IBM eServer zSeries 900 Technical Guide

Chapter 3. Connectivity 139

3.7.1 Connectivity

Following is a discussion of the connectivity options in the OSA-Express environment.

z900 OSA-Express features

z900 supports the following OSA-Express features:

򐂰 z900 OSA-Express GbE LX (feature code 2364)

򐂰 z900 OSA-Express GbE SX (feature code 2365)

򐂰 z900 OSA-Express FENET (feature code 2366)

򐂰 z900 OSA-Express 155 ATM SM (feature code 2362)

򐂰 z900 OSA-Express 155 ATM MM (feature code 2363)

A z900 server can support a maximum of 12 OSA-Express features (24 ports).

z900 OSA-Express GbE LX feature

The z900 OSA-Express GbE LX feature (feature code 2364) occupies one slot in the z900

zSeries I/O cage. The feature has two independent ports with one CHPID associated with

each port. The z900 OSA-Express GbE LX feature supports the 1000BASE-LX standard

transmission scheme.

Each port supports connection to a 1 Gbps Ethernet LAN via 9 micron single-mode fiber optic

cable terminated with an SC Duplex connector.

Multimode(62.5 or 50 micron) fiber cable may be used with the z900 OSA-Express GbE LX

feature. The use of these multimode cable types requires a mode conditioning patch (MCP)

cable to be used at each end of the fiber link. Use of the single-mode to multimode MCP

cables reduces the supported optical distance of the link to a maximum end-to-end distance

of 550 meters.

The z900 OSA-Express GbE LX feature only supports QDIO mode and TCP/IP. The

Enterprise Extender (EE) function of Communications Server for z/OS and OS/390 allows

you to run SNA applications and data on IP networks and IP-attached clients. See “Enterprise

Extender” on page 137.

The z900 OSA-Express GbE LX feature is supported by the z900 Channel CHPID

Assignment facility described previously.

z900 OSA-Express GbE SX feature

The z900 OSA-Express GbE SX feature (feature code 2365) occupies one slot in the z900

zSeries I/O cage. The feature has two independent ports with one CHPID associated with

each port. The z900 OSA-Express GbE SX feature supports the 1000BASE-SX standard

transmission scheme.

Each port supports connection to a 1 Gbps Ethernet LAN via 62.5 micron or 50 micron

multimode fiber optic cable terminated with an SC Duplex connector.

Note: IBM Statement of Direction - announced April 2002

zSeries (z900 and z800) servers will be the last family of servers to provide OSA-Express

ATM features.