DHCP Vendor Class Identifiers
MSFT 50: Windows Computer, dhcpcd-5 5 6: Android Device
Introduction
DHCP Vendor Class Identifiers (VCIs) are used by DHCP servers to identify the type of device requesting an IP address. This information can be used to provide the device with specific configuration parameters or to restrict access to certain network resources.
MSFT 50: Windows Computer
The MSFT 50 VCI is used to identify Windows computers. This VCI is typically sent by the Microsoft Windows DHCP Client service.
dhcpcd-5.5.6: Android Device
The dhcpcd-5.5.6 VCI is used to identify Android devices. This VCI is typically sent by the dhcpcd client service.
Traditional Client Vendor Name Updates
In addition to the MSFT 50 and dhcpcd-5.5.6 VCIs, there have been some updates to the traditional Client Vendor Name for some Windows-based devices. These updates are as follows:
- Windows 10: "Microsoft Windows 10 DHCP Client"
- Windows 8.1: "Microsoft Windows 8.1 DHCP Client"
- Windows 7: "Microsoft Windows 7 DHCP Client"
Vendor Specific DHCP Option Diagram
The following diagram shows an example of how a vendor specific DHCP option diagram looks like:
In the example, three vendor-specific options have been set:
- Option 60: Vendor Code (MSFT 50)
- Option 61: Client Identifier
- Option 66: TFTP Server Name
DHCP Name Similarity to PC Name
It is worth noting that the DHCP name is very similar to the PC name. This suggests that the device type shown in the light cat MSFT 50 is intentional.
Conclusion
DHCP Vendor Class Identifiers are an important part of DHCP. They allow DHCP servers to identify the type of device requesting an IP address and to provide the device with specific configuration parameters or to restrict access to certain network resources.
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