Xerox 180 IPS TCP/IP: Performance Tuning Guide, KEEPALIVEOPTIONS INTERVAL 10 SENDGARBAGE FALSE

DEFINING THE PRINTER TO THE HOST: TCP/IP ATTACHMENT

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 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.

Table E-8.TCP/IP Profile dataset statements example – MVS

ACBPOOLSIZE					1000
ADDRESSTRANSLATIONPOOLSIZE					1500
CCBPOOLSIZE					150
DATABUFFERPOOLSIZE					160		32768
ENVELOPEPOOLSIZE					750
IPROUTPOOLSIZE					300
LARGEENVELOPEPOOLSIZE					50
RCBPOOLSIZE					50
SCBPOOLSIZE					256
SKCBPOOLSIZE					256
SMALLDATABUFFERPOOLSIZE					256
TCBPOOLSIZE					512
TINYDATABUFFERPOOLSIZE					256
UCBPOOLSIZE					100
KEEPALIVEOPTIONS		INTERVAL		10		SENDGARBAGE		TRUE
ENDKEEPALIVEOPTIONS
GATEWAY
; * Network	First hop		Linkname Packet size Subnet mask Subnet value
9	=		BPCLAN		2000		0.255.255.0 0.99.12.0
DEFAULTNET	9.99.12.254 BPCLAN				2000		0.255.255.0 0

References: For information about the TCP/IP profile and the statements described in this section, refer to the following publications:

•

•

TCP/IP for MVS: Customization and Administration Guide

TCP/IP: Performance Tuning Guide

XEROX DOCUPRINT 96/4635/180 IPS INSTALLATION PLANNING GUIDE E-13