Xerox 180 IPS manual Considerations for configuring TCP/IP for MVS

DEFINING THE PRINTER TO THE HOST: TCP/IP ATTACHMENT

Table E-7.TCP/IP Profile dataset parameters – MVS

		Source of	Range of
Item description	Default	value	acceptable values		Comments	Your value
DATABUFFERPOOLSIZE	160	Installation	7 to nnnn, where		Specify at least 160
Data buffers		preferences	nnnn is limited by		buffers.
			available virtual
			storage
DATABUFFERPOOLSIZE	16384	Installation	8192	49152	Specify a buffer size of
Buffer size		preferences	12288	65536	at least 32768, if
					possible.
			16384	98304
			24576	131072
			28672	196608
			32768	262144
SMALLDATABUFFERPOOLSIZE	0	Installation	0 to nnnn, where		Specify at least 256
		preferences	nnnn is limited by		small data buffers.
			available virtual
			storage
TINYDATABUFFERPOOLSIZE	0	Installation	0 to nnnn, where		Specify at least 256 tiny
		preferences	nnnn is limited by		data buffers.
			available virtual
			storage
KEEPALIVEOPTIONS	Interval 120	Installation			See Notes.
	sendgarbage	preferences
	false
GATEWAY max_packet_size	Defaultsize is	Installation	Can be from 576 to		Max packet size
	576	preferences	67108864, but		parameter should be no
			cannot be larger		greater than 4472 bytes
			than value specified		in a 4 Mbps LAN
			on LARGEENVE		configuration, and
			LOPEPOOLSIZE		17800 in a 16 Mbps
			statement.		LAN configuration.
					Default MTU value in
					IPS printer is 2052.

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 tcp/ip_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 IPS 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

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