FW 05.01.00 and SW 07.01.00 HP StorageWorks SAN High Availability Planning Guide (AA-RS2DC-TE, June 2003)

Planning Considerations for Fibre Channel Topologies
95SAN High Availability Planning Guide
Subject to large fabric design constraints, core-to-edge fabrics are easy to scale
through the addition of core elements. Figure 40 illustrates a core-to-edge fabric
topology with four core directors and twelve edge directors and switches
(4-by-12 topology).
Figure 40: 4-by-12 Core-to-Edge fabric
A core-to-edge topology offers any-to-any device connectivity, and evenly
distributes traffic bandwidth throughout the fabric. The topology provides the
most flexible architecture to address fabric performance, traffic locality, data
integrity, connectivity, and scalability requirements.
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Interswitch Link
Fabric Connection
Tier 3 Devices
Edge
Switches
Tier 1
Devices
Edge
Switches
Core
Directors
Core
Directors
Tier 1
Devices
Tier 3 Devices