π ~1 min read
Table of contents
Symptom & Impact
Host boots without expected network connectivity.
Environment & Reproduction
Triggered by kernel/module updates or interface renaming conflicts.
Root Cause Analysis
Driver not loaded or /etc/network/interfaces references wrong device.
Quick Triage
Check ip link, dmesg, and current interface naming against config.
Step-by-Step Diagnosis
Correlate NIC PCI device, loaded module, and persistent naming rules.
Solution – Primary Fix
Load correct module, fix interface stanza, and restart networking service.
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Solution – Alternative Approaches
Add temporary static config from console for immediate access.
Verification & Acceptance Criteria
Interface persists across reboot and passes gateway/DNS checks.
Rollback Plan
Revert interface file and kernel package to last known-good state.
Prevention & Hardening
Pin tested kernels and document NIC naming in provisioning scripts.
Related Errors & Cross-Refs
Device not found and RTNETLINK answers no such device.
Related tutorial: View the step-by-step tutorial for Ubuntu 14.04 LTS.
View all Ubuntu 14.04 LTS tutorials on the Tutorials Hub β
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
Ubuntu networking and interface configuration guides.
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