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PASSEDserver / nic_errors
NIC Errors — Bad SFP Causing Packet Loss on Production Server
A production server's 10G SFP is failing, causing CRC errors and packet drops on the network interface. Applications experience intermittent connectivity and retransmissions.
Pattern
NIC_ERRORS
Severity
CRITICAL
Confidence
85%
Remediation
Remote Hands
Test Results
| Metric | Expected | Actual | Result |
|---|---|---|---|
| Pattern Recognition | NIC_ERRORS | NIC_ERRORS | |
| Severity Assessment | CRITICAL | CRITICAL | |
| Incident Correlation | Yes | 5 linked | |
| Cascade Escalation | N/A | No | |
| Remediation | — | Remote Hands — Corax contacts on-site support via call, email, or API |
Scenario Conditions
Production server with Intel X710 10G NIC. SFP+ module showing elevated CRC errors (500/sec). Packet drop rate: 2%. Applications seeing TCP retransmissions.
Injected Error Messages (1)
NIC errors on Prod-Server-03 eth0 — CRC error rate 500/sec, frame errors detected, packet drop rate 2.1%, ring buffer overflow events, tx/rx error counters incrementing rapidly, network interface degraded
Neural Engine Root Cause Analysis
The network interface card (NIC) eth0 on Prod-Server-03 is experiencing severe hardware or driver-level degradation, evidenced by high CRC error rates (500/sec), frame errors, 2.1% packet drop rate, and ring buffer overflows. This pattern strongly indicates either faulty network hardware, damaged cabling, duplex/speed mismatches with the switch port, or corrupted NIC drivers. The 3 correlated incidents within the same timeframe suggest either a shared network infrastructure problem affecting multiple systems or cascading failures due to this server's network instability impacting dependent services.
Remediation Plan
1. Immediately run comprehensive network diagnostics to capture current error statistics and interface configuration. 2. Check physical cable connections and swap network cable if possible. 3. Verify switch port health and configuration (speed/duplex settings). 4. Reset network interface and reload NIC drivers. 5. If errors persist, replace network cable and coordinate NIC hardware replacement. 6. Monitor correlated systems to determine if this is affecting other infrastructure components. 7. Consider temporary traffic rerouting if redundant network paths are available.
Tested: 2026-03-30Monitors: 1 | Incidents: 1Test ID: cmncjfp4z010robqejg3c648i