HP StorageWorks 2/140 - Director Switch Release Release - Pagina 8

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Supported Configurations

Operation of multiple switches in a fabric topology is subject to the following

topology limits. Consider the impact of these limits when planning the fabric.

Note:

High Availability Planning Guide

Note:

path, not the total number of ISL connections between devices.

For more information about planning the fabric, refer to

Fabric Elements – Each fabric element is defined by a unique domain ID that

ranges between 1 and 31; therefore, the theoretical limit of interconnected

directors in a single fabric is 31. The supported limit of interconnected

switches in a single fabric is 24. Because this number is subject to change,

contact your HP authorized service representative for the current number of

interconnected switches supported in a single fabric.

Inhomogeneous fabric – To determine if interoperability is supported for a

product, or if restrictions apply, refer to the product publications, or contact

your HP authorized service representative.

Number of Interswitch Links (ISLs) – The maximum supported number of

ISLs is 75% of installed ports for the director 2/64, and 50% of installed ports

for the director 2/140. For redundancy, at least two ISLs should connect any

two director-class fabric elements. Because this number is subject to change,

contact your HP authorized service representative for the current number of

ISLs supported per director.

Hop Count – The Fibre Channel theoretical limit of ISL connections

traversed (hop count) in a single path through a fabric is 7. The maximum

supported hop count in a single path through a fabric is 3. Because this

number is subject to change, contact your HP authorized service

representative for the current hop count supported by a single fabric path.

The hop count is equal to the number of ISL connections traversed in a single

HP StorageWorks SAN

Director Release Notes