Method and device for detecting multicast transmission path

Abstract

The invention provides a method and a device for detecting a multicast transmission path. The device comprises a message transceiving unit, a path analyzing unit and a detection processing unit, wherein the message transceiving unit is used for sending a unicast detection message or a multicast detection message to a head jump router to detect a unicast or multicast transmission path reaching an appointed multicast source, and receiving a unicast detection reply message or a muticast detection reply message; the path analyzing unit is used for determining the transmission path information of the multicast source according to the unicast detection reply message, and the transmission path information comprises the connection relationship among a plurality of routers on the transmission path; and the detection processing unit is used for analyzing the multicast detection reply message, indicating the message transceiving unit to resend the multicast detection message when error information is analyzed, and taking the next jump router of the router with the added error information as a new head jump router. According to the invention, a user can be assisted to acquire the situation of the multicast transmission path reaching the appointed multicast source in a network accurately and completely.

Description

technical field [0001] The invention relates to multicast technology, in particular to a detection method and device for a multicast transmission path. Background technique [0002] IP technology has become the mainstream network technology today, and video surveillance based on IP technology has become the mainstream of current video surveillance. Although IP multicast technology has a long history and various standards are becoming more and more perfect, it is rarely used in practical applications. However, in IP monitoring, the natural superiority of multicast technology has been widely used. [0003] In a large multicast network, how to detect the multicast function of the entire network is a common technical problem to be solved in the industry. The current multicast detection method is mainly to execute the Mtracert command on the decoding terminal (such as various software and hardware decoders), and specify a starting point to a certain source for multicast function...

AI Technical Summary

Problems solved by technology

[0006] The Mtracert mechanism can obtain the multicast information on a link, but in the monitoring network, the multicast bearer network is various, and some routers may not support the MTracert function or the multicast configuration is incorrect. Sometimes it will cause the path detection to fail

still with figure 1 For example, if an interface that joins R3 is not configured for multicast, the user cannot continue to detect the multicast status of R2

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