protocol being used: "TCP/IP". Communication API being used: "SOCKETS

Hi,

We are performing Oracle to DB2 database migration .

In Adjust nametab phase below error is being faced:

Execution of the command "/usr/sap/SBX/SYS/exe/run/dipgntab -rwr40 -srctt DDNTT -srctf DDNTF -dsttt DDNTT -dsttf DDNTF -ttonly TT" finished with return code 255. Output:

ERROR in initialization (can't get R/3-version)

ERROR in initialization (can't get R/3-version)

Log file dipgntab.log contains :

ERROR in initialization (can't get R/3-version)

We tried to catalog the DB,edited /etc/services for sapdb2<SID> .

Manually entered above entry in services file against desired port 5912.

In trans.log it says :[finished with 0012]

DbSlConnectDB6( SQLConnect ): [IBM][CLI Driver] SQL30081N  A communication error has been detected. Communication

protocol being used: "TCP/IP".  Communication API being used: "SOCKETS".  Location where the error was detected:

17x.xxx.xxx.x".  Communication function detecting the error: "connect".  Protocol specific error code(s): "111",

SQLSTATE=08001

Also we set DB2CONN parameter to TCPIP...still same error is being faced.

Please suggest.