Redundant link management switch for use in a stack of...

Details Redundant link management switch for use in a stack of... Redundant link management switch for use in a stack of...

2008-01-15

2008-01-15

Pham, Chi (Department: 2616)

Multiplex communications

Fault recovery

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

C370S254000, C709S221000

Reexamination Certificate

active

10421805

ABSTRACT:
A stackable switch supporting redundant link and backup management. The stackable switch includes a stacking module, a processor and a management module. Several stackable switches can be stacked together in the form of a closed-loop link topology via the stacking module. The stacking module has an uplink port, a downlink port, and preferably a manual control device. The processor instructs the stacking module to enable or disable a downlink control bus within the downlink port when receiving a reconnect/disconnect command. If a link status, generated from the processor, indicates that these switches are stacked into the closed-loop link topology, the management module issues the disconnect command. Otherwise, the management module issues the reconnect command to recover a redundant link. Provided that the manual control device is activated, the management module in the same switch has the highest priority to become a master agent for the switch stack.

REFERENCES:
patent: 5805817 (1998-09-01), Yu et al.
patent: 6330245 (2001-12-01), Brewer et al.
patent: 6467006 (2002-10-01), Alexander et al.
patent: 6684258 (2004-01-01), Gavin et al.
patent: 6928049 (2005-08-01), Shabtay et al.

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