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Rapid rerouting method and device and transmission network

A kind of transmission network, fast technology, applied in the field of Internet, can solve the problem of unable to achieve fast re-routing of IP packets

Active Publication Date: 2014-11-19
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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  • Rapid rerouting method and device and transmission network
  • Rapid rerouting method and device and 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

Provided is a rapid rerouting method and device and a transmission network. The method comprises that aimed at a main forwarding node in an end-to-end main path, a standby forwarding node that satisfies conditions is inquired in an end-to-end standby path and used as a backup forwarding node of the main forwarding node, and no intermediate cross node exists between the main path and the standby path; and interface information of the backup forwarding node is sent to the main forwarding node, so that when the main forwarding node detects that a next main forwarding node has a fault or a network link between the main forwarding node and the next forwarding node has a fault, the main forwarding node switches an IP message from one end to the backup forwarding node according to the interface information of the backup forwarding node, and the backup forwarding node is used as an initial forwarding node in the standby path to transmit the IP message to the other end. Thus, rapid rerouting for IP messages in a finer granularity and higher flexibility can be realized.

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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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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