Processing requests in a network control system with multiple controller instances
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United States of America Patent
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Apr 14, 2015
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N/A
app pub date -
Aug 26, 2011
filing date -
Jul 6, 2010
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Abstract
A control system that includes several controllers for managing several switching elements. A first controller receives a request to modify a data tuple stored in a network information base (NIB) storage of the first controller that stores data for managing a set of switching elements. The first controller determines whether the received request to modify should be processed by the first controller. When the received request should be modified by the first controller, the first controller modifies the set of data in the NIB storage. The first controller updates a request list that is propagated between the controllers to disseminate requests to modify different data tuples that are stored in the NIB storages of the different controllers.
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