Database tuning
It'll improve the fail over when you set the database TCP ports to static instead of dynamic.
Implementation procedure:
  • Open "SQL Server Configuration Manager"
  • Select "SQL Server 2005 Network Configuration" tab
  • Click on "protocols for <SQL Instance name>
  • Double click on "TCP/IP on right side

    graphic
  • Select "IP Addresses" tab
  • Scroll down to "IPALL"

    graphic
  • Change "TCP Port" to the port you decided to use.
    Recommended is:
    - First Instance       1434
    - Second Instance   1435
  • Press 'OK'
  • Close "SQL Server Configuration Manager"
  • Restart the DB node
  • Once the DB node, remove also the dynamic ports and restart the SQL Services. Specially 'SQL Browser'.