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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 JANUARY 21, 2024

Applies to:

Oracle Net Services - Version to [Release 12.1 to 18.1]
Oracle Database - Enterprise Edition - Version to [Release 12.2]
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:


May be triggered by:


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In this Document
 1. Fix the static database entries in LISTENER.ORA
 2. Activate dynamic database instance registration

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