Hello all, My Current environment is -a standalone instance of SQL Server 2005 installed on Windows server 2003(not clustered). I am just listing the steps which i intend to perform to migrate this instance to Cluster. 1)Install windows cluster and make my current server a node in the cluster. 2)Take Standalone instance out of network. Make sure there is no entry for host name or IP address anywhere in the network. 3)Install SQL Server cluster with a new clustered instance. keep IP address and Virtual Server name same as standalone instance. 4)Restore databases and map logins on new clustered instance. 5)Once this is completed, Test failover to other node. I want to retain the instance name and IP same as there are many applications connecting to this.