A method of providing a single system image in a clustered environment. An internet
protocol (IP) address is assigned as a cluster IP address. The cluster IP address
is bound to a node in a cluster. A client request directed to the cluster IP address
is received in the node. The node multicasts the request to all nodes in the cluster.
A dynamically adjustable workload distribution function filters the request, wherein
the function is configured to allow a single node to process the client request.
A response to the request is obtained. A cluster media access control (MAC) address
is inserted into the response and the response is sent from the single node to
the client.