VLAN Tutorial - Complete Configuration Guide
📋 What is a VLAN?
A VLAN (Virtual Local Area Network) is a way to segment networks within the same physical switch, allowing greater control and security. They are widely used in companies, internet service providers (ISPs), and data centers to separate traffic and optimize performance.
🌟 Why use VLANs?
- 🚀 Improves network organization by separating different departments.
- 🛡️ Increases security by isolating internal traffic.
- 📶 Prevents network congestion and improves performance.
- 🌐 Allows segmentation for ISPs, creating separate customer networks.
📚 What You Will Learn in This Tutorial
This VLAN tutorial was created to help you—whether you are an IT professional, student, or enthusiast—practically understand how VLANs work, their applications, and how to configure them correctly to avoid common mistakes in corporate environments.
By the end of this guide, you will be able to choose safe VLAN ranges, avoid ID overlaps, and optimize your local network.
🔢 How to Use the VLAN Calculator
Follow the steps below to calculate VLANs correctly:
1️⃣ Access the Tool
Go to the VLAN Calculator page.
3️⃣ Fill in the Data
In the "Choose a VLAN range" selector, you can choose from:
- 🔧 Custom: Manually define the VLANs you want to use.
- 🌍 1 - 1000: VLANs for general use.
- 🔒 1001 - 2000: VLANs reserved for private networks.
- 🌐 2001 - 3000: VLANs used by service providers (ISPs).
- 🏢 3001 - 4094: VLANs for specific and segmented networks.
3️⃣ Fill in the Data
In the form, fill in the following fields:
- 📌 Starting VLAN ID: Between 1 and 4094.
- 📏 Block Size: Number of desired VLANs.
- 🔢 Ending VLAN ID: Can be filled manually or calculated automatically.
4️⃣ Click "Calculate VLANs"
The tool will display the correct VLAN range.
📊 Example Output
If you enter:
- VLAN Range: <strong>1001 - 2000</strong> (Reserved VLANs)
- Starting VLAN: <strong>1100</strong>
- Block Size: <strong>10</strong>
The result will be:
1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109
❓ Frequently Asked Questions (FAQ)
🔹 What are reserved VLANs?
Reserved VLANs are VLAN ranges that are traditionally not used for common networks. For example, VLAN 1 is used by default by many switches and can pose a security risk if used without proper configuration.<br><br>VLANs between 1001 and 1024 are often reserved for internal use on older Cisco switches (ISL). VLANs above 4000 are generally used in very specific environments or for testing.
🔹 How to avoid VLAN conflicts?
Make sure each department or ISP customer has a unique VLAN range.
🔹 Can VLANs be used on Wi-Fi?
Yes! Many companies use VLANs to separate guest and corporate networks.
Did you find this helpful? Share this tutorial with your colleagues or classmates so more people can configure networks securely!
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