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

SCF Reference for NonStop TCP/IPv6
HP NonStop TCP/IPv6 Configuration and Management Manual—524523-008
8-133
STATS MON Command for TCP6MAN
messages in a short period of time, it is usually an indication that the host is not
correcting its routing table.
When the NonStop TCP/IPv6 subsystem services the In Redirect messages, it
adds a dynamic route entry of the name #DYRTn. This dynamic route is used in
lieu of the previous route which has been redirected.
In Source Quench
is the number of Source Quench (type 4) messages received. A gateway sends
this message to the NonStop TCP/IPv6 subsystem to indicate that the gateway is
receiving datagrams more quickly than it can process them.
When the NonStop TCP/IPv6 subsystem receives this message, it reduces the rate
at which it is sending datagrams by implementing a slow start. To implement a slow
start, the NonStop TCP/IPv6 subsystem first stops sending datagrams, then
restarts sending them, and gradually increases the number of datagrams sent.
If the NonStop TCP/IPv6 subsystem is doing a lot of retransmissions, you should
check to see if Source Quench messages are being received. If they are, you
should reduce the number of packets being transmitted by your applications.
In Time Exceeded
is the number of Time Exceeded (type 11) messages received. A gateway sends
this message to notify the NonStop TCP/IPv6 subsystem (functioning as a source
host) that the “time-to-live” field is 0 and that the gateway discarded the datagram.
A destination host sends this message if the host cannot reassemble a fragmented
datagram within the time limit because fragments are missing. The destination host
then discards the datagram. When a Time Exceeded message is received, you
should check for routing loops.
In Timestamp
is the number of Timestamp (type 13) messages received. A host or gateway
sends this message to indicate the last time it handled the message before
sending it.
In Timestamp Reply
is the number of Timestamp Reply (type 14) messages received. A host or
gateway sends this message in reply to a Timestamp message. This message
indicates the time in the original Timestamp message and the time at which the
Timestamp message was received by the destination. The Timestamp facility is
used to obtain the network time. Special applications can be written to use this
facility.