Topology change message transmitting and processing method and network equipment

Abstract

The application discloses a topology change message transmitting and processing method. The method comprises the following steps: second network equipment receives a first topology change message sent by adjacent first network equipment which judges the change of a network topology, and the first topology change message carries a first network equipment mark and a first topology change mark; the second network equipment searches the topology change marks of corresponding network equipment, recorded locally, according to the first network equipment mark carried by the first topology change message and judges whether the first topology change message is a repeated topology change message from the first network equipment according to whether the found topology change mark is the same as the first topology change mark carried by the first topology change message; and if yes, the second network equipment abandons the first topology change message and maintains locally saved address forwarding list items unchanged. The patent also discloses a set of network equipment. According to the invention, repeated TC (Topology Change) messages can be filtered.

Description

technical field [0001] The invention relates to the field of information technology, in particular to a method for transmitting and processing a topology change (TC) message and a network device. Background technique [0002] In a Layer 2 network with redundant backup links, it is necessary to rely on topology control protocols to block redundant links to eliminate data forwarding loops in the network, and when the current forwarding link fails, the blocked backup link Switch to the active link to take over the forwarding of data traffic. The most typical link layer topology protocol is the STP (Spanning Tree Protocol, Spanning Tree Protocol) protocol family, including STP (Spanning Tree Protocol, Spanning Tree Protocol) originally defined by the IEEE 802.1D standard to RSTP defined by the 802.1W standard (Rapid Spanning Tree Protocol, Rapid Spanning Tree Protocol), and MSTP (Multiple Spanning Tree Protocol, Multiple Spanning Tree Protocol) defined by the later 802.1S stand...

AI Technical Summary

Problems solved by technology

Some topology protocols use the response mechanism for TC propagation, but the sender may continue to send repeated TC messages before receiving the TC message acknowledgment (TCA) from the peer, resulting in unnecessary deletion of forwarding addresses in the network or newer, resulting in flooding of redundant data traffic forwarding

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