Hello,
We have this kind of scenario implemented :
OS : IBM AIX 6.1
Database : Oracle, MaxDB
Node 1 : ASCS, SCS, DVEBMGS running
Node 2 : ERS and Dialog instance running.
During the failover ASCS & SCS(message server) resources are moved from Node1 to Node2 and Dialog instance is already connecting to message server so no need for re-start or re-connection.
This is tried and tested solution and it's working fine for us.
Regards,
Nitesh