TCP/IP Management Programming Manual

Commands and Responses
HP NonStop TCP/IP Management Programming Manual—529636-001
6-57
RESETSTATS Command
ZSTATS-TCP-BAD-SEGS
is the number of packets with an invalid segment size received by the TCP
Layer of the TCP/IP subsystem during the sample period. This field is reserved
for future use.
ZSTATS-TCP-NOT-ACK
is the number of packets, received by the TCP Layer of the TCP/IP subsystem
during the sample period, that the subsystem has not acknowledged. This field
is reserved for future use.
ZSTATS-TCP-REXMIT
is the number of packets retransmitted during the sample period. Packets are
retransmitted when they are not acknowledged within a certain time period.
The retransmission of packets can be caused by any of these conditions: the
network is overloaded, the other end of the connection is overloaded (so that
the appropriate acknowledgments cannot be received and/or sent), or a packet
is received that has been corrupted (that is, a packet with an invalid checksum
is received).
ZSTATS-TCP-TIMEOUT
is the number of TCP Layer connection timeouts that occurred during the
sample period. A connection timeout is recorded each time the keep-alive timer
or the retransmission timer expires.
The keep-alive timer expires when the connection is inactive for a designated
period of time. This inactivity can be caused by the other end of the connection
going down or by network congestion.
The retransmission timer expires when a packet is not acknowledged within a
certain time period.
ZSTATS-TCP-IN-CONN
is the number of incoming connection requests received by the TCP Layer of
the TCP/IP subsystem during the sample period.
ZSTATS-TCP-OUT-CONN
is the number of outgoing connection requests sent by the TCP Layer of the
TCP/IP subsystem during the sample period.
ZSTATS-TCP-IN-PKTS
is the number of incoming packets received by the TCP Layer of the TCP/IP
subsystem during the sample period.