MSTP-based (Multiple Spanning Tree Protocol) network topology convergence method, equipment and system

Abstract

A multiple spanning tree protocol (MSTP) network topology convergence method is disclosed in the embodiment of the invention. The method comprises: a network device acquires through a target port a Bridge Protocol Data Unit (BPDU) message carrying spanning tree protocol (STP) information and updates the STP information of the target port; the network device compares the common root information contained in the STP information of other reception ports with the common root information contained in the acquired STP information, and compares region root information contained in the STP information of the other reception ports with the region root information contained in the acquired STP information; and the network device updates the external path overhead of those reception ports of the other reception ports found through comparison to be consistent into the overhead indicated by the external path overhead information contained in the acquired STP information. Correspondingly, a network device and a system are also disclosed in the embodiments of the invention. With the embodiments of the invention, invalid BPDU messages can be avoided in an MSTP multi-region networking environment with complicated networks, and thus rapid convergence can be implemented among the network devices.

Description

technical field [0001] The invention relates to the communication field, in particular to a method, device and system for network topology convergence of multiple spanning tree protocols. Background technique [0002] Spanning Tree Protocol (Spanning Tree Protocol, STP) is a basic protocol in Layer 2 network devices. The main function of this protocol is to ensure that there will be no loops in the network and to provide redundant backup links at the same time. In a multiple-spanning tree protocol (Multiple Spanning Tree Protocol, MSTP) multi-domain networking environment where the network is relatively complex, due to the flaws of the current MSTP standard, invalid Bridge Protocol Data Unit (Bridge Protocol Data Unit, BPDU) information may be caused Remains in the topology, causing rapid convergence among devices until the old BPDU information becomes invalid. Specifically as follows: [0003] A, B, and C network devices form a ring network at the aggregation layer, C, D,...

AI Technical Summary

Problems solved by technology

[0008] To sum up, in an MSTP multi-domain networking environment with a relatively complex network, invalid BPDU messages will remain, resulting in inability to quickly converge between network devices.

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