RRAS: At least one interface in the IPv4 DHCP Relay Agent must have 'Relay DHCP packets' enabled

Updated: August 3, 2009

Applies To: Windows Server 2008 R2, Windows Server 2012, Windows Storage Server 2012

This topic is intended to address a specific issue identified by a Best Practices Analyzer scan. You should apply the information in this topic only to computers that have had the Network Policy and Access Service (NPAS) Best Practices Analyzer run against them and are experiencing the issue addressed by this topic. For more information about best practices and scans, see Best Practices Analyzer.

 

Operating System

Windows Server 2012, Windows Server 2008 R2

Product/Feature

Routing and Remote Access Service (RRAS)

Severity

Error

Category

Configuration

IPv4 DHCP Relay Agent is enabled and configured, but none of the interfaces assigned to DHCP Relay Agent are configured with 'Relay DHCP packets' enabled.

If 'Relay DHCP packets' is not enabled on at least one interface assigned to the IPv4 DHCP Relay Agent routing protocol, then DHCP Relay Agent cannot forward DHCP packets from clients to DHCP servers.

The IPv4 DHCP Relay Agent listens for DHCP broadcast packets sent on a subnet, and forwards them as a unicast packet to a DHCP server on a different subnet. You must configure the interface through which the DHCP server can be reached with the Relay DHCP packets option.

Use 'Routing and Remote Access' in Server Manager to enable 'Relay DHCP packets' on at least one interface assigned to IPv4 DHCP Relay Agent.

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

  1. Start Server Manager. Click Start, click Administrative Tools, and then click Server Manager.

  2. In the navigation tree, expand Roles, expand Network Policy and Access Services, expand Routing and Remote Access, expand IPv4, and then click DHCP Relay Agent.

  3. In the details pane, right-click the interface that you want to use to access the DHCP server, and then click Properties.

  4. On the General tab, select Relay DHCP packets, and then click OK.

For more information about the DHCP Relay Agent, see Configure the IPv4 DHCP Relay Agent (http://go.microsoft.com/fwlink/?LinkId=156481).

For more about the Routing and Remote Access role service, see Routing and Remote Access (http://go.microsoft.com/fwlink/?linkid=153482) on TechNet, and Routing and Remote Access Service in the Windows Server Technical Library.

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