Method of message transmission, backbone switch and access switch

Abstract

The invention provides a method of message transmission, a backbone switch and an access switch. The method comprises that when a communication link between a first backbone switch and a second backbone switch fails, the first backbone switch transmits a notification message to a first access switch, and the notification message is used for indicating the first access switch to divide a first V-shaped communication link in the same trunk among the first backbone switch, the second backbone switch and the first access switch into a second communication link and a third communication link in two trunks; the first backbone switch receives a response message transmitted by the first access switch; and the first backbone switch transmits a packet to the first access switch through the second communication link, so that the first access switch can transmit the packet to the second backbone switch through the third communication link. The embodiment of the invention can maintain the normal operation and non-splitting of an SVF system when the peer-link fails, thereby maintaining the same bandwidth of the SVF system.

Description

technical field [0001] The invention relates to the communication field, in particular to a message transmission method, a backbone switch and an access switch. Background technique [0002] The Super Virtual Fabric (English: SuperVirtualFabric, referred to as: SVF) system refers to multiple different types of equipment formed into a logical system through a mixed stack protocol, in which the remote equipment only performs forwarding, and the backbone (English: spine) switches are both Perform forwarding and control to manage the entire SVF system. Such as figure 1 The typical scenario of the SVF system shown in the figure adopts uplink dual-homing access. The access switches (called leaf switches in the SVF system) are dual-active connected to the backbone switches, and the backbone switches are connected to the core layer switches. Convergence (English: trunk) selects a port forwarding through hash (English: hash). [0003] In the SVF system, the peer-link is the commun...

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Problems solved by technology

[0003] In the SVF system, the peer-link is the communication link that carries the management channel and service channel between the backbone switches. If the peer-link fails, the two backbone switches connected by the peer-link will split into two independent dual In the main system, in order to solve the dual-active failure, the dual-active detection protocol (English: Dual-Active Detector, referred to as: DAD) will close all ports on one of the backbone switches, the backbone switch will be completely unavailable, and all upstream and downstream traffic will be switch to another backbone switch, causing the bandwidth of the SVF system to be halved

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