TCP/IP (Parallel Library) Configuration and Management Manual

SCF Reference for Parallel Library TCP/IP
HP NonStop TCP/IP (Parallel Library) Configuration and Management Manual—522271-006
5-100
STATS PROCESS Command for TCPSAM
Description of Statistics for the TCP Layer (in Alphabetical Order)
ACK Bytes Received
is the number of ACK bytes acknowledged by received ACKs.
ACK Packets Received
is the number of ACK packets received.
ACK Packets Sent
is the number of ACK packets sent.
ACK Predictions OK
is the number of times the header predictions were correct for ACKs.
Bad Checksum
is the number of packets received with invalid checksum values.
Bad Offset
is the number of packets received with invalid data offsets in their TCP headers. An
invalid data offset usually indicates that either the sender of the packet made an
internal error in generating the packet, or the receiver of the packet had a byte-
swapping problem. This error is rare and is usually seen only during the
development of the protocol.
Bad Segment Size
is the number of packets received with invalid segment sizes.
Bytes Recv After Win
is the number of bytes received exceeding the window boundary.
Conn Dropped Timeouts
is the number of connections dropped in a transmit timeout.
Connection Timeouts
is the number of connections (including partial connections) that timed out.
A connection timeout is recorded each time the keep-alive timer or retransmission
timer expires. The keep-alive timer expires when the connection is inactive for a
certain period of time. The inactivity can be caused by a lost connection or by
network congestion. The retransmission timer expires when a packet is not
acknowledged within a certain time.
Packet retransmission can be caused by any of the following conditions: the
network is overloaded; the other end of the connection is overloaded (so that