User`s guide

4: BSC 3270 Link Configuration Options
DC 900-1340I 101
4.20 Read Session Option (23)
The read session option determines what happens on the line when data is received on
a link for which there is no Read session (Section 2.2 on page 35) currently attached.
Under ordinary circumstances a link has a Manager session reading incoming data and
transmitting outgoing data, or it has a Manager session sending data and a Read session
receiving incoming data. If the Read session for a particular link doesn’t exist, and this
option is set to disable (the default setting), incoming data blocks are routed to the
Manager session for that link. If the option is set to enable, and the Read session for a
given link is non-existent, incoming data blocks are NAK’d, and any buffers currently
queued for the Read session are dequeued and discarded. When a Read session is
resumed on that link, incoming data is sent to the Read session as is done normally.
To set this option using the DLI configuration file, use the readSession parameter; for
example,
readSession = ”no”. See Table 7–1 on page 190.
4.21 Interpoll Delay Option (25)
This BSC 3270 option determines the amount of time a control station delays after each
general poll. The setting value is an integer between 0 (no delay) and 8192 where each
unit represents a delay of a tenth of a second.
For a tributary station, this option controls the time to wait between polls from the con-
trol station. After responding to a poll or select, the tributary station starts the interpoll
timer for the specified amount of time. If another poll or select is not received before the
timer expires, the tributary sends the
DLI_ICP_ERR_STATION_DOWN error report to the cli-
ent. On receipt of the next valid poll or select, the tributary sends the
DLI_ICP_ERR_STATION_UP error report and restarts the timer. A setting of zero disables the
station up/down reporting for the tributary station.
To set this option using the DLI configuration file, use the interpollDelay parameter; for
example,
interpollDelay = 0. See Table 7–1 on page 190.