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

SCF Reference for NonStop TCP/IPv6
HP NonStop TCP/IPv6 Configuration and Management Manual—524523-008
8-45
ALTER MON Command for TCP6MAN
TCPKEEPINTVL int
is the time interval in seconds between retransmissions of unacknowledged keep-
alive packets. The default is 45 seconds. The range is 1 to 1260.
TCPKEEPCNT int
is the number of times a keep-alive packet is sent without receiving an
acknowledgment. After reaching int, the TCP connection is dropped. The
default is 8. The range is 1 to 20.
DEBUG { ON | OFF }
is used by support personnel and development to enable the display of more TCP
internal information for debugging purposes.
FULLDUMP { ON | OFF }
specifies whether the QIO segment is also saved when the TCP6MON abends.
The default is ON. When set to OFF, the TCP6MON only saves its stack when
abending which conserves disk space over a full dump. The preferred setting for
this parameter is ON.
ALLNETSARELOCAL { ON | OFF }
causes TCP (when ON) to use the interface MTU as a base for determining the
TCP Maximum Segment Size (MSS) for each non-local TCP connection. A non-
local TCP connection is one that goes to another network (not just another
subnetwork). The default is ON. If this switch is OFF, TCP conforms to RFC1323-
specified behavior and uses 512 bytes as the default MSS for non-local segments.
When ON, for example for Ethernet, the non-local MSS is 1460. Setting this
parameter to ON can benefit performance.
TCPCOMPAT42 { ON | OFF }
is the flag used to set the TCP6MON compatible with BSD4.2 versions in these
regards:
•
The default value of this flag is ON.
•
If the flag is ON then the original ACK - 1 is sent in the keepalive packet;
otherwise the original ACK is sent in the keepalive packet.
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.