International Business Machines Corporation

Tejas S Nevrekar

Dayavanti G Kamath

A controller of a software-define network receives a notification of a change to a configuration of data delivery devices of the network. In response, the controller determines whether flows of respective flow tables of the data delivery devices are affected by accessing flow mappings maintained in a memory of the controller. The respective flow tables of the data delivery devices affected by the configuration change include a pattern of information fields and actions that corresponds to a pattern of information fields and actions of the flow mappings in the memory of the controller. The controller sends instructions to the affected data delivery devices to perform an asynchronous activity on the respective flow tables that includes a cleanup of the flows of the respective flow tables of the affected data delivery devices, performed in repetitive sweeps of the one or more data delivery devices, until completion of the cleanup.

Low latency flow cleanup of openflow configuration changes

One or more processors receive a notification of a failure of a first delivery device of a plurality of delivery devices of an OpenFlow network, to deliver a data packet. One or more processors determine the flows of flow tables belonging to delivery devices that are affected as a result of the failure of the first delivery device. The flows are determined by accessing an index of flow mappings maintained in cache storage in which at least one of the affected flows includes a pattern of information fields and actions that match a pattern of information fields and actions of the data packet, and one or more processors send instructions to the delivery devices of the network to perform an asynchronous activity on respective flow tables of the delivery devices that include the flows affected as a result of the failure of the first delivery device.

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Bengaluru, India

Tejas S Nevrekar