commdirmig can migrate the LDAP directory directly to Schema 2, native mode, or through the intermediate stage—Schema 2, compatibility mode.
Use the -t option to specify the current schema version and mode (before the migration begins) and the version and mode to which commdirmig will migrate the schema. The -t option takes one of the following arguments:
-t 1 specifies a migration from Schema 1 to Schema 2, native mode.
-t 2 specifies a migration from Schema 1 to Schema 2, compatibility mode.
-t 3 specifies a migration from Schema 2, compatibility mode to Schema 2, native mode.
-t is a required option.