Checking /etc/services


Checking /etc/services
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On each system in the cluster, use the more command to check the file /etc/services.

Remember to perform the following:

Make sure each partition has a port number assigned. The number of reserved ports depends on the number of partitions.
Make sure that no other services use the ports. Manually assign new numbers if necessary.
Make sure all systems in the cluster have the same entries in the /etc/services file.

The following is an example for two DB2 UDB instances: db2inst1 and db2inst2. Both instances have two partitions each. Each instance requires two ports plus one port per partition, hence four lines per instance.

# more /etc/services
DB2_db2inst1      60000/tcp
DB2_db2inst1_1    60001/tcp
DB2_db2inst1_2    60002/tcp
DB2_db2inst1_END  60003/tcp
DB2_db2inst2      60004/tcp
DB2_db2inst2_1    60005/tcp
DB2_db2inst2_2    60006/tcp
DB2_db2inst2_END  60007/tcp

Inspect the file and verify that no duplicate port numbers exist.