Prerequisites 
The prerequisites for implementing a federated portal network across a SAP NetWeaver 7.0 and SAP NetWeaver Composition Environment 7.1 landscape are as follows:
The producer portal is running SAP NetWeaver Composition Environment 7.1 and you have completed the basic initial configuration steps of the portal.
More information: Configuring the Portal
Consumer portals are running SAP NetWeaver 7.0.
Non-SAP producer and consumer portals are WSRP-compliant.
For each SAP NetWeaver 7.0 portal, you have installed usage type EP Core (EPC) and completed the initial configuration steps.
The user bases of all portals in the network adhere to the requirements described in User Persistence.
You have an extensive understanding of the permission model in the portal. Aspects of implementing a federated portal network rely on configuring permissions.
More information: Portal Permissions