DB2 SQL60331N Error in the db2nodes.cfg Reason code 11

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DB2 v9.1 fixpsck 10 - Single Instance on AIX
Issue - Can not connect to db2 database directly from server it self. (Remote connection were allowed)
Error returned was as below. Any db2 command failes with same error.


Since the remote connection are allowed, and only local connections were refused it was obvious that this was not caused by network error/port mismatch etc..

So we were checking for any server changes made and found that the OS admin has changed the "/etc/service" file in the process of SHC gap closing.

Cause - While the SHC OS admin has removed the db2 FCM (Fast communications manager) related entries from /etc/services. Which was causing the error.

What is FCM - FCM is the mechanism used by DB2 to communicate within database partitions in a DPF environment.

Solution - Add the FCM port entries in  "/etc/service". This entries should have port range defined as in the below example. (cat /etc/services | grep -i db2)
The difference between end and start FCM ports is dependent on the no of partitions in DPF system. 
DB2_ebpp       60001/tcp
DB2_ebpp_END   60005/tcp

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