Method and apparatus for expediting link convergence

Abstract

The invention relates to a link convergence accelerating method and device, adopting link state detection protocol to detect link state and obtaining link state variation information; according to the link state variation information, applying spanning tree protocol to make link convergence processing so as to quickly and accurately obtain transmission link state variation information, and thus assuring accuracy of topology calculation results and increasing the speed of link convergence processing.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for accelerating link convergence. Background technique [0002] Multiple Spanning Tree Protocol (MSTP) is a later version of Spanning Tree Protocol (STP). MSTP can make up for some shortcomings in STP and Rapid Spanning Tree Protocol (RSTP). MSTP can not only quickly converge, but also distribute the traffic of different virtual local area networks (VLANs) along their respective paths, thus providing a good load sharing mechanism for redundant links. [0003] MSTP divides a switching network into multiple domains, and multiple spanning trees are formed in each domain, and the spanning trees are independent of each other. Each spanning tree is called a multiple spanning tree instance (MSTI), and each domain is called a multiple spanning tree (MST) domain. [0004] MSTP associates VLANs with MSTIs by setting a VLAN mapping table (that is, a correspond...

AI Technical Summary

Problems solved by technology

However, because the physical status of the corresponding ports of the two connected routers is UP, but they cannot receive each other's BPDU messages, the final calculation result may be that both parties will send BPDU messages according to the priorities of other ports on the router. text, so that other normal links are in the Discarding state, resulting in topology calculation errors

[0009] In the process of realizing the present invention, the inventors found that the prior art has the following disadvantages: the current router using MSTP as the data link layer management protocol triggers the topology change process according to the physical state change of the port, and the perception of the link state change is relatively slow , and mainly based on hardware implementation, the scalability is poor, and it cannot meet the needs of high reliability of large-scale Layer 2 MAN or Layer 2 WAN bearer network

Because routers using MSTP cannot perceive changes in link status as early as possible, the speed of link convergence may be affected, and errors may occur

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