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How to setup a new Windows 2008 R2 Network Load Balancing

Posted by Alin D on September 10, 2010

How to setup a new Windows 2008 R2 Network Load Balancing.

1- Install and configure Network Load Balancing (NLB). To perform the following procedures you must use an account that belongs to the local Administrators security group on each host. Perform the following procedures in both hosts.

  • Click Start, click Administrative Tools, and then click Server Manager.
  • In the Features Summary area of the Server Manager main window, click Add Features.
  • In the Add Features Wizard, select the Network Load Balancing check box.
  • Click Install.
  • Alternatively, you can install NLB by typing the following command (You must run the cmd with elevated rights – Right click and choose the option run as Administrator): “servermanagercmd.exe -install nlb“.
  • After installing NLB, check the properties of your network adapter for the NLB option.
  • 2- Create the new NLB cluster (Perform the following steps in one of the nodes).

  • To open Network Load Balancing Manager, Right-click Network Load Balancing Clusters, and then click New Cluster.
  • To connect to the host that is to be a part of the new cluster, in the Host text box, type the name of the host, and then click Connect.
  • Select the interface that you want to use with the cluster, and then click Next. (The interface hosts the virtual IP address and receives the client traffic to load balance.)
  • In Host Parameters, select a value in Priority (Unique host identifier). This parameter specifies a unique ID for each host. The host with the lowest numerical priority among the current members of the cluster handles all of the cluster’s network traffic that is not covered by a port rule.
    You can override these priorities or provide load balancing for specific ranges of ports by specifying rules on the Port rules tab of the Network Load Balancing Properties dialog box.
    In Host Parameters, you can also add dedicated IP addresses, if necessary.
  • Click Next to continue.
  • In Cluster IP Addresses, click Add and type the cluster IP address that is shared by every host in the cluster. NLB adds this IP address to the TCP/IP stack on the selected interface of all hosts that are chosen to be part of the cluster. (NLB does not support Dynamic Host Configuration Protocol (DHCP). NLB disables DHCP on each interface that it configures, so the IP addresses must be static.)
  • Click Next to continue.
  • In Cluster Parameters, select values in IP Address and Subnet mask (for IPv6 addresses, a subnet mask value is not needed). Type the full Internet name that users will use to access this NLB cluster.
  • In Cluster operation mode, click Unicast to specify that a unicast media access control (MAC) address should be used for cluster operations. In unicast mode, the MAC address of the cluster is assigned to the network adapter of the computer, and the built-in MAC address of the network adapter is not used. We recommend that you accept the unicast default settings.
  • Click Next to continue.
  • In Port Rules, click Edit to modify the default port rules, if needed.
  • To add more hosts to the cluster, right-click the new cluster, and then click Add Host to Cluster. Configure the host parameters (including host priority, dedicated IP addresses, and load weight) for the additional hosts by following the same instructions that you used to configure the initial host. Because you are adding hosts to an already configured cluster, all the cluster-wide parameters remain the same.
  • DONE!!!

    Technet Network Load Balancing

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