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Method and system for implementing internet group management protocol snooping and modem

A technology of modem and management protocol, applied in the field of communication, can solve the problems of no solution, black screen of local area network equipment, etc., and achieve the effect of preventing black screen

Active Publication Date: 2015-01-28
浙江杭海新城控股集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that LAN devices in related technologies often appear black screens because they cannot receive a certain channel, no effective solution has been proposed so far

Method used

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  • Method and system for implementing internet group management protocol snooping and modem
  • Method and system for implementing internet group management protocol snooping and modem
  • Method and system for implementing internet group management protocol snooping and modem

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Embodiment Construction

[0023] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0024] Figure 4 It is a schematic diagram of a system for implementing IGMP monitoring according to an embodiment of the present invention.

[0025] Such as Figure 4 As shown, the system for implementing IGMP monitoring includes an uplink device 10 , a modem 20 and a LAN device 30 .

[0026] Wherein, the LAN device 30 is used to send the leaving message; the modem 20 is used to receive the leaving message, query the multicast table, and save the leaving message when the multicast in the multicast table is found to have multiple entries, and Send a query message to the LAN device, and if no response is received from the LAN device, send the leave message to the uplink device, and the uplink...

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PUM

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Abstract

The present invention discloses a method, a system and a modem for implementing Internet Group Management Protocol (IGMP) snooping. The method for implementing IGMP snooping includes: the modem receives a leave packet from a Local Area Network (LAN) device, searches a multicast table, stores the leave packet when it is retrieved that the multicast in the multicast table includes multiple entries, transmits a query packet to the LAN device, and transmits the leave packet to an upstream device on the condition that no response is received from the LAN device. With the present invention, the black screen caused by the LAN device failing to receive a certain channel can be prevented.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method, system and modem for realizing Internet Group Management Protocol Snooping (IGMPSnooping for short). Background technique [0002] At present, the IGMP Snooping of the general Modem (modem) is to maintain a multicast address by listening to the IGMP messages communicated between the local area network (Local Area Network, referred to as LAN) side users and the (Wide Area Network, referred to as WAN) WAN port uplink device. The forwarding table corresponding to each port on the LAN side. After receiving the multicast data packet, look up the table according to the multicast address to determine which LAN ports should forward the multicast packet. The main process for IGMPv2 packets is as follows: [0003] When receiving an IGMP report (response) message from a pc (computer), stb (set-top box), etc. from a LAN port, (using multicast address, LAN port, source mac) to fin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26
CPCH04L43/18
Inventor 唐剑波
Owner 浙江杭海新城控股集团有限公司