Method and device for releasing decapsulation entry hardware entry resource, equipment and system
A hardware table entry and decapsulation technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve the problems of hardware table entry resources not being released in time, user multicast data flow interruption, etc.
Inactive Publication Date: 2012-10-10
BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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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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[0034] The specific implementation manners of the method, device, device and system for releasing the hardware entry resource of the decapsulation entry provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0035] The method for releasing the hardware entry resource of the decapsulation entry provided by the embodiment of the present invention, for the PE of the multicast source, that is, the ingress PE, the operations performed by it are as follows figure 2 shown, including:
[0036] S201. After the encapsulation entry of the data multicast distribution tree Data-MDT is established successfully, the ingress PE of the multicast data flow judges whether the encapsulation entry of its own Data-MDT is deleted; when the judgment result is yes, perform the following steps S202, when the judgment result is negative, execute the following step S203;
[0037] S202. The ingress PE sends a notification mes...
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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, device and system for releasing hardware entry resources of decapsulation entries. Background technique [0002] A virtual private network (Virtual Private Network, VPN) refers to providing users with dedicated communication links on a public network. These dedicated communication links do not need to be realized by setting up dedicated physical links, so it is called a virtual private network. [0003] The VPN consists of a provider edge device (Provider Edge, PE), a provider core router (Provider, P), and a customer edge device (Customer Edge, CE). The PE is connected to the CE, and it puts the user network data arriving on the CE on the public network for transmission (the PE at this position is called the ingress PE); and it also transmits the message carrying the user network data from the pub...
Claims
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IPC IPC(8): H04L12/56H04L12/46H04L45/16
Inventor 吴世奇
Owner BEIJING XINWANG RUIJIE NETWORK TECH CO LTD