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US 9,319,241 B2Granted
Flow-based packet transport device and packet management method thereof
AssigneeElectronics and Telecommunications Research Institute
InventorsSaehoon Kang, Sunhee Yang
Life of this patent
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Abstract
Disclosed is a packet managing method of a packet forwarding device. The packet managing method includes receiving a packet; extracting flow information from the packet; searching a flow entry associated with the packet; and requesting the flow entry associated with the packet to a controller when a searching operation of the flow entry is failed. The request on the flow entry associated with the packet is not transferred within a reference time.
Claims11
A packet managing method of a packet forwarding device, comprising:
- receiving a packet;
- extracting flow information from the packet;
- searching a flow entry associated with the packet;
- searching a flow entry request table, when a flow entry associated with the packet is not found, to judge whether a request on another flow entry corresponding to the same flow is transferred to the controller within a reference time or not;
- reserving a request of transmitting the flow entry associated with the packet when a request on the other flow entry corresponding to the same flow is transferred to the controller within the reference time;
- and
- transferring the request of transmitting the flow entry associated with the packet to a controller after the reference time,
- wherein when the request on the flow entry associated with the packet is determined to already be transferred to the controller once, the request is not repeatedly transferred within a reference time.
5 more elements
A packet forwarding device comprising:
- a flow table configured to store a plurality of flow entries;
- a flow entry request table configured to store a plurality of flow entry requests;
- a flow search part configured to search a flow entry for a received packet in the flow table;
- a flow processing part configured to process the received packet according to a procedure corresponding to the searched flow entry;
- a flow table management part configured to manage a flow entry for each of flows in the flow table;
- and
- a flow entry request processing part configured to transmit a flow entry request associated with the received packet, to a controller, based on whether the flow entry request corresponding to the same flow exists in the flow entry request table within a reference time with respect to the received packet that a searching operation of a corresponding flow entry by the flow search part is failed,
- wherein, when the flow entry request associated with the received packet is determined to already be transferred to the controller once, the request is not repeatedly transferred within the reference time,
- wherein the flow entry request associated with the received packet is reserved when a request on the other flow entry corresponding to the same flow is transferred to the controller within the reference time;
- and the flow entry request associated with the received packet is transferred to a controller after the reference time.
7 more elements
Dependencies are inferred from the claim text.