Command Reference Guide

Error! Use the Home tab to apply 見出し 1 to the text that you want to appear here. 70
TCP statistics
The following command displays TCP statistics:
show ip tcp counters
Command mode: All
TCP statistics:
tcpRtoAlgorithm: 4 tcpRtoMin: 0
tcpRtoMax: 240000 tcpMaxConn: 2048
tcpActiveOpens: 252214 tcpPassiveOpens: 7
tcpAttemptFails: 528 tcpEstabResets: 4
tcpInSegs: 756401 tcpOutSegs: 756655
tcpRetransSegs: 0 tcpInErrs: 0
tcpCurrEstab: 0 tcpCurrConn: 3
tcpOutRsts: 417
The following table describes the Transmission Control Protocol (TCP) statistics:
Table 60 TCP statistics
Statistics
Description
tcpRtoAlgorithm
The algorithm used to determine the timeout value used for retransmitting
unacknowledged octets.
tcpRtoMin
The minimum value permitted by a TCP implementation for the retransmission
timeout, measured in milliseconds.
tcpRtoMax
The maximum value permitted by a TCP implementation for the
retransmission timeout, measured in milliseconds.
tcpMaxConn
The limit on the total number of TCP connections the switch can support. In
entities where the maximum number of connections is dynamic, this object
should contain the value -1.
tcpActiveOpens
The number of times TCP connections have made a direct transition to the
SYN-SENT state from the CLOSED state.
tcpPassiveOpens
The number of times TCP connections have made a direct transition to the
SYN-RCVD state from the LISTEN state.
tcpAttemptFails
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.
tcpEstabResets
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.
tcpInSegs
The total number of segments received, including those received in error. This
count includes segments received on currently established connections.
tcpOutSegs
The total number of segments sent, including those on current connections
but excluding those containing only retransmitted octets.
tcpRetransSegs
The total number of segments retransmitted, that is, the number of TCP
segments transmitted containing one or more previously transmitted octets.
tcpInErrs
The total number of segments received in error (for example, bad TCP
checksums).
tcpCurrEstab
The total number of outstanding memory allocations from heap by TCP
protocol stack.
tcpCurrConn
The total number of outstanding TCP sessions that are currently opened.
tcpOutRsts
The number of TCP segments sent containing the reset (RST) flag.