You can create a Kerberos login mapping using either Sybase Central or a SQL statement.
Connect to the database as a DBA user.
Open the Login Mappings folder.
From the File menu, choose New > Login Mapping.
The Create Login Mapping wizard appears.
Connect to the database as a DBA user.
Execute a GRANT KERBEROS LOGIN TO statement.
See GRANT statement.
The following SQL statement grants KERBEROS login permission to the Windows user pchin.
GRANT KERBEROS LOGIN TO "pchin@MYREALM.COM" AS USER "kerberos-user"