Fibre channel arbitrated loop bufferless switch circuitry to...

Details Fibre channel arbitrated loop bufferless switch circuitry to... Fibre channel arbitrated loop bufferless switch circuitry to...

2008-04-29

2008-04-29

Nguyen, Steven (Department: 2619)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S450000, C370S462000

Reexamination Certificate

active

10348642

ABSTRACT:
A switch, switched architecture and process for transferring data through an FCAL switch is disclosed. The switch uses multiple switch control circuits each coupled to one FCAL network and all connected to a crossbar switch. The switch control circuits are coupled together by a protocol bus for coordination purposes. Local conversations can occur on each FCAL loop and crossing conversations through the switch can occur concurrently. The OPN primitive is used to establish the connection before any data is transferred thereby eliminating the need for buffer memory in the switch control circuits. The destination address of each OPN is used to address a lookup table in each switch control circuit to determine if the destination node is local. If not, the destination is looked up and a connection request made on the protocol bus. If the remote port is not busy, it sends a reply which. causes both ports to establish a data path through the backplane crossbar switch.

REFERENCES:
patent: 4930121 (1990-05-01), Shiobara
patent: 5566177 (1996-10-01), Bhandari et al.
patent: 5689644 (1997-11-01), Chou et al.
patent: 6073132 (2000-06-01), Gehman
patent: 6396832 (2002-05-01), Kranzler

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