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Multipoint transmission device and method in virtual LAN environment

A technology of a virtual local area network and a transfer device, which is applied in the field of devices for distributing information, can solve the problems that multicast information cannot be transferred, and system resources are not fully utilized.

Inactive Publication Date: 2004-06-09
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The way of querying based on individual VLANs is a centralized and serialized (Serialized) process, which does not make full use of system resources, even if the output queue (Output Queue) on the network port of the network device ) are still available
[0006] (2) There is a delay time between the above-mentioned VID query and forwarding, the more VLANs associated with the multicast address, the more delay time will be accumulated, so that the multicast information cannot be transmitted at a high-speed line speed ( Wire-speed) transfer

Method used

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  • Multipoint transmission device and method in virtual LAN environment
  • Multipoint transmission device and method in virtual LAN environment
  • Multipoint transmission device and method in virtual LAN environment

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Experimental program
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Embodiment Construction

[0037] The problem of forwarding multicast information across multiple VLAN ranges described above can be reduced to a 3-D query problem. FIG. 1A is a schematic diagram of a 3-D access model according to the present invention. The 3-D access model The three axes of 10 are multicast-id (hereinafter referred to as Mid), network port identification code (Port-id, hereinafter referred to as Pid) and virtual local area network identification code (VLAN-id, hereinafter referred to as VID) respectively. , there is also an auxiliary pointer called the identification code selection pointer 12 for selecting the VID. Each Mid is a unique index value assigned to each multicast address. In addition, each network port of the network device is assigned a corresponding Pid, ​​and the identification code selection pointer 12 can be drawn from Mid and Pid (later details). The ID selection pointer 12 selects the VID associated with the multicast address from the ID tag list, and each pair (Mid,...

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Abstract

A device executing transmission and transfer of IP multipoint in the environment of virtual local network is suitable to be used to transfer multipoint transmission information to multipoint transmission address between the network ports of network equipment. The multipoint transmission address can contain several VLAN, each havinga multipoint transmission distination sub collection to be composed by more than one distination ports and the distination port is appointed from the network ports of the network equipment. The device includes creating unit to create a port group of multipoint transmission distination, querier being used to map the multipoint transmission address to a index value, transmitter coupled to the querier to distribute the index value.

Description

technical field [0001] The present invention relates to a device and method for distributing information in a computer network, in particular to a device and method for effectively distributing IP multicast (IPMulticast) information in a virtual local area network (Virtual Local Area Network) environment. Background technique [0002] A virtual local area network (Virtual Local Area Network, hereinafter referred to as VLAN) is a switched network that can be logically distinguished on the basis of organization rather than entity or geographical location, function, work team, or application . For example, the workstations used by a particular workgroup are all connected to the same VLAN, regardless of the physical connection of their networks or the fact that they may be intermingled with other teams. Network reconfiguration can be performed through software without actually unplugging and moving devices or cables. U.S. Patent No. 5,394,402 once propo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/18H04L12/28H04L45/16
Inventor 刘广治李枋壅
Owner ZTE CORP