Quickloop Topology - HP Surestore 6164 - Switch User Manual

QuickLoop Topology

Using QuickLoop
QuickLoop topologies have the following characteristics:
• A QuickLoop can include up to 2 switches and can support up to
126 devices.
• Each particular switch can only be included in one QuickLoop.
• A QuickLoop can include either all of, or a subset of, the ports on a
particular switch.
• Multiple quickloops can exist in a fabric of multiple switches.
• Switches with quickloops enabled can exist in the same fabric as
non-QuickLoop enabled switches.
• A device attached to a QuickLoop can communicate with all other
devices attached to the same QuickLoop.
• A private device in a QuickLoop can only communicate with devices in
the same QuickLoop. Existing PLDA capable host drivers need no
modification to perform I/O operations with storage devices.
• Public devices that are arbitrated loop capable are treated as private
devices when connected to QuickLoop ports. (The fabric login, or
"FLOGI," is rejected.)
• Legacy devices can be used in a QuickLoop and can be attached to a
fabric and operate as if in a PLDA environment.
• QuickLoop functionality can be enabled or disabled for either the entire
switch or for particular ports.
• Each looplet in a QuickLoop has its own unshared bandwidth and can
support transfer rates up to 100 MB/per second.
• Multiple devices can communicate simultaneously and at full
bandwidth within multiple looplets located in the same QuickLoop.
• If a looplet error is detected, QuickLoop automatically takes the looplet
out of service. If the error condition is cleared, the looplet is
automatically re-instated.
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