Nodes can potentially communicate across network routers. Ĭan you ping each cluster node in the network? Which application or service do you want to deploy in the cluster?Ī multi-site cluster running Windows Server 2008 can contain nodes that are in different subnets, unless it is a cluster running SQL Server 2005 or SQL Server 2008 (which requires the use of a virtual local area network or VLAN). These errors occur because there are not enough portsĪvailable for RPC communication between a node that is trying to join the cluster and a node that can 'sponsor' that node.įor more information please refer to following MS articles:Įnable a network for cluster use (v=WS.10).aspxĬluster Topology and Firewalls Hope this helps! TechNet Subscriber Support If you are TechNet Subscription user and have any feedback on our support quality, please send your feedback here. Otherwise, errors in the cluster log will indicate that a 'Sponsor' is not available. If the nodes are separated by a firewall, ports 8011-8031 must be open for internode RPC connectivity.Such services include Windows DNS service, Windows Internet Name Service (WINS), the Microsoft SQL Server service, and others. The number of ports available to the Cluster service can become too small when other services are using some of the necessary This problem can occur because the Cluster service requires at least 100 ports for communication through remote procedure calls (RPC). (unless you just type a period in Cluster Administrator). When these ports are closed, event log error 1721 might occur when you connect to a cluster through Cluster Administrator For cluster nodes running many services, ports 5000-5099 (or more) might need to be open for remote RPC connectivity to Cluster Administrator.3343 (used by the Cluster Network Driver).To enable a network for cluster use, you may enable following network ports or exception:

Wfc firewall