TCP/IPv6 Configuration and Management Manual (G06.24+)

SCF Reference for NonStop TCP/IPv6
HP NonStop TCP/IPv6 Configuration and Management Manual—524523-008
8-71
INFO MON Command for TCP6MAN
TCP Init Rexmit Timeout
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
calculation is done to arrive at the retransmission timeout to use on the next packet
sent, 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
is the minimum value allowed for the TCP retransmission timeout. If this value is
too low, the NonStop TCP/IPv6 subsystem 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 Queue Min
is the minimum queue length that is set on a TCP socket when the NonStop
TCP/IPv6 subsystem 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 value is 128.
The range is 1 to 1024.
Initial TTL
specifies the initial value for UDP and TCP TTL (Time To Live). The default is 64,
but can be altered to 30.
Min-Ephemeral-Port
is the starting port number to allocate for TCP and UDP ephemeral ports.
Ephemeral ports are those assigned by NonStop TCP/IPv6 when an application
has not bound to a specific port. The default is 1024. The allowable range is 1 to
1024 (MAX-EPHEMERAL-PORT - 16). See Considerations
on page 8-48 and
Examples
on page 8-48. See also Max-Priv-Port int.
Max-Ephemeral-Port
is the largest port number to allocate for TCP and UDP ephemeral ports. The
default is 65024. The allowable range is (MIN-EPHEMERAL-PORT + 16) to 65535.
Each TCP6MON is allocated one sixteenth of the range between min-ephemeral-
port and max-ephemeral-port. For example, using the defaults, #ZPTM0 is
allocated 1024-5023, #ZPTM1 is allocated 5024-9023 and so on. See
Considerations on page 8-48.
Max-Priv-Port int
is the largest TCP and UDP port number that needs super user access. The
default is 1023. The maximum value is one less than the MIN-EPHEMERAL-PORT