Method and system for restraining multicast transmitting path
A technology of forwarding path and multicast forwarding table, which is applied in transmission systems, digital transmission systems, electrical components, etc., can solve the problems that multicast forwarding paths cannot converge quickly, achieve fast convergence, improve stability and reliability, and reduce The effect of packet loss rate
Inactive Publication Date: 2012-09-05
ZTE CORP
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[0010] In view of this, the main purpose of the present invention is to provide a method and system for multicast forwarding path convergence, to solve the problem that the multicast forwarding path cannot be quickly converged, and to improve the stability and reliability of multicast traffic forwarding
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[0039] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.
[0040] The multicast forwarding path convergence method of the present invention is suitable for general multicast transmission networks, and is particularly suitable for the convergence of loop-based layer 2 multicast forwarding paths. By extending the IGMP SNOOPING standard protocol, when the network topology changes, the designated downstream device sends a special leave message to its routing port. The special leave message is obtained by extending the existing leave message through the IGMP SNOOPING standard protocol; specify After receiving the special leaving message, the upstream device generates and sends the specified group query message; the downstream device sends the received specified group query message through its non-routing port. Receive the specified group query message hop by hop from the user sid...
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The invention discloses a method for restraining a multicast transmitting path, which comprises the steps: when the network topology is changed, an appointed downstream device immediately generates anThe invention discloses a method for restraining a multicast transmitting path, which comprises the steps: when the network topology is changed, an appointed downstream device immediately generates and transmits a special leaving message, the special leaving message is received by an appointed upstream device which generates and transmits an appointed group querying message according to the speciad transmits a special leaving message, the special leaving message is received by an appointed upstream device which generates and transmits an appointed group querying message according to the special leaving message, the downstream devices which receive the appointed group querying message generate and transmit a reporting message according to self multicast transmitting tables, and the upstreaml leaving message, the downstream devices which receive the appointed group querying message generate and transmit a reporting message according to self multicast transmitting tables, and the upstreamdevices which receive the reporting message update self multicast transmitting tables according to the reporting message. The invention also discloses a system for restraining a multicast transmittin devices which receive the reporting message update self multicast transmitting tables according to the reporting message. The invention also discloses a system for restraining a multicast transmitting path, and the multicast transmitting path can be quickly restrained based on the method and the system.g path, and the multicast transmitting path can be quickly restrained based on the method and the system.
Description
technical field [0001] The invention relates to multicast technology, in particular to a method and system for multicast forwarding path convergence. Background technique [0002] Multicast technology is a point-to-multipoint transmission technology. In the field of network data transmission applications, multicast has efficient bandwidth utilization capabilities and the ability to transmit the same data to multiple receiving sites at one time. At present, the multicast technology has been widely used in network value-added services such as video on demand, Internet Protocol Television (IPTV, Internet Protocol Television), video conferencing, distance education, Internet radio, and online games. Due to the characteristics of the multicast technology itself, it has great development prospects in the field of IP networks. [0003] The Internet Group Management Protocol (IGMP, Internet Group Management Protocol) is a multicast protocol that runs at the network layer. Currently...
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IPC IPC(8): H04W40/02H04L12/56
CPCH04L12/185
Inventor 沈洋
Owner ZTE CORP