TCP-ESTATS-MIB Table View

This table contains information about TCP Listeners,
in addition to the information maintained by the
tcpListenerTable RFC 4022.

tcpEStatsListenerEntry row .1.3.6.1.2.1.156.1.1.1.1

Each entry in the table contains information about
a specific TCP Listener.

Indexes

No indexes recorded

Column	Syntax	OID
tcpEStatsListenerStartTime The value of sysUpTime at the time this listener was established. If the current state was entered prior to the last re-initialization of the local network management subsystem, then this object contains a zero value.	SNMPv2-TCTimeStamp Based On: SNMPv2-SMITimeTicks Description: The value of the sysUpTime object at which a specific occurrence happened. The specific occurrence must be defined in the description of any object defined using this type. If sysUpTime is reset t…	.1.3.6.1.2.1.156.1.1.1.1.1
tcpEStatsListenerSynRcvd The number of SYNs which have been received for this listener. The total number of failed connections for all reasons can be estimated to be tcpEStatsListenerSynRcvd minus tcpEStatsListenerAccepted and tcpEStatsListene…	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.1.1.2
tcpEStatsListenerInitial The total number of connections for which the Listener has allocated initial state and placed the connection in the backlog. This may happen in the SYN-RCVD or ESTABLISHED states, depending on the implementation.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.1.1.3
tcpEStatsListenerEstablished The number of connections that have been established to this endpoint (e.g., the number of first ACKs that have been received for this listener).	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.1.1.4
tcpEStatsListenerAccepted The total number of connections for which the Listener has successfully issued an accept, removing the connection from the backlog.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.1.1.5
tcpEStatsListenerExceedBacklog The total number of connections dropped from the backlog by this listener due to all reasons. This includes all connections that are allocated initial resources, but are not accepted for some reason.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.1.1.6
tcpEStatsListenerHCSynRcvd The number of SYNs that have been received for this listener on systems that can process (or reject) more than 1 million connections per second. See tcpEStatsListenerSynRcvd.	HCNUM-TCZeroBasedCounter64	.1.3.6.1.2.1.156.1.1.1.1.7
tcpEStatsListenerHCInitial The total number of connections for which the Listener has allocated initial state and placed the connection in the backlog on systems that can process (or reject) more than 1 million connections per second. See tcpESt…	HCNUM-TCZeroBasedCounter64	.1.3.6.1.2.1.156.1.1.1.1.8
tcpEStatsListenerHCEstablished The number of connections that have been established to this endpoint on systems that can process (or reject) more than 1 million connections per second. See tcpEStatsListenerEstablished.	HCNUM-TCZeroBasedCounter64	.1.3.6.1.2.1.156.1.1.1.1.9
tcpEStatsListenerHCAccepted The total number of connections for which the Listener has successfully issued an accept, removing the connection from the backlog on systems that can process (or reject) more than 1 million connections per second. See…	HCNUM-TCZeroBasedCounter64	.1.3.6.1.2.1.156.1.1.1.1.10
tcpEStatsListenerHCExceedBacklog The total number of connections dropped from the backlog by this listener due to all reasons on systems that can process (or reject) more than 1 million connections per second. See tcpEStatsListenerExceedBacklog.	HCNUM-TCZeroBasedCounter64	.1.3.6.1.2.1.156.1.1.1.1.11
tcpEStatsListenerCurConns The current number of connections in the ESTABLISHED state, which have also been accepted. It excludes connections that have been established but not accepted because they are still subject to being discarded to shed l…	SNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.1.1.12
tcpEStatsListenerMaxBacklog The maximum number of connections allowed in the backlog at one time.	SNMPv2-SMIUnsigned32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.1.1.13
tcpEStatsListenerCurBacklog The current number of connections that are in the backlog. This gauge includes connections in ESTABLISHED or SYN-RECEIVED states for which the Listener has not yet issued an accept. If this listener is us…	SNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.1.1.14
tcpEStatsListenerCurEstabBacklog The current number of connections in the backlog that are in the ESTABLISHED state, but for which the Listener has not yet issued an accept.	SNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.1.1.15

This table maps information that uniquely identifies
each active TCP connection to the connection ID used by
          
other tables in this MIB Module.  It is an extension of
tcpConnectionTable in RFC 4022.
          
