The dsnmigrate tool uses switches to control DSN which are migrated.
dsnmigrate.exe [/?|/help] [l|/ul|/sl][/a|/ua|/sa] [[/dsn|/udsn|/sdsn]=dsn] [/suffix=suffix]
All DSNs that are converted are renamed to “<dsn>-backup” before the conversion is completed.
When the new Sybase DSNs are created and the conversion is completed, the name is changed to“<dsn>,” which allows existing applications to continue to run without any modifications.