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release notes - edge switch 2/32
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: For more information about planning the fabric, refer to hp StorageWorks product in a
SAN environment - planning guide for director 2/64, edge switch 2/16, and edge switch 2/32.
•
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
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 representative.
•
Number of Interswitch Links (ISLs)—Theoretically, the ISL limit per edge switch
2/32 is 16. The maximum supported number of ISLs per switch is 16 (half of the
switch ports). For redundancy, at least two ISLs should connect any two
switch-class fabric elements. Because this number is subject to change, contact
your HP representative for the current number of ISLs supported per switch.
•
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 representative for the current hop count supported by a single
fabric path.
NOTE: The hop count is equal to the number of ISL connections traversed in a single path, not
the total number of ISL connections between devices.
Cable Requirements
IMPORTANT: Please note that optical cables for the edge switch 2/32 must be ordered
separately.
For cables measuring 500 meters or less, use multi-mode Fibre Channel cables. For
cables longer than 500 meters, use single-mode Fibre Channel cables.
Multi-mode optical cables are connected to short-wave optical transceiver modules in
a switch. Single-mode optical cables are connected to long-wave optical transceiver
modules in a switch. Multi-mode cables should use 50/125 optical fibers, and
single-mode cables typically use 9/125 optical fibers for distances up to 10 km.
release notes - edge switch 2/32
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