Method for preventing disturbance of medium accessing control address table on access equipment

A medium access control and access device technology, applied in the field of communication, can solve the problems of confusing data packet forwarding, wrong data packet forwarding, no security policy control, etc., so as to prevent the disturbance of the MAC address table and ensure the effect of correct forwarding.

Active Publication Date: 2008-01-02
ZTE CORP
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Problems solved by technology

[0005] The Layer 2 Media Access Control (MAC) address forwarding table of the Ethernet switch chip of the access device is the core data table for the switch chip to exchange data packets. Since its MAC address learning generally has no security policy control, when it has the same If the data packets of the source MAC enter the switching chip from different ports of the switching chip, the MAC address table will be frequently migrated, which will cause confusion in the forwarding of data packets with this MAC address as the destination MAC

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  • Method for preventing disturbance of medium accessing control address table on access equipment

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Embodiment Construction

[0023] The access device is divided into two components, the control plane and the data plane. The control plane uses the CPU as the core for protocol and network management processing; the data plane uses the Ethernet switching chip as the core for normal data forwarding by users.

[0024] A preferred embodiment of the present invention will be described in detail below with reference to FIG. 1 .

[0025] The data plane with the switch chip as the core needs to turn off the MAC address learning function. All MAC address learning is manually set by the MAC address learning module of the control plane using a static MAC address. The aging of the MAC address is also controlled by the MAC address learning module. .

[0026] The control plane includes two components: a MAC address learning module and a MAC address legality checking module. The main job of the MAC address learning module is to replace the non-strategic MAC address learning function of the switching chip. Together...

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Abstract

The invention discloses a method for avoiding interference of medium access control address list on access device, comprising that an exchange chip in data plane closes the MAC address study at network port, a MAC address study module exchanges the MAC address study function of the exchange chip, the MAC address study module and a MAC address legality check module filter illegal MAC address study to build a legal MAC address list, a control plane sets studied a new legal MAC address list into the exchange chip, and starts an aging process, when aged, deletes the MAC address of the exchange chip. Since the exchange chip uses static MAC address, the invention converts the dangerous MAC address study function of exchange chip into safe MAC address study of control plane, to avoid MAC address list interference caused by source MAC attack.

Description

technical field [0001] The invention relates to a communication method, in particular to a method for preventing disturbance of a medium access control address table on an access device. Background technique [0002] The broadband access network is rapidly migrating from Asynchronous Transfer Mode (ATM) technology to Ethernet technology. The main access equipment of the entire access aggregation network, from DSLAM to aggregation switch, is a Layer 2 network, which brings some safe question. [0003] A MAC (Media Access Control, Media Access Control) address is an identifier for identifying a LAN (Local Area Network) node. The physical address of the network card is usually burned into the EPROM of the network card by the manufacturer of the network card (a flash memory chip, which can usually be erased and written by the program). address. That is to say, in the physical transmission process of the bottom layer of the network, the host is identified by the physical addre...

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Application Information

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IPC IPC(8): H04L12/56H04L29/06H04L12/46H04L29/12
Inventor 陈爱民
Owner ZTE CORP
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