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Method for reinforcing IGMP Snooping multicast study limit

A technology of multicast and multicast group, which is applied in branch offices providing special services, digital transmission systems, data switching networks, etc., and can solve the problem that ports cannot continue to learn.

Active Publication Date: 2014-03-05
SHENZHEN NEW GREENNET TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the above problems, solves the problem that the port cannot continue to learn after the learning multicast group exceeds the upper limit, and solves the problem that the IGMP v1 version host will not send a Leave message when leaving

Method used

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  • Method for reinforcing IGMP Snooping multicast study limit
  • Method for reinforcing IGMP Snooping multicast study limit

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Embodiment Construction

[0029] The present invention will be further described in detail with an embodiment below, but it should be noted that the protection scope of the present invention is not limited thereto.

[0030] Such as figure 1 As shown, when the port receives a Report message, the processing flow includes the following steps:

[0031] A. Determine whether the multicast group entry in the Report message already exists. If it exists, only update the aging timer, and then perform step G; if not, perform step B;

[0032] B. Determine whether the multicast group learned by the port exceeds the upper limit, if not, then learn the multicast group, and then perform step G; if it exceeds the upper limit, perform step C;

[0033] C. Determine whether the Action of the port is Replace, if not, discard the packet; if it is Replace, perform step D;

[0034] D. Search the multicast table to determine whether there is a multicast entry for the port. If not, discard the packet;

[0035] E. Search the ...

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Abstract

The invention discloses a method for reinforcing IGMP Snooping multicast study limit. According to the method, by deleting a multicast group which has been studied by a port and adding the processing method of replacement after the number of multicast groups studied by the port exceeds the upper limit, the purpose that the port can still study a new multicast group after the number of the multicast groups studied by the port exceeds the upper limit is achieved.

Description

technical field [0001] The invention relates to the technical field of computer network communication, in particular to a method for enhancing IGMP Snooping (Internet Group Management Protocol Snooping Internet Group Management Protocol Snooping) multicast learning restriction. Background technique [0002] IGMP Snooping is a multicast restriction mechanism that runs on Layer 2 devices and is used to manage and control multicast groups. The specifications of the multicast table on the access layer device are limited. In order to prevent the problem that other ports cannot continue to learn multicast groups after some ports learn a large number of multicast groups, it is necessary to limit the number of multicast groups that the ports are allowed to learn. However, after the limitation, there may be a problem that the port exceeds the learning limit and cannot continue learning. In this case, the Report (report) message will generally be dropped (discarded). For example: a p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/18H04L12/761H04L45/16
Inventor 柳亮
Owner SHENZHEN NEW GREENNET TECH