Topology collection method and device

Abstract

The application provides a topology collection method and device. In the application, switching equipment actively transmits a topology collection message carrying an equipment identifier of equipment, a port identifier of a port and port QOS (Quality of Service) information to opposite-end equipment. When the opposite-end equipment receives the topology collection message, the opposite-end equipment generates a Packet-in message according to the received topology collection message and forwards the Packet-in message to an SDN (Self-Defending Network) controller, so that the SDN controller determines a port link between the switching equipment and the opposite-end equipment according to the Packet-in message, and takes the port QOS information carried in the Packet-in message as QOS information of the port link. Through adoption of the topology collection method and device, the SDN controller collects the QOS information of the port link while collecting port links between switching equipment in a whole network; the SDN controller is prevented from periodically acquiring the port links from the switching equipment; message interaction between the SDN controller and the switching equipment is reduced; and the overall efficiency of the network is increased.

Description

technical field [0001] The present application relates to network communication technology, in particular to a topology collection method and device. Background technique [0002] Software Defined Network (SDN: Software Defined Network) is a new type of network innovation architecture. Its core idea is to separate the control plane of network equipment from the forwarding plane to achieve flexible control of network traffic and provide core network and application innovation. good platform. [0003] In the SDN, the SDN controller periodically uses the Link Layer Discovery Protocol (LLDP: Link Layer Discovery Protocol) to collect the network topology of the entire SDN. The collected network topology indicates the connection status of the port links between the switching devices controlled by the SDN controller. Afterwards, when the SDN controller determines the forwarding path for the data flow, it will calculate the forwarding path from the source end of the data flow to t...

AI Technical Summary

Problems solved by technology

The forwarding path from the source end to the destination end of the data flow calculated by the SDN controller based on the collected network topology without considering the QoS information of the port link may not meet the QoS requirements of the data flow itself

Take the data flow QoS requirement as follows: the available bandwidth of each link on the forwarding path of the data flow is greater than the specified bandwidth M as an example, because the network topology collected by the SDN controller does not include the available bandwidth of each link, so SDN control will occur. The available bandwidth of a certain link on the forwarding path from the source end to the destination end of the data flow calculated by the controller based on the collected network topology is much lower than the specified bandwidth M, which affects data flow forwarding.

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