Method and exchange equipment for preventing old information message circulation in MSTP (Multiple Spanning Tree Protocol)

Abstract

The invention provides a method for rapidly cutting off the circulating transfer of an old invalid BPDU (Bridge Protocol Data Unit) message in a network when the network is changed and ensuring that other embodiments in the message are continuously processed in a complex environment of a MSTP (Multiple Spanning Tree Protocol) and exchange equipment for realizing the method. The traditional old information message circulating process is improved; when the information of the embodiment in the BPDU message in a domain, which is received by a port, is better, and a domain root of the embodiment carried in the message is the exchange equipment, the exchange equipment actively sets the port not to be participated in the root port selection of the embodiment, thereby effectively preventing the circulating transfer of the invalid old message without completely discarding the circulating message, just enabling the information of the embodiment in the message not to be participated in the root port selection and avoiding error states, such as port state conflict detection or information discarding of other embodiments, and the like due to complete discarding. The invention provides the method and the exchange equipment for preventing old information message circulation in the MSTP.

Description

technical field [0001] The invention relates to the convergence technology of the spanning tree protocol in the switching equipment, and is suitable for MSTP (Multi Spanning Tree Protocol, multiple spanning tree protocol). Background technique [0002] Spanning tree protocol is the basic protocol in Layer 2 switches, and it is also one of the most frequently used protocols. Its main function is to ensure that there will be no loops in the network, and to provide redundant backup links at the same time. However, when the network environment and configuration are complex, the convergence speed is sometimes slow due to the limitations of the protocol itself, and as the complexity of the environment increases, the network oscillation time increases when the topology changes. In some environments, the old root information will remain in the topology, causing the devices to fail to quickly converge until the old information fails. The time for the old information to fail is in th...

AI Technical Summary

Problems solved by technology

Although the above method can accelerate the convergence of the MSTP network topology in a multi-domain environment, completely discarding the message will cause other instances in the message to be discarded by mistake.

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