express 1000BASE-T adapter generations will support operation only at 1000 Mbps (1Gbps) link speed. 

a. All statements regarding IBM plans, directions, and intent are subject to change or withdrawal without notice. Any reliance on these statements of general direction is at the relying party’s sole risk and will not create liability or obligation for IBM. 

## OSA-Express5S 1000BASE-T Ethernet 

The OSA-Express5S 1000BASE-T Ethernet feature is installed exclusively in the PCIe I/O drawer. Each feature includes one PCIe adapter and two ports. The two ports share a CHPID, which can be defined as OSC, OSD or OSE. The ports can be defined as a spanned channel, and can be shared among LPARs and across logical channel subsystems. 

Each adapter can be configured in the following modes: 

GLYPH<SM590000> QDIO mode, with CHPID types OSD 

GLYPH<SM590000> Non-QDIO mode, with CHPID type OSE 

GLYPH<SM590000> Local 3270 emulation mode, including OSA-ICC, with CHPID type OSC 

Note:  Operating system support is required to recognize and use the second port on the OSA-Express5S 1000BASE-T Ethernet feature. 

The supported operating systems are listed in Table 7-8 on page 255 and Table 7-9 on page 257. 

## OSA-Express4S 1000BASE-T Ethernet 

The OSA-Express4S 1000BASE-T Ethernet feature is installed exclusively in the PCIe I/O drawer. Each feature includes one PCIe adapter and two ports. The two ports share a CHPID, which is defined as OSC, OSD, or OSE. The ports can be defined as a spanned channel, and can be shared among LPARs and across logical channel subsystems. 

Each adapter can be configured in the following modes: 

GLYPH<SM590000> QDIO mode, with CHPID types OSD and OSN 

GLYPH<SM590000> Non-QDIO mode, with CHPID type OSE 

GLYPH<SM590000> Local 3270 emulation mode, including OSA-ICC, with CHPID type OSC 

Note:  Operating system support is required to recognize and use the second port on the OSA-Express4S 1000BASE-T Ethernet feature. 

