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Method for assigning prefix label and SDN controller

A technology of prefix allocation and allocation method, which is applied in the field of prefix label allocation method and SDN controller, can solve problems such as complex implementation, and achieve the effect of simplifying the generation process and the delivery process

Active Publication Date: 2018-07-06
NEW H3C TECH CO LTD
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  • Abstract
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Problems solved by technology

However, this method may require each forwarding node in the network to run an extended IGP to realize the announcement of the SR label, which is more complicated to implement

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  • Method for assigning prefix label and SDN controller
  • Method for assigning prefix label and SDN controller
  • Method for assigning prefix label and SDN controller

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Embodiment Construction

[0025] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0026] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term...

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Abstract

The invention provides a method for assigning a prefix label and an SDN controller for performing the method. The method comprises the steps as follows: collecting a network topology to obtain an IP prefix of each forwarding node in the network topology; acquiring SRGB of each forwarding node; determining whether a common intersection exists in the SRGB of each forwarding node; if existing, assigning a globally unique prefix label to each IP prefix of each forwarding node from the common intersection; and issuing both the assigned prefix label and the IP prefix corresponding to the prefix label to each forwarding node in the network topology. By using the method, a prefix label is directly allocated in the SRGB intersection of the forwarding node by the SDN controller, the prefix labels ofthe IP prefix on each forwarding node are separately calculated with the SRGB of each forwarding node without an index, and the subsequent SDN controller delivers the same label information to different forwarding nodes for the same IP prefix, thereby simplifying the generation and delivery of the prefix labels.

Description

technical field [0001] The present application relates to SR technology, in particular to a prefix label allocation method and an SDN controller. Background technique [0002] Segment routing (Segment Routing, SR) technology is a method of routing based on source addresses. By encapsulating the SR labels of the nodes that a layer of path will pass through the message, when the message passes through the SR node, the SR node will use these SR labels Forward the message. Through the SR specified path forwarding function, network load balancing and process engineering, as well as complex network functions such as fast rerouting can be easily realized. [0003] The SR label advertisement and interaction in the IGP domain can be realized through an extended interior gateway protocol (Interior Gateway Protocol, IGP). However, this method may require each forwarding node in the network to run an extended IGP to advertise SR labels, which is relatively complicated to implement. ...

Claims

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Application Information

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IPC IPC(8): H04L12/723H04L45/50
CPCH04L45/507
Inventor 叶金荣饶小兵
Owner NEW H3C TECH CO LTD
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