Description
Rule
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number
The supported limit of interconnected switches in a single fabric is 31, provided that any Edge
Switch 2/32 or Director 2/64 in the fabric is deployed at the edge of the fabric.
2
In fabric configurations exceeding 1,500 devices, use Edge Switch 2/32 and Director 2/64 at
the edge of the fabric.
3
A maximum of three switch hops (four switches) is supported between any two devices.4
A ring fabric topology is supported with a maximum of seven M-series switches.5
Assign a unique domain number (domain ID) and a unique WWN to each switch. The switch
configuration parameters must be the same for each switch.
Do not configure any switches with a domain ID of 8, which is reserved for HP-UX.
6
HP requires that all switches in a single-fabric SAN or multi-fabric SAN use the same firmware
version for the same switch models. You can use two successive switch firmware versions
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temporarily in one fabric or multiple fabrics when updating switch firmware.
7
NOTE:
Not all topologies can support the maximum port or switch count.
ISL maximums
When designing a fabric using 12-port, 16-port, 24-port, and 32-port switches, all ports can be used
as ISLs, with a maximum of one half of the total ISL port count configured to the same destination
switch.
NOTE:
The Edge Switch 2/12 requires licensing to enable ISL ports.
SAN Design Reference Guide 163
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