TCP/IP Configuration and Management Manual

SCF Reference
TCP/IP Configuration and Management Manual—427132-004
4-30
ALTER PROCESS Command
RFC1323-ENABLE ON | OFF
is ON to cause TCP to support TCP Large Windows as documented in RFC 1323.
When this option is enabled the TCP/IP process will use 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 for this option 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
calculation is done to arrive at the retransmission timeout to use on the next packet
sent, this value will be 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 TCP/IP process may generate premature retransmissions. If this value
is set too high then real retransmissions will be delayed increasing the time for
error recovery. The default is 400 milliseconds. The range is 50 to 30000
milliseconds.
TCP-LISTEN-QUE-MIN int
is the minimum queue length that will be set on a TCP socket when the TCP/IP
process handles a socket LISTEN or ACCEPT_NW1 function call. This value will
be used if the queue length specified in the socket request is lower, otherwise the
queue length in the socket request will be used. The default value is 5. The range
is 1 to 1024.
INITIAL-TTL int
specifies the initial value for UDP and TCP TTL. The default value is 30, but you
can use the ALTER command to specify 64.
Example
The following command turns off the delay of ACKs for the process $ZTC0:
1-> ALTER PROCESS $ZTC0, DELAYACKS OFF
The following command turns on PATH MTU discovery:
1-> ALTER PROCESS $ZTC0, TCPPATHMTU ON