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A Method of Enhancing Fault Fast Convergence in RSTP

A fast convergence and failure technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as difficult to meet the needs of practical applications and take a long time to achieve the effect of reducing convergence time and fast process processing

Active Publication Date: 2017-02-08
SHENZHEN NEW GREENNET TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Through the above interaction process, A and B resume communication. In the whole process, the replacement port Message Age timer of C needs to expire before re-election can be triggered. It takes a long time, usually a few seconds, and it is difficult to meet the needs of practical applications.

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  • A Method of Enhancing Fault Fast Convergence in RSTP
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  • A Method of Enhancing Fault Fast Convergence in RSTP

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Embodiment Construction

[0036] The present invention will be further described in detail with an embodiment below, but it should be noted that the protection scope of the present invention is not limited thereto.

[0037] In standard RSTP, when a BPDU message is received, only the better BPDU is processed (see the function received_config_bpdu(port_no,config) in IEEE Std 802.1D), and the worse BPDU is discarded.

[0038] In a network running spanning tree, root bridge information is transmitted from the root bridge to downstream devices. The root bridge is the upstream device, and other devices connected to it are its downstream devices. Among other adjacent devices, the one closest to the root bridge is It is the upstream device, and the far one is the downstream device, and the downstream device transmits to their downstream devices, and the diffusion is level by level. If a downstream device receives a worse BPDU message on the root port or an alternate port (these two types of ports will receive ...

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Abstract

The invention discloses a method for enhancing quick fault convergence in an RSTP. When a link fault occurs, a link can be recovered through interaction of three BPDU messages between equipment without waiting for message aging, therefore, the fault convergence time is greatly shortened and the requirement that in practical application, the convergence time must be within one second can be met.

Description

technical field [0001] The invention relates to the technical field of computer network communication, in particular to a method for enhancing fast fault convergence in RSTP (Rapid Spanning Tree Protocol, Rapid Spanning Tree Protocol). Background technique [0002] In the standard RSTP (reference standard document: ANSI / IEEE Std 802.1D, 1998Edition. "Part 3: Media Access Control (MAC) Bridges". 1998 and IEEE Std 802.1w-2001. "Part 3: Media Access Control (MAC) Bridges Amendment 2: Rapid Reconfiguration". 2001: 6-14). Multiple devices form a ring topology. When different link faults occur, the convergence time will vary greatly. Some faults take a long time to converge and cannot meet the requirements of fast convergence. requirements. [0003] refer to figure 1 , is a typical ring structure topology diagram, assuming three devices A, B, C (hereinafter referred to as A, B, C) spanning tree priority A is less than B less than C, after the spanning tree election is completed,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L29/06
Inventor 柳亮
Owner SHENZHEN NEW GREENNET TECH