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Figure 1-20 System third level interconnect
Integrated cluster fabric interconnect
A complete Power 775 system configuration is achieved by configuring server nodes into a
tight cluster by using a fully integrated switch fabric.
The fabric is a multitier, hierarchical implementation that connects eight logical nodes
(octants) together in the physical node (server drawer or CEC) by using copper L-local links.
Four physical nodes are connected with structured optical cabling into a Supernode by using
optical L-remote links. Up to 512 super nodes are connected by using optical D-links.
Figure 1-21 on page 34 shows a logical representation of a Power 775 cluster.
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Chapter 1. Understanding the IBM Power Systems 775 Cluster
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