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A fast rerouting method and device, transmission network

A routing and fast technology, applied in the Internet field, can solve problems such as the inability to quickly re-route IP packets

Active Publication Date: 2019-04-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, it has been found in practice that no matter which network link or which forwarding node on the active path fails in the above fast rerouting method, the IP packet will be switched to the same backup path for transmission, and finer-grained and more flexible routing cannot be achieved. Fast rerouting of IP packets

Method used

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  • A fast rerouting method and device, transmission network
  • A fast rerouting method and device, transmission network

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] The embodiment of the invention discloses a fast rerouting method, device and system, which can realize more fine-grained and more flexible fast rerouting of IP messages. Each will be described in detail below.

[0047] see figure 1 , figure 1 It is a flowchart of a fast rerouting method disclosed in an embodiment of the present invention. Such as figure 1 As shown, the fast rerouting method may include the following steps.

[0048] 1...

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Abstract

A fast rerouting method and device, and a transmission network, the method comprising: for an active forwarding node on an end-to-end active path, querying a qualified standby forwarding node from an end-to-end standby path as the active forwarding node The backup forwarding node of the backup forwarding node; wherein, the end-to-end main path and the backup path have no intermediate cross nodes; the interface information of the backup forwarding node is sent to the active forwarding node, so that the active forwarding node can detect the next-hop master When the active forwarding node fails or the network link between the active forwarding node and the next-hop active forwarding node fails, the active forwarding node switches the IP packets transmitted from one end according to the interface information of the backup forwarding node To the backup forwarding node, the backup forwarding node transmits the IP message to the other end on the backup path with the backup forwarding node as the starting forwarding node. The invention can realize more fine-grained and more flexible fast rerouting of IP messages.

Description

technical field [0001] The invention relates to the technical field of the Internet, in particular to a fast rerouting method and device, and a transmission network. Background technique [0002] In IP software-defined network (Software Defined Network, SDN), in order to improve network reliability, the main path and backup path are usually established between end-to-end, and under normal circumstances, the main path is used between end-to-end When the network link or forwarding node (such as a router) on the main path fails, the IP packet can be quickly switched (generally within 50ms) to the backup path for transmission to achieve IP Packet fast rerouting. [0003] However, it has been found in practice that no matter which network link or which forwarding node on the active path fails in the above fast rerouting method, the IP packet will be switched to the same backup path for transmission, and finer-grained and more flexible routing cannot be achieved. Fast rerouting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/703H04L45/28
Inventor 白涛于凤青庄顺万王丽丽欧阳沅斌
Owner HUAWEI TECH CO LTD
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