NS3000/iX NMMGR Screens Reference Manual - Edition 8 (36922-90038)

64 Chapter4
Network Transport Configuration Screens
Transmission Control Protocol (TCP) Configuration
flow control and retransmissions. TCP connections and
NetIPC have a one-to-one correspondence for calls to
IPCCONNECT, and therefore between each Network
Service invoked by each user. There is no multiplexing
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: 1–4096
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