NON-QDIO operational mode

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

z990 OSA-Express Token-Ring

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

 

 

The same OSA-Express Token-Ring feature is supported on 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: OSA-Express 155 ATM and OSA-2 FDDI are no longer supported. If ATM or FDDI support are still required, a multiprotocol switch or router with the appropriate net-

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

work interface for example, 1000BASE-T Ethernet, GbE LX or GbE SX can be used to provide connectivity between the LAN and the ATM network or FDDI LAN.

Server to User connections

A key strength of OSA-Express and associated Commu- nications Server protocol support is the ability to accom- modate the customer’s attachment requirements, spanning combinations of TCP/IP and SNA applications and devices. Customers can use TCP/IP connections from the

remote site to either their TCP/IP or SNA applications on zSeries and S/390 by confi guring OSA-Express with QDIO and using either direct TCP/IP access or use appropriate SNA to IP integration technologies, such as TN3270 Server and Enterprise Extender for access to SNA applications. Customers who require the use of native SNA-based con- nections from the remote site can use a TCP/IP or SNA transport to the data center and then connect into zSeries and S/390 using appropriate SNA support on OSA- Express features confi gured in non-QDIO mode.

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IBM z/OS manual NON-QDIO operational mode, Z990 OSA-Express Token-Ring, Server to User connections