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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.
Open Systems Adapter-Express Features
(OSA-Express)
QDIO Mode - TCP/IP
non-QDIO mode
SNA Passthru
TCP/IP Passthru
HPDT MPC
IP WAN
Intranet
Server
SNA DLSw
TCP/IP
Native SNA
Server
TCP/IP
applications
TN3270 browser
access to SNA
applications
Enterprise
Extender for
SNA end points
Remote Office
IP WAN
Intranet
Remote Office
4/16 Mbps
Token-Ring
4/16 Mbps
Token-Ring
Internet or
extranet
Switch/
Hub/
Router
IP Router
IBM ^ pSeries
®
,
RS/6000
®
IBM ^ xSeries
®
,
Netfinity
®
Server
Server
DLSw Router
Switch/
Hub/
Router
10/100 Mbps
Ethernet
10/100 Mbps
Ethernet
DLSw
Router
IP Router
10/100/1000 Mbps
Ethernet (copper)
10/100/1000 Mbps
Ethernet (copper)
10/100 Mbps
Ethernet
10/100/1000
Mbps
Ethernet
10/100 Mbps
Ethernet