Entries are retained in this table for the number of
seconds indicated by the tcpEStatsConnTableLatency
object, after the TCP connection first enters the closed
state.

tcpEStatsConnectIdEntry row .1.3.6.1.2.1.156.1.1.2.1

Each entry in this table maps a TCP connection
4-tuple to a connection index.

Indexes

No indexes recorded

Column	Syntax	OID
tcpEStatsConnectIndex A unique integer value assigned to each TCP Connection entry. The RECOMMENDED algorithm is to begin at 1 and increase to some implementation-specific maximum value and then start again at 1 skipping value…	Unsigned32 Constraints: range: 1-4294967295	.1.3.6.1.2.1.156.1.1.2.1.1

This table contains objects that are useful for
          
measuring TCP performance and first line problem
diagnosis.  Most objects in this table directly expose
some TCP state variable or are easily implemented as
simple functions (e.g., the maximum value) of TCP
state variables.
          
Entries are retained in this table for the number of
seconds indicated by the tcpEStatsConnTableLatency
object, after the TCP connection first enters the closed
state.

tcpEStatsPerfEntry row .1.3.6.1.2.1.156.1.1.3.1

Each entry in this table has information about the
characteristics of each active and recently closed TCP
connection.

Indexes

tcpEStatsConnectIndex

Column	Syntax	OID
tcpEStatsPerfSegsOut The total number of segments sent.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.1
tcpEStatsPerfDataSegsOut The number of segments sent containing a positive length data segment.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.2
tcpEStatsPerfDataOctetsOut The number of octets of data contained in transmitted segments, including retransmitted data. Note that this does not include TCP headers.	octetsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.3
tcpEStatsPerfHCDataOctetsOut The number of octets of data contained in transmitted segments, including retransmitted data, on systems that can transmit more than 10 million bits per second. Note that this does not include TCP headers.	octetsHCNUM-TCZeroBasedCounter64	.1.3.6.1.2.1.156.1.1.3.1.4
tcpEStatsPerfSegsRetrans The number of segments transmitted containing at least some retransmitted data.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.5
tcpEStatsPerfOctetsRetrans The number of octets retransmitted.	octetsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.6
tcpEStatsPerfSegsIn The total number of segments received.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.7
tcpEStatsPerfDataSegsIn The number of segments received containing a positive length data segment.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.8
tcpEStatsPerfDataOctetsIn The number of octets contained in received data segments, including retransmitted data. Note that this does not include TCP headers.	octetsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.9
tcpEStatsPerfHCDataOctetsIn The number of octets contained in received data segments, including retransmitted data, on systems that can receive more than 10 million bits per second. Note that this does not include TCP headers.	octetsHCNUM-TCZeroBasedCounter64	.1.3.6.1.2.1.156.1.1.3.1.10
tcpEStatsPerfElapsedSecs The seconds part of the time elapsed between tcpEStatsPerfStartTimeStamp and the most recent protocol event (segment sent or received).	secondsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.11
tcpEStatsPerfElapsedMicroSecs The micro-second part of time elapsed between tcpEStatsPerfStartTimeStamp to the most recent protocol event (segment sent or received). This may be updated in whatever time granularity is the system supports.	microsecondsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.12
tcpEStatsPerfStartTimeStamp Time at which this row was created and all ZeroBasedCounters in the row were initialized to zero.	SNMPv2-TCDateAndTime Type Constraints: range: 8 range: 11 Description: A date-time specification. field octets contents range ----- ------ -------- ----- 1 1-2 year* 0..65536 2 3 month …	.1.3.6.1.2.1.156.1.1.3.1.13
tcpEStatsPerfCurMSS The current maximum segment size (MSS), in octets.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.3.1.14
tcpEStatsPerfPipeSize The TCP senders current estimate of the number of unacknowledged data octets in the network. While not in recovery (e.g., while the receiver is not reporting missing data to the sender), this is precisely…	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.3.1.15
