NS3000/iX NMMGR Screens Reference Manual - Edition 9 (36922-90040)

Chapter 4 77
Network Transport Configuration Screens
Transmission Control Protocol (TCP) Configuration
of user or Network Services data over TCP connections.
The number of connections configured should reflect an
estimation of the number of Network Services and
NetIPC users that will be active simultaneously. This
includes both outbound and inbound connections. The
value configured should be relatively large to
accommodate expansion. Note that the allocation of
buffers is related to the number of TCP connections. If
this field is modified, the NI screens controlling buffer
allocation (NETXPORT.NI.NIname for outbound buffers,
and NETXPORT.NI.NIname.PROTOCOL.IP for store and
forward buffers) must be updated.
Default value: 128
Range: 1–20000
Retransmission interval lower bound (Secs)
The retransmission interval is the smallest interval (in
seconds) that a TCP connection waits for a reply from a
remote node before retransmitting a packet. If the
calculated SRT time is greater than this value, then the
SRT time is used for retransmission. Increase the value
if connections are being dropped prematurely or if there
is too much traffic due to packet retransmission.
Default value: 4
Range: 1–999
Maximum time to wait for remote response (sec)
This is the total time allowed for retransmissions.
Increase this value if connections are being dropped
prematurely. Decrease this value if there is too much
traffic due to packet retransmission.
Default value: 180
Range: 10–32767
Initial retransmission interval (secs)
This field sets the initial amount of time that TCP will
wait for a reply from a remote node before attempting
to retransmit a packet. This value is used for
connection setup when the retransmission interval has
not yet been calculated. It should be greater than the
retransmission interval lower bound.
Default value: 5
Range: 2–999