All MIBs › TCP-ESTATS-MIB › tcpEStatsStackSoftErrorReason
tcpEStatsStackSoftErrorReason
Module: TCP-ESTATS-MIB
OID (symbolic): TCP-ESTATS-MIB::tcpEStatsStackSoftErrorReason
OID (numeric): 1.3.6.1.2.1.156.1.1.5.1.22
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-only
Description: 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:
belowDataWindow(1) - All data in the segment is below SND.UNA. (Normal for keep-alives and zero window probes).
aboveDataWindow(2) - Some data in the segment is above SND.WND. (Indicates an implementation bug or possible attack).
belowAckWindow(3) - ACK below SND.UNA. (Indicates that the return path is reordering ACKs)
aboveAckWindow(4) - An ACK for data that we have not sent. (Indicates an implementation bug or possible attack).
belowTSWindow(5) - TSecr on the segment is older than the current TS.Recent (Normal for the rare case where PAWS detects data reordered by the network).
aboveTSWindow(6) - TSecr on the segment is newer than the current TS.Recent. (Indicates an implementation bug or possible attack).
dataCheckSum(7) - Incorrect checksum. Note that this value is intrinsically fragile, because the header fields used to identify the connection may have been corrupted.
otherSoftError(8) - All other soft errors not listed above.
What is tcpEStatsStackSoftErrorReason?
Identifies which specific consistency check most recently failed and incremented tcpEStatsStackSoftErrors - e.g. belowDataWindow, normal for keepalives, aboveAckWindow, a possible bug or attack, or dataCheckSum, a checksum failure; an admin reads this alongside the counter to judge whether the soft errors are benign or a red flag.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.2.1.156.1.1.5.1.22 snmpwalk -v2c -c public <target> TCP-ESTATS-MIB::tcpEStatsStackSoftErrorReason
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.2.1.156.1.1.5.1.22.1 snmpget -v2c -c public <target> TCP-ESTATS-MIB::tcpEStatsStackSoftErrorReason.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 |
| 1.3.6.1.2.1.156.1.1.5 | tcpEStatsStackTable | TCP-ESTATS-MIB |
| 1.3.6.1.2.1.156.1.1.5.1 | tcpEStatsStackEntry | TCP-ESTATS-MIB |
| 1.3.6.1.2.1.156.1.1.5.1.22 | tcpEStatsStackSoftErrorReason | TCP-ESTATS-MIB |