HP Surestore 64 FW 05.01.00 and SW 07.01.00 HP StorageWorks SAN High Availabil - Page 114
Multiple Data Transmission Speeds in a Single Fabric, The Director 2/64, Edge Switch 2/16
View all HP Surestore 64 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 114 highlights
Planning Considerations for Fibre Channel Topologies Multiple Data Transmission Speeds in a Single Fabric The Director 2/64, Edge Switch 2/16, and Edge Switch 2/32 support auto-sensing of 1.0625 and 2.125 Gbps device connections. The introduction of a higher data transmission speed to the SAN design provides several benefits and alternatives: ■ High-speed device connectivity - As Fibre Channel devices and HBAs evolve and become 2.125 Gbps-capable, higher-speed switches are required to provide basic fabric connectivity. ■ Better fabric performance - As a connection between edge switches, a 2.125 Gbps ISL delivers double the bandwidth of a 1.0625 ISL. Fibre Channel devices that are not 2.125 Gbps-capable benefit from a higher-speed ISL, because 1.0625 Gbps traffic is multiplexed and transmitted through the 2.125 Gbps ISL. ■ Additional port count - If additional ISL bandwidth is not required for fabric performance, 2.125 Gbps connectivity allows the number of ISL connections to be reduced, thus yielding additional director or switch ports for device connectivity. When installing 2.125 Gbps-capable fabric elements in a core-to-edge topology, deploy the directors or switches at the fabric core to provide end-to-end high-speed ISL capability. If 2.125 Gbps device connectivity is required, attach the devices to the core director or switch as Tier 1 devices. If possible, employ device locality by connecting 2.125 Gbps devices to the same director or switch. 114 SAN High Availability Planning Guide