HP StorageWorks 8B - FC Entry Switch Manuel de l'utilisateur - Page 15

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Each looplet in a QuickLoop has its own unshared bandwidth and can support transfer rates up

to 200 MB/sec.

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Multiple devices communicate simultaneously between at least 4 separate switch ports, at full

bandwidth within multiple looplets located in the same QuickLoop. These simultaneous

conversations cannot involve overlapping looplets.

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If a looplet error is detected, QuickLoop automatically takes that looplet out of service. If the

error condition is cleared, the looplet is automatically reinstated.

QuickLoop Implementation

QuickLoop is implemented by a combination of hardware and software components, and requires

no actions on the part of the user once it is installed and configured. The hardware components are

responsible for the transport of frames among looplets and across switches, and the software

components are responsible for QuickLoop initialization and error handling.

The terms and concepts introduced in this section are fundamental to understanding the use of

QuickLoop mode.

Switch terminology

The following two port types are on host or storage devices, not on switches.

There are 8 or 16 on varying models of switches; certain models constrain the type of port the

switch can support. Each port can be independently configured as one of various types:

QuickLoop User's Guide

N_port

(Node port) An equipment port that is not loop capable. Used to connect the

equipment to the fabric.

NL_port

An equipment port that is loop capable. Used to connect an equipment port to the

fabric in a loop configuration through the FL_Port on a switch.

F_port

A fabric port that is not in loop mode. Able to transmit under fabric protocol, and

interface over links. N_Ports on equipment connect to F_Ports on switches.

FL_port

A fabric port on a switch that is in loop mode. Used to connect loop capable NL_Ports

to the switch in a loop configuration.

Using QuickLoop

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