Three-layer topology determining method and device in SDN network

A technology of network equipment and topology, applied in the field of communication, can solve the problems that the three-layer topology of each network equipment cannot be obtained, the SDN controller cannot calculate the forwarding path, etc., and achieve the effect of complete control

Active Publication Date: 2015-01-14
NEW H3C TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In the prior art, the SDN controller can only obtain the physical topology between each network device, and calculate the forwarding path for each network device according to the physical topology,

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  • Three-layer topology determining method and device in SDN network
  • Three-layer topology determining method and device in SDN network
  • Three-layer topology determining method and device in SDN network

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[0036] In view of the problems in the prior art, an embodiment of the present invention provides a method for determining a three-layer topology in an SDN network, and the method is applied to an SDN network including an SDN controller and multiple network devices. To figure 1 It is a schematic diagram of an application scenario of an embodiment of the present invention. The SDN network includes an SDN controller, a network device 1, a network device 2, a network device 3, and a network device 4. In the above application scenarios, such as figure 2 As shown, the method for determining the three-layer topology in the SDN network may specifically include the following steps:

[0037] Step 201: The SDN controller receives a first LLDP packet from a first network device, and receives a second LLDP packet from a second network device. Among them, the first LLDP message is encapsulated in the first Packet-in message, and the content carried in the first LLDP message specifically inclu...

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Abstract

The invention discloses a three-layer topology determining method and device in an SDN network. The method includes the steps that an SDN controller receives a first LLDP message from a first network device, and the first LLDP message is packaged in first Packet-in information; the first LLDP message carries three-layer VLAN interface information of a second network device; the SDN controller receives a second LLDP message from the second network device, and the second LLDP message is packaged in second Packet-in information; the second LLDP message carries three-layer VLAN interface information of the first network device; the SDN controller determines the three-layer topology between the first network device and the second network device by means of the three-layer VLAN interface information of the second network device and the three-layer VLAN interface information of the first network device. According to the three-layer topology determining method, the SDN controller determines three-layer topologies between all the network devices by means of the three-layer VLAN interface information of all the network devices.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for determining a three-layer topology in an SDN (Software Defined Network, software-defined network) network. Background technique [0002] SDN (Software Defined Network, Software Defined Network) 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, so as to realize flexible control of traffic, and provide core network and application innovation. good platform. In an SDN network, it includes network devices (such as switches) and SDN controllers. The SDN controller is used to generate a flow table (Flow Table) according to the user's configuration or a dynamically running protocol, and send the flow table to the network device. The network device is used to receive the flow table from the SDN controller, and match and process packets according ...

Claims

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Application Information

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IPC IPC(8): H04L12/751H04L45/02
CPCY02D30/00
Inventor 宋小恒
Owner NEW H3C TECH CO LTD
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