in reply to kerberization setting for Sybase DBLib
The short answer: you can't.
Kerberos is implemented in the Sybase client code layer, not by the Sybase::DBlib or Sybase::CTlib modules themselves.
Sybase has been saying for the last 10 years (at least) that DBlibrary will not be upgraded to support all the new functionality, and that you should migrate to ClientLibrary.
For perl this means Sybase::CTlib, or DBI/DBD::Sybase, which should both support Kerberos based authentication logic.
Michael
In Section
Seekers of Perl Wisdom