Method for preventing flux in stack from being interrupted and stacking equipment

Abstract

The invention discloses a method for preventing interruption of stacked flow and stacking devices. The method comprises the following steps that each stacking device acquires ring formation data of various other devices; after the stacking devices find that stacking topology is converted from the shape of a link into the shape of a physical ring, judgment is made whether devices not meeting the ring formation condition exist among the stacking devices according to the acquired ring formation data of the various devices; if so, a link is selected from all the links between the devices not meeting the ring formation condition and devices meeting the ring formation condition, and then disconnected logically so as to make the flow not pass through the devices not meeting the ring formation condition. The method detects whether all the stacking devices meet the ring formation condition when the ring-shaped topology is physically formed by the stacking devices, logically cuts the ring-shaped topology into the link-shaped topology if not all the stacking devices meet the ring formation condition, so as to avoid entrance of the flow into the devices not meeting the ring formation condition, and further avoid flow interruption.

Description

technical field [0001] The invention relates to the field of stacking technologies, in particular to a method and stacking equipment for preventing flow interruption in stacking. Background technique [0002] The stacking technology connects two or more distributed frame devices to form a logical device. Users manage the stack as if they were managing a single device. The stacking technology has the advantages of high availability, high scalability, and simplified management. All modular devices participating in the stack use the same configuration file. [0003] According to the connection relationship between stack member devices, stacks are divided into chain stacks and ring stacks. Traffic entering from one stack member device may need to be forwarded from another stack member device. The forwarding mechanisms of different types of stack packets may be different. Figure 1-1 is a schematic diagram of data forwarding in a chain stack, and Figure 1-2 is a schematic dia...

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Problems solved by technology

[0004] However, in some cases, forming a ring stack prematurely may cause a stack failure. As shown in Figure 2-1, devices 1 to 4 form a chain stack at the beginning, and the traffic enters from GE1 / 0 / 10 and flows from GE4 / 0 / 10 flows out, and then, as shown in Figure 2-2, device 5 starts to join the stack shown in Figure 2-1, so that devices 1 to 5 form a ring stack. At this time, the optimal forwarding path is 1-5-4 , but it takes a while for device 5 to establish the traffic forwarding entry. If device 5 receives the packet from device 1 before the traffic forwarding entry is established, the packet will be discarded, causing traffic interruption

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