TCP/IP Management Programming Manual

Commands and Responses
HP NonStop TCP/IP Management Programming Manual—529636-001
6-80
STATISTICS Command
ZSPI-TKN-DATALIST
indicates the beginning of a data list. The ZSPI-TKN-MAXRESP token must have a
value other than zero for data lists to be included in the response. For more details,
see SPI Standard Definitions on page 5-1.
ZTCI-MAP-TCP-STATS
is the extensible structured token that lists the statistics counters maintained for the
TCP Layer during the sample period. These statistics are returned only for the
PROC object. This token has the token number ZTCI-TNM-TCP-STATS and the
DDL definition ZTCI-DDL-TCP-STATS.
Each counter is defined in a separate field. The fields in the
ZTCI-MAP-TCP-STATS token are:
ZSTATS-TCP-BAD-XSUM
is the number of packets with an invalid checksum value received by the TCP
Layer of the TCP/IP subsystem during the sample period. An invalid checksum
is usually caused by a noisy link.
ZSTATS-TCP-BAD-OFF
is the number of packets received by the TCP Layer of the TCP/IP subsystem
during the sample period with an invalid data offset in the TCP header. An
invalid data offset usually indicates that either the sender of the packet made
an internal error in generating the packet or that the receiver of the packet had
a byte-swapping problem. This error is very rare; it is usually seen only during
protocol development.
ZSTATS-TCP-BAD-HDR-LEN
is the number of packets with an invalid header size received by the TCP Layer
of the TCP/IP subsystem during the sample period. This error is very rare; it
usually indicates a problem between IP and TCP.
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.