tcpEStatsPerfMaxPipeSize The maximum value of tcpEStatsPerfPipeSize, for this connection.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.3.1.16
tcpEStatsPerfSmoothedRTT The smoothed round trip time used in calculation of the RTO. See SRTT in [RFC2988].	millisecondsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.3.1.17
tcpEStatsPerfCurRTO The current value of the retransmit timer RTO.	millisecondsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.3.1.18
tcpEStatsPerfCongSignals The number of multiplicative downward congestion window adjustments due to all forms of congestion signals, including Fast Retransmit, Explicit Congestion Notification (ECN), and timeouts. This object summarizes all ev…	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.19
tcpEStatsPerfCurCwnd The current congestion window, in octets.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.3.1.20
tcpEStatsPerfCurSsthresh The current slow start threshold in octets.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.3.1.21
tcpEStatsPerfTimeouts The number of times the retransmit timeout has expired when the RTO backoff multiplier is equal to one.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.22
tcpEStatsPerfCurRwinSent The most recent window advertisement sent, in octets.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.3.1.23
tcpEStatsPerfMaxRwinSent The maximum window advertisement sent, in octets.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.3.1.24
tcpEStatsPerfZeroRwinSent The number of acknowledgments sent announcing a zero receive window, when the previously announced window was not zero.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.25
tcpEStatsPerfCurRwinRcvd The most recent window advertisement received, in octets.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.3.1.26
tcpEStatsPerfMaxRwinRcvd The maximum window advertisement received, in octets.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.3.1.27
tcpEStatsPerfZeroRwinRcvd The number of acknowledgments received announcing a zero receive window, when the previously announced window was not zero.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.28
tcpEStatsPerfSndLimTransRwin The number of transitions into the 'Receiver Limited' state from either the 'Congestion Limited' or 'Sender Limited' states. This state is entered whenever TCP transmission stops because the sender has filled the annou…	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.31
tcpEStatsPerfSndLimTransCwnd The number of transitions into the 'Congestion Limited' state from either the 'Receiver Limited' or 'Sender Limited' states. This state is entered whenever TCP transmission stops because the sender has reached some lim…	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.32
tcpEStatsPerfSndLimTransSnd The number of transitions into the 'Sender Limited' state from either the 'Receiver Limited' or 'Congestion Limited' states. This state is entered whenever TCP transmission stops due to some sender limit such as runnin…	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.33
tcpEStatsPerfSndLimTimeRwin The cumulative time spent in the 'Receiver Limited' state. See tcpEStatsPerfSndLimTransRwin.	millisecondsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.34
tcpEStatsPerfSndLimTimeCwnd The cumulative time spent in the 'Congestion Limited' state. See tcpEStatsPerfSndLimTransCwnd. When there is a retransmission timeout, it SHOULD be counted in tcpEStatsPerfSndLimTimeCwnd (and not the cumulative time f…	millisecondsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.35
tcpEStatsPerfSndLimTimeSnd The cumulative time spent in the 'Sender Limited' state. See tcpEStatsPerfSndLimTransSnd.	millisecondsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.3.1.36

This table contains objects that can be used to infer
detailed behavior of the Internet path, such as the
extent that there is reordering, ECN bits, and if
RTT fluctuations are correlated to losses.
          
Entries are retained in this table for the number of
seconds indicated by the tcpEStatsConnTableLatency
object, after the TCP connection first enters the closed
state.

tcpEStatsPathEntry row .1.3.6.1.2.1.156.1.1.4.1

Each entry in this table has information about the
characteristics of each active and recently closed TCP
connection.

