Method for preventing stack system from generating loop and member equipment in stack system

Abstract

The invention discloses a method for preventing the stack system from generating a loop and member equipment in the stack system. The method comprises the following steps that: the member equipment in the stack system receives a message from a stack port and judges whether the received message is a known unicast message; if the received message is a known unicast message, the member equipment in the stack system forwards the message; and otherwise, the member equipment in the stack system detects the loop in the received message and discards the received message if loop generation is detected or forwards the received message if loop generation is not detected. The method can prevent a reoriented message from being discarded by mistake when the reoriented message receives the loop detection and avoid influences on the effect of loop detection.

Description

technical field [0001] The invention relates to a stacking technology in the field of data communication networks, in particular to a method for preventing loops in a stacking system and a member device in the stacking system. Background technique [0002] With the rapid increase of network scale, stacking technology emerges as the times require. Stacking technology refers to connecting two or more network devices through stacking ports to form a stacking system. Logically speaking, the stacked network devices are equivalent to the same device, and the user manages the stack system just like managing one device. [0003] figure 1 It is a schematic structural diagram of a stacking system in which four devices are stacked in the prior art. Such as figure 1 As shown, the stacking system includes multiple network devices connected together through stacking cables, and these network devices are called member devices. Each member device has at most two stack ports, which are ...

AI Technical Summary

Problems solved by technology

Since the source device information of the packet usually remains unchanged during the forwarding process, at this time, device 2 receives a packet from stack port 1 whose source device is itself, and device 2 will discard the packet, resulting in an error

[0014] It can be seen that the above-mentioned solution to prevent loops in the stacking system may cause the packets redirected to the service sub-card to be discarded by mistake when receiving the loop check, so Not applicable to stacking systems with service subcards

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