RS/6000 servers and pSeries servers might be attached to an SP system or might be configured in a cluster configuration (Clustered Enterprise Servers). The SP Switch2 PCI Adapter provides a solution to connect these nodes to an SPS2 in a single-plane or a two-plane configuration. The nodes benefiting are the SP-attached servers or switched CESs.The SP Switch2 PCI Attachment Adapter (F/C 8397) allows you to connect both legacy and new PCI-based servers to the SP Switch2. You can add more pSeries servers to take advantage of high-performance, high-bandwidth, server-to-server communications.