All MIBs › TCP-ESTATS-MIB › tcpEStatsPathNonRecovDA
tcpEStatsPathNonRecovDA
Module: TCP-ESTATS-MIB
OID (symbolic): TCP-ESTATS-MIB::tcpEStatsPathNonRecovDA
OID (numeric): 1.3.6.1.2.1.156.1.1.4.1.4
Node type: OBJECT-TYPE
Type: ZeroBasedCounter32
Access: read-only
Description: 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 the 'dupacks' counter, just before it is set to zero because ACK advanced without a Fast Retransmit.
Note that the change in tcpEStatsPathNonRecovDA divided by the change in tcpEStatsPathNonRecovDAEpisodes is an estimate of the average reordering distance in segments over some interval.
What is tcpEStatsPathNonRecovDA?
Total duplicate ACKs (or SACKs) received that didn't trigger a Fast Retransmit because the cumulative ACK advanced first; dividing its change by tcpEStatsPathNonRecovDAEpisodes estimates the average reordering distance in segments.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.2.1.156.1.1.4.1.4 snmpwalk -v2c -c public <target> TCP-ESTATS-MIB::tcpEStatsPathNonRecovDA
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.2.1.156.1.1.4.1.4.1 snmpget -v2c -c public <target> TCP-ESTATS-MIB::tcpEStatsPathNonRecovDA.1
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OID Breakdown
Upper-level ancestors (6 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.2 | mgmt | APERTUS-NPG-MIB |
| 1.3.6.1.2.1 | mib_2 | AXON-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.2.1.156 | tcpEStatsMIB | TCP-ESTATS-MIB |
| 1.3.6.1.2.1.156.1 | tcpEStatsMIBObjects | TCP-ESTATS-MIB |
| 1.3.6.1.2.1.156.1.1 | tcpEStats | TCP-ESTATS-MIB |
| 1.3.6.1.2.1.156.1.1.4 | tcpEStatsPathTable | TCP-ESTATS-MIB |
| 1.3.6.1.2.1.156.1.1.4.1 | tcpEStatsPathEntry | TCP-ESTATS-MIB |
| 1.3.6.1.2.1.156.1.1.4.1.4 | tcpEStatsPathNonRecovDA | TCP-ESTATS-MIB |