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Forwarding method for multicast message in VPLS, and service provider edge equipment

A technology of multicast message and multicast forwarding table, which is applied in the field of network communication, can solve problems such as excessive occupation of public network bandwidth resources and increase the burden of PE equipment, and achieve accurate forwarding, saving public network bandwidth resources, and reducing burdens Effect

Active Publication Date: 2011-05-04
NEW H3C TECH CO LTD
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Problems solved by technology

This is obviously not what host 2 wants to receive, and the PE copies a packet for each PW and AC, which increases the burden on the PE device and occupies more valuable public network bandwidth resources.

Method used

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  • Forwarding method for multicast message in VPLS, and service provider edge equipment
  • Forwarding method for multicast message in VPLS, and service provider edge equipment
  • Forwarding method for multicast message in VPLS, and service provider edge equipment

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] The method provided by the present invention mainly includes: creating a PW logical interface associated with each PW, and the PW logical interface is associated with a VSI; using the PW logical interface as a Layer 2 Ethernet interface on the PE to establish a multicast corresponding to the VSI Forwarding table entry; after PE receives the multicast message, it determines the VSI associated with the incoming interface receiving the multicast message, and uses the determined outbound interface list of the multicast forwarding table entry corresponding to the VSI to forward the multicast message. Forward.

[0022] In the above method, after the PW logical interface is created, the PW logical interface can be applied to Layer 2 multicast prot...

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Abstract

The invention provides a forwarding method for a multicast message in a virtual private local area network (LAN) service (VPLS), and service provider edge equipment (PE). Through the establishment of a virtual link (PW) logic interface, a second layer multicast protocol is introduced into a second layer control plane. At the view angle of the second layer control plane, the PW logic interface is the same as the common second layer Ethernet interface and can participate in the calculation of various application protocols of the control plane. In the invention, the established PW logic interface is taken as the second layer Ethernet interface to operate the second layer multicast protocol, a corresponding multicast forwarding table entry is established, and the multicast message is forwarded according to the established multicast forwarding table entry, so that the multicast message is correctly forwarded, the burden of the PE equipment is reduced and the bandwidth resources of a public network are further saved.

Description

technical field [0001] The invention relates to network communication technology, in particular to a method for forwarding multicast messages in VPLS and service provider edge equipment (PE). Background technique [0002] Virtual Private LAN Service (VPLS) is an implementation of Multi-Protocol Label Switching Layer 2 Virtual Private Network (MPLSL2VPN), which is used to provide multipoint-to-multipoint L2VPN services. Typical VPLS networking is as follows: figure 1 As shown, the networking configuration process can be: establish a public network tunnel between service provider edge equipment (PE), the public network tunnel can be Generic Routing Encapsulation (GRE), common label switched path (LSP) or other type of tunnel; then create a virtual switching instance (VSI) on each PE and configure a virtual link (PW) in the VSI, requiring the establishment of a fully connected PW between all PEs; finally, the access circuit (AC) interface Added to the VSI, where the AC interfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/46H04L12/18H04L29/06H04L45/50H04L45/741
Inventor 王伟锋
Owner NEW H3C TECH CO LTD
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