When I was reading the SQL Cluster deployment document from MSIB 2.5 http://www.microsoft.com/downloads/...78-1FFA-4E6C-9AB0-D209B702DF45&displaylang=en) It says that Â¡K. Â¡P Do not connect the SQL Server computers using a crossover cable; use a switch or hub instead. Does anybody know why not using crossover for heart-beat? I was asking around and I got response that ... "Before installing a cluster using a shared storage network, you would be turning off the other machine in the cluster. If you use a crossover cable, the other NIC for heartbeat would not be detected at all as connected in the first machine. If its connected to a hub we would detect that NIC even if the other machine is down and continue with the cluster configuration. Otherwise there is a registry setting to work around this." Does anybody know which registry to set this up? Thanks a lot. Po-Shan.