EdgeRouter - DHCP Relay


Overview


Readers will learn how relay DHCP messages from clients to a DHCP server located on a different subnet.

NOTES & REQUIREMENTS:
Applicable to the latest EdgeOS firmware on all EdgeRouter models. Please see the Related Articles below for more information.
 
Device used in this article:

Configuring DHCP Delay


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The network topology is shown below. The following interfaces are in use on the EdgeRouter:

  • eth1 - 192.168.1.1/24
  • eth2 - 172.16.1.1/24 

topology.png

The EdgeRouter will relay (forward) the DHCP requests from the clients in the 192.168.1.0/24 network to the DHCP server at 172.16.1.10. 

 

CLI: Access the command line interface (CLI). You can do this using the CLI button in the GUI or by using a program such as PuTTY.

1. Enter configuration mode.

configure

2. Enable the DHCP relay functionality on the relevant interfaces.

set service dhcp-relay interface eth1
set service dhcp-relay interface eth2

3. Specify the DHCP server where the client requests should be relayed to.

set service dhcp-relay server 172.16.1.10

4. Commit the changes and save the configuration.

commit ; save

Related Articles


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EdgeRouter - Configure DHCP Server on EdgeRouter

Intro to Networking - How to Establish a Connection Using SSH


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