Oracle Single Client Access Name (SCAN).pdf
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An Oracle White Paper
June 2013
Oracle Single Client Access Name (SCAN)
Oracle Single Client Access Name (SCAN)
Introduction ....................................................................................... 1
Network Requirements for Using SCAN ............................................ 2
Option 1 – Use the Corporate DNS ............................................... 2
Option 2 – Use the Oracle Grid Naming Service (GNS) ................. 4
Workaround if No DNS Server is Available at Installation Time ..... 4
SCAN Configuration with Oracle Grid Infrastructure 11g Release 2 .. 5
SCAN Configuration with Oracle Grid Infrastructure 12c Release 1 ... 6
Enabling Multiple-Subnet Support for SCAN .................................. 7
Oracle Database Configuration Using SCAN ................................... 10
Client Load Balancing using SCAN ............................................. 10
Multiple-Subnet Support and LISTENER_NETWORKS ............... 11
Version and Backward Compatibility ............................................... 12
Miscellaneous SCAN-related Configurations ................................... 13
Using SCAN with Multiple Ports on the Same Subnet.................. 13
Using SCAN in a MAA Environment not using GDS .................... 14
Using SCAN in a MAA Environment using GDS .......................... 14
Using SCAN with Oracle Connection Manager ............................ 15
Summary and Conclusion................................................................ 15
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