All MIBs › ACC-IPSEC › accIpsecStatsSha1Mismatches
accIpsecStatsSha1Mismatches
Module: ACC-IPSEC
OID (symbolic): ACC-IPSEC::accIpsecStatsSha1Mismatches
OID (numeric): 1.3.6.1.4.1.5.1.1.81.2.12
Node type: OBJECT-TYPE
Type: Counter
Access: read-only
Description: Number of packets dropped because the SHA-1 authenticator was incorrect
What is accIpsecStatsSha1Mismatches?
ACC-IPSEC::accIpsecStatsSha1Mismatches counts inbound encrypted packets that were dropped because their SHA-1 authentication tag (HMAC) did not match when decrypted, meaning the packet was either corrupted or tampered with. You monitor this to detect either network corruption on the IPSec link or someone attempting to forge or replay encrypted traffic. For example, a steady low value of 1–2 per day might be normal packet loss, but 100 in an hour indicates a problem with your shared keys or the peer's encryption.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.5.1.1.81.2.12 snmpwalk -v2c -c public <target> ACC-IPSEC::accIpsecStatsSha1Mismatches
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.5.1.1.81.2.12.1 snmpget -v2c -c public <target> ACC-IPSEC::accIpsecStatsSha1Mismatches.1
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OID Breakdown
Upper-level ancestors (9 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 |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.5 | acc | ACC-MIB |
| 1.3.6.1.4.1.5.1 | accSBAR | ACC-MIB |
| 1.3.6.1.4.1.5.1.1 | accBRG | ACC-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.5.1.1.81 | accIpsec | ACC-IPSEC |
| 1.3.6.1.4.1.5.1.1.81.2 | accIpsecStats | ACC-IPSEC |
| 1.3.6.1.4.1.5.1.1.81.2.12 | accIpsecStatsSha1Mismatches | ACC-IPSEC |