Technical data

Setting Up and Managing TELNETSYM
23.5 Managing and Customizing Your Print Queues
Bit 2 is useful in unassisted problem solving. Be aware, however, that the log
file can become large because all the data sent over the link to the printer
is logged. Bits 0 and 1 are primarily for use by Compaq. However, with
knowledge of PSM$ symbionts, you might find all the options useful.
• TCPIP$TELNETSYM_LOG_KEEP
By default, TELNETSYSM saves all log files. Define this logical name to
limit the number of log files saved. The value assigned to this logical name
is the number of versions of a log file TELNETSYM will allow before it
starts purging. When the number of files reaches the number you specified,
TELNETSYM starts purging files.
For example, to configure the queue to purge after more than three copies of
the same log file are created, define the logical name as follows:
$ DEFINE /SYSTEM TCPIP$TELNETSYM_LOG_KEEP 3
• TCPIP$TELNETSYM_SCRATCH
By default, TELNETSYM stores log files and any temporary files created by
relay queues in the directory SYS$SPECIFIC:[TCPIP$LPD]. You can change
the default directory for one or all of your TELNETSYM queues. For example:
$ DEFINE /SYSTEM TCPIP$TELNETSYSM_SCRATCH device:[directory.path]
If you define the logical name TCPIP$TELNETSYM_SCRATCH, the log files
are stored in the TCPIP$TELNETSYM_SCRATCH directory.
If you do not define TCPIP$TELNETSYM_SCRATCH, the log files are stored
in TCPIP$LPD_SPOOL.
If TCPIP$LPD_SPOOL is not defined, the log files go into the
SYS$SPECIFIC:[SYSEXE] directory.
23.5.3 Controlling Characteristics of the TCP/IP Link
The TELNETSYM configuration logical names allow you to set TELNETSYM
parameters. To see the default values for these parameters, enter the following
command:
TCPIP> SHOW PROTOCOL TCP /PARAMETER
TCP
Delay ACK: enabled
Window scale: enabled
Drop count: 8
Probe timer: 150
Receive Send
Push: disabled disabled
Quota: 61440 61440
The logicals that you can use to modify these parameters are:
• TCPIP$TELNETSYM_KEEPALIVE
Controls KEEPALIVE processing.
The KEEPALIVE timer is used to periodically test the other end of a link that
appears to be idle. Its purpose is to detect when a remote host has failed or
has been brought down, or when the logical connection has been broken.
For TELNETSYM, you control this timer with the following command:
$ DEFINE/SYS TCPIP$TELNETSYM_KEEPALIVE 1
Setting Up and Managing TELNETSYM 23–5