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Tuning Parameters for
/etc/system
Appendix B Analysis Tools 151
ndd -set /dev/tcp
tcp_cwnd_max 65535
The maximum value of TCP congestion window (cwnd) in bytes.
ndd -set /dev/tcp
tcp_rexmit_interval_min
3000
The default minimum retransmission timeout (RTO) value in
milliseconds. The calculated RTO for all TCP connections cannot
be lower than this value.
ndd -set /dev/tcp
tcp_rexmit_interval_
max 10000
The default maximum retransmission timeout value (RTO) in
milliseconds. The calculated RTO for all TCP connections cannot
exceed this value.
ndd -set /dev/tcp
tcp_rexmit_interval_
initial 3000
The default initial retransmission timeout value (RTO) in
milliseconds
ndd -set /dev/tcp
tcp_time_wait_interv
al 60000
The time in milliseconds a TCP connection stays in TIME-WAIT
state. Refer to RFC 1122, 4.2.2.13 for more information.
ndd -set /dev/tcp
tcp_keepalive_interv
al 900000
The time in milliseconds a TCP connection stays in KEEP-ALIVE
state. Refer to RFC 1122, 4.2.2.13 for more information.
ndd -set /dev/tcp
tcp_conn_req_max_q
<value>
The default maximum number of pending TCP connections for a
TCP listener waiting to be accepted by accept(SOCKET).
ndd -set /dev/tcp
tcp_conn_req_max_q0
<value>
The default maximum number of incomplete (three-way handshake
not yet finished) pending TCP connections for a TCP listener.
ndd -set /dev/tcp
tcp_ip_abort_interva
l <value>
Refer to RFC 793 for more information on TCP three-way
handshake.
ndd -set /dev/tcp
tcp_ip_abort_interva
l <value>
The default total retransmission timeout value for a TCP connection
in milliseconds. For a given TCP connection, if TCP has been
re-transmitting for tcp_ip_abort_interval period and it has not
received any acknowledgment from the other endpoint during this
period, TCP closes this connection.
Table B-3 TCP/IP Options
TCP/IP Options Description