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Home Solutions Tips Scripts Tools. In my case wanted to create a basic two node NLB. Under such a scenario the cluster is referred to as a farm.
This approach is ideal for load balancing of web servers where the same static web site data is stored on each node. In an alternative configuring, referred to as a pack the nodes in the cluster all access shared data. In this scenario the data is partitioned such that each node in the cluster is responsible for accessing different parts of the shared data. This is commonly used with database servers, with each node having access to different parts of the database data with no overlap a concept also known as shared nothing.
Windows Server R2 Network Load Balancing clustering can be configured using either one or two network adapters in each node, although for maximum performance two adapters are recommended. In such a configuration one adapter is used for communication between cluster nodes the cluster adaptor and the other for communication with the outside network the dedicated adapter.
Network Load Balancing may be configured on a port by port basis or range of ports. For each port three options are available to control the forwarding of the traffic:. As such, the server application will typically maintain some form of session state during the client server transaction. Whilst this is not a problem in the case of a Single Host configuration described above, clearly problems may arise if a client is diverted to a different cluster node partway through a session since the new server will not have access to the session state.
Windows Server R2 Network Load Balancing addresses this issue by providing a number of client affinity configuration options. Client affinity involves the tracking of both destination port and source IP address information to optionally ensure that all traffic to a specific port from a client is directed to the same server in the cluster. The available Client affinity settings are as follows:. The first step in building a load balanced cluster is to install the Network Load Balancing feature on each server which is to become a member of the cluster.
This can be achieved by starting the Server Manager tool, selecting Features from the left panel and then clicking on the Add Features link. In the list of available features, select Network Load Balancing and click on the Next button followed by Install. Once loaded, the manager will appear as shown in the following figure:. If default credentials are configured, the user will be prompted for account and password information each time a connection to a cluster node is established.
To begin the cluster creation process, right click on the Network Load Balancing Clusters entry in the left panel of the manager window and select the New Cluster menu option. This will display the New Cluster connection dialog. In this dialog, enter either the name or IP address of the first server to be included in the load balanced cluster and press the Connect button to establish a connection to that server.
If the connection is successful the first server will be listed as shown below:. Clicking Next will display a warning that DHCP will be turned off for the network adapter of the specified host and that any necessary gateway information will need to be configured manually using the server's network connection properties dialog accessible from the Control Panel. The Priority unique host ID is a number between 1 and 32 and serves two purposes. Firstly, the number provides a unique ID within the cluster to distinguish the server from other nodes.
Search related threads. Remove From My Forums. Answered by:. Archived Forums. High Availability Clustering. Sign in to vote. I have managed to get the two nodes converged, but that is all. The vIP is on the same subnet as host1. I have changed the binding order of the Nics. There are lots of other posts regarding static ARP tables etc but I am not sure what should be entered in to these, I can see that it is probably a routing issue between datacenters. Any pointers would be very much appreciated.
Tuesday, October 23, PM.
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