OpenFlow routing and switching equipment and its processing method for data packets

Abstract

The invention discloses an OpenFlow routing switching device and its processing method for data messages. The method includes: responding to receiving an ingress data message, parsing the ingress data message; combining the parsed ingress data message with the The flow entry in the macro flow table is matched; in response to the parsed ingress data packet matching the flow entry in the macro flow table, the start long flow detection associated with the flow entry in the macro flow table is executed action; and in response to the ingress data packet being judged to belong to a long flow in the long flow detection, notify the OpenFlow controller connected to the OpenFlow routing and switching device to detect a long flow, and send a message from the OpenFlow controller The flow entry of the microflow table located in the SRAM is received, and the flow entry of the microflow table is related to the feature value in the ingress data packet corresponding to the detected long flow. The routing switching device and the method thereof reduce the cost of the OpenFlow routing switching device, and enable the OpenFlow controller to optimize the flow forwarding path.

Description

technical field [0001] The present invention relates to network technology, more specifically, to an open flow routing switching device and a processing method for data packets. Background technique [0002] In the network, Long-lived Flow is also called elephant flow, which refers to the packet flow corresponding to those network connections that survive for a long time and require a large amount of data transmission. For example, FTP downloads a certain video files, the packet flow corresponding to this FTP connection can be regarded as a long flow. Short-lived Flow (Short-lived Flow), also known as mouse flow (mice flow), its characteristics are exactly the opposite of long-lived flow, and refers to the packet flow corresponding to the network connection whose connection survival time is very short and the amount of data is small. For example, a web request usually transmits the data volume of several packets between the client and the server to complete a session, which...

AI Technical Summary

Problems solved by technology

Existing OpenFlow routing and switching devices generally use TCAM to implement OpenFlow flow tables, because TCAM has the advantages of fast search, simple operation, and support for mask matching, but it has three obvious disadvantages at the same time: high cost, power consumption Yamato table entry update is complex

In addition, the existing OpenFlow routing and switching equipment integrates control devices such as message parsing, matching, and execution, as well as TCAM for implementing flow tables, and even communication devices into the ASIC chip, which is limited by the limitations of ASIC hardware technology, cost, and power consumption. Considering the size and other aspects, ASIC developers generally only integrate a small amount of TCAM in traditional routing and switching equipment, and the existing routing and switching equipment cannot monitor long traffic

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