Stack system and message forwarding method thereof

Abstract

The invention discloses a stack system and a message forwarding method thereof. In each stack equipment, a multicast table entry of a corresponding interface board is arranged for each stack port of all stack equipment respectively, an index which indicates the stack port and can be carried in a stack protocol message is arranged in the multicast table entry of the corresponding interface board; wherein the multicast table entry of the interface board corresponding to the stack port on each side of the equipment is used for transmitting the stack protocol message through the stack port of theequipment; multicast table entries of interface boards corresponding to each stack port of other equipment are used for reporting the received stack message to CPU, or duplicating and forwarding the stack message while reporting to the CPU. Therefore, the interface board of each stack equipment can use the corresponding multicast table entry of the interface board from the corresponding stack port to correctly transmit the stack protocol message according to the index indicating the stack port of the equipment in the stack protocol message; the corresponding multicast table entry of the interface board can be used for correctly reporting and continuously forwarding according to the indexes indicating the stack ports of other equipment in the received stack protocol message.

Description

technical field [0001] The invention relates to stacking protocol message forwarding technology, in particular to a stacking system capable of realizing stacking protocol message forwarding among stacking devices, and a stacking protocol message forwarding method in the stacking system. Background technique [0002] A stacking system is formed by interconnecting multiple devices through stacking interfaces, where each stacking device has a stacking port on both sides (the "both sides" mentioned in this article are not used to limit the physical position of the stacking port), And the stacking port on each side is connected to the stacking port on the other side of the adjacent stacking device on that side, that is to say, two adjacent stacking devices are connected through the stacking port on the opposite side. In a stack system, it is extremely important to correctly forward stack protocol packets between stack devices. Among them, the message type includes hop-by-hop sta...

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Problems solved by technology

[0004] However, the packet forwarding method in the above-mentioned stacking system is only applicable to the box-type stacking system. Each stacking device in the box-type stacking system has only one Each stacking device has a distributed structure including the main control board and interface board, and only the CPU on the main control board can identify the stack port that should be used as the output port of the hop-by-hop packet / broadcast After the broadcast message is forwarded between the boards, it cannot be distinguished on the interface board from which stack port the hop-by-hop message / broadcast message should be sent.

[0005] It can be seen that the existing technology cannot guarantee the correct forwarding of packets between distributed stacking devices in the frame stacking system

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