Identifying Vendor Classes in DHCP Requests
What are Vendor Classes?
Vendor classes are identifiers specified in DHCP requests that provide additional information about the device requesting an IP address. They allow network administrators to distinguish between different types of devices and apply specific policies or configurations accordingly.
How to Identify Vendor Classes
Vendor classes are typically included in the DHCP request header, specifically in the "Option 60: Vendor-Class" field. These identifiers are usually numerical values assigned by the device manufacturer and can be used to determine the type, model, or operating system of the device.
Examples of Vendor Classes
Here are some examples of common vendor classes:
- WEB MSFT 5 0: Windows computer
- dhcpcd-5 5 6: Android device
- WEB FRITZBox 7580 VDSL2 4 Gigabit bgn ac 24 50 800 n 1733 ac 2 USB 30 1 2 1 512 730: German version only FRITZBox 7581 VDSL2 x 2 4 Gigabit bgn ac 24 50 450 n 1300 ac 2 USB 30 1 2 0
- WEB Click Additional Settings for the Wi-Fi Network and disable the option Different names for the Wi-Fi networks on 24 and 5 GHz to use the same name SSID for both Wi-Fi networks: Instructions for configuring Wi-Fi networks on FRITZBox
- WEB Microsoft claimed three vendor classes where the MSFT 50 is the most used since it overrules MSFT and the market share of Windows 98 is around 001: Information about Microsoft's use of vendor classes
Significance of Vendor Classes
Identifying vendor classes is important for network management because it allows administrators to:
- Enforce device-specific policies
- Configure security measures based on device type
- Troubleshoot network issues related to specific devices
- Optimize network performance by segregating traffic from different devices
By understanding the purpose and use of vendor classes, network administrators can effectively manage and optimize their networks.
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