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A Method of Enhancing igmp Snooping Multicast Learning Limit

A multicast and multicast group technology, which is applied in the branch office to provide special service devices, digital transmission systems, data exchange networks, etc., can solve the problem that the port cannot continue to learn

Active Publication Date: 2016-08-24
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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  • A Method of Enhancing igmp Snooping Multicast Learning Limit
  • A Method of Enhancing igmp Snooping Multicast Learning Limit

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Embodiment Construction

[0025] 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.

[0026] Such as figure 1 As shown, when the port receives a Report message, the processing flow includes the following steps:

[0027] 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, then perform step B;

[0028] B. Judging 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, then perform step C;

[0029] C. Determine whether the Action of the port is Replace, if not, discard the message; if it is Replace, execute step D;

[0030] D. Search the multicast table to determine whether there is a multicast entry for the port, if not, discard the message; if yes, delete...

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Abstract

The invention discloses a method for enhancing IGMP Snooping multicast learning restriction. The invention deletes a multicast group learned by the port, and at the same time adds a processing method after the number of multicast groups learned by the port exceeds the upper limit—replacement , so that the port can continue to learn new multicast groups after the learned multicast group exceeds the upper limit.

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) 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 to learn. In this case, the Report (report) message will generally be dropped (discarded). For example: a port can learn up to 50 multicast groups. Whe...

Claims

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Application Information

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