Method and device for switching tunnels
A tunnel and switching unit technology, applied in the field of communication, can solve the problems of wasting S-PMSI tunnel resources and S-PMSI tunnel bandwidth waste, and achieve the effect of avoiding repeated creation and reducing waste
Inactive Publication Date: 2012-04-04
BEIJING HUAWEI DIGITAL TECH
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[0004] However, in the above prior art, due to the limited resources of the S-PMSI tunnel, when there are multiple private network multicast entries that need to share a S-PMSI tunnel for forwarding, and the multiple private network multicast entries belong to different For leaf PEs, there is a problem of S-PMSI tunnel bandwidth waste: when a private network multicasts data, a new S-PMSI tunnel needs to be established, and the new S-PMSI tunnel established is exclusively occupied by the private network multicast , then, after multiple new S-PMSI tunnels are established, there may be two or more S-PMSI tunnels with the same leaf PE, resulting in repeated deployment of tunnels and a waste of limited S-PMSI tunnel resources
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[0018] Embodiments of the present invention provide a tunnel switching method and device, which are used to save S-PMSI tunnel resources and realize dynamic selection of S-PMSI tunnels by PE receivers of private network multicast data traffic. Each will be described in detail below. see figure 1 , an embodiment of the tunnel switching method in the embodiment of the present invention includes:
[0019] 101. Create the selected public network multicast service interface S-PMSI tunnel, and record each leaf operator edge reasoner PE of the S-PMSI tunnel;
[0020] Create an S-PMSI tunnel, and record each leaf PE of the created S-PMSI tunnel.
[0021] Assume the actual MVPN topology as figure 2 As shown, there is 1 multicast source PE and 3 receiver PEs (PE1, PE2, PE3). At first, only PE1 needs to receive the private network multicast traffic G1, and then it needs to switch to the S-PMSI tunnel. Since there is no S-PMSI tunnel at present, create a new S-PMSI tunnel A and reco...
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The embodiment of the invention discloses a method and a device for switching tunnels, which is used for saving S-PMSI (Selective Public Multicast Service Interface) tunnel resource and dynamically selecting the S-PMSI tunnel to switch by receivers PE (Provider Edge). The method of the embodiment of the invention comprises the following steps: building an S-PMSI tunnel, and recording each blade PE of the S-PMSI tunnel; when privacy network multicast data needs switching the S-PMSI tunnel to transit, comparing each receiver PE of the privacy network multicast data with the record blade PE, and switching each blade PE and the S-PMSI tunnel which is the same as each receive PE of the privacy network multicast data according to the comparing result; if each blade PE and the S-PMSI tunnel which is the same as each receive PE of the privacy network multicast data are not exist, building each blade PE and the S-PMSI tunnel which is the same as each receive PE of the privacy network multicast data, recording each blade PE of the built S-PMSI tunnel, and switching the privacy network multicast data to the built S-PMSI tunnel to transmit.
Description
technical field [0001] The present invention relates to the technical field of communications, in particular to a tunnel switching method and device. Background technique [0002] Multicast virtual private network (MVPN, Multicast Virtual Private Networks) is for the existing Multi-Protocol Label Switching (MPLS, Multi-Protocol Label Switching) / Border Gateway Protocol (BGP, Border Gateway Protocol) virtual private network (VPN, Virtual Private Network) to enable multicast services, and transmit the multicast data and control packets in the private network Protocol Independent Multicast (PIM, Protocol Independent Multicast) instance to the remote site of the VPN through the public network. The public network PIM instance does not need to know the multicast data transmitted in the private network, and the private network PIM instance does not need to know the multicast routing information in the public network instance, and the private network PIM instances are isolated from...
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IPC IPC(8): H04L12/56H04L12/18H04L45/16
Inventor 彭维于云福刘毅松
Owner BEIJING HUAWEI DIGITAL TECH