Indexes

tcpEStatsConnectIndex

Column	Syntax	OID
tcpEStatsPathRetranThresh The number of duplicate acknowledgments required to trigger Fast Retransmit. Note that although this is constant in traditional Reno TCP implementations, it is adaptive in many newer TCPs.	SNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.4.1.1
tcpEStatsPathNonRecovDAEpisodes The number of duplicate acknowledgment episodes that did not trigger a Fast Retransmit because ACK advanced prior to the number of duplicate acknowledgments reaching RetranThresh. In many implementations …	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.4.1.2
tcpEStatsPathSumOctetsReordered The sum of the amounts SND.UNA advances on the acknowledgment which ends a dup-ack episode without a retransmission. Note the change in tcpEStatsPathSumOctetsReordered divided by the change in tcpEStatsPa…	octetsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.4.1.3
tcpEStatsPathNonRecovDA Duplicate acks (or SACKS) that did not trigger a Fast Retransmit because ACK advanced prior to the number of duplicate acknowledgments reaching RetranThresh. In many implementations, this is the sum of th…	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.4.1.4
tcpEStatsPathSampleRTT The most recent raw round trip time measurement used in calculation of the RTO.	millisecondsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.4.1.11
tcpEStatsPathRTTVar The round trip time variation used in calculation of the RTO. See RTTVAR in [RFC2988].	millisecondsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.4.1.12
tcpEStatsPathMaxRTT The maximum sampled round trip time.	millisecondsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.4.1.13
tcpEStatsPathMinRTT The minimum sampled round trip time.	millisecondsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.4.1.14
tcpEStatsPathSumRTT The sum of all sampled round trip times. Note that the change in tcpEStatsPathSumRTT divided by the change in tcpEStatsPathCountRTT is the mean RTT, uniformly averaged over an enter interval.	millisecondsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.4.1.15
tcpEStatsPathHCSumRTT The sum of all sampled round trip times, on all systems that implement multiple concurrent RTT measurements. Note that the change in tcpEStatsPathHCSumRTT divided by the change in tcpEStatsPathCountRTT is…	millisecondsHCNUM-TCZeroBasedCounter64	.1.3.6.1.2.1.156.1.1.4.1.16
tcpEStatsPathCountRTT The number of round trip time samples included in tcpEStatsPathSumRTT and tcpEStatsPathHCSumRTT.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.4.1.17
tcpEStatsPathMaxRTO The maximum value of the retransmit timer RTO.	millisecondsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.4.1.18
tcpEStatsPathMinRTO The minimum value of the retransmit timer RTO.	millisecondsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.4.1.19
tcpEStatsPathIpTtl The value of the TTL field carried in the most recently received IP header. This is sometimes useful to detect changing or unstable routes.	SNMPv2-SMIUnsigned32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.4.1.20
tcpEStatsPathIpTosIn The value of the IPv4 Type of Service octet, or the IPv6 traffic class octet, carried in the most recently received IP header. This is useful to diagnose interactions between TCP and any IP layer packet s…	OctetString Constraints: range: 1-1	.1.3.6.1.2.1.156.1.1.4.1.21
