152 SOCKETS TCP/IP Stack
MX3 Reference Guide E-EQ-MX3RG-J-ARC
tcp irtt Sub-command
tcp irtt displays or sets the initial round-trip-time estimate. When specified without an argument,
the command displays the current values of TCP parameters including the initial round-trip-time
in milliseconds.
time is the initial round-trip-time (IRTT) estimate and is used for new TCP connections until the
actual value can be measured and adapted to. By increasing this value when operating over slow
communication links, unnecessary retransmissions that otherwise occur before the smoothed
estimate value approaches the correct value are minimized. The system default is 5000
milliseconds.
To affect incoming connections, tcp irtt should be executed before the servers are started.
Example
tcp irtt 120
Sample Output
TCP: IRTT 5 ms Retry 6 MSS 1460 SMSS 1460 Window 2920
tcp lport Sub-command
tcp lport specifies the local port starting number. When specified without a number the current
value of the next free local port number is displayed.
Example
tcp lport 2004
Sample output
Lport = 2004
tcp mss Sub-command
tcp mss displays or sets the TCP maximum segment size in bytes. When size is not specified, the
current values of the TCP parameters, including the maximum segment size, are displayed. It is
recommended to reduce the MSS and SMSS on bad network connections.
Example
tcp mss 1460
tcp retry Sub-command
tcp retry displays or sets the retry count before a connection is broken. When specified without the
number parameter, tcp retry displays the current values of TCP parameters, including the retry
count.
