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Multi-to-one VLAN mapping method

A mapping method, a many-to-one technology, applied in the field of many-to-one mapping in switches, can solve the problems of downlink broadcast implementation difficulties, and achieve the effect of facilitating expansion and efficient data transmission

Inactive Publication Date: 2008-01-02
GLOBAL INNOVATION AGGREGATORS LLC
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a flexible and convenient method for downlink broadcasting in order to overcome the difficult problem of downlink broadcasting in the prior art when performing many-to-one VLAN mapping

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  • Multi-to-one VLAN mapping method

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Embodiment Construction

[0022] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] As shown in Figure 1, the VLAN mapping process is analyzed from the perspective of data forwarding. Suppose VLAN1-50 and 100-200 of the downlink port are configured, VLAN A belongs to this range, and is mapped to VLAN B of the uplink port.

[0024] It is divided into two processes of uplink processing and downlink processing for description.

[0025] During uplink processing (that is, the process of sending a packet from the downlink port to the uplink port), the structure of the data packet is 'MAC1|MAC2|VLAN A|0x0800|ip packet', where MAC1 is the destination MAC, MAC2 is the source MAC, VLAN A is the VLAN carried by the data packet, followed by the IP type value and the IP packet: the process includes the following steps:

[0026] 1) The data packet contains VLAN A, and it is found through the attribute table of the inbound interfac...

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Abstract

The invention discloses a multiple-to-one VLAN projection method, comprising that (1), dividing each VLAN of descending port into N regions, while N is integer larger than 1, and each region comprises a plurality of VLAN, (2), a data pack entering into the ascending port of VLAN projection, according to character learns MAC and searches a MAC list, (3), when MAC can not be searched in the step (2), a network processor copies the data pack into N portions, while each portion is relative to a descending VLAN region, (4), the network processor copies each data pack copied in the step (3), while the copied number is the VLAN number contained in each region, to complete the broadcast of data pack in descending port. The inventive method can improve data transmission efficiency, and break the limitations on range and number of descending port VLAN, to support the expansion of descending port.

Description

technical field [0001] The invention relates to the field of data communication using switches, in particular to a method for many-to-one mapping by a switch with a network processor supporting VLAN (Virtual Local Area Network, virtual local area network) mapping. Background technique [0002] With the popularity of switch applications, the application of VLAN technology is becoming more and more extensive. As we all know, the main function of VLAN technology is to combine computers distributed in different geographical locations into a logical network according to work needs. At the same time, the division of VLAN can reduce the broadcast domain and improve the network transmission speed. Direct communication, so that the security performance of the network has been greatly improved. But in fact, in many networks, computers in different VLANs are required to be able to communicate with each other. How to solve the communication problem between VLANs is a problem that needs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/46H04L12/56
Inventor 宋晓娟
Owner GLOBAL INNOVATION AGGREGATORS LLC
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