Method and apparatus for accelerating forwarding in software-defined networks
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United States of America Patent
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Jun 30, 2015
Grant Date -
Apr 10, 2014
app pub date -
Oct 8, 2012
filing date -
Oct 8, 2012
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Abstract
A network element acting as a forwarding plane within a software-defined network to reduce negative effects of slow-path packet processing is described. The network element, upon receiving a first packet, determines whether it matches any flow entry within a set of flow tables. When the first packet does not match any flow entry of the set of flow tables, the network element performs a miss procedure including inserting at least a portion of the first packet into a packet miss table of the network element, which is accessed by a controller. The controller may access the packet miss table using a pull mechanism. The miss procedure may also include accessing a configurable default rule table of the network element, which includes rules enabling limited forwarding for those packets that do not match any entry of the set of flow tables.
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