Defining the printer to the host: TCP/IP attachment

Considerations for configuring TCP/IP for MVS

Following are some considerations for configuring TCP/IP for MVS:

To specify a TCP/IP address space name other than the default (TCPIP), code the following EXEC statement in the appropriate PSF writer procedure:

STEP01 EXEC PGM=APSPPIEP,

PARM=(,,,,tcpip_name), REGION=4096K

where tcpip_name is the name of the TCP/IP address space.

If this parameter is not coded, PSF uses the default name, TCPIP. (For a full description of the PARM parameter, refer to Print Services Facility/MVS: Diagnosis Guide and Reference.)

KEEPALIVEOPTIONS statement: PSF relies on TCP to detect when a connection with the printer is no longer usable. When no data has been exchanged between PSF and its connection partner, TCP sends keep-alive probes to the connection partner periodically. These periodic probes, called keep-alive transmissions, enable TCP to discover when a connection is no longer usable, even if the connection partner is abruptly powered off or is no longer accessible through the network.

The frequency of keep-alive transmissions is controlled by the INTERVAL parameter on the KEEPALIVEOPTIONS statement. The frequency applies to all TCP applications that direct TCP to send keep-alive transmissions. The default frequency is after about two hours of inactivity.

For printing on the NPS/IPS, it is recommended you specify a shorter interval than the default—such as 10 minutes—for the interval between keep-alive transmissions. Also, unless any target host requires that the keep-alive packet contain data, specify SENDGARBAGE FALSE. For example:

KEEPALIVEOPTIONS INTERVAL 10 SENDGARBAGE FALSE ENDKEEPALIVEOPTIONS

If you change any of the values in the TCP/IP profile, restart TCP/IP to pick up the changes.

Installation Planning Guide

F-15

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Xerox 2060 manual Considerations for configuring TCP/IP for MVS, Exec PGM=APSPPIEP