Hi Howard,
I've used DG Broker on 11g for my last two contracts with no problems at all.
We had the setup as one primary and one standby in a remote location for all
production databases in one contract, and for my last we had the primary in
Dublin with a Dublin based standby plus a separate DR standby in Amsterdam.
Linux and Windows, DG works well.
Cheers,
Norm.
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Sent from my Android device with K-9 Mail. Please excuse my brevity.