D-Link DRO-210i manual Dhcp Relay

DHCP, DNS and Time

IP Address	Enter the IP address to be assigned to the system with the above MAC
	Address.

After entering all the information press the Apply button. The entries will now be displayed under the DHCP Static Mapping Client Table.

If the Static IP in the DHCP Reservation entry does not fall within the DHCP Server IP Range, then it will be treated as an invalid entry. These invalid entries will be displayed in dark grey color in the DHCP Static Mapping Client Table.

3.1.3 DHCP Relay

In DHCP implementations, the DHCP clients send requests to locate the DHCP server by broadcast messages. Since broadcast messages are normally limited to the local network, the DHCP server and client always need to be in the same physical network. In large networks, a server needs to exist on every LAN, which is not economical or easy to maintain. DHCP relay solves this problem.

A DHCP relay acts as an intermediary between the client in the local network and the remote DHCP server. It intercepts requests from clients and relays them to the server. The server then responds back to the relay, which then forwards the response back to the client.

This relay-agent functionality is most conveniently located in the router which interconnects the clients and servers, but may alternatively be located in a host which is directly connected to the client subnet.

Caution: Both DHCP Server and DHCP Relay cannot be enabled in the router

￿simultaneously. When DHCP Relay is enabled, the Server will be disabled automatically. And when DHCP Server is enabled, the Relay will be disabled.

Select Misc → DHCP → DHCP Relay to configure DHCP Relay as explained below.

Web UI

DHCP Relay

Relay-Status Select Enable or Disable to activate or deactivate the DHCP Relay.

DHCP Server IP Enter the IP address of the DHCP Server from which LAN clients will get their IP address.

Dlink DRO-210i User Guide 20