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In-band control connection establishment method and device in SDN

A software-defined network and connection establishment technology, applied in the field of an in-band control connection establishment method, forwarding device, and controller, can solve the problem that the OpenFlow controller cannot simply obtain the in-band networking topology, cannot process it, and discards OpenFlow protocol packets. and other problems to achieve the effect of in-band network topology discovery

Active Publication Date: 2014-04-30
NEW H3C TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0012] OpenFlow switches cannot automatically discover controllers in the network in-band, and additional configuration is required
The OpenFlow controller cannot simply obtain the topology of the in-band network
All OpenFlow protocol packets are received and processed in the same process. A large number of packet-out packets will occupy the CPU resources of the OpenFlow switch and may cause other more important OpenFlow protocol packets to be discarded and cannot be processed.

Method used

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  • In-band control connection establishment method and device in SDN
  • In-band control connection establishment method and device in SDN
  • In-band control connection establishment method and device in SDN

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Embodiment Construction

[0048] The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0049] For the sake of clarity, at first the following terms appearing in the present invention are explained:

[0050] Packet-in: The forwarding device encapsulates the received packet in a Packet-in packet, and sends the Packet-in packet to the controller through the SDN control link. The packet will mark the packet received by the forwarding device The input port of the text.

[0051] Packet-out: The controller encapsulates the packet in a Packet-out packet, sends the Packet-out packet to the forwarding device through the SDN control link, and informs the forwarding device how to process the Packet-out packet through the packet packets encapsulated in .

[0052] figure 1 The flow chart of the method for establishing an in-band control connection in SDN provided by the embodiment of the present invention, such as figure 1 As s...

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Abstract

The invention provides an in-band control connection establishment method and device in an SDN. The method comprises the steps that according to forwarding devices of enabled in-band controllers in the SDN, the forwarding devices periodically send two-layer SDN protocol Hello messages outwards from SDN protocol ports of the forwarding devices respectively, and a destination MAC address of each massage points to the corresponding controller; after the forwarding devices receive destination MAC addresses sent by the controllers, and the MAC addresses are the unicast two-layer SDN protocol messages of the MAC addresses of the forwarding devices, two-layer in-band ports of the controllers are recorded; after the forwarding devices receive the Hello messages with the destination MAC addresses, pointing to the controllers, from the other forwarding devices, the messages are forwarded to the controllers through the two-layer in-band ports. According to the in-band control connection establishment method and device in the SDN, the in-band control connection between the forwarding devices and the controllers is automatically established.

Description

technical field [0001] The present invention relates to the technical field of software defined network (SDN, Software Defined Network), in particular to a method for establishing an in-band control connection in a software defined network, a forwarding device, and a controller. Background technique [0002] For the convenience of understanding, the following description is first given: [0003] SDN: The biggest difference between SDN and traditional networks is the separation of the control plane and the network forwarding plane. The network forwarding plane will no longer have control functions, and the control plane will be handed over to an operating system independent of the forwarding plane. The features are based on The operating system is customized. [0004] OpenFlow: It is a communication interface standard that defines the communication interface between the controller (Controller) and the forwarding layer in the SDN architecture. OpenFlow allows direct access a...

Claims

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Application Information

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IPC IPC(8): H04L12/801
Inventor 王云毅
Owner NEW H3C TECH CO LTD
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