Fabric Manager Users Guide, Version 6.1, Revision A - QLogic

2–Advanced Fabric Manager Capabilities
Mesh/Torus Topology Support
Figure 2-5. 3D 3x3x3 Mesh Fabric Example
Another optimization for fabric latency is to add “wrap-around” or toriodal links.
These links connect the “edges” of the mesh to provide a shorter path when
nodes near one edge want to communicate to nodes near the other edge. For
example a two-dimensional 4x4 torus can appear as follows:
Figure 2-6. 2D 4x4 Torus Fabric Example
The QLogic Fabric Manager allows the use of torus links to be configured per
dimension. Some non-toroidal dimensions can simplify cabling or allow for greater
flexibility in terms of number of QoS levels or number of dimensions. For example
a two-dimensional 4x4 fabric with 1 Toroidal and 1 non-Toroidal dimension can
appear as follows:
IB0054608-01 B 2-11