We recently performed our 7.1 upgrade (from 6.1) on a number of 400's. Since the upgrade, we are having issues with SSL communication over data queues in particular. It seems that the system simply stops sending for no reason (nothing in the logs to explain why).
If the job involved in the socket send is restarted, the connection is re-established, and items are sent again for a given length of time, before it stops yet again. We've gone through router card changes, we've gone through netstat connections to determine if there was a connection that just closed. Nothing has otherwise appeared to change communication-wise.
We're to the point of asking IBM for assistance on setting up a communication trace. Anyone have any suggestions as to where else we could be looking to see if the cause is on our i5 or if it's a network/router issue?