tcpEStatsPathIpTosOut The value of the IPv4 Type Of Service octet, or the IPv6 traffic class octet, carried in the most recently transmitted IP header. This is useful to diagnose interactions between TCP and any IP layer packe…	OctetString Constraints: range: 1-1	.1.3.6.1.2.1.156.1.1.4.1.22
tcpEStatsPathPreCongSumCwnd The sum of the values of the congestion window, in octets, captured each time a congestion signal is received. This MUST be updated each time tcpEStatsPerfCongSignals is incremented, such that the change in tcpEStatsPa…	octetsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.4.1.23
tcpEStatsPathPreCongSumRTT Sum of the last sample of the RTT (tcpEStatsPathSampleRTT) prior to the received congestion signals. This MUST be updated each time tcpEStatsPerfCongSignals is incremented, such that the change in tcpEStatsPathPreCongS…	millisecondsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.4.1.24
tcpEStatsPathPostCongSumRTT Sum of the first sample of the RTT (tcpEStatsPathSampleRTT) following each congestion signal. Such that the change in tcpEStatsPathPostCongSumRTT divided by the change in tcpEStatsPathPostCongCountRTT is the average RT…	octetsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.4.1.25
tcpEStatsPathPostCongCountRTT The number of RTT samples included in tcpEStatsPathPostCongSumRTT such that the change in tcpEStatsPathPostCongSumRTT divided by the change in tcpEStatsPathPostCongCountRTT is the average RTT (over some interval) just a…	millisecondsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.4.1.26
tcpEStatsPathECNsignals The number of congestion signals delivered to the TCP sender via explicit congestion notification (ECN). This is typically the number of segments bearing Echo Congestion Experienced (ECE) bits, but shoul…	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.4.1.27
tcpEStatsPathDupAckEpisodes The number of Duplicate Acks Sent when prior Ack was not duplicate. This is the number of times that a contiguous series of duplicate acknowledgments have been sent. This is an indication of the number o…	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.4.1.28
tcpEStatsPathRcvRTT The receiver's estimate of the Path RTT. Adaptive receiver window algorithms depend on the receiver to having a good estimate of the path RTT.	SNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.4.1.29
tcpEStatsPathDupAcksOut The number of duplicate ACKs sent. The ratio of the change in tcpEStatsPathDupAcksOut to the change in tcpEStatsPathDupAckEpisodes is an indication of reorder or recovery distance over some interval.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.4.1.30
tcpEStatsPathCERcvd The number of segments received with IP headers bearing Congestion Experienced (CE) markings.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.4.1.31
tcpEStatsPathECESent Number of times the Echo Congestion Experienced (ECE) bit in the TCP header has been set (transitioned from 0 to 1), due to a Congestion Experienced (CE) marking on an IP header. Note that ECE can be set and reset only…	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.4.1.32

