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Building a Windows Server 2008 Network Load Balanced Cluster
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. Secondly, it specifies the priority order of the cluster. The cluster node with the lowest priority is assigned to handle all traffic that is not covered by a ''port rule''. All servers joining a cluster must have a unique ID. I new server attempting to join a cluster with a conflicting ID will be denied.
The ''Dedicated IP addresses'' fields are used when a single network adapter is used for both communication between cluster nodes and external network traffic. It is used to specify the host's unique IP address, which is used for non-cluster network traffic (i.e direct connections to the specific server from outside the cluster without being affected by the Network Load Balancing). This must be a fixed IP address and not a DHCP addressand as such should also be entered into the network properties dialog of the server.

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