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PASSEDdatabase / nic_errors
Oracle Database 23c Packet Loss Due to NIC Errors on Windows Server 2019
Oracle Database 23c is experiencing intermittent connectivity issues caused by NIC errors on the host's network interface.
Pattern
NIC_ERRORS
Severity
MEDIUM
Confidence
64%
Remediation
Auto-Heal
Test Results
| Metric | Expected | Actual | Result |
|---|---|---|---|
| Pattern Recognition | NIC_ERRORS | NIC_ERRORS | |
| Severity Assessment | HIGH | MEDIUM | |
| Incident Correlation | N/A | None | |
| Cascade Escalation | N/A | No | |
| Remediation | — | Auto-Heal — Corax resolves autonomously |
Scenario Conditions
Windows Server 2019. Oracle Database 23c host NIC showing CRC and frame errors. Packet loss at 5%. Connections intermittently dropping.
Injected Error Messages (1)
Oracle Database 23c on Windows Server 2019 — nic error detected, crc error rate increasing, network interface errors causing 5% packet loss, oracle.exe connections intermittently dropping, frame error on eth0
Neural Engine Root Cause Analysis
Network interface errors detected — the NIC is experiencing CRC errors, frame errors, packet drops, or ring buffer overflows. These typically indicate physical layer issues (bad cable, failing NIC, duplex mismatch) or driver/firmware problems that are degrading network throughput and reliability.
Remediation Plan
1. Check interface error counters with 'ethtool -S <interface>' or 'ip -s link show'.
2. Inspect the physical cable connection and replace if CRC/frame errors are present.
3. Verify speed/duplex settings match on both ends — auto-negotiation failures cause many NIC errors.
4. Update NIC drivers and firmware to the latest stable version.
5. For ring buffer overflows, increase the ring buffer size with 'ethtool -G <interface> rx <size>'.
Improvements Applied
- Severity: MEDIUM (expected HIGH)
Tested: 2026-04-02Monitors: 1 | Incidents: 1Test ID: cmnhnwo3505yhlijg48wx1g50