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Configure the IPv4 DHCP Relay Agent

Applies To: Windows Server 2008 R2

The DHCP Relay Agent component relays DHCP messages between DHCP clients and DHCP servers on different IP networks. Because DHCP is a broadcast-based protocol, by default its packets do not pass through routers. A DHCP relay agent receives any DHCP broadcasts on the subnet and forwards them to the specified IP address on a different subnet. The DHCP Relay Agent is compliant with RFC 1542, "Clarifications and Extensions for the Bootstrap Protocol." For each IP network segment that contains DHCP clients, either a DHCP server or a computer acting as a DHCP Relay Agent is required.

noteNote
You cannot use the DHCP Relay Agent component on a computer that is running the DHCP service, the network address translation (NAT) routing protocol component with automatic addressing enabled, or Internet Connection Sharing (ICS).

Membership in the local Administrators group, or equivalent, is the minimum required to complete this procedure.

To configure the IPv4 DHCP relay agent
  1. Open the RRAS MMC Snap-in.

  2. In the Routing and Remote Access MMC snap-in, expand IPv4, and then click DHCP Relay Agent.

  3. Add the network interfaces on which the server might receive DHCP requests that you want to send to the DHCP server. Right-click DHCP Relay Agent, click New Interface, select the appropriate network interface, and then click OK.

  4. In the DHCP Relay Properties dialog box, select Relay DHCP packets, and then click OK.

  5. In the navigation pane, right-click DHCP Relay Agent, and then click Properties.

  6. On the General tab, enter the IPv4 address of the DHCP servers that you want to provide DHCP services for the RRAS server’s clients, click Add, and then click OK.

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