Reminder - DB2 HADR and SQL1768N rc7

If I see SQL1768N rc7 when attempting to use DB2 HADR, there's a good chance that I've forgotten to update /etc/hosts meaning that one/both hosts is returning the loopback / localhost address of 127.0.0.1 when attempting to connect to itself via hostname.

For the record, /etc/hosts should look similar to this: -

In other words, there must be no other hostname alongside the localhost entries.

This is also useful: -