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Data exchange method based on virtual local area network

A virtual local area network and virtual switching technology, which is applied in the field of computer communication networks, can solve the problems of shortage of VLAN identification resources, complex VLAN identification allocation and management, etc., and achieves the effect of alleviating the shortage of resources and facilitating allocation and management.

Inactive Publication Date: 2005-10-05
HUAWEI TECH CO LTD
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Problems solved by technology

In this way, the input VLAN identification and output VLAN identification of the data packet need to be consistent; and the VLAN identification of each VLAN user group must be uniformly allocated for the whole network, so there must be a problem of shortage of VLAN identification resources in large-scale network systems , and the complexity of VLAN ID allocation and management

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  • Data exchange method based on virtual local area network
  • Data exchange method based on virtual local area network
  • Data exchange method based on virtual local area network

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Embodiment Construction

[0042] The VLAN-based data exchange method of the present invention sets a plurality of virtual switching entities in the physical switching device of the data link layer, so that each virtual switching entity corresponds to a VLAN working group, so that each virtual switching entity only works for the VLAN it belongs to. The data frames sent by any device in the group are forwarded; and different physical interfaces or different physical interfaces and VLAN IDs in the physical switching device are set as the logical interfaces of each virtual switching entity; among them, in the physical switching device and The VLAN IDs corresponding to different logical interfaces only need to be guaranteed to be unique within the virtual switching entity, and do not need to be unique in the entire network system, so that the network system can bring flexibility to the management of VLAN IDs and reduce management complexity, and can alleviate the current shortage of VLAN identification resou...

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Abstract

The method includes steps: in physical exchanging device, assigning each user group in VLAN a virtual exchanging entity, assigning physical address table in each virtual exchanging entity; based on physical input interface port number, or both of the said port number and VLAN id packed in data frame, the physical exchanging device gives the data frame to be processed to relevant virtual exchanging entity; based on target physical address packed in data frame, the virtual exchanging entity references physical address table configured and obtains corresponding physical input interface port number, or obtains corresponding VLAN id at same time; base on whether corresponding VLAN id is obtained or not, the virtual exchanging entity modifies VLAN id packed in data frame, and outputs processed result from corresponding physical output interface port. The invention solves issue of lack of VLAN id resources. It is convenient for VLAN id to be assigned and managed.

Description

technical field [0001] The invention relates to the field of computer communication networks, in particular to a data exchange method based on a virtual local area network. Background technique [0002] Virtual local area network (VLAN, Virtual Local Area Network) is an emerging technology that realizes virtual workgroups by logically rather than physically dividing devices in a local area network (LAN, Local Area Network) into individual network segments. VLAN technology allows network managers to logically divide a physical LAN into different broadcast domains (that is, into different VLANs). Each VLAN contains a group of computer workstations with the same requirements, and has the same properties. However, since VLANs are obtained by logically rather than physically dividing LANs, computer workstations in the same VLAN do not need to be placed in the same physical space, that is, these computer workstations do not necessarily belong to the same physical LAN segment. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28H04L12/46H04L45/74
Inventor 庆武廖月明
Owner HUAWEI TECH CO LTD
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