For application migration, the on-premise CommServe computer and the MediaAgent communicate with the network gateway through a one-way network route.
The following image shows the solution network overview.

The on-premise site contains the following components:
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A CommServe computer (CS) 
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A MediaAgent (MA) 
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A production client for the application (IDA) 
The cloud contains a Commvault network gateway server that communicates with the Cloud Compute node.
You must create the following two network topologies for the feature:
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One-way network topology. This is a one-way network route between a client group that contains the MediaAgent and the CommServe computer, and a client group that contains the network gateway server. 
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A network gateway topology. This is a network route that that uses a network gateway between a client group that contains the MediaAgent and the CommServe computer, and a client group that contains the clients that have the applications that you want to migrate.