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DHCP Relay over VPN

Published On: Sep 05, 2017 

Vigor router can act as a DHCP Relay Agent forward the DHCP requests to the existing DHCP server, even if the DHCP server is on the remote network connecting to the router by the VPN. Below are the necessary configurations.

1. Go VPN and Remote Access >> LAN-to-LAN, Enable Multicast via VPN in the VPN profile connecting to the DHCP server.

a screenshot of DrayOS

2. Go to LAN >> General Setup, select "Enable Relay Agent" at DHCP Server Configuration, and enter the local IP address of the DHCP server at DHCP Server IP Address.

With the configuration above, the router will forward the DHCP requests over the VPN.DHCP Relay over VPN.

1 Go to VPN and Remote Access >> VPN Profiles, select the VPN profile connecting to the DHCP server. Select "Enable" for Multicast via VPN in the Advanced page.

a screenshot of vigor3900

2. Go to LAN >> General Setup, select the LAN profile that should get IP addresses from the remote server then click Edit. Select "Disable" for DHCP Server and Apply.

a screenshot of vigor3900

3. Go to the DHCP Relay page, select the LAN profile then click Edit.

  • Check Enable
  • Select "VPN" for DHCP Server Location
  • Enter the IP address of the DHCP server at DHCP Server IP
  • Apply the settings.

With the configuration above, the router will forward the DHCP requests over the VPN.DHCP Relay over VPN.

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