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

78 Chapter4
Network Transport Configuration Screens
Transmission Control Protocol (TCP) Configuration
Maximum retransmissions per packet
This is the maximum number of times that TCP will
retransmit a packet before aborting the connection.
Increase the value if connections are being dropped
prematurely. Decrease the value if there is too much
traffic due to packet retransmission.
Default value: 4
Range: 1–100
Connection assurance interval (secs)
This timer allows you to adjust the time you wait for
resources to be released after an idle disconnect. If the
remote connection is abruptly interrupted, TCP waits
for the amount of time calculated by the following
algorithm:
CAinterval + (CAinterval * MAXCARTX)
where CAinterval is the connection assurance interval
and MAXCARTX is the maximum connection assurance
retransmissions.
TCP drops the connection thus freeing all resources
held by that connection. Increase this value if you are
experiencing too much overhead for retries due to idle
disconnects. Decrease this value if you are waiting too
long for resources to be freed due to idle disconnects.
Default value: 600
Range: 10–32767
Maximum connection assurance retransmissions
This is the maximum number of times that TCP will
transmit a connection assurance packet to a
non-responding remote system. Together with the
connection assurance interval, this value defines the
time it will take for an idle connection to abort if the
remote TCP fails to respond. Unlike the retransmission
timer, a backoff algorithm is not used. Therefore, the
timeout period is calculated as follows:
CAinterval + (CAinterval * MAXCARTX)
where CAinterval is the connection assurance interval
and MAXCARTX is the maximum connection assurance
retransmissions.
Default value: 4
Range: 0–999