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Running ACC and Agentless Discovery Together

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In this lesson, you will learn:

  • How the two methods can clash
  • How to keep them apart
  • How reconciliation helps

🔁 Quick look back: Last time: Validating ACC-Discovered CIs. You learned how the Finance servers from ACC were checked.

1 The Problem: Two Methods Could Fight Over the Same Servers

If a schedule’s range included the Finance zone:

  • Scans would fail against Finance, filling logs with errors.
  • Or, if reachable, two sources would update the same CI.

🎯 The problem: Two methods could fight over the same servers.

👉 The fix: Keep Finance out of IP schedules, and set reconciliation rules for any overlap.

Compare coverage by each method.
Figure 1. Who discovers what at SNWR.

2 Keeping them apart

  • Exclude agent-covered ranges from IP schedules.
  • Give each server one main source.
  • Use reconciliation rules if both must report.

3 If they overlap

Reconciliation rules decide which source updates which field. This stops flip-flopping.

💡 Good to know: Need a refresher? See CMDB Readiness › Reconciliation and Data Source Precedence for the rules.

4 Project Clear View: How We Implemented It

📍 Situation: A range set covered 10.10.0.0/16, which includes Finance.

🧭 Decision: Exclude the Finance range from IP schedules.

🛠️ Steps we took:

  1. Added 10.10.40.0/26 as an exclusion in the Mumbai range set.
  2. Checked no IP schedule reaches Finance.
  3. Confirmed ACC is the only source for Finance servers.
  4. Raised the change through the template.

✅ What we verified:

  • No failed scans against Finance.
  • Finance CIs have one source.

📁 Evidence: Range set change record.

5 Quick recap

  • Don’t let agents and scans cover the same hosts by accident.
  • Exclude agent ranges from IP schedules.
  • Give each server one main source.
  • Use reconciliation rules for real overlap.

6 Check yourself

Think of your answer first. Then tap to check.

1 How did SNWR stop IP scans hitting Finance? Show answer

It excluded 10.10.40.0/26 from the Mumbai range set.

2 What stops two sources overwriting each other? Show answer

Reconciliation rules.

3 What’s the only source for Finance servers? Show answer

ACC.

Nice work! SNWR’s two methods work side by side. 🎉
Next up: Troubleshooting ACC

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