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Connectivity from metro node to database servers is referred to as metro node frontend connectivity, while connectivity from metro node to storage arrays is referred to as metro node backend connectivity. Both types of connectivity have their own set of requirements and design limitations. For more information about the connectivity requirements, design considerations, and design limitations, see VPLEX: SAN Connectivity.
For this paper, a dual fabric was used. Front-end I/O modules on each director of both appliances had a minimum of two physical connections, one to each fabric. Each host had one path to the A director and one path to the B director of each metro node appliance, on each fabric, for a total of four logical paths per metro node appliance. Host multipathing was used for access across the dual fabrics and provided redundant access to each LUN from a minimum of A and B directors from each fabric.
Backend connectivity, including zoning, was performed as part of the initial deployment and configuration of metro node and is not covered in this document.
For an Oracle RAC Standalone Cluster, connectivity and zoning must be performed for each of the database servers and the metro node cluster chosen to host the database. For additional information, see References and Figure 4.