HP StorageWorks 64 FW 07.00.00/HAFM SW 08.06.00 McDATA Products in a SAN Envir - Page 100
Fabric Topologies, Mesh Fabric
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Planning Considerations for Fibre Channel Topologies 3 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. 3-14 McDATA Products in a SAN Environment - Planning Manual