There is a known issue with the installer running on IBM AIX 7.1 in which the DCManager plug-in fails to register with Sybase Central™. As a result, Sybase Central can be started but no DCManager functionality is available.
To check if you have this issue, run the installer to completion, then check the $SYBASE/DCM-15_7/InstallAndRegister.log file for this sort of error:
SYBASE_directory/shared/JRE-6_0_SR1_64BIT//lib/ppc64/default/libj9vm24.a. 0509-026 System error: A file or directory in the path name does not exist. libjvm.so failed to load: j9vm24
Restart Sybase Central to see the available DCManager functionality.