Method and apparatus for managing a loop network

Details Method and apparatus for managing a loop network Method and apparatus for managing a loop network

2007-09-11

2007-09-11

Vu, Huy D. (Department: 2616)

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

C370S222000, C370S223000, C370S403000, C370S405000, C370S453000, C370S254000

Reexamination Certificate

active

10150580

ABSTRACT:
A method and apparatus for managing a loop network, the loop network (200) including at least one loop (206, 208), a plurality of devices (210) connected to the at least one loop (206, 208) via ports (211, 212), wherein at least two of the devices are initiators (207, 209). The method includes each initiator (207, 209) sending a frame to all other initiators (207, 209) in the loop network (200) identifying any ports (211, 212) which should not be used. Each initiator (207, 209) merges the information from all other initiators (207, 209) with its own information identifying any ports (211, 212) which should not be used resulting in all the initiators (207, 209) generating a single list of ports (211, 212) to be used which is consistent across all the initiators (207, 209). Each initiator (207, 209) applies an algorithm (300) to determine a common set of ports (211, 212) to be used by all the initiators (207, 209) and to balance port accesses across the loop network (200).

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American National Standard for Information Technology “Fibre Channel Arbitrated Loop (FC-AL-2) Revision 7.0”, Apr. 1, 1999.

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