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McDATA Products in a SAN Environment - Planning Manual
Planning Considerations for Fibre Channel Topologies
Figure 3-8 Tape Drive Consolidation
Fabric Topologies
Several topologies exist from which to build a Fibre Channel fabric
infrastructure. This section describes the most effective fabric
topologies and provides guidance on when to deploy each topology.
The topologies are effective for a wide variety of applications, are
extensively tested by McDATA, and are deployed in several customer
environments. Fabric topologies described in this section include:
•Mesh.
• Core-to-edge.
•Fabric (SAN) islands.
Mesh Fabric
There are two types of mesh fabrics: full mesh and modified (or
partial) mesh. In a full-mesh topology, every director or switch is
directly connected to all directors and switches in the fabric. The
maximum hop count between fabric-attached devices is one hop.
Figure 3-9 illustrates the topology.
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