Windows 2008 r2 nlb cluster requirements

Select Interface. Set Priority. Add Cluster IP. Assign DNS Name. Select Ports. Cluster Configured. DNS Record. Check for Errors. Use the Add Host wizard to add one ore more nodes to your cluster You also have to setup the application that you want to cluster.

Chose the interface and click Next: This brings up the Host Parameters page, where you enter the IP address to be used for the cluster for the cluster, then you click next: This brings up the Cluster IP address page. Here you add the address used by clients to connect to nodes in the cluster: After adding the IP address, and clicking next, the New Cluster wizard displays the Cluster Parameters where you specify the cluster IP configuration and the cluster operation mode and click next : Finally, the wizard displays the port rules.

In this case, we specify the cluster shoudl handle TCP Port 80 and click on Finish : The Wizard then does the necessary configuration, resulting in a single node NLB cluster, shown in the NLB manager like this: At this point, you can navigate to the cluster to see the application running: Adding Additional Nodes A single node cluster is not much value, so you next need to add an additional node or nodes.

As seen by NLB Manager: Re navigating in your browser to the cluster may or may not result in a different page. No comments:. Newer Post Older Post Home. Subscribe to: Post Comments Atom. If you are using another virtual environment such as XenServer or VirtualBox and you are experiencing similar issues, contact the manufacturer for guidance. Multicast mode differs from unicast mode. To support this configuration, you must configure the network infrastructure to use static ARP entries and MAC address table entries.

If you skip the manual configuration step, the network switches may flood NLB traffic to all ports or drop packets. The network may seem to function correctly at first, but problems increase over time. The articles that are listed in the following table explain clearly what you have to do to correctly configure your network infrastructure, based on your network infrastructure vendor.

Remember that we don't maintain these articles. Therefore, we cannot guarantee that they are accurate or available.

If you have any questions about these articles, please contact the appropriate vendor. In a virtual environment, the network switches connect to the hypervisor host servers. In a high-availability virtual environment, a group of hypervisor hosts supports a group of virtual machines. An individual virtual machine may reside on any of the hypervisor hosts, and it may migrate to a different hypervisor host under specific circumstances. The network traffic must be able to reach the correct virtual machine regardless of which hypervisor host that virtual machine runs on.

To use multicast mode in such an environment, you have to configure the MAC address tables of the network switches so that each port that connects to a hypervisor host uses a static entry to map to the NLB multicast MAC address. For example, consider an environment that contains eight hypervisor hosts. Each hypervisor host has two network adapters, and all of the adapters connect to a switch.

This mode is basically the same as multicast mode, except that the switches can automatically build their MAC address tables in this mode. These messages indicate the group membership of the NLB nodes. The switches use this information to configure the MAC address table. Some of the articles that are listed in the Multicast section include the correct configuration parameters for their devices for multicast with IGMP. Enables NLB to be bound to multiple network adapters, which enables you to configure multiple independent clusters on each host.

Support for multiple network adapters differs from virtual clusters in that virtual clusters allow you to configure multiple clusters on a single network adapter. Can be configured to automatically add a host to the cluster if that cluster host fails and is subsequently brought back online.

The added host can start handling new server requests from clients. Enables you to take computers offline for preventive maintenance without disturbing the cluster operations on the other hosts.

There is no restriction on the number of network adapters on each host, and different hosts can have a different number of adapters. Within each cluster, all network adapters must be either multicast or unicast. NLB does not support a mixed environment of multicast and unicast within a single cluster. If you use the unicast mode, the network adapter that is used to handle client-to-cluster traffic must support changing its media access control MAC address. Do not add any other protocols for example, IPX to this adapter.

The following table provides links to additional information about the NLB feature that is available on the web. Network Load Balancing Best Practices. Skip to main content.