Method and device for realizing MSTP multiprocess

Abstract

The invention provides a method and a device for realizing MSTP multiprocess. The method includes steps that STP protocol of a backbone region is operated in the backbone region consisting of a plurality of service provider edge devices, and the backbone region corresponds to main MST process; user edge devices are accessed to any two devices of the plurality of service provider edge devices to form a branch region, STP protocol of the branch region is operated in the branch region, and the branch region corresponds to auxiliary MST process; the backbone region calculates branch region which needs to eliminate loop in the branch region according to BPDU, and interdicts one link except a share link in the branch region which needs to eliminate loop. The invention divides a plurality of regions to independently operate different MSTP processes, each process operates different STP protocol, thereby eliminating different protocol types compatibility problem; topology change of single device only influences devices in same MSTP process; and the access of new user edge device does not influence original topology structure.

Description

technical field [0001] The invention relates to the spanning tree protocol, in particular to a method and device for realizing MSTP multi-process. Background technique [0002] In a Layer 2 switching network, the existence of network loops causes packets to circulate and proliferate continuously in the loop, resulting in broadcast storms, resulting in effective bandwidth being occupied by broadcast storms, and the network becomes unavailable. In response to the above situation, the Spanning Tree Protocol (Spanning Tree Protocol STP) came into being. STP selectively blocks redundant links in the network, and completes the spanning tree calculation according to the information contained in the Bridge Protocol Data Unit (Bridge Protocol Data Unit BPDU). The network is pruned into a tree, loops are eliminated and links are backed up. On the basis of STP, there are Rapid Spanning Tree Protocol (RSTP) to achieve rapid convergence of network topology and MSTP (Multi-Spanning Tree ...

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Problems solved by technology

[0002] In a Layer 2 switching network, the existence of network loops causes packets to circulate and proliferate continuously in the loop, resulting in broadcast storms, resulting in effective bandwidth being occupied by broadcast storms, and the network becomes unavailable.

[0005] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: in the prior art 1, all DSLAM rings participate in the calculation of an MSTP process, and the DSLAMs are easy to interact with each other, and the STP protocol that each different DSLAM ring runs The types may be different, and it is difficult for a single MSTP process to be compatible with all STP protocol types

[0006] In existing technology 2, all PEs and CEs run in one MSTP process, and any link change or node failure of any CE or PE will trigger all devices to respond to topology change events, making Layer 2 network management difficult; new CEs join the network , it needs to adapt to the STP protocol type already running on the PE device, and the addition of a new CE will cause the original network to respond to topology change events; when the Multi-Spanning Tree Protocol (MSTP) and STP, RSTP and other protocol types It will automatically adapt to the non-MSTP mode and lose the advantages of MSTP itself, and each instance of MSTP transmits information in the same BPDU, and the MSTP domain needs to be configured

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