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Version: v25.07.31

DHCP Server

This guide explains how to configure a DHCP server for multiple LAN interfaces, enabling automatic IP address assignment to devices connected to the same network. It includes easy-to-follow steps to set up and test the configuration.

Overview​

A DHCP server automatically assigns IP addresses to devices in a network, simplifying network management. By configuring a DHCP server on the LAN interface, client devices can automatically connect to the network without manually setting IP addresses.

diagram

Important Prerequisite:​

Before starting the DHCP server, you need to make sure that your chosen network connection (such as a LAN) has been assigned a specific IP address. See the document titled How to Configure Static for information on how to set a specific IP on this connection. This specific IP address will act as a gateway for computers on that network.

Enable DHCP Server and Configure New Range​

Edit the LAN Interface

The first step is to access the configuration details for the existing LAN interface.

  • Click on the Edit button corresponding to the LAN interface.

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Enable DHCP and Configure Range

In this section, the DHCP service is activated and the pool of IP addresses that client devices automatically receive is defined.

  • Enable DHCP: Check the DHCP Server option.

  • This action turns on the service responsible for automated IP address assignment.

  • Set IP Range: This defines the scope of addresses that the server can lease to connected devices.

    • Enter the Start Range (e.g., 172.10.2.51). This is the first available IP address in the dynamic pool.
    • Enter the End Range (e.g., 172.10.2.101). This is the last available IP address in the dynamic pool.

  • Once the settings are configured, click on the Update button.

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  • Upon clicking update, a confirmation message, Interface is saved successfully will appear on the screen.

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Client PC Configuration​

  • To ensure the DHCP server is working as expected:
    • Connect client PCs to the configured LAN ports.
    • Verify that:
      • The client receives an IP address within the configured DHCP range (e.g., 172.10.2.51 to 172.10.2.101).
      • Internet connectivity and Default Gateway (CGW) settings are functional.
    • Use the ipconfig or ifconfig command on the client PC to view the assigned IP address and gateway.

FAQ​

Q:1 How to configure static IP-MAC binding in DHCP server settings?

Q:2 How to View the DHCP Lease Table for Active Clients?

Q:3 How to define an excluded IP address range in a DHCP pool?