Switchover system and method in a data packet switching network
First Claim
1. In a data packet switching system for transmitting data packets comprising at least a data packet identifier, through a switching arrangement comprising at least an active switch card associated to a backup switch card for simultaneously receiving at least a data packet and for transmitting said at least data packet from the active switch card and from the backup switch card to a network adapter device, a switchover system comprising:
- active and backup means (750/850) for respectively storing at an active and backup data packet address said transmitted at least data packet;
switchover detecting means (100/200,500) coupled to the active and backup storing means for detecting a switchover event; and
control means (300/400,500,600) coupled to the active and backup storing means and to the switchover detecting means for setting the backup storing means when a switchover event is detected.
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Accused Products
Abstract
A switchover system and method is described. The invention preferably operates in a data packet switching system for transmitting through a switching arrangement data packets that comprise at least a data packet identifier. The switching arrangement comprises at least an active switch card associated to a backup switch card. And the active switch card and the backup switch card receive simultaneously at least a data packet and transmit it to a network adapter device. The switchover system comprises active and backup means for respectively storing at an active and backup data packet address the transmitted at least data packet. It also comprises switchover detecting means coupled to the active and backup storing means for detecting a switchover event, and control means coupled to the active and backup storing means and to the switchover detecting means for setting the backup storing means when a switchover event is detected.
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Citations
10 Claims
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1. In a data packet switching system for transmitting data packets comprising at least a data packet identifier, through a switching arrangement comprising at least an active switch card associated to a backup switch card for simultaneously receiving at least a data packet and for transmitting said at least data packet from the active switch card and from the backup switch card to a network adapter device, a switchover system comprising:
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active and backup means (750/850) for respectively storing at an active and backup data packet address said transmitted at least data packet;
switchover detecting means (100/200,500) coupled to the active and backup storing means for detecting a switchover event; and
control means (300/400,500,600) coupled to the active and backup storing means and to the switchover detecting means for setting the backup storing means when a switchover event is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a data packet switching system for processing a plurality of data packets through a switching arrangement, each data packet comprising at least a data packet identifier, the switching arrangement comprising at least an active switch card associated to a backup switch card for simultaneously receiving the plurality of data packets and for simultaneously transmitting the plurality of data packets from the active switch card and from the backup switch card to a network adapter device, a switchover method operating within the network adapter device comprising the steps of:
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a. storing each incoming data packet at an active and a backup data packet address of an active and a backup memory respectively;
b. enqueuing into an active and a backup input queue respectively each at least data packet identifier along with the corresponding active and backup data packet address;
c. outputting each stored data packet from the active memory when no switchover event is detected;
d. when a switchover event is detected, retrieving from the active input queue the last data packet identifier validly enqueued;
e. searching for the corresponding last data packet identifier validly enqueued into the backup input queue;
f. enabling the outputting of the incoming data packets from the backup memory. - View Dependent Claims (9, 10)
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Specification