A multicast protection device and method

Abstract

The invention provides a multicast protective device and a method, and relates to the field of protection and switch of multicast business in a network communication. The multicast protective device comprises an original resource management module, a written caching module, an original queue management module, an original queue scheduling module, a protecting and switching information base, a port scheduling module and a cache reading module which are connected in sequence. The multicast protective device further comprises a switching queue resource management module, a switching queue management module and a switching queue scheduling module which are connected in sequence. The original queue scheduling module is further connected with a copy database; the protecting switching information base is further connected with the switching queue resource management module. The switching queue scheduling module is connected with the port scheduling module. If a data package doesn't need switching, the data package is switched to a switching queue and waits for the switching port queue scheduling; if the switching is needed, the data package is directly output to a follow-up module. The multicast protective device and the method haves the advantages of being rapid and simple in protecting and switching, and the complexity of the resource management is avoided, a large quantity of complex softwares is unnecessary and the cost is reduced.

Description

technical field [0001] The invention relates to the field of protection switching of multicast services in network communication, in particular to a multicast protection device and method. Background technique [0002] Multicast service is a point-to-multipoint service. Video conferencing, online teaching, and webcast are all multicast services. Multicast services play an important role in network applications. In packet-based multicast (such as IPMC multicast, MPLS multicast, and MAC layer multicast), packet replication technology is required to implement multicast. It is necessary to be able to copy a packet to multiple physical interfaces, and a physical interface Multiple copies may be made. Different application scenarios have different requirements for the number of copies. The problem of copying packets has always been a difficult point in packet switching chips, involving storage resource management, queue management, and queue scheduling. [0003] In traditional t...

AI Technical Summary

Problems solved by technology

Because the software not only needs to calculate the configuration to be changed, but also gives the steps to modify the configuration, and then modify the linked list according to the modification steps, and there are many possibilities for link transmission failures, so the above two requirements will lead to software processing It is very complicated. It can be seen that using software to change the configuration of the linked list requires a very complicated software calculation process and more resources. In the case of a large amount of modification, it cannot meet the requirements of automatic protection switching in time.

[0006] For the automatic protection switching function of the 1:N protection mode of the multicast service, there is another method in the equipment realization, which is to complete the multicast copy by one chip or a single disk, and then complete the automatic protection and switching function by other chips or single disks , but the disadvantages of doing so are: increasing the cost of equipment, especially for small equipment

[0007] The 1:N protection switching of unicast packets is realized by modifying the forwarding path in time. It is a good way to apply this idea to multicast packets. However, when protection switching occurs, the data packets may change the forwarding ports and queues. , which will cause problems in buffer management and queue scheduling based on output ports

Images