Configuring DHCP server and DHCP relay

Configure DHCP Server and DHCP Relay using the configuration editor

You can configure the DHCP server and DHCP relay settings for the appliances on your network using the configuration editor. The configuration is pushed to the appliances in the SD-WAN network through the change management process.

To configure a site as a DHCP server using configuration editor:

  1. Navigate to Configuration Editor > Sites > [Site Name] > DHCP > Server Subnets. Click +.

  2. Select a configured Routing Domain, if multiple domains are present.

  3. Select the Virtual interface to be used to receive the DHCP requests. The IP subnet used by the DHCP server to provides addresses for is auto-populated.

  4. Enter the Domain Name, Primary DNS, and Secondary DNS. The DHCP Server forwards this information to the clients.

  5. Click Enable to enable the subnet.

  6. Configure dynamic IP address pools that will be used to allocate IP addresses to clients. Specify the range starting and ending IP address, and select the Option set.

    Note

    The DHCP option sets are groups of DHCP settings that can be applied to individual IP address ranges. To create DHCP option sets, navigate to Global > DHCP Options Sets. Select the required DHCP options and specify a value for it.

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  7. Configure individual hosts that require a fixed IP address based on the MAC address. Select the Fixed IP Address, MAC Address, and Option Set.

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To configure a site as a DHCP relay using configuration editor:

  1. Navigate to Configuration Editor > Sites > [Site Name] > DHCP > Relays. Click +.

  2. Select a configured Routing Domain, if multiple domains are present.

  3. Select a Virtual Interface that communicates to a remote DHCP Server.

  4. Enter the DHCP Server IP that the relay will use to forward the request and response from the clients.

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You can configure a single DHCP Relay using a common Virtual Network Interface and point it to multiple DHCP Servers.

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To view a list of Clients from the DHCP Server Database, in the web management interface, navigate to Monitor > DHCP Server/Relay.

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Configuring an SD-WAN appliance as a DHCP server or a DHCP relay using appliance settings

You can manually configure individual SD-WAN appliance as a DHCP server or a DHCP replay from the appliance settings page.

To enable DHCP server on an SD-WAN appliance:

  1. Navigate to Configuration > Appliance Settings > Network Adapters. In the Network Adapters page, look for the Management Interface DHCP Server pane.

  2. Click Enable DHCP Server to start the server, then enter the Lease Time (in minutes), the Domain Name, and define the IP Address range by entering a Start IP Address and an End IP Address.

    Note:

    The server IP address pool should be within the management network.

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  3. Click Change Settings to finish configuring the DHCP Server.

    Note:

    If you plan to use DHCP Server on an SD-WAN appliance configured for High Availability (HA), do not configure the service on both the Active and Standby appliance. Doing so leads to duplicate IP addresses on the defined management network.

  4. Click Show Client to view the current DHCP clients, and click Clear Clients to release the DHCP Client leases

To enable DHCP relay service on an SD-WAN appliance:

  1. Navigate to Configuration > Appliance Settings > Network Adapters. In the Network Adapters page, look for the Management Interface DHCP Relay pane.

  2. Click Enable DHCP Relay check box to enable the service. Enter the DHCP Server IP Address and click Change Settings to begin using your appliance as a DHCP Relay Agent.

    Note

    If you plan to use DHCP Relay service on an appliance configured for High Availability (HA), do not configure the service on both the Active and Standby appliances. Doing so leads to duplicate IP addresses on the defined management network.

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