how to move FULL contents from a 10g OID (10.1.4.3) to a newly installed 11gOID (11.1.0.7)

We have 10g OID (10.1.4.3) cuurently in Production.   Need to move this to an 11g OID (11.1.0.7), a NEW install, on a new hardware.    How can i move the entire contents of the 10g OID into the newly installed 11g OID ?

i did try the following ..pl see note:263591.1

1) on the 10g OID host (to extract custom object classes adn all), 

ldapsearch -h <hostname> -p <OID_port> -D "cn=orcladmin" -w <orcladmin_pwd> -L -b "cn=subschemasubentry" -s base "objectclass=*" objectclasses attributetypes > objattr.ldif

====>   i am getting an empty output here (blank output file).   does it mean that i do not have any custom object classes and custom attributes ?