Hi Stanley,
The statement was incorrect. I meant, install the add-on on the heavy forwarders OR the indexers(search peers).
If you have installed the add-on on heavy forwarders, I recommend to have the add-on on the indexers as well, just for having all the right .conf files for the incoming data. You don't need to setup the add-on on the indexer, just setup the add-on on the the heavy forwarder.
If you install the add-on on all the heavy forwarders, it will have duplicate data.
Also in case of a failure, you need to again setup the app on another heavy forwarder in such scenario.
One way to minimize the impact is if you have multiple ACI fabrics having their own APIC clusters, You can individually setup each APIC of an ACI fabric on an individual heavy forwarder.
Hope this helps!
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