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Method of processing packet of virtual LAN for network switch

A technology of virtual local area network and network switch, which is applied in the direction of switchboard, network interconnection, data exchange details, etc., and can solve problems such as inability to distinguish network segments or physical networks, and problems with network switches

Active Publication Date: 2009-02-11
VIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if there are more than two network segments or physical networks with the same VID connected to the ISP network via a network switch, the network switch will not be able to distinguish these network segments or physical networks with the same VID, and when receiving Problems with network switches occur when packets that should be forwarded to these segments or physical networks

Method used

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  • Method of processing packet of virtual LAN for network switch
  • Method of processing packet of virtual LAN for network switch
  • Method of processing packet of virtual LAN for network switch

Examples

Experimental program
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Embodiment Construction

[0021] figure 2 It represents a network system 200 connecting two local area networks (Local Area Network, LAN) 202 and 204, wherein the two local area networks 202 and 204 both belong to a virtual local area network but are separated by two places. The LAN 202, 204 is a local area network or a network segment (LAN segment). Since the LANs 202 and 204 both belong to the same VLAN, the packets from the LANs 202 and 204 have the same virtual LAN identifier (VID). Since the local area networks 202 and 204 are separated by two places, the local area networks 202 and 204 must first be connected to local service provider networks (provider networks) 212 and 214 respectively, so as to be further connected to the service provider backbone network (backbone provider network) 210 to realize the local area network 202. Packet exchange with 204.

[0022] For example, the local area network 202 can be the network of a research department of a company located in city A, and the local area...

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PUM

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Abstract

The present invention provides a method for processing packets of a virtual LAN in a network switch comprising: first, a packet is received through an input port of the network switch; reading the virtual LAN identification code of the packet; determining the correlative port group of the virtual LAN according to the virtual LAN identification code of the packet, wherein the correlative port group of the virtual LAN represents a group composed of all the ports specially used for processing the packet of the virtual LAN in the network switch; determining the delivering domain of the packet according to the input port of the packet, wherein the delivering domain represents a group composed of all the ports specially used for processing the packet of the first subnetwork in the network switch; finally, determining the output port of the packet according to the correlative port group of the virtual LAN and the delivering domain of the packet.

Description

technical field [0001] This invention relates to network communications, and more particularly to network switches. Background technique [0002] A Virtual Local Area Network (VLAN) is a logically independent network rather than physically independent. Several VLANs can coexist on a PLAN switch at the same time. IEEE802.1Q is a communication protocol that regulates virtual local area networks. [0003] Early VLANs were often used to reduce the size of a single large network segment to reduce collision domains and improve performance. While Ethernet switches solve this problem, VLANs are used to shrink the broadcast domain of the media access control layer (MAClayer). Another application of VLANs is to restrict access to network resources independent of the configuration of the physical LAN, although the effectiveness of this function is debated. [0004] FIG. 1 shows a packet format 100 of the IEEE 802.1Q standard. Fields 102 and 104 are the destination MAC address and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L12/04H04L12/46H04L29/02
CPCH04L49/354H04L12/4645H04L45/00H04L45/16H04L45/80
Inventor 陈维彬陈英钟赵云飞钟名超
Owner VIA TECH INC