You configure production and sandbox Gateways using the
<Environments> element in the
<API-M_HOME>/repository/conf/api-manager.xml file in API Publisher nodes, as shown in the following example:
Figure: API Gateways in different geographical regions
Note that in addition to the configuration mentioned above, all the other required configuration for Publisher and other Components should be done. If you are using a multi-tenanted setup, would need to share the registry database mount with the Gateway Sandbox and Production nodes.