The OSA-Express6S 1000BASE-T Ethernet feature supports auto-negotiation when attached to an Ethernet router or switch. If you allow the LAN speed and duplex mode to default to auto-negotiation, the OSA-Express port and the attached router or switch auto-negotiate the LAN speed and duplex mode settings between them. They then connect at the highest common performance speed and duplex mode of interoperation. If the attached Ethernet router or switch does not support auto-negotiation, the OSA-Express port examines the signal that it is receiving and connects at the speed and duplex mode of the device at the other end of the cable. 

The OSA-Express6S 1000BASE-T Ethernet feature can be configured as CHPID type OSC, OSD, OSE, or OSM. Non-QDIO operation mode requires CHPID type OSE. 

Note:  CHPID type OSN is not supported on OSA-Express6S 1000BASE-T Ethernet feature for NCP (LP to LP). 

The following settings are supported on the OSA-Express6S 1000BASE-T Ethernet feature port: 

GLYPH<SM590000> Auto-negotiate 

GLYPH<SM590000> 100 Mbps half-duplex or full-duplex 

GLYPH<SM590000> 1000 Mbps full-duplex 

If auto-negotiate is not used, the OSA-Express port attempts to join the LAN at the specified speed and duplex mode. If this specified speed and duplex mode do not match the speed and duplex mode of the signal on the cable, the OSA-Express port does not connect. 

## OSA-Express5S 

The OSA-Express5S feature is installed in the PCIe I/O drawer. The following OSA-Express5S features can be installed on z14 servers (carry forward only): 

GLYPH<SM590000> OSA-Express5S 10 Gigabit Ethernet LR, FC 0415 

GLYPH<SM590000> OSA-Express5S 10 Gigabit Ethernet SR, FC 0416 

GLYPH<SM590000> OSA-Express5S Gigabit Ethernet LX, FC 0413 

GLYPH<SM590000> OSA-Express5S Gigabit Ethernet SX, FC 0414 

GLYPH<SM590000> OSA-Express5S 1000BASE-T Ethernet, FC 0417 

The OSA-Express5S features are listed in Table 4-5 on page 133. 

## OSA-Express5S 10 Gigabit Ethernet LR (FC 0415) 

The OSA-Express5S 10 Gigabit Ethernet (GbE) Long Reach (LR) feature includes one PCIe adapter and one port per feature. The port supports CHPID types OSD and OSX. 

The 10 GbE feature is designed to support attachment to a single-mode fiber 10 Gbps Ethernet LAN or Ethernet switch that is capable of 10 Gbps. The port can be defined as a spanned channel and shared among LPARs within and across logical channel subsystems. 

The OSA-Express5S 10 GbE LR feature supports the use of an industry standard small form factor LC Duplex connector. Ensure that the attaching or downstream device includes an LR transceiver. The transceivers at both ends must be the same (LR to LR). 

The OSA-Express5S 10 GbE LR feature does not support auto-negotiation to any other speed and runs in full duplex mode only. 

A 9 µmsingle-mode fiber optic cable that ends with an LC Duplex connector is required for connecting this feature to the selected device. 

