IBM manual NON-QDIO operational mode, z890 OSA-Express Token-Ring, Note Statement of Direction

QDIO Mode - TCP/IP

pSeries, RS/6000

Gigabit Ethernet (fiber or copper)

xSeries, Netfinity

4/16/100 Mbps

Gigabit Ethernet Token-Ring

Switch / (fiber or copper) Router

Gigabit			Server
Ethernet
	10/100 Mbps		IP
			Router
Server	Ethernet
	Server
	IP WAN		Internet or
	Intranet		extranet
TCP/IP applications		IP Router	Remote Office
TN3270 browser
access to SNA appls.
Enterprise Extender
for SNA end points
			10/100 Mbps
	4/16 Mbps		Ethernet
	Token-Ring
		Server

The new Checksum offl oad support on these z890 features is designed to offl oad z/OS 1.5 and Linux TCP/IP stack pro- cessing of Checksum packet headers for TCP, IP and UDP.

NON-QDIO operational mode

The OSA-Express 1000BASE-T Ethernet, Fast Ethernet and Token-Ring also support the non-QDIO mode of operation. The adapter can only be set (via the CHPID type parameter) to one mode at a time. The non-QDIO mode does not pro- vide the benefi ts of QDIO. This support includes native SNA/

z890 OSA-Express Token-Ring

The same OSA-Express Token-Ring feature is supported on z890, z800, z990 and z900. This Token-Ring supports a range of speed including 4, 16 and 100 Mbps, and can operate in both QDIO and non-QDIO modes.

Note: Statement of Direction

OSA-Express Token-Ring not to be offered: The zSeries 890 and 990 are expected to be the last zSeries servers to offer a Token-Ring feature. It is intended that the OSA-Express Token-Ring feature will not be available for ordering on a new build or upgraded server, or for carrying forward on an upgrade. A migration from a Token-Ring to an Ethernet environment should be a part of all strategic LAN planning.

All statements regarding IBM’s plans, directions, and intent are subject to change or withdrawal without notice.

non-QDIO mode	QDIO Mode - TCP/IP
SNA Passthru
TCP/IP Passthru
HPDT MPC
4/16 Mbps
Token-Ring

Switch/	Server
Hub/
Router	4/16/100 Mbps
Server	Token-Ring
100 Mbps	Backbone
Token-Ring	100 Mbps
Backbone
	Token-Ring

Switch/

Hub/

Router Switch/

Hub/

Router

4/16 Mbps

Token-Ring

		4/16 Mbps
		Token-Ring
	16/100 Mbps
	Token-Ring		Server
Server	4/16 Mbps	IP Router
DSLw	Token-Ring
Router			Internet or
IP WAN		IP WAN	extranet
Intranet	Remote Office	Intranet	Remote Office

APPN, High Performance Routing, TCP/IP passthrough, and HPDT MPC. The new OSA-Express 1000BASE-T Ethernet provides support for TCP/IP and SNA/APPN/HPR up to 1 gigabit per second over the copper wiring infrastructure.

4/16 Mbps

Token-Ring

SNA DLSw

TCP/IP

Native SNA

10/100 Mbps

Ethernet

4/16 Mbps

Token-Ring

TN3270 browser access to SNA appls. Enterprise Extender for SNA end points

TCP/IP

applications

10/100 Mbps

Ethernet

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