🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026
Affected versions: SUSE Linux Enterprise Server 16

📖 ~1 min read

Table of contents
  1. Symptom & Impact
  2. Environment & Reproduction
  3. Root Cause Analysis
  4. Quick Triage
  5. Step-by-Step Diagnosis
  6. Solution – Primary Fix
  7. Solution – Alternative Approaches
  8. Verification & Acceptance Criteria
  9. Rollback Plan
  10. Prevention & Hardening
  11. Related Errors & Cross-Refs
  12. References & Further Reading

Symptom & Impact

`systemctl status wickedd` reports failed and interfaces stay down after reboot.

Environment & Reproduction

Seen on SLES 16 upgrades where `/etc/sysconfig/network/ifcfg-*` had stale STARTMODE values.

Root Cause Analysis

Conflicting NetworkManager presence or invalid ifcfg keys block wickedd startup.

Quick Triage

Run `wicked show all` to see configured vs operational interfaces.

Step-by-Step Diagnosis

Inspect `journalctl -u wickedd -u wicked –since -1h` for parse errors.

Illustrative mockup for sles-16 — wicked_service-fail_terminal
Terminal diagnostics for wickedd network service fails to start at boot — Illustrative mockup — Progressive Robot

Solution – Primary Fix

Disable NetworkManager (`systemctl disable –now NetworkManager`) and run `wicked ifup all`.

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Illustrative mockup for sles-16 — wicked_service-fail_logs
Logs and evidence for wickedd network service fails to start at boot — Illustrative mockup — Progressive Robot

Solution – Alternative Approaches

Migrate to NetworkManager fully and remove `wicked` if the deployment standard allows it.

Verification & Acceptance Criteria

All ifcfg-defined interfaces report `up` in `wicked show all` and ping succeeds.

Rollback Plan

Restore the previous `/etc/sysconfig/network` snapshot via snapper if configs were broken.

Prevention & Hardening

Pick one network stack per host (wicked OR NetworkManager) in your build profile.

Frequently paired with `dracut` initrd warnings about missing network modules.

Related tutorial: View the step-by-step tutorial for sles-16.

View all sles-16 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

SLES 16 networking with wicked reference.

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