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