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Method and apparatus for classifying querying nodes

A node classification and node query technology, which is applied in the branch office to provide special service devices, data exchange details, digital transmission systems, etc., can solve problems such as improper suppression or transmission of messages, misidentification, and IP multicast queryers do not have power, etc.

Inactive Publication Date: 2009-07-01
ALCATEL INTERNETWORKING PE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Otherwise, neighboring IP Multicast routers could be mistaken for IP Multicast queriers, or conversely, resulting in improper suppression or transmission of messages to these neighboring nodes
For example, while IP Multicast routers are generally required to receive all IP Multicast data packets, IP Multicast queriers do not have such sweeping powers

Method used

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  • Method and apparatus for classifying querying nodes
  • Method and apparatus for classifying querying nodes
  • Method and apparatus for classifying querying nodes

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Embodiment Construction

[0020] figure 1 is a schematic block diagram of a data communication network, according to an embodiment of the present invention, the network includes IP multicast routers 10, 20 and IP multicast queriers 30 (collectively referred to as IP multicast nodes), which pass through cables or other The transmission medium, for example wireless, is connected to each other. Multicast routers 10, 20 and querier 30 are respectively connected to end systems 60, 70, 80, 90, and these end systems are also connected to routers 10, 20 and querier 30 via cables or other transmission media, such as wireless. Routers 10, 20, interrogators 30 and end systems 60, 70, 80, 90 preferably communicate using a local area network communication medium such as Ethernet or Token Ring. The Ethernet LAN communication medium is not limited to 10 Gigabit Ethernet, but includes other variants such as Fast Ethernet, Gigabit Ethernet, 10 Gigabit Ethernet, and 802.11b Wireless Ethernet.

[0021] The multicast ro...

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Abstract

Method and apparatus for classifying querying nodes. A querying node is classified as a multicast router if it transmits a multicast routing protocol query message and the node is either unclassified or classified as a multicast querier. The node is classified as a multicast querier if it transmits a multicast group query message and the node is unclassified. IGMP multicast group membership reports are transmitted to both multicast queriers and multicast routers. IP multicast routing protocol data packets, however, are transmitted to only multicast routers.

Description

technical field [0001] The present invention relates generally to Internet multicasting, and more particularly to a method and apparatus for distinguishing different types of query nodes transmitting multicast group queries. Background technique [0002] Internet Protocol (IP) multicast routers use the Internet Group Management Protocol (IGMP) to learn the multicast group membership of neighboring nodes, as described in "Internet Group Management Protocol, Version 2", September 1997 (hereinafter referred to as RFC2236 ), which is hereby incorporated by reference. The protocol exchange defined by IGMP to achieve this learning involves neighboring nodes sending membership reports to IP multicast routers indicating the multicast groups in which the neighboring nodes participate. Membership reports may be unsolicited or in response to membership queries received from IP multicast routers. [0003] Recently new classes of nodes have emerged that are interested in learning IP mu...

Claims

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Application Information

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IPC IPC(8): H04L12/66G06F15/16H04L12/18H04L12/56
CPCH04L45/04H04L12/185H04L45/16
Inventor 杰里米·加尔夫罗伯特·利昂·桑格罗尼兹马克·法恩
Owner ALCATEL INTERNETWORKING PE