ORA-12537 when connecting to 11.1 Database through 11.2 Listener (Solaris)
(Doc ID 975596.1)
Last updated on JANUARY 27, 2020
Oracle Net Services - Version 184.108.40.206 and later Information in this document applies to any platform.
When running an 220.127.116.11 Listener and having this service an 11.1.0.x Database on Solaris (64bit) , connections might fail with ORA-12537 (ORA-12547 reported in the listener trace). However, connections to an 11.2 (same version) database work fine through the same 11.2 listener.
Possible upgrade from 11.1 to 11.2 while still maintaining the 11.1 Database to complete migration
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