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Topology collection method and device

A topology and port technology, applied in the field of network communication, can solve problems such as not meeting the QoS requirements of data flow and affecting data flow forwarding, so as to reduce message interaction and improve overall efficiency

Active Publication Date: 2018-04-06
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Embodiment Construction

[0028] In SDN, topology collection packets (such as LLDP packets) are actively sent by the SDN controller to each switching device controlled and managed by the SDN controller, so as to be used by the SDN controller for link discovery and topology calculation.

[0029] In this application, the topology collection message (such as the LLDP message) is actively sent by the switching device. text), which reduces the message interaction between the SDN controller and the switching device, and improves the efficiency of network topology collection. pass below figure 1 Describe the method provided by this application:

[0030] see figure 1 , figure 1 It is a flow chart of a topology collection method provided in this application. This process is applied to a switching device (referred to as the first switching device). Here, the first switching device generally refers to any switching device in the SDN, which is just named for the convenience of distinguishing the switching dev...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/931H04L12/935H04L12/937H04L12/24H04L49/111
CPCH04L41/12H04L49/20H04L49/205H04L49/253H04L49/30
Inventor 宋小恒
Owner NEW H3C TECH CO LTD
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