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As of UM 5.3, UM applications can specify multiple LBMRDs to distribute the unicast topic resolution traffic; however, the LBMRDs do not act in a ACTIVE/STBY fashion. Redundant LBMRDs operate in a round robin fashion. The UM context will periodically move to the next LBMRD for sending outbound TR traffic. The same context will accept inbound TR traffic from all of the LBMRDs specified.
All UN applications within the same topic resolution domain must use the exact same set of LBMRDs, otherwise, there is a possibility for topic deafness between two contexts which are not using the exact same set of LBMRDs.
Hi Sherwin, thanks for you answer. I will check docs for this feature.