Processing method for applying rapid spanning tree protocol to monocyclic network topology

Abstract

The invention discloses a processing method for applying a rapid spanning tree protocol (RSTP) to monocyclic network topology, and the processing method comprises following steps that two additional protocol fields are added into a BPDU (bridge protocol data unit), wherein a field A indicates the protocol type, a field B indicates topological variation information, if a port is invalid, the value of the field B is set to be true, and otherwise, the value of the field B is set to be false; after a switch receives the expanded BPDU, on one hand the field A is matched, when one or more switches do not support or are not configured into a monocyclic network working mode, all other switches on the network automatically run the standard rapid spanning tree protocol so as to cooperatively work; and on the other hand, the value of the field B is judged, if the value of the field B is true, an RSTP state machine transmits the BPDU with the true field value so as to notify a counter-side switch of link failure on the network, and each switch conducts the fault rapid restoration. Due to the adoption of the processing method, the cyclic network self-healing time in a monocyclic network topology when link failure exists can be shortened, simultaneously the standard RSTP can be automatically compatible, and the requirements of different kinds of communication services can be met.

Description

technical field [0001] The invention relates to communication network redundancy technology, in particular to a rapid spanning tree protocol applied to single-ring network topology. Background technique [0002] Spanning Tree Protocol (STP), Rapid Spanning Tree Protocol (RSTP), and Multiple Spanning Tree Protocol (MSTP) are topology management protocols applied to Layer 2 communication networks. Layer 2 switches run the Spanning Tree Protocol and send bridge protocol data units (Bridge Protocol Data Unit, BPDU) to each other. The main information in the BPDU includes STP version, BPDU type, identification field, root bridge ID, root path cost, and designated bridge ID , the designated port ID and each time value, wherein the root bridge ID, the root path cost, the designated bridge ID, and the designated port ID form a message priority vector, which is the main basis for RSTP comparison and calculation. The switch obtains the information in the BPDU, and cuts the network to...

AI Technical Summary

Problems solved by technology

[0011] It can be seen that when the RSTP protocol is used to manage the topology of a single ring network, the integrity and security of the network are guaranteed, but it cannot be processed according to the characteristics of the ring network topology and different types of packets, resulting in a long self-healing time of the ring network, which cannot meet the requirements. Ring network fast self-healing requirements

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