Method and device for mac address aging in stacking system

Abstract

The present invention provides a method and device for MAC address aging in a stacking system. The method includes: creating a multicast forwarding group for chips in the stacking system, and the members of the multicast forwarding group are stack ports corresponding to each chip; and Each chip creates a mirror configuration, and the destination of each chip mirror configuration is a multicast forwarding group; when any chip receives a message, if it is an ingress chip, it obtains the MAC address carried in the message; and refreshes the message corresponding to the current MAC address When it is marked as enabled, the message received by the current chip is mirrored according to the created mirroring configuration; if it is a stacked chip, it directly parses the message that is diffused to the current chip through mirroring processing, and obtains the MAC address it carries; While obtaining the MAC address carried by the message, the state of the MAC address is refreshed, and if the corresponding aging flag of the MAC address is enabled, the current MAC address is aged; the present invention does not require CPU to participate in the aging process of the MAC address , to reduce the implementation difficulty of the chip.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a method and device for aging MAC addresses in a stacking system. Background technique [0002] The stacking system is a type of technology that is widely used to expand ports on Ethernet switches. Its biggest advantage is to provide simplified local management and manage a group of switches as one object. In the application of the stack system, a mechanism is needed to refresh and age the MAC addresses. [0003] In the prior art, there are mainly the following schemes to implement MAC address aging in a stack system. MAC (MediaAccess Control or Medium Access Control), free translation for media access control, or physical address, hardware address, used to define the location of network devices. [0004] Solution 1, set a timer in the hardware to periodically scan the MAC address table; if the HIT status of the MAC address scanned by the timer is 0, delete the MAC address ...

AI Technical Summary

Problems solved by technology

[0006] like figure 1 As shown, chip 3 is not on the forwarding path of a certain message, then the previously learned MAC address information on chip 3 will not be refreshed, and will eventually be judged to be aging by the hardware timer scan, and then the CPU will be notified. For solution 2, in the process of MAC address aging, in order to avoid premature aging of some MAC addresses and cause inconsistencies in the address table, the CPU needs to be heavily involved in the aging process of MAC addresses. The overall solution is complex and expensive

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