Solution : https://service.sap.com/sap/support/notes/1486120 (SAP Service marketplace login required)
Key words : 
/usr/sap/<sid>/<instance>/exe/db6_clidriver  /usr/sap/<sid>/sys/global/db6/<platform>/db6_clidriver                             remark, db2 library successfully loaded db2 library '/usr/sap/c11/  dvebmgs00/exe/db6_clidriver/lib/libdb2, setenv ld_library_path /usr/sap/c11/sys/glocal/db6/sunos_64  /db6_clidriver/lib, terms db2luw db6 thinclient thin client db2support db2trc trace db2level reason, /usr/sap/<sid>/sys/global/db6/<platform>/db6_clidriver/bin/db2support, /usr/sap/<sid>/sys/glocal/db6/<platform>/db6_clidriver/lib, /usr/sap/<sid>/sys/global/db6/<platform>/db6_clidriver/bin 3, /usr/sap/<sid>/sys/global/db6/<platform>/db6_clidriver/adm, $ echo $shell  /bin/csh            # c-shell  /bin/ksh            # korn shell, setenv db2dsdriver_cfg_path /usr/sap/<sid>/sys/global/db6
Related Notes : 
       
| 101809 | DB6: Supported Fix Packs IBM DB2 for Linux,UNIX and Windows | 
| 83819 | DB6: Collecting support data | 
| 38513 | Database trace (db2trc) with DB malfunctions |