Oracle OracleNet Tracing in 11g+

Don't forget, in 11g+, you just need to set the TRACE_LEVEL_* to start tracing.

No longer is there a need to set:

TRACE_DIRECTORY_*
or
TRACE_FILE_*

as all files go to the DIAGNOSTIC_DEST. Yes, even the client has a diagnostic dest. Looking under the client ORACLE_BASE.