Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2008-04-22
2008-04-22
Lohn, Joshua A. (Department: 2114)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C714S004110
Reexamination Certificate
active
07363534
ABSTRACT:
A method and system for stateful switch-over in a high-availability point to point system is disclosed. The disclosed method includes in one embodiment detecting a change in state of a point to point link between a first peer data processing system and a second peer data processing system; storing state data for the point to point link with an active processor within the first peer data processing system in response to detecting the change in state; and transferring a copy of the state data to a standby processor within the first peer data processing system. The disclosed method includes in another embodiment, transferring data between the first peer data processing system and the second peer data processing system utilizing the active processor; detecting a switch-over condition; and transferring data between the first peer data processing system and the second peer data processing system utilizing the standby processor in response to detecting the switch-over condition.
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Haag Jeffrey D.
Krishnamurthy Ramesh
Campbell Stephenson LLP
Cisco Technology Inc.
Lohn Joshua A.
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