IBM Open Systems Adapter-Express Features OSA-Express, z890 OSA-Express 1000BASE-T Ethernet

Open Systems Adapter-Express Features (OSA-Express)

With the introduction of the z890, the OSA-Express Adapter family of Local Area Network (LAN) features is offering a maximum of 20 features per system, versus the maximum of 12 features per system on prior genera- tions, expanding the z890 balanced solution to increase throughput and responsiveness in an on demand oper- ating environment. These features combined with z/OS and z/OS.e, or OS/390, z/VM, Linux on zSeries, TPF, and VSE/ESA can help deliver a balanced system solution to increase throughput and decrease host interrupts to con- tinue to help satisfy your business goals.

Each of the OSA-Express features offers two ports for con- nectivity delivered in a single I/O slot, with up to a maxi- mum of 40 ports per z890. Each port uses a single CHPID and can be separately confi gured. For a new z890 build, you can choose any combination of OSA-Express fea- tures: the new OSA-Express Gigabit Ethernet LX or SX, the new OSA-Express 1000BASE-T Ethernet or OSA-Express Token-Ring. The prior OSA-Express Gigabit LX and SX, the OSA-Express Fast Ethernet, and the OSA-Express Token- Ring can be carried forward on an upgrade from z890.

TCP/IP stack utilization improvement for OSA-Express

The OSA-Express features support 480 devices and 160 TCP/IP stacks (480 devices / 3 = 160 stacks). Now the OSA-Express features will allow a single LPAR to contain all 160 stacks. Previously, in order to use all 160 stacks, the CHPID had to be shared by multiple LPARs as the number of stacks per LPAR was limited to 84.

This improvement is exclusive to the z890 and z990, requires the May 2004 level of Licensed Internal Code, is supported by z/OS and z/VM, and applies to the OSA- Express features when in QDIO mode: GbE, 1000BASE-T Ethernet, Fast Ethernet and Token-Ring.

z890 OSA-Express 1000BASE-T Ethernet

The new OSA-Express 1000BASE-T Ethernet feature replaces the current Fast Ethernet (10/100 Mbps) feature. This new feature is capable of operating at 10,100 or 1000 Mbps (1 Gbps) using the same copper cabling infrastructure as Fast Ethernet, making the transition to this higher speed Ethernet feature a straightforward process. It is designed to support Auto-negotiation, QDIO and non-QDIO environments on each port allowing you to make the most of your TCP/IP and SNA/APPN® and HPR environments at up to gigabit speeds.

When this adapter is operating at gigabit Ethernet speed it runs full duplex only. It also can support standard (1492 byte) and jumbo (8992 byte) frames.

non-QDIO mode	QDIO Mode - TCP/IP
SNA Passthru
TCP/IP Passthru
HPDT MPC
	10/100/1000 Mbps
	Ethernet (copper)
	IBM ^pSeries®,
10/100/1000 Mbps		RS/6000®
Ethernet (copper)
	IBM ^xSeries®,
		Netfinity®
Switch/	10/100/1000	Switch/
		Hub/
Hub/	Mbps
		Router
Router	Ethernet
10/100 Mbps
Ethernet
	Server	10/100 Mbps
Server		Ethernet
DLSw Router		IP Router

		Internet or
IP WAN	IP WAN	extranet
Intranet	Intranet	Remote Office
Remote Office
DLSw	IP Router
Router
4/16 Mbps		4/16 Mbps
Token-Ring		Token-Ring
		TCP/IP
		applications
SNA DLSw		TN3270 browser
		access to SNA
TCP/IP
		applications

Native SNA	Enterprise
	Extender for

SNA end points

	10/100 Mbps		10/100 Mbps
Server Ethernet		Server Ethernet

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