TCP/IPv6 Configuration and Management Manual (G06.29+, H06.03+, J06.03+)

SCF Reference for NonStop TCP/IPv6
HP NonStop TCP/IPv6 Configuration and Management Manual—524523-012
8-45
ALTER MON Command for TCP6MAN
EXPANDSECURITY { ON | OFF }
is not supported in NonStop TCP/IPv6.
TCPPATHMTU { ON | OFF }
is ON to cause TCP to use PATH MTU discovery on all TCP-type sockets
(SOCK_STREAM), unless disabled by the SETSOCKOPT for SO_PMTU. The
default is ON.
TCPTIMEWAIT int
is the amount of time in seconds that a TCP connection remains in the TIME_WAIT
state. The default is 60 seconds. The range is 1 to 120.
RFC1323-ENABLE { ON | OFF }
is ON to cause TCP to support TCP Large Windows as documented in RFC 1323.
When this option is enabled, NonStop TCP/IPv6 uses the TCP Window Scale and
Timestamp options as described in RFC 1323. The largest TCP window supported
is 262144 bytes when this option is enabled, and 65535 when the option is
disabled. The default is ON.
TCP-INIT-REXMIT-TIMEOUT int
is the initial retransmit timer-value in milliseconds to use on a TCP connection.
When the first round-trip timer measurement is made on a TCP connection and the
retransmission-timeout calculation for use on the next sent packet is done, this
value is used (unless the calculated value is larger). This variable can be used to
help reduce the number of premature retransmission timeouts. The default is 1000
milliseconds, or 1 second. The range is 200 to 30000 milliseconds.
TCP-MIN-REXMIT-TIMEOUT int
is the minimum value allowed for the TCP retransmission timeout. If this value is
too low the TCP6MON can generate premature retransmissions. If this value is set
too high, real retransmissions are delayed, increasing the time for error recovery.
The default is 1000 milliseconds. The range is 50 to 30000 milliseconds.
TCP-LISTEN-QUE-MIN int
is the minimum queue length that sits on a TCP socket when the TCP6MON
handles a socket LISTEN or ACCEPT_NW1 function call. This value is used if the
queue length specified in the socket request is lower, otherwise the queue length in
the socket request is used. The default is 128. The range is 1 to 1024.
INITIAL-TTL int
specifies the initial value for UDP and TCP TTL. The default is 64, but can be
altered to 30.