The following is an example of the Data Source Specification section of the odbc.ini file that shows with DSN tracing entries included:
[financial]
Driver=/opt/teradata/client/ODBC_64/lib/tdata.so
Description=Teradata 5550H running Teradata Database
DBCName=123.45.67.10
DBCName2=123.45.67.11
DBCName3=123.45.67.12
Username=odbcadm
Password=
Database=
DefaultDatabase=sales
DSNTraceEnable=YES
DSNTraceFilePath=/tmp/ODBC.Trace.log
DSNTraceFileMaxSize=1000000
DSNTraceOverwrite=NO
DSNTraceLineNumbers=YES