This table contains objects that are most useful for
determining how well some of the TCP control
algorithms are coping with this particular
          
path.
          
Entries are retained in this table for the number of
seconds indicated by the tcpEStatsConnTableLatency
object, after the TCP connection first enters the closed
state.

tcpEStatsStackEntry row .1.3.6.1.2.1.156.1.1.5.1

Each entry in this table has information about the
characteristics of each active and recently closed TCP
connection.

Indexes

tcpEStatsConnectIndex

Column	Syntax	OID
tcpEStatsStackActiveOpen True(1) if the local connection traversed the SYN-SENT state, else false(2).	SNMPv2-TCTruthValue Type Values: 1 true 2 false Description: Represents a boolean value.	.1.3.6.1.2.1.156.1.1.5.1.1
tcpEStatsStackMSSSent The value sent in an MSS option, or zero if none.	SNMPv2-SMIUnsigned32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.2
tcpEStatsStackMSSRcvd The value received in an MSS option, or zero if none.	SNMPv2-SMIUnsigned32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.3
tcpEStatsStackWinScaleSent The value of the transmitted window scale option if one was sent; otherwise, a value of -1. Note that if both tcpEStatsStackWinScaleSent and tcpEStatsStackWinScaleRcvd are not -1, then Rcv.Wind.Scale will…	Integer32 Constraints: range: -1-14	.1.3.6.1.2.1.156.1.1.5.1.4
tcpEStatsStackWinScaleRcvd The value of the received window scale option if one was received; otherwise, a value of -1. Note that if both tcpEStatsStackWinScaleSent and tcpEStatsStackWinScaleRcvd are not -1, then Snd.Wind.Scale wil…	Integer32 Constraints: range: -1-14	.1.3.6.1.2.1.156.1.1.5.1.5
tcpEStatsStackTimeStamps Enabled(1) if TCP timestamps have been negotiated on, selfDisabled(2) if they are disabled or not implemented on the local host, or peerDisabled(3) if not negotiated by the remote hosts.	TcpEStatsNegotiated Type Values: 1 enabled 2 selfDisabled 3 peerDisabled	.1.3.6.1.2.1.156.1.1.5.1.6
tcpEStatsStackECN Enabled(1) if Explicit Congestion Notification (ECN) has been negotiated on, selfDisabled(2) if it is disabled or not implemented on the local host, or peerDisabled(3) if not negotiated by the remote hosts.	TcpEStatsNegotiated Type Values: 1 enabled 2 selfDisabled 3 peerDisabled	.1.3.6.1.2.1.156.1.1.5.1.7
tcpEStatsStackWillSendSACK Enabled(1) if the local host will send SACK options, selfDisabled(2) if SACK is disabled or not implemented on the local host, or peerDisabled(3) if the remote host did not send the SACK-permitted option. …	TcpEStatsNegotiated Type Values: 1 enabled 2 selfDisabled 3 peerDisabled	.1.3.6.1.2.1.156.1.1.5.1.8
tcpEStatsStackWillUseSACK Enabled(1) if the local host will process SACK options, selfDisabled(2) if SACK is disabled or not implemented on the local host, or peerDisabled(3) if the remote host sends duplicate ACKs without SACK op…	TcpEStatsNegotiated Type Values: 1 enabled 2 selfDisabled 3 peerDisabled	.1.3.6.1.2.1.156.1.1.5.1.9
tcpEStatsStackState An integer value representing the connection state from the TCP State Transition Diagram. The value listen(2) is included only for parallelism to the old tcpConnTable, and SHOULD NOT be used because the l…	Enumeration Enumerated Values: 1 tcpESStateClosed 2 tcpESStateListen 3 tcpESStateSynSent 4 tcpESStateSynReceived 5 tcpESStateEstablished 6 tcpESStateFinWait1 7 tcpESStateFinWait2 8 tcpESStateCloseWait 9 tcpESStateLastAck 10 tcpESStateClosing 11 tcpESStateTimeWait 12 tcpESStateDeleteTcb	.1.3.6.1.2.1.156.1.1.5.1.10
tcpEStatsStackNagle True(1) if the Nagle algorithm is being used, else false(2).	SNMPv2-TCTruthValue Type Values: 1 true 2 false Description: Represents a boolean value.	.1.3.6.1.2.1.156.1.1.5.1.11
tcpEStatsStackMaxSsCwnd The maximum congestion window used during Slow Start, in octets.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.12
tcpEStatsStackMaxCaCwnd The maximum congestion window used during Congestion Avoidance, in octets.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.13
tcpEStatsStackMaxSsthresh The maximum slow start threshold, excluding the initial value.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.14
tcpEStatsStackMinSsthresh The minimum slow start threshold.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.15
tcpEStatsStackInRecovery An integer value representing the state of the loss recovery for this connection. tcpESDataContiguous(1) indicates that the remote receiver is reporting contiguous data (no duplicate acknowledgments or SA…	Enumeration Enumerated Values: 1 tcpESDataContiguous 2 tcpESDataUnordered 3 tcpESDataRecovery	.1.3.6.1.2.1.156.1.1.5.1.16
tcpEStatsStackDupAcksIn The number of duplicate ACKs received.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.17
tcpEStatsStackSpuriousFrDetected The number of acknowledgments reporting out-of-order segments after the Fast Retransmit algorithm has already retransmitted the segments. (For example as detected by the Eifel algorithm).'	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.18
tcpEStatsStackSpuriousRtoDetected The number of acknowledgments reporting segments that have already been retransmitted due to a Retransmission Timeout.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.19
tcpEStatsStackSoftErrors The number of segments that fail various consistency tests during TCP input processing. Soft errors might cause the segment to be discarded but some do not. Some of these soft errors cause the generation of a TCP ackn…	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.21
tcpEStatsStackSoftErrorReason This object identifies which consistency test most recently failed during TCP input processing. This object SHOULD be set every time tcpEStatsStackSoftErrors is incremented. The codes are as follows: be…	Enumeration Enumerated Values: 1 belowDataWindow 2 aboveDataWindow 3 belowAckWindow 4 aboveAckWindow 5 belowTSWindow 6 aboveTSWindow 7 dataCheckSum 8 otherSoftError	.1.3.6.1.2.1.156.1.1.5.1.22
tcpEStatsStackSlowStart The number of times the congestion window has been increased by the Slow Start algorithm.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.23
tcpEStatsStackCongAvoid The number of times the congestion window has been increased by the Congestion Avoidance algorithm.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.24
tcpEStatsStackOtherReductions The number of congestion window reductions made as a result of anything other than AIMD congestion control algorithms. Examples of non-multiplicative window reductions include Congestion Window Validation [RFC2861] and …	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.25
tcpEStatsStackCongOverCount The number of congestion events that were 'backed out' of the congestion control state machine such that the congestion window was restored to a prior value. This can happen due to the Eifel algorithm [RFC3522] or othe…	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.26
tcpEStatsStackFastRetran The number of invocations of the Fast Retransmit algorithm.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.27
tcpEStatsStackSubsequentTimeouts The number of times the retransmit timeout has expired after the RTO has been doubled. See Section 5.5 of RFC 2988.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.28
tcpEStatsStackCurTimeoutCount The current number of times the retransmit timeout has expired without receiving an acknowledgment for new data. tcpEStatsStackCurTimeoutCount is reset to zero when new data is acknowledged and incremented for each invo…	SNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.29
tcpEStatsStackAbruptTimeouts The number of timeouts that occurred without any immediately preceding duplicate acknowledgments or other indications of congestion. Abrupt Timeouts indicate that the path lost an entire window of data or acknowledgmen…	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.30
tcpEStatsStackSACKsRcvd The number of SACK options received.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.31
tcpEStatsStackSACKBlocksRcvd The number of SACK blocks received (within SACK options).	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.32
tcpEStatsStackSendStall The number of interface stalls or other sender local resource limitations that are treated as congestion signals.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.33
tcpEStatsStackDSACKDups The number of duplicate segments reported to the local host by D-SACK blocks.	RMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.5.1.34
tcpEStatsStackMaxMSS The maximum MSS, in octets.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.35
tcpEStatsStackMinMSS The minimum MSS, in octets.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.36
tcpEStatsStackSndInitial Initial send sequence number. Note that by definition tcpEStatsStackSndInitial never changes for a given connection.	SNMPv2-SMIUnsigned32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.37
tcpEStatsStackRecInitial Initial receive sequence number. Note that by definition tcpEStatsStackRecInitial never changes for a given connection.	SNMPv2-SMIUnsigned32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.38
tcpEStatsStackCurRetxQueue The current number of octets of data occupying the retransmit queue.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.39
tcpEStatsStackMaxRetxQueue The maximum number of octets of data occupying the retransmit queue.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.40
tcpEStatsStackCurReasmQueue The current number of octets of sequence space spanned by the reassembly queue. This is generally the difference between rcv.nxt and the sequence number of the right most edge of the reassembly queue.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.41
tcpEStatsStackMaxReasmQueue The maximum value of tcpEStatsStackCurReasmQueue	SNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.5.1.42

This table contains objects that are useful for
determining if the application using TCP is
          
limiting TCP performance.
          
Entries are retained in this table for the number of
seconds indicated by the tcpEStatsConnTableLatency
object, after the TCP connection first enters the closed
state.

tcpEStatsAppEntry row .1.3.6.1.2.1.156.1.1.6.1

Each entry in this table has information about the
characteristics of each active and recently closed TCP
connection.

Indexes

tcpEStatsConnectIndex

Column	Syntax	OID
tcpEStatsAppSndUna The value of SND.UNA, the oldest unacknowledged sequence number. Note that SND.UNA is a TCP state variable that is congruent to Counter32 semantics.	SNMPv2-SMICounter32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.6.1.1
tcpEStatsAppSndNxt The value of SND.NXT, the next sequence number to be sent. Note that tcpEStatsAppSndNxt is not monotonic (and thus not a counter) because TCP sometimes retransmits lost data by pulling tcpEStatsAppSndNxt back to the mis…	SNMPv2-SMIUnsigned32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.6.1.2
tcpEStatsAppSndMax The farthest forward (right most or largest) SND.NXT value. Note that this will be equal to tcpEStatsAppSndNxt except when tcpEStatsAppSndNxt is pulled back during recovery.	SNMPv2-SMICounter32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.6.1.3
tcpEStatsAppThruOctetsAcked The number of octets for which cumulative acknowledgments have been received. Note that this will be the sum of changes to tcpEStatsAppSndUna.	octetsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.6.1.4
tcpEStatsAppHCThruOctetsAcked The number of octets for which cumulative acknowledgments have been received, on systems that can receive more than 10 million bits per second. Note that this will be the sum of changes in tcpEStatsAppSndUna.	octetsHCNUM-TCZeroBasedCounter64	.1.3.6.1.2.1.156.1.1.6.1.5
tcpEStatsAppRcvNxt The value of RCV.NXT. The next sequence number expected on an incoming segment, and the left or lower edge of the receive window. Note that RCV.NXT is a TCP state variable that is congruent to Counter32 …	SNMPv2-SMICounter32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.6.1.6
tcpEStatsAppThruOctetsReceived The number of octets for which cumulative acknowledgments have been sent. Note that this will be the sum of changes to tcpEStatsAppRcvNxt.	octetsRMON2-MIBZeroBasedCounter32	.1.3.6.1.2.1.156.1.1.6.1.7
tcpEStatsAppHCThruOctetsReceived The number of octets for which cumulative acknowledgments have been sent, on systems that can transmit more than 10 million bits per second. Note that this will be the sum of changes in tcpEStatsAppRcvNxt.	octetsHCNUM-TCZeroBasedCounter64	.1.3.6.1.2.1.156.1.1.6.1.8
tcpEStatsAppCurAppWQueue The current number of octets of application data buffered by TCP, pending first transmission, i.e., to the left of SND.NXT or SndMax. This data will generally be transmitted (and SND.NXT advanced to the left) as soon a…	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.6.1.11
tcpEStatsAppMaxAppWQueue The maximum number of octets of application data buffered by TCP, pending first transmission. This is the maximum value of tcpEStatsAppCurAppWQueue. This pair of objects can be used to determine if insufficient queued…	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.6.1.12
tcpEStatsAppCurAppRQueue The current number of octets of application data that has been acknowledged by TCP but not yet delivered to the application.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.6.1.13
tcpEStatsAppMaxAppRQueue The maximum number of octets of application data that has been acknowledged by TCP but not yet delivered to the application.	octetsSNMPv2-SMIGauge32 Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.6.1.14

This table contains per-connection controls that can
be used to work around a number of common problems that
plague TCP over some paths.  All can be characterized as
limiting the growth of the congestion window so as to
prevent TCP from overwhelming some component in the
path.
          
Entries are retained in this table for the number of
seconds indicated by the tcpEStatsConnTableLatency
object, after the TCP connection first enters the closed
state.

tcpEStatsTuneEntry row .1.3.6.1.2.1.156.1.1.7.1

Each entry in this table is a control that can be used to
place limits on each active TCP connection.

Indexes

tcpEStatsConnectIndex

Column	Syntax	OID
tcpEStatsTuneLimCwnd A control to set the maximum congestion window that may be used, in octets.	octetsSNMPv2-SMIUnsigned32r/w Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.7.1.1
tcpEStatsTuneLimSsthresh A control to limit the maximum queue space (in octets) that this TCP connection is likely to occupy during slowstart. It can be implemented with the algorithm described in RFC 3742 by setting the max_ssth…	octetsSNMPv2-SMIUnsigned32r/w Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.7.1.2
tcpEStatsTuneLimRwin A control to set the maximum window advertisement that may be sent, in octets.	octetsSNMPv2-SMIUnsigned32r/w Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.7.1.3
tcpEStatsTuneLimMSS A control to limit the maximum segment size in octets, that this TCP connection can use.	octetsSNMPv2-SMIUnsigned32r/w Type Constraints: range: 0..4294967295	.1.3.6.1.2.1.156.1.1.7.1.4