tcpEStatsPathRetranThresh
TCP-ESTATS-MIB ·
.1.3.6.1.2.1.156.1.1.4.1.1
Object
column
SNMPv2-SMIGauge32
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.
Context
- MIB
- TCP-ESTATS-MIB
- OID
.1.3.6.1.2.1.156.1.1.4.1.1- Type
- column
- Access
- readonly
- Status
- current
- Parent
- tcpEStatsPathEntry
- Table
- tcpEStatsPathTable
- Siblings
- 25
Syntax
SNMPv2-SMIGauge32
- Source
- SNMPv2-SMIGauge32
- Base type
Unsigned32
Values & Constraints
Type Constraints
range: 0..4294967295
Related Objects
Sibling Objects
| Object | Type | Syntax | OID |
|---|---|---|---|
| tcpEStatsPathSampleRTT The most recent raw round trip time measurement used in
calculation of the RTO. | column | milliseconds SNMPv2-SMIGauge32 | .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]. | column | milliseconds SNMPv2-SMIGauge32 | .1.3.6.1.2.1.156.1.1.4.1.12 |
| tcpEStatsPathMaxRTT The maximum sampled round trip time. | column | milliseconds SNMPv2-SMIGauge32 | .1.3.6.1.2.1.156.1.1.4.1.13 |
| tcpEStatsPathMinRTT The minimum sampled round trip time. | column | milliseconds SNMPv2-SMIGauge32 | .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
avera… | column | milliseconds RMON2-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 b… | column | milliseconds HCNUM-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. | column | RMON2-MIBZeroBasedCounter32 | .1.3.6.1.2.1.156.1.1.4.1.17 |
| tcpEStatsPathMaxRTO The maximum value of the retransmit timer RTO. | column | milliseconds SNMPv2-SMIGauge32 | .1.3.6.1.2.1.156.1.1.4.1.18 |
| tcpEStatsPathMinRTO The minimum value of the retransmit timer RTO. | column | milliseconds SNMPv2-SMIGauge32 | .1.3.6.1.2.1.156.1.1.4.1.19 |
| 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.… | column | RMON2-MIBZeroBasedCounter32 | .1.3.6.1.2.1.156.1.1.4.1.2 |
| 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. | column | SNMPv2-SMIUnsigned32 | .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 interactio… | column | OctetString | .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 interac… | column | OctetString | .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
incremen… | column | octets RMON2-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 … | column | milliseconds RMON2-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
tcpESta… | column | octets RMON2-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… | column | milliseconds RMON2-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
… | column | 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.
… | column | 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. | column | SNMPv2-SMIGauge32 | .1.3.6.1.2.1.156.1.1.4.1.29 |
| 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 tcpEStatsPathSumOctetsReorde… | column | octets RMON2-MIBZeroBasedCounter32 | .1.3.6.1.2.1.156.1.1.4.1.3 |
| 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 distanc… | column | 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. | column | 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. … | column | RMON2-MIBZeroBasedCounter32 | .1.3.6.1.2.1.156.1.1.4.1.32 |
| 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 man… | column | RMON2-MIBZeroBasedCounter32 | .1.3.6.1.2.1.156.1.1.4.1.4 |