Command Reference Guide

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TCP statistics
Command: /stats/l3/tcp
TCP statistics:
tcpRtoAlgorithm: 4 tcpRtoMin: 0
tcpRtoMax: 240000 tcpMaxConn: 2048
tcpActiveOpens: 0 tcpPassiveOpens: 0
tcpAttemptFails: 0 tcpEstabResets: 0
tcpInSegs: 0 tcpOutSegs: 0
tcpRetransSegs: 0 tcpInErrs: 0
tcpCurrEstab: 0 tcpCurConn: 5
tcpOutRsts: 0
The following table describes the Transmission Control Protocol (TCP) statistics:
Table 62 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. More refined semantics for objects of this
type depend upon the algorithm used to determine the retransmission
timeout. In particular, when the timeout algorithm is rsre(3), an object of this
type has the semantics of the LBOUND quantity described in Request For
Comments (RFC) 793.
tcpRtoMax
The maximum value permitted by a TCP implementation for the
retransmission timeout, measured in milliseconds. More refined semantics for
objects of this type depend upon the algorithm used to determine the
retransmission timeout. In particular, when the timeout algorithm is rsre(3), an
object of this type has the semantics of the UBOUND quantity described in
RFC 793.
tcpMaxConn
The limit on the total number of TCP connections the switch can support.
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.
tcpCurConn
The total number of outstanding TCP sessions that are currently opened.
tcpOutRsts
The number of TCP segments sent containing the reset (RST) flag.