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Local Connections Work, Connecting Via Listener To The Database Fails With ORA-01034 ORA-27101 (Doc ID 375688.1)

Last updated on NOVEMBER 06, 2017

Applies to:

Oracle Net Services - Version to [Release 10.2 to 11.2]
Oracle Net Services - Version to [Release 12.1]
Information in this document applies to any platform.


On a system with multiple IP addresses, when we connect with sqlplus locally on the server (i.e. "sqlplus user/password") everything is OK, but connecting through a TNS alias, either from the network or locally on the server, we get the the following errors:

sqlplus user/password@db_alias

ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
SVR4 Error: 2: No such file or directory 


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