PAM Management Programming Manual

Commands and Responses
PAM Management Programming Manual—142481
5-12
ALTER PORT Command
ZDELIV-MODE
determines how read requests are queued. If ZPAM-VAL-DELIV-MODE-SRL
(serial mode, which is the default mode) is selected, all read requests are placed in a
single queue and are serviced in FIFO (first in first out) order. If ZPAM-VAL-
DELIV-MODE-PLLEL (parallel mode) is selected, all read requests are placed in
separate queues, one for each opener of the port. Inbound messages are delivered to
each opener that has a read request posted.
ZMAX-REQ-SIZE
is the maximum size (in bytes) of a block of messages that can be written and read
by the port. This value cannot be larger than the line’s MAXREQUESTSIZE. The
minimum value that must be specified in this field is 32 bytes for LLC1-type ports
and 49 bytes for Ethernet-type ports. The default value is 32000 bytes.
ZDATA-FWD-TIME
is the maximum amount of time that an inbound message should wait before it is
delivered (data forward time). The waiting time is expressed in microseconds. The
valid range is 100000 through 60000000 (0.1 second through 60 seconds); however,
the resolution is in milliseconds and the last three digits are truncated. The default
value (-1) sets the data forward time to INFINITE, which means that an inbound
message will wait forever, if necessary, to be delivered.
Note that the delivery of inbound messages is also triggered when the number of
messages present in the receive queue equals the data forward count (ZDATA-FWD-
CNT) value described below, regardless of the amount of time elapsed.
ZDATA-FWD-CNT
is the maximum number of inbound messages that should be queued before they are
delivered (data forward count). The valid range is 1 through 22 messages. The
default value is 1 message.
Note that the delivery of inbound messages is also triggered when the elapsed time
since the receipt of the first message equals the data forward time (ZDATA-FWD-
TIME) value described above, regardless of the number of messages received.
Tokens in Response Buffer
The tokens present in the buffer received in response to an ALTER command are also
described in Section 4, Common Definitions.