Supplementary header for multifabric and high port count...

Details Supplementary header for multifabric and high port count... Supplementary header for multifabric and high port count...

2004-01-29

2008-12-02

Marcelo, Melvin (Department: 2616)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S474000

Reexamination Certificate

active

07460537

ABSTRACT:
Accordingly, there is disclosed herein an augmented Fibre Channel (FC) frame format which may provide support for multiple fabric FC networks, and may improve the performance of modularly-constructed switches. In one embodiment, the augmented FC frame format is modulated on a carrier signal and the frame includes: a start-of-frame field; a supplementary header field that follows the start-of-frame field; a frame header field that follows the supplementary header field; a cyclic redundancy code (CRC) checksum field; and an end-of-frame field that follows the CRC checksum field. The supplementary header field may include a destination tag that identifies a target fabric to which the frame is directed. Alternatively, or in addition, the supplementary header field may include an egress port identifier that identifies a switch port through which the frame is to exit a switch. The supplementary header may also include flags to request special handling by the receiver.

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American National Standard of Accredited Standards Committee (NCITS), “Fibre Channel Fabric Generic Requirements (FC-FG),” Aug. 7, 1996, pp. i-23, Published by American National Standards Institute, New York, New York.
American National Standard of Accredited Standards Committee (NCITS), “Fibre Channel Switch Fabric-3 (FC-SW-3),” Jan. 24, 2002, pp. i-190, Published by American National Standards Institute, New York, New York.
American National Standard of Accredited Standards Committee (NCITS), “Fibre Channel Framing And Signaling (FC-FS),” Feb. 8, 2002, pp. i-575, Published by American National Standards Institute, New York, New York.
American National Standard of Accredited Standards Committee (NCITS), “Fibre Channel Backbone (FC-BB-2),” Mar. 6, 2002, pp. i-118, Published by American Standards Institute, New York, New York.

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