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Running the First Controlled Subnet Pilot

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In this lesson, you will learn:

  • Why a pilot comes after single devices
  • How to pick a pilot range
  • What to watch

🔁 Quick look back: Last time: Discovering VMware vCenter. You learned how vCenter discovery links VMs to their servers.

1 The Problem: One Device Doesn’t Show Scale Problems

Single devices worked. But at scale, new problems appear:

  • Some servers have different settings.
  • The MID Server gets busier.
  • A few old servers behave differently.

🎯 The problem: One device doesn’t show problems that appear at scale.

👉 The fix: Run a controlled pilot on 30 servers before any wider scan.

Table of pilot results.
Figure 1. Results of the SNWR pilot.

2 Picking the pilot range

  • Small: 20 to 50 devices.
  • Mixed: Linux and Windows.
  • Known: the server team knows them.
  • Safe: no fragile devices.

3 What to watch

  • How long it takes.
  • MID Server memory.
  • Failures and their causes.
  • Excluded addresses: none should appear.

4 Project Clear View: How We Implemented It

📍 Situation: All single-device tests passed.

🧭 Decision: Run SNWR Pilot on 10.10.10.0/27 from snwrtest.

🛠️ Steps we took:

  1. Picked 30 mixed servers Priya knows well.
  2. Ran the schedule in the approved window.
  3. Watched MID memory and run time.
  4. Listed results: 27 complete, 3 failed.

✅ What we verified:

  • No excluded address was touched.
  • Each failure has a clear cause.

📁 Evidence: Pilot results for the pilot review.

5 Quick recap

  • Run a pilot after single-device tests.
  • Keep it small, mixed, known and safe.
  • Watch time, memory, failures and exclusions.
  • Every failure needs a cause.

6 Check yourself

Think of your answer first. Then tap to check.

1 Why a pilot after single devices? Show answer

Problems at scale don’t show on one device.

2 How many servers were in SNWR’s pilot? Show answer

30.

3 What were the three failures? Show answer

Two Windows servers with WMI blocked and one RHEL 9 server with a sudo gap.

Nice work! SNWR’s pilot has run. 🎉
Next up: Comparing the Pilot with the Client’s Known Inventory

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