Repeating method for multi-broadcast message in network communication

Abstract

This invention relates to a forward method for multicast messages in network communications which arranges transfer matching conditions at the interface of a network equipment needed in forwarding multicast messages, the condition stipulates a rule to transfer multicast messages, then multicast messages necessary to be forwarded enter into the network from the said interface to match with transfer matched conditions and to forward the said multicast messages based on the matched result, avoiding the security risk resulted from applying broadcast mode in the link layer and efficiency loss resulted from receiving large quantity of idle multicast messages.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for forwarding multicast messages in network communication. Background technique [0002] With the large-scale use of videoconferencing and the development of IPv6, the application of multicast technology is becoming more and more extensive. The forwarding of the multicast message is usually realized by cooperation of IGMP (Multicast Group Management Protocol) and multicast routing protocol. The specific implementation method is to run a multicast routing protocol on each router in the multicast network, which can be DVMRP (distance vector multicast routing protocol), PIM-DM (protocol independent multicast-dense mode), CBT (nucleated tree Multicast Routing Protocol) or PIM-SM (Protocol Independent Multicast-Sparse Mode), routers at domain boundaries and hosts that need to join multicast groups also need to run IGMP. The host sends a request to join the mu...

AI Technical Summary

Problems solved by technology

[0005] As can be seen from the above prior art solutions, the existing multicast routing and forwarding methods have the following problems: first, the inherently low security of the IP message is reduced.

When the router sends the multicast message to the application host, the IGMP protocol uses the multicast method to send the message from the interface. On the broadcast network (such as Ethernet), this sending method will cause the message to be sent to the host The host that should receive the message, such as figure 1 In the process, the host PC2 can also receive the multicast message to be sent to PC1, this mechanism sometimes limits the application of multicast to a great extent

Secondly, the inconvenience of the traditional method is also manifested in that the network configuration is cumbersome, there are different configurations for hosts, border routers and forwarding routers, and it also involves multicast routing protocols and multicast group management protocol (IGMP) routers end and client, the requirements for network administrators are relatively high

Third, running multicast routing protocols on all routers will affect the forwarding efficiency of routers, increasing the burden on routers and hosts in the multicast network

Fourth, a large number of multicast protocol packets are generated between routers and routers and between hosts and routers in the multicast network, occupying valuable bandwidth resources

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