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Enable multicast support

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

To enable multicast support

  1. Open Network Load Balancing Manager.

  2. If Network Load Balancing Manager does not already list the cluster, connect to the cluster.

  3. Right-click the cluster, and then click Cluster Properties.

  4. On the Cluster Parameters tab, in Cluster operation mode, select Multicast. If appropriate, you can also enable Internet Group Management Protocol (IGMP) support by clicking the IGMP multicast check box.

Important

  • To start Network Load Balancing Manager, open a Command prompt. From the command window, type NLBMgr, and then press ENTER.

Notes

  • When using Network Load Balancing Manager, you must be a member of the Administrators group on the host that you are configuring, or you must have been delegated the appropriate authority. As a security best practice, consider using Run as to perform this procedure. If you are configuring a cluster or host by running Network Load Balancing Manager from a computer that is not part of the cluster, you do not need to be a member of the Administrators group on that computer. For more information, see Default local groups, Default groups, and Using Run as.

  • To start Network Load Balancing Manager, open a Command prompt. From the command window, type NLBMgr, and then press ENTER.

  • To start Network Load Balancing Manager, open a Command prompt. From the command window, type NLBMgr, and then press ENTER.

  • You can only enable IGMP support when your cluster is configured for multicast mode.

  • If you enable IGMP support, the allowed multicast IP address is restricted to the standard class D range; that is, 224.0.0.0 to 239.255.255.255.

Information about functional differences

  • Your server might function differently based on the version and edition of the operating system that is installed, your account permissions, and your menu settings. For more information, see Viewing Help on the Web.

See Also

Concepts

Connect to existing clusters from Network Load Balancing Manager using a host list
Connect to existing clusters from Network Load Balancing Manager using a single host
Network Load Balancing parameters
Multiple network adapters
Single network adapter
Nlbmgr