Method for identifying multicast by using unicast address in IP network

Abstract

The invention relates to a method for using single-broadcast address to mark multi-broadcast group in IP network, wherein said method comprises; first, selecting one node for each multi-broadcast group, as the main distributing node, and building multi-broadcast information list at said node, whose each item is relative to one multi-broadcast group; the content of item at least contains the name of multi-broadcast group; adding one virtual network interface at said node, and distributing one IP single-broadcast address to said interface; building the relation between virtual network interface and multi-broadcast group on said node, and using the single-broadcast address of virtual interface as the address of multi-broadcast group. The invention can confirm the unique property of multi-broadcast group address, and simplify the distribution of multi-broadcast group address and the design of multi-broadcast route protocol.

Description

technical field [0001] The invention belongs to the technical field of computer communication, in particular to a method for identifying a multicast group on an IP network. Background technique [0002] An IP network is a computer network that uses the IP protocol (Internet Protocol) for communication. Currently, the IP protocol has two versions, IPv4 and IPv6. The IP protocol can provide three communication methods between hosts: unicast, broadcast and multicast. Among them, unicast is a point-to-point communication mode between two hosts. Broadcast means that a data packet sent by a host can reach all hosts in a broadcast domain. Multicast means that a data packet sent by a host can reach a group of hosts in the network. Unlike broadcast, multicast will not transmit data packets to hosts outside the group. [0003] figure 1 A schematic diagram of the structure of a simplified IP network is given. The IP network mainly includes two kinds of nodes: a host (Host) node a...

AI Technical Summary

Problems solved by technology

Because the existing address identification also assumes the role of name identification, the identification of multicast groups lacks the flexibility of unicast addresses. For example, in unicast, a host only has a fixed domain name, but it can have a dynamic address. In this way, even if the host's address changes, it can still be accessed through the host's domain name

[0013] Third, it increases the complexity of router forwarding packets

Since the multicast address does not carry any addressing information, the router needs to process the multicast data packet in a special way, which increases the complexity of the router's data packet forwarding processing

[0014] Fourth, there is a lack of effective dynamic multicast address allocation methods

The complexity of this allocation algorithm also leads to management complexity, such as the need to deploy multiple multicast address servers separately; on the other hand, due to the complexity of the algorithm, it is rarely used in actual equipment

[0015] Fifth, it is not conducive to the deployment of multicast routing protocols

These methods will increase the complexity of multicast routing protocol deployment

[0016] The above-mentioned problems hinder the application of multicast in IP network to a certain extent

Images