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

SCF Reference for NonStop TCP/IPv6
HP NonStop TCP/IPv6 Configuration and Management Manual—524523-008
8-70
INFO MON Command for TCP6MAN
ALLNETSARELOCAL
is ON to cause TCP to use the interface MTU as a base for the determination of
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 RFC-
specified behavior and use 512 bytes as the default MSS for non-local segments.
When ON, for example for Ethernet, the non-local MSS is 1460. Having this
parameter set to ON can benefit performance.
TCPCOMPAT42
is the flag used to set the NonStop TCP/IPv6 subsystem compatible with BSD4.2
versions. The default value of this flag is ON. If the flag is ON then original ACK - 1
is sent in the keepalive packet, otherwise the original ACK is sent in the keepalive
packet.
EXPAND Security
is ON to cause TCP to check if a SOCKET request from another HP Expand node
has passed the Expand security check. This means the user is valid on this system
and has correct remote passwords. If the check fails then the SOCKET request is
rejected with file error 48. The default for this option is OFF.
TCP Path MTU
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 for this option is OFF.
TCP Time Wait
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.
Trace Status
is ON when the process is being traced using SCF.
Trace Filename
is the name of the current trace file.
RFC1323 Enable
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 for this option is ON.