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Configuring the Switch
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3
TCP Statistics
The Transmission Control Protocol (TCP) provides highly reliable host-to-host
connections in packet-switched networks, and is used in conjunction with IP to
support a wide variety of Internet protocols.
Web - Click IP, Statistics, TCP.
Figure 3-124 TCP Statistics
CLI - See the example on page 3-204.
Table 3-21 TCP Statistics
Parameter Description
Segments Received The total number of segments received, including those received in error.
This count includes segments received on currently established
connections.
Segments Sent The total number of segments sent, including those on current
connections but excluding those containing only retransmitted octets.
Active Opens The number of times TCP connections have made a direct transition to the
SYN-SENT state from the CLOSED state.
Failed Connection Attempts The number of times TCP connections have made a direct transition to the
CLOSED state from either the SYN-SENT state or the SYN-RCVD state,
plus the number of times TCP connections have made a direct transition
to the LISTEN state from the SYN-RCVD state.
Current Connections The number of TCP connections for which the current state is either
ESTABLISHED or CLOSE- WAIT.
Receive Errors The total number of segments received in error (e.g., bad TCP
checksums).
Segments Retransmitted The total number of segments retransmitted - that is, the number of TCP
segments transmitted containing one or more previously transmitted
octets.
Passive Opens The number of times TCP connections have made a direct transition to the
SYN-RCVD state from the LISTEN state.
Reset Connections The number of times TCP connections have made a direct transition to the
CLOSED state from either the ESTABLISHED state or the CLOSE-WAIT
state.