Method and device for releasing decapsulation entry hardware entry resource, equipment and system

Abstract

The invention discloses a method and a device for releasing decapsulation entry hardware entry resource, and equipment and a system. An inlet provider edge (PE) of a multicast data stream immediately sends notification messages of releasing the hardware entry resource of the decapsulation entry to each outlet PE of the multicast data stream when judging the Data-multicast distribution tree (MDT) capsulation entry is deleted, and after receiving the notification message, an outlet PE timely releases the hardware entry resource of the invalid decapsulation entry which is specified by the notification message according to the indication of the notification message. The problems the outlet PE still needs to wait for the overtime of an MDT-join aging timer and then releases the hardware entry resource of the decapsulation entry even though the decapsulation entry becomes an invalid entry, the shortest path tree (SPT) of the Data-MDT cannot be established as the hardware entry resource is not released timely, and the user multicast data stream is cut off in the prior art are solved.

Description

Technical field [0001] The present invention relates to the technical field of multicast virtual private network (Virtual Private Network, VPN), in particular to a method, device, equipment and system for releasing hardware table item resources of decapsulation table items. Background technique [0002] A virtual private network (Virtual Private Network, VPN) refers to the provision of dedicated communication links for users on public networks. These dedicated communication links do not need to be implemented by setting up dedicated physical links, so they are called virtual private networks. [0003] The VPN is composed of a carrier edge device (Provider Edge, PE), a carrier core router (Provider, P), and a customer edge device (Customer Edge, CE). PE is connected to CE, it puts the user network data arriving on CE to the public network for transmission (PE in this position is called ingress PE); and it also transmits packets carrying user network data from the public network thro...

AI Technical Summary

Problems solved by technology

[0011] The embodiment of the present invention provides a method to solve the problem of the Data-MDT decapsulation table of the egress PE when the Data-MDT address of the ingress PE changes and the Data-MDT encapsulation entry is deleted in the existing VPN multicast technology. The hardware entry resources of the entry cannot be released in time, resulting in the problem of interruption of user multicast data flow

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