HP Surestore 64 FW 05.01.00 and SW 07.01.00 HP StorageWorks SAN High Availabil - Page 95
by-12 Core-to-Edge fabric, most flexible architecture to address fabric performance
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Planning Considerations for Fibre Channel Topologies 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). Tier 3 Devices TM 10/100 RST TM PWR ERR TM 10/100 RST 31 29 27 25 23 TM 21 19 17 15 30 28 26 24 22 20 18 16 14 13 11 9 7 5 3 1 12 10 8 6 4 2 0 PWR ERR 10/100 RST TM PWR ERR Edge TM Switches Tier 1 Devices TM Core Directors TM 10/100 RST TM PWR ERR TM 10/100 RST 31 29 27 25 23 21 19 TM 17 15 30 28 26 24 22 20 18 16 13 11 9 7 5 3 1 14 12 10 8 6 4 2 0 PWR ERR TM Core Directors TM Tier 1 Devices Edge Switches TM TM 10/100 RST 31 29 27 25 23 21 19 TM 17 15 30 28 26 24 22 20 18 16 13 11 9 7 5 3 1 14 12 10 8 6 4 2 0 PWR ERR Interswitch Link Fabric Connection Tier 3 Devices 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. SAN High Availability Planning Guide 95