Technical data

Setting Up and Managing the LPR/LPD Print Service
22.2 Configuring LPR/LPD
Table 22–1 (Cont.) LPD Logical Names
Logical Name Description
TCPIP$LPD_KEEPALIVE The KEEPALIVE timer is used to periodically
check the other end of a link that appears to
be idle. The purpose of the time is to detect
when a remote host has failed or has been
brought down, or when the logical connection
has been broken. Set this logical using the
following command:
$ DEFINE/SYSTEM TCPIP$LPD_KEEPALIVE
This logical name is not used by the server;
it is used by LPD. If you are changing this
logical name, there is no need to restart
TCP/IP Services. If this logical is defined, the
KEEPALIVE function is enabled.
By default, the KEEPALIVE timer is disabled.
Broken connections will be detected only if the
relevant application sends data.
TCPIP$LPD_PROBETIME The PROBE timer specifies:
1. When establishing an initial connection,
the number of seconds TCP/IP Services
will wait for a response before a timeout
occurs. The time is active regardless of
whether the TCPIP$LPD_KEEPALIVE
logical is set.
2. The length of time (in seconds) allowed
to pass before TCP/IP Services checks an
idle connection. This requires that the
TCPIP$LPD_KEEPALIVE logical be set.
You control the PROBE timer using the
following command:
$ DEFINE/SYS TCPIP$LPD_PROBE x
In this command, x specifies the number
of seconds to wait before timing out the
connection.
The value of the PROBE timer must always
be less than or equal to the value of the DROP
timer. The default value for the PROBE timer
is 75 seconds.
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Setting Up and Managing the LPR/LPD Print Service 22–3