Retention of a stack address during primary master failover

Details Retention of a stack address during primary master failover Retention of a stack address during primary master failover

2004-12-30

2009-12-08

Ngo, Ricky (Department: 2416)

Multiplex communications

Fault recovery

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

C370S220000, C370S243000, C370S255000

Reexamination Certificate

active

07630299

ABSTRACT:
The present invention features embodiments of alleviating the impact to a system of stack switches, as well as to neighboring nodes communicating with such a system, when a primary master switch to secondary master switch failover occurs. The features of the present invention, generally enables a system of stack switches to retain, for a fixed or indefinite period of time, its stack address even when multiple primary master to secondary master failovers occur. This way recalculation of certain protocols—e.g., spanning trees and link aggregations—and updating of certain tables—e.g., address resolution protocol (ARP) and routing tables—are minimized.

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