Configuring DHCP Relays on Huawei Core Switches

To configure DHCP relay on a Huawei switch, create a DHCP server group, enable DHCP relay on the relevant VLAN, and bind the VLAN to the DHCP server group.

Step-by-Step Configuration

1. Create a DHCP Server Group:
   • Access the switch's command line interface (CLI) and create a DHCP server group. This can be done using the following command:

     dhcp server group dhcpgroup1

2. Add DHCP Servers to the Group:
   • Specify the IP addresses of the DHCP servers that will be used for IP address allocation:

     [Switch-dhcpgroup1] server-ip 10.10.10.1

3. Enable DHCP Relay on the VLAN Interface:
   • Identify the VLAN interface (e.g., VLANIF 100) where you want to enable DHCP relay. Use the following command to enable it:

     interface Vlanif100[Switch-Vlanif100] dhcp select relay

4. Bind the VLAN Interface to the DHCP Server Group:
   • Bind the VLAN interface to the DHCP server group you created earlier:

     [Switch-Vlanif100] dhcp relay binding server-group dhcpgroup1

5. Configure the Default Route:
   • Ensure that the switch has a default route configured to reach the DHCP servers if they are on a different subnet:

     ip route-static 0.0.0.0 0.0.0.0 10.20.20.1

6. Verify the Configuration:
   • After completing the configuration, you can verify the DHCP relay settings using the following command:

     display dhcp relay interface Vlanif100

   • This command will show the DHCP relay agent running information, including the server group name and gateway address in use .

Additional Notes

• Activate DHCP Service: Ensure that the DHCP service is activated on the switch, even if it is only acting as a relay. This is crucial for the relay function to work properly .
• Troubleshooting: If clients are not receiving IP addresses, check the VLAN configurations, ensure that the DHCP servers are reachable, and verify that the relay settings are correctly applied. By following these steps, you should be able to successfully configure DHCP relay on your Huawei switch, allowing clients on different VLANs to obtain IP addresses from a centralized DHCP server.