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Method, system and search engine for using and managing MAC address list

A search engine and address table technology, which is applied in transmission systems, electrical components, data exchange through path configuration, etc., can solve the problems of consuming memory resources and consuming memory space of access devices, and achieve the effect of saving memory space

Inactive Publication Date: 2007-11-07
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] Saving the upper limit of the customer's MAC address and the number of recorded MAC addresses will consume a large amount of memory space on the access device
[0032] Since only the upper limit of a customer’s MAC address and the number of recorded MAC addresses is saved, it needs to consume a memory space of 2-bit command length. If it is necessary to save the upper limit of a 4K customer’s MAC address and the number of recorded MAC addresses, it needs to occupy 8K commands. The length of the memory space is roughly equivalent to 2Mbits of memory space, and the memory in the forwarding plane of the access device is very scarce and precious. Generally, the access device, such as the configuration of the router interface board, only has a memory space of about 200Mbits. With the rapid development of Metro Ethernet, the number of customers is also increasing rapidly, often exceeding 4K, which will consume more memory resources

Method used

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  • Method, system and search engine for using and managing MAC address list
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  • Method, system and search engine for using and managing MAC address list

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Embodiment Construction

[0048]Embodiments of the present invention provide a method for using a media access control address table, a method for managing a media access control address table, a system for managing a media access control address table, and a search engine capable of three-state search .

[0049] Commonly used search engines that can be searched in three states include: TCAM, International Business Machines Corporation (IBM, International Business Machines) Software Management Tree (SMT, Software Managed Tree) and some search algorithms related to patents, these search engines that can be searched in three states Among the engines, TCAM is the most widely used, and their application methods in the embodiments of the present invention are basically the same, so this article will use TCAM as an example to describe the embodiments of the present invention.

[0050] TCAM is a high-speed ternary hardware chip dedicated to table lookup. In addition to "0" and "1", each storage unit of TCAM a...

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PUM

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Abstract

A using method of MAC address table includes seeking MAC address table when message sent by new user of clients is received and filling sour MAC address into idle table item if idle item is hit. The managing method and system of MAC address table are also disclosed.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for using a media access control address table, a method for managing the media access control address table, a system for managing the media access control address table, and a search engine capable of three-state search. Background technique [0002] Due to the various advantages of Ethernet in LAN, Ethernet is gradually becoming the main bearer network in MAN and even WAN, and the application of Metro Ethernet (Metro Ether) is becoming more and more extensive. [0003] In Metro Ethernet, access network devices from the same port, or the same virtual local area network (VLAN, VirtualLAN), or the same virtual switch instance (VSI, Virtual Switch Instance), or any combination of the three A collection of all users can be called a customer, a customer can be understood as an enterprise or a virtual private network (VPN, Virtual private network), which will contain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28H04L29/06
Inventor 谭学飞
Owner HUAWEI TECH